JVC AV-32T4SA Service Manual

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Page 1

SERVICE MANUAL

COLOUR TELEVISION

YA18120047

AV-32T4SA

BASIC CHASSIS

TV OK

.T/L

TABLE OF CONTENTS

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

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

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

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

No.YA181

2004/7

Page 2

SPECIFICATION

Items Contents

Dimensions ( W × H × D ) 94.8cm × 56.2cm × 55.0cm

Mass 53.0kg

TV RF System CCIR (B/G, I, L)

Colour System PAL / NTSC3.58 / NTSC4.43 (Only EXT mode)

Stereo System A2 (B/G)

NICAM (B/G, I, L)

Receiving Frequency

French CATV 116MHz - 172MHz

Intermediate Frequency

Colour Sub Carrier Frequency

Teletext System TOP (German system)

Power Input AC 220V~AC240V, 50Hz

Power Consumption 120W(Max) / 110W(Avg)

Picture Tube Visible size : 76cm [measured diagonally] (H : 67.4cm × V : 38.4cm)

High Voltage 31.0kV (+1kV / -1.5kV) (at zero beam current)

Speaker 6.5cm × 13cm, oval type × 2

Audio Power Output 10W + 10W

Aerial Input Terminal 75 Ω unbalanced, coaxial EXT-1 / EXT-2 / EXT-3 (Input / Output) 21-pin Euro connector (SCART socket) × 3 EXT-4 Video 1V(p-p) positive, negative sync provided, 75Ω, RCA pin jack × 1

Audio Out (variable) 0 - 1000V(rms), low impedance, RCA pin jack × 2 Headphone Jack Ø3.5mm Stereo mini jack × 1 Remote Control Unit RM-C1502 (AA/R6 dry cell battery × 2)

VHF 47MHz - 470MHz

UHF 470MHz - 862MHz

220MHz - 469MHz

VIF 38.9MHz (B/G, I, L)

33.9MHz (L')

SIF 33.4MHz (5.5MHz :B/G)

32.9MHz ( 6.0MHz:I )

32.4MHz (6.5MHz :L)

PAL 4.43MHz

NTSC 3.58MHz / 4.43MHz

FLOF (Fastext level 2.5 720P) WST (Standard system)

Standby : 2.7W

Audio 500mV(rms) (-4dBs), high impedance, RCA pin jack × 2

Design & specifications are subject to change without notice.

1-2 (No.YA181)

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 applied to the picture tube must conform

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 drawing 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 ground frame

and connecting the other end of the lead through a 10kΩ

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 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 Check

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 across 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 ME TAL PAR T

(No.YA181)1-3

Page 4

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

• New chassis design enable use of an interactive on screen control.

• The TELETEXT SYSTEM has a built-in FASTEXT (UK system) and WST (world standard system) system.

2.2 21-pin Euro connector (SCART) : EXT-1/EXT-2/EXT-3

Pin No. Signal designation Matching value EXT-1 EXT-2 EXT-3

1 AUDIO R output 500mV(rms) (Nominal), Low impedance Used (TV OUT) Used (LINE OUT) Not used

2 AUDIO R input 500mV(rms) (Nominal), High impedance Used (R1) Used (R2) Used (R3)

3 AUDIO L output 500mV(rms) (Nominal), Low impedance Used (TV OUT) Used (LINE OUT) Not used

4 AUDIO GND --- Used Used Used

5 GND (B) --- Used Used Used

6 AUDIO L input 500mV(rms) (Nominal), High impedance Used (L1) Used (L2) Used (L3)

7 B input 700mV

FUNCTION SW

(SLOW SW)

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

, 75Ω Used Used Not used

(B-W)

9 GND (G) --- Used Used Used

10 SCL / T-V LINK --- Not used

11 G input 700mV

, 75Ω Used Used Not used

(B-W)

12 SDA --- Not used Used (SDA2) Not used

13 GND (R) --- Used Used Used

14 GND (YS) --- Used Not used Not used

15 R / C input

R : 700mV C : 300mV

(B-W) (P-P)

, 75Ω

16 Ys input (FAST SW) Low : 0V-0.4V, High : 1V-3V, 75Ω Used Used Not used

17 GND (VIDEO output) --- Used Used Used

18 GND (VIDEO input) --- Used Used Used

19 VIDEO output 1V

20 VIDEO / Y input 1V

(Negative sync), 75Ω Used (TV OUT) Used (LINE OUT) Not used

(P-P)

(Negative sync), 75Ω Used Used Used

(P-P)

21 COMMON GND --- Used Used Used

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

• Because this TV unit corresponds to multiplex broadcast, users can enjoy music programs and sporting events with live realism. In addition, BILINGUAL programs can be heard in their original language.

• Users can make VCR dubbing of picture and sound by controlling the AV selector to select an optional source at the EXT-2 output.

Used Used Used

Used

(SCL2 / TV-LINK)

Not used

Used (R) Used (C2/R) Used (C3)

1-4 (No.YA181)

[Pin assignment]

20 18 16 14 12 10 8 6 4 2

21 19 17 15 13 11 9 7 5 3 1

Page 5

2.3 TECHNINAL INFORMATION

2.3.1 MAIN MI-COM (CPU) PIN FUNCTION

Pin No.

Pin name I/O Function

1 VssP2 -- GND 65 SVM O Scan velocity modulation 2 VssC4 -- GND 66 FbiSo I H pulse (Flyback pulse) 3 V1.8C4 I 1.8V 67 Hout O H drive 4 V3.3A3 I 3.3V 68 VssComb -- GND 5 VrefP_Sdac I 3.3V 69 V5Comb I 5V for comb filter 6 VrefN_Sdac -- GND 70 Vin/R2/Pr I EXT-1 Y 7 VrefP_Sdac I 3.3V 71 Uin/B2/Pb I EXT-1 B-Y 8 VrefN_Sdac -- GND 72 Yin/G2/Y I EXT-1 R-Y

9 VrefP_Sdac I 3.3V 73 Ysync I Y for sync sep 10 XtalIn I System clock(4MHz) 74 Yout O Y (for 73pin) 11 XtalOut O System clock(4MHz) 75 Uout/INSSW2 I Ys (for EXT-1 Y/R-Y/B-Y insertion) 12 VssA1 -- GND 76 Vout/Swo1 -- NC 13 Vguard I CRT neck broken protection [Detect: L] 77 INSSW3 I Ys (for EXT-2 Y/R-Y/B-Y insertion) 14 DecDig I 1.8V 78 R3/Pr I EXT-2 R-Y 15 V5P1 I 5V 79 G3/Y I EXT-2 Y 16 Phi2 -- Not used 80 B3/Pb I EXT-2 B-Y 17 Phi1 -- Not used 81 Gnd3 -- GND 18 Gnd1 -- GND 82 V5P3 I 5V 19 SecPll -- Not used 83 BCL I Automatic beam / contrast limit 20 Dec8G -- Not used 84 BLKIN I CRT cathode current (For Auto white balance) 21 Ewd/Avl O Parabola wave 85 Rout O Red (for CRT) 22 Vdb O V. drive(-) 86 Gout O Green (for CRT) 23 Vda O V. drive(+) 87 Bout O Blue (for CRT) 24 Vif1 I VIF 88 V3.3A1 I 3.3V 25 Vif2 I VIF 89 RefAdN -- Not used 26 Vsc -- Not used 90 V3.3RefAdP -- Not used 27 Iref -- Not used 91 RefAd -- Not used 28 GndIF -- GND 92 GndA -- GND 29 Sif1 I SIF 93 V1.8A I 1.8V 30 Sif2 I SIF 94 V3.3A2 I 3.3V 31 Agc O AGC voltage 95 VssAD -- GND 32 EHT I HV change correction 96 V1.8ADC I 1.8V 33 Ssif/RefIn/Avl/RefOut O L'/Other SW [L'system: H] 97 IntO I Remote control 34 AudoIn5L I Audio (Left) 98 P10/Int1 I TV_LINK control 35 AudioIn5R I Audio (Right) 99 P11/TO O TV_LINK control 36 AudOutSL O Audio (Left) 100 V1.8C2 I 1.8V 37 AudOutSR O Audio (Right) 101 VssC2 -- GND 38 DecsDem -- Not used 102 P04/I2SWs O I 39 QssO/AmO/AudeEm -- Not used 103 P03/I2SClk I I 40 Gnd2 -- GND 104 P02/I2SDo2 I/O I 41 PllIf -- Not used 105 P01/I2SDo1 O Reset for DAC 42 SifAgc -- Not used 106 P00/I2SDI1 I Headphone connection detection [Connect: L] 43 IfVo/FmRo/DvbO O Composite video detect 107 P13/T1 O Main power control [ON : H] 44 FmRo/DvbO -- Not used 108 SCL1 O I 45 V8AudioSwitches I 8V 109 SDA1 I/O I 46 AgcSsif -- Not used 110 V3.3P -- GND 47 V5P2 I 5V 111 P20/TPwm O Rotation control 48 SVO/IfVo/Cvbsl -- Not used 112 P21/Pwm0 O S-correction control [PANORAMIC: L] 49 Audio4InL -- Not used 113 P22/Pwm1 O Audio muting [Muting: L] 50 Audio4InR -- Not used 114 P23/Pwm2 O Audio muting [Muting: H] 51 Y4/Cvbs4 I Composite video /Y 115 P30/Adc0 I Protection detection for Low B short [Detect: H] 52 C4 I Chroma 116 P31/Adc1 O Lighting for POWER LED [ON :RED] 53 Audio2InL -- Not used 117 V1.8C1 I 1.8V 54 Audio2InR -- Not used 118 DecV1V8 I 1.8V 55 Cvbs2/Y -- Not used 119 P32/Adc2 I Key scan front control 56 Audio3InL -- Not used 120 P33/Adc3 I AGC 57 Audio3InR -- Not used 121 VssC1+P1 -- GND 58 Y3/Cvbs -- Not used 122 P24/PW3 -- Not used 59 C3 -- Not used 123 P25/PWM4 O Reset for main CPU 60 AudOutLsL -- Not used 124 V1.8C3 I 1.8V 61 AudOutLsR -- Not used 125 VssC3 -- GND 62 AudOutHpL -- Not used 126 P12/Int2 I Main power detection [ON: H] 63 AudOutHpR -- Not used 127 P14/RX I/O I 64 CVBSO/PIP -- Not used 128 P15/TX O I

Pin No.

Pin name I/O Function

S bus (WS) for DSP

S bus (clock) for DAC

S bus (Data) for audio

C bus (clock) for AV SW, TUNER, VOLUME

C bus (data) for AV SW, TUNER, VOLUME

C bus (data) for generally

C bus (clock) for generally

(No.YA181)1-5

Page 6

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

3.1.1 REMOVING THE REAR COVER

(1) Unplug the power plug. (2) Remove the sub woofer cord from the AV TERMINAL

BOARD.

(3) Remove the SUB WOOFER UNIT on the top of the rear

cover upward. (4) Remove the 13 screws [A] as shown in Fig.3. (5) Withdraw the REAR COVER toward you.

3.1.2 REMOVING THE SIDE CONTROL JACK ASSY

• Remove the REAR COVER. (1) Remove the screw [B] as shown in Fig.3. (2) Slightly pull the SIDE CONTROL JACK ASSY toward you,

and detach the claw from FRONT CABINET. Then it can be removed.

(3) Then disconnect the connector [S], [F] and [K] as shown

in Fig 1.

3.1.3 REMOVING THE SIDE CONTROL PWB

• Remove the REAR COVER.

• Remove the SIDE CONTROL JACK ASSY. (1) Remove the 3 claws [C] from backside of the SIDE

CONTROL JACK ASSY as shown in Fig.1.

(2) Remove the SIDE CONTROL PWB from the SIDE

CONTROL JACK ASSY.

3.1.4 REMOVING THE AV TERMINAL BOARD

• Remove the REAR COVER. (1) Remove the 5 screws [G] as shown in Fig. 3. (2) Remove the 2 claws [H] at the bottom of the AV

TERMINAL BOARD as shown in Fig. 2.

(3) Shift the AV TERMINAL BOARD slightly in the direction of

arrow [I], and remove it as shown in Fig. 2.

3.1.5 REMOVING THE MAIN CHASSIS

• Remove the REAR COVER. (1) Slightly raise the MAIN CHASSIS, and release the two claws

at the bottom of and both sides of the MAIN CHASSIS.

(2) Then withdraw the MAIN CHASSIS backward from the

front cabinet. (If necessary, detach the wire clamp, connectors etc.)

3.1.6 REMOVING THE MAIN SPEAKER

• Remove the REAR COVER. (1) Remove the 2 screws [E], and detach the MAIN SPEAKER

HOLDER as shown in Fig. 3. (When removing the screws [E] of the MAIN SPEAKER HOLDER, the lower side screw first, and then upper one.)

(2) Remove the 4 screws [F], which attached the MAIN

SPEAKER.

(3) Follow the same steps when disassemble the other hand

MAIN SPEAKER.

3.1.7 REMOVING THE CENTER SPEAKER

• Remove the REAR COVER.

• Remove the MAIN CHASSIS. (1) Remove the 2 screws [D] as shown in Fig. 3. (2) Remove the CENTER SPEAKER. If necessary, detach the

cables.

3.1.8 CHECKING THE PW BOARD

(1) Pull out the MAIN CHASSIS (Refer to REMOVING THE

MAIN CHASSIS).

(2) Erect the CHASSIS vertically with the HVT side facing up

so that you can easily check the back side of the PW board.

3.1.9 CAUTION

(1) When erecting the MAIN CHASSIS, be careful so that

there will be no contacting with other PWB.

(2) Before turning power on, make sure that the wire connector

is properly connected.

(3) 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 PWB.

3.1.10 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.

Connector

CONTROL

(Back view)

FRONT

SIDE

PWB

Fig.1

TERMINAL

BOARD

AV JACK PWB

Fig.2

1-6 (No.YA181)

Page 7

FRONT CABINET

SIDE

CONTROL

PWB

SIDE CONTROL JACK ASSEMBLY

MAIN SPEAKER HOLDER

CRT SOCKET PWB

FRONT CONTOL PWB

CLAW

AV JACK PWB

CONTROL BASE

CLAW

MAIN PWB

AUDIO CONTROL PWB

POWER & DEF.PWB

AV TERMINAL BOAD

MAIN SPEAKER

REAR COVER

POWER CORD

Fig.3

(No.YA181)1-7

Page 8

3.1.11 REMOVING THE CRT

NOTE:

• Replacement of the CRT should be performed by 2 or more

persons.

• After removing the REAR COVER, CHASSIS etc., (1) Putting the CRT change table on soft cloth, the CRT

change table should also be covered with such soft cloth (shown in Fig. 4).

(2) While keeping the surface of CRT down, mount the TV set

on the CRT change table balanced will as shown in Fig. 4.

(3) Remove 4 screws marked by arrows with a box type

screwdriver as shown in Fig. 5.

NOTE:

Since the cabinet will drop when screws have been removed, be sure to support the cabinet with hands.

(4) After 4 screws have been removed, put the cabinet slowly

on cloth (At this time, be carefully so as not to damage the front surface of the cabinet) shown in Fig. 6.

NOTE:

• The CRT should be assembled according to the opposite sequence of its dismounting steps.

• The CRT change table should preferably be smaller that the CRT surface, and its height be about 35cm.

CRT CHANGE TABLE

CLOTH

CRT CHANGE TABLE

Fig.4

CRT

Fig.5

APPROX. 35cm

BOX TYPE SCREW DRIVER

CRT

CABINET

CRT CHANGE TABLE

Fig.6

COATING OF SILICON GREASE FOR ELECTRICAL INSULATION ON THE CRT ANODE CAP SECTION.

Subsequent to replacement of the CRT and HV transformer or repair of the anode cap, etc. by dismounting them, be sure to coat silicon grease for electrical insulation as shown in Fig.7. Wipe around the anode button with clean and dry cloth. (Fig.7) Coat silicon grease on the section around the anode button. At this time, take care so that any silicon greases dose not sticks to the anode button. (Fig.8)

Silicon grease product No. KS - 650N

CRT

Anode button

Approx. 20mm (Do not coat grease on this section

Silicon grease should be coated by 5mm or more from the outside diameter of anode cap.

1-8 (No.YA181)

Silicon grease

coating

Fig.7

Anode button (No sticking of silicon grease)

Fig.8

Coating position of silicon grease

Anode cap

Page 9

3.2 MEMORY IC REPLACEMENT

• This model uses the memory IC.

• This memory IC stores data for proper operation of the video and drive circuits.

• When replacing, be sure to use an IC containing this (initial value) data.

3.2.1 MEMORY IC REPLACEMENT PROCEDURE

1. Power off

Switch off the power and disconnect the power plug from the AC outlet.

2. Replace the memory IC

Be sure to use the memory IC written with the initial setting values.

3. Power on

Connect the power plug to the AC outlet and switch on the power.

4. System constant check and setting

* It must not adjust without signal.

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

the REMOTE CONTROL UNIT simultaneously. (2) The SERVICE MENU screen of Fig. 1 will be displayed. (3) While the SERVICE MENU is displayed, press the

Address

Setting data

[INFORMATION] key and [MUTING] key simultaneously,

and the SYSTEM CONSTANT SET screen of Fig. 2 will

be displayed. (4) Refer to the "SYSTEM CONSTANT SET" , and check

the setting items. Where these differ, select the addres

with the [FUNCTION (UP/ DOWN)] key and adjust it with

the [FUNCTION (RIGHT/ LEFT)] keys. (The letter of the

selected item is displayed in yellow.) (5) A setup will become effective if the main power is shut off.

5. Receiving channel setting

Refer to the OPERATING INSTRUCTIONS and set the receive channels (Channels Preset) as described.

6. User settings

Check the user setting items according to the given in page later. Where these do not agree, refer to the OPERATING INSTRUCTIONS and set the items as described.

7. SERVICE MENU setting

Verify what to set in the SERVICE MENU, and set whatever is necessary (Fig.1). Refer to the SERVICE ADJUSTMENT for setting.

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DEF

5. VSM PRESET 6. VPS

7. SHIPPING (OFF)

MODEL=JW EURO (XXXXX)

Fig.1

EEP EDIT (LAST MEMORY) TOP ADDRESS=000H

00 01 02 03 04 05 06 07 8F 00 FE FF FF FF FF FF

08 09 0A 0B 0C 0D 0E 0F FF 01 BB FC 1F F9 FF FF

Fig.2

NAME OF REMOTE CONTROL KEY

Names of key

INFORMATION

MUTING

FUNCTION UP/DOWN

FUNCTION -/+

key

Do not adjust

3.2.2 SYSTEM CONSTANT SETTING

Address Setting data

00 8F

01 02

(No.YA181)1-9

Page 10

3.2.3 SETTINGS OF FACTORY SHIPMENT

3.2.3.1 BUTTON OPERATION 3.2.3.2 REMOTE CONTROL DIRECT OPERATION

Setting item Setting position

POWER Off

CHANNEL PR1

VOLUME 10

3.2.3.3 REMOTE CONTROL MENU OPERATION

(1) PICTURE

CHANNEL PR1

VOLUME 10

ZOOM PANORAMIC

3D SOUND OFF

(3) FEATURES

Setting item Setting position

PICTURE MODE STANDARD

CONTRAST / BRIGHT SHARP / COLOUR / HUE

COLOUR TEMP. NORMAL

FEATURES

AUTO VNR AUTO

COLOUR SYSTEM TV According to preset CH

4:3 AUTO ASPECT PANORAMIC

(2) SOUND

Setting item Setting position

STEREO / I•II Stereo sound

BASS Centre

TREBLE Centre

BALANCE Centre

HYPER SOUND OFF

Refer to [5. VSM PRESET]

EXT AUTO

Setting item Setting position

SLEEP TIMER OFF

BLUE BACK ON

CHILD LOCK Refer to OPERATION

INSTRUCTIONS

(4) SET UP

Setting item Setting position

AUTO PROGRAM TV channel automatically set

EDIT/MANUAL PRESET CH only

The others : BLANK

LANGUAGE ENGLISH

DECODER (EXT-2) OFF

EXT SETTING ID BLANK

S-IN BLANK

DUBBING EXT-1 → EXT-2

PICTURE TILT MIDDLE

1-10 (No.YA181)

Page 11

3.2.4 SERVICE MENU SETING ITEMS

Setting item Setting value Setting item Setting value

1. IF 1. VCO

2. DELAY POINT

2. V / C 1.SCREEN

2.CUTOFF R / G

3.WDR R / G / B

4.BRIGHT

5.CONT.

6.COLOUR

7.HUE

8.BLACK OFFSET B-Y

9.SHARP

10.Y-DELAY

11.TINT DVD

12.RGB BLK

3. AUDIO

(Do not adjust)

4. DEF. 1.V-SHIFT

1.DCX0 ADJ.

2. NICAM LOWER ERRLIM

3. NICAM UPPER ERRLIM

4. A2 ID THR

2.V-SLOPE

3.V-SIZE

4.H-CENT

5.H-SIZE

6.TRAPEZ

7.EW-PIN

8.COR-UP

9.COR-LOW

10.ANGLE

11.BOW

12.V-S.CR

13.V-LIN

5. VSM PRESET BRIGHT/SOFT/STD COOL/WARM/NOMAL

1.BRIGHT

2.CONT.

3.COLOUR

4.SHARP

5.HUE

6.VPS

(Do not adjust)

7.SHIPPING

(Do not adjust)

VPS PDC WSS SN

ON/OFF

1. R DRIVE

2. G DRIVE

3. B DRIVE

(No.YA181)1-11

Page 12

3.3 REPLACEMENT OF CHIP COMPONENT

3.3.1 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.

3.3.2 SOLDERING IRON

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

3.3.3 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.

1-12 (No.YA181)

(4) Then solder leads B and C.

Page 13

SECTION 4

ADJUSTMENT

4.1 ADJUSTMENT PREPARATION

(1) There are 2 ways of adjusting this TV : One is with the

REMOTE CONTROL UNIT and the other is the conventional method using adjustment parts and components.

(2) The adjustment using the REMOTE CONTROL UNIT is

made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values.

(3) Make sure that connection is correctly made AC to AC

power source.

(4) Turn on the power of the TV and measuring instruments for

warning up for at least 30 minutes before starting adjustments.

(5) If the receive or input signal is not specified, use the most

appropriate signal for adjustment.

(6) Never touch the parts (such as variable resistors,

transformers and condensers) not shown in the adjustment items of this service adjustment.

4.2 PRESET SETTING BEFORE ADJUSTMENT

Unless otherwise specified in the adjustment items, preset the following functions with the REMOTE CONTROL UNIT.

Item Preset value

PICTURE MODE STANDARD

CONTRAST / BRIGHT / SHARP / COLOUR / HUE 00

COLOUR TEMP. NORMAL

AUTO VNR AUTO

BASS / TREBLE / BALANCE Centre

HYPER SOUND OFF

ZOOM FULL

SLEEP TIMER OFF

4.3 MEASURING INSTRUMENT AND FIXTURES

(1) DC voltmeter (or digital voltmeter) (2) Oscilloscope (3) Signal generator

(Pattern generator : PAL / NTSC)

(4) Remote control unit

4.4 ADJUSTMENT ITEMS

 CHECK ITEM

• B1 VOLTAGE check

• HIGH VOLTAGE check

• IF VCO check

 FOCUS

• FOCUS adjustment

 DEFLECTION CIRCUIT

• V. POSITION adjustment

• V. SIZE adjustment

• H. POSITION adjustment

• H. SIZE adjustment

• SIDE-PIN adjustment

• TRAPEZIUM adjustment

• CORNER adjustment

• ANGLE adjustment

• BOW adjustment

• V. S-SHAPE CORRECTION & V.LINEARITY adjustment

 VIDEO CIRCUIT

• WHITE BALANCE adjustment

• SUB BRIGHT adjustment

• SUB CONTRAST adjustment

• SUB COLOUR-1 adjustment

• SUB COLOUR-2 adjustment

• SUB HUE-1 adjustment

• SUB HUE-2 adjustment

 VSM PRESET SETTING

• VSM PRESET setting

(No.YA181)1-13

Page 14

4.5 ADJUSTMENT LOCATIONS

TOP

SIDE CONTROL PWB

FRONT CONTROL PWB

POWER

LED

D8801

F8901

POWER CORD

IC8851

LF8901

POWER&DEF PWB

FRONT

SPEAKER

AUDIO CONTROL PWB

CN002

MAIN PWB

CN008

CN001

AV JACK PWB

IC941

CN004

DEG. COIL

DEG

DEF. YOKE

TUNER

IC702

MEMORY

CN003

CN009

HVT

1 B1 2 N.C. 3 X-ray 4 X-ray 5 GND

1-14 (No.YA181)

TOP

CRT SOCKET PWB

TP-47R

TP-47G

CN3008

TP-47B

CN3009

(SOLDER SIDE)

TP-E

VM2

FOCUS1

FOCUS2

SCREEN

VM COIL

Page 15

4.6 BASIC OPERATION OF SERVICE MENU

4.6.1 TOOL OF SERVICE MENU OPERATION

Operate the SERVICE MENU with the REMOTE CONTROL UNIT.

4.6.2 SERVICE MENU ITEMS

With the SERVICE MENU, various adjustments can be made, and they are broadly classified in the following items of settings.

1.IF This mode adjusts the setting values of the IF circuit.

2.V/C This mode adjusts the setting values of the VIDEO circuit.

3.AUDIO This mode adjusts the setting values of the multiplicity AUDIO circuit. [Do not adjust]

4.DEF This mode adjusts the setting values of the DEFLECTION circuit for each aspect mode given below.

5.VSM PRESET This mode adjusts the initial setting values of COOL, NORMAL and WARM. (VSM : Video Status Memory)

6.VPS This mode shows the monitor of the VPS, PDC, WSS and SN. [Do not adjust]

7.SHIPPING(OFF) This mode is set at shipping. [Do not adjust]

4.6.3 BASIC OPERATION OF SERVICE MENU

(1) HOW TO ENTER SERVICE MENU

Press the [INFORMATION] key and the [MUTING] key of the REMOTE CONTROL UNIT simultaneously, and the SERVICE MENU screen of Fig.1 will be displayed.

(2) SELECTION OF SUB MENU SCREEN

Press one of [1] - [5] keys of the REMOTE CONTROL UNIT and select the SUB MENU SCREEN (See “SERVICE MENU FLOW CHART”), form the SERVICE MENU.

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DEF

5. VSM PRESET 6. VPS

7. SHIPPING (OFF)

NAME OF REMOTE CONTROL KEY

Names of key

INFORMATION

MUTING

Key

Fig.1

FUNCTION UP/DOWN

FUNCTION -/+

Fig.2

(3) METHOD OF SETTING

z 1.IF

[1.VCO] : It must not adjust without signal.

Key Function

(1) [1] Select 1.IF (2) [1] Select 1.VCO (CW)

Make sure that the arrow position between the ABOVE REF and BELOW REF.

(3) [INFORMATION] Return to the SERVICE MENU screen.

z 2.V/C, 4.DEF AND 5.VSM PRESET.

Key Function

(1) [2] / [3] / [4] / [5] Select one from 2.V/C, 4.DEF and 5.VSM PRESET. (2) [FUNCTION UP / DOWN (/)] Select setting items. (3) [FUNCTION -/+ (/)] Set (adjust) the setting values of the setting items. (4) [OK] Memorize the setting value.(Before storing the setting values in memory, do not press

the CH, TV, POWER key if you do, the values will not be stored in memory.)

(5) [INFORMATION] Return to the SERVICE MENU screen.

z 3.AUDIO, 6.VPS, and 7.SHIPPING.

[Do not setting]

(4) RELEASE OF SERVICE MENU

After completing the setting, return to the SERVICE MENU, then again press the [INFORMATION] key.

(No.YA181)1-15

Page 16

4.6.4 SERVICE MENU FLOW CHART

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DEF

5. VSM PRESET 6. VPS

7. SHIPPING (OFF)

1. V-SHIFT

2. V-SLOPE

3. V-SIZE

4. H-CENT

5. H-SIZE

6. TRAPEZ

7. EW-PIN

8. COR-UP

9. COR-LO

10. ANGLE

11. BOW

12.V-S.CR

13.V-LIN

PICTURE MODE

BRIGHT STD SOFT

1. BRIGHT

2. CONT

3. COLOUR

4. SHARP

5. HUE

COLOR TEMP

COOL NORM WARM

1. R DRIVE

2. G DRIVE

3. B DRIVE

4. DEF

DEF FULL 50Hz

1. V-SHIFT

5. VSM PRESET

VSM PRESET BRIGHT

1.BRIGHT

IF SERVICE MENU

1. VCO

2. DELAY POINT

2. V/C

1. SCREEN

PAL

HBC WBC

1.VCO1.IF

VCO (CW) ** , ** MHz

TOO HIGH ABOVE REFERENCE JUST REFERENCE BELOW REFERENCE TOO LOW

2.DELAY POINT

DELAY POINT

AGC TAKE OVER **

1. SCREEN

2. CUTOFF R/G

3. WDR R/G/B

4. BRIGHT

5. CONTRAST

6. COLOUR

7. HUE

8. BLACK OFFSET

9. SHARP

10. Y DELAY

11. TINT DVD

12. RGB BLK

Do not adjust

1-16 (No.YA181)

3. AUDIO

AUDIO

1. DCX0 ADJ. = NOT NICAM

0002 0009 000A

Do not adjust

1. DCX0 ADJ.

2. NICAM LOWER ERRLIM

3. NICAM UPPER ERRLIM

4. A2 ID THR

Page 17

4.7 INITIAL SETTING VALUE OF SERVICE MENU

(1) Adjustment of the SERVICE MENU is made on the basis of the initial setting values. However, the new setting values which

displays on the screen in its optimum condition may differ from the initial setting value. (2) Do not change the initial setting values of the items not listed in “ADJUSTMENT PROCEDURE”. (3) “---” is impossible to adjust or not requirement to adjustment.

4.7.1 [2. V/C]

Setting item Variable range

2. CUT OFF RED -63~+63 0 0 0 0

GREEN -63~+63 0 0 0 0

3. WDR RED -63~+63 0 0 0 0

GREEN -63~+63 0 0 0 0

BLUE -63~+63 0 0 0 0

4. BRIGHT -63~+63 0 0 0 0

5. CONTRAST -63~+63 -10 -10 -10 0

6. COLOUR -63~+63 0 0 0 0

7. HUE -63~+63 --- 0 0 ---

8. BLACK OFFSET B-Y 0~3 --- --- --- ---

Setting item

9. SHARP -63~+63 +5 +5 +5 +5 +5 +5 +5

Setting item

10. Y DELAY-63~+63+5+5+5+5+5+5+5+5+5+5

Variable

range

Variable

range

PAL NTSC NTSC4.43

RF VIDEO RF VIDEO RF VIDEO

PAL NTSC NTSC4.43

RF VIDEO S-VIDEO RF VIDEO S-VIDEO RF VIDEO S-VIDEO

PAL NTSC NTSC4.43 RGB

Setting value

RGB

Setting item

11. TINT DVD -63~+63 0 0 0 0

12. RGB BLK --- --- --- --- ---

4.7.2 [3. AUDIO] [Do not adjust]

Setting item

1. DCXO ADJ. --- F0

2. NICAM LOWER ERRLIM 00H~FFH 6F

3. NICAM UPPER ERRLIM 00H~FFH E0

4. A2 ID THR 00H~FFH 00

Variable

range

Variable

range

PAL NTSC NTSC4.43 RGB

Setting value

(No.YA181)1-17

Page 18

4.7.3 [4. DEF]

Setting item

1.V-SHIFT -32~+31 ±0 +3 +3 ±0 -12 ±0 ±0 ±0 ±0 ±0 ±0 ±0

2.V-SLOPE -32~+31 ±0±0±0±0 -4 ±0±0±0±0±0±0±0

3.V-SIZE -32~+31 ±0 -1 +5 ±0 +20 ±0 +14 ±0 ±0 ±0 -32 ±0

4.H-CENT -32~+31 +8 5 -2 ±0 ±0 ±0 ±0 ±0 ±0 ±0 +11 ±0

5.H-SIZE -32~+31 +18 ±0 +9 ±0 ±0 ±0 ±0 ±0 ±0 ±0 ±0 ±0

6.TRAPEZ -32~+31 -4 ±0 ±0 ±0 +2 ±0 ±0 ±0 ±0 ±0 ±0 ±0

7.EW-PIN -32~+31 -15 ±0 ±0 ±0 ±0 ±0 ±0 ±0 ±0 ±0 ±0 ±0

8.COR-UP -32~+31 ±0±0±0±0±0±0±0±0±0±0±0±0

9.COR-LO -32~+31 ±0±0±0±0+7±0±0±0±0±0±0±0

10.ANGLE -32~+31 ±0±0±0±0±0±0±0±0±0±0±0±0

11.BOW -32~+31 ±0±0±0±0±0±0±0±0±0±0±0±0

12.V.S-COR -32~+31-14±0+10±0+4±0±0±0±0±0±0±0

13.V.LIN -32~+31 +3±0+6±0+8±0±0±0±0±0±0±0

4.7.4 [5. VSM PRESET]

Item

1.BRIGHT -16~+16 +0 +0 +0 --- --- ---

2.CONT -16~+16 +12 +10 +2 --- --- ---

3.COLOUR -16~+16 +6 +0 -2 --- --- ---

4.SHARP -16~+16 +0 +0 -2 --- --- ---

5.HUE -16~+16 +0 +0 +0 --- --- ---

1.R DRIVE -64~+64 --- --- --- -8 +7 +0

2.G DRIVE -64~+64 --- --- --- +0 +0 +0

3.B DRIVE -64~+64 --- --- --- +9 -6 +0

Variable

range

Variable

range

FULL PANORAMIC SUBTITLE 14:9 ZOOM REGULAR COMPRESS

50Hz 60Hz 50Hz 60Hz 50Hz 60Hz 50Hz 60Hz 50Hz 60Hz 50Hz 60Hz

PICTURE MODE COLOUR TEMP.

BRIGHT STANDARD SOFT COOL NORMAL WARM

Setting value

1-18 (No.YA181)

Page 19

4.8 ADJUSTMENT PROCEDURE

4.8.1 CHECK ITEM

Item

B1 VOLTAGE check

Measuring

instrument

Signal generator

X connector TP-91(B1) TP-E

DC voltmeter

[POWER DEF

PWB] Remote control unit

HIGH VOLTAGE check

Signal generator

CRT anode

Chassis GND HV voltmeter

Remote control unit

IF VCO check

Remote control unit

IF SERVICE MENU

1. VCO

2. DELAY POINT

Test point Adjustment part Description

[2.V/C]

12.RGB BLK

(1) Receive the any broadcast. (2) Select 2. V/C from the SERVICE MENU. (3) Select < 12. RGB BLK >. (4) Press the [FUNCTION + ()] key to find the cut off

screen (Black screen). (5) Connect a DC voltmeter to TP-91(B1) and TP-E. (6) Make sure that the voltage is DC143V ± 2.0V. (7) Press the [FUNCTION - ()] key to return to service

menu.

[2.V/C]

12.RGB BLK

(1) Receive the any broadcast. (2) Select 2. V/C from the SERVICE MENU. (3) Select < 12. RGB BLK >. (4) Press the [FUNCTION + ()] key to find the cut off

screen (Black screen). (5) Connect a HV voltmeter to CRT ANODE and

chassis GND.

(A ground side is connected previously)

(6) Make sure that the voltage is DC 31.0kV

(+1kV / -1.5kV). (7) Press the [FUNCTION - ()] key to return to service

menu.

NOTE:

When removing a prove, an anode side is removed previously.

[1.IF]

1.VCO

• Under normal conditions, no adjustment is required.

• It must not adjust without broadcast signal. (1) Receive the any broadcast. (2) Select 1.IF from the SERVICE MENU. (3) Select < 1.VCO >.

(4) Check the ←(arrow) position between the ABOVE

REF. and BELOW REF.

Do not move

TOO HIGH ABOVE REF JUST REF BELOW REF TOO LOW

VCO( CW)

****

MHz

(No.YA181)1-19

Page 20

4.8.2 FOCUS

Item

Measuring

instrument

FOCUS Signal

generator

finest and sharpest as possible

Test point Adjustment part Description

FOCUS 1 VR FOCUS 2 VR [In HVT]

(1) Receive the crosshatch signal. (2) Set the ZOOM mode to FULL. (3) By turning the FOCUS 2 VR, adjust the picture so

that the A part vertical line may become thinnest (Fig.1) .

(4) By turning the FOCUS 1 VR, adjust the picture so

that the A part horizontal line may become uniform at the line centre and its periphery (Fig.1) .

(5) Make sure that when the screen is darkened, the

lines remain in good focus.

HVT

Horizontal line

FOCUS 1

FOCUS 2

SCREEN

Fig.1

Vertical line

1-20 (No.YA181)

Page 21

4.8.3 DEFLECTION CIRCUIT

There are 6 aspect modes ( 1.FULL, 2.PANORAMIC, 3.SUBTITLE, 4.14:9 ZOOM 5.REGULAR 6.COMPRESS) of the adjustment. Depending upon the kind of signals.

NOTE :

• At first the adjustment in 50Hz FULL mode should be done, then the data for the other aspect mode is corrected in the respective value at the same time. And confirm the deflection adjustment initial setting value in 60Hz (NTSC EXT mode) FULL mode. If the adjustment in 50Hz each aspect mode has been done and stored, the data for the same aspect modes in 60Hz is corrected in the respective value. Only the data for the other aspect mode in 60Hz is corrected for itself.

Item

Measuring

instrument

V. POSITION Signal

generator

Remote control unit

V. SIZE Signal

generator

Remote control unit

Screen

size

Test point Adjustment part Description

[4.DEF]

1.V- SHIFT

(1) Receive the circle pattern signal of vertical

frequency 50Hz (PAL / SECAM). (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MENU. (4) Select < 1.V-SHIFT >. (5) Set the initial setting value of < 1.V-SHIFT >. (6) Adjust vertical position to make A = B. (7) Check the adjustment value above in other zoom

mode. If it is a wrong adjustment, re-adjust in FULL

[4.DEF]

3.V-SIZE

mode and adjust by < 1.V-SHIFT >. (8) Press the [MENU] key and memorize the set value.

(1) Receive the crosshatch signal. (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MENU. (4) Select < 3.V-SIZE >. (5) Set the initial setting value of < 3.V-SIZE >. (6) Adjust to make sure that the vertical screen size of

the picture size is in the bellow table. (7) Make sure that the vertical screen size of the each

ASPECT mode is in the below table. (8) Press the [MENU] key and memorize the set value. (9) Input a NTSC VIDEO signal (60Hz) from the EXT

terminal, and make sure that the vertical screen size

is in the table below.

Picture size 100%

(10) Press the [MENU] key and memorize the set value.

[SCREEN SIZE]

ASPECT MODE FULL PANORAMIC SUBTITLE

SCREEN TOP

SCREEN BOTTOM

92%

87%

70%

83%

14:9 ZOOM REGULAR

80%

92%

(No.YA181)1-21

Page 22

Item

Measuring

instrument

H. POSITION Signal

generator

Remote control unit

Test point Adjustment part Description

[4.DEF]

4.H-CENT

(1) Receive the circle pattern signal. (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MENU. (4) Select < 4.H-CENT >. (5) Set the initial setting value of < 4.H-CENT >. (6) Adjust horizontal position to make C=D. (7) Press the [MENU] key and memorize the set value.

H. SIZE Signal

generator

Remote control unit

[SCREEN SIZE]

FULL PANORAMIC SUBTITLE

91% 95% (94%) 92%

SIDE-PIN Signal

generator

Remote control unit

Straight

[4.DEF]

5.H-SIZE

14:9 ZOOM REGULAR

495mm

450mm

[4.DEF]

7.EW-PIN

(1) Receive the circle pattern signal. (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MENU. (4) Select < 5.H-SIZE >. (5) Set the initial setting value of < 5.H-SIZE >. (6) Adjust to make sure that the horizontal screen size

of the picture size is in the bellow table.

(7) Make sure that the horizontal screen size of the each

ASPECT mode is in the below table.

(8) Press the [MENU] key and memorize the set value.

NOTE :

14 : 9 ZOOM and REGULAR are length of 90%. The value in ( ) shows NTSC adjustment value.

(1) Receive the crosshatch signal. (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MENU. (4) Select < 7.EW-PIN >. (5) Set the initial setting value of < 7.EW-PIN >. (6) Adjust to make the 2nd vertical lines at the left and

right edges of the screen straight. Also make sure that the 3rd vertical lines are straight.

(7) Press the [MENU] key and memorize the set value.

1-22 (No.YA181)

Page 23

Item

Measuring

instrument

TRAPEZIUM Signal

generator

Remote control unit

Test point Adjustment part Description

[4.DEF]

6.TRAPEZ

(1) Receive the crosshatch signal. (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MENU. (4) Select < 6.TRAPEZ >. (5) Set the initial setting value of < 6.TRAPEZ >. (6) Adjust to bring the vertical lines at the right and left

edges of the screen parallel. (7) Press the [MENU] key and memorize the set value.

Parallel

CORNER Signal

generator

Remote control unit

Straight Straight

ANGLE Signal

generator

Remote control unit

[4.DEF]

8.COR-UP

9.COR-LO

[4.DEF]

10. ANGLE

(1) Receive the crosshatch signal. (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MENU. (4) Select < 8.COR-UP >. (5) Set the initial setting value of < 8.COR-UP >. (6) Adjust to bring the straight line at the upper corner. (7) Select < 9.COR-LO >. (8) Set the initial setting value of < 9.COR-LO >. (9) Adjust to bring the straight line at the low corner.

(10) Press the [MENU] key and memorize the set value.

• In case where there is a parallelogrammical distortion of images on the screen. (1) Receive the crosshatch signal. (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MENU. (4) Select < 10.ANGLE >. (5) Set the initial setting value of < 10. ANGLE >. (6) Adjust to bring the vertical lines straight. (7) Press the [MENU] key and memorize the set value.

Bring the vertical lines straight.

(No.YA181)1-23

Page 24

Item

Measuring

instrument

BOW Signal

generator

Remote control unit

Test point Adjustment part Description

[4.DEF]

11.BOW

• In case where there is a bow-shaped distortion of images on the screen. (1) Receive the crosshatch signal. (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MENU. (4) Select < 11.BOW >. (5) Set the initial setting value of < 11. BOW >. (6) Adjust to bring the vertical lines straight. (7) Press the [MENU] key and memorize the set value.

Bring the vertical lines straight.

V. S-SHAPE CORRECTION & V. LINEARITY

Signal generator

Remote control unit

[4.DEF]

12.V-S.CR

13.V-LIN

TOP

CENTER

BOTTOM

• When the vertical linearity has been deteriorated remarkably, perform the following steps. (1) Receive the crosshatch signal. (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MENU. (4) Select < 13.V-LIN >. (5) Set the initial setting value of < 13.V-LIN >. (6) Select < 12.V-S.COR >. (7) Set the initial setting value of < 12.V-S.COR >. (8) Adjust < 13.V-LIN > and < 12.V-S.COR > so that the

spaces of each line on top, center and bottom become uniform.

(9) Press the [MENU] key and memorize the set value.

1-24 (No.YA181)

Page 25

4.8.4 VIDEO CIRCUIT

Item

WHITE BALANCE

Measuring

instrument

Signal generator

Remote control unit

REMOTE CONTROL UNIT KEY

CUTOFF G ٕ WDR G ٕ

CUTOFF R ً WDR R ً

CUTOFF R ٕ WDR R ٕ

Test point Adjustment part Description

[2. V/C]

2.CUTOFF R / G

3.WDR R / G / B

123

456

789

CUTOFF G ً WDR G ً

WDR B ً

WDR B ٕ

(1) Receive the black and white signal (colour off). (2) Set the ZOOM mode to FULL. (3) Set the PICTURE mode to STD. (4) Set the COLURTEMP. to NORMAL. (5) Select 2.V/C from the SERVICE MENU. (6) Select < 2.CUTOFF >. (7) Each select (R), (G) and adjust the screen until the

black portion in the screen becomes black. (8) Select < 3.WDR >. (9) Each select (R), (G), (B) and adjust the screen until

the white portion in the screen becomes white.

NOTE:

Do not adjust < 3. WDR G >. (10) Press the [MENU] key and memorize the set value. (11) Change the contrast and brightness from low-light to

high-light and check that the tracking of the white balance is good.

SUB BRIGHT Remote

control unit

SUB CONTRAST

SUB COLOUR-1 Remote

Remote control unit

control unit

[2. V/C]

4. BRIGHT

[2. V/C]

5. CONT.

[2.V/C]

6.COLOUR (PAL/NTSC)

(1) Receive the any broadcast. (2) Set the ZOOM mode to FULL. (3) Set the PICTURE mode to STD. (4) Select 2.V/C from the SERVICE MENU. (5) Select < 4.BRIGHT >. (6) Set the initial setting value of < 4.BRIGHT >. (7) If the brightness is not the best with the initial setting

value, make fine adjustment until you get the best brightness.

(8) Press the [MENU] key and memorize the set value.

(1) Receive the any broadcast. (2) Set the ZOOM mode to FULL. (3) Set the PICTURE mode to STD. (4) Select 2.V/C from the SERVICE MENU. (5) Select < 5.CONT >. (6) Set the initial setting value of < 5.CONT >. (7) If the contrast is not the best with the initial setting

value, make fine adjustment until you get the best contrast.

(8) Press the [MENU] key and memorize the set value.

[Method of adjustment without measuring instrument]

PAL COLOUR

(1) Receive PAL broadcast. (2) Set the ZOOM mode to FULL. (3) Set the PICTURE mode to STD. (4) Select 2.V/C from the SERVICE MENU. (5) Select < 6.COLOUR >. (6) Set the initial setting value of < 6.COLOUR >. (7) If the colour is not the best with the initial set value,

make fine adjustment until you get the best colour.

(8) Press the [MENU] key and memorize the set

value.

NTSC 3.58 COLOUR

(1) Input the NTSC 3.58MHz signal from the EXT

terminal.

(2) Make similar fine adjustment of NTSC 3.58

COLOUR in the same manner as for above.

NTSC 4.43 COLOUR

(1) When NTSC 3.58 COLOUR set, NTSC 4.43

COLOUR will automatically set.

(No.YA181)1-25

Page 26

Item

Measuring

instrument

SUB COLOUR-2 Signal

generator

Oscilloscope

Remote control unit

[PAL COLOUR VOLTAGE SETTING]

VOLTAGE (W-B)

[NTSC COLOUR VOLTAGE SETTING]

VOLTAGE (W-B)

Test point Adjustment part Description

TP-47B TP-E [CRT SOCKET PWB ]

[2.V/C]

6.COLOUR (PAL/NTSC)

(A)

Voltage setting

+2V

Voltage setting

+2V

(-)

(+)

[Method of adjustment using measuring instrument]

PAL COLOUR

(1) Receive the PAL full field colour bar signal (75%

white). (2) Set the ZOOM mode to FULL. (3) Set the PICTURE mode to STD. (4) Select 2.V/C from the SERVICE MENU. (5) Select < 6.COLOUR >. (6) Set the initial setting value of < 6.COLOUR >. (7) Connect the oscilloscope between TP-47B and

TP-E. (8) Adjust PAL COLOUR and bring the value of (A) in

the illustration to the values as shown given billow

(Voltage difference between white (W) and blue

(B)). (9) Press the [MENU] key and memorize the set

value.

NTSC 3.58 COLOUR

(1) Input the NTSC 3.58MHz signal (full field colour

bar with 75% white) from the EXT terminal. (2) Set the initial setting value of NTSC 3.58

COLOUR. (3) Adjust NTSC 3.58 COLOUR and bring the value

of (A) in the illustration to the values as shown

given billow (Voltage difference between white

(W) and blue (B)). (4) Press the [MENU] key and memorize the set

value.

NTSC 4.43 COLOUR

(1) When NTSC 3.58 COLOUR set, NTSC 4.43

COLOUR will automatically set.

SUB HUE-1 Remote

control unit

[2.V/C]

7.HUE

[Method of adjustment without measuring instrument]

NTSC 3.58

(1) Input the NTSC 3.58MHz COMPOSITE VIDEO

signal (full field colour bar with 75% white) from

the EXT terminal. (2) Set the ZOOM mode to FULL. (3) Set the PICTURE mode to STD. (4) Select 2.V/C from the SERVICE MENU. (5) Select < 7. HUE >. (6) Set the initial setting value of < 7. HUE >. (7) If you cannot get the best hue with the initial

setting value, make fine adjustment until you get

the best hue. (8) Press the [MENU] key and memorize the set

value.

NTSC 4.43

(1) When NTSC 3.58 is set, NTSC 4.43 will be

automatically set at the respective values.

1-26 (No.YA181)

Page 27

Item

Measuring

instrument

SUB HUE-2 Signal

generator

Oscilloscope

Remote control unit

[VOLTAGE SETTING]

Test point Adjustment part Description

TP-47B TP-E [CRT SOCKET PWB]

(B)

Voltage setting

[2.V/C]

7.HUE

(-)

(+)

[Method of adjustment using measuring instrument]

NTSC 3.58 HUE

(1) Input the NTSC 3.58MHz signal (full field colour

bar with 75% white) from the EXT terminal. (2) Set the ZOOM mode to FULL. (3) Set the PICTURE mode to STD. (4) Select 2.V/C from the SERVICE MENU. (5) Select < 7. HUE >. (6) Set the initial setting value of < 7. HUE >. (7) Connect the oscilloscope between TP-47B and

TP-E. (8) Adjust < 7. HUE > to bring the value of (B) in the

illustration to the values as shown given billow

(voltage difference between white (W) and

magenta (M)). (9) Press the [MENU] key and memorize the set

value.

NTSC 4.43 HUE

(1) When NTSC 3.58 COLOUR set, NTSC 4.43

COLOUR will automatically set.

VOLTAGE (W-M)

4.8.5 VSM PRESET SETTING

Item

Measuring

instrument

VSM PRESET Remote

control unit

-3V

Test point Adjustment part Description

[5.VSM PRESET] (BRIGHT/STD/SOFT)

1. BRIGHT

2. CONT.

3. COLOUR

4. SHARP

5. HUE (COOL/WARM/NORMAL)

1. R DRIVE

2. G DRIVE

3. B DRIVE

(1) Set the ZOOM mode to FULL. (2) Select 5.VSM PRESET from the SERVICE MENU. (3) Press the [MENU] key, and set the PICTURE MODE

to BRIGHT.

(4) Adjust the [FUNCTION UP/DOWN] and [-/+] key to

bring the set values of 1.BRIGHT to 5. HUE to the values shown in the [5. VSM PRESET].

(5) Press the [MENU] key, and set the PICTURE MODE

to STD. (6) Make similar adjustment as in 3 above. (7) Press the [MENU] key, and set the PICTURE MODE

to SOFT. (8) Make similar adjustment as in 3 above. (9) Press the [MENU] key, and set the COLOUR TEMP

to COOL.

(10) Adjust the [FUNCTION UP/DOWN] and [-/+] key to

bring the set values of 1. R DRIVE to 3. B DRIVE to

the values shown in the table.

(11) Press the [MENU] key, and set the COLOUR TEMP

to WARM.

(12) Make similar adjustment as in 9 above. (13) Press the [MENU] key, and set the COLOUR TEMP

to NORMAL.

(14) Make similar adjustment as in 9 above.

(No.YA181)1-27

Page 28

SECTION 5

TROUBLESHOOTING

This service manual does not describe TROUBLESHOOTING.

1-28 (No.YA181)

Page 29

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.YA181)

Printed in Japan

WPC