0090016785 10 inch 56- 5870

5.21-i

56/5870 10 INCH VGA COLOUR MONITOR (CD10012XX)

OCTOBER 1999

Contents

56/5870 10 InchVGA Colour Monitor (CD10012XX)

Chapter 5.21

INTRODUCTION ...................................................................................................... 5.21-1

DESCRIPTION OF OPERATION............................................................................. 5.21-2

INSTALLATION ....................................................................................................... 5.21-2MECHANICAL ASSEMBLY............................................................................... 5.21-2SET-UP AND OPERATION................................................................................. 5.21-3

CIRCUIT DESCRIPTION ......................................................................................... 5.21-4GENERAL ............................................................................................................. 5.21-4

Colour Picture Tube .......................................................................................... 5.21-4RGB Video Amplifier/Tubebase....................................................................... 5.21-5Switch Mode Power Supply .............................................................................. 5.21-6Horiz. and Vert. Sync Polarity Circuit .............................................................. 5.21-7Horizontal Deflection Circuit............................................................................ 5.21-8Diode Modulator ............................................................................................... 5.21-9Vertical Deflection Circuit ................................................................................ 5.21-9

ERROR CODES AND DIAGNOSTICS.................................................................. 5.21-11LEVEL 0 DIAGNOSTICS .................................................................................. 5.21-11LEVEL 1 DIAGNOSTICS .................................................................................. 5.21-11

Linearity Test .................................................................................................. 5.21-11Colour Blocks.................................................................................................. 5.21-11B/W Blocks ..................................................................................................... 5.21-11Contrast ........................................................................................................... 5.21-11Beep................................................................................................................. 5.21-11

ERROR REPORTING......................................................................................... 5.21-11STRAPPING........................................................................................................ 5.21-11FUSES.................................................................................................................. 5.21-11MONITOR DISASSEMBLY .............................................................................. 5.21-12

Safety............................................................................................................... 5.21-13Removal of the Top Cover .............................................................................. 5.21-14Removal of the CRT ....................................................................................... 5.21-14Reassembly of the CRT................................................................................... 5.21-15


5.21-iiOCTOBER 1999

Removal of the Deflection & RGB Video Amp/Tubebase PCB's .................. 5.21-15COMPONENT LAYOUT DIAGRAMS............................................................. 5.21-16

Deflection PCB .............................................................................................. 5.21-16PSU PCB ........................................................................................................ 5.21-17Tubebase PCB (Front View) .......................................................................... 5.21-18

Tubebase PCB (Rear View) ................................................................................ 5.21-19SET-UP AND ADJUSTMENTS......................................................................... 5.21-20

Test Equipment ............................................................................................... 5.21-20Set-up of the Character Generator................................................................... 5.21-20Adjustments..................................................................................................... 5.21-22Supply Voltage (+89 Vdc) Adjustment........................................................... 5.21-24Warm Up ......................................................................................................... 5.21-24Horizontal Frequency Adjustment .................................................................. 5.21-24Vertical Hold ................................................................................................... 5.21-24Horizontal Phase/Position ............................................................................... 5.21-24E-W Correction ............................................................................................... 5.21-25Horizontal Linearity ........................................................................................ 5.21-25Horizontal Width............................................................................................. 5.21-25Vertical Linearity ............................................................................................ 5.21-26Set Height (480 Lines) MODE 3..................................................................... 5.21-26Vertical Shift ................................................................................................... 5.21-26Set Height (400 Lines) MODE 1..................................................................... 5.21-26Set Height (350 Lines) MODE 2..................................................................... 5.21-26Focus ............................................................................................................... 5.21-26Cut-Off (Black Level), G2 and White Balance Adjustment ........................... 5.21-27

TROUBLESHOOTING....................................................................................... 5.21-28Tools and Equipment ...................................................................................... 5.21-28Safety Guidelines ............................................................................................ 5.21-28X-Ray Precaution ............................................................................................ 5.21-28Shock Hazard .................................................................................................. 5.21-28Critical Components........................................................................................ 5.21-29No Raster ........................................................................................................ 5.21-29Low or Loss of R, G or B, Raster OK ............................................................ 5.21-30Abnormal Video on CRT Screen - Too Bright - Too Dark ........................... 5.21-30No Blanking, Visible Retrace Line on Background Raster ........................... 5.21-31No Synchronization, Horizontal and Vertical ................................................. 5.21-31Abnormal Vertical Height in 480 Line Mode ................................................ 5.21-32Vertical Mode ................................................................................................. 5.21-33E - W Pincushion Distortion Failure .............................................................. 5.21-33Poor Focus ...................................................................................................... 5.21-33Failure of Switched Mode Power Supply ...................................................... 5.21-34

OSCILLOSCOPE WAVEFORMS ..................................................................... 5.21-35CONNECTOR ASSIGNMENT .......................................................................... 5.21-39

Video and Sync Connector.............................................................................. 5.21-39Power Input Connector.................................................................................... 5.21-39

SCHEMATIC DIAGRAMS ..................................................................................... 5.21-39

5.21-1


OCTOBER 1999

Contents

Chapter 5.21

56/5870 10 InchVGA Colour Monitor (CD10012XX)

INTRODUCTIONThis chapter describes the 10 Inch VGA Colour Monitor used on NCR 56/5870Automatic Teller Machines (ATMs).

The monitor is a self contained replaceable unit capable of displaying com-puter generated graphics and text.


5.21-2OCTOBER 1999

DESCRIPTION OF OPERATIONThe high resolution colour monitor, model 009-0009987 operates as a VGAcompatible video display and is suitable for use with interactive videoapplications to display computer generated texts and graphics.

It drives a high resolution colour picture tube with a non-glare dark glassscreen formatted as dot trios on 0.28 mm (0.011 in) pitch. The CRT is pre-assembled with a yoke which is factory adjusted for purity and convergence,therefore, no adjustment is provided or necessary for field installation.

Separate Red, Green, Blue (R, G, B) analogue signals are required as datainput and separate Horizontal (H) and Vertical (V) synchronizing pulses areneeded to drive the horizontal and vertical circuits of the monitor. The syn-chronising pulses are at TTL level. The monitor will automatically sense posi-tive and negative polarities of both H and V sync. pulses in order to displaythe following three modes or display formats:

The monitor runs at the horizontal line rate of 31.5 kHz and a verticalrate of 60 Hz or 70 Hz depending on the mode chosen.

It is a self powered unit which features an Automatic Mains Selector(AVS) compatible with 50 Hz and 60 Hz mains frequencies. The AVS is locatedinternally on the Power Supply Unit (PSU) Printed Circuit Board (PCB)(which contains the Switch Mode Power Supply (SMPS)), and is capable ofoperating on two mains frequency ranges, these being either 110 VRMS (88Vac - 132 Vac) and 220 VRMS (176 Vac - 276 Vac).

INSTALLATIONThe illustration below shows an exploded view of the assembly of the monitor.

MECHANICAL ASSEMBLYThe monitor is assembled in a metal box and consists of the followingcomponents:-

z A 10 inch colour CRT with the pre-assembled purity and convergencealigned scan yoke

z The PSU PCB mounted on the right hand side of the metal work as viewedfrom the front of the monitor

z The wedge shaped Deflection PCB contains the sync. polarity sensor cir-cuit and both vertical and horizontal scan generating circuits (includingthe E-W diode modulator). This panel is mounted on the left hand side ofthe metal work as viewed from the rear of the monitor

z The RGB Video amp./Tubebase PCB contains the RGB video amplificationcircuits as well as the tube base circuitry, this PCB is mounted on the CRTtubebase

Resolution Sync Polarity

Hor. Vert.

Mode 1 640 (H) x 400 (V) neg. pos.

Mode 2 640 (H) x 350 (V) pos. neg.

Mode 3 640 (H) x 480 (V) neg. neg.

5.21-3


OCTOBER 1999

z The PC Core video and sync. input to the monitor is applied via the 15-way D-type connector (CN9), mounted on the rear metal work.

SET-UP AND OPERATIONThe monitor is installed in the ATM. A mains voltage is applied to the IECconnector at the rear of the unit. The RGB video and H. and V. Sync. signalsfrom the ATM are applied to the monitor through the 15-way D-typeconnector, both connector screw locks are then locked into place by using ascrewdriver.

With an appropriate trimming tool adjust the brightness and contrast con-trols to give an adequately illuminated display. As the monitor is factoryadjusted, it should not require any further adjustments.

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5.21-4OCTOBER 1999

CIRCUIT DESCRIPTION

GENERALThe monitor comprises a 10 Inch Colour CRT housed in a metal box with theelectronic circuitry mounted on three printed circuit boards, namely:

z The PSU PCB contains the SMPS and automatic voltage sensorz The CRT Tubebase PCB contains the RGB Video Amplifier and the tube-

base drive circuitryz The Deflection PCB which contains the SMPS circuit and the horizontal

and vertical sync. polarity sensors, horizontal and vertical deflection cir-cuits and the diode modulator circuit for E-W pincushion correction.

The illustration below is a simplified block diagram of the monitor. Theprinciple parts of the block diagram are:

z RGB Video Amplifierz SMPSz Horizontal Deflection Circuitz E-W Diode Modulatorz Vertical Deflection Circuit.

Colour Picture TubeA high resolution 10 inch CRT is used for this monitor. It is a shadow masktype with in-line guns and a triad configuration of the shadow mask holes andthe phosphor trio dots on the screen. The deflection unit and the tube arematched into a self-aligned package.

The anode voltage EHT is 20 kV while the focus voltage Vg3, applied onG3, can be from 5.3 kV to 6.1 kV. Screen grid G2 voltage, Vg2, of approxi-mately 550 V is applied to G2 for the correct R, G, B cut off levels. This voltageis derived from a potential divider network connected to the ET supply toobtain a stable voltage with respect to the cathodes and G1 under all load con-ditions. G1 is used for brightness control and for horizontal and vertical blank-ing. Beam current limiting is applied to the CRT circuit via the RGB videoprocessing device IC201 (LM1203). The cathodes are driven from the RGBamplifiers and the heater voltage of 6.3 V RMS, derived from the line outputtransformer, is applied to the filament of the tube.

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OCTOBER 1999

RGB Video Amplifier/TubebaseAnalogue RGB signals of 0.7 V peak-to-peak level are applied to pins 1, 2 and3 respectively, of the 15 pin high density D-type connector, CN9. The RGBsignals are then fed to IC201 (LM1203) though CN201 pins 5, 3 and 1respectively. The input impedance for the RGB signals is 75 ohm given byVR203 and R204, VR202 and R205, VR201 and R206, each preset resistorcontrolling the overall gain of its respective amplifier.

IC201 RGB input pins 9, 6 and 4 contain three clamp gated transistor cir-cuits TR203, TR202 and TR201 which allow the monitor to display a bright-ness level when CN9 (15 way D-type connector) is disconnected. The LM1203(IC201) is a wideband video amplifier device containing three matched videoamplifiers, each video amplifier containing a gain set or “Drive” node for set-ting maximum video channel gain. External HF compensation to this IC beingapplied to pins 18, 22 and 27. Further features of this IC being three gated dif-ferential input black level clamp comparators for brightness control and three

110/240 Vac~

MAINSFILTER

COMPONENTS

D45 — D48 PWMSMPS

IC9TEA2019

&TXFMR

T4

89Vdc

21Vdc

12VdcAVS

PVMREGULATOR -ve

Flyback Pulse

DC ADJ

VR13

PSUGND

GND

PSU pcb

CN7

P4

P5

P1 GND

P3

P2

GND

FAN

CN4

CN8

Video CascodeOutputs

R — TR13-TR14G — TR17-TR18B — TR9-TR10

Black LevelAdjustment Presets

R—VR205, G—VR206B—VR204

RGB

CN201

VideoPre-amplifier

IC201

RGB Gain Adjustment

VR203, VR202, VR201

R

G

B

1

35

130 VdcG1 G2

FOCUS

EHT 25kV

HEATERS

DEGUASSCOIL

Contrast Input

& BCL

ContrastClamp BCL

1

2

3

4

5

6

7

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9

10

11

12

13

14

15

V. SYNC

H. SYNC

SYNC POLARITYSENSOR

IC274HCT86

VERTICALTIMEBASE& DRIVE

IC6 TDA1675

SET HEIGHT480400350

TR13 TR14/15

V. SYNC

VERT. LIN17V

CN2

HORIZONTALTIMEBASE

IC8LM1391

HORIZONTALDRIVE

TR5 & T2

HORIZONTALOUTPUT

TR2HORIZ.

OUTPUTTXFMR

T3

BRIGHT.

31.5 kHz

HOR. FREQ.

SCAN COILS

E-W MOD.IC7

TDA8145TR6,TR12,

TR1, T1

R38

VERT.SHIFT

E-W TRAP

WIDTH

E-WPINVR15

VR17

VR20

VR18

VR16

VR10

VR5VR4VR6

VR11

LINE & FIELD

BLANKING

C57

PLL FLYBACKPULSE

Flyback Pulse

VR7HOR. PHASE

VR19

CONTRAST

CLAMP

BCL

VGA VideoInput CN9

12V89V

GND

Flyback Pulse

89Vdc21Vdc12Vdc GND

CONT.

-ive CN11

LVGND

4532

CN5

P1

1

2

3

130V HTRS G189V 12V


5.21-6OCTOBER 1999

matched attenuator circuits for contrast settings. The contrast dc voltagebeing applied externally from the Deflection PCB Contrast Control to pin 12 ofIC201 via R220. Beam current limiting from the Deflection PCB line outputtransformer T3 is also fed to IC201 via TR205, TR219 and associated circuitryproviding pin 12 (Contrast Control input) with an interactive pull down.

The low impedance RGB output drives from IC201 are fed to their respec-tive CRT cathodes via three video amplifier drive circuits configured in cas-code mode, these being as follows:

z TR213, TR214 and associated circuitry providing the “R” video cascodeamplifier drive

z TR217, TR218 and associated circuitry providing the “G” video cascodeamplifier drive

z TR209, TR210 and associated circuitry providing the “B” video cascodeamplifier drive.

The three identical video cascode amplifiers for the R, G and B signals aredeveloped with a maximum output swing of 50 V peak-to-peak black to whiteto drive the CRT cathodes. The supply voltage of 89 Vdc for the RGB videooutput stage is obtained from the Deflection PCB. Each amplifier stage con-tains a Black level adjustment preset (VR205-R, VR206-G and VR204-B) witha 30 V shift adjustment capability to its respective cathode. One side of thepresets is taken to an externally supplied 130 Vdc through a 10 k ohm pull upresistor to provide the black level range setting.

R270 sets the correct voltage across the heaters at the given current.

Switch Mode Power SupplyThe monitor employs a Switch Mode Power Supply (SMPS) located on thePSU PCB to generate three primary dc supplies namely:

z +89 Vdc for the horizontal deflection circuitz +21 Vdc for the vertical deflection and E-W correction circuitsz +12 Vdc for the small signal circuits.

The SMPS uses a current mode switching power supply control circuit IC9(TEA2019) and associated components which offers the following main fea-tures:

z High stability regulation loopz Automatic input voltage feed-forward in discontinuous mode flybackz Current limitationz Full overload and short circuit protectionz Thermal protectionz Synchronisation capability with internal PLL.

The monitor features an Automatic mains Voltage Selector (AVS) compati-ble with 50 Hz and 60 Hz mains frequencies. The AVS is capable of operatingon two mains frequency ranges, these being either 110 VRMS (88 Vac - 132Vac) and 220 VRMS (176 Vac - 276 Vac). Mains voltage applied through themains RFI suppression filter is full wave rectified by diodes D45 - D48, and fil-tered accordingly by C75 and C76. Start-up voltage to IC9 pins 3 and 2 isapplied via R91 and R100.

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OCTOBER 1999

The power switch transistor TR10. is directly driven from pin 1 of IC9through the base resistor R90. R92/D39 network is used as a damping circuitand the dv/dt circuit is formed by C74, R95 and D44.

The voltage developed across R94 is fed back to IC9 via R84 and is usedfor current mode control and overload protection. D49 and D54 provide protec-tion against over dissipation of R94 in the event of TR10 failure.

The switch mode transformer T4 winding (13-15) provides the supply volt-age of IC9 through the rectifier filter network of D38 and C73.

The secondary voltage stability and adjustment of the 89 Vdc is providedby sourcing the voltage from the 13-15 winding of T4 and feeding the rectifiedvoltage through D50, C70 network to pin 6 of IC9. VR13 (SET B+) adjusts the89 Vdc output. The winding 13-15 of T4 also provides the demagnetisationsensing of T4 which is applied to pin 5 of IC9 through R89.

The demagnetisation circuit within IC9 disables any new conduction cycleof the transistor TR10 as long as the core is not completely demagnetised. Toprevent the switching characteristics of the power supply giving rise to inter-ference on the screen, the power supply is synchronised to the horizontal fre-quency of 31.5 kHz by applying a horizontal flyback pulse from a single turnaround the core of Line Output Transformer (LOPTx) T3 to pin 7 of IC9.

The PLL output (pin 8) supplies a correction current to pin 9 through anexternal resistor R81 so as to maintain the oscillator at the correct frequency.R79, C71 form the RC network to determine the frequency of the oscillator ofIC9.

The 89 Vdc rail is obtained from the secondary winding 4-6, through recti-fier and filter network of D36, L3, C62 and C63. The 21 Vdc is provided by therectifier and filter network of D35, L2, C60 and C58.

A 12 Vdc rail is obtained through rectifier and filter network D34, L1, C61and C59.

Dual PTC resistor, PTC1, provides a decreasing ac magnetising currentthrough the degauss coil (mounted on the CRT) after switch on. The device issuitable for either 115 Vac or 240 Vac operation. At power switch on, the PTCresistor causes a diminishing 50 Hz/60 Hz degaussing current which removesremnant magnetism from the CRT. The second part of the PTC will keep thefirst hot. Residual current in the degaussing coil is minimised in this way, oth-erwise a slight picture wobble would remain.

Horiz. and Vert. Sync Polarity CircuitIC (74HCT86) works as a horiz. and vert. sync polarity sensor. The device is ahigh speed C-MOS TTL compatible input 4-gate EX-OR chip, all its externalinputs from CN2 are flashover protected by diodes to ground or a 5.1 V rail.Horiz. sync output from pin 6 remains negative with either negative orpositive input horiz. sync from the PC Core through CN2. Similarly, the vert.sync output from pin 11 remains positive independent of the sync polarity thatPC Core feeds in.

The PC Core can supply three possible mode settings of sync. which caneffect the “SET HEIGHT” circuit, these being, 480 lines (mode 3), 400 lines(mode 1) or 350 lines (mode 2). The latter two modes requiring the addition ofVR4 or VR6 being added in parallel with VR5 circuit. This requires the gatingof the appropriate transistor TR14 or TR13, these being also controlled byIC2.


5.21-8OCTOBER 1999

The sync. output on pin 3 changes from positive to negative when theinput horiz. sync polarity is positive, this increases the positive charge on C3,hence TR13 will now conduct enabling the 350 line height setting. To enablethe 400 line height setting the sync.output on pin 8 goes positive when theinput vert. sync polarity is positive, effectively discharging C2, switchingTR14 off and TR15 on. The RC networks R6, C3 and R5, C2 provide each ofthe time constants for the gating voltage.

Horizontal Deflection CircuitThe negative going horizontal sync. signal is applied to pin 3 of IC8 (LM1391).A phase control loop compares of the phase of the incoming horiz. sync pulseswith the oscillator. The free running frequency of the oscillator is set at 31.5kHz and adjusted by VR11. A second control loop compares the phase of theoscillator and the horiz. flyback pulse applied from the heater winding of theLOPTx to pin 4 (IC8) via C40, VR7 (HORIZ. PHASE), C39 and its associatedintegrated circuit components.

The horizontal drive voltage developed at pin 1 of IC8 is applied to thedrive stage TR5 and the associated driver transformer T2. The pulse switch-ing mode between drive and output stage is a reverse polarity type to simplify,when horizontal drive transistor TR5 is conducting, the horizontal outputtransistor is switched off. To reduce high voltage peaks on TR5 collector D21,C34 and R40 are connected across the primary of T2.

The Line Output stage provides the following:

z Line Scan currentz Brightness, Contrast, A1 (G1), Focus, EHT dc potentialsz CRT heater supplyz 130 Vdc railz E-W pincushion correction.

The horizontal drive from T2 driver transformer switches the output tran-sistor TR2 base via R33 current limiting, the storage charge on TR2 base isremoved through D20. This particular line output transistor has an internalefficiency diode that reduces dissipation in the diode modulator diodes D51 -D53. Line flyback tuning of the scan coils is performed by C46 - C49. CapacitorC50 provides the “S” correction (controlling symmetrical linearisation). T5auto transformer is fitted to suitably adapt the basic LOPTx design to drive a10 inch CRT.

The horizontal scan coils (H YOKE) have a saturated horizontal linearitycontrol L9 in series with them which are adjusted to correct for asymmetricalscan non-linearities due to the resistance of the scanning circuit. C45 and R55provide damping of the linearity control coil to avoid ringing. D53, D52 andD51 are part of the diode modulator circuit (which is described in the followingsub-section). T1 is the modulation coil which accomplishes the modulation ofthe horizontal deflection current for E-W raster correction.

The supply voltage of 89 Vdc is decoupled by C55 prior to being connectedto primary winding of the LOPTx. This LOPTx, T3, incorporates a diode splitwinding for generating the EHT of 20 kV, the unit also contains an integralbleed resistor/capacitor combination to improve EHT regulation. From thebleeder resistor network two potentiometers provide the necessary focus andA1 (G2) voltages. The bleeder resistor network also discharges the CRT afterswitch off (for safety and reduction of spot burn-in).

5.21-9


OCTOBER 1999

Two auxiliary voltages are generated by rectifying the flyback pulsessourced from T3, for example, a positive rail (+130 Vdc) for the video amplifier,and a negative rail (-130 Vdc) to feed the brightness control circuit (VR20).Horizontal and vertical flyback blanking pulses are applied to the G1 voltagevia TR7, C57 and associated components. The heater winding feeds the Video/Tubebase PCB to supply the heater volts to the tube heater pins, a tap fromthis point also feeds the horiz. flyback pulse to IC8 pin 4 part of the phase loopcircuit.

To avoid over driving the picture tube a beam current limiter is used. Acorrection signal is developed across R70 located at the “cold end” of the EHTwinding (pin 7 of T3). This signal is proportional to the EHT current and is fedvia the BCL connector to the Contrast Control input of IC201 on the RGBVideo/Tubebase PCB.

Diode ModulatorThe deflection coils have been designed to obtain good raster geometry at thetop and bottom edges (N-S), but in the E-W direction approximately 6%correction is required. The diode-modulator circuitry provides dynamiccorrection by modulating the horiz. scan current with a parabola at thevertical frequency rate. The adjustment of the dc working point of this E-Wcontrol circuit sets the picture width.

The vertical current flowing through R38 (the sense resistor) develops asawtooth voltage across it, this signal is fed into IC7 via R74 and R36. (IC7generates the sawtooth into a parabola). A tilt is introduced to the parabola byVR18 (E-W Trapezium preset) injecting a small amount of dc current into pin1 of IC7. Adjustment of VR18 allows some correction of E-W trapezium distor-tion, this being due to small inaccuracies within the scan coils.

IC7 (TDA 8145) is a semi-conductor device specifically designed for E-Wcorrection of displays. Output from IC7 pin 7 feeds TR6 (Inverting Amplifier)base with a parabola at field rate, the amount of parabola is controlled by theE-W Pincushion control VR15. The parabola on TR6 collector is a.c. coupled tothe base of TR12. TR12 and TR1 (emitter follower darlington pair) effectivelychange the impedance of the circuit across C43. This alters the drive currentinto T1 (E-W loading coil), hence, providing corrective feed currents to theHoriz. Scan coils.

Adjusting VR17 (WIDTH) control shifts the d.c. operating point throughT1.

Vertical Deflection CircuitThe function of this circuit is to generate a sawtooth or ramp current to beapplied to the vertical yoke to produce vertical scanning in synchronism to theexternal synchronisation pulses applied to the monitor. This is performed byIC6, TDA 1670, which incorporates the following functions:

z Synchronisation circuitz Precision oscillator and ramp generatorz Power output amplifier with high current capabilityz Flyback generatorz Precision blanking pulse generatorz Thermal shutdown protectionz CRT screen protection which blanks the beam current in the event of loss

of vertical deflection current.


5.21-10OCTOBER 1999

Vertical negative sync pulses are applied to pin 5 of IC6 from IC2 via R21,R22 and C24 network. The oscillator frequency is determined by the RC net-work of R18, R19 and C23.

A supply voltage of 21 V is applied to pin 14 through the filter network ofR28, C17 and C16. C21 is the flyback capacitor which connects the output ofthe flyback generator, pin 15 to pin 2 which is the supply voltage of the poweroutput stage.

During the trace time the supply voltage is obtained from the main supplyvia D14, while during the retrace time, pin 2 is supplied from the flyback gen-erator. The output of the power amplifier is pin 1 and drives the vertical wind-ings of the yoke. Pin 12 is the inverting input of the amplifier. The networkR27, R24 defines the dc level across C25 so allowing a correct centring of theoutput voltage. The series network of R25 and C19 in conjunction with R24and R27 apply, at the feedback input pin 12, a small part of parabola availableacross C25 and the AC-feedback voltage taken across R26.

For the vertical shift, a dc current is injected at the “cold” side of the verti-cal coils. This is obtained by means of TR3 and TR4 and associated circuitrywith VR16 working as the Vert. Shift. The linearity control VR10 is obtainedby applying a feedback between the output of the buffer stage, pin 10 and thecentre tap of capacitors C28 and C27. The latter is connected to pin 9 which isthe input of the buffer stage.

Vertical Height is adjusted by VR5 for the MODE 480 lines (60 Hz). Verti-cal height compensation for MODE 350 lines and MODE 400 lines, VR6 andVR4, respectively. These controls are adjusted when transistors TR13 and net-work TR14/TR15 are switched on by two of the exclusive “OR” gates in IC2. Itmust be noted that VR5 MUST be adjusted first before adjusting VR4 andVR6. Vertical blanking is obtained from the output of the vertical blankinggenerator, pin 13 and summed with the horiz. blanking at the base of TR7.

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OCTOBER 1999

ERROR CODES AND DIAGNOSTICS

LEVEL 0 DIAGNOSTICSThere are no level 0 diagnostics.

LEVEL 1 DIAGNOSTICSThe level 1 Graphics/Video diagnostics tests enable the monitor to be testedand calibrated.

The tests available are as follows:

z Linearityz Colour Blocksz B/W Blocksz Contrastz Beep.

With the exception of the Beep test, all the tests can be cancelled by select-ing the CNCL option. Looping is only allowed on the Beep test.

Linearity TestWhen the Linearity test is selected a full screen picture is displayed on theCRT.

Colour BlocksThe Colour Blocks test is used to verify the overall graphics colour quality anddisplays colour bars on the CRT.

B/W BlocksThe B/W Blocks test displays four alternate black and white blocks on theCRT.

ContrastThe Contrast test displays a white screen and black border, and is used to setup balance, brightness and tint.

BeepThe Beep test emits a beep tone.

ERROR REPORTINGThere is no error reporting applicable to the CRT.

STRAPPINGThere is no strapping associated with the CRT.

FUSESFuse F3 is located just to the right of the power input connector on the rearplate and is rated at 3.15 A, 250 V.


5.21-12OCTOBER 1999

MONITOR DISASSEMBLYThe colour monitor assembly is shown below. The monitor is factory adjustedand tested.

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VR5

VR6

CN

3

IC2

VR1

VR11

VR7

CN

1

L6

TR13

TR12

TR11

SW1

L5

CN

V

CA

& G

- C

IS M

D10

/P-0

0

T3

CN

4

J2

LIN

EA

TE

RR

ANE

UT

RO

CIS

MD

/P-0

0

TR

20 IC5

VR

12

D30D

28

NO

T M

AIN

S I

SO

LA

TE

D

IC4

D56D

55

D54

C91

D29

D3122

0

110

TR

16D26

D25

J3

D22

D23

D24

CO

M

EG

DF

HB

C

R32

R31

R38

R30

R39

TR

9

R33

R34

R41

R40

LP3

TR

8

A F

LP1

LP2

C20

C21

C18

D3 C19

C17

L2

R36

D4

FOCUS

R37

TR

10V

R13

R45

R43

R44

R46

R13

4

R42

R35

C16

TP

12

CR

T

15-W

AYC

ON

N

PS

U

pcb

CR

T

BR

AC

KE

T

TU

BE

BA

SE

SC

AN

CO

ILS

DE

FLE

CT

ION

pcb

IEC

CO

NN

.

TOP

CO

VE

R

HA

ND

LE

EH

T

LH S

IDE

PA

NE

L

RH

SID

E

PAN

EL

MA

IN C

HA

SS

IS

5.21-13


OCTOBER 1999

SafetyRead the following safety notes carefully before attempting to service themonitor.

The Deflection PCB, generates extremely high voltages for the CRT, inparticular:

z 20 kV for the final anodez About 4.8 kV for VG2.

Great care must be taken when handling this module.

WARNING

The CRT anode retains a potentially lethal voltage even whenthe monitor is turned off. The following procedure mustALWAYS be observed prior to disconnection of the EHT cap orany other task which requires the CRT to be handled:1. Connect a clip lead or heavy gauge wire to the chassisground.2. Connect the other end to the shaft of a flat blade screw-driver that has an insulated handle.

3. Keeping well clear of both the wire and the screwdrivershaft, insert the blade of the screwdriver under the EHT capand make contact with the anode terminal. Depending on theamount of charge present on the anode, a distinct snap may beheard as the CRT discharges.


5.21-14OCTOBER 1999

It should be noted that despite correct performance of the CRT dischargeprocedure, the CRT bulb capacitance can accumulate charge as the dischargestresses are relaxed. It follows, therefore, that ELECTRIC SHOCK HAZARDIS EVER PRESENT WHEN HANDLING THE CRT.

The following guidelines must always be observed:

z Do not dispose of the CRT by breaking the bulb unless wearing safetyglasses and protective clothing

z If it becomes necessary to remove the CRT from its mounting within themechanical package of the monitor, under no circumstances apply lever-age to the glass bulb

z Never apply pressure or leverage to the tension band which may displaceit from its initial position. This will minimise the implosion protectionafforded by its presence.

NOTE: Before opening any part of the monitor, switch off the unit by remov-ing the mains voltage cable from the IEC connector.

The monitor includes critical mechanical and electrical parts which areessential for X-radiation safety. Replace all critical components (marked witha “!”) only with the exact replacement parts named in the Parts IdentificationManual.

Removal of the Top CoverThe top cover is taken off by removing the 4 x Taptite screws that locate withthe monitor side plates. The RHS (viewed from front) metal plate contains theDeflection PCB and is secured to the Main chassis by 3 x Taptite screws. TheCRT brackets are held in place by 8 x Taptite, 4 located either side of themonitor.

Removal of the CRT

1. Switch off the monitor.2. Remove the IEC connector from the monitor, now remove the male connec-

tor retaining screws from the rear plate. The board mounted IEC maleconnector is now free to be moved with the Deflection board.

3. Remove the top cover by unscrewing the 4 x Taptite screws.4. Unscrew the 3 x Taptite screws on the metal plate containing the mounted

Deflection PCB, lie it down in a safe position by the side of the monitor.5. Remove the Tubebase PCB, from CRT base. Remove the CRT ground wire,

connected to the CRT braid, from the Tubebase PCB.6. Disconnect the degaussing coil by removing the connector from it7. Remove the EHT cap from the anode of the CRT, MAKING SURE to dis-

charge the anode.8. The front plates retaining the mounted CRT are then removed by

unscrewing the 8 x Taptite screws, 4 located on each side of the right andleft hand plates. Make sure to hold the front plate when unscrewing.

5.21-15


OCTOBER 1999

9. The front plate assembly with the CRT is placed on a bench with the CRTscreen facing down, making sure to have a soft protective materialbetween the screen and the bench to avoid damage or scratches to theCRT.

10. Remove the CRT by unscrewing the 4 x M5 hexagonal standard nuts andwashers. If the four inner platform nuts are required for the replacementtube, fit them before reassembly takes place as they are required for posi-tional adjustment of the tube.

Reassembly of the CRTThe CRT is reassembled by following the procedure in reverse to thatdescribed above.

Removal of the Deflection & RGB Video Amp/Tubebase PCB'sSince two of the PCB's are soldered together, i.e. the RGB Video amp./Tubebase PCB, both boards are removed still attached together.

1. Switch off the monitor.2. Remove the ac Line (Mains) IEC connector from rear of the monitor.3. Remove the rear plate panel mounted IEC connector retaining screws, the

connector should now be free to be moved with the Deflection PCB.4. Remove the top cover. Disconnect the PSU PCB from the Deflection PCB

by removing connector CN1 from the Deflection PCB. Remove PSU PCBfrom its stand offs if required, this may require unscrewing the metalplate on which it is mounted.

5. Unscrew the 3 x Taptite screws on the metal plate containing the mountedDeflection PCB, lie it down in a safe position by the side of the monitor.Remove the Deflection PCB from the side plate by pulling the PCB awayfrom the stand off's retaining it.

6. Remove the RGB Video amp./Tubebase PCB from the CRT base. Removethe CRT ground wire connected to the CRT braid, from the RGB Videoamp./Tubebase PCB.

7. Remove the EHT cap from the anode of the CRT MAKING SURE to dis-charge the anode.

8. Disconnect:z the degauss lead from connector CN4 on the Deflection PCBz the scan coils from connector CN5 on the Deflection PCBz the sync. V & H connector from CN2 on the Deflection PCBz the DC fan from connector CN8 on the Deflection PCBz RGB input drive from connector CN201 on the RGB Videozz amp./Tubebase PCB.

The above assumes a complete PCB replacement without desoldering andthat during manufacture both items will be connected together and have beentested.

Replacement of the PCBs is a reversal of the procedure above.


5.21-16OCTOBER 1999

COMPONENT LAYOUT DIAGRAMS

Deflection PCB

5.21-17


OCTOBER 1999

PSU PCB


5.21-18OCTOBER 1999

Tubebase PCB (Front View)

5.21-19


OCTOBER 1999

Tubebase PCB (Rear View )


5.21-20OCTOBER 1999

SET-UP AND ADJUSTMENTSIn the event of repair and/or revision to the monitor, it is necessary to followthe adjustment procedure as described below.

NOTE: The adjustable parameters are to some extent interactive and it maybe necessary to repeat sections of the procedure to obtain optimum results.

Test EquipmentTo carry out the adjustments, the following equipment will be required:

z Digital multimeter to measure up to 2 kVdcz Quantum colour character generator model 801C or PC with suitable soft-

warez TV colour analyzerz Frequency Counter to measure the 31.47 kHz for Horiz. Freq. testz Non-inductive screwdriver for horiz. linearity adjustment. Insulated

screwdriver for other adjustmentsz Digital EHT meter (high impedance) to measure the A1 control voltsz 115 Vac and 240 Vac 50/60 Hz mains sourcez Degaussing coil.

Set-up of the Character GeneratorThe Quantum character generator is set up to obtain the following data:

MODE 1 640 X 400

Horizontal Vertical

Dots/char 8 Lines/char 12

Tot char 100 T lines/char 453

Dispd char 80 Dispd rows 32

Drive delay 82 Drive delay 34

Drive width 12 Drive width 9

Hz 69 48

KHz 31 475

MHz 25 176

Hor sync - ve

Vert sync + ve

MODE 1 640 X 350

Horizontal Vertical






Hz 69 47

KHz 31 475

MHz 25 176

Hor sync + ve

Vert sync - ve

MODE 1 640 X 480

Horizontal Vertical

5.21-21


OCTOBER 1999

The three modes of operation are obtained by running the diagnostic testsfor the monitor giving the appropriate displays.

Test patterns required: (using the Quantum generator 801C.)

z Cross hatch pattern 9 vert. x 9 hor. linesz Full white page or white square of approx. 65 mm x 65 mm (1.77 in. x 1.37

in.) at centrez Colour barz Full page of “H” characters.






Hz 59 95

KHz 31 475

MHz 25 176

Hor sync - ve

Vert sync - ve

MODE 1 640 X 480


5.21-22OCTOBER 1999

AdjustmentsThe interconnection assembly diagram below, shows all the adjustable devicesand their locations on the PCB assemblies.

VR17 WIDTH

TR1

VR18

E-W PIN

C518

VR15

TR6

TR12

E-W TRAP

TR3

C17

C25

C19

VR10TR13

TR15

TR14

V LINVR4

M1 400VR6

M2 350VR5

M3 480

VR11H FREQ

IC8IC5

IC7

C41

C20

DZ2

D15

D17

D19

D18

C42

DZ4

C2

C3 D9D8

D7D6

+12V

T1

R10

4

C43

C47

C46

C49

C48

D53

D52

D51

TR2

T5

R56

C50

V SHIFT

VR16

L9H SHIFT

C45

C26

CN5

TR4

C21 TR5

C22DZ6

+89V

CN1

DZ5

HOR

C34D21

T2B

VR7

D22 C36

H POS

C33

C5

C52

HTRS CLAMP

D10D32

D25

DZ9

D29

TR7D30DZ7D28D27

C57 C53

G1C54

CONT

CO

NT

RA

ST

BR

IGH

TN

ES

SVR20

VR19C55

C86

D31 D1

BCL

+130V

C80T3

CSSKCD10 - SB01-A

R33

D20

IC2IC6

DAG A1-G2 G1

+89V

VR204

C236

C226L201

C233

TR210

TR214 TR218

VR206

C219 C234C235

C224

VR205

C225

L202

R246

R238

R232

R245

CN202

R243

R242

130V

R235

R236R234

R270

H

R233C233

RT

R237

12V

CLAMP

P1C211

CD10CSSK

TB01

BCLCN201

VR203

C203

C212

C205

VR202

C202

VR201

C201

IC201

L203 R240

R239

R248

R249

R268R269

SG201

N/C

KB

H1H2

KR

G2

KG

G1

N/C

L1

L2

D35

C61

C60

C58

C59

C89

CN8

P2

P5

F3

C63

R107

P4

P1P3

SCANCOILS

D34

D36

CN7

C78

C84 C82

C83 C81

L8 C77

C76

SCR1

C75

D45

D47

D48 D46 R305

R96

R97

D40 D54

D43

D42

D41 D49

R94

R95D44

TR10

R93

R85

R90

R92

R391

18

T4

C62

C79 C80

CD10 - PS02-ACSSK - FN21 11-7-94

VR13

C88

C70 D50

R87

R88R106

C85

R86

IC9

F-PULSE

R89

C72

R83R78

C69C68

C65

C71

R79R81-ive

PTC1

R99

R300

R301

R91

R84

IC9C300

C301

C73

R304

D300

R303

CN4

C74

SIGNAL INPUT, VERT. & HOR. SYNC INPUTS FROM

15-WAY CONNECTOR

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

PSU PCB

FAN

DEGUASS

TUBEBASE PCB

DEFLECTION PCB

15-WAY INPUT

CRT

EHT

DAGEARTH

DEGUASS COIL

IC201

5.21-23


OCTOBER 1999

The metal plates diagram below shows the locations of the controls andthe connectors.

The monitor is powered up by applying 115 Vac or 240 Vac mains to theIEC connector.

Apply Cross hatch test pattern signal, MODE 3 (640 x 480) to the 15 pinD-type connector of the monitor.

Fig. 3.1 Top View with Cover Removed

Fig. 3.3 Right Hand Plate and Adjustments

PSUPCB

TUBEBASEPCB

SIGNALINPUT

DEFLECTIONPCB

FAN

GAINADJUST

BLACK LEVELADJUST

IECCONNLINE

INPUT

CRT

V LIN

M1 400

M2 350

M3 480

H FREQ

H POS

V SHIFT

E-W TRAP H LIN

E-W PIN

WIDTH

FOCUS

Fig. 3.2 Rear Plate

CONTRAST

BRIGHTNESS

SIGNALINPUT

SCREW LOCKS

LINEINPUT

240V

110V

IECCONN

15-WAYINPUTCONN

LOCKINGNUTS

CONTRAST

BRIGHTNESS

FUSE

115/240Vac

MODEL/B Ser

CD10012XX

Rear Plate

Top View with Cover Removed

Right Hand Plate and Adjustments


5.21-24OCTOBER 1999

Supply Voltage (+89 Vdc) AdjustmentThe +89 Vdc Supply Control VR13 is location in the SMPS circuit onDeflection PCB.

1. Remove the top cover as previously described.2. Connect to a mains source and switch on the Monitor.3. Connect the positive terminal of the digital multimeter to TP7 and the

negative terminal to GND.4. Set BRIGHTNESS and CONTRAST controls to minimum.5. Adjust VR13 to give +89 Vdc ± 1% on the digital multimeter.

Warm UpThe monitor is allowed to warm up for 20 minutes before making anyadjustments. If the monitor is switched on from “cold”, then its automaticdegaussing system will demagnetise the CRT. If the monitor is powered upfrom its “warm” state and has been moved around, an external degaussing isrequired.

Set the Contrast and Brightness controls (located on the Deflection PCB)to obtain a typical display.

If components have been changed that effect the display illumination thenall the RGB Video amp./Tubebase potentiometers will require setting to mid-scale. However, if no changes to the display illumination have been made thenadjustment of RGB Video amp./Tubebase potentiometers will not be required.

Horizontal Frequency AdjustmentThe H. FREQ. Control VR11 is location on the Deflection PCB.

1. Connect the Frequency Counter terminals between the heater resistorR270 and GND.

2. Adjust VR11 until 31.47 kHz is displayed on the Frequency Counter. Oncompletion, remove the Freq. Counter connections.

Vertical HoldThis adjustment is not required because the V. Hold is automatically set bythe timing components connected between pins 4 and 6 of IC6.

Horizontal Phase/PositionThe H. POS Control VR7 is location on the Deflection PCB.

1. Set the Horizontal Phase/Position control (VR7) to its mechanical centre.2. Adjust VR7 to have the image at the centre of the screen (see diagram

below).

5.21-25


OCTOBER 1999

E-W CorrectionThe E-W PINN Correction Control VR15 and the E-W TRAP Control VR18 areboth location on Deflection PCB.

VR15 corrects the side pincushion effect (curved or bowed edges of the dis-play). VR18 corrects the trapezoidal effect. Adjust VR15 and VR18 for straightleft and right hand sides of the picture.

Horizontal LinearityThe H. LIN. Control L9 is located on the Deflection PCB.

Using the cross hatch pattern adjust L9 until the corresponding verticalcolumns of the cross hatch test pattern has (as near as possible) equal width.This is measured along the centre part of the screen. Use a non-inductivescrewdriver.

Horizontal WidthThe WIDTH Control VR17 is located on the Deflection PCB.

Adjust VR17 so that the horizontal size of the display measured along thecentre of the screen (assuming that the side pincushion distortion is adjusted)is 180 mm ± 2 mm (7.08 in. ± 0.078 in.).

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5.21-26OCTOBER 1999

Vertical LinearityThe V. LIN. Control VR10 is located on the Deflection PCB.

Ensure that MODE 3 (640 x 480) signal is applied. VERT. LIN. control,VR10, is adjusted to obtain (as near as possible) equal heights of the horizon-tal rows of the cross hatch test pattern at the upper and lower halves of thedisplay.

NOTE: The Vert. Lin. is interactive with Set Height (480) and Vert. Shift.Therefore, these controls may need readjustments.

Set Height (480 Lines) MODE 3The set height (M3 480) Control VR5 is located on the Deflection PCB.

1. Apply MODE 3 (640 x 480) signal.2. Adjust VR5 so that the vertical size of the display, measured along the cen-

tre of the screen, is 130 mm ± 2 mm (5.11 in. ± 0.078 in.).

Vertical ShiftThe V. SHIFT Control VR16 is located on the Deflection PCB.

Adjust VR16 to have the display vertically (as close as possible) centred onthe screen.


1. Apply MODE 1 (640 x 400) signal to the monitor.2. Adjust VR4 so that the vertical size of the display measured along the cen-

tre of the screen is 130 mm ± 2 mm (5.11 in. ± 0.078 in.).


1. Apply MODE 2 (640 x 350) signal to the monitor.2. Adjust VR6 so that the vertical size of the display measured along the cen-

tre of the screen is 130 mm ± 2 mm (5.11 in. ± 0.078 in.).

FocusThe FOCUS control is located on the top part of the LOPT T3.

1. Apply signal with full page “H” characters to the monitor.2. Set BRIGHTNESS and CONTRAST to typical display. 3. Adjust FOCUS control for the best overall focus over the entire screen.

5.21-27


OCTOBER 1999

Cut-Off (Black Level), G2 and White Balance AdjustmentThe SCREEN GRID A1 Control is located at the bottom part of the LOPT T3.

z Signal requirements:z All “White” of about 65 x 65 mm size at the centre of raster, mode 640

x 350z Signal input:

zz 0.45 Vpp.

1. Pre-adjust, (all the preset controls are located on Video amp./TubebasePCB)z VR204 - B. BLK. LEVEL to its mid-way travel positionsz VR205 - R. BLK. LEVEL to its mid-way travel positionsz VR206 - G. BLK. LEVEL to its mid-way travel positionsz VR201 - B. GAIN to its maximum travel positionsz VR202 - G. GAIN to its maximum travel positionszzVR203 - R. GAIN to its maximum travel positions.

2. Set BRIGHTNESS and the CONTRAST controls to minimum.3. Connect the digital EHT meter (high impedance) terminal to pin 7 of the

CRT and GND and adjust G2 potentiometer (A1/Screen grid), for 650 Vdc.4. Adjust the BRIGHTNESS control until a raster is just visible. Depending

on the tube, a predominant colour will be displayed, adjust the other twocolour BLK/LEVEL potentiometers to give a grey raster.

5. Set the CONTRAST control to maximum, set the BRIGHTNESS control tominimum.

6. Connect an oscilloscope to TP31 (B), TP32 (G) and TP33 (R) cathodes inturn, adjusting the respective Gain potentiometers VR201, VR202 andVR203 to give a 28 V peak-to-peak video waveform display (black towhite).

7. Set the Colour Pattern generator for Pattern X (pattern 1-1).8. Set the CONTRAST control to mid-position, adjust the BRIGHTNESS

control until the background raster is just below visibility.9. Using the Colour TV Analyzer, adjust the GAIN potentiometers for the

correct colour temperature. i.e., 9300 deg. K (D93 Standard), X-Y co-ordi-nates are X = 0.281 and Y = 0.311.

10. Using the grey video squares of Pattern X displayed on the screen. Checkthe colour temperature again with Colour Analyzer to 9300 degrees K,then if necessary adjust the BLK/LEVEL potentiometers to maintain thecorrect colour temperature.

A certain amount of interaction between GAIN and BLK/LEVELpotentiometers will occur. Repeat steps (9) and (10) above to compromiseand get the best optimum 9300 degrees K results.

11. Switch the Generator to the Full White page (Pattern 2-3). Set the Bright-ness control so that the background raster is just extinguished and adjustContrast to obtain 60 nits, verify with a Luminance Meter.


5.21-28OCTOBER 1999

TROUBLESHOOTINGThe flowcharts in this section are a guide to troubleshooting the monitor.

Tools and EquipmentFor troubleshooting and adjustment of the monitor, the following tools andequipment are required:

z Colour Quantum Character Generator to produce the necessary video andsync. signals. If not available, signal from the PC Core

z 110 Vac 50/60 mains sourcez Digital multimeter to measure up to 2000 Vdcz Dual trace oscilloscope with 10:1 probesz Non-inductive screwdriver and insulated screwdrivers for adjustments

where required.

Safety Guidelines

WARNING

Before servicing this chassis, read “the X-ray radiation precau-tions”, “shock hazard” and “critical components” describedbelow.

X-Ray Precaution The monitor includes critical mechanical and electrical parts which areessential for X-radiation safety. For continued safety, replace criticalcomponents indicated in the manual only with exact replacement parts givenin the parts list. Operating high voltage for this unit is 20 kV at minimumbrightness.

Shock HazardThe high voltage at which the tube is operated may be very dangerous. Themonitor is operated from the mains voltage of 115 Vac or 240 Vac. Therefore,extreme care should be taken in the servicing or adjustment of any highvoltage circuit.

WARNING

The CRT anode retains a potentially lethal voltage even whenthe monitor is turned off. The EHT discharge proceduredetailed in the safety section under the heading “ASSEMBLYAND DISASSEMBLY” must ALWAYS be observed prior to dis-connection of the EHT cap or any other task which requiresthe CRT to be handled

Caution should also be exercised when servicing or handling the PSUPCB, because of the mains voltage and the rectified voltage at capacitors C7and C8.

5.21-29


OCTOBER 1999

Critical ComponentsThe monitor includes critical mechanical and electrical parts which areessential for X-radiation safety. Replace all critical components (marked witha “!”) only with the exact replacement parts named in the Parts IdentificationManual.

No Raster

Check +89 Vdc Rail+21 Vdc, +12 Vdc Rail

Check SMPS PCBRefer to Failure of SMPS

OK

NG

Check HV operation &TR2 collector waveform

Deflection PCB

Check CRT Heaters

NGCheck +89 Vdc on

TP20 of T3

Check:Horz. OscillatorHoriz. DeflectionHV Circuit

Check Screen Grid G2volts approx. 650 Vdc

Check 6.3 Vac RMS on CRT baseCheck R36 on Tubebase PCB

Check CRT Heaters

Screen unit, G2 lead to Tubebase PCB,C226, R268 Tubebase PCB, LOPTx T3 fail

Check +130 Vdc, +89 Vdc and +13 Vdc

OK

NG

OK

TooLow

Measure on the PSU PCBTP7, TP8 and TP9 respectively

on Tubebase PCB

OK


5.21-30OCTOBER 1999

Low or Loss of R, G or B, Raster OK

Abnormal Video on CRT Screen - Too Bright - Too Dark

Check RGB input at TP25, TP26TP26 and TP27

Check for connection betweenPC Core and monitor

OK

NG

Check Video inputat IC201 (LM1203) TR28,

NG

Check RGB at TR207, TR214,TR215 collectors on

Check for clamp pulse at C209,IC201 pin 14.

Check +89 V dcCheck +130 V dc

OK

NG

OK

CRT cathode failure

29, 30 on Tubebase PCB Check TR206 for failure

Check +12 V dcTubebase PCB

on Tubebase PCB

Assuming checks on RGB videoinput and output has been

Check T3, D25, C54, R63,VR20 and blanking circuit

OK

NGCheck Brightness circuitconnected to G1 and -130 Vdc

Check G2 screen grid voltagesetting

CRT failure

OK

NG

OK

done satisfactory (see above)

Vg2 pot unit, C226, R268T3 (LOPTx), CRT SocketCRT

If Vg2 measurescorrect: check

If Vg2 measuresincorrect: check

5.21-31


OCTOBER 1999

No Blanking, Visible Retrace Line on Background Raster

No Synchronization, Horizontal and Vertical

Horizontal

Check Blanking waveform

If no Horz. flyback checkconnection to T3 (LOPTx)

If no Vert. flyback check connectionback to Vert. output stage

Check TR7 and associatedcomponents

Check Horizontal flybackand Vertical flyback at

R39 and R64 on the

Check Hor. and Vert.“Blanking” on collector

of TR7

NG

NG

NG

OK

on G1 Tubebase PCB

Deflection PCB

Adjustable by Horiz.Freq. control VR9 Adjust

Check Horiz. sync. inputTP11 on Deflection PCB

Check Horiz. sync. onTP15 on Deflection PCB

Check synchronizationof input circuit

Check connection betweenPC Core and monitor

Check IC2, R4, C44, R43 and IC8

Check IC8 and associate

NG

NG

NG

OK

OK

OK

Check 5 Vdc on TP10, R7, D6,D8 and IC2 on Deflection PCB

components


5.21-32OCTOBER 1999

Vertical

Abnormal Vertical Height in 480 Line Mode

Check Vert. sync. inputpin 13 of IC2 on the

Check Vert. sync. onpin 5 of IC6 on the

Check Vert. oscillator circuit of IC6

Check connection betweenPC Core and monitor

Check IC6, pins 3 and 4 andassociated components

Change IC6

NG

NG

OK

OK

on Deflection PCB

Check 5 V on TP10, R8, D7,D9 and IC2 on Deflection PCBDeflection PCB

Deflection PCB

Check +21 Vdc rail

Check R28 on Deflection PCB

Check Vert. mode circuitby adjusting VR5

Check Vert. deflectioncircuit section

Re-adjust VR5

Check VR5 and associated

(V. Height 480 lines)

Measured after R28 on Deflection PCB

componentsSee Vertical Mode below

Failure IC6 or associatedcomponents on Deflection PCB/Vert. Deflection Yoke

and +21 Vdc on Deflection PCB

OK

Low

OK

OK

NG

NG

5.21-33


OCTOBER 1999

Vertical Mode

E - W Pincushion Distortion Failure

Poor Focus

Vertical Mode

Check IC2, TR13, TR15 and DZ9

Failure condition

Readjust: VR6 (350 lines)VR4 (400 lines)

To small V. Height at 400 & 350 linesVibrating V. Height

NG

Readjust E-W PIN VR15 and

No field parabola at base of TR6

Field parabola present at TR6 base

NG

E-W TRAP VR18 on Deflection PCB

check IC7 and associated componentson Deflection PCB

Check TR6, TR12, TR1, T1 andassociated components for failure

Readjust Focuscontrol

Focus control unitFocus lead

NG

CRT socketCRT

Failure:


5.21-34OCTOBER 1999

Failure of Switched Mode Power Supply

Check each rail: +89 Vdc on TP7+21 Vdc on TP8+12 Vdc on TP9

Adjust the dc Adjust controlVR13 for +89 Vdc

Low or no output anywhere No +21 Vdc output only

No +12 Vdc output only

Check D35, L2 & T4 21 Vdc winding O/C

Check F13, L1 and D34

Switch off the monitor mains and allow capacitorsto discharge. Isolate PSU by disconnecting the PSUPCB from other PCBs. Insert suitable dummy loadresistor between each rail and GND.Next turn on the power and check the +89 Vdcappears.

Check C55, T3, TR2, D51,

Check that F1 is O/C

Check waveform atD36 anode

Check waveform TP17TR10 collector

Check D36, T4 +89 Vdc

Check D45 - D48, C75, C76 &associated components

Check TR10, IC9 andassociated components

Check C58 - C63 and T4 for SC

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

D52 & D53 on Deflection PCB

with supply rail (TP1)

winding - O/C

5.21-35


OCTOBER 1999

OSCILLOSCOPE WAVEFORMS

CD10012XX COLOUR MONITOR OSCILLOSCOPE WAVEFORMS

ATTENTION !! Measure with Primary Ground of reference all Power Supply Test Points shown above dashed line.

Test Point 1 290 Vdc Test Point 2 9.28 Vdc

Test Point 3 1 Vp-p T = H

Test Point 4 650 Vp-p T = H Test Point 5 4.5 Vp-p T = H

Test Point 7 89 Vdc

Test Point 8 21 Vdc Test Point 9 12 Vdc

Note: Test points 1 to 5 above are measured with reference to the mains primary earth (PSUGND) referto the schematic diagram. All other test points are measured with reference to GND. The test pointsrelating to DC voltages show blank screens with the actual DC voltage shown below the screen.


5.21-36OCTOBER 1999

Test Point 10 5 Vdc Test Point 11 4.4 V p-p T = H

Test Point 12 5.2 Vp-p T = V 0 Vdc

Test Point 13 32.5 Vp-p T = V 1 Vdc

Test Point 14 1.8 Vp-p T = V

Test Point 16 1.7 V p-p T = H

Test Point 17 175 V p-p T = H Test Point 18 17 V T = H

Test Point 15 5.2 V p-p T = H 0 Vdc

5.21-37


OCTOBER 1999

Test Point 20 89 Vdc Test Point 19 1kV p-p T = H

Test Point 21 33 Vp-p T = H -10 Vdc

Brightness Control Range = -90Vdc

Test Point 22 32 Vp-p T = H 3 Vdc

Test Point 23 38 Vp-p T = V

Test Point 25 - 27 500 mV p-p T = V

Test Point 28 - 30 4 V p-p T = V 62 Vdc

Contrast dependant

Test Point 31 - 33 40 V p-p T = V 62 Vdc

Brightness & Contrast dependant

Test Point 24 6.8 V p-p T = V 13 Vdc

Width Setting dependant


5.21-38OCTOBER 1999

Test Point 35 89 Vdc Test Point 34 12Vdc Test Point 36 128 Vdc

Test Point 37 See Test Point 21

5.21-39


OCTOBER 1999

CONNECTOR ASSIGNMENTThere are two connectors on the rear plate of the monitor.

Video and Sync ConnectorVideo and sync data is input to a 15 pin D-type connector on the rear plate ofthe monitor, which has the following pinouts:

Power Input ConnectorPower is input from the IEC connector on the rear plate of the monitor. Thepinout of the connector is as follows:

SCHEMATIC DIAGRAMSThe schematic diagrams of the monitor are shown on the following pages.


5.21-40OCTOBER 1999

Power Supply Unit PCB - Schematic Diagram

5.21-41


OCTOBER 1999

Deflection PCB - Schematic Diagram (Sheet 1 of 3)

50V

47u

F

AE

C1

9

20

%

10

00u

FA

E25V

105

D

C17 20

%

1u

F

AE

50

V

C2

0

20

%

22

0u

F

AE

50V

105

D

C2

1

20%

16

V2200uF

AE

10

5D

C2

5

20

%

25V

10

0u

F

AE

C26

20

%

22

uF

AE

50

V

C2

20

%

47

uF

AE

16

V

C3

20

%

10

0u

F

AE

63V

C5

20%

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

1/4

W1

M0

5%

CF

R4

7

1M

8

CF

1/4

W5

%

R114

4K

7

5%

CF

1/4

W

R2

2

1/4

W2

R2

5%

CF

R2

0

1/2

W47R

5%

CF

R3

2

1/2

W220R

5%

CF

R2

9

1R

5%

CF

1/2

W

R2

6

1/4

W1

20

R

5%

CF

R251/4

W3K

5%

CF

R27

1/4

W2

K4

5%

CF

R2

4

1/4

W1K

5%

CF

R3

5

1/4

W56

K

5%

CF

R23

43

0K

5%

CF

1/4

W

R3

1

4K

7

5%

CF

1/4

W

R1

956K

5%

CF

1/4

W

R1

8

33

0R

5% CF

1/4

W

R21

1K

5%

CF

1/4

W

R8

1K

5%

CF

1/4

W

R7

33

0R

5%

CF

1/4

W

R5

33

0R

5%

CF

1/4

W

R6

33

0R

5% CF

1/4

W

R4

5%

CF

1/4

W1K

R4

3

1/4

W2

20

K

5%

CF

R3

0

1M

CF

1/4

W5

%

R1

11

33

0K

1/4

W

CF

5%

R112

680

R

5%

CF

1/4

W

R1

05

470

K1/

4W

CF

5%

R1

13

47

0K

CF

1/4

W5%R115

50V

100nF

CD

C1

6

20

%

10

0V2

20

nF

MK

S

C2

2

5%

100pF

CD

50V

C18

20%

63

V1

00

nF

MK

S

C2

7

5%

10

0n

F

MK

S

63

V

C2

8

5%

10

0n

F

MK

S

63V

C2

3

5%

50

V1

00

nF

CD

C29

20

%

100

nF

MK

S

63V

C2

4

5%

10

0n

F

MK

S

63V

C4

5%

CN

2

123

22

-27

-20

31

MO

LE

X

BC

33

7T

R3

BC

54

7TR

14

BC

547

TR

13

BC

54

7TR

15

BC

32

7T

R4

123

2

5K

VR

16

PIH

ER

PT

10

V

1 23

21

00

KV

R1

0

PIH

ER

PT10V

123

2

4M

7V

R6

PIH

ER

PT

10

V12

32

220

KV

R5

PIH

ER

PT

10V

123

2

4M7

VR

4

PIH

ER

PT

10V

CN

1

1234522-2

7-2

051

MO

LE

X

5V

11

/2W

DZ

9

3V6

1/2

W

DZ

21

N4

148

D1

6

1N

414

8D

18

1N4

14

8D

19

1N

41

48

D6

1N

4148

D8

1N

414

8D

9

1N

414

8D

7

1N4

00

4D

14

1N

414

8D

17

1N

4148

D15

12

108

97

346

113

11

14

215

5

TD

A16

75

IC6

12

345

6

78

91

0

11

12

13

14

15

12

34

56

789

10

11

12

13

14

74H

CT86

IC2

12

34

56

789

10

11

12

13

14

V4

-3-1

90

GH

S2

ST

AV

ER

1/4

W1

R8

5%

MF

F

R2

8

SY

NC

.HS

YN

C.V

12V

12V

12V

+2

1V

+21V

+2

1V

+89V

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

14

11

10

15

12

13

3 2 1

LV

GN

D

CN

9/1

3C

N9

/14

CN

9/1

0T

O

C

B

A

To Sheet 2

To Sheet 2

To Sheet 2


5.21-42OCTOBER 1999


1uF

AE

50

V

C33

20%

100uF

AE

16V

C42

20%

10uF

AE

100V

C52

20%

GN

D1

E

E

E

E

E

E

E

E

1M

0

CF

1/4W

5%

R71

10

K

5%

CF

1/4W

R7

4

330R

5%

1/4W

CF

R123

220R

1/2

W

CF

R55 5%

10K

5% CF

1/4

W

R36

0R

82

5%

CF

1/2

W

R38

10K 5%

CF

1/4

W

R37

1K 5% CF

1/4

W

R39

470R

5%

CF

1/2

W

R34

470

R

5% CF

1/4

W

R50

3K3

1% MF

1/4

W

R48

68K 5% CF

1/4

W

R4

6

100R

5%

CF

1/2W

R51

3R

3

5% CF

2WR33

4K

7

5%

CF

1/4W

R73

N.F

R54

N.F

.R

56

3K

3

5%

CF

1/4

W

R49

12K

5% CF

1/4

W

R52

1K2

5% CF

1/4

W

R12

4

2K7

5% CF

1/4

W

R45

10K 5% CF

1/4

W

R41

10R

5% CF

1WR10

4

1K

8

5%

CF

1/4

W

R59

22K 5% CF

1/4

W

R60

5K

6

5%

CF

1/4

W

R58

10K

5%

CF

1/4

W

R57

10R

MFF

0W

4

R61

5%

47K

5%

MF

2W

R40

3K

3

5%

CF

1/4W

R44

1K8

5%

1/2W

CF

R125

1nF

1KV MKS

C45 5%

10n

F

MK

S

63V

C30 5%

150pF

CD

50V

C41

20%

33n

F

MK

S

63V

C39

5%

100n

F

CD

50V

C37

20%

470

nF

MK

S

63V

C32

10%

1nF MK

P

1K6V

C47 5%

820nF

MKP

250V

C50

5%

5n6F

MKP

1K6V

C49

5%

12nF

MKP

1KV

C48 5%

100nF

MK

S

63V

C40

5%

3n3

MKS

100V

C38

5%

4n7

MK

S

630

V

C36

5%

1nF

MK

P

1KV

6

C46 5%

2n2

CD

50V

C44

5%1

u5

MKS

63V

C51

5%

3u3

MKS

100V

C43

10%

100n

F

MK

S

400

V

C34

5%

BC

337

TR

6

BU

H515D

TR

2

BF869

TR

5

BC

557

BTR

12

BD

X54C

TR

1

1

23

24M

7V

R18

PIH

ER

PT

10V

1 23

25K

VR

15

PIH

ER

PT10V

123

2

2K2

VR

7

PIH

ER

PT10V

1 23

24K

7VR

11

PIH

ER

PT10V

1 23

210K

VR

17

PIH

ER

PT10

V

T2

123

4

21-5

58-2

4

T2

B

123

4

N.F

.

T1

12

34

U15/

30_5

E

CN

5

12

34

JST_B

4P-L

V-T

N

27V

1/2

W

DZ5

9V1

1/2W

DZ4

47V

1/2

W

DZ6

27V

1/2W

DZ10

BA

159

D20

MU

R44

0D

51

MU

R4100

D52

MU

R41

00

D53

BA

159

D21

1N

4148

D22

1N

4148

1/2W

D10

L9R

LA

52-L

87

654

32

1

LM

139

1

IC8

12

34 5

67

8

87

654

32

1

TD

A81

45

IC7

12

34 5

67

8

T5

2

4

3

1

TXFN

12A

B

V4-3

-190

GH

S3

STA

VE

R

V4-3

-196

HS

1

STA

VE

R

+9V

+9V

12V

12V

E

+89

V

+89V

+89V

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D23

24

19

18

16

17

PH

AS

E

E

From Sheet 1

From Sheet 1

From Sheet 1

D

C

B

A

To Sheet 3

To Sheet 3

5.21-43


OCTOBER 1999


250V10UF

AE

105D

C55

20%

47uF

AE

250V

105D

C53

20%

10uF

AE

250V

105D

C54

20%

2u2

AE

250V

C86

20%

10uF50V

AE

C90

20%

E

E

E

E

E

E

EE

E

E

E

1K

5%CF

1/4W

R39

4K7

5%

MF

2W

R72

1K

5%

CF

1/4W

R65

100K

5%

CF

1/4W

R62

220K

5%CF

1/2W

R70

2K2

5%CF

1/4W

R69

2K2

5%CF

1/4W

R68

82K

5%CF

1/4W

R63

1K

5%CF

1/4W

R64

1K

5%CF

1/4W

R66

1K8

5%CF

1/4W

R1091K8

5%CF

1/4W

R108

470nF

MKS

100V

C57

10%

10nF

MKS

630V

C56

5%

PH2369TR7

123

2 5KVR19

PIHERPT10H

1

23

2220KVR20

PIHERPT10H

CONT1

HTRS1

BCL1

CLAMP1

+12V1

+89V1

+130V1

G11

27V1/2W

DZ5

DZ730V1/2W

1N4004D28

1N4004D27

BA159D25

1N4148D32

1N4148D29

1N4148D30

BA159D31

BA159D1

1N41481/2W

D10

T3

1

2

3

4

5

6

7

8

910

11

1242_0118

ELDOR

10R

5%MFF

1/4W

R67

1R85%MFF

1/4WR101

FLY_BACK

G1

12V

12V

G

ENET

+89V

+89V

+89V

+89V

+89V

GNDGND

GNDGND

GND

GND

GNDGND

GND

GND

GND

22

20

21

A1

TO SMPSUPULSE

EHT

FOCUS

From Sheet 2

From Sheet 2

E

D


5.21-44OCTOBER 1999

Video Output/Tubebase PCB - Schematic Diagram (Sheet 1 of 2)

50V

10uF

C2

05

1

2

AE

16V

100

uFC

219

1 2A

E

16V

47u

FC

211

1 2A

E

50V

10u

FC

201

1

2

AE

50V

10u

FC

202

1

2

AE

50V

10uF

C20

3

1

2

AE

16V

100u

FC

212

1 2A

E

1/4

W10

K

5% CF

R20

21 2

1/4

W1

0K 5% CF

R2

031 2

1/4W

12K 5% CF

R2

171 2

1/4

W1

K5

5%

CF

R2

181 2

1/4

W3

90R

5% CF

R26

21 2

1/4W20

0R 5%

CF

R22

6

1

2

1/4W1

00R 5%

CF

R231

1

2

1/4

W3

90R

5% CF

R26

61 2

1/4

W200

R 5%

CF

R2

28

1

2

1/4W10

0R 5%

CF

R2

30

1

2

1/4

W390

R 5%

CF

R2

58

1

2

1/4

W200

R 5%C

F

R22

7

1

2

1/4

W100

R 5%

CF

R22

9

1

2

1/4

W10

K

5%

CF

R27

1

1

2

1/4

W10

K

5% CF

R20

11 2

1/4W1K

5%

CF

R21

6

1

2

1/4

W5K

6

5%

CF

R22

0

1

2

1/4

WN

.F.

5% CF

R22

11 2

1/4

WN

.F. 5%

CF

R22

2

1

2

1/4

W10K

5%

CF

R22

51 2

1/4W

47K

5%

CF

R21

41 2

1/4

W82

0R

5%

CF

R2

13

1

2

1/4

W1

20R

5%

CF

R20

41 2

1/4

W1

20R

5% CF

R20

51 2

1/4

W1

20R

5%

CF

R20

61 2

5% CF

1/4W

100R

R2

231 2

50

V1

00n

F

CP

C21

3

12

10%

50V

100

nF

CPC2

15

1

2

10%

50V

100

nF

CPC2

14

1

2

10%

50V

100n

F

CP

C21

6

12

10%

50V

100n

F

CP

C21

0

12

10%

50

V33p

F CP

C22

2

1

2

5%

50V33

pF CP

C2

21

1

2

5%

50V33

pF CP

C2

20

1

2

5%

50V

1nF

CP

C20

9

1

2

10%

50V

10nF

CP

C2

07

12

10%

50

V1

00n

F

CP

C20

81 2

10

%

50V1

00nF

CP

C20

4

1

2

10%

50V

100

nF

CP

C21

8

1

2

10%

50

V100

nF

CP

C21

7

1

2

10%

220n

F16

VM

CP

C20

61 2

1 2 3 4 5 6 7 8 9 10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

B G R

RGB

LM12

03

IC201

12

3

222

0R

VR

203

12

3PIH

ER

PT

10H

12

3

222

0R

VR

201

12

3PIH

ER

PT

10H

12

3

222

0RV

R20

2

12

3PIH

ER

PT

10H

BC

847B

TR

206

1

23

BC

847

BT

R21

9

1

23

BC

857

BTR

205 1

23

N.F

.C

N20

21

23

CN

201

1 2 3 4 5 6 7

BA

S16

D2

03

1

2

BA

S1

6D

207

12

BA

S1

6D

202

12

BA

S16

D2

01

1

2

CL

AM

P

CO

NT

RA

ST

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

28

29

30

27

26

25

TO

TH

E M

AIN

PC

B

N/C

B G

AIN

G G

AIN

R G

AIN

RGB

CN

9/6

CN

9/1

CN

9/7

CN

9/2

CN

9/8

CN

9/3

See

Sh

eet

2A

See

Sh

eet

2

See

Sh

eet

2

See

Sh

eet

2

B C D

CL

AM

P

BC

L

5.21-45


OCTOBER 1999

Video Output/Tubebase PCB - Schematic Diagram (Sheet 2 of 2)

10

0V

10

uF

C2

36

1 2A

E

50

V4

u7

C2

24

12

AE

50

V4u

7C

22

5

1

2

AE

50

V

4u

7C

22

3

1

2AE

50

V4

u7

C2

34

1

2

AE

50

V4u

7C

23

3

1

2

AE

50

V4u

7C

23

5

1

2

AE

1/2

W1

50

R

5%

CC

R2

69

1 2

1/2

W1

00

R 5%

CF

R2

37

1

2

1/2

W10

0R 5%

CC

R2

38

12

1W10

K 5%

MF

R2

33

12

2W68

0R

5%

MF

R2

45

1

2

2W56

0R 5%

MF

R2

46

1

2

1/2

W1

00

R5

%

CF

R2

39

1

2

1/2

W10

0R 5%

CC

R2

40

1

2

1W10

K 5%

MF

R2

32

1

2

2W68

0R

5%

MF

R2

48

1

2

2W56

0R

5%

MF

R2

49

1

2

2W56

0R

5%

MF

R2

43

1

2

2W68

0R 5%

MF

R2

42

1

2

1W10

K 5%

MF

R2

34

1

2

1/2

W1

00

R 5%

CC

R2

36

1

2

1/2

W1

00

R5

%

CF

R2

35

1

2

1/4

W1

00

R

5%

CF

R2

63

1

2

1/4

W3

3R

5%

CF

R2

52

1

2

1/4

W5

60

R

5%

CF

R2

61

1

2

1/4

W5

6R

5%

CF

R2

53

1 2

1/4

W5

60

R

5%

CF

R2

60

1 2

1/4

W1

00

R 5%

CF

R2

59

1

2

1/4

W3

3R

5%

CF

R2

50

1

2

1/4

W56

0R 5%

CF

R2

57

1

2

1/4

W5

6R

5%

CF

R2

51

1 2

1/4

W5

60

R

5%

CF

R2

64

1 2

1/4

W5

60

R

5%

CF

R2

56

1 2

1/4

W5

6R

5%

CF

R2

55

1 2

1/4

W5

60

R 5%

CF

R2

65

1

2

1/4

W3

3R

5% CF

R2

54

1

2

1/4

W1

00

R

5%

CF

R2

67

1

2

1/2

W3

30

K

5%

CC

R2

68

1 2

1/3

WR

22

MF

F

R2

70

12

5%

2K

V4

n7

CP

C2

26

12

-20

%+

80

%

50

V4

70

nF

MC

PC

22

8

1

2

50

V4

70

nF

ML

CC

C2

29

1

2

50

V

47

0n

F

ML

CC

C2

27

1

2

50

V1

50

pF

CP

C2

31

12

5%

50

V1

50

pF

CP

C2

30

12

5%

50

V1

50

pF

CP

C2

32

12

5%

1

2

3

47

KV

R2

05

1

2

3

PIH

ER

PT

10

H

1

2

3

47

KV

R2

06

1

2

3

PIH

ER

PT

10

H

1

2

3

47

KV

R2

04

1

2

3

PIH

ER

PT

10

H

2u

2H

L2

01

1

2

2u

2H

L2

02

1

2

2u

2H

L2

03

1

2B

SV

52

TR

21

3

1

2

3

2S

D1

60

9C

TR

21

4

1

2

3

BS

V5

2T

R2

09

1

2

3

2S

D1

60

9C

TR

21

0

1

2

3

2S

D1

60

9C

TR

21

8

1

2

3

BS

V5

2T

R2

17

1

2

3B

AS

16

D2

06

1

2

BA

S1

6D

20

5

1

2

BA

S1

6D

20

4

1

2

30

V1

/2W

DZ

20

2

1

2

30

V1

/2W

DZ

20

3

1

230

V1

/2W

DZ

20

4

1

2

F1

2.3

2.2

LA

HS

20

1

1

SG

20

1 1

2N.F

.

HS

20

21

F1

2.3

2.2

LA

HS

20

3

1

F1

2.3

2.2

LA

B G R

H2

KB

KG

KR

H1

G1

G2

FO

CU

SEH

T

DA

G

E

DA

G2

RT

5

6

7

8

9

10

11

E

G1

H

+89V

G2

+130V

+12V

GND

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GND

33

31

35

32

37

36

34

GB

LK

LVL

RB

LK

LVL

BB

LK

LVL

EHT

FOCUS

Fro

mS

he

et1

A

Fro

mS

he

et1

Fro

mS

he

et1

Fro

mS

he

et1

B C D


5.21-46OCTOBER 1999

0090016785 10 inch 56- 5870

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Transcript of 0090016785 10 inch 56- 5870