JVC AV-29VT15, AV-29VT35 Schematic

SERVICE MANUAL

FLAT COLOR TELEVISION

YA25620051

AV-29VT15/R, AV-29VT35

BASIC CHASSIS

TABLE OF CONTENTS

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

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

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

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

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32

No.YA256

2005/4

SPECIFICATION

Items

Dimensions (W × H × D) 81.2cm × 58.42cm × 52.05cm

Mass 41kg 43.4kg

TV RF System M / N

Color System TV Mode

Video Mode

Stereo System MTS (Multi-Channel Television Sound)

Receiving Frequency VHF Low

VHF High

Intermediate Frequency

Color Sub Carrier Frequency 3.58MHz (NTSC)

Aerial Input Terminal 75Ω unbalanced, coaxial

Power Input AC110V-AC240V, 50Hz / 60Hz (Operating Voltage 90V ~ 260V)

Power Consumption 166W (Max.) / 109W (Avg.) 215W (Max.) / 130W (Avg.)

Picture Tube A68QCU770X52TD

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

High Voltage 32kV -1.5kV / +1.0kV (at zero beam current)

Speaker 6.5cm × 13cm, Oval type × 26.5cm × 13cm, oval type × 2

Audio Output 10W + 10W 7W + 7W + 13W

Video / Audio Input [1/2/3]

Video / Audio Output Video

Headphone 3.5mm stereo mini jack × 1

Remote Control Unit RM-C1288-1H

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]

NTSC / PAL-M / PAL-N NTSC / PAL-M / PAL-N

46.25 MHz ~ 140.25 MHz (AS0 ~ S6)

147.25 MHz ~ 423.25 MHz (S7 ~ S36)

UHF

431.25 MHz ~ 863.25 MHz (S37 ~ C57)

CATV

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

VIF 38.0MHz

SIF 33.5MHz (4.5MHz)

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

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

1V(p-p), 75Ω, RCA pin jack × 1

Audio

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

(AA/R06/UM-3 battery × 2)

AV-29VT15/R AV-29VT35/R

Contents

13cm, round type × 1 (Bass blaster unit)

Design & specifications are subject to change without notice.

1-2 (No.YA256)

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.YA256)1-3

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-29VT15/R AV-29VT35/R

BASS BLASTER None BASS BLASTER UNIT

AUDIO OUTPUT 10W + 10W 7W + 7W + 13W

POWER CONSUMPTION 166W (Max.) / 109W (Avg.) 215W (Max.) / 130W (Avg.)

1-4 (No.YA256)

2.3 FUNCTIONS

 REMOTE CONTROL UNIT

RM-C1288-1H

COLOR SYSTEM key

FAVORITE CHANNEL keys

DISPLAY BACK key

MENU ( / , / ) keys

CLOSED CAPTION key

SOUND TURBO key

PICTURE MODE key

RETURN + key

OFF TIMER key

CHANNEL (-/+) keys

ECO key

POWER key

TV / VIDEO key

MENU (OK) key

MUTING key

Number keys

100+ key

VOLUME (-/+) keys

BASS key [AV-29VT35/R]

CINEMA SURROUND key

 FRONT PANEL CONTROLS

L/MONO

IN (VIDEO-3)

HEADPHONE jack

IN (VIDEO-3) : VIDEO

IN (VIDEO-3) : AUDIO L/MONO

IN (VIDEO-3) : AUDIO R

MENU (OK) button

CHANNEL (-/+) buttons

POWER

11 12

CHANNEL

VOLUME

6 7

TV/VIDEO

EXIT

VOLUME (-/+) buttons

TV/VIDEO EXIT buttons

Remote control sensor

ECO sensor

POWER lamp

MAIN POWER button

(No.YA256)1-5

 REAR TERMINAL [AV-29VT15/R]

VIDEO-1

INPUT

OVER

MONO

5 6 10 118

COMPONENT

(VIDEO-2)

INPUT

MONO

OUTPUT

VIDEO-1 INPUT TERMINAL

S-VIDEO

VIDEO

AUDIO L/MONO

AUDIO R

COMPONENT (VIDEO-2) INPUT TERMINAL

Y/VIDEO

AUDIO L/MONO

AUDIO R

OUTPUT TERMINAL

VIDEO

AUDIO L

AUDIO R

[AV-29VT35/R]

BASS

SPEAKER

OUT

VIDEO-1

INPUT

OVER

MONO

5 6 10 118

COMPONENT

(VIDEO-2)

INPUT

MONO

OUTPUT

Aerial input terminal

VIDEO-1 INPUT TERMINAL

S-VIDEO

VIDEO

AUDIO L/MONO

AUDIO R

COMPONENT (VIDEO-2) INPUT TERMINAL

Y/VIDEO

AUDIO L/MONO

AUDIO R

OUTPUT TERMINAL

VIDEO

AUDIO L

AUDIO R

1-6 (No.YA256)

BASS BLASTER UNIT OUTPUT TERMINAL

BASS SPEAKER OUT

Aerial input terminal

2.4 MAIN CPU [MAIN PWB : IC701] PIN FUNCTION

Pin no. Pin name I/O Remark

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 24.567MHz for system clock

11 XtalOut O 24.567MHz 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 QssO/AmO/AudeEm O QSS intercarrier output / AM output /

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 2 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 Headphone L

63 HP_R O Headphone R

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

deemphasis / (front-end audio out)

Pin no. Pin name I/O Remark

64 CVBSO/PIP O CVBS / PIP output

65 SVM O Scan velocity modulation output

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 P11/TO I POWER LED control

100 V1.8C2 I 1.8V

101 VssC2 - GND

102 COMPONENT-PIP - Not used

103

COMB_SW_NT3.5/OTHER

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 clock

110 V3.3P I 3.3V

111 ROTATION O ROTATION

112 3.58/OTHER O

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 P24/PWM3 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)

- Not used

NTSC 3.58 detection

(No.YA256)1-7

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

3.1.1 REMOVING THE TWIN PORT BASS BLASTER UNIT

[AV-29VT35/R]

• Unplug the power supply cord. (1) Disconnect the TWIN PORT BASS BLASTER UNIT's cord

from the rear of the TV set.

(2) Remove the TWIN PORT BASS BLASTER UNIT by pulling

it upwards.

NOTE:

After removing the TWIN PORT BASS BLASTER UNIT, proceed to the following procedure.

3.1.2 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.

3.1.3 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.

3.1.6 REMOVING THE SPEAKER

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

SPEAKER.

3.1.7 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.

3.1.8 WIRE CLAMPING AND CABLE TYING

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

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

3.1.4 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.

3.1.5 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.)

1-8 (No.YA256)

FRONT CABINET

PICTURE TUBE

SPEAKER

(X2)

[FRONT SIDE]

CONTROL BASE

CHASSIS BASE

Fig.2

SPEAKER

REAR COVER

FRONT CONTROL PWB (1/2)

(X2)

CONTROL BASE

CRT SOCKET PWB

CHASSIS BASE

CLAW B (under side)

BASS SPEAKER OUT JACK

[AV-29VT35/R]

Fig.2

FRONT CONTROL PWB (2/2)

CLAW B (under side)

MAIN PWB

FBT

AV TERMINAL BOARD

(×4)

Fig.1

(×16)

TWIN PORT BASS BLASTER UNIT [AV-29VT35/R]

(No.YA256)1-9

3.2 REPLACEMENT OF MEMORY IC

3.2.1 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".

3.2.2 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

SYSTEM OTHERS COMB TILT SUPER BASS

: SEL  : OPE



SET 1

YES YES NO

DISP : EXIT

SYSTEM CONSTANT-2

SYSTEM CONSTANT SET 2

SOUND BLUE BACK MUTE ECO SENSOR

: SEL  : OPE



STEREO NO YES

DISP : EXIT

SYSTEM CONSTANT-3

SYSTEM CONSTANT SET 3

SURROUND



: SEL  : OPE

YES NOPICTURE BOOSTER YESCOMPONENT YESS INPUT

DISP : EXIT

Fig.2

DISPLAY / BACK

PICTURE MODE

1-10 (No.YA256)

3.2.3 FACTORY SETTING VALUE

 SETTING OF SYSTEM CONSTANT SET

Setting item Setting content

SYSTEM OTHERS

COMB YES

TILT YES

SUPER BASS YES

SOUND STEREO

BLUE BACK MUTE NO

ECO SENSOR YES

SURROUND YES

PICTURE BOOSTER NO

COMPONENT YES

S INPUT YES

TAIWAN OTHERS

YES NO

STEREO PB MONO

YES NO

AV-29VT15/R AV-29VT35/R

Setting

value

Table 1

(No.YA256)1-11

 SETTING OF BASIC FUNCTIONS

Setting item Setting value

POWER Off

SUB POWER On

VOLUME 15

COLOR SYSTEM PAL-N

PICTURE MODE (VSM) BRIGHT

CINEMA SURROUND OFF

SUPER BASS ON [AV-29VT35/R]

OFF TIMER OFF

CLOSED CAPTION OFF

CHANNEL POSITION CH02

Table 2

 SETTING OF MENU SCREEN

Setting item Setting value

INPUT TV

VNR AUTO

COMPRESS (16:9) OFF

PICTURE TILT

AUTO SHUTOFF OFF

CHILD LOCK OFF

BLUE BACK ON

VIDEO-2 SET VIDEO

AUTO PROGRAM

CHANNEL SUMMARY

WHITE BALANCE COOL

TINT Center

COLOR Center

BRIGHT Center

PICTURE Maximum

DETAIL Center

BALANCE Center

SOUND MODE DYNAMIC

SOUND TURBO OFF

AI VOLUME ON

MTS STEREO

FAVORITE CH RED CH02

FAVORITE CH GREEN CH03

FAVORITE CH YELLOW CH04

FAVORITE CH BLUE CH05

AI ECO SENSOR OFF

AI ECO DISPLAY ON

Refer to OPERATING INSTRUCTIONS

 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. COLOR(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

3. AUDIO [Do not adjust]

4. DEF 1. V-SHIFT

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

(COOL/WARM/NORMAL)

6. STATUS [Display only]

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

1. DCXO ADJ

2. NICAM lower ERRLIM

3. NICAM upper ERRLIM

4. A2 ID THR

5. MENU EQUALIZER

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

1. BRIGHT

2. CONT

3. COLOR

4. SHARP

5. HUE

1. R DRIVE

2. G DRIVE

3. B DRIVE

Table 4

1-12 (No.YA256)

Table 3

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.

(4) Then solder leads B and C.

(No.YA256)1-13

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

TINT, COLOR, BRIGHT,DETAIL Center

PICTURE Maximum

VNR OFF

AI ECO SENSOR OFF

BALANCE Center

SOUND TURBO OFF

CINEMA SURROUND OFF

COMPRESS 4:3

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 COLOR 1 adjustment

• SUB COLOR 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.S-CURVE adjustment

• CORNER adjustment

• H. PARALLEL adjustment

• H.BOW adjustment

 VSM PRESET SETTING  CONVERGENCE ADJUSTMENTS

• STATIC CONVERGENCE adjustment

• DYNAMIC CONVERGENCE adjustment

1-14 (No.YA256)

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)

S805

S804

IC702

I2C

CN00C

1. 5V

2. SCL0

3. SDA0

4. SCL1

5. SDA1

6. GND

GND 5V

S806 S802

CN002

S803S801

J804 J803 J802

CN002

CN00S

FRONT

J801

FRONT

DEF YOKE

SPEAKER (R)

CRT EARTH

(BRAIDED ASS'Y)

J804J801J805 J802 J803

TU001

CRT SOCKET PWB ASS’Y

TP-47R

TP-47G

CRT EARTH

(BRAIDED ASS'Y)

GND B1

CN00X

1. B1

2. NC

3. X-RAY2

4. X-RAY1

5. GND

TP-47B

HVT

UPPER : FOCUS

LOWER : SCREEN

(SOLDER SIDE)

TOP

TP-E

(No.YA256)1-15

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.YA256)

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

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

11. AMP T.SHARP

*****

MHz

6. STATUS

STATUS

V/C STATUS

ECO EOF NOL VNR

***********

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 DYNAMIC MUSIC NEWS USER

4 : 3 / 16 : 9

Setting item

1. V-SHIFT

2. V-SLOPE

3. V-SIZE

4. H-CENT

5. H-SIZE

6. TRAPEZ

7. EW-PIN

8. COR-UP

Setting value (Hexadecimal)

Setting value

Sereen size

FULL COMPRESS

9. COR-LO

10. ANGLE

11. BOW

12. V-S. CR

13. V-LIN

14. V-ZOOM

15. V-SCROLL

Fig.1

(No.YA256)1-17

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 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 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

NTSC 3.58

VHF UHF

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 broadcast signal.

Receiving frequency

(2) Select 1. IF from the SERVICE MENU. (3) Select 1. VCO. (4) Check the characters color of the JUST

REFERENCE displayed to yellow.

YELLOW

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

normal screen.

[1. IF]

2. DELAY POINT

(1) Receive a black and white broadcast signal (color 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

OTHERS

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.

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

no irregularities.

1-18 (No.YA256)

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.

Initial setting value

Adjustment item Variable range

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

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

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

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

5. CONT. RF 0 ~ 63 32 32 32 --- --VIDEO (-32 ~ +31) (+2) (+2) (+2) (+2) (+2) RF 16:9 (-32 ~ +31) (0) (0) (0) --- --VIDEO 16:9 (-32 ~ +31) --- --- --- --- ---

6. COLOR RF 0 ~ 63 (-32 ~ +31) 42 32 37 --- --VIDEO 0 ~ 63 (-32 ~ +31) (+1) (+4) (-3) (+7) (+2)

7. TINT RF 0 ~ 63 (-32 ~ +31) --- --- 27 --- --VIDEO (-32 ~ +31) --- --- (+1) --- ---

8. SHARP RF 0 ~ 63 28 28 28 --- --VIDEO 0 ~ 63 40 40 40 15 15

9. Y DELAY RF 0 ~ 15 11 11 14 --- --VIDEO 0 ~ 15 997-----S-VIDEO 0 ~ 15 9 10 11 --- ---

10. TINT DVD VIDEO, S-VIDEO 0 ~ 63 34 36 32 --- --COMPONENT (-32 ~ +31) --- --- --- (0) (-2)

11. AMP T.SHARPRF, VIDEO 0 ~ 63 00000

PAL SECAM

NTSC3.58

COMPONENT (V-2)

525i 625i

Item

WHITE BALANCE (Low light) adjustment

Measuring instrument

Signal generator

Remote control unit

B CUTOFF (

Test point Adjustment part Description

V/C

2. CUTOFF

REMOTE CONTROL UNIT

12 3

)



789



)

PAL

(B)

(G)

[2. V/C]

2. CUTOFF (B)

2. CUTOFF (G)

SCREEN VR [In HVT]

(**)

)

(

G CUTOFF ( )



G CUTOFF (

)

Note:

• Set PICTURE MODE (VSM) to "BRIGHT".

- COMPOSITE WHITE BALANCE -

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

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

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

the other 2 colors 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

(color off).

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

VIDEO-2 SET to COMPONENT.

(3) Adjust COMPONENT WHITE BALANCE in the

same way as ”COMPOSITE WHITE BALANCE”.

Adjustment Item

2. CUT OFF

B 0 ~ 63(-32~+31)

G (-5)

Variable

range

0 ~ 63(-32~+31)

Initial setting value

COMPOSITE COMPONENT

(-3)

(No.YA256)1-19

Item

WHITE BALANCE (High light) adjustment

Measuring

instrument

Signal generator

Remote control unit

Test point Adjustment part Description

[2. V/C]

3. WDR (R)

3. WDR (G)

3. WDR (B)

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 (color off). (2) Select 2. V/C from the SERVICE MENU. (3) Select 3. WDR (R), (G) and (B).

V/C

3. WDR

PAL

(R)

(G) (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.

SUB BRIGHT adjustment

SUB CONTRAST adjustment

REMOTE CONTROL UNIT

12 3

R DRIVE (

) B DRIVE ()





R DRIVE (

)

789

Remote control unit

G DRIVE ()



B DRIVE (

)



G DRIVE (

)

[2. V/C]

4. BRIGHT

[2. V/C]

5. CONT

Adjustment Item

3. WDR G 32

Variable Initial setting

range value

R32

0 ~ 63

B45

0 ~ 63

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 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.

Notes:

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

• Set PICTURE MODE (VSM) to "BRIGHT".

(1) Receive a 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.

1-20 (No.YA256)

Item

SUB COLOR 1 adjustment

Measuring instrument

Remote control unit

Test point Adjustment part Description

[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-M COLOR -

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

adjust until you get the best color.

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

normal screen.

- PAL-N COLOR -

(1) Receive a PAL-N broadcast. (2) Press the [COLOR SYSTEM] key to select the PAL-

N color system.

(3) Adjust PAL-N COLOR in the same way as for "PAL-

M COLOR".

- SECAM COLOR -

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

SECAM color system.

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

"PAL-M COLOR".

- NTSC 3.58 COLOR -

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

NTSC 3.58 color system.

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

"PAL-M COLOR".

(No.YA256)1-21

Item

SUB COLOR 2 adjustment

SUB TINT 1 adjustment

Measuring

instrument

Signal generator

Oscilloscope

Remote control unit

Signal generator

Remote control unit

Test point Adjustment part Description

TP-47G 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-M COLOR -

(1) Receive a PAL-M color bar signal (full field color bar

75% white). (2) Select 2. V/C from the SERVICE MENU. (3) Select 6. COLOUR.

(A)

(–) 0V (+)

(4) Set the initial setting value of PAL-M COLOR. (5) Connect the oscilloscope between TP-47G and TP-E. (6) Adjust PAL-M COLOR to set the value (A) in the

figure to +10V.

- PAL-N COLOR -

(1) Receive a PAL-N color bar signal (full field color bar

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

to +8V.

- SECAM COLOR -

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

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

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

figure to ---.

- NTSC 3.58 COLOR -

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

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

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

figure to +6V.

[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".

- NTSC 3.58 TINT -

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

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

NTSC 3.58 color 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.

1-22 (No.YA256)

Item

SUB TINT 2 adjustment

Measuring instrument

Signal generator

Oscilloscope

Remote control unit

Test point Adjustment part Description

TP-47G 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 color bar signal (full field color

bar 75% white).

(2) Press the [COLOR SYSTEM] key to select the

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

figure to +5V.

(B)

(–) 0V (+)

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

normal screen.

4.7.5 AUDIO SETTING

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

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

MENU EQUALIZER DYNAMIC +9 +5 -2 +5 +10

MUSIC +1+2+6+5+6 NEWS -6 +1 +6 +1 -6 USER 00000

(No.YA256)1-23

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

Variable range Initial setting value

Adjustment item

4:3

50Hz

Others

50Hz 60Hz 50Hz 60Hz

4:3 COMPRESS (16:9)

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) 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.

 COMPRESS: OFF (4:3)

Item

V. SLOPE adjustment

Measuring

instrument

Signal generator

Test point Adjustment part Description

[4. DEF]

2. V-SLOPE

- PAL V. SLOPE -

(1) Receive a PAL circle pattern signal of vertical

frequency 50Hz. Remote control unit

(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".

V. POSITION adjustment

1-24 (No.YA256)

Signal generator

Remote control unit

[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".

Item

V. HEIGHT adjustment

Screen

size

92%

Measuring instrument

Signal generator

Remote control unit

Test point Adjustment part Description

[4. DEF]

3. V-SIZE

14. V-ZOOM

- 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) Select 14. V-ZOOM. (5) Set the initial setting value of 14. V-ZOOM. (6) Adjust 14. V-ZOOM to make the vertical screen size

to 92% of the picture size.

Picture size 100%

- 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".

H. POSITION adjustment

H. WIDTH adjustment

Signal generator

[4. DEF]

4. H-CENT

Remote control unit

Signal generator

[4.DEF]

5. H-SIZE

Remote control unit

Screen size 91%

- 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".

- 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

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%

(No.YA256)1-25

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

V.LINEARITY adjustment

Signal generator

Remote control unit

Signal generator

Remote control unit

Parallel

[4.DEF]

6. TRAPEZ

[4. DEF]

12. V-S. CR

13. V-LIN

TOP

CENTER

- 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".

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

of each line on TOP, CENTER and BOTTOM

become uniform.

- NTSC V. LINEARITY -

(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".

1-26 (No.YA256)

BOTTOM

Item

CORNER PIN adjustment

Measuring instrument

Signal generator

Remote control unit

Test point Adjustment part Description

[4. DEF]

8. COR-UP

9. COR-LO

- 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.

Straigt

(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".

H. PARALLEL adjustment

H. BOW adjustment

Signal generator

Remote control unit

Signal generator

Remote control unit

Parallel

Straight

[4.DEF]

10. ANGLE

[4.DEF]

11. BOW

- 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 center 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".

- 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.

- 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.

(No.YA256)1-27

 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]

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

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 to return to SERVICE

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".

1-28 (No.YA256)

+ 64 hidden pages