CT27G7DF

8/13/2019 CT27G7DF

1/28

The service technician is required to read and follow the Safety Precautions and Important Safety Notice in this Manual.

Service ManualColor Television

(NA7DM)Simplified Manual

Copyright 2001 by Matsushita Electric Corporation of America. All rights reserved. Unauthorized copying and distribution is a violation of law.

WARNING!This Service Manual is designed for experienced repair technicians only and is not designed for use by the general publicIt does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a productProducts powered by electricity should be serviced or repaired only by experienced professional technicians.Any attempt toservice or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death.

ORDER NO. MTNC020101A1

B5

Panasonic

CT-27G7DF JP363CT-27G7DUF JP363CT-27G7SDF JP363CT-27G7SDUF JP363

ChassisModels

Simpli

fied

This simplified service manual is issued to add listed models to the main service manual, order No.MTNC010306C1(CT-27G6E);Models CT-27G7DF/DUF are similar to CT-27G6E. A full set of schematics, unique settings, and a com-plete parts list are included in this simplified manual .Please file and use this simplified service manual together with main service manual, order No.MTNC010306C1.

8/13/2019 CT27G7DF

2/28- 2 -

Important Safety NoticeSpecial components are used in this television set which are important for safety. These parts are identified on the

schematic diagram by the symbol and printed inBOLD TYPEon the replacement part list. It is essential thatthese critical parts are replaced with the manufacturers specified replacement part to prevent X-ray radiation,shock, fire or other hazards. Do not modify the original design without the manufacturers permission.

Safety PrecautionsGeneral GuidelinesAn Isolation Transformer should always be usedduring the servicing of a receiver whose chassis is notisolated from AC power line. Use a transformer ofadequate power rating as this protects the technicianfrom accidents resulting in personal injury fromelectrical shocks. It will also protect the receiver frombeing damaged by accidental shorting that may occurduring servicing.When servicing, observe the original lead dress,especially in the high voltage circuit. Replace alldamaged parts (also parts that show signs ofoverheating.)Always replace protective devices, such asfishpaper, isolation resistors and capacitors, and

shields after servicing the receiver. Use onlymanufacturers recommended rating for fuses, circuitsbreakers, etc.High potentials are present when this receiver isoperating. Operation of the receiver without the rearcover introduces danger for electrical shock. Servicingshould not be performed by anyone who is notthoroughly familiar with the necessary precautionswhen servicing high-voltage equipment.Extreme careshould be practiced whenhandling thepicture tube. Rough handling may cause it to implodedue to atmospheric pressure. (14.7 lbs per sq. in.). Donot nick or scratch the glass or subject it to any unduepressure. When handling, use safety goggles and

heavy gloves for protection. Discharge the picturetube by shorting the anode to chassis ground (not tothe cabinet or to other mounting hardware). Whendischarging connect cold ground (i.e. dag ground lead)to the anode with a well insulated wire or use agrounding probe.Avoid prolonged exposure at close range to unshieldedareas of the picture tube to prevent exposure to x-rayradiation.TheTest Picture Tube used for servicing the chassisat the bench should incorporate safety glass andmagnetic shielding. The safety glass provide shieldingfor the tube viewing area against x-ray radiation as wellas implosion. The magnetic shield limits the x-ray

radiation around the bell of the picture tube in additionto the restricting magnetic effects. When using apicture tube test jig for service, ensure that the jig iscapable of handling 50kV without causing x-rayradiation.Before returning a serviced Receiver to the owner,the service technician must thoroughly test the unit toensure that is completely safe to operate.Do not use aline isolation transformer when testing.Leakage Current Cold CheckUnplug the AC cord and connect a jumper between thetwo plug prongs.Measure the resistance between the jumpered AC plugand expose metallic parts such as screwheads,

antenna terminals, control shafts, etc. If the exposedmetallic part has a return path to the chassis, the

reading should be between 240k and 5.2M. If theexposed metallic part does not have a return path tothe chassis, the reading should be infinite.

Leakage Current Hot Check(Fig. 1)Plug the AC cord directly into the AC outlet. Do not usean isolation transformer during the check.Connect a 1.5k 10 watt resistor in parallel with a0.15F capacitor between an exposed metallic partand ground. Use earth ground, for example awater pipe.Using a DVM with a 1000 ohms/volt sensitivity orhigher, measure the AC potential across the resistor.Repeat the procedure and measure the voltage

present with all other exposed metallic parts.Verify that any potential does not exceed 0.75 voltRMS. A leakage current tester (such a Simpson model229, Sencore Model PR57 or equivalent) may be usedin the above procedure, in which case any currentmeasure must not exceed 0.5 milliamp. If anymeasurement is out of the specified limits, there is apossibility of a shock hazard and the receiver must berepaired and rechecked before it is returned to thecustomer.

X-ray RadiationWARNING:The potential source of x-ray radiation in thereceiver is in the High Voltage section and the picturetube. Refer to X-ray Protection Circuit Check &

Adjustments on page 5 to confirm HHS voltage.High Voltage (CRT Anode)Set the brightness, picture, sharpness and colorcontrols to minimum (to obtain dark image). Measurethe High Voltage. The high voltage should be29.25kV 1.25kV. If the upper limit is out of tolerance,immediate service and correction is required.

Note: It is important to use an accurate, calibratedhigh voltage meter.

Figure 1. Hot Check Circuit

8/13/2019 CT27G7DF

3/28- 3 -

Important Safety Notice . . . . . . . . . . . . . . . . . . 2

Safety Precautions . . . . . . . . . . . . . . . . . 2

Service Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . 4

X-Ray Protection Circuit Check& Adjustments . . . . . . . . . . . . . . . . . 5

Receivers Feature Table . . . . . . . . . . . . . . . . . . 6

Location of Receiver Controls . . . . . . . . . . . . . 7

Chassis view . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Schematic Notes . . . . . . . . . . . . . . . . . . . . . . . 14

A-Board schematic . . . . . . . . . . . . . . . . . . . . . 16

A-Board IC voltages . . . . . . . . . . . . . . . . . . . . 21

A & C-Board layout . . . . . . . . . . . . . . . . . . . . . 22

C-Board schematic . . . . . . . . . . . . . . . . . . . . . 24

A & C-transistor voltages . . . . . . . . . . . . . . . . 27

A-Board waveforms. . . . . . . . . . . . . . . . . . . . . 27

8/13/2019 CT27G7DF

4/28- 4 -

Service Notes

Leadless Chip Component

(surface mount)Chip components must be replaced with identical chips

due to critical foil track spacing. There are no holes inthe board to mount standard transistors or diodes.Some chips capacitor or resistor board solder padsmay have holes through the board, however the holediameter limits standard resistor replacement to 1/8watt. Standard capacitor may also be limited for thesame reason. It is recommended that identicalcomponents be used.Chip resistor have a three digit numerical resistancecode - 1st and 2nd significant digits and a multiplier.Example: 162 = 1600 or 1.6kresistor, 0 = 0 (jumper).Chip capacitors generally do not have the valueindicated on the capacitor. The color of the componentindicates the general range of the capacitance.Chip transistors are identified by a two letter code. Thefirst letter indicates the type and the second letter, thegrade of transistor.Chip diodes have a two letter identification code as perthe code chart and are a dual diode pack with eithercommon anode or common cathode. Check the partslist for correct diode number.

Component Removal1. Use solder wick to remove solder from component

end caps or terminal.2. Without pulling up, carefully twist the component

with tweezers to break the adhesive.3. Do not reuse removed leadless or chip

components since they are subject to stressfracture during removal.

Chip Component Installation1. Put a small amount of solder on the board

soldering pads.2. Hold the chip component against the soldering

pads with tweezers or with a miniature alligator clipand apply heat to the pad area with a 30 watt ironuntil solder flows. Do not apply heat for more than3 seconds.

How to Replace Flat-IC

- Required Tools -

1. Cut the pins of a defective IC with wire cutters.Remove IC from board. If IC is glued to the board,heat the IC and release the IC. See Note above.

2. Using soldering iron and needle nose pliersremove the IC pins from the board.

3. Using de-soldering braid and soldering iron removesolder from affected are on board (pads).

4. Position the new flat-ic in place (apply the pins ofthe flat-ic to the soldering pads where the pinsneed to be soldered). Determine the positions ofthe soldering pads and pins by correctly aligningthe polarity symbol. Solder pin #1 first, align the IC.

Solder the pin opposite to pin #1. This will assistpositioning the IC.

5. Solder all pins to the soldering pads using a fine

tipped soldering iron.

6. Check with a magnifier for solder bridge betweenthe pins or for dry joint between pins and solderingpads. To remove a solder bridge, use a de-solderbraid as shown in the figure below.

Note: Some components may be affixed with glue. Be careful not to break or damage foil under the componentor at the pins of the ICs when removing. Usually applying heat to the component for a short time whiletwisting with tweezers will break the component loose.

Chip Components

Soldering iron De-solder braids Needle nose pliers Magnifier

Wire cutters (sharp & small)

Flat IC

SolderingIron

SolderingIron

De-solderingBraid

Polaritysymbol

1st solder2nd solder

Solder SolderingIron

8/13/2019 CT27G7DF

5/28- 5 -

IMPORTANT: To protect against possible damage tothe solid state devices due to arcing or static discharge,make certain that all ground wires and CRT DAG wireare securely connected.

CAUTION: The power supply circuit is above earthground and the chassis cannot be polarized. Use anisolation transformer when servicing the receiver toavoid damage to the test equipment or to the chassis.Connect the test equipment to the proper ground ( ) or

( ) when servicing, or incorrect voltages will bemeasured.

WARNING:This receiver has been designed to meetor exceed applicable safety and x-ray radiationprotection as specified by government agencies andindependent testing laboratories.

To maintain original product safety design standardsrelative to x-ray radiation and shock and fire hazard,

parts indicated with the symbol on the schematicmust be replaced with identical parts. Order parts fromthe manufacturers parts center using the parts

numbers shown in this service manual, or provide thechassis number and the part reference number.

For optimum performance and reliability, all other partsshould be replaced with components of identicalspecification.

X-ray Protection Circuit Check &AdjustmentsThis test must be performed as final check before thereceiver is returned to the customer. If voltages are outof tolerance, immediate service and correction isrequired to insure safe operation and to prevent thepossibility of premature component failure.

Equipment:1. Isolation transformer.2. High voltage meter.3. Short jumper.4. Jumper diode (same as D823, PN S3L60P154004)

diode should be rated a minimum of 150V.Procedure:1. Connect the receiver to an isolation transformer

turn receiver ON.2. Apply a monoscope pattern.3. In service mode (see service mode section in this

manual) select register C0B.4. Measure TP5 (located near the tuner). Compare

the measured value to the left column of the table

below. Set C0B with value from the right columncorresponding to the measured level at TP5Example, if the measured level at TP5 is 1.03V, setC0B to 03.

5. Exit service mode and shut the TV OFF.6. Connect the short jumper between TPD16 and

TPD17.7. Connect the jumper diode between TPD14 and

TPD15 (cathode connected to TPD14, anode

connected to TPD15, see Fig. 3 for locations).8. Apply 75VAC to the input of the isolationtransformer.

9. Turn receiver ON.10. Set PICTURE and BRIGHTNESS to minimum.11. Slowly increase the voltage at the input of the

isolation transformer and confirm HHS voltagemeasure35.0KVwhen the receiver starts to go ouof sync.

12. Turn receiver OFF and remove jumper & diode.

TP5 MEASUREMENT SET C0B TO (HEX)

0 ~ 0.93V 00

0.93 ~ 0.97V 01

0.97 ~ 1.01V 02

1.01 ~ 1.05V 03

1.05 ~ 1.09V 04

1.09 ~ 1.13V 05

1.13 ~ 1.17V 06

1.17 ~ 1.21V 07

8/13/2019 CT27G7DF

6/28- 6 -

Receiver Feature Table

FEATURE / MODEL ALL MODELS

Chassis JP363

No. of channels 181

Menu language Eng/Span/Fr

Closed Caption X

V-Chip (USA/CANADA) X

75 input X

Remote model number EUR501450

Picture tube M68LGL061X

Panablack tube X

Comb filter 2 Dig

V/A norm V

MTS/SAP/DBX X

AI Sound X

Built-in audio power 1.5W x 2 (10%)

Number of speakers 2

A/V in (rear/front) 1 (1 / 1)

S-VHS input (rear/front) 1/0

Headphone jack X

Dimensions mm(WxDxH) in

665.2 x 545 x 594.826.2 x 21.5 x 23.4

Weight (kg/lbs) 35 / 77.2

Power source (V/Hz) 120 / 60

Anode voltage 29.25kV 1.25kV

Video input jack 1Vp-p 75, phono jack

Audio input jack 500mV RMS 47k

A-Board TNP2AH040 BH*

C-Board TNP2AA106 AG*

Table 1. Receiver Features

Specifications are subject to change without notice or obligation.Dimensions and weights are approximate.

* Note:When ordering a replacement board assembly,

append an S next to the board number.Example: to order the A-Board for CT-27G7DF, the

replacement board isTNP2AH040BHS.

8/13/2019 CT27G7DF

7/28- 7 -

Location of Receiver Controls

Figure 2.Location of controls

Quick reference control operation

Power button -Press to turn ON or OFF.

Volume buttons -Press to adjust sound level, or to adjust audio menus, video menus,and select operating features when menus are displayed

Channel buttons - Press to select programmed channels. Press to highlight desiredfeatures when menus are displayed. Also use to select cable converter box channelsafter programming remote control infra-red codes (the TV/AUX/CABLE switch must beset in CABLE position).

Action button - Press to display main menu and access on screen feature andadjustment menus.

TV/Video button -Press to select TV or video input.

32

Remote controlsensor

1 4 5

1

2

3

4

5

8/13/2019 CT27G7DF

8/28- 8 -

Chassis View

Figure 4.Chassis view

Figure 3. A-Board maincomponents and test points(components within dotted

areas are located ontrace side)

Back A/V inputsBack S-Video input

HPJ output Front A/V inputs

8/13/2019 CT27G7DF

9/28

REPLACEMENT PARTS LISTModels: CT-27G7DF, CT-27G7DUF, CT-27G7SDF & CT-27G7SDUF

Important Safety Notice: Components printed inBOLD TYPEhave special characteristics important for safety. When replacingany of these components use only manufacturers specified parts.

- 9 -022-02 Parts List

REF NO. PART NO. DESCRIPTION

CAPACITORS

C001 TCJ2VF1H103Z CAP,C .01UF-Z-50V

C002 TCJ2VB1H471K CAP,C 470PF-K-50V

C003 ECA1HM4R7B CAP,E 4.7UF-50V

C004 TCJ2VC1H150J CAP,C 15PF-J-50VC005 TCJ2VC1H150J CAP,C 15PF-J-50V


C009 ECA1AM470B CAP,E 47UF-10V



C015 ECJ2VB1C224K CAP,C .22UF-K-16V

C016 TCJ2VC1H101J CAP,C 100PF-J-50V

C017 TCJ2VB1C104K CAP,C .1UF-K-16V




C023 TCJ2VC1H151J CAP,C 150PF-J-50VC024 ECA1AM470B CAP,E 47UF-10V





C029 ECQB1H333JF3 CAP,P .033UF-J-50V

C031 ECA1HMR22B CAP,E .22UF-50V




C035 ECA1HM010B CAP,E 1UF-50V

C036 TCJ2VF1H103Z CAP,C .01UF-Z-50VC037 ECA1HM0R1B CAP,E 0.1UF/50V







C045 ECA1HM0R1B CAP,E 0.1UF/50V







C103 ECA0JM331B CAP,E 330UF-6.3V



C350 ECA1CM101B CAP,E 100UF/16V




C354 ECKW3D102KBN CAP,C .001UF-K-2KVDC

C357 EEANA1E1R0B CAP,E 1.0UF-25V




C451 ECA1CHG470B CAP,E 47UF-16V

C452 ECSF1EE105VB CAP,E 1.0UF-25V

C453 ECEA1HFS010B CAP,E 1UF-50V

C454 ECA1EM102E CAP,E 1000UF-25V

C455 ECA1VHG101B CAP,E 100UF-35V


C459 ECA1VHG471B CAP,E 470UF-35V





C510 ECCR2H100D5 CAP,C 10PF-D-500V

C511 ECKR2H821KB5 CAP,C 820PF-K-500VC512 ECKR2H101KB5 CAP,C 100UF-K-500V

C531 ECA1EM220B CAP,E 22UF-25V

C551 ECA1VM331B CAP,E 330UF-35V

C554 ECKR2H561KB5 CAP,C 560PF-K-500V


C556 ECA1CM471B CAP,E 470UF-16V


C560 ECEA1HN010UB CAP,E 1UF/50V


C563 ECWH12H822JS CAP,P .0082UF-J-1.2KV

C564 ECWH12H562JS CAP,P .0056UF-J-1.2KV

C565 ECKW3D181JBP CAP,C 180PF-J-2KVC566 ECKW3D181JBP CAP,C 180PF-J-2KV

C568 ECWF2274JBB CAP,M .27UF-J-200V

C569 ECWF2474JBB CAP,M .24UF-J-200V

C570 ECA1CM222E CAP,E 2200UF-16V






C578 ECA0JM332B CAP,E 3300PF-6.3V


C580 ECKR2H152KB5 CAP,C .0015UF-K-500V



C801 ECKWAE472ZED CAP,C 4700PF-Z-500V



C805 EC0S2DA331BB CAP,E 330UF/200V

C806 ECQM4103KZW CAP,P .01UF-K-400V

C807 ECKR3A821KBP CAP,C 820PF-K-1KV

C808 ECA1VM101B CAP,E 100UF-35V



8/13/2019 CT27G7DF

10/28- 10 -Parts List



022-02

PARTS

LI ST


C812 ECQU2A224MVA CAP,P .22UF-M-250VAC






C823 ECA1VM471E CAP,E 470UF-35V


C825 EEUMG2C221S CAP,E 220UF-160V



C828 ECA160V33UE CAP,E 33UF/160V




C2204 AP106K016CAE CAP,T 10UF/16VC2205 ECA1HMR33B CAP,E .33UF-50V


C2207 AP335K016CAE CAP,T 3.3UF/16V





C2213 ECA1HMR47B CAP,E .47UF-50V


C2215 EEANA1E100B CAP,E 10UF-25V

C2216 TCJ2VC1H100D CAP,C 10PF-J-50V

C2301 ECA1EM102E CAP,E 1000UF-25VC2302 ECEA1HN010UB CAP,E 1UF/50V





C2312 ECEA1HN010UB CAP,E 1UF/50V







C3001 ECA1HM0R1B CAP,E 0.1UF/50V





DIODES

D002 MA165TA5VT DIODE, SWITCHING

D006 MA4330HTA DIODE

D052 MA4068MTA DIODE, ZENER

D053 MA4056MTA DIODE



D451 ERA15-01V3 DIODE, RECTIFIER





D531 AS01V0 DIODE

D551 D1NL20UV70 DIODE

D554 AU02V0 DIODE

D558 RS3FS DIODE

D559 BYD33G-113 DIODE

D561 AU02V0 DIODE



D607 MA152KTX DIODE

D608 MA152KTX DIODE

D609 MA152KTX DIODED801 D3SBA60-4103 DIODE

D806 TAP4GA0006 DIODE

D808 SARS01V1 DIODE

D809 AG01V0 DIODE

D810 AG01V0 DIODE

D811 AG01V0 DIODE

D812 MA4068MTA DIODE, ZENER


D821 MA4047HTA DIODE

D822 RN1ZLF-B1 DIODE

D823 S3L60P154004 DIODE

D824 D1NL20UV70 DIODED2350 MA4068MTA DIODE, ZENER





D3001 MA3110MTX DIODE, ZENER











FUSES

F801 XBA2A00101 FUSE 6.3A 125V

INTEGRATED CIRCUITS

IC001 M65580MAP103 MPU/VCJ

IC002 C3EAFC000011 EEPROM

IC003 PIC-37042SR REMOTE SENSOR


8/13/2019 CT27G7DF

11/28



- 11 -022-02 Parts List

IC005 PQ1X331M2ZP 3.3 V REGULATOR

IC006 MN1280R RESET

IC050 TC74HC4066AL HALF TONE (OSD)

IC451 LA7838 V. OUT

IC551 AN78M09LB 9V REGULATOR

IC552 AN78M05LB PLUS 5V AVR

IC553 AN78M05LB PLUS 5V AVR

IC801 STRG5624A VCO (POWER SUPPLY)

IC2201 AN5829S-E1V MTS , S-AGC

IC2301 AN17800A AUDIO OUT AMP

IC2302 AN17800A AUDIO OUT AMP

COILS

L001 EXCELSA35T FERRITE BEAD

L003 TLUABTA2R2K COIL, PEAKING 2.2UH


L005 EXCELDR35V FERRITE BEAD

L006 EXCELSA24T FERRITE BEADL007 EXCELDR35V FERRITE BEAD

L008 TLUABTA470K COIL, PEAKING 47UH

L009 EXCELSA35V FERRITE BEAD

L010 ELESN330JA COIL, PEAKING 33UH

L011 ELESN330JA COIL, PEAKING 33UH


L014 ELESN180KA COIL, PEAKING 18UH





L090 EXCELSA24T FERRITE BEADL104 TLUABTA2R2K COIL, PEAKING 2.2UH







L351 TLTABT101K COIL, PEAKING



L551 ELH5L7103 COIL

L801 ELF20N020A COIL, 2UH

L802 TALL08T470KA LINE FILTER

L803 TALL08T680KA LINE FILTER

L805 TALL08T220KA TRANSFORMER, LINE FILTER


L2350 ELESN4R7JA COIL, PEAKING 4.7UH

TRANSISTORS

Q001 2SD601ARTX TRANSISTOR

Q006 2SB709ARTX TRANSISTOR




Q009 2SC1473A TRANSISTOR









Q351 2SC3063RL TRANSISTOR







Q452 2SD601ARTX TRANSISTORQ453 2SD601ARTX TRANSISTOR

Q501 2SC4212HLB TRANSISTOR



Q551 2SC5339LBMA1 TRANSISTOR



Q820 2SA1767QTA TRANSISTOR

Q830 2SB1011QRL TRANSISTOR


RELAYS

RL801 TSEH0005 RELAYRESISTORS

R001 ERJ6GEYJ102V RES,M 1K-J-1/10W

R003 ERJ6GEYJ105V RES,M 1M-J-1/10W

R004 ERJ6GEYJ562V RES,M 5.6K-J-1/10W

R006 ERDS2TJ101T RES,C 100-J-1/4W

R007 ERJ6GEYJ471V RES,M 470-J-1/10W


















8/13/2019 CT27G7DF

12/28- 12 -Parts List



022-02

PARTS

LI ST



R032 ERJ6ENF1002V RES,M 10K-F-1/10W














R062 ERJ6GEYJ122V RES,M 1.2K-J-1/10WR063 ERJ6GEYJ122V RES,M 1.2K-J-1/10W











R081 ERJ6GEYJ103V RES,M 10K-J-1/10WR090 ERJ6GEYJ471V RES,M 470-J-1/10W

R091 ERJ6GEYJ185V RES,M 1.8MEG-J-1/10W




R351 ERG2FJ123H RES,M 12K-J-2W



R354 ERDS1TJ272T RES,C 2.7K-J-1/2W



R357 ERJ6ENF5100V RES,M 510-F-1/10W













R384 ERJ6ENF2701V RES,M 2.7K-F-1/10W









R451 ERDS1FJ1R0P RES,C 1.0-J-1/2W






R459 ERJ6GEYJ683V RES,M 68K-J-1/10WR460 ERDS2TJ102T RES,C 1K-J-1/4W











R502 ERJ6GEYJ562V RES,M 5.6K-J-1/10WR504 ERDS2TJ681T RES,C 680-J-1/4W





R510 ERG3FJ182 RES,M 1.8K-J-3W

R511 ERG3FJ182 RES,M 1.8K-J-3W

R512 ERG2FJ392H RES,M 3.9K-J-2W



R531 ERD25FJ470P RES,C 47-J-1/4W

R532 ERJ6ENF1002V RES,M 10K-F-1/10W


R551 ERDS1FJ1R0T RES,C 1.0-J-1/2W


R556 ERG1SJ221P RES,M 220-J-1W


R558 ERQ1CKPR56S RES,F .56-K-1W



R562 ERG3FJ680H RES,M 68-J-3W

R563 ERG1SJ150P RES,M 15-J-1W


8/13/2019 CT27G7DF

13/28



- 13 -022-02 Parts List


R605 ERDS2TJ103T RES,C 10K-J-1/4W




R801 ERF7ZK1R5 RES,W 1.5-K-7W


R803 ERG2FJ100H RES,M 10K-J-1/2W


R805 ERX2FZJR18H RES,M .18-J-2W

R806 ERX2FJR56H RES,M .56-J-2W


R808 ERDS2TJ4R7T RES,C 4.7-J-1/4W

R809 ERDS2TJ472T RES,C 4.7K-J-1/4

R815 ERC12ZGM825D RES,S 8.2MEG-M-1/2


R822 ERDS1FJ1R0T RES,C 1.0-J-1/2WR823 ERDS1FJ272T RES,C 2.7K-J-1/2W






R850 ERQ12HJR56P RES,F .56-J-1/2W





R2206 ERJ6GEYJ273V RES,M 27K-J-1/10WR2301 ERQ2CJP3R9S RES,F 3.9-J-2W



















R3013 ERJ6ENF75R0V RES,M 75.0-F-1/10W

R3014 ERJ6ENF75R0V RES,M 75.0-F-1/10W








SWITCHES

S001 EVQPF106K SWITCH







TRANSFORMERS

T501 TLH15452 TRANSFORMER, HORIZONTAL

DRIVER

T551 KFT4AA348F2 TRANSFORMER, FLYBACK

T801 ETS35AA5E3NC TRANSFORMER

CRYSTALS / FILTERS

X001 TSSA092 CRYSTAL OSCILLATOR

X002 AF080005BE CRYSTAL

OTHERS

TNR001 ENG36604GR TUNER

M001 TSX2AA0281 A/C LINE CORD

M002 M68LGL061X CRT 27

M003 TJSC00300 CRT SOCKET

DY TLY2AA006 DEFLECTION YOKE

DEG TLK2AA0011 COIL, DEGAUSSING

M004 0FMK014ZZ CONVERGENCE CORRECTOR STRIPM005 TMM2A30702 WEDGE, YOKE

M006 JH291U-009 YOKE, CONVERGENCE

M007 TXF3A01ZERA ASSY. DAG GND

JK3001 TJB2A9064B JACK A/V

M08 EAS12D123JD3 SPEAKER 16 OHM, 3W

M09 TMW2A97121 STRAIN RELIEF: AC LINE CORD

M010 TBM2A10141 BADGE, PANASONIC

M011 TBX2AA1701GS BUTTON, 7-KEY

M012 TKX2AA00401 IR GUIDE

M013 TXFKY01FSERASSY, CABINET FRONT (CT-27G7DF,CT-27G7DUF) (2) Pad Foam, LabelService Information, (2) Felt, IR Guide

M014 TXFKY04FSERASSY, CABINET FRONT (CT-27G7SDF,CT-27G7SDUF) (2) Pad Foam, LabelService Information, (2) Felt, IR Guide

M015 TXFKU01FSERASSY, CABINET BACKCabinet Back, (2) Label X-Ray Warning,(2) Label, Felt

JK3002 TJB2AA0046 TERMINAL, FRONT A/V

JK3003 TJB2AA0171 TERMINAL, S-VHS

ACCESORIES

M016 TQB2AA0431 MANUAL, OWNERS

M0017 EUR501450 REMOTE CONTROL

M0018 UR50EC1190A BATTERY COVER, REMOTE CONTROL


8/13/2019 CT27G7DF

14/28

Schematic Notes

- 14 -

SCHEMATIC NOTES1. Resistors are carbon 1/4W unless noted

otherwise.2. Capacitors are ceramic 50V unless noted

otherwise.3. Coil value notes is inductance in H.4. Test point indicated by ; Test point but no

pin .5. Components indicated with are critical

parts and replacement should be madewith manufacture specified replacementparts only.

6. (BOLD LINE) indicates the routeof B+ supply.

7. The schematic diagrams are current atthe time of printing and are subject tochange without notice.

8. Ground symbol indicates HOTGROUND CONNECTION;indicates COLD GROUND.

NOTE: All other component symbols are

used for engineering design

purposes.

WAVEFORM MEASUREMENTS1. indicates waveform measurement.

(Measurement can be taken at the bestaccessible location in common to theindicated point.)

2. Taken with an NTSC signal generatorconnected to the antenna terminal.

(NTSC color bar pattern of 8 bars of EIAcolors, 100 IRE white and 7.5 IRE black.)

3. Customer Controls (Picture/Audio Menu) areset to Normalize. Volume is set to MIN.

4. All video and color waveforms are takenwith a wideband scope and a probewith low capacitance (10 to 1). Shapeand peak al ti tudes may varydepending on the type of Oscilloscopeused and its settings.

5. Ground symbol shown on waveformnumber indicates (Hot) ground leadconnection of the Oscilloscope.

CAUTION: Incorrect ground connection of

the test equipment will result in erroneous

readings.

3

VOLTAGE MEASUREMENTS1. Voltage measurement:

- AC input to the Receiver is 120V.NTSC (HD, 1125i & 525P whenapplicable) signal generator isconnected to the antenna of theReceiver. (Color bar pattern of 100IRE white and 7.5 IRE black.)

- All Picture and Audio adjustments areset to Normalize.TV ANT/CABLE - (Set-Up Menu) in

TV/ANT ModeVolume - Min.TV/Video SW - TV positionAudio Mode - Stereo

- Voltage readings are nominal andmay vary 10% on active devices.Some voltage reading will varywith signal strength and picturecontent.

- Supply voltages are nominal.

2. Ground symbol indicates ground leadconnection of meter.Incorrect ground connection will resultin erroneous readings.

CAUTION:Incorrect ground connectionof the test equipment will result in

erroneous readings.

IMPORTANT SAFETY NOTICETHIS SCHEMATIC DIAGRAM INCORPORATES SPECIALFEATURES THAT ARE IMPORTANT FOR PROTECTION FROMX-RADIATION, FIRE AND ELECTRICAL SHOCK HAZARDS.WHEN SERVICING IT IS ESSENTIAL THAT ONLYMANUFACTURERS SPECIFIED PARTS BE USED FOR THECRITICAL COMPONENTS DESIGNATED WITH A IN THESCHEMATIC.

B

E C

CHIP TRANSISTORLEAD DESIGNATION

8/13/2019 CT27G7DF

15/28- 15 -

Schematic Notes

PARTS

LI ST

NOTAS DE LOS DIAGRAMAS1. Las Resistencias son de Carbn de 1/4W, a

menos que se indique otra caracterstica.2. Los Capacitores son de Cermica para

50V, a menos que se indique otracaracterstica.

3. El valor indicado de las Bobinas es lainductancia expresada en H.

4. Los puntos de prueba en la terminal dealgn componente son indicados por Lospuntos de prueba fuera de loscomponentes se indican con .

5. Los componentes sealados con elsmbolo son consideradoscomponentes crticos y deben ser

reemplazados slo con las partesespecificadas por el fabricante.

6. (LINEA GRUESA) indica laslneas de alimentacin de los VoltajesB+.

7. Los diagramas elctricos estn sujetos acambio sin previo aviso.

8. El smbolo indica que es unaconexin aTierra Calientey el smbolo

indica conexin aTierra Fra.

NOTA: Los demas smbolos de

componentes incluidos sonusados con fines de diseo.

MEDICIN DE VOLTAJES1. Medicin de voltaje:

- El voltaje de entrada al Receptor es de120V de Corriente Alterna. Ungenerador de patrones con formatoNTSC se conecta a la entrada de laantena. (Patrn de Barras de Colorescon 100 IREs para el Blanco y 7.5 IREspara el Negro.)

- Los ajustes de los Menus Picture yAudio se normalizan.En el Men Set-Up, en la opcinANTENA, se selecciona el modo deCABLE.El nivel de Volumen se minimiza.De los modos TV y Video, seleccionar elmodo TV.Seleccionar modo Estereo del Audio.

- Las mediciones de los voltajes sonnominales y pueden variar hasta10% en componentes enfuncionamiento. Las lecturas de losvoltajes pueden variar por lapotencia de la seal y el contenidode la imagen.

- Las fuentes de voltajes son

nominales.2. El smbolo indica el tipo de tierra quese utiliza en la conexin del medidor.

PRECAUCION: SI no se utiliza la

conexin a la tierra adecuada, se

obtendrn mediciones equivocadas y

podra daar el equipo de medicin.

MEDICIN DE FORMAS DE ONDA

1. Un smbolo como indica el punto para mediruna seal. (La medicin puede hacerse enel punto con mayor accesibilidad, siempreque sea comn al indicado.)

2. Se midieron utilizando un generador conformato NTSC conectado a la terminal de laantena. (Patrn de 8 Barras de ColoresEAI, formato NTSC de 100 IREs para elBlanco y 7.5 IREs para el Negro.)

3. Los ajustes de usuario de los MenusPICTURE y AUDIO se normalizaron.Posteriormente el nivel de volumen seajusta al mnimo.

4. Las formas de onda de Video y Colorfueron tomadas con un osciloscopio de

banda alta y con un punta de prueba debaja capacitancia (10 a 1). La forma yamplitud de las ondas puede variarsegn el tipo de osciloscopio que seutilice y sus caractersticas.

5. El smbolo de tierra que aparece junto alnmero de la forma de onda, indica quese utiliza conexin a Tierra Calienteenel extremo negativo de la punta deprueba.

PRECAUCION: Si no se utiliza la conexin

a la tierra adecuada, se obtendrn

mediciones equivocadas y podra daar el

equipo de medicin.

3

NOTA DE SEGURIDADLOS DIAGRAMAS ELCTRICOS INCLUYENCARACTERSTICAS ESPECIALES MUY IMPORTANTESPARA LA PROTECCIN CONTRA RAYOS-X,QUEMADURAS Y DESCARGAS ELCTRICAS. CUANDOSE DE SERVICIO ES IMPORTANTE USAR PARAREEMPLAZO DE COMPONENTES CRITICOS, SOLOPARTES ESPECIFICADAS POR EL FABRICANTES. LOSCOMPONENTES CRITICOS ESTAN SEALADOS EN LOSDIAGRAMAS POR EL SIMBOLO .

BE

C

IDENTIFICACIN DE TERMINALESPARA TRANSISTORES ENCHIP

8/13/2019 CT27G7DF

16/28-16-A-Board

8/13/2019 CT27G7DF

17/28-17- A-BoaA-Boa

8/13/2019 CT27G7DF

18/28-18-A-Board

8/13/2019 CT27G7DF

19/28-19- A-BoaA-Boa

8/13/2019 CT27G7DF

20/28-20-A-Board

8/13/2019 CT27G7DF

21/28-21-

IC001

123456789

1011121314151617181920

212223242526272829303132333435

3637383940

. . . . . 2.50

. . . . . 1.19

. . . . . 4.98

. . . . . 4.92

. . . . . 2.50

. . . . .*4.99. . . . . 1.85

. . . . . 4.99

. . . . . 2.83

. . . . . 2.81

. . . . . 4.95

. . . . . 2.95

. . . . . 2.49

. . . . . 4.98

. . . . . 2.48

. . . . .*5.00

. . . . . 2.50

. . . . . 1.42

. . . . . 3.32

. . . . . 0.00

. . . . . 0.00. . . . . 0.52

. . . . . 1.71

. . . . . 1.09

. . . . . 0.45

. . . . . 1.02

. . . . . 2.04

. . . . . 2.66

. . . . . 3.29

. . . . . 2.72

. . . . . 0.00

. . . . . 2.73

. . . . . 4.98

. . . . . 2.79

. . . . . 2.40

. . . . . 2.67. . . . . 2.36

. . . . . 0.00

. . . . . 0.00

. . . . . 0.00

4142434445464748495051525354555657585960

616263646566676869707172737475

7677787980

. . . . .0.00

. . . . .4.98

. . . . .2.30

. . . . .1.75

. . . . .3.71

. . . . .3.70. . . . .0.05

. . . . .4.98

. . . . .4.98

. . . . .0.04

. . . . .4.98

. . . . .0.18

. . . . .0.47

. . . . .0.17

. . . . .4.98

. . . . .0.07

. . . . .4.98

. . . . .4.98

. . . . .0.05

. . . . .3.70

. . . . .0.05. . . . .3.79

. . . . .0.00

. . . . .0.42

. . . . .0.04

. . . . .0.05

. . . . .0.02

. . . . .1.06

. . . . .0.00

. . . . .4.98

. . . . .0.03

. . . . .4.99

. . . . .0.03

. . . . .4.97

. . . . .2.04

. . . . .0.19. . . . .2.16

. . . . .0.00

. . . . .2.18

. . . . .2.17

IC050

1234

56789

1011121314

. . . . . 2.67

. . . . . 3.23

. . . . . 3.24

. . . . . 2.73

. . . .45.90. . . .45.90

. . . . . 0.00

. . . . . 2.74

. . . . . 3.23

. . . . . 0.00

. . . . . 0.00

. . . . . 0.00

. . . .45.50

. . . . . 4.99

IC2302

123456789

101112

. . . . 13.42

. . . . . 0.00

. . . . 13.46

. . . . . 0.00

. . . . . 9.75

. . . . . 0.75

. . . . 16.87

. . . . . 0.00

. . . . . 4.97

. . . . . 8.93

. . . . . 3.04

. . . . 18.70

IC2301

12345678

9101112

. . . . 13.40

. . . . . 0.00

. . . . 13.48

. . . . . 0.00

. . . . . 9.74

. . . . . 0.75

. . . . 16.89

. . . . . 0.00

. . . . . 4.97. . . . . 8.96

. . . . . 3.05

. . . . 18.69

IC451

123456789

10111213

. . . . . 8.22

. . . . . 8.66

. . . . . 4.10

. . . . . 4.15

. . . . .-0.89

. . . . . 4.12

. . . . . 3.81

. . . . 27.27

. . . . . 2.74

. . . . . 1.28

. . . . .-0.83

. . . . 15.28

. . . . 28.11

IC002

12345678

. . . . . 0.00

. . . . . 0.00

. . . . . 0.00

. . . . . 0.00

. . . . . 3.75

. . . . . 3.70

. . . . . 0.00

. . . . . 4.99

IC005

123

45

. . . . . 5.00

. . . . . 0.00

. . . . . 5.00

. . . . . 1.28. . . . . 3.30

IC003

123

. . . . .*4.93

. . . . . 0.00

. . . . . 4.99

IC553

123

. . . . . 9.42

. . . . . 0.00

. . . . . 5.00

IC551

123

. . . . 14.00

. . . . . 8.95

. . . . . 0.00

IC552

123

. . . . 14.00

. . . . . 0.00

. . . . . 5.03IC006

123

. . . . . 4.99

. . . . . 4.98

. . . . . 0.00

IC801

1

2345

. . . . .-0.03

. . . . . 0.12. . . . . 0.00

. . . . 32.19

. . . . . 1.78

* TV may shut down

IC2201

123456789

1011121314151617181920

21222324

. . . . . 1.29

. . . . . 2.19

. . . . . 2.19

. . . . . 2.29

. . . . . 2.18

. . . . . 2.76

. . . . . 5.02

. . . . . 2.36

. . . . . 2.43

. . . . . 0.00

. . . . . 2.23

. . . . . 3.30

. . . . . 3.49

. . . . . 2.18

. . . . . 3.45

. . . . . 3.56

. . . . . 0.00

. . . . . 3.65

. . . . . 3.78

. . . . -0.07

. . . . . 2.21. . . . . 2.23

. . . . . 2.19

. . . . . 2.18

A-Board IC voltages TNP2AH040BH

A-Board

8/13/2019 CT27G7DF

22/28-22-A&C-Board

8/13/2019 CT27G7DF

23/28-23- A&C-Bo

8/13/2019 CT27G7DF

24/28-24-C-Board

8/13/2019 CT27G7DF

25/28-25- A-BoaC-Boa

8/13/2019 CT27G7DF

26/28-26-

Q2350

7.240.000.72

BCE

Q090

1.440.002.12

Q006

2.670.003.32

Q007

2.720.003.36

Q008

2.740.003.39

Q051

5.000.002.67

Q052

5.000.002.74

BCE

Q053

0.005.002.67

Q054

0.005.002.72

Q055

0.005.002.74

Q050

5.000.002.72

Q505

2.444.982.30

Q520

1.744.981.58

BCE

Q001

0.03411.73

0.00

Q606

0.003.630.00

Q092

9.002.825.00

Q451

0.590.000.00

Q453

0.008.650.00

Q009

0.550.040.00

BCE

Q830

129.5126.3130.1

Q501

0.4084.40

0.00

Q820

130.10.00

130.5

Q551

-0.12-31.37

0.00

Q452

0.002.490.00

Q6054.230.004.21

BCE

Q351

6.49165.00

6.03

BC

E

Q352

6.35169.70

5.89

Q353

6.34168.50

5.93

Q354

3.326.49

2.75

Q355

3.366.35

2.79

Q356

3.386.34

2.81

C-Board transistor voltages TNP2AA106AG

A-Board transistor voltagesTNP2AH040BH

A&C-Board Qs

8/13/2019 CT27G7DF

27/28-27-

A-BOARD WAVEFORMS -- FORMAS DE ONDA TARJETA-A

1V p-p[20s]TPA5 (VIDEO)

1 1.4V p-p[20s](B OUT) A11-37 3V p-p[20s]

IC001PIN 43 (FB PULSE)13

1.0V p-p[20s]IC001 PIN 22 (Y IN)

2 8 9.2V p-p[5ms]IC451 PIN 2 (VERT IN)

14 234.0V p-p[20s]Q501 Collector (H DRIVE)

0.6 p-p[20s]IC001 PIN 24 (C IN)

3 1.54V p-p[5ms]

IC451 PIN 7 (DRIVE)9 15

1.24kV p-p[20s]

Q551 Collector (H OUT)

4 IC001 PIN 35ADC OSC

14.33MHz Xtal

10 58.4V p-p[5ms]IC451 PIN 12 (VERT OUT)

16 330.0V p-p[5s]IC801 PIN 1

1.5V p-p[20s](R OUT) A11-1

5 31.0V p-p[5ms]IC451 PIN 13 (PUMP UP)11 3.22V p-p[5s]

IC801 PIN 517

1.4V p-p[20s](G OUT) A11-2

6 12 4.8V p-p[20s]IC001 PIN 44 (H PULSE)

With pattern in S-VHS input*

A-Board W

8/13/2019 CT27G7DF

28/28

CT27G7DF

Documents

Transcript of CT27G7DF