JVC AV-29JS25, AV-29WX25G, AV-29WX25 Service Manual

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Page 1

SERVICE MANUAL

FLAT COLOUR TELEVISION

YA28120058

AV-29JS25, AV-29WX25

EXIT

RM-C1286

BASIC CHASSIS

TABLE OF CONTENTS

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

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

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

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34

CW2

No.YA281

2005/8

Page 2

SPECIFICATION

Items

Dimensions (W × H × D) 73.1cm × 62.2cm × 49.45cm 81.2cm × 58.42cm × 51.8cm

Mass 42.5kg

TV RF System B, G, I, D, K, M

Colour System TV Mode

Video Mode

Stereo System A2 (B/G) / NICAM (B/G, I, D/K) Playback

Teletext system FLOF (Fastext)

Receiving Frequency VHF Low

VHF High

Intermediate Frequency

Colour Sub Carrier Frequency 4.43MHz (PAL), 4.40MHz/4.25MHz (SECAM), 3.58MHz/4.43MHz (NTSC)

Aerial Input Terminal 75Ω unbalanced, coaxial

Power Input AC110V ~ AC240V, 50Hz / 60Hz

Power Consumption 167W (Max.) / 109W (Avg.)

Picture Tube 29-inch, aspect ratio 4:3, flat square face type, tinted

Screen Size Visible size : 67.6cm (Diagonal) / 55.4cm × 41.4cm (H × V)

High Voltage 32.5kV (Max.) / 31.5kV (Typ.) / 30kV (Min.) (at zero beam current)

Speaker 6.5cm × 13cm, Oval type × 2

Audio Output 10W + 10W

Video / Audio Input (1/2/3)

Video / Audio Output Video 1V(p-p), 75Ω, RCA pin jack × 1

Headphone 3.5mm stereo mini jack × 1

Remote Control Unit RM-C1286-1H

S-Video [1] Mini-DIN 4 pin × 1

Video [1/2/3] 1V(p-p), negative sync, 75Ω, RCA pin jack × 3 Audio [1/2/3] 500mV(rms) (-4dBs ), high impedance, RCA pin jack × 6

Component

Video [2]

PAL / SECAM / NTSC3.58 / NTSC4.43 PAL / SECAM / NTSC3.58 / NTSC4.43

WST (World Standard Text)

46.25MHz ~ 140.25MHz (AS0 ~ S6)

147.25MHz ~ 423.25MHz (S7 ~ S36)

UHF

431.25MHz ~ 863.25MHz (S37 ~ C57)

CATV

Mid : X ~ Z, S1 ~ S10 Super: S11 ~ S20 Hyper: S21 ~ S41

VIF 38.0MHz

SIF D/K: 31.5MHz (6.5MHz)

[NICAM: 32.15MHz (5.85MHz)] I: 32.0MHz (6.0MHz) [NICAM: 31.45MHz (6.55MHz)] B/G: 32.5MHz (5.5MHz) [A2: 32.26MHz (5.74MHz)] [NICAM: 32.15MHz (5.85MHz)] M: 33.5MHz (4.5MHz)

Y: 1V(p-p), positive (negative sync provided), 75Ω C: 0.286V(p-p) (Burst signal), 75Ω

RCA pin jack × 3 Y:1V(p-p), positive (negative sync), 75Ω Cb/Cr:0.7V(p-p), 75Ω

Audio 500mV(rms)(-4dBs), Low impedance (400Hz when modulated 100%), RCA pin jack × 2

(AA/R06/UM-3 battery × 2)

AV-29JS25 AV-29WX25/G

Contents

D/K: 31.5MHz (6.5MHz) I: 32.0MHz (6.0MHz) B/G: 32.5MHz (5.5MHz) M: 33.5MHz (4.5MHz)

Design & specifications are subject to change without notice.

1-2 (No.YA281)

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.YA281)1-3

Page 4

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

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

• Pure flat CRT produces fine textured picture in every detail.

• Wide range voltage (110V ~ 240V) for AC power input.

• With AUDIO/VIDEO/S-VIDEO/COMPONENT input terminals.

C bus control utilizes single chip ICs.

•I

• By means of AUTO PROGRAM, the TV stations can be selected automatically and the TV channels can also be rearranged automatically.

• Built-in DIGITAL ECO MODE (ECONOMY, ECOLOGY). In accordance with the brightness in a room, the brightness and/or contrast of the picture can be adjusted automatically to make the optimum picture which is easy on the eye.

• Built-in OFF TIMER & RETURN +.

2.2 MAIN DIFFERENCE LIST

Items AV-29JS25 AV-29WX25/G

STEREO SYSTEM A2 / NICAM Playback

1-4 (No.YA281)

Page 5

2.3 MAIN CPU [MAIN PWB : IC701] PIN FUNCTION

Pin No.

1VssP2 -GND 2 VssC4 - GND 3 V1.8C4 I 1.8V (Digital) 4 V3.3A3 I 3.3V 5 VrefP_Sdac I 3.3V (Positive) 6 VrefN_Sdac - GND 7 VrefP_Sdac I 3.3V (Negative) 8 VrefN_Sdac - GND

9 VrefP_Sdac I 3.3V (Positive) 10 XtalIn I 24.576MHz for system clock 11 XtalOut O 24.576MHz for system clock 12 VssA1 - GND 13 NECK I V-guard input/ I/O switch 14 CONT I 1.8V regulator control 15 V5P1 I +5V 16 Ph2 - Phase-2 filter 17 Ph1 - Phase-1 filter 18 Gnd1 - GND 19 SecPll - SECAM PLL decoupling 20 Dec8G - Bandgap decoupling 21 EW O East-West drive output 22 VDRB- O Vertical drive B output 23 VDRA+ O Vertical drive A output 24 Vif1 I Video IF input 1 25 Vif2 I Video IF input 2 26 Vsc - Vertical sawtooth capacitor 27 Iref I Reference current input 28 GndIF - GND 29 Sif1 I Sound IF input 1 30 Sif2 I Sound IF input 2 31 AGC O Tuner AGC output 32 EHT I EHT/overvoltage protection input 33 Ssif/RefIn/Avl/RefOut O

34 L3 I Audio-L3 input (left signal) 35 R3 I Audio-R3 input (right signal) 36 L-OUT O Audio L output 37 R-OUT O Audio R output 38 DecsDem - Decoupling sound demodulator 39

40 Gnd2 - GND 41 PllIf - IF-PLL loop filter 42 SifAgc - AGC sound IF 43 IfVo/FmRo/DvbO O Not used 44 NC O Not used 45 V8AudioSwitches I 8V 46 AgcSsif - AGC capacitor second sound IF 47 V5P2 I 5V 48 V-OUT O Video output 49 L1 I Audio-L1 input 50 R1 I Audio-R1 input 51 V3 I Video V3 input 52 C4 I Not used 53 Audio2InL I Not used 54 Audio2InR I Not used 55 V2/Y I Video V2 input 56 L2 I Audio L2 input (Left signal) 57 R2 I Audio R2 input (right signal) 58 Y3/Cvbs I S-Video Y1 input 59 C1 I S-Video C1 input 60 AudioLsL O Audio L output for audio power amplifier 61 AudioLsR O Audio R output for audio power amplifier 62 HP-L O Not used

Pin name I/O Function

Automatic Volume Levelling/ sound IF input / subcarrier reference output / external reference signal input for I signalmixer for DVB operation

QssO/AmO/AudeEm

O QSS intercarrier output / AM output /

deemphasis / (front-end audio out)

Pin No.

63 HP-R O Not used 64 CVBSO/PIP O CVBS / PIP output 65 SVM O Not used 66 FbiSo I Flyback input/sandcastle output 67 Hout O Horizontal output 68 VssComb - GND 69 V5Comb I 5V 70 Vin/R2/Pr I PIP R input 71 Uin/B2/Pb I PIP B input 72 Yin/G2/Y I PIP G input 73 Ysync I Not used 74 Yout O Not used 75 Uout/INSSW2 I YUV insertion input 76 NC O Not used 77 INSSW3 I YUV insertion input 78 R3/Pr I Component PR input (Video-2) 79 G3/Y I Component Y input (Video-2) 80 B3/Pb I Component PB input (Video-2) 81 Gnd3 - GND 82 V5P3 I 5V 83 BCL I Beam current limiter input 84 BLKIN I Black current input 85 Rout O R output 86 Gout O G output 87 Bout O B output 88 V3.3A1 I 3.3V 89 RefAdN - GND 90 V3.3RefAdP I 3.3V (Positive) 91 RefAd I 3.3/2V 92 GndA - GND 93 V1.8A I 1.8V 94 V3.3A2 I 3.3V 95 VssADC - GND 96 V1.8ADC I 1.8V 97 REMOTE I Remote control 98 PW_LED I POWER LED control

99 PW_LED I POWER LED control 100 V1.8C2 I 1.8V 101 VssC2 - GND 102 TIMER - Not used 103 TIMER - Not used 104 VER_PROTECT O X-ray protect 105 S_REDUCE O Sound control 106 P00/I2SDI1 O Not used 107 POWER O SUB POWER control 108 SCL1 I I2C bus clock 109 SDA1 I/O I2C bus data 110 V3.3P I 3.3V 111 ROTATION O Rotation 112 3.58/OTHER O NTSC 3.58 detection 113 A_MUTE O Audio muting 114 4.5/OTHER O NTSC 4.43 detection 115 PROT I Protect 116 ECO_IN I ECO sensor level detection 117 V1.8C1 I 1.8V (Digital) 118 DecV1V8 I 1.8V 119 KEY_IN I Key scan data 120 VDO-DET I Video DET input 121 VSSC1+P1 - Digital GND 122 S_V_DET I S-Video DET input 123 P25/PWM4 O GTVA_reset 124 V1.8C3 I 1.8V (Digital) 125 VssC3 - GND 126 P12/Int2 I External interrupt 127 SDA0 I/O I2C bus data (for memory) 128 SCL0 I I2C bus clock (for memory)

Pin name I/O Function

(No.YA281)1-5

Page 6

3.1 DISASSEMBLY PROCEDURE [AV-29JS25]

SECTION 3

DISASSEMBLY

3.1.1 REMOVING THE REAR COVER

• Unplug the power cord. (1) Remove the 16 screws [A] as shown in Fig.1. (2) Withdraw the REAR COVER toward you.

CAUTION:

When reinstalling the rear cover, carefully push it inward after inserting the MAIN PWB into the REAR COVER groove.

3.1.2 REMOVING THE CHASSIS (CHASSIS BASE AND

CONTROL BASE)

• Remove the REAR COVER. (1) Slightly raise the both sides of the CHASSIS by hand and

remove the 2 claws [B] under the CHASSIS from the front cabinet as shown in Fig.1.

(2) Withdraw the CHASSIS backward.

(If necessary, take off the wire clamp, connectors etc.)

NOTE:

When conducting a check with power supplied, be sure to confirm that the CRT earth wire is connected to the CRT SOCKET PWB and the MAIN PWB.

3.1.3 REMOVING THE AV TERMINAL BOARD

• Remove the REAR COVER. (1) Remove the 4 screws [C] as shown in Fig.1. (2) When you pull out the AV TERMINAL BOARD in the

direction of arrow [D] as shown in Fig.1, it can be removed.

3.1.4 REMOVING THE CONTROL BASE

• Remove the REAR COVER.

• Remove the CHASSIS. (1) While pushing down the 2 claws [E] as shown in Fig. 2 and

pull out the CONTROL BASE in the direction of arrow [F] as shown in Fig. 2, the control base can be removed. (If necessary, take off the wire, connectors etc.)

3.1.5 REMOVING THE SPEAKER

• Remove the REAR COVER. (1) Remove the 2 screws [G], and remove the SPEAKER

HOLDER. (2) Remove the 4 screws [H] as shown in Fig.1. (3) Withdraw the SPEAKER backward. (4) Follow the same steps when removing the other hand

SPEAKER.

3.1.6 CHECKING THE MAIN PW BOARD

• To check the back side of the MAIN PWB. (1) Pull out the CHASSIS and CONTROL BASE. (Refer to the

procedure described in REMOVING THE CHASSIS)

(2) Put the CHASSIS in upright position with the MAIN PWB's

solderside faced to the right. The FBT must be positioned on top. (Viewed from the rear)

(3) Put the CONTROL PWBs in an appropriate position, taking

care not giving tension to the ribbon cables that connect to the MAIN PWB.

CAUTIONS:

• Use insulating materials, if necessary, to avoid possible

electrical contacts between PWBs and expose terminals, etc.

• Before turning on power, make sure that the CRT earth wire

and other connectors are properly connected.

• When repairing, connect the DEG. COIL to the DEG.

connector on the MAIN PWB.

3.1.7 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.

1-6 (No.YA281)

Page 7

CRT SOCKET PWB

SPEAKER HOLDER

SPEAKER

(⋅ 2)

[FRONT SIDE]

CONTROL BASE

CHASSIS BASE

Fig.2

SPEAKER

REAR COVER

(⋅ 2)

SPEAKER HOLDER

FRONT PWB

CLAW B (under side)

MAIN PWB

(⋅ 2)

Fig.2

CONTROL BASE

FBT

AV TERMINAL BOARD

CHASSIS BASE

CLAW B (under side)

(⋅ 16)

(⋅ 4)

Fig.1

(No.YA281)1-7

Page 8

3.2 DISASSEMBLY PROCEDURE [AV-29WX25/G]

3.2.1 REMOVING THE REAR COVER

• Unplug the power cord. (1) Remove the 16 screws [A] as shown in Fig.3. (2) Withdraw the REAR COVER toward you.

CAUTION:

When reinstalling the rear cover, carefully push it inward after inserting the MAIN PWB into the REAR COVER groove.

3.2.2 REMOVING THE CHASSIS (CHASSIS BASE AND

CONTROL BASE)

• Remove the REAR COVER. (1) Slightly raise the both sides of the CHASSIS by hand and

remove the 2 claws [B] under the CHASSIS from the front cabinet as shown in Fig.3.

(2) Withdraw the CHASSIS backward.

(If necessary, take off the wire clamp, connectors etc.)

NOTE:

When conducting a check with power supplied, be sure to confirm that the CRT earth wire is connected to the CRT SOCKET PWB and the MAIN PWB.

3.2.3 REMOVING THE AV TERMINAL BOARD

• Remove the REAR COVER. (1) Remove the 4 screws [C] as shown in Fig.3. (2) When you pull out the AV TERMINAL BOARD in the

direction of arrow [D] as shown in Fig.3, it can be removed.

3.2.4 REMOVING THE CONTROL BASE

• Remove the REAR COVER.

• Remove the CHASSIS. (1) While pushing down the 2 claws [E] as shown in Fig. 4 and

pull out the CONTROL BASE in the direction of arrow [F] as shown in Fig. 4, the control base can be removed. (If necessary, take off the wire, connectors etc.)

3.2.5 REMOVING THE SPEAKER

• Remove the REAR COVER. (1) Remove the 2 screws [G] as shown in Fig.3. (2) Withdraw the SPEAKER backward. (3) Follow the same steps when removing the other hand

SPEAKER.

3.2.6 CHECKING THE MAIN PW BOARD

• To check the back side of the MAIN PWB. (1) Pull out the CHASSIS and CONTROL BASE. (Refer to the

procedure described in REMOVING THE CHASSIS)

(2) Put the CHASSIS in upright position with the MAIN PWB's

solderside faced to the right. The FBT must be positioned on top. (Viewed from the rear)

(3) Put the CONTROL PWBs in an appropriate position, taking

care not giving tension to the ribbon cables that connect to the MAIN PWB.

CAUTIONS:

• Use insulating materials, if necessary, to avoid possible

electrical contacts between PWBs and expose terminals, etc.

• Before turning on power, make sure that the CRT earth wire

and other connectors are properly connected.

• When repairing, connect the DEG. COIL to the DEG.

connector on the MAIN PWB.

3.2.7 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.

1-8 (No.YA281)

Page 9

[FRONT SIDE]

CONTROL BASE

PICTURE TUBE

SPEAKER

FRONT CABINET

FRONT CONTROL PWB (1/2)

(X2)

CONTROL BASE

CHASSIS BASE

SPEAKER

CRT SOCKET PWB

Fig.2

CLAW B (under side)

(X2)

CHASSIS

BASE

FRONT CONTROL PWB (2/2)

CLAW B (under side)

MAIN PWB

Fig.4

FBT

AV TERMINAL BOARD

(X4)

REAR COVER

Fig.3

X16)

(

(No.YA281)1-9

Page 10

3.3 REPLACEMENT OF MEMORY IC

EXIT

3.3.1 MEMORY IC

This TV uses the following memory IC.

Memory IC: IC702 on MAIN PWB

The memory IC memorizes data for correctly operating the video and deflection circuits. When replacing the memory IC, be sure to use the same type IC written with the initial values of data. In other words, use the specific IC listed in "PRINTED WIRING BOARD PARTS LIST". For its mounting location, refer to "ADJUSTMENT LOCATIONS".

3.3.2 PROCEDURE FOR REPLACING MEMORY IC

1. Power off

Switch the power off and unplug the power cord from the wall outlet.

2. Replacing the memory IC

Replace the memory IC with new one. Be sure to use the memory IC written with the initial data values.

3. Power on

Plug the power cord into the wall outlet and switch the power on.

4. Check and setting of SYSTEM CONSTANT SET:

(1) Press the [DISPLAY] key and the [PICTURE MODE] key

on the remote control unit simultaneously. The SERVICE MENU screen will be displayed.(See Fig.1.)

(2) In the SERVICE MENU, press the [DISPLAY] key and

[PICTURE MODE] key simultaneously. Then, the SYSTEM CONSTANT SET screen will be displayed.(See Fig.2.)

(3) Check whether the setting values of the SYSTEM

CONSTANT SET are the same as those indicated in Table 1. If the value is different, select the setting item with the MENU [] / [] key, and set the correct value with the MENU [] / [] key.

(4) Press the [DISPLAY] key twice to return to the normal

screen.

5. Receive channel setting

Refer to the OPERATING INSTRUCTIONS and set the receive channels (channels preset).

6. User setting

Check the user setting values in Table 2 and Table 3. If setting value is different, set the correct value. For setting, refer to the OPERATING INSTRUCTIONS.

7. Setting of SERVICE MENU

Verify the setting for each setting item in the SERVICE MENU.(See Table 4.) If readjustment is necessary, perform adjustment referring to "ADJUSTMENTS PROCEDURE".

NAME OF REMOTE CONTROL KEYS

SERVICE MENU

1. IF

3. AUDIO

5. VSM W/B

7. PLUG & PLAY (ON)

1-7 : SELECT DISPLAY : EXIT

******* **** ***** ***** **** **** *** ***

2. V/C

4. DEF

6. S TATUS

Fig.1

SYSTEM CONSTANT-1

SYSTEM CONSTANT SET 1

SYSTEM COMB TILT SUPER BASS TEXT LANGUAGE

: SEL  : OPE

 

SYSTEM CONSTANT-2

SYSTEM CONSTANT SET 2

SOUND BILINGUAL BLUE BACK MUTE COLOUR AUTO ECO SENSOR

: SEL  : OPE

 

SYSTEM CONSTANT-3

SYSTEM CONSTANT SET 3

SURROUND

 

: SEL  : OPE

Fig.2

: MULTI

YES YES NO PAT ERCMI

DISP : EXIT

STEREO NO NO NO YES

DISP : EXIT

YES NOPICTURE BOOSTER YESCOMPONENT NOPIP YESS INPUT

DISP : EXIT

DISPLAY / BACK

PICTURE MODE

1-10 (No.YA281)

Page 11

3.3.3 FACTORY SETTING VALUE

 SETTING OF SYSTEM CONSTANT SET

Setting item Setting content

SYSTEM

COMB

TILT

SUPER BASS

TEXT

LANGUAGE

SOUND

BILINGUAL

BLUE BACK MUTE

COLOUR AUTO

ECO SENSOR

MULTI TRIPLE PAL THAI

YES NO

SINGLE NO PAT

E/R/C/M/I E/C

E/R/A/P/F

STEREO PB MONO

YES NO

Setting value

AV-29JS25 AV-29WX25/G

MULTI

YES

PAT

E/R/C/M/I

---

STEREO

---

E/R/A/P/F

YES

SURROUND

PICTURE BOOSTER

COMPONENT

PIP

S INPUT

YES NO

YES

Table 1

(No.YA281)1-11

Page 12

 SETTING OF BASIC FUNCTIONS

Setting item Setting value

POWER Off

SUB POWER On

VOLUME 15

INPUT TV

COLOR SYSTEM PAL

SOUND SYSTEM B/G

PICTURE MODE (VSM) BRIGHT

CINEMA SURROUND (RF)

OFF

OFF TIMER OFF

CHANNEL POSITION PR01

Table 2

 SETTING OF MENU SCREEN

Setting item Setting value

VNR AUTO

COMPRESS (16:9) OFF

CHILD LOCK OFF

BLUE BACK ON

VIDEO-2 SET COMPONENT

AUTO PROGRAM

EDIT / MANUAL

Refer to OPERATING INSTRUCTIONS

LANGUAGE ENG

TEXT LANGUAGE GROUP-1 [AV-29JS25]

GROUP-4 [AV-29WX25/G]

WHITE BALANCE (RF) COOL

BALANCE Centre

SOUND MODE (RF) MUSIC

AI VOLUME OFF

FAVORITE CH RED PR01

FAVORITE CH GREEN PR02

FAVORITE CH YELLOW PR03

FAVORITE CH BLUE PR04

AI ECO SENSOR OFF

AUTO SIGNAL DETECT ON

DVD PICTURE MODE OFF

TINT COLOR Centre

WHITE BALANCE (DVD) COOL

SOUND MODE (DVD) MUSIC

CINEMA SURROUND (DVD)

OFF

Table 3

 SERVICE MENU SETTING ITEMS

Setting item Setting value

1. IF 1. VCO

2. DELAY POINT

2. V/C 1. SCREEN

2. CUTOFF(B/G)

3. WDR(R/G/B)

4. BRIGHT(TV/VDO 1/2/3)

5. CONT(TV/VDO 1/2/3/TV 16:9/VDO 16:9)

6. COLOUR(TV/VDO1/2/3/DVD)

7. TINT(TV/VDO 1/2/3)

8. SHARP [Do not adjust]

9. Y DELAY [Do not adjust]

10. TINT DVD [Do not adjust]

11. AMP T. SHARP

12. TWIN CONT.

3. AUDIO [Do not adjust]

1. DCXO ADJ

2. NICAM lower ERRLIM

3. NICAM upper ERRLIM

4. A2 ID THR

5. MENU EQUALIZER

4. DEF 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

14. V-ZOOM

15. V-SCROLL

5. VSM W/B (BRIGHT/STANDARD/SOFT)

1. BRIGHT

2. CONT

3. COLOUR

4. SHARP

5. HUE

(COOL/WARM/NORMAL)

1. R DRIVE

2. G DRIVE

3. B DRIVE

6. STATUS [Display only]

7. PLUG & PLAY(ON) [Display only]

Table 4

1-12 (No.YA281)

Page 13

3.4 REPLACEMENT OF CHIP COMPONENT

3.4.1 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.

3.4.2 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.

3.4.3 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.

(4) Then solder leads B and C.

(No.YA281)1-13

Page 14

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

equipment 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 used for setting 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 the 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 variable resistors, transformers, trimmer capacitors,

etc.

4.2 PRESETTING BEFORE ADJUSTMENT

Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit.

 User mode setting position

Setting item Setting value

PICTURE MODE (VSM) BRIGHT

VNR OFF

AI ECO SENSOR OFF

BALANCE Centre

CINEMA SURROUND OFF

COMPRESS (16:9) OFF

4.3 MEASURING INSTRUMENT AND FIXTURES

(1) DC voltmeter (or Digital voltmeter) (2) Oscilloscope (3) Signal generator (Pattern generator) [PAL/SECAM/NTSC] (4) Remote control unit

4.4 ADJUSTMENT ITEMS

 B1 VOLTAGE  FOCUS ADJUSTMENT  IF CIRCUIT ADJUSTMENTS

• IF VCO adjustment

• DELAY POINT (AGC TAKE-OVER) adjustment  VIDEO CIRCUIT ADJUSTMENTS

• WHITE BALANCE (Low light) adjustment

• WHITE BALANCE (High light) adjustment

• SUB BRIGHT adjustment

• SUB CONTRAST adjustment

• SUB COLOUR 1 adjustment

• SUB COLOUR 2 adjustment

• SUB TINT 1 adjustment

• SUB TINT 2 adjustment

 AUDIO SETTING

 DEFLECTION CIRCUIT ADJUSTMENTS

• V.SLOPE adjustment

• V.POSITION adjustment

• V.HEIGHT adjustment

• H.POSITION adjustment

• H.WIDTH adjustment

• SIDE PIN adjustment

• TRAPEZIUM adjustment

• V. LINEARITY adjustment

• CORNER adjustment

• H. PARALLEL adjustment

• H.BOW adjustment

 VSM PRESET SETTING  PURITY AND CONVERGENCE ADJUSTMENTS

• PURITY adjustment

• STATIC CONVERGENCE adjustment

• DYNAMIC CONVERGENCE adjustment

1-14 (No.YA281)

Page 15

4.5 ADJUSTMENT LOCATIONS

FRONT CONTROL PWB ASS’Y (1/2) FRONT CONTROL PWB ASS’Y (2/2)

POWER CORD

S901

MAIN PWB ASS’Y

CN00W

CNDEG

DEG COIL

CN001

FRONT

ROTATION COIL

IC701

SPEAKER (L)

S804

IC702

S805

S806 S802

CN002

S803S801

J804 J803 J802

CN002

CN00S

J801

FRONT

SPEAKER (R)

FRONT

CRT EARTH

(BRAIDED ASS'Y)

1. 5V

2. SCL0

3. SDA0

4. SCL1

5. SDA1

6. GND

J804J801J805 J802 J803

GND 5V

TU001

CRT SOCKET PWB ASS’Y

TP-47R

TP-47G

CN00C

TP-47B

HVT

GND

UPPER : FOCUS

LOWER : SCREEN

(SOLDER SIDE)

TP-E

CN00X

1. B1

2. NC

3. X-RAY2

4. X-RAY1

5. GND

TOP

DEF YOKE

CRT EARTH

(BRAIDED ASS'Y)

(No.YA281)1-15

Page 16

4.6 BASIC OPERATION IN SERVICE MENU

Operate the SERVICE MENU with the remote control unit.

4.6.1 SERVICE MENU ITEMS

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

1. IF For entering/adjusting the setting values (adjustment values) of the IF circuit.

2. V/C For entering/adjusting the setting values (adjustment values) of the VIDEO circuit.

3. AUDIO For entering/adjusting the setting values (adjustment values) of the AUDIO circuit.

4. DEF For entering/adjusting the setting values (adjustment values) of the DEFLECTION circuit.

5. VSM W/B For setting the values of STANDARD, SOFT, BRIGHT and COOL, NORMAL, WARM.

6. STATUS This is not used for service.

7. PLUG & PLAY (ON) This is not used for service.

4.6.2 BASIC OPERATION IN SERVICE MENU

1. HOW TO ENTER SERVICE MENU

Press the [DISPLAY] key and the [PICTURE MODE] key on the remote control unit simultaneously. The SERVICE MENU screen will be displayed. (See Fig. 1 on the next page.)

2. SELECTION OF SUB MENU SCREEN

Press one of the keys 1 to 6 on the remote control unit, and select the SUB MENU SCREEN from the SERVICE MENU. (See Fig.1 on the next page.)

SERVICE MENU → SUB MENU

1. IF 5. VSM W/B

2. V/C 6. STATUS

3. AUDIO 7. PLUG & PLAY (ON)

4. DEF

3. METHOD OF SETTING

NOTES:

• Once the setting values are set, they are memorized automatically.

• It must not be adjusted without inputting a signal.

(1) 1. IF

[1.VCO ] : Under normal conditions, no adjustment is required.

(a) [1] key Select 1. IF. (b) [1] key Select 1. VCO. (c) [DISPLAY] key When this is pressed twice, you will return to the SERVICE MENU.

[2.DELAY POINT ]

(a) [1] key Select 1. IF. (b) [2] key Select 2. DELAY POINT. (c) MENU [] / [] key Adjust the setting value. (d) [DISPLAY] key When this is pressed twice, you will return to the SERVICE MENU.

(2) 2. V/C, 3. AUDIO and 4. DEF

(a) [2] ~[4] keys Select one from 2. V/C, 3. AUDIO and 4. DEF (b) MENU [] / [] key Select setting items. (c) MENU [] / [] key Adjust the setting values of the setting items.

Use the number keys on the remote control unit for setting the WHITE BALANCE. For the setting, refer to each item concerned.

(d) [DISPLAY] key When this is pressed, you will return to the SERVICE MENU.

(3) 5. VSM W/B

(a) [5] keys Select 5. VSM W/B. (b) MENU [OK] key Select preset items. (c) MENU [] / [] key Adjust setting items. (d) MENU [] / [] key Adjust the setting values of the setting items. (e) [DISPLAY] key When this is pressed, you will return to the SERVICE MENU.

(4) 6. STATUS

This is for display only.

(5) 7. PLUG & PLAY (ON)

This is not used for service.

4. Release of SERVICE MENU

After completing the setting, return to the SERVICE MENU by pressing the [DISPLAY] key, then again press the [DISPLAY] key to return to the normal screen.

1-16 (No.YA281)

Page 17

4.6.3 SERVICE MENU FLOW CHART

SERVICE MENU

1. IF

3. AUDIO

5. VSM W/B

7. PLUG & PLAY (ON)

1-7 : SELECT DISPLAY : EXIT

******* **** ***** ***** **** **** *** ***

2. V/C

4. DEF

6. STATUS

IF SERVICE MENU

1. VCO

2. DELAY POINT

V/C

1. SCREEN

1. IF

2. V/C

PAL

HBC

WBC

BRI

VCO (CW)

TOO HIGH ABOVE REFERENCE JUST REFERENCE BELOW REFERENCE TOO LOW

DELAY POINT

AGC TAKEOVER

Setting item

1. SCREEN (READ DATA)

2. CUTOFF (B/G)

** ** **

3. WDR (R/G/B)

4. BRIGHT (TV/VDO1/2/3)

5. CONT (TV/VDO1/2/3/TV 16:9/VDO16:9)

6. COLOUR (TV/VDO1/2/3/ DVD)

7. TINT (TV/VDO1/2/3)

8. SHARP (TV/VDO1/2/3) Y DELAY (TV/VDO1/2/3

/S-VDO)

10. TINT DVD (DVD)

11. AMP T.SHARP

12. TWIN CONT.

*****

MHz

6. STATUS

STATUS

V/C STATUS

ECO EOF NOL VNR

****

ADC ECO =

COSMIC STATUS

*******

** ** ** ** ** ** ** **

5. VSM W/B

VSM PRESET BRIGHT

1. BRIGHT

***

1. BRIGHT

2. CONT

3. COLOUR

4. SHARP

5.HUE

Setting item

1. R-DRIVE

2. G-DRIVE

3. B-DRIVE

3. AUDIO

AUDIO

1. DCXO ADJ. = NOT NICAM

0002

0009

000A

***

******* *******

*******

4. DEF

DEF FULL 50Hz

1. V-SHIFT

***

(**)

Setting item

1. DCXO ADJ

2. NICAM lower ERRLIM

3. NICAM upper ERRLIM

4. A2 ID THR

MENU EQUALIZER

EQUALIZER RF

USER SOUND TURBO THEATER MUSIC NEWS

1. V-SHIFT

2. V-SLOPE

3. V-SIZE

4. H-CENT

5. H-SIZE

6. TRAPEZ

7. EW-PIN

8. COR-UP

EQUALIZER VIDEO EQUALIZER DVD

USER SOUND TURBO THEATER MUSIC NEWS

4 : 3 / 16 : 9

Setting item

Setting value (Hexadecimal)

Setting value

Sereen size

FULL COMPRESS

USER SOUND TURBO THEATER MUSIC NEWS

9. COR-LO

10. ANGLE

11. BOW

12. V-S. CR

13. V-LIN

14. V-ZOOM

15. V-SCROLL

Fig.1

(No.YA281)1-17

Page 18

4.7 ADJUSTMENT PROCEDURE

4.7.1 B1 VOLTAGE

Item

B1 VOLTAGE check

Measuring

instrument

Signal generator

B1 (pin 1) GND (pin 5) [CN00X

DC voltmeter

connector in MAIN PWB]

4.7.2 FOCUS ADJUSTMENT

Item

FOCUS adjustment

Measuring

instrument

Signal generator

Test point Adjustment part Description

(1) Receive a PAL black and white signal. (2) Connect a DC voltmeter between B1 and GND

(between pins 1 and 5 of the connector CN00X).

(3) Make sure that the voltage is DC134.5V ± 2V.

Test point Adjustment part Description

FOCUS VR [In HVT]

Notes:

• Set PICTURE MODE (VSM) to "BRIGHT".

• The final adjustment of CONVERGENCE must be done after the FOCUS adjustment. (CONVERGENCE is affected by the FOCUS adjustment.) If any aeviation in CONVERGENCE is found, PURITY must be adjusted to restore the convergence.

(1) Receive a PAL crosshatch signal. (2) Adjust the FOCUS VR so that the vertical and

horizontal lines will be clear and in fine detail on the screen.

(3) Make sure that the picture is in focus even when the

screen gets darkened.

4.7.3 IF CIRCUIT ADJUSTMENTS

Item

IF VCO check

DELAY POINT (AGC

Measuring

instrument

Remote control unit

VCO (CW)

TOO HIGH ABOVE REFERENCE JUST REFERENCE BELOW REFERENCE TOO LOW

DISPLAY : EXIT

Remote control unit

. MHz

TAKE-OVER) adjustment

Adjustment item

2. DELAY POINT

(AGC TAKE-OVER)

Test point Adjustment part Description

[1. IF]

1. VCO (CW)

Note:

• Under normal conditions, no adjustment is required.

(1) Receive a PAL broadcast signal.

Receiving frequency

YELLOW

(2) Select 1. IF from the SERVICE MENU. (3) Select 1. VCO.

Check the characters colour of the

(4)

displayed to

yellow

(5) Press the [DISPLAY] key three times to return to

normal screen.

[1. IF]

2. DELAY POINT

(1)

Receive a PAL black and white broadcast signal (colour off). (2) Select 1. IF from the SERVICE MENU. (3) Select 2. DELAY POINT. (4) Adjust in order to eliminate any noise or beat from

the image. Any increase above the initial value

Initial setting value

NTSC 3.58

OTHERS

VHF UHF VHF UHF

produces the noise and any decrease below it

produces the beat. (5) Press the [DISPLAY] key three times to return to the

normal screen.

333333

(6) Turn to other channels and make sure that there are

no irregularities.

JUST REFERENCE

1-18 (No.YA281)

Page 19

4.7.4 VIDEO CIRCUIT ADJUSTMENTS

• The setting (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.

• Do not change the initial setting values of the setting (adjustment) items not listed in "ADJUSTMENT PROCEDURE".

• The initial setting values in parenthesis ( ) are fixed offset values, needing no further adjustment.

[AV-29JS25]

Initial setting value

Adjustment item Variable range

1. SCREEN BRI 0 ~ 63 32 32 32 32 32 32

2. CUTOFF B 0 ~ 63(-32 ~ +31) 11 11 11 11 (-3) (-3) G 0 ~ 63(-32 ~ +31) 7 7 7 7 (-5) (-5)

3. WDR R 0 ~ 63(-32 ~ +31) 32 32 32 32 (0) (0) G 0 ~ 63(-32 ~ +31) 32 32 32 32 (0) (0) B 0 ~ 63(-32 ~ +31) 45 45 45 45 (0) (0)

4. BRIGHT RF 0 ~ 63 39 39 39 39 --- --VIDEO 1(COMPOSITE/S) (-32 ~ +31) (0) (0) (0) (0) --- --VIDEO 2(COMPONENT) (-32 ~ +31) (-1) (-1) (-1) (-1) (+0) (+0) VIDEO 3(COMPOSITE) (-32 ~ +31) (+2) (+2) (+2) (+2) --- ---

5. CONT. RF 0 ~ 63 32 32 32 32 --- --VIDEO (-32 ~ +31) (-3) (-3) (-3) (-3) (-6) (-6)

6. COLOUR RF 0 ~ 63(-32 ~ +31) 42 32 37 +1 --- --VIDEO (-32 ~ +31) (+2) (+1) (+4) (+1) (+3) (+5)

7. TINT RF 0 ~ 63(-32 ~ +31) --- --- 27 (+3) --- --VIDEO (-32 ~ +31) --- --- (+2) (+4) --- ---

8. SHARP RF 0 ~ 63 23 23 23 23 --- --VIDEO 0 ~ 63 35 35 35 35 15 15

9. Y DELAY RF 0 ~ 15 12 9 12 4 --- --VIDEO 0 ~ 15 11 7 9 8 --- --S-VIDEO 0 ~ 15 7 7 7 7 --- ---

10. TINT DVD RF 0 ~ 63(-32 ~ +31) 34 (-7) (+0) (+0) --- --VIDEO (-32 ~ +31) (-1) (-7) (+0) (+0) (+3) (-2)

11. AMP T.SHARP RF, VIDEO 0 ~ 63 0 0 0 0 0 0

12. TWIN CONT. TWIN (RF) -15 -15 -15 -15 --- --TWIN (VIDEO) --- --- --- --- --- ---

PAL SECAM

NTSC3.58 NTSC4.43

COMPONENT (V-2)

525i 625i

[AV-29WX25/G]

Initial setting value

Adjustment item Variable range

1. SCREEN BRI 0 ~ 63 32 32 32 32 32 32

2. CUTOFF B 0 ~ 63(-32 ~ +31) 11 11 11 11 (-3) (-3) G 0 ~ 63(-32 ~ +31) 7 7 7 7 (-5) (-5)

3. WDR R 0 ~ 63(-32 ~ +31) 32 32 32 32 (0) (0) G 0 ~ 63(-32 ~ +31) 32 32 32 32 (0) (0) B 0 ~ 63(-32 ~ +31) 45 45 45 45 (0) (0)

4. BRIGHT RF 0 ~ 63 39 39 39 39 --- --VIDEO 1(COMPOSITE/S) (-32 ~ +31) (-1) (-1) (-1) (-1) --- --VIDEO 2(COMPONENT) (-32 ~ +31) (+1) (+1) (+1) (+1) (-1) (-1) VIDEO 3(COMPOSITE) (-32 ~ +31) (+1) (+1) (+1) (+1) --- ---

5. CONT. RF 0 ~ 63 32 32 32 32 --- --VIDEO (-32 ~ +31) (0) (0) (0) (0) (0) (0)

6. COLOUR RF 0 ~ 63(-32 ~ +31) 42 32 37 +1 --- --VIDEO (-32 ~ +31) (+4) (+1) (+2) (+1) (+5) (+5)

7. TINT RF 0 ~ 63(-32 ~ +31) --- --- 27 (+3) --- --VIDEO (-32 ~ +31) --- --- (+3) (+4) --- ---

8. SHARP RF 0 ~ 63 23 23 23 23 --- --VIDEO 0 ~ 63 35 35 35 35 15 15

9. Y DELAY RF 0 ~ 15 11 9 10 4 --- --VIDEO 0 ~ 15 9 8 3 10 --- --S-VIDEO 0 ~ 15 7 7 7 7 --- ---

10. TINT DVD RF 0 ~ 63(-32 ~ +31) 34 (-7) (+0) (+0) --- --VIDEO (-32 ~ +31) (-3) (-7) (+0) (+0) (+3) (-2)

11. AMP T.SHARP RF, VIDEO 0 ~ 63 0 0 0 0 0 0

12. TWIN CONT. TWIN (RF) -15 -15 -15 -15 --- --TWIN (VIDEO) --- --- --- --- --- ---

PAL SECAM

NTSC3.58 NTSC4.43

COMPONENT (V-2)

525i 625i

(No.YA281)1-19

Page 20

Item

WHITE BALANCE (Low light) adjustment

Measuring

instrument

Signal generator

Remote control unit

B CUTOFF (

V/C

2. CUTOFF

REMOTE CONTROL UNIT

12 3

)



789



)

Test point Adjustment part Description

[2. V/C]

2. CUTOFF (B)

2. CUTOFF (G)

Note:

• Set PICTURE MODE (VSM) to "BRIGHT".

- COMPOSITE WHITE BALANCE -

(1) Receive a PAL black and white signal (colour off).

SCREEN VR [In HVT]

(2) Select 2. V/C from the SERVICE MENU. (3) Select 2. CUTOFF (B) and (G). (4) Set each value to initial setting value with the [4] / [7]

keys and [5] / [8] keys.

(5) Turn the SCREEN VR fully counterclockwise, then

PAL

(B)

(G)

(**)

)

(

slowly turn it clockwise to where a red, blue or green colour is faintly visible.

(6) Use the [4] / [7] and [5] / [8] keys to adjust so that

the other 2 colours appear white.

(7) Turn the SCREEN VR to where the single horizontal

line glows faintly.

(8) Press the [DISPLAY] key twice to return to the normal

screen.

- COMPONENT WHITE BALANCE -

(1) Receive a PAL component black and white signal

(colour off).

(2) Select VIDEO-2 SET from the MENU and set

VIDEO-2 SET to COMPONENT.

G CUTOFF ( )

(3) Adjust COMPONENT WHITE BALANCE in the

same way as "COMPOSITE WHITE BALANCE".

Adjustment

range

0 ~ 63 (-32~+31)

G CUTOFF (

Item



)

2. CUT OFF

B 0 ~ 63 (-32~+31)

Initial setting valueVariable

COMPOSITE COMPONENT

(-3)

(-5)

WHITE BALANCE (High light) adjustment

Signal generator

Remote control unit

V/C

3. WDR

REMOTE CONTROL UNIT

12 3

R DRIVE (

) B DRIVE ()





R DRIVE (

)

789

PAL

[2. V/C]

3. WDR (R)

3. WDR (G)

3. WDR (B)

(R)

(G)

(B)

**(**

G DRIVE ()

B DRIVE (

G DRIVE (

(**)

(

Notes:

• Proceed to the following adjustment after having completed the WHITE BALANCE (Low light) adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".

(1) Receive a PAL black and white signal (colour off). (2) Select 2. V/C from the SERVICE MENU. (3) Select 3. WDR (R), (G) and (B). (4) Set each value to initial setting value with the [4] to

[9] keys.

) )

(5) Use the [4] to [9] keys to produce a white screen. (6) Press the [DISPLAY] key twice to return to the normal

screen.

Adjustment Item

3. WDR G



)



)

Variable Initial setting

range value

0 ~ 63

1-20 (No.YA281)

Page 21

Item

SUB BRIGHT adjustment

SUB CONTRAST adjustment

SUB COLOUR 1 adjustment

Measuring instrument

Remote control unit

Test point Adjustment part Description

[2. V/C]

4. BRIGHT

Notes:

• Proceed to the following adjustment after having completed the WHITE BALANCE (Low light) and WHITE BALANCE (High light) adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".

(1) Receive a PAL broadcast. (2) Select 2. V/C from the SERVICE MENU. (3) Select 4. BRIGHT. (4) Set the initial setting value. (5) If the brightness is not best with the initial setting value,

make fine adjustment until you get the best brightness.

(6) Press the [DISPLAY] key twice to return to the

normal screen.

[2. V/C]

5. CONT

Notes:

• Proceed to the following adjustment after having completed the SUB BRIGHT adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".

(1) Receive a PAL broadcast. (2) Select 2. V/C from the SERVICE MENU. (3) Select 5. CONT. (4) Set the initial setting value. (5) If the contrast is not best with the initial setting value,

make fine adjustment until you get the best contrast.

(6) Press the [DISPLAY] key twice to return to the

normal screen.

[2. V/C]

6. COLOUR

[Method of adjustment without measuring instrument] Notes:

• Proceed to the following adjustment after having completed the SUB CONTRAST adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".

- PAL COLOUR -

(1) Receive a PAL broadcast. (2) Select 2. V/C from the SERVICE MENU. (3) Select 6. COLOUR. (4) Set the initial setting value for PAL COLOUR. (5) If the colour is not best with the initial setting value,

adjust until you get the best colour.

(6) Press the [DISPLAY] key twice to return to the

normal screen.

- SECAM COLOUR -

(1) Receive a SECAM broadcast. (2) Press the [COLOUR SYSTEM] key to select the

SECAM colour system.

(3) Adjust SECAM COLOUR in the same way as for

"PAL COLOUR".

- NTSC 3.58 COLOUR -

(1) Receive a NTSC 3.58MHz broadcast. (2) Press the [COLOUR SYSTEM] key to select the

NTSC 3.58 colour system.

(3) Adjust NTSC 3.58 COLOUR in the same way as for

"PAL COLOUR".

- NTSC 4.43 COLOUR -

When adjustment is done for NTSC 3.58 COLOUR, appropriate values are automatically set for NTSC 4.43 COLOUR.

(No.YA281)1-21

Page 22

Item

SUB COLOUR 2 adjustment

Measuring

instrument

Signal generator

Oscilloscope

Remote control unit

WY CGW MRB

Test point Adjustment part Description

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

[2. V/C]

6. COLOUR

[Method of adjustment using measuring instrument] Notes:

• Proceed to the following adjustment after having completed the SUB CONTRAST adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".

- PAL COLOUR -

(1) Receive a PAL colour bar signal (full field colour bar

75% white). (2) Select 2. V/C from the SERVICE MENU. (3) Select 6. COLOUR. (4) Set the initial setting value of PAL COLOUR. (5) Connect the oscilloscope between TP-47B and TP-E. (6) Adjust PAL COLOUR to set the value (A) in the

figure to +31V [AV-29JS25] or +29V [AV-29WX25/

(A)

()

() 0V

0V (+)

(+)

G].

- SECAM COLOUR -

(1) Receive a SECAM colour bar signal (colour bar 75%

white). (2) Press the [COLOUR SYSTEM] key to select the

SECAM colour system. (3) Set the initial setting value of SECAM COLOUR. (4) Adjust SECAM COLOUR to set the value (A) in the

figure to -5V [AV-29JS25] or -10V [AV-29WX25/G].

- NTSC 3.58 COLOUR -

(1) Receive a NTSC 3.58 colour bar signal (full field

colour bar 75% white). (2) Press the [COLOUR SYSTEM] key to select the

NTSC 3.58 colour system. (3) Set the initial setting value of NTSC 3.58 COLOUR. (4) Adjust NTSC 3.58 COLOUR to set the value (A) in

the figure to +18V [AV-29JS25] or +21V [AV-

29WX25/G].

- NTSC 4.43 COLOUR -

When adjustment is done for NTSC 3.58 COLOUR, appropriate values are automatically set for NTSC 4.43 COLOUR.

1-22 (No.YA281)

Page 23

Item

SUB TINT 1 adjustment

SUB TINT 2 adjustment

Measuring instrument

Signal generator

Remote control unit

Signal generator

Oscilloscope

Remote control unit

WY CGWMRB

Test point Adjustment part Description

[2. V/C]

7. TINT

[Method of adjustment without measuring instrument]

Notes:

• Proceed to the following adjustment after having completed the SUB CONTRAST adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".

- PAL TINT -

(1) Receive a PAL colour bar signal (full field colour bar

75% white).

(2) Press the [COLOUR SYSTEM] key to select the PAL

colour system. (3) Select 2. V/C from the SERVICE MENU. (4) Select 7. TINT. (5) Set the initial setting value of PAL Phase. (6) If you cannot get the best tint with the initial setting

value, make fine adjustment until you get the best

tint. (7) Press the [DISPLAY] key twice to return to the

normal screen.

- NTSC 3.58 TINT -

(1) Receive a NTSC 3.58 colour bar signal (full field

colour bar 75% white). (2) Press the [COLOUR SYSTEM] key to select the

NTSC 3.58 colour system. (3) Select 2. V/C from the SERVICE MENU. (4) Select 7. TINT. (5) Set the initial setting value of NTSC 3.58. (6) If you cannot get the best tint with the initial setting

value, make fine adjustment until you get the best

tint. (7) Press the [DISPLAY] key twice to return to the

normal screen.

- NTSC 4.43 TINT -

When adjustment is done for NTSC 3.58 TINT, appropriate values are automatically set for NTSC 4.43 TINT.

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

[2. V/C]

7. TINT

[Method of adjustment using measuring instrument]

Notes:

• Proceed to the following adjustment after having

completed the SUB CONTRAST adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".

- NTSC 3.58 TINT -

(1) Receive a NTSC 3.58 colour bar signal (full field

colour bar 75% white). (2) Press the [COLOUR SYSTEM] key to select the

NTSC 3.58 colour system.

(B)

(3) Select 2. V/C from the SERVICE MENU. (4) Select 7. TINT. (5) Set the initial setting value of NTSC 3.58.

() 0V

(+)

(6) Connect the oscilloscope between TP-47B and TP-E. (7) Adjust NTSC 3.58 TINT to set the value (B) in the

figure to +2V [AV-29JS25] or +7V [AV-29WX25/G]. (8) Press the [DISPLAY] key twice to return to the

normal screen.

- NTSC 4.43 TINT -

When adjustment is done for NTSC 3.58 TINT, appropriate values are automatically set for NTSC 4.43 TINT.

(No.YA281)1-23

Page 24

4.7.5 AUDIO SETTING

This submenu is for display only, no adjustment is required.

[AV-29JS25]

Function Item Setting value

AUDIO 1. DC XO ADJ 0E

2. NICAM LOWER ERR LIM 6FH

3. NICAM UPPER ERR LIM B0H

4. A2 ID THR 00H

[AV-29JS25]

Function MODE Item 100Hz 300Hz 1kHz 3kHz 8kHz

MENU EQUALIZER RF SOUND TURBO +9 +6 +4 +8 +10

THEATER +4 +2 -10 +5 +7 MUSIC +5+1-6+4+9 NEWS -5 -4 +0 -2 -5 USER +0 +0 +0 +0 +0

VIDEOSOUND TURBO +9+6+4+8+11

THEATER +4 +2 -10 +5 +7 MUSIC +5+1-6+4+10 NEWS -5 -4 +0 -2 -5 USER +0 +0 +0 +0 +0

DVDSOUND TURBO +9+6+4+8+11

THEATER +4 +2 -10 +5 +7 MUSIC +5+1-6+4+10 NEWS -5 -4 +0 -2 -5 USER +0 +0 +0 +0 +0

[AV-29WX25/G]

Function MODE Item 100Hz 300Hz 1kHz 3kHz 8kHz

MENU EQUALIZER RF SOUND TURBO +12 +5 +3 +8 +9

THEATER +5+3-9+6+8 MUSIC +4+2+1+3+7 NEWS -5 -4 +0 -2 -5 USER +0 +0 +0 +0 +0

VIDEO SOUND TURBO +12 +6 +5 +9 +12

THEATER +5+3-9+6+8 MUSIC +4+2+2+3+7 NEWS -5 -4 +0 -2 -5 USER +0 +0 +0 +0 +0

DVD SOUND TURBO +12 +6 +5 +9 +12

THEATER +5+3-9+6+8 MUSIC +4+2+2+3+7 NEWS -5 -4 +0 -2 -5 USER +0 +0 +0 +0 +0

1-24 (No.YA281)

Page 25

4.7.6 DEFLECTION CIRCUIT ADJUSTMENTS

• The setting (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.

• When performing deflection circuit adjustment, adjusts PAL signal (fv: 50 Hz) in 4:3 mode and 16:9 mode respectively, and adjust the NTSC signal (fv: 60 Hz) similarly.

Note:

Proceed to the following adjustment after having completed the adjustments of SUB BRIGHT and SUB PICTURE.

 4. DEF

Initial setting value

Adjustment item

Variable range

4:3 COMPRESS (16:9)

4:3 50Hz Others 50Hz 60Hz 50Hz 60Hz

1. V-SHIFT 0 ~ 63 -32 ~ +31 0* 0* 0* 0*

2. V-SLOPE 0 ~ 63 -32 ~ +31 0* 0* 0* 0*

3. V-SIZE 0 ~ 63 -32 ~ +31 +15 0* -4 -2

4. H-CENT 0 ~ 63 -32 ~ +31 +35 0* 0* 0*

5. H-SIZE 0 ~ 63 -32 ~ +31 +45 0* 0* 0*

6. TRAPEZ 0 ~ 63 -32 ~ +31 0* 0* 0* 0*

7. EW-PIN 0 ~ 63 -32 ~ +31 -12* 0* 0* 0*

8. COR-UP 0 ~ 63 -32 ~ +31 0* 0* 0* 0*

9. COR-LO 0 ~ 63 -32 ~ +31 0* 0* 0* 0*

10. ANGLE 0 ~ 63 -32 ~ +31 0* 0* 0* 0*

11. BOW 0 ~ 63 -32 ~ +31 0* 0* 0* 0*

12. V-S.CR 0 ~ 63 -32 ~ +31 0* 0* 0* 0*

13. V-LIN 0 ~ 63 -32 ~ +31 0* 0* 0* 0*

14. V-ZOOM 0 ~ 63 -32 ~ +31 (+25 ~+32) (0) -23* +3*

15. V-SCROLL 0 ~ 63 -32 ~ +31 (+32) (0) (0) (0)

NOTE: The value with an asterisk * is variable for adjustment. The values in parenthesis ( ) are fixed values.

V-ZOOM DATA can adjust follow data range in case measurement line power on is appeared.

(No.YA281)1-25

Page 26

 COMPRESS: OFF (4:3)

Item

V. SLOPE adjustment

Measuring

instrument

Signal generator

Remote control unit

V. POSITION adjustment

Signal generator

Remote control unit

Test point Adjustment part Description

[4. DEF]

2. V-SLOPE

- PAL V. SLOPE -

(1) Receive a PAL circle pattern signal of vertical

frequency 50Hz. (2) Select 4. DEF from the SERVICE MENU. (3) Select 2. V-SLOPE. (4) Set the initial setting value of 2. V-SLOPE. (5) Adjust 2. V-SLOPE to make "A = B". (6) Press the [DISPLAY] key twice to return to

Blanking line

SERVICE MENU screen.

- NTSC V. SLOPE -

(1) Receive a NTSC circle pattern signal of vertical

frequency 60Hz. (2) Make similar adjustment of NTSC V-SLOPE in the

same way as for "PAL V-SLOPE".

[4. DEF]

1. V-SHIFT

- PAL V. POSITION -

(1) Receive a PAL circle pattern signal of vertical

frequency 50Hz. (2) Select 1. V-SHIFT. (3) Set the initial setting value of 1. V-SHIFT. (4) Adjust 1. V-SHIFT to make "A = B".

- NTSC V. POSITION -

(1) Receive a NTSC circle pattern signal of vertical

frequency 60Hz. (2) Make similar adjustment of NTSC V. POSITION in

the same way as for "PAL V. POSITION".

V. HEIGHT adjustment

H. POSITION adjustment

Screen

size

92%

Signal generator

[4. DEF]

3. V-SIZE

Remote control unit

Picture size 100%

Signal generator

[4. DEF]

4. H-CENT

Remote control unit

- PAL V. HEIGHT -

(1) Receive a PAL crosshatch signal. (2) Select 3. V-SIZE. (3) Set the initial setting value of 3. V-SIZE. (4) Adjust 3. V-SIZE to make the vertical screen size to

92% of the picture size.

- NTSC V. HEIGHT -

(1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC V. HEIGHT in the

same way as for "PAL V. HEIGHT".

- PAL H. POSITION -

(1) Receive a PAL circle pattern signal. (2) Select 4. H-CENT. (3) Set the initial setting value of 4. H-CENT. (4) Adjust 4. H-CENT to make "C = D".

- NTSC H. POSITION -

(1) Receive a NTSC circle pattern signal. (2) Make similar adjustment of NTSC H. POSITION in

the same way as for "PAL H. POSITION".

1-26 (No.YA281)

Page 27

Item

H. WIDTH adjustment

Measuring instrument

Signal generator

Remote control unit

Test point Adjustment part Description

[4.DEF]

5. H-SIZE

- PAL H. WIDTH -

(1) Receive a PAL crosshatch signal. (2) Select 5. H-SIZE. (3) Set the initial setting value of 5. H-SIZE. (4) Adjust 5. H-SIZE to make the horizontal screen size

Screen size 91%

to 91% of the picture size.

- NTSC H. WIDTH -

(1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC H. WIDTH in the

same way as for "PAL H. WIDTH".

Picture size 100%

SIDE PIN adjustment

TRAPEZIUM adjustment

Signal generator

Remote control unit

Signal generator

Remote control unit

Straight

Parallel

[4. DEF]

7. EW-PIN

[4.DEF]

6. TRAPEZ

- PAL SIDE PIN -

(1) Receive a PAL crosshatch signal. (2) Select 7. EW-PIN. (3) Set the initial setting value of 7. EW-PIN. (4) Adjust 7. EW-PIN so that the first vertical lines at the

left and right edges on the screen are straight.

- NTSC SIDE PIN -

(1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC SIDE PIN in the

same way as for "PAL SIDE PIN".

- PAL TRAPEZIUM -

(1) Receive a PAL crosshatch signal. (2) Select 6. TRAPEZ. (3) Set the initial setting value of 6. TRAPEZ. (4) Adjust 6. TRAPEZ so that the vertical lines at the left

and right edges on the screen are in parallel.

- NTSC TRAPEZIUM -

(1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC TRAPEZIUM in

the same way as for "PAL TRAPEZIUM".

(No.YA281)1-27

Page 28

Item

V.LINEARITY adjustment

Measuring

instrument

Signal generator

Remote control unit

Test point Adjustment part Description

[4. DEF]

12. V-S. CR

13. V-LIN

- PAL V. LINEARITY -

(1) Receive a PAL crosshatch signal. (2) Select 12. V-S.CR. (3) Set the initial setting value of 12. V-S. CR. (4) Select 13. V-LIN. (5) Set the initial setting value of 13. V-LIN.

TOP

(6) Adjust 12. V-S. CR and 13. V-LIN so that the spaces

of each line on TOP, CENTRE and BOTTOM

become uniform.

- NTSC V. LINEARITY -

CENTRE

(1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC V-S. CR in the

same way as for "PAL V-S. CR".

BOTTOM

CORNER PIN adjustment

H. PARALLEL adjustment

Signal generator

Remote control unit

Signal generator

Remote control unit

Straigt

Parallel

[4. DEF]

8. COR-UP

9. COR-LO

[4.DEF]

10. ANGLE

- PAL CORNER PIN -

(1) Receive a PAL crosshatch signal. (2) Select 8. COR-UP. (3) Set the initial setting value of 8. COR-UP. (4) Select 9. COR-LO. (5) Set the initial setting value of 9. COR-LO. (6) Adjust 8. COR-UP and 9. COR-LO so that the

vertical lines at the four corners on the screen are

straight.

- NTSC CORNER PIN -

(1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC CORNER in the

same way as for "PAL CORNER".

- PAL H. PARALLEL -

(1) Receive a PAL crosshatch signal. (2) Select 10. ANGLE. (3) Set the initial setting value of 10. ANGLE. (4) Adjust 10. ANGLE to optimize the trapezium

distortion at the centre of the screen.

- NTSC H. PARALLEL -

(1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC H. PARALLEL in

the same way as for "PAL H. PARALLEL".

1-28 (No.YA281)

Page 29

Item

H. BOW adjustment

Measuring instrument

Signal generator

Remote control unit

 COMPRESS : ON (16:9)

Item

V. HEIGHT adjustment

Measuring instrument

Signal generator

Remote control unit

Screen

size

V. SLOPE adjustment

Signal generator

Remote control unit

Test point Adjustment part Description

[4.DEF]

11. BOW

- PAL H. BOW -

(1) Receive a PAL crosshatch signal. (2) Select 11. BOW. (3) Set the initial setting value of 11. BOW. (4) Adjust 11. BOW to optimize the horizontal arc

distortion.

Straight

- NTSC H. BOW -

(1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC H. BOW in the

same way as for "PAL H. BOW".

(3) Press the [DISPLAY] key twice to return to the

normal screen.

Test point Adjustment part Description

[4.DEF]

14. V. ZOOM

3. V-SIZE

- PAL V. HEIGHT -

(1) Receive a PAL crosshatch signal of vertical

frequency 50Hz. (2) Press the [MENU] key and select PICTURE. (3) Select PICTURE FEATURES.

Screen size

(4) Select COMPRESS (16 : 9) and set COMPRESS to

ON. (5) Select 4. DEF from the SERVICE MENU. (6) Set the initial setting value of 14. V. ZOOM. (7) Select 3. V-SIZE. (8) Set the initial setting value of 3. V-SIZE.

Vertical amplitude

(9) Adjust 3. V-SIZE to set the vertical amplitude of the

image to 305mm.

- NTSC V. HEIGHT -

(1) Receive a NTSC crosshatch signal of vertical

frequency 60Hz.

(2) Make similar adjustment of NTSC V. HEIGHT in

the same way as for "PAL V. HEIGHT".

[4.DEF]

2. V-SLOPE

- PAL V. SLOPE -

(1) Receive a PAL circle pattern signal of vertical

Blanking

line

MENU screen.

- NTSC V. SLOPE -

(1) Receive a NTSC circle pattern signal of vertical

frequency 60Hz.

(2) Make similar adjustment of NTSC V-SLOPE in the

same way as for "PAL V-SLOPE".

(No.YA281)1-29

Page 30

Item

SIDE PIN adjustment

Measuring

instrument

Signal generator

Remote control unit

Test point Adjustment part Description

[4. DEF]

7. EW-PIN

- PAL SIDE PIN -

(1) Receive a PAL crosshatch signal. (2) Select 7. EW-PIN. (3) Set the initial setting value of 7. EW-PIN. (4) Adjust 7. EW-PIN so that the first vertical lines at the

left and right edges on the screen are straight.

Straight

- NTSC SIDE PIN -

(1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC SIDE PIN in the

same way as for "PAL SIDE PIN".

TRAPEZIUM adjustment

CORNER PIN adjustment

Signal generator

Remote control unit

Signal generator

Remote control unit

Parallel

Straigt

[4. DEF]

6. TRAPEZ

[4. DEF]

8. COR-UP

9. COR-LO

- PAL TRAPEZIUM PIN -

(1) Receive a PAL crosshatch signal. (2) Select 6. TRAPEZ. (3) Set the initial setting value of 6. TRAPEZ. (4) Adjust 6. TRAPEZ so that the vertical lines at the left

and right edges on the screen are in parallel.

- NTSC TRAPEZIUM PIN -

(1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC TRAPEZIUM in

the same way as for "PAL TRAPEZIUM".

- PAL CORNER PIN -

vertical lines at the four corners on the screen are straight.

- NTSC CORNER PIN -

(1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC CORNER in the

same way as for "PAL CORNER".

(3) Press the [DISPLAY] key twice to return to the

normal screen.

1-30 (No.YA281)

Page 31

 VIDEO - 2 SET: COMPONENT

Item

H. POSITION adjustment

Measuring instrument

Signal generator

Remote control unit

4.7.7 VSM PRESET SETTING

Test point Adjustment part Description

[4. DEF]

4. H-CENT

(1) Receive a PAL circle pattern signal to VIDEO-2

component terminal. (2) Select VIDEO-2 SET from the MENU and set

VIDEO-2 SET to COMPONENT. (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 4. H-CENT to make "C=D". (7) Press the [DISPLAY] key twice to return to the

normal screen.

Item

VSM PRESET setting

Measuring instrument

Remote control unit

SUB MENU 5. VSM W/B

VSM PRESET BRIGHT

1. BRIGHT

Test point Adjustment part Description

[5. VSM W/B]

1. BRIGHT

2. CONT

3.COLOUR

4. SHARP

5. HUE

1. R-DRIVE

2. G-DRIVE

3. B-DRIVE

(1) Select 5. VSM W/B from the SERVICE MENU. (2) Select BRIGHT with the MENU [OK] key. (3) Set the value of 1. BRIGHT ~ 5. HUE to the values

shown in the table. (4) Respectively select the VSM PRESET mode for

SOFT and STANDARD. (5) Select COOL with the MENU [OK] key. (6) Set the values of 1. R-DRIVE ~ 3. B-DRIVE to the

value shown in the table. (7) Select the W/B preset for WARM and NORMAL,

respectively. (8) Press the [DISPLAY] key twice to return to the

normal screen.

***

[Setting Values for SUB 5. VSM W/B]

VSM preset

BRIGHT STANDARD SOFT

Setting item

1. BRIGHT 0

2. CONT +15 +10

3. COLOUR 00

4. SHARP 0-5

5. HUE 00

W/B preset

COOL

Setting item

1. R-DRIVE 0

2. G-DRIVE 0

3. B-DRIVE 0

-4

NORMAL

-10

WARM

+10

-4

-12

(No.YA281)1-31

Page 32

4.7.8 PURITY AND CONVERGENCE

 PURITY ADJUSTMENT

Note:

The final adjustment of CONVERGENCE must be done after the FOCUS adjustment. (CONVERGENCE is changed by FOCUS adjustment.) When makes difference by FOCUS adjustment, should be reconfirming PURITY adjustment.

(1) Demagnetize CRT with the demagnetizer.

(2) Loosen the retainer screw of the deflection yoke.

CRT

WEDGE

DEFLECTION YOKE

4 6

P / C

MAGNETS

(3) Remove the wedges.

(4) Input a green raster signal from the signal generator, and

turn the screen to green raster.

(5) Move the deflection yoke backward.

(6) Bring the long lug of the purity magnets on the short lug and

position them horizontally. (Fig.2)

(7) Adjust the gap between two lugs so that the GREEN

RASTER will come into the centre of the screen. (Fig.3)

(8) Move the deflection yoke forward, and fix the position of the

deflection yoke so that the whole screen will become green.

(9) Insert the wedge to the top side of the deflection yoke so that

it will not move.

(10) Input a crosshatch signal.

• P/C MAGNETS

P : PURITY MAGNET 4 : 4 POLES (convergence magnets) 6 : 6 POLES (convergence magnets)

Fig.1

PURITY MAGNETS

Long lug

Short lug

Bring the long lug over the short lug and position them horizontally.

Fig.2

(FRONT VIEW)

GREEN RASTER

(11) Verify that the screen is horizontal.

(12) Input red and blue raster signals, and make sure that purity

is properly adjusted.

1-32 (No.YA281)

CENTRE

Fig.3

Page 33

 STATIC CONVERGENCE ADJUSTMENT

(1) Input a crosshatch signal.

(2) Using 4-pole convergence magnets, overlap the red and

blue lines in the centre of the screen (Fig.1) and turn them to magenta (red/blue).

(3) Using 6-pole convergence magnets, overlap the magenta

(red/blue) and green lines in the centre of the screen and turn them to white.

(4) Repeat 2 and 3 above, and make best convergence.

(FRONT VIEW)

Fig.1

(FRONT VIEW)

 DYNAMIC CONVERGENCE ADJUSTMENT

(1) Move the deflection yoke up and down and overlap the lines

in the periphery. (Fig. 2)

(2) Move the deflection yoke left to right and overlap the lines in

the periphery. (Fig. 3)

(3) Repeat 1 and 2 above, and make best convergence.

(4) Adjust XV by XV coil. (Fig.4)

• After adjustment, fix the wedge at the original position. Fasten the retainer screw of the deflection yoke. Fix the P/C magnets with glue.

GREEN

RED

BLUE

GREEN

Fig.2

(FRONT VIEW)

GREEN GREEN

RED

BLUE

Fig.3

BLUE

RED

GREENGREEN

BLUE

RED

GREEN BLUE

BLUE GREEN

RED

(FRONT VIEW)

GREEN

Fig.4

(No.YA281)1-33

Page 34

SECTION 5

TROUBLESHOOTING

5.1 SELF CHECK FUNCTIONS

5.1.1 OUTLINE

This model has self check functions given below. When an abnormality has been detected, the SUB POWER is turned off and POWER LED flashes to inform of the failure. An abnormality is detected by the signal input state of the control line connected to the microcomputer.

5.1.2 SELF CHECK ITEMS

Check item Details of detection Method of detection State of abnormality

B1 over-current protection An over-current on the low B1

line is detected.

CRT neck broken protection Operation of CRT neck

protection circuit.

5.1.3 SELF CHECK INDICATING FUNCTION

When an abnormality has been detected at about 5 seconds after the power was turned on, the SUB POWER is turned off immediately and the POWER LED flashes.

The main microcomputer detects the possible abnormality at 24-msec. intervals and judges the results in every 16 time. Of the 16 times, if NG is detected more than 9 times, it is judged that there is an abnormality.

After about 5 seconds

When an abnormality has been detected, the SUB-POWER is turned off. While the SUBPOWER is being turned off, the POWER key on the remote control unit is not operational until the power cord is disconnected and connected again.

Detection of an abnormality

Powe r o n Port

[ INDICATION BY THE POWER LED]

Item LED flashing intervals

B1 over-current protection / CRT neck broken protection 0.3 seconds

Start of detection

Flashing LED

SUB-POWER OFF

1-34 (No.YA281)

Page 35

(No.YA281)1-35

Page 36

Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY DISPLAY CATEGORY 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan

(No.YA281)

Printed in Japan

VPT