No.51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
1 COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
Jan. 2002
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
CONTENTS SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 2
SAFETY PRECAUTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 4
FEATURES・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 5 MAIN DIFFERENCE LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 5
SPECIFIC SERVICE INSTRUCTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 6
SERVICE ADJUSTMENTS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 9
PARTS LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 17
★ OPERATING INSTRUCTIONS
★ STANDARD CIRCUIT DIAGRAM ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 2-1
SERVICE MANUALCOLOUR TELEVISION
No.51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
2
SPECIFICATIONSContent
ITEM AV28BT7ENS (Silver)AV28BT7ENB (Black)
AV28BT7EES (Silver)AV28BT7EEB (Black)
AV28BT7EPS (Silver)AV28BT7EPB (Black)
Dimensions (WxHxD) 77 x 58 x 48 cm
Weight 33.2 kg
TV RF System B/G B/G, D/K, K1 B/G, L/L’
TV Mode PAL PAL / SECAM
Colour SystemVideo Mode
PAL / NTSC 3.58 /NTSC 4.43
PAL / SECAM / NTSC 3.58 /NTSC 4.43
Teletext System Fastext / Toptext
Stereo System A2 / German + NICAM
Tuning System Frequency Synthesizer Tuning System
Number Of CH memory position 100 ch
VHF (VL) 46.25MHZ ~ 168.25MHz
VHF (VH) 175.25MHz ~ 463.25MHz
UHF 471.25MHz ~ 863.25MHzReceiving Frequency
CATV Super (S11-S20) & Hyper (S21-S41) bands receivable
VIF Carrier 38.9MHz
32.4MHz (6.5MHz)
32.9MHz (6.0MHz)Intermediate Frequency
SIF Carrier
33.4MHz (5.5MHz)
Colour Sub Carrier Frequency PAL (4.43MHz), SECAM (4.43MHz), NTSC (3.58MHz/4.43MHz)
Aerial Input Terminal 75Ohm Unbalanced
Power Input AC 220 ~ 240V, 50Hz
Power Consumption 120W(Max.)/103W(Avg.)
Picture Tube 28 inch measured diagonally
High Voltage 28kV (in cut-off service mode)
Speaker 57 ×160 mm ellipse type ×2
Audio Output 8W + 8W
Video 1Vp-p, 75 Ohm
S/VideoY: 1Vp-p PositiveC: 0.286Vp-pInput
Audio (L/R) 500 mVrms, High Impedance
Video 1 Vp-p, 75 OhmOutput
Audio (L/R) 500 mVrms, Low Impedance
AV1 (Video/Audio/RGB)Rear Side
AV2 (Video/Audio/S-VHS)Input Terminal
Front Side AV3 (Video/Audio)
Front Side Headphone jack (Stereo mini jack 3.5 )
AV1 (Video/Audio)Output TerminalRear Side
AV2 (Video/Audio) (Selected TV, AV1 or AV3)
Remote Control Unit RM-C85, Battery size:AAA/R03 x 2
Design & specifications are subject to change without notice.
No.51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
3
■■■■21-pin Euro connector (SCART socket) : AV-1 / AV-2(P-P= Peak to Peak, S-W= Sync tip to white peak, B-W= Blanking to white peak)
PinNo.
Signal Designation Matching Value AV-1 AV-2
1 AUDIO R output 500mVrms(Nominal),Low impedance ○(TV OUT)
○(TV/LINE OUT)
2 AUDIO R input 500mVrms(Nominal),High impedance ○ ○
3 AUDIO L output 500mVrms(Nominal),Low impedance ○(TV OUT)
○(TV/LINE OUT)
4 AUDIO GND ○ ○
5 GND (B) ○ ○
6 AUDIO L input 500mVrms(Nominal), High impedance ○ ○
7 B input 700mVB-W, 75Ω ○ NC
8FUNCTON SW(SLOW SW)
Low : 0-3V, High : 8-12V, High impedance ○ NC
9 GND (G) ○ ○
10 - NC -
11 G input 700mVB-W, 75Ω ○ NC
12 - NC -
13 GND (R) ○ ○
14 GND (YS) ○ NC
15 R / C inputR : 700mVB-W, 75ΩC : 300mVP-P, 75Ω
○(R/C)
○(only C)
16 Ys input Low : 0 – 0.4, High : 1 - 3V, 75Ω ○ NC
17 GND(VIDEO output) ○ ○
18 GND(VIDEO input) ○ ○
19 VIDEO output 1VS-W(Negative going sync), 75Ω○
(TV)○
(TV/LINE OUT)
20 VIDEO / Y input 1VS-W(Negative going sync), 75Ω ○ ○
21 COMMON GND ○ ○
[Pin assignment]
No.51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
4
SAFETY PRECAUTIONS1. The design of this product contains special hardware, many
circuits and components specially for safety purposes. Forcontinued protection, no changes should be made to the originaldesign unless authorized in writing by the manufacturer.Replacement parts must be identical to those used in the originalcircuits. Service should be performed by qualified personnelonly.
2. Alterations of the design or circuitry of the products should not be
made. Any design alterations or additions will void themanufacturer's warranty and will further relieve the manufacturerof responsibility for personal injury or property damage resultingtherefrom.
3. Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics areoften not evident from visual inspection nor can the protectionafforded by them necessarily be obtained by using replacementcomponents rated for higher voltage, wattage, etc. Replacementparts which have these special safety characteristics areidentified in the parts list of Service manual. Electricalcomponents having such features are identified by shadingon the schematics and by ( ) on the parts list in Servicemanual. The use of a substitute replacement which does nothave the same safety characteristics as the recommendedreplacement part shown in the parts list of Service manual maycause shock, fire, or other hazards.
4. Don't short between the LIVE side ground and ISOLATED
(NEUTRAL) side ground or EARTH side ground whenrepairing.Some model's power circuit is partly different in the GND. Thedifference of the GND is shown by the LIVE side GND, theISOLATED(NEUTRAL) side GND and EARTH side GND. Don'tshort between the LIVE side GND and ISOLATED(NEUTRAL)side GND or EARTH side GND and never measure with ameasuring apparatus (oscilloscope etc.) the LIVE side GND andISOLATED(NEUTRAL) side GND or EARTH side GND at thesame time.If above note will not be kept, a fuse or any parts will be broken.
5. If any repair has been made to the chassis, it is recommended
that the B1 setting should be checked or adjusted (SeeADJUSTMENT OF B1 POWER SUPPLY).
6. The high voltage applied to the picture tube must conform with
that specified in Service manual. Excessive high voltage cancause an increase in X-Ray emission, arcing and possiblecomponent damage, therefore operation under excessive highvoltage conditions should be kept to a minimum, or should beprevented. If severe arcing occurs, remove the AC powerimmediately and determine the cause by visual inspection(incorrect installation, cracked or melted high voltage harness,poor soldering, etc.). To maintain the proper minimum level ofsoft X-Ray emission, components in the high voltage circuitryincluding the picture tube must be the exact replacements oralternatives approved by the manufacturer of the completeproduct.
7. Do not check high voltage by drawing an arc. Use a high voltage
meter or a high voltage probe with a VTVM. Discharge thepicture tube before attempting meter connection, by connectinga clip lead to the ground frame and connecting the other end ofthe lead through a 10k 2W resistor to the anode button.
8. When service is required, observe the original lead dress. Extra
precaution should be given to assure correct lead dress in thehigh voltage circuit area. Where a short circuit has occurred,those components that indicate evidence of overheating shouldbe replaced. Always use the manufacturer's replacementcomponents.
9. Isolation Check(Safety for Electrical Shock Hazard)After re-assembling the product, always perform an isolationcheck on the exposed metal parts of the cabinet (antennaterminals, video/audio input and output terminals, Control knobs,metal cabinet, screwheads, earphone jack, control shafts, etc.)to be sure the product is safe to operate without danger ofelectrical shock.
(1) Dielectric Strength TestThe isolation between the AC primary circuit and all metal partsexposed to the user, particularly any exposed metal part having areturn path to the chassis should withstand a voltage of 3000VAC (r.m.s.) for a period of one second.(. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliancerated up to 120V, and 3000V AC (r.m.s.) to an appliance rated200V or more, for a period of one second.)This method of test requires a test equipment not generally foundin the service trade.
(2) Leakage Current CheckPlug the AC line cord directly into the AC outlet (do not use a lineisolation transformer during this check.). Using a "LeakageCurrent Tester", measure the leakage current from each exposedmetal part of the cabinet, particularly any exposed metal parthaving a return path to the chassis, to a known good earthground (water pipe, etc.). Any leakage current must not exceed0.5mA AC (r.m.s.).However, in tropical area, this must not exceed 0.2mA AC(r.m.s.).
Alternate Check MethodPlug the AC line cord directly into the AC outlet (do not use a lineisolation transformer during this check.). Use an AC voltmeterhaving 1000 ohms per volt or more sensitivity in the followingmanner. Connect a 1500 10W resistor paralleled by a 0.15 FAC-type capacitor between an exposed metal part and a knowngood earth ground (water pipe, etc.). Measure the AC voltageacross the resistor with the AC voltmeter. Move the resistorconnection to each exposed metal part, particularly any exposedmetal part having a return path to the chassis, and measure theAC voltage across the resistor. Now, reverse the plug in the ACoutlet and repeat each measurement. Any voltage measuredmust not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mAAC (r.m.s.).However, in tropical area, this must not exceed 0.3V AC (r.m.s.).This corresponds to 0.2mA AC (r.m.s.).
0.15μF AC-TYPE
1500 10W
GOOD EARTH GROUND
PLACE THIS PROBEON EACH EXPOSEDMETAL PART
AC VOLTMETER(HAVING 1000 /V,OR MORE SENSITIVITY)
No.51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
5
FEATURES1. It is a remte controlled color television.
2. 100 programs from VHF, UHF bands or cable channels can be
preset.
3. It can tune cable channels.
4. Controlling the TV is very easy by its menu driven system.
5. It has two Euroconnector sockets for external device (such as
video recorder, video games, audio set, etc.)
6. Front AV Input available.
7. Stereo sound systems (German + Nicam) are available.
8. Full function Teletext (Fastext, Toptext).
9. It is possible to connect headphone.
10. Direct channel access.
11. APS (Automatic Programming System).
12. All programs can be named.
13. Forward or backward automatic tuning.
14. Automatic sound mute when no transmission.
15. 5 minutes after the broadcasting (closedown), the TV switches
itself automatically to stand-by mode.
MAIN DIFFERENCE LISTMODEL No.
Parts NameAV28BT7ENS
(Silver)AV28BT7ENB
(Black)AV28BT7EES
(Silver)AV28BT7EEB
(Black)AV28BT7EPS
(Silver)AV28BT7EPB
(Black)
MAIN PWB VE-20073586 VE-20073447 VE-20081473
F CARTON BOX VE-20083462 VE-20083400 VE-20083464 VE-20083469 VE-20083471 VE-20083484
INST BOOK VE-20083463 VE-20083402 VE-20083466 VE-20083468 VE-20083470 VE-20083483
RATING LABEL VE-20083403 VE-20083401 VE-20083465 VE-20083467 VE-20083482 VE-20083485
FRONT CABINET VE-20082289 VE-20081489 VE-20082289 VE-20081489 VE-20082289 VE-20081489
BACK COVER VE-20082322 VE-20069017 VE-20082322 VE-20069017 VE-20082322 VE-20069017
TV RF system B/G B/G, D/K,K1 B/G,L/L’
TV PAL PAL / SECAMColoursystem
VIDEOPALNTSC 3.58NTSC 4.43
PAL / SCAMNTSC 3.58NTSC 4.43
No.51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
6
SPECIFIC SERVICE INSTRUCTIONSDISASSEMBLY PROCEDUREREMOVING THE REAR COVER1. Remove the 8 screws marked A.
2. Withdraw the rear cover toward you.
REMOVING THE FRONT AV + HEADPHONE JACKBOARD ASS’Y
After removing the rear cover.
1. Remove the 2 screws marked B, and remove the FRONT AV +
HEADPHONE JACK BOARD ASS’Y.
REMOVING THE FRONT CONTROL PWB After removing the rear cover.
1. Remove the MAIN PWB ASS’Y.
2. Remove the 5 screws marked C, and remove the FRONT
CONTROL PWB.
REMOVING THE SPEAKER After removing the rear cover.
1. Remove the 4 screws marked D, and remove the SPEAKER.
2. Remove an opposite side similarly.
REMOVING THE MAIN PWB After removing the rear cover.
1. Draw out back and remove the MAIN PWB ASS’Y,
CAUTIONS)
Be careful enough when developing a main chassis.
The wire of a POWER TRANSFER does not separate
and short-circuit with other parts.
No.51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
7
REAR COVER
SPEAKER
D
MAIN PWB
FRONT CABINET
FRONT AV +HEADPHONE JACKPWB
FRONTCONTROLPWB
B
C
D
SPEAKER
A(×8)
(×4)
(×5)
(×2)
(×4)
No.51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
8
SETTING OF THE LAST MEMORY FOR SHIPMENT■■■■ USER SETTING VALUES
Setting Item Setting Value Setting Item Setting Value
SOUND MENU FEATURE MENU
BASS CENTER SLEEP TIMER OFF
TREBLE ↑ CHILD LOCK OFF
BALANCE ↑
EFFECT OFF
PICTURE MENU INSTALL-> TV CONFIG. MENU
BRIGHTNESS LANGUAGE ENGLISH
COLOUR COUNTRY ?
CONTRAST AV-2 OUTPUT TV
SHARPNESS
HUE (only NTSC)
These adjust are automatically
restored when APS bit in Service
menu is set.
The procedure for setting APS
bit is described bellow.
PICTURE MODE AUTO
■ SETTING APS BIT IN SERVICE MENU1) Enter service menu in TV mode by pressing “INFO” and “MUTING” keys simultaneously. Service Menu will appear.
2) Select OPTIONS by pressing Up/Down keys on remote control unit.
3) Enter OPTIONS by pressing Left/Right keys on remote control unit.
4) Select OPTION 8 by pressing Up/Down keys on remote control unit.
5) Selected bit in one OPTION is shown by blinking character. Select B2 by pressing Left/Right keys on remote control unit.
DO NOT CHANGE ANY OTHER BIT.
6) Press digit key “1” to set APS bit.
7) Press “STANDARD” key on remote control unit to exit service mode.
No. 51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
9
SERVICE ADJUSTMENTSADJUSTMENT PREPARATION1. You can make the necessary adjustments for this unit with
either the Remote Control Unit or With the adjustment tools
and parts as given below.
2. Adjustment with the Remote Control Unit is made on the
basis of the initial setting values, however, the new setting
values which set the screen to its optimum condition may
differ from the initial settings.
3. Make sure that AC power is turned on correctly.
4. Turn on the power for set and test equipment before use, and
start the adjustment procedures after waiting at least 30 minutes.
5. Unless otherwise specified, prepare the most suitable reception
or input signal for adjustment.
6. Never touch any adjustment parts which are not specified in the
list for this adjustment - variable resistors, transformers,
condensers, etc.
7. Presetting before adjustment.
Unless otherwise specified in the adjustment instructions, preset
the following functions with the remote control unit:
VIDEO STATUS STANDARD
TINT/COLOR
PICTURE/BRIGHT
DETAIL
CENTER
ADJUSTMENT EQUIPMENT1. DC voltmeter (or digital voltmeter)
2. Signal generator (Pattern generator)[PAL/SECAM/NTSC]
3. Remote control unit
MAIN PARTS LOCATIONS
IC501MICOM
IC502
MEMORY IC
TUNER AV-1 AV-2
MULTI SOUND PWBFBT
UPPER : FOCUS VRLOWER : SCREEN VR
B1(Indicated [150/115V]on the bottom side)
VOL
(+)(+)(+)(+) (-)(-)(-)(-)PROG
/Ch.
(+)(+)(+)(+) (-)(-)(-)(-)MENULED REMOCON
RECEIVER
FRONT
TOPFRONT
AUDIO.
VIDEO R L
HEADPHONE JACK
SCARTjack
SCARTjack
No. 51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
10
BASIC OPERATION SERVICE MENU■■■■ HOW TO ENTER THE SERVICE MODE1) Press the INFORMATION key and MUTING key of
REMOTE CONTROL UNIT simultaneously.
■■■■ SELECTION OF ADJUSTMENT ITEMS1) Press the UP ( ) or DOWN ( ) key and select
the service menu item.
2) Press the RIGHT ( ) or LEFT ( ) key and
enter ADJUSTMENT SCREEN.
3) Select the ADJUST No., use RIGHT ( ) / LEFT ( )
key of remote control unit.
4) To change the selected parameter, use RIGHT ( )
and LEFT ( ) key.
■ HOW TO EXIT SERVICE MODE
1) Press the STANDARD Key on REMOTE CONTROL UNIT.
■■■■ ADJUSTMENT SERVICE MENU
ADJUSTMENT ITEM ADJUSTNo.
DISCRIPTION
00 White Point RED
01 White Point GREENWHITE BALANCE
02 White Point BLUE
AGC 03 AGC
IF-PLL NEGATIVE 04 IF-PLL Negative
IF-PLL POSITIVE 05 IF-PLL Positive
06 Y-Delay PAL
07 Y-Delay SECAMLUMINANCE DELAY
08 Y-Delay NTSC
10 4 : 3 PICTURE MODEVERTICAL ZOOM
21 16 : 9 PICTURE MODE
11 4 : 3 PICTURE MODEVERTICAL SCROLL
22 16 : 9 PICTURE MODE
12 4 : 3 PICTURE MODE4 : 3 HORIZONTAL SHIFT
23 16 : 9 PICTURE MODE
13 4 : 3 PICTURE MODEVERTICAL SLOPE
24 16 : 9 PICTURE MODE
14 4 : 3 PICTURE MODEVERTICAL AMPLITUDE
25 16 : 9 PICTURE MODE
15 4 : 3 PICTURE MODES-CORRECTION
26 16 : 9 PICTURE MODE
16 4 : 3 PICTURE MODEVERTICAL SHIFT
27 16 : 9 PICTURE MODE
17 4 : 3 PICTURE MODEEW WIDTH
28 16 : 9 PICTURE MODE
18 4 : 3 PICTURE MODEEW PARABOLA WIDTH
29 16 : 9 PICTURE MODE
19 4 : 3 PICTURE MODEEW CORNER PARABOLA
30 16 : 9 PICTURE MODE
20 4 : 3 PICTURE MODEEW TRAPEZIUM
31 16 : 9 PICTURE MODE
SERVICE
ADJUST…..
OPTIONS…..
SERVICE MENU SCREEN
ADJUST *** ******
***
OUT UP
ADJUSTMENT SCREEN
SERVICEMENU ITEM
ADJUST No.
PARAMETERPARAMETERVALUE
REMOTE CONTROL UNIT key NAME
MUTING key
UP / DOWN( / ) key
INFORMATIONkey
STANDARD key
RIGHT / LEFT( / ) key
No. 51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
11
ADJUSTMENTS
ItemMeasuringinstrument Test point Adjustment part Description
SCREENVOLTAGEAdjustment
SignalGenerator
RemoteControlunit
SCREEN VR
[FBT]
OPTION 02
1. Receive a PAL colour bar.
2. Enter the option settings in the SERVICE MENU.
3. Press the UP / DOWN ( ▲/ ▼) key, and Enter Option 02.
4. To change bit 6, come on to it by using L / R ( / ) key and
make it “1” by pressing “1” white bit 2 is blinking.
5. Observe the thin horizontal blue-white line in the middle of the
screen, and adjust the lower VR of the FBT, until the line is in
its thinnest visible thickness.
6. Then make Option 02 bit 6 “0” , by pressing “0” on the remote
control unit, although you do not see any picture.
FOCUSAdjustment
Signalgenerator
FOCUS VR
[FBT]
1. Receive a PAL circle pattern.
2. Adjust the upper VR of the FBT, until you get the Optinum
focus, the sharpest picture.
B1VOLTAGEcheck
DC
Voltmeter
Marked
[150/115V]
on the
MAIN PWB
1. Check whether the voltage at the point named and silk
screened as “150 / 115V” on the MAIN PWB is 150V DC.
SERVICE
ADJUST…..
OPTIONS…..
SERVICE MENU
SELECT OPTION menu
FOCOUS
SCREEN
FBT
No. 51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
12
Item Measuringinstruments
Test point Adjustment part Description
WHITE
BALANCE
Signal
generator
ADJUST 00
(White point- RED)
ADJUST 01
(White point- GREEN)
ADJUST 02
(White point - BLUE)
[LOW LIGHT]
1. Receive a whole black signal.
2. Adjust the <Adjust 00>, <Adjust 01>, <Adjust 02>, in the
SERVICE MENU so that the entire screen do not shine black.
[HIGH LIGHT]
1. Receive a white and black signal (colour off).
2. Adjust the <Adjust 00>, <Adjust 01>, <Adjust 02>, in the
SERVICE MENU so that the whiteness in the screen become
sharp.
AGC
Adjustment
DC
voltmeter
ADJUST 03 1. Receive a any broadcast.
2. Select <ADJUST 03> from SERVICE MENU
3. Connect a DC voltmeter to pin 1 of the tuner. Change the
AGC parameter until you see 3.70V DC on voltmeter display.
IF-PLL
NEGATIVE
Adjustment
ADJUST 04 1. Select <ADJUST 04> from SERVICE MENU.
2. Adjustment value is set to 80 as a default value.
IF-PLL
POSITIVE
Adjustment
ADJUST 05 1. Select <ADJUST 05> from SERVICE MENU.
2. Adjustment value is set to 80 as a default value.
No. 51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
13
Item Measuringinstruments
Test point Adjustment part Description
Adjust 06 [ Y-Delay PAL ]
1. Receive a PAL colour bar signal.
2. Select <Adjust 06> from SERVICE MENU.
3. Adjust Y-Delay PAL till the colour transients on the colour
bar of the pattern become as sharper and colours between
transients do not mix with each other as possible.
Note: If the SAW filter is one of the G1965M, J1951M, K2958M,
K2962M, G3957M, K6256K, K6259K or M1963M, there is
constant group delay distortion, so for an equal delay of
the luminance and chrominance signal the delay must be
set at a value of 160nS. This means the adjustment must
be set to the maximum value.
Adjust 07 [ Y-Delay SECAM ]
1. Receive a SECAM colour bar signal.
2. Select <Adjust 07> from SERVICE MENU.
3. Adjust Y-Delay SECAM till the colour transients on the
colour bar of the pattern become as sharper and colours
between transients do not mix with each other as possible.
Note: If the SAW filter is one of the G1965M, K2958M,
K2962M, G3957M, K6256K or K6259K, there is constant
group delay distortion, so for an equal delay of the
luminance and chrominance signal the delay must be set
at a value of 160nS. This means the adjustment must be
set to the maximum value.
LUMINANCE
DELAY
Adjustment
Signal
generator
Adjust 08 [ Y-Delay NTSC ]
1. Receive a NTSC colour bar signal.
2. Select <Adjust 08> from SERVICE MENU.
3. Adjust Y-Delay NTSC till the colour transients on the colour
bar of the pattern become as sharper and colours between
transients do not mix with each other as possible.
Note: If the SAW filter is M1963M, there is constant group delay
distortion, so for an equal delay of the luminance and
chrominance signal the delay must be set at a value of
160nS. This means the adjustment must be set to the
maximum value.
No. 51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
14
Item Measuringinstruments
Test point Adjustment part Description
VERTICAL
ZOOM
Adjustment
Signal
generator
Adjust 10 ( 4 : 3 )
Adjust 21 ( 16 : 9 )
1. Receive a PAL circle test pattern.
2. Set < 4 : 3 aspect mode >.
3. Select < ADJUST 10 > from SERVICE MENU.
4. Change vertical zoom till you see the upper and olwer limit
of the circle as close to the upper and lower limit of the
picture tube as possible.
5. Set < 16 : 9 aspect mode >.
6. Adjusts with the step which is the same above from 3 to 4
about the 16 : 9 aspect mode, too.
VERTICAL
SCROLL
Adjustment
Signal
generator
Adjust 11 ( 4 : 3 )
Adjust 22 ( 16 : 9 )
1. Receive a PAL circle test pattern.
2. Set < 4 : 3 aspect mode >.
3. Select < ADJUST 11 > from SERVICE MENU.
4. Change vertical scroll till you see the circle exactly un the
middle of the screen.
5. Set < 16 : 9 aspect mode >.
6. Adjusts with the step which is the same above from 3 to 4
about the 16 : 9 aspect mode, too.
4 : 3
HORIZONTAL
SHIFT
Adjustment
Signal
generator
Adjust 12 ( 4 : 3 )
Adjust 23 ( 16 : 9 )
1. Receive a RED PURITY test pattern.
2. Set < 4 : 3 aspect mode >.
3. Select < ADJUST 12 > from SERVICE MENU.
4. Change horizontal shift till the picture is horizontally
centered. Check whether this adjustment is correct after
completing Service Mode Adjustment.
5. Set < 16 : 9 aspect mode >.
6. Adjusts with the step which is the same above from 3 to 4
about the 16 : 9 aspect mode, too.
VERTICAL
SLOPE
Adjustment
Signal
generator
Adjust 13 ( 4 : 3 )
Adjust 24 ( 16 : 9 )
1. Receive a CROSS-HATCH signal.
2. Set < 4 : 3 aspect mode >.
3. Select < ADJUST 13 > from SERVICE MENU.
4. Change vertical slope till the size of squares on both the
upper and lower part of test pattern become equal to the
squares laying on the vertical centre of the test pattern.
5. Check and readjust VERTICAL SLOPE item if the
adjustment becomes improper after some other geometric
adjustments are done.
6. Set < 16 : 9 aspect mode >.
7. Adjusts with the step which is the same above from 3 to 5
about the 16 : 9 aspect mode, too.
VERTICAL
AMPLITUDE
Adjustment
Signal
generator
Adjust 14 ( 4 : 3 )
Adjust 25 ( 16 : 9 )
1. Receive a PAL test pattern signal.
2. Set < 4 : 3 aspect mode >.
3. Select < ADJUST 14 > from SERVICE MENU.
4. Change vertical slope till horizontal black lines on both the
upper and lower part of the test pattern become very close
to the upper and lower horizontal sides of picture tube and
nearly about to disappear.
5. Check and readjust VERTICAL AMPLITUDE item if the
adjustment becomes improper after some other geometric
adjustments are done.
6. Set < 16 : 9 aspect mode >.
7. Adjusts with the step which is the same above from 3 to 5
about the 16 : 9 aspect mode, too.
No. 51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
15
Item Measuringinstrument
Test point Adjustment part Description
S-CORRECTION
Adjustment
Signal
generator
Adjust 15 ( 4 : 3 )
Adjust 26 ( 16 : 9 )
1. Receive a PAL circle pattern signal.
2. Set < 4 : 3 aspect mode >.
3. Select < ADJUST 15 > from SERVICE MENU.
4. Change S-correction till the middle part of the circle is round
as possible.
5. Set < 16 : 9 aspect mode >.
6. Adjusts with the step which is the same above from 3 to 4
about the 16 : 9 aspect mode, too.
VERTICALSHIFT
Adjustment
Signal
generator
Adjust 16 ( 4 : 3 )
Adjust 27 ( 16 : 9 )
1. Receive a PAL test pattern signal ( or the symmetrical signal
in the top and the bottom and on either side to find ).
2. Set < 4 : 3 aspect mode >.
3. Select < ADJUST 16 > from SERVICE MENU.
4. Change Vertical Shift till the test pattern is vertically centred,
i.e. horizontal line at the centre pattern is in equal distance
both to upper and lower side of the picture tube.
5. Check and readjust Vertical Shift item if the adjustment
becomes improper after some other geometric adjustments
are done.
6. Set < 16 : 9 aspect mode >.
7. Adjusts with the step which is the same above from 3 to 5
about the 16 : 9 aspect mode, too.
EW WIDTH
Adjustment
Signal
generator
Adjust 17 ( 4 : 3 )
Adjust 28 ( 16 : 9 )
1. Receive a PAL test pattern signal.
2. Set < 4 : 3 aspect mode >.
3. Select < ADJUST 17 > from SERVICE MENU.
4. Change EW Width till the vertical black and white bars on
both left and right side of the pattern exactly disappear.
5. Set < 16 : 9 aspect mode >.
6. Adjusts with the step which is the same above from 3 to 4
about the 16 : 9 aspect mode, too.
EWPARABOLAWIDTH
Adjustment
Signal
generator
Adjust 18 ( 4 : 3 )
Adjust 29 ( 16 : 9 )
1. Receive a PAL test pattern signal.
2. Set < 4 : 3 aspect mode >.
3. Select < ADJUST 18 > from SERVICE MENU.
4. Change EW Parabola Width till vertical lines close to the both
sides of the picture frame become parallel to vertical side of
picture tube.
5. Check and readjust EW Parabola Width item if the
adjustment becomes improper after some other geometric
adjustments are done.
6. Set < 16 : 9 aspect mode >.
7. Adjusts with the step which is the same above from 3 to 5
about the 16 : 9 aspect mode, too.
EW CORNERPARABOLA
Adjustment
Signal
generator
Adjust 19 ( 4 : 3 )
Adjust 30 ( 16 : 9 )
1. Receive a PAL test pattern signal.
2. Set < 4 : 3 aspect mode >.
3. Select < ADJUST 19 > from SERVICE MENU.
4. Change EW Corner Parabola till vertical lines at the corners
of both sides of picture frame become vertical and parallel to
vertical corner sides of picture tube.
5. Check and readjust EW Corner Parabola item if the
adjustment becomes improper after some other geometric
adjustments are done.
6. Set < 16 : 9 aspect mode >.
7. Adjusts with the step which is the same above from 3 to 5
about the 16 : 9 aspect mode, too.
No. 51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
16
Item Measuringinstrument
Test point Adjustment part Description
EW
TRAPEZIUM
Adjustment
Signal
generator
Adjust 20 ( 4 : 3 )
Adjust 31 ( 16 : 9 )
1. Receive a PAL circle pattern signal.
2. Set < 4 : 3 aspect mode >.
3. Select < ADJUST 20 > from SERVICE MENU.
4. Change EW Trapezium till vertical lines, especially lines at
the sides of the picture frame became parallel to the both
sides of picture tube as possible.
5. Check and readjust EW Trapezium item if the adjustment
becomes improper after some other geometric adjustment.
6. Set < 16 : 9 aspect mode >.
7. Adjusts with the step which is the same above from 3 to 5
about the 16 : 9 aspect mode, too.
No. 51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
17
PARTS LISTCONTENTS
USING PW BOARD & REMOTE CONTROL UNIT ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・17
EXPLODED VIEW PARTS LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・18
EXPLODED VIEW ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・19
PRINTED WIRING BOARD PARTS LIST
MAIN PW BOARD ASS'Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・20
MULTI SOUND PW BOARD ASS’Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・25
CRT SOCKET PW BOARD ASS'Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・26
FRONT CONTROL PW BOARD ASS’Y・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・26
FRONT AV + HEADPHONE JACK PW BOARD ASS’Y・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・26
PROTECTION MODULE PW BOARD ASS’Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・26
T(SPOT KILLER) MODULE PW BOARD ASS’Y・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・26
MAIN PW BOARD ASS'Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・27
MAIN PW BOARD ASS'Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・32
MULTI SOUND PW BOARD ASS’Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・37
PACKING / PACKING PARTS LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・39
USING PW BOARD & REMOTE CONTROL UNIT
Model
PWB ASS'Y
AV28BT7ENSAV28BT7ENB
AV28BT7EESAV28BT7EEB
AV28BT7EPSAV28BT7EPB
MAIN PWB VE-20073586 VE-20073447 VE-20071473
MULTI SOUND PWB VE-20078991 VE-20079020
CRT SOCKET PWB VE-20074437
FRONT CONTROL PWB VE-20001612
FRONT AV + HEADPHONEJACK PWB
VE-20083646
PROTECTION MODULE PWB VE-20058569
T(SPOT KILLER) MODELE PWB VE-20019598
REMOTE CONTROL UNIT RM-C85
[ AV28BT7EPS / AV28BT7EPB]
[ AV28BT7ENS / AV28BT7ENB]
[ AV28BT7EES / AV28BT7EEB]
No. 51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
18
EXPLODED VIEW PARTS LIST
[ SILVER model : AV28BT7ENS, AV28BT7EES, AV28BT7EPS]
[ BLACK model : AV28BT7ENB, AV28BT7EEB, AV28BT7EPB ]
No. 51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
19
EXPLODED VIEW
MAIN PWB
V01
17
5
11
11
FRONT AV +HEADPHONE JACKPWB
FRONTCONTROLPWB
6
3
12
4
7
8
910
1213
14
15
16
13
12
No. 51883
AV28BT7ENS / AV28BT7ENB
20
PRINTED WIRING BOARD PARTS LIST
MAIN P.W. BOARD ASS’Y (VE-20073586)
[ AV28BT7ENS / AV28BT7ENB ]
No. 51883
AV28BT7ENS / AV28BT7ENB
21
[ AV28BT7ENS / AV28BT7ENB ]
No. 51883
AV28BT7ENS / AV28BT7ENB
22
[ AV28BT7ENS / AV28BT7ENB ]
No. 51883
AV28BT7ENS / AV28BT7ENB
23
°
°
[ AV28BT7ENS / AV28BT7ENB ]
No. 51883
AV28BT7ENS / AV28BT7ENB
24
[ AV28BT7ENS / AV28BT7ENB ]
No. 51883
AV28BT7ENS / AV28BT7ENB
25
MULTI SOUND P.W. BOARD ASS’Y (VE-20078991)
[ AV28BT7ENS / AV28BT7ENB ]
No. 51883
AV28BT7ENS / AV28BT7ENB
26
CRT SOCKET P.W. BOARD ASS’Y (VE-20074437)
FRONT CONTROL P.W. BOARD ASS’Y
(VE-20001612)
FRONT AV + HEADPHONE JACK P.W. BOARDASS’Y (VE-20083646)
PROTECTION MODULE P.W. BOARD ASS’Y
(VE-20058569)
T(SPOT KILLER) MODULE P.W. BOARD ASS’Y
(VE-20019598)
[ AV28BT7ENS / AV28BT7ENB ]
No. 51881
AV28BT7EES / AV28BT7EEB
27
PRINTED WIRING BOARD PARTS LIST
MAIN P.W. BOARD ASS’Y (VE-20073447)
[ AV28BT7EES / AV28BT7EEB ]
No. 51881
AV28BT7EES / AV28BT7EEB
28
[ AV28BT7EES / AV28BT7EEB ]
No. 51881
AV28BT7EES / AV28BT7EEB
29
[ AV28BT7EES / AV28BT7EEB ]
No. 51881
AV28BT7EES / AV28BT7EEB
30
°
°
[ AV28BT7EES / AV28BT7EEB ]
No. 51881
AV28BT7EES / AV28BT7EEB
31
MULTI SOUND P.W. BOARD ASS’Y (VE-20078991)
Refer to PARTS LIST in page 24 for this P.W. board.
CRT SOCKET P.W. BOARD ASS’Y (VE-20074437)
Refer to PARTS LIST in page 25 for this P.W. board.
FRONT CONTROL P.W. BOARD ASS’Y
(VE-20001612)
Refer to PARTS LIST in page 25 for this P.W. board.
FRONT AV + HEADPHONE JACK P.W. BOARDASS’Y (VE-20083646)
Refer to PARTS LIST in page 25 for this P.W. board.
PROTECTION MODULE P.W. BOARD ASS’Y
(VE-20058569)
Refer to PARTS LIST in page 25 for this P.W. board.
T(SPOT KILLER) MODULE P.W. BOARD ASS’Y
(VE-20019598)
Refer to PARTS LIST in page 25 for this P.W. board.
[ AV28BT7EES / AV28BT7EEB ]
No. 51883
AV28BT7EPS / AV28BT7EPB
32
PRINTED WIRING BOARD PARTS LIST
MAIN P.W. BOARD ASS’Y (VE-20071473)
[ AV28BT7EPS / AV27BT7EPB ]
No. 51883
AV28BT7EPS / AV28BT7EPB
33
[ AV28BT7EPS / AV28BT7EPB ]
No. 51883
AV28BT7EPS / AV28BT7EPB
34
[ AV28BT7EPS / AV28BT7EPB ]
No. 51883
AV28BT7EPS / AV28BT7EPB
35
°
°
[ AV28BT7EPS / AV28BT7EPB ]
No. 51883
AV28BT7EPS / AV28BT7EPB
36
[ AV28BT7EPS / AV28BT7EPB ]
No. 51883
AV28BT7EPS / AV28BT7EPB
37
MULTI SOUND P.W. BOARD ASS’Y (VE-20079020)
[ AV28BT7EPS / AV28BT7EPB ]
No. 51883
AV28BT7EPS / AV28BT7EPB
38
CRT SOCKET P.W. BOARD ASS’Y (VE-20074437)
Refer to PARTS LIST in page 25 for this P.W. board.
FRONT CONTROL P.W. BOARD ASS’Y
(VE-20001612)
Refer to PARTS LIST in page 25 for this P.W. board.
FRONT AV + HEADPHONE JACK P.W. BOARDASS’Y (VE-20083646)
Refer to PARTS LIST in page 25 for this P.W. board.
PROTECTION MODULE P.W. BOARD ASS’Y
(VE-20058569)
Refer to PARTS LIST in page 25 for this P.W. board.
T(SPOT KILLER) MODULE P.W. BOARD ASS’Y
(VE-20019598)
Refer to PARTS LIST in page 25 for this P.W. board.
[ AV28BT7EPS / AV28BT7EPB ]
No. 51883
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
39
1
3
2
2
5 6 7
4
8
PACKING
PACKING PARTS LIST
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STANDARD CIRCUIT DIAGRAM
NOTE ON USING CIRCUIT DIAGRAMS1.SAFETY
The components identified by the symbol and shading arecritical for safety. For continued safety replace safety critical components only with manufactures recommended parts.
2.SPECIFIED VOLTAGE AND WAVEFORM VALUESThe voltage and waveform values have been measured under the following conditions.
(1)Input signal : Colour bar signal
(2)Setting positions of each knob/button and variable resistor
(3)Internal resistance of tester :DC 20k /V
(4)Oscilloscope sweeping time :H 20µS/div
:V 5mS/div
:Others Sweeping time is specified
(5)Voltage values :All DC voltage values
Since the voltage values of signal circuit vary to some extent according to adjustments, use them as reference values.
3.INDICATIONS ON THE CIRCUIT DIAGRAM(1)Resistors
Resistance value
No unit :[ ]
K :[K ]M
Type
No indication :Carbon resistorOMR :Oxide metal film resistorMFR :Metal film resistorMPR :Metal plate resistorUNFR :Uninflammable resistorFR :Fusible resistor
Composition resistor 1/2 [W] is specified as 1/2S or Comp.
(2)Capacitors
: Original setting position when shipped
4.NOTE FOR REPAIRING SERVICEThis model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE side GND and the ISOLATED(NEUTRAL) side GND.Therefore, care must be taken for the following points.
(1)Do not touch the LIVE side GND or the LIVE side GND and the ISOLATED(NEUTRAL) side GND simultaneously. If the above caution is not respected, an electric shock may be caused. Therefore, make sure that the power cord is surely removed from the receptacle when, for example, the chassis is pulled out.
(2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or never measure with a measuring apparatus measure with a measuring apparatus ( oscilloscope, etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND at the same time. If the above precaution is not respected , a fuse or any parts will be broken.
Since the circuit diagram is a standard one, the circuit and circuit constants may be subject to change for improvement without any notice.
NOTEDue improvement in performance, some part numbers show in the circuit diagram may not agree with those indicated in the part list.When ordering parts, please use the numbers that appear in the Parts List.
Type
MM :Metalized mylar capacitorPP :Polypropylene capacitorMPP :Metalized polypropylene capacitorMF :Metalized film capacitorTF :Thin film capacitorBP :Bipolar electrolytic capacitorTAN :Tantalum capacitor
(3)Coils
No unit :[ µH]
Others :As specified
:[M ]
Capacitance value
1 or higher :[pF]less than 1 :[µF]
Withstand voltageNo indication :DC50[V]
Others :DC withstand voltage [V]
AC indicated :AC withstand voltage [V] Electrolytic Capacitors
47/50[Example]:Capacitance value [µF]/withstand voltage[V]
No indication :Ceramic capacitor
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPBQ802 D
8Vp-p(H) 1.7Vp-p(H) 0.7Vp-p(H) 1.4Vp-p(H)
0.7Vp-p(H) 0.8Vp-p(H) 0.9Vp-p(H) 2Vp-p(H)
2Vp-p(H) 2Vp-p(H) 1Vp-p(H) 450Vp-p(H)
0.6Vp-p(V) 4.8Vp-p(V) 0.5Vp-p(V) 1.2Vp-p
35Vp-p(H) 35Vp-p(H) 35Vp-p(H)
IC401 6pin IC050 6pin IC050 17pin
IC401 17pin
IC901 9pinIC901 8pinIC901 7pin
IC501 34pinIC701 9pinIC401 47pin IC701 1pin
Q605 CIC401 40pin
IC401 29pin IC401 19pin
IC401 20pin
IC401 30pin
IC401 21pin
MAIN PWB
CRT SOCKET PWB
WAVEFORM DIAGRAMS
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CONTENTSSEMICONDUCTOR SHAPES 2-2
BLOCK DIAGRAMWAVEFORM DIAGRAMS
2-3
2-4
CIRCUIT DIAGRAMS2-52-72-92-92-9
PATTERN DIAGRAMS
VOLTAGE TABLES
MAIN PWB CIRCUIT DIAGRAMMULTISOUND PWB CIRCUIT DIAGRAMCRT SOCKET PWB CIRCUIT DIAGRAMFRONT CONTROL PWB CIRCUIT DIAGRAMFRONT AV + HEADPHONE JACK PWB CIRCUIT DIAGRAM
MAIN PWB PATTERNMULTISOUND, CRT SOCKET & FRONT CONTROL PWB PATTERNFRONT AV + HEADPHONE JACK PWB PATTERN
2-112-13
2-15
SEMICONDUCTOR SHAPESTRANSISTOR
BOTTOM VIEW FRONT VIEW TOP VIEW
CHIP TR
ICBOTTOM VIEW FRONT VIEW TOP VIEW
CHIP IC
TOP VIEW
1 N
N1
OUT
E
ININ OUTE
1 N
N
1
N
N
N
1
N
ECB
E C B
C
B EB C E
(G)(D)(S) E C BE C B
2-13
TV
-TE
XT
CO
NT
RO
LLE
RS
DA
555
X
PLL
TU
NE
RU
V13
15/6
SE
RV
ICE
CO
NN
EC
TOR
CT
I &C
OM
B F
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108
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I2C
AU
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2614
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SM
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4604
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MK
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PAD
VID
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ITC
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6415
VE
RT
ICA
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115/
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.12
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DC
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t-by
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st-
by
SC
AR
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SC
AR
T2
SV
HS
VID
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PR
OC
ES
SO
RT
DA
884
X
MS
P 3
4X0D
DIG
ITA
L S
OU
ND
PR
OC
ES
SO
R
BLOCK DIAGRAM
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CIRCUIT DIAGRAMS
MAIN PWBVE-20073447(AV28BT7EES/EEB) VE-20073586(AV28BT7ENS/ENB) VE-20071473(AV28BT7EPS/EPB)
MAIN PWB CIRCUIT DIAGRAM
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MULTISOUND PWB CIRCUIT DIAGRAM
MULTISOUND PWBVE-20078991(AV28BT7ENS/ENB, AV28BT7EES/EEB)VE-20079020(AV28BT7EPS/EPB)
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CRT SOCKET PWB CIRCUIT DIAGRAM
FRONT AV + HEAD PHONE JACK PWB CIRCUIT DIAGRAM FRONT CONTROL PWB CIRCUIT DIAGRAM
CRT SOCKET PWBVE-20074437
FRONT AV + HEAD PHONE JACK PWB VE-20083646
FRONT CONTROL PWBVE-20001612
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VOLTAGE TABLESMAIN PWB IF PWB
CRT SOCKET PWB
IC050
IC401
PIN NO.12345678910
PIN NO.12345678910111213141516171819202122232425262728
PIN NO.123
PIN NO.456
PIN NO.29303132333435363738394041424344454647484950515253545556
PIN NO.11121314151617181920
E(D) C(S) B(G)Q055 2.4 7.8 3.0Q100 0 12.6 0
0Q501Q503
11.93.3 3.3
02.5
Q512 5.4 3.4 4.8Q514 0 4.8 0Q515 4.8 3.2 2.4Q516 3.2 4.8 2.4Q517 4.5 3.2 2.4Q518 3.2 4.8 2.4Q601Q603
0 00
0.1
Q605 0 ---3.10
Q701 0.1
15.2
0 0.4Q702 0 0 0.6Q802 167 0 0.1Q805 0 0 0.6Q806 0 0 0.6Q807 0 11.5 0
Q809Cathode:11.3VAnode:0VControl terminal:2.4V
Note)Although the symbol numbers of the level drive transistor and level outputtransistor are indicated as Q604 and Q606 on the wiring diagram, the numbersare indicated as Q601 and Q605 on the substrate, respectively. The followingtable shows the silk-printed symbol numbers on the substrate.
VOLTAGE2.84.52.94.82.93.20
2.97.94.0
VOLTAGE0.33.700
2.53.04.54.56.70.13.77.84.00
3.00
3.75.43.53.13.42.13.53.53.50.13.03.0
VOLTAGE12.511.5
0
VOLTAGE2.612.40.1
VOLTAGE2.42.42.42.40.32.52.54.77.82.85.00.10.93.14.00
3.02.32.34.64.62.03.83.84.32.32.93.3
VOLTAGE3.00
4.02.84.04.04.04.00
3.7
PIN NO.12345678
PIN NO.910111213141516
VOLTAGE12.412.10.10
0.90.10.20.2
VOLTAGE0.82.62.30.23.02.42.62.4
PIN NO.123
VOLTAGE2.1
12.53.3
PIN NO.123
VOLTAGE12.4
07.9
IC501PIN NO.
1234567891011121314151617181920212223242526
PIN NO.2728293031323334353637383940414243444546474849505152
VOLTAGE000
3.33.33.33.30
2.40
3.30.92.40
0.100
2.40.30.10
2.13.33.53.13.1
VOLTAGE000
3.33.33.33.30.50.50
2.40.30.20.30
2.40
3.30
3.33.33.33.33.33.33.3
IC307
PIN NO.1234567891011121314
PIN NO.1516171819202122232425262728
VOLTAGE3.23.24.90
0.12.42.42.20
2.70
2.15.00
VOLTAGE0.10
4.33.03.53.33.33.33.54.50
3.40.10.1
PIN NO.1234567891011121314151617181920212223242526272829303132
PIN NO.3334353637383940414243444546474849505152535455565758596061626364
VOLTAGE2.500
4.900
4.90
4.54.52.42.42.40.10.10.10
4.800000
4.90.10.1000000
VOLTAGE3.73.70
3.73.76.87.86.50
3.63.73.70
3.73.70
3.73.70
3.73.72.63.70
4.90.10.10.10
2.32.30
IC801
IC802
PIN NO.12345
PIN NO.6789
VOLTAGE2.32.3157.50
VOLTAGE45.27.70
7.5
IC701
PIN NO.12345
PIN NO.6789
VOLTAGE0
12.700
-12.6
VOLTAGE0
12.600
IC100
PIN NO.12345
PIN NO.6789
VOLTAGE3.22.93.20
6.0
VOLTAGE0.10.10.10.1
IC901
PIN NO.1234
PIN NO.5678
VOLTAGE0000
VOLTAGE0.10.13.33.3
IC502
PIN NO.1234
PIN NO.5678
VOLTAGE2.42.42.40
VOLTAGE4.92.42.42.4
IC304
IC804 IC805
PIN NO.123
VOLTAGE9.105
IC807
IC301
Q301E(D)4.8
C(S)4.8
B(G)4.1
AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB
Printed in JapanVP 0201DP2080
VICTOR COMPANY OF JAPAN, LIMITEDHOME AV NETWORK BUSINESS UNIT. 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa-prefecture, 221-8528, Japan
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