JVC AV-28KT1BUF/A, AV-28KT1BUF, AV-28KT1BUF/B, AV-28KT1BUF/C, AV-28KT1SUF Service Manual

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Page 1

SERVICE MANUAL

COLOUR TELEVISION

5213720039

AV-28KT1BUF/A, /B, /C,

AV-28KT1SUF

RM-C1100 TV

/A, /B, /C

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

TABLE OF CONTENTS

No.52137

2003/9

Page 2

SPECIFICATION

Items Contents

Dimensions ( W × H × D ) 76cm × 57cm × 47.3cm Mass 33kg TV RF System B/G, D/K, L/L' Colour System TV Mode PAL / SECAM

Video Mode PAL / SECAM / NTSC 3.58 / NTSC 4.43 Sound System NICAM / A2 (Germany system) Teletext System FLOF (Fastext) / TOP (German system) Tuning System Frequency synthesizer tuning system Number of CH memory position 100 ch Receiving

Frequency

Intermediate Frequency

Colour Sub Carrier Frequency PAL (4.43MHz), SECAM (4.43MHz), NTSC (3.58MHz/4.43MHz) Power Input AC220V ~ AC240V, 50Hz Power Consumption 120W(Max), 3W(Standby) Aerial Input Terminal 75Ω unbalanced, coaxial Picture Tube Visible size : 66cm (Measured diagonally) High Voltage 30kV Speaker Main:5.7cm × 16cm oval type × 2 Audio Output 10W + 10W Input Video 1V(p-p) 75Ω

Output Video 1V(p-p) 75Ω

Input Terminal Rear Side EXT-1 (Video / Audio / RGB)

Output Terminal Rear Side EXT-1 (Video / Audio)

Remote Control Unit VE-30017763 (RM-C1100), (AA/R06 dry battery × 2)

Design & specifications are subject to change without notice.

VHF Low 46.25MHz ~ 168.25MHz

VHF High 175.25MHz ~ 463.25MHz

UHF 471.25MHz ~ 863.25MHz

CATV S01-S41 & S75-S79

VIF 38.9MHz (B/G, D/K, L) / 33.9MHz (L')

SIF 33.4MHz (5.5MHz:B/G) / 32.9MHz (6.0MHz:D/K) / 32.4MHz (6.5MHz:L) / 40.4MHz (6.5MHz:L')

S-Video Y : 1V(p-p) positive

C : 0.286V(p-p)

Audio (L/R) 500mV(rms) (-4dBs), High impedance (RCA pin jack × 2)

Audio (L/R) 500mV(rms), Low Impedance

EXT-2 (Video / Audio / RGB / S-VHS)

Right Side EXT-3 (Video / Audio)

EXT-2 (Video / Audio)

Right Side Headphone Jack (Stereo mini jack Ø3.5mm × 1)

1-2 (No.52137)

Page 3

SECTION 1

PRECAUTION

1.1 SAFETY PRECAUTIONS

(1) The design of this product contains special hardware,

many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Service should be performed by qualified personnel only.

(2) Alterations of the design or circuitry of the products should

not be made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom.

(3) Many electrical and mechanical parts in the products have

special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the parts list of Service manual. Electrical components

having such features are identified by shading on the schematics and by ( ) on the parts list in Service manual. The use of a substitute replacement which does

not have the same safety characteristics as the recommended replacement part shown in the parts list of Service manual may cause shock, fire, or other hazards.

(4) Don't short between the LIVE side ground and

ISOLATED (NEUTRAL) side ground or EARTH side ground when repairing.

Some model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE : ( ) side GND, the ISOLATED (NEUTRAL) : ( ) side GND and EARTH : ( ) side GND. Don't short between the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND and never measure the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND at the same time with a measuring apparatus (oscilloscope etc.). 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 (See B1 POWER SUPPLY check).

(6) The high voltage appli ed to the picture tube must confo rm

with that specified in Service manual. Excessive high voltage can cause an increase in X-Ray emission, arcing and possible component damage, therefore operation under excessive high voltage conditions should be kept to a minimum, or should be prevented. If severe arcing occurs, remove the AC power immediately and determine the cause by visual inspection (incorrect installation, cracked or melted high voltage harness, poor soldering, etc.). To maintain the proper minimum level of soft X-Ray emission, components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the complete product.

(7) Do not check high voltage by d rawing an arc. Use a high

voltage meter or a high voltage probe with a VTVM. Discharge the picture tube before attempting meter connection, by connecting a clip lead to the gr ound frame and connecting the other end of the lead through a 10kΩ 2W resistor to the anode button.

(8) When service is required, obse rve the original lead dress.

Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement components.

(9) Isolation Check (Safety for Electrical Shock Hazard)

After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/audio input and output terminals, Control knobs, metal cabinet, screw heads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.

a) Dielectric Strength Test

The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any exposed metal part having a return path to the chassis should withstand a voltage of 3000V AC (r.m.s.) for a period of one second. (. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliance rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or more, for a period of one second.) This method of test requires a test equipment not generally found in the service trade.

b) Leakage Current Chec k

Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Using a "Leakage Current Tester", measure the leakage current from each exposed metal part of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground (water pipe, etc.). Any leakage current must not exceed 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.2mA AC (r.m.s.).

Alternate Check Method

Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Use an AC voltmeter having 1000Ω per volt or more sensitivity in the following manner. Connect a 1500Ω 10W resistor paralleled by a 0.15µF AC-type capacitor between an exposed metal part and a known good earth ground (water pipe, etc.). Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage ac ross the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measured must not exceed 0.75V AC (r.m.s.). This corresponds to

0.5mA AC (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.).

AC VOLTMETER (HAVING 1000 /V, OR MORE SENSITIVITY)

0.15 F AC-TYPE

PLACE THIS PROBE

1500 10W

GOOD EARTH GROUND

ON EACH EXPOSED METAL PART

(No.52137)1-3

Page 4

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 21-pin Euro connector (SCART) : EXT-1 / EXT-2 Pin No. Signal Designation Matching Value EXT-1 EXT-2

1 AUDIO R output 500mV(rms) (Nominal), Low impedance Used Used 2 AUDIO R input 500mV(rms) (Nominal), High impedance Used (R1) Used (R2) 3 AUDIO L output 500mV(rms) (Nominal), Low impedance Used Used 4 AUDIO GND --- Used Used 5 GND (B) --- Used Used 6 AUDIO L input 500mV(rms) (Nominal), High impedance Used (L1) Used (L2) 7 B input 700mV(B-W), 75 Ω Used Used 8 FUNCTION SW

(SLOW SW)

9 GND (G) --- Used Used 10 SCL / T-V LINK --- Not used Used (SCL / TV-LINK) 11 G input 700mV(B-W), 75 Ω Used Used 12 SDA3 --- Not used Not used 13 GND (R) --- Used Used 14 GND (YS) --- Used Used 15 R / C input R : 700mV(B-W), 75 Ω

16 Ys input

(FAST SW) 17 GND (VIDEO output) --- Used Used 18 GND (VIDEO input) --- Used Used 19 VIDEO output 1V 20 VIDEO / Y input 1V 21 COMMON GND --- Used Used

Low : 0V-3V, High : 8V-12V, High impedance

C : 300mV Low : 0V-0.4V, 75 Ω

High : 1V-3V, 75 Ω

(Negative sync), 75 Ω Used Used

(P-P)

(Negative sync), 75 Ω Used Used

(P-P)

, 75 Ω

Used Used

Used (R) Used (C2/R)

Used Used

(P-P= Peak to Peak, B-W= Blanking to white peak)

[Pin assignment]

20 18 16 14 12 10 8 6 4 2

21 19 17 15 13 11 9 7 5 3 1

1-4 (No.52137)

Page 5

2.2 FEATURES

• It is a remote controlled color television.

• 100 programs from VHF, UHF bands or cable channels can be preset.

• It can tune cable channels.

• Controlling the TV is very easy by its menu driven system.

• It has two Euroconnector sockets for external device (such as video recorder, video games, audio set, etc.)

• Side AV Input (EXT-3) available.

• Stereo sound systems (German + Nicam) are available.

• Full function Teletext (Fastext, Toptext).

• It is possible to connect headphone.

• Direct channel access.

• APS (Automatic Programming System).

• All programs can be named.

• Forward or backward automatic tuning.

• Sleep timer.

• Child Lock.

• Blue Background

•T-V Link

• Automatic sound mute when no transmission.

• 5 minutes after the broadcasting (close down), the TV switches itself automatically to stand-by mode.

• WSS (Wide Screen Signaling)

• NTSC Playback.

2.3 MAIN DIFFERENCE LIST Part Name AV-28KT1BUF AV-28KT1SUF

MODEL COLOUR BLACK MODEL SILVER MODEL FRONT CABINET VE-20121492 VE-20119985 BACK COVER VE-20121494 VE-20111863 BACK DOOR VE-20108124 VE-20120043 FUNCTION BUTTON VE-20091798 VE-20096498 POWER BUTTON VE-20111864 VE-20120046 JVC LOGO VE-40013592 VE-40013593 CARTON BOX VE-50038917 VE-50038907

2.4 DIFFERENCE LIST BY ELECTRONICS

Part Name

AV-28KT1BUF/A AV-28KT1SUF/A

AV-28KT1BUF/B AV-28KT1SUF/B

AV-28KT1BUF/C AV-28KT1SUF/C

MAIN PWB VE-20120604 VE-20127801 VE-20127796 IC500 (MI-COM) VE-20139901 VE-20137151 VE-20139902 IC502 (MEMORY) VE-20120610 VE-20134092 VE-20126318

2.5 DIFFERENCE LIST BY OSD LANGUAGE

Part Name

AV-28KT1BUF/A AV-28KT1SUF/A

OSD LANGUAGES ENG, GER, FRE, ITA

SPA, DUT, POR, TUR

AV-28KT1BUF/B AV-28KT1SUF/B

ENG, GER, FRE, SWE

NOR, DAN, FIN, GRE

AV-28KT1BUF/C AV-28KT1SUF/C

ENG, GER, CZE, POL

HUN, BUL, ROM, CRO

(No.52137)1-5

Page 6

3.1 DISASSEMBLY PROCEDULE

3.1.1 REMOVING THE REAR COVER

(1) Unplug the power cord. (2) Remove the 8 screws [A] as shown in the Fig. 1. (3) Remove the 4 screws [B]. (4) Withdraw the REAR COVER toward you.

3.1.2 REMOVING THE BACK DOOR

• Remove the REAR COVER (1) Remove the 2 screws [C]. (2) Withdraw the BACK DOOR toward you.

3.1.3 REMOVING THE SPEAKER

• Remove the REAR COVER. (1) Remove the 4 screws [I], and remove the SPEAKER. (2) Remove the other hand SPEAKER in the same steps.

SECTION 3

DISASSEMBLY

3.1.9 CHECKING THE PW BOARD

• To check the back side of the PW Board. (1) Pull out the PW Board . (Refer to REMOVING THE MAIN

PWB).

(2) Erect the PW Board vertically so that you can easily check

the back side of the PW Board.

3.1.10 CAUTION

• When erecting the PW Board, be careful so that there will be no contacting with other PW Board.

• Before turning on power, make sure that the wire connector is properly connected.

• When conducting a check with power supplied, be sure to confirm that the CRT EARTH WIRE (BRAIDED ASS'Y) is connected to the CRT SOCKET PW board.

3.1.4 REMOVING THE MAIN PWB

• Remove the REAR COVER.

• Remove the BACK DOOR. (1) Remove the 4 screws [D]. (2) Slightly raise the both sides of the MAIN PWB by hand and

withdraw the MAIN PWB backward.

CAUTION:

If necessary, take off the wire clamp, connectors etc. Be careful enough when developing a MAIN PWB.

3.1.5 REMOVING THE SIDE CONTROL PWB

• Remove the REAR COVER. (1) Remove the 4 screws [E]. (2) Remove the SIDE PWB.

3.1.6 REMOVING THE BASE

• Remove the REAR COVER. (1) Remove the 2 screws [F]. (2) Remove the BASE.

NOTE:

Work after fixing so that a CRT screen may be placed u pside down or it may not fall.

3.1.7 REMOVING THE POWER SWITCH PWB

• Remove the REAR COVER.

• Remove the BASE. (1) Remove the 2 screws [G], and remove the POWER

SWITCH PWB.

3.1.11 WIRE CLAMPING AND CABLE TYING

(1) Be sure to clamp the wire. (2) Never remove the cable tie used for tying the wires

together. Should it be inadvertently removed, be sure to tie the wires with a new cable tie.

3.1.8 REMOVING THE LED PWB

• Remove the REAR COVER.

• Remove the BASE.

• Remove the POWER SWITCH PWB. (1) Remove the 2 screws [H], and remove the LED PWB.

1-6 (No.52137)

Page 7

CRT SOCKET PWB

BACK DOOR

REAR COVER

MAIN PWB

BASE

LED PWB

SPEAKER

SIDE CONTROL PWB

POWER SWITCH PWB

Fig.1

(No.52137)1-7

Page 8

3.2 REPLACEMENT OF CHIP COMPONENT

3.2.1 CAUTIONS

(1) Avoid heating for more than 3 seconds. (2) Do not rub the electrodes and the resist parts of the pattern. (3) When removing a chip part, melt the solder adequately. (4) Do not reuse a chip part after removing it.

3.2.2 SOLDERING IRON

(1) Use a high insulation soldering iron with a thin pointed end of it. (2) A 30w soldering iron is recommended for ea sily removing parts.

3.2.3 REPLACEMENT STEPS

1. How to remove Chip parts

2. How to install Chip parts

[Resistors, capacitors, etc.]

(1) As shown in the figure, push the part with tweezers and

alternately melt the solder at each end.

(2) Shift with the tweezers and remove the chip part.

[Transistors, diodes, variable resistors, etc.]

(1) Apply extra solder to each lead.

SOLDER

[Resistors, capacitors, etc.]

(1) Apply solder to the pattern as indicated in the figure.

(2) Grasp the chip part with tweezers and place it on the

solder. Then heat and melt the solder at both ends of the chip part.

[Transistors, diodes, variable resistors, etc.]

(1) Apply solder to the pattern as indicated in the figure. (2) Grasp the chip part with tweezers and place it on the

solder.

(3) First solder lead A as indicated in the figure.

(2) As shown in the figure, push the part with tweezers and

alternately melt the solder at each lead. Shift and remove the chip part.

NOTE :

After removing the part, remove remaining solder from the pattern.

1-8 (No.52137)

(4) Then solder leads B and C.

Page 9

3.3 SETTING OF THE LAST MEMORY FOR SHIPMENT

3.3.1 USER SETTING VALUES Setting Item Setting Value Setting Item Setting Value

SOUND MENU FEATURE MENU

BALANCE CENTER SLEEP TIMER OFF

BASS CENTER CHILD LOCK OFF

TREBLE CENTER LANGUAGE ENGLISH

HYPER SOUND OFF EXT-2 OUTPUT TV

PICTURE MENU BLUE BACKGROUND ON

BRIGHTNESS These adjust are automatically

CONTRAST PROGRAMME Refer to instruction book

COLOUR BAND

SHARPNESS CHANNEL

restored when A.P.S. bit in Service menu is set. The procedure for setting APS bit is described bellow.

HUE (only NTSC) STANDARD

PICTURE MODE USER COLOUR SYSTEM

COLOUR TEMP NORMAL DECODER (EXT-2)

ZOOM AUTO FINE TUNING

INSTALL. MENU

STORE

3.3.2 SETTING A.P.S. (AUTO STORE)

(1) Press [MENU] key on the remote control unit to display the main menu. (2) Press [/] keys to select PROGRAM item, them [/] keys to display the PROGRAM menu. (3) Press the [BLUE] key to enter the AUTOSTORE mode. (4) Press [/] keys to choose the COUNTRY, then press [/] keys the choose country you are nou located. (5) Press [/] keys to choose the CONTINUE, then press [] key to start A.P.S. The following message appears.

NOTE:

To cancel the A.P.S., press the [STANDARD] key. (6) After A.P.S. is finalized, the PROGRAM menu appears again. (7) Press [STANDARD] key to exit main menu.

(No.52137)1-9

Page 10

SECTION 4

ADJUSTMENT

4.1 ADJUSTMENT PREPARATION

(1) 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 Remo te 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 a re 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 wi t h th e re mote control unit:

4.4 ADJUSTMENT LOCATIONS

Setting Item Setting value

BRIGHTNESS CENTER CONTRAST COLOUR SHARPNESS COLOUR TEMP ZOOM AUTO

4.2 MEASURING EQUIPMENT

(1) DC voltmeter (or digital voltmeter) (2) Signal generator (Pattern generator)

[PAL / SECAM / NTSC]

(3) Remote control unit

4.3 ADJUSTMENT ITEM

• SCREEN ADJUSTMENT

• DEFLECTION CIRCUIT ADJUSTMENT

• WHITE BALANCE ADJUSTMENT

TOP

HEADPHONE

P/Ch

VIDEO

SIDE CONTROL PWB

TUNER

TU200

IC500 (MI-COM)

IC502 (MEMORY)

FRONT

MAIN PWB

FBT

UPPER : FOCUS LOWER : SCREEN

1-10 (No.52137)

Page 11

4.5 BASIC OPERATION OF SERVICE MENU

4.5.1 HOW TO ENTER THE SERVICE MENU

(1) Press the [INFORMATION] key and [MUTING] key

simultaneously in the main menu, and the SERVICE MENU screen (Fig.1) will be displayed.

SERVICE MENU

REMOTE CONTROL UNIT key NAME

SERVICE

ADJUST... OPTIONS...

Select for adjustment Do not adjust

AK45JA*** AK45JA***

Fig.1

(2) While the SERVICE MENU screen is displayed, pr ess the

[/] and [/] key and select the "ADJUST...", then ADJUST MENU sucreen (Fig.2) will be displayed.

ADJUST MENU

ADJUST...

000

***

001

***

002

***

003

***

004

***

005

***

006

***

007

***

008

***

009

***

MUTING key

INFORMATION key

MENU key

UP / DOWN

[ ] key

LEFT / RIGHT

[ ] key

SETTING ITEM No. SETTING VALUE

Fig.2

4.5.2 SELECTION OF ADJUSTMENT ITEMS

(1) Enter the SERVICE MENU and select ADJUST. (2) Press the [/] key and select the ADJUSTMENT ITEM. (3) Press the [/] key and set the SETTING VALUE. (4) Changed values are stored automatically.

4.5.3 HOW TO EXIT SERVICE MODE

(1) Press the [MENU] key.

(No.52137)1-11

Page 12

4.5.4 SERVICE MENU SCREEN

SERVICE MENU

SERVICE

ADJUST... OPTIONS...

AK45JA*** AK45JA***

ADJUST MENU

ADJUST...

000

***

001

***

002

***

003

***

004

***

005

***

006

***

007

***

008

***

009

***

SETTING ITEM No.

000~143

SETTING VALUE

Do Not Adjust

OPTIONS MENU

OPTIONS..

000

********

001

********

002

********

003

********

004

********

005

********

006

********

007

********

008

********

009

********

SETTING ITEM No.

000~063

NOTE: Do not adjust the OPTIONS MENU. If you change the setting value, the set will not function correctly.

SETTING VALUE

1-12 (No.52137)

Page 13

ADJUSTMENT ITEM

adjustment No. adjustment part description

000 White Point RED Not used 001 White Point GREEN Not used 002 Whit Point BLUE Not used 003 AGC (Automatic Gain Control) 004 IF-PLL Negative Not used 005 IF-PLL Positive Not used 006 Y-Delay 007 Y-Delay SECAM 008 Y-Delay NTSC 009 Y-Delay OTHER Not used 010 Vertical Position Offset Fixed 011 Vertical Amplitude Offset Fixed 012 Horizontal Position Offset Fixed 013 Horizontal Amplitude Offset Fixed 014 Vertical Blank Start (It will be used only at 4:3 tube for 16:9 mode adjustment) 015 Vertical Blank Stop (It will be used only at 4:3 tube for 16:9 mode adjustment) 016 Angle 017 Bow 018 4:3 Horz. Blank Start Do not adjust 019 4:3 Horz. Blank Stop Do not adjust 020 EHTV compensation 021 EHTTM compensation 022 EHTEW compensation 023 WDR Video processor 024 WDG

adjust itself.

025 WDB 026 CR 027 CG 028 CB 029 COR coring level 030 REGULAR VERT_POS (Vertical Position) 031 REGULAR VERT_AMPL (Vertical Amplitude) 032 REGULAR VERT_SCOR (Vertical S Correction) 033 REGULAR VERT_SSYM (Vertical S Symmetry) 034 REGULAR TRAPEZE 035 REGULAR CUSHION 036 REGULAR HOR_COR_SYM(Horizontal Corner Symmetry) 037 REGULAR HOR_CORNER (Horizontal Corner) 038 REGULAR HORZ_POS (Horizontal Position) 039 REGULAR HORZ_AMPL (Horizontal Amplitude) 040 PANORAMIC VERT_POS Not used 041 PANORAMIC VERT_AMPL Not used 042 PANORAMIC VERT_SCOR Not used 043 PANORAMIC VERT_SSYM Not used 044 PANORAMIC TRAPEZE Not used 045 PANORAMIC CUSHION Not used 046 PANORAMIC HOR_COR_SYM Not used 047 PANORAMIC HOR_CORNER Not used 048 PANORAMIC HORZ_POS Not used

(No.52137)1-13

Page 14

adjustment No. adjustment part description

049 PANORAMIC HORZ_AMPL Not used 050 14:9 ZOOM VERT_POS Not used 051 14:9 ZOOM VERT_AMPL Not used 052 14:9 ZOOM VERT_SCOR Not used 053 14:9 ZOOM VERT_SSYM Not used 054 14:9 ZOOM TRAPEZE Not used 055 14:9 ZOOM CUSHION Not used 056 14:9 ZOOM HOR_COR_SYM Not used 057 14:9 ZOOM HOR_CORNER Not used 058 14:9 ZOOM HORZ_POS Not used 059 14:9 ZOOM HORZ_AMPL Not used 060 16:9 ZOOM VERT_POS Not used 061 16:9 ZOOM VERT_AMPL Not used 062 16:9 ZOOM VERT_SCOR Not used 063 16:9 ZOOM VERT_SSYM Not used 064 16:9 ZOOM TRAPEZE Not used 065 16:9 ZOOM CUSHION Not used 066 16:9 ZOOM HOR_COR_SYM Not used 067 16:9 ZOOM HOR_CORNER Not used 068 16:9 ZOOM HORZ_POS Not used 069 16:9 ZOOM HORZ_AMPL Not used 070 16:9 ZOOM SUBTITLE VERT_POS Not used 071 16:9 ZOOM SUBTITLE VERT_AMPL Not used 072 16:9 ZOOM SUBTITLE VERT_SCOR Not used 073 16:9 ZOOM SUBTITLE VERT_SSYM Not used 074 16:9 ZOOM SUBTITLE TRAPEZE Not used 075 16:9 ZOOM SUBTITLE CUSHION Not used 076 16:9 ZOOM SUBTITLE HOR_COR_SYM Not used 077 16:9 ZOOM SUBTITLE HOR_CORNER Not used 078 16:9 ZOOM SUBTITLE HORZ_POS Not used 079 16:9 ZOOM SUBTITLE HORZ_AMPL Not used 080 OSD Position 081 BCLTHR Beam current threshold 082 BCLG Beam current loop gain 083 ROTATION (TILT) 084 LSLSA Luma soft limiter Fixed 085 LSLSB Luma soft limiter Fixed 086 LSL2 Luma soft limiter Fixed 087 LSLTA Luma soft limiter Fixed 088 LSLTB Luma soft limiter Fixed 089 REFERENCE WDR RED (NORMAL) 090 REFERENCE WDR GREEN (NORMAL) 091 REFERENCE WDR BLUE (NORMAL) 092 REFERENCE CUTOFF RED Fixed 093 REFERENCE CUTOFF GREEN Fixed 094 REFERENCE CUTOFF BLUE Fixed 095 IBRM 096 WDRV 097 ACC_SAT (COLOUR OFFSET) 098 G2_CUTOFF_REFERENCE Fixed

1-14 (No.52137)

Page 15

adjustment No. adjustment part description

099 G2_WDR_REFERENCE Fixed 100 POFS2 (RGB HORIZANTAL SHIFT) 101 REFERENCE WDR RED COOL 102 REFERENCE WDR GREEN COOL 103 REFERENCE WDR BLUE COOL 104 REFERENCE WDR RED WARM 105 REFERENCE WDR GREEN WARM 106 REFERENCE WDR BLUE WARM 107 STANDARD MODE BRIGHTNESS 108 STANDARD MODE COLOUR 109 STANDARD MODE CONTRAST 110 FULL VERT_POS (16:9 MODE) 111 FULL VERT_AMPL 112 FULL VERT_SCOR 113 FULL VERT_SSYM 114 FULL TRAPEZE 115 FULL CUSHION 116 FULL HOR_COR_SYM 117 FULL HOR_CORNER 118 FULL HORZ_POS 119 FULL HORZ_AMPL 120 BRIGHT MODE BRIGHTNESS 121 BRIGHT MODE COLOUR 122 BRIGHT MODE CONTRAST 123 SOFT MODE BRIGHTNESS 124 SOFT MODE COLOUR 125 SOFT MODE CONTRAST 126 PERSONAL MODE FACTORY SETTING BRIGHTNESS Fixed 127 PERSONAL MODE FACTORY SETTING COLOUR Fixed 128 PERSONAL MODE FACTORY SETTING CONTRAST Fixed 129 SCINC FOR PANORAMIC MODE 130 SCINC1 FOR PANORAMIC MODE 131 VOLUME AFTER APS 132 VERTICAL SCROLL 133 14:9 HORIZONTAL START Not used 134 14:9 HORIZONTAL STOP Not used 135 4:3 RGB HORIZONTAL AMPLITUDE 136 4:3 RGB CUSHION 137 14:9 RGB HORIZONTAL AMPLITUDE Not used 138 14:9 RGB CUSHION Not used 139 PANAROMIC RGB HORIZONTAL AMPLITUDE Not used 140 16:9 RGB HORIZONTAL AMPLITUDE Not used 141 16:9 SUBTITLE RGB HORIZONTAL AMPLITUDE Not used 142 FULL RGB HORIZONTAL AMPLITUDE 143 TELETEXT HORIZONTAL POSITION

(No.52137)1-15

Page 16

4.6 ADJUSTMENT PROCEDURE

4.6.1 FOCUS / SCREEN ADJUSTMENT

Item

FOCUS adjustment

Measuring

instrument

Signal generator

Remote control unit

Test point Adjustment part Description

FOCUS VR [On the FBT]

(1) Receive a PAL cross-hatch signal. (2) Adjust FOCUS VR on the FBT as thin as possible.

FOCUS VR

SCREEN VR

FBT

SCREEN adjustment

4.6.2 AGC ADJUSTMENT

Item

AGC adjustment

Remote control unit

Measuring

instrument

Signal generator

Remote control unit

Volt meter

SCREEN VR [On the FBT]

Test point Adjustment part Description

003 (1) Receive a PAL BG signal at 60dBµV RF signal level.

(1) Enter the OPTIONS MENU. (2) Select option No.002 and change bit 6 from 0 to 1

disabling vertical scan. Then horizontal line appears.

(3) Adjust horizontal line as thin as possible via screen

adjust pot.

(4) Press number 0 key to leave service menu.

(2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 003. (5) Adjust 003 by pressing till voltage at pin 1 of TUNER

is equal to 3.0V.

1-16 (No.52137)

Page 17

4.6.3 DEFLECTION CIRCUIT ADJUSTMENT

Item

VERTICAL POSITION

Measuring

instrument

Signal generator

Test point Adjustment part Description

adjustment

Remote control unit

030 110 (16:9 mode)

(1) Receive a PAL circle pattern signal. (2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 030. (5) Adjust 030 to make A=B. (6) Check and readjust 030 item if the adjustment

becomes improper after some other geometric

adjustments are done. (7) Select 110 (16:9 mode). (8) Adjust 110 in the same procedure.

VERTICAL SIZE adjustment

Screen

size

VERTICAL S-CORRECTION & LINEARITY adjustment

Signal generator

Remote control unit

Very close

Signal generator

Remote control unit

031 111 (16:9 mode)

Picture size 100%

032 033 112 (16:9 mode) 113 (16:9 mode)

UPPER

CENTER

LOWER

(1) Receive a PAL cross-hatch signal. (2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 031. (5) Adjust 031 until horizontal black lines on both the

upper and lower part of the cross-hatch pattern

become very closeted the upper and lower

horizontal sides of picture size and nearly about to

disappear. (6) Check and readjust 031 item if the adjustment

becomes improper after some other geometric

adjustments are done. (7) Select 111 (16:9 mode). (8) Adjust 111 in the same procedure.

(1) Receive a PAL cross-hatch signal. (2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 032. (5) Adjust 032 till the size of squares on both the upper

and lower part of cross-hatch pattern become equal

to the squares laying on the vertical center of the

cross-hatch pattern. (6) Check and readjust 032 item if the adjustment

becomes improper after some other geometric

adjustments are done. (7) Select 033. (8) Adjust 033 till all the size of squares of the cross-

hatch pattern become in equal size from the top of

the screen to its bottom of the whole screen. (9) Check and readjust 033 item if the adjustment

becomes improper after some other geometric

adjustments (especially after than S-COR

adjustment) are done.

(10) Select 112 (16:9 mode). (11) Adjust 112 in the same pr ocedure as 5. (12) Select 113 (16:9 mode). (13) Adjust 113 in the same pr ocedure as 8.

(No.52137)1-17

Page 18

Item

HORIZONTAL POSITION adjustment

Measuring

instrument

Signal

Test point Adjustment part Description

038

generator

118 (16:9 mode) Remote control unit

(1) Receive a PAL circle pattern signal. (2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 038. (5) Adjust 038 to make C=D. (6) Check and readjust 038 item if the adjustment

becomes improper after some other geometric

adjustments are done. (7) Select 118 (16:9 mode). (8) Adjust 118 in the same procedure.

HORIZONTAL SIZE adjustment

ANGLE adjustment

Very close

Signal generator

Remote control unit

Signal generator

Remote control unit

Screen size

Picture size 100%

039

(1) Receive a PAL cross-hatch signal. (2) Enter the SERVICE MENU.

119 (16:9 mode)

(3) Select ADJUST MENU. (4) Select 039. (5) Adjust 039 until vertical lines on both the left and

Very close

right part of the cross-hatch will be visible nor screen

will be so wide. (6) Check and readjust 039 item if the adjustment

becomes improper after some other geometric

adjustments are done. (7) Select 119 (16:9 mode). (8) Adjust 119 in the same procedure.

016 (1) Receive a PAL cross-hatch signal.

(2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 016. (5) Adjust 016 till the vertical lines of the cross-hatch

pattern become straight. (6) Check and readjust 016 item if the adjustment

becomes improper after some other geometric

adjustments are done.

1-18 (No.52137)

Page 19

Item

BOW adjustment

Measuring

instrument

Signal generator

Remote control unit

Test point Adjustment part Description

017 (1) Receive a PAL cross-hatch signal.

(2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 017. (5) Adjust 017 till the vertical line s become straight. (6) Check and readjust 017 item if the adjustment

becomes improper after some other geometric adjustments are done.

NOTE:

In case where there is a bow-shaped distortion of images on the screen. (Figure)

TRAPEZIUM adjustment

SIDE PIN adjustment

Signal generator

Remote control unit

Signal generator

Remote control unit

Parallel

034 114 (16:9 mode)

035 115 (16:9 mode)

(1) Receive a PAL cross-hatch signal. (2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 034. (5) Adjust 034 till verti cal lines, especially lines at the

sides of the picture frame become parallel to the both sides of picture tubes as close as possible.

(6) Check and readjust 034 item if the adjustment

becomes improper after some other geometric

adjustments are done. (7) Select 114 (16:9 mode). (8) Adjust 114 in the same procedure.

(1) Receive a PAL cross-hatch signal. (2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 035. (5) Adjust 035 till vertical lines close to the both sides of

the picture frame become parallel to vertical sides of

picture tube without any bending to left or to right

side of the screen. (6) Check and readjust 035 item if the adjustment

becomes improper after some other geometric

adjustments are done. (7) Select 115 (16:9 mode). (8) Adjust 115 in the same procedure.

(No.52137)1-19

Page 20

Item

CORNER adjustment

ROTATION adjustment

Measuring

instrument

Test point Adjustment part Description

Signal generator

Remote control unit

Straight Straight

Signal generator

Remote control unit

036

(1) Receive a PAL cross-hatch signal. (2) Enter the SERVICE MENU.

037

(3) Select ADJUST MENU. (4) Select 036.

116 (16:9 mode)

(5) Adjust 036 till vertica l lines at the upper corners of

the picture frame become vertical and parallel to

117 (16:9 mode)

vertical corner sides of picture tube.

(6) Check and readjust 036 item if the adjustment

becomes improper after some other geometric

adjustments are done. (7) Select 037. (8) Adjust 037 till vertical lines at the lower corners of the

picture frame become vertical and parallel to vertical

corner sides of picture tube. (9) Check and readjust 037 item if the adjustment

becomes improper after some other geometric

adjustments are done.

(10) Select 116 (16:9 mode). (11) Adjust 116 in the same procedure as 5. (12) Select 117 (16:9 mode). (13) Adjust 117 in the same procedure as 8.

083 (1) Receive a PAL cross-hatch signal.

(2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 083. (5) Adjust 083 to rotate the complete master clock-wise

and counter clock-wise depending on the CRT. (6) Check and readjust 083 item if the adjustment

becomes improper after some other geometric

adjustments are done.

NTSC HORIZONAL

Signal generator

SIZE adjustment

Remote control unit

Very close

Screen size

Picture size 100%

1-20 (No.52137)

135 142 (16:9 mode)

Very close

(1) Receive a NTSC cross-hatch signal. (2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 135. (5) Adjust 135 till vertical lines on b oth the l eft a nd right

part of the cross-hatch will be visible nor screen will

be so wide. (6) Check and readjust TRAPEZ item if the adjustment

becomes improper after some other geometric

adjustments are done. (7) Select 142 (16:9 mode). (8) Adjust 142 in the same procedure.

Page 21

Item

NTSC SIDE PIN adjustment

Measuring

instrument

Signal generator

Remote control unit

Test point Adjustment part Description

136 (1) Receive a NTSC cross-hatch signal.

(2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 136. (5) Adjust 136 till vertical lines close to the both sides of

the picture frame become parallel to vertical sides of

Parallel

picture tube without any bending to left or to right side of the screen.

(6) Check and readjust 136 item if the adjustment

becomes improper after some other geometric adjustments are done.

TELETEXT SCREEN adjustment

Signal generator

Remote control unit

143 (1) Receive a PAL cross-hatch signal.

(2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 143. (5) Adjust 143 to adjust the proper vertical size of

Teletext screen.

(6) Check and readjust 143 item if the adjustment

becomes improper after some other geometric adjustments are done.

(No.52137)1-21

Page 22

4.6.4 VIDEO CIRCUIT

Item

WHITE BALANCE

Measuring

instrument

Signal generator

adjustment

Remote control unit

COLOUR CUTOFF LEVEL

Signal generator

adjustment

Remote control unit

PAL Y DELAY

Signal generator

adjustment

Remote control unit

SECAM Y DELAY

Signal generator

adjustment

Remote control unit

NTSC Y DELAY

Signal generator

adjustment

Remote control unit

Test point Adjustment part Description

023

(1) Receive a PAL black & white signal. (2) Enter the SERVICE MENU.

024

(3) Select ADJUST MENU. (4) Select 023, 024 and 025 respectively.

025

(5) Adjust 023, 024 and 025 respectively, until the white

part turns to pure white without any other colour.

026

(1) Receive a PAL cross-hatch signal. (2) Enter the SERVICE MENU.

027

(3) Select ADJUST MENU. (4) Select 026, 027 and 028 respectively.

028

(5) Adjust 026, 027 and 028 respectively, until the black

part turns to pure black without any other colour.

006 (1) Receive a PAL colour bar signal.

(2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 006. (5) Adjust 006 till the colour transients on the colour bar

pattern becomes as sharper and possible as colours

between transients do not mix with each other.

007 (1) Receive a SECAM colour bar signal.

(2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 007. (5) Adjust 007 by pressing till the colour transients on

the colour bar pattern becomes as sharper and

possible as colouers between transients do not mix

with each other.

008 (1) Receive a NTSC colour bar signal from an external

source (e.g. FRONT AV : EXT-3). (2) Enter the SERVICE MENU. (3) Select ADJUST MENU. (4) Select 008. (5) Adjust 008 by pressing till the colour transients on

the colour bar pattern becomes as sharper and pos-

sible as colouers between transients do not mix with

each other.

1-22 (No.52137)

Page 23

SECTION 5

TROUBLESHOOTING

This service manual does not describe TROUBLESHOOTING.

(No.52137)1-23

Page 24

VICTOR COMPANY OF JAPAN, LIMITED

AV & MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan

(No.52137)

Printed in Japan

WPC