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SERVICE MANUAL
FLAT COLOUR TELEVISION
9 200 YA139 4
AV-29V514/B
BASIC CHASSIS
CW
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SPECIFICATION Items Contents Dimensions (W × H × D) 81.2cm × 58.4cm × 52.0cm Mass 41kg TV RF System B, G, I, D, K, M Colour System TV Mode PAL / SECAM / NTSC3.58 / NTSC4.43 Video Mode PAL / SECAM / NTSC3.58 / NTSC4.43 Stereo System A2 (B / G) / NICAM (B / G, I, D / K) Receiving Frequency VHF Low 46.25MHz ~ 168.25MHz (AU0 ~ S10) VHF High 175.25MHz ~ 463.25MHz (E5 ~ S41) UHF 471.25MHz ~ 863.25MHz (E21 ~ CHINA 57) CATV Mid : X ~ Z, S1 ~ S10 Super: S11 ~ S20 Hyper: S21 ~ S41 Intermediate VIF 38.0MH
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SECTION 1 PRECAUTION 1.1 SAFETY PRECAUTIONS (1) The design of this product contains special hardware, (8) When service is required, observe the original lead dress. many circuits and components specially for safety Extra precaution should be given to assure correct lead purposes. For continued protection, no changes should be dress in the high voltage circuit area. Where a short circuit made to the original design unless authorized in writing by has occurred, those components that indicate evide
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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. 2 •I C bus control utilizes single chip ICs. • 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
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FRONT PANEL CONTROLS VR L/MONO POWER MENU CHANNEL VOLUME TV/VIDEO OK EXIT IN (VIDEO-3) 1 2 3 4 5 6 7 8 9 10 11 12 1 HEADPHONE jack 7 VOLUME (-/+) buttons IN (VIDEO-3) : VIDEO 8 TV/VIDEO EXIT buttons 2 IN (VIDEO-3) : AUDIO L/MONO 9 Remote control sensor 3 IN (VIDEO-3) : AUDIO R 10 ECO sensor 4 MENU (OK) button 11 POWER lamp 5 6 CHANNEL (-/+) buttons 12 MAIN POWER button REAR TERMINAL VIDEO-1 INPUT TERMINAL 1 S-VIDEO 1 5 6 8 10 11 VIDEO 2 3 AUDIO L/MONO 4 AUDIO R COMPONENT VIDEO-1 (VIDEO-2) OUT
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2.3 MAIN CPU [MAIN PWB : IC701] PIN FUNCTION Pin no. Pin name I/O Remark Pin no. Pin name I/O Remark 64 CVBSO/PIP O CVBS / PIP output 1 VssP2 - GND 65 SVM O Scan velocity modulation output 2 VssC4 - GND 66 FbiSo I Flyback input/sandcastle output 3 V1.8C4 I 1.8V (Digital) 67 Hout O Horizontal output 4 V3.3A3 I 3.3V 68 VssComb - GND 5 VrefP_Sdac I 3.3V (Positive) 69 V5Comb I 5V 6 VrefN_Sdac - GND 70 Vin/R2/Pr I PIP R input 7 VrefP_Sdac I 3.3V (Negative) 71 Uin/B2/Pb I PIP B input 8 VrefN_Sdac -
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SECTION 3 DISASSEMBLY 3.1 DISASSEMBLY PROCEDURE 3.1.1 REMOVING THE REAR COVER 3.1.5 REMOVING THE SPEAKER • Unplug the power cord. • Remove the REAR COVER. (1) Remove the 16 screws [A] as shown in Fig.1. (1) Remove the 2 screws [G] as shown in Fig.1. (2) Withdraw the REAR COVER toward you. (2) Withdraw the SPEAKER backward. (3) Follow the same steps when removing the other hand CAUTION: SPEAKER. When reinstalling the rear cover, carefully push it inward after inserting the MAIN PWB into the REAR
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[FRONT SIDE] CONTROL BASE E F FRONT CABINET (X2) CHASSIS G PICTURE TUBE BASE SPEAKER Fig.2 FRONT CONTROL PWB (2/2) CRT SOCKET PWB CLAW B (under side) FRONT CONTROL MAIN PWB PWB (1/2) FBT SPEAKER Fig.2 AV TERMINAL BOARD G (X2) CONTROL BASE CHASSIS BASE D CLAW B (under side) C (×4) REAR COVER A (×16) Fig.1 1-8 (No.YA139)
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3.2 REPLACEMENT OF MEMORY IC 3.2.1 MEMORY IC This TV uses the following memory IC. SERVICE MENU Memory IC: IC702 on MAIN PWB The memory IC memorizes data for correctly operating the video SERVICE MENU and deflection circuits. When replacing the memory IC, be sure 1. IF 2. V/C to use the same type IC written with the initial values of data. In 3. AUDIO 4. DEF other words, use the specific IC listed in "PRINTED WIRING 5. VSM W/B 6. S TATUS 7. PLUG & PLAY (ON) BOARD PARTS LIST". For its mounting lo
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3.2.3 FACTORY SETTING VALUE SETTING OF SYSTEM CONSTANT SET Setting item Setting content Setting value MULTI TRIPLE PAL THAI SYSTEM MULTI YES NO COMB YES YES NO TILT YES YES NO NO SUPER BASS SINGLE NO PAT TEXT NO E/T LANGUAGE E/T STEREO PB MONO SOUND STEREO YES NO BILINGUAL NO YES NO BLUE BACK MUTE NO YES NO COLOUR AUTO NO YES NO ECO SENSOR YES YES NO SURROUND YES YES NO PICTURE BOOSTER NO YES NO
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SETTING OF BASIC FUNCTIONS SERVICE MENU SETTING ITEMS Setting item Setting value Setting item Setting value POWER Off 1. IF 1. VCO 2. DELAY POINT SUB POWER On 2. V/C 1. SCREEN VOLUME 15 2. CUTOFF(B/G) COLOR SYSTEM PAL 3. WDR(R/G/B) 4. BRIGHT(TV/VDO 1/2/3) SOUND SYSTEM B/G 5. CONT(TV/VDO 1/2/3/TV 16:9/VDO 16:9) PICTURE MODE (VSM) BRIGHT 6. COLOUR(TV/VDO1/2/3/DVD) CINEMA SURROUND OFF 7. TINT(TV/VDO 1/2/3) 8. SHARP [Do not adjust] OFF TIMER OFF 9. Y DELAY [Do not adjust] STEREO MODE STEREO 10. TI
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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 insta
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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
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4.5 ADJUSTMENT LOCATIONS FRONT CONTROL PWB ASS’Y (1/2) FRONT CONTROL PWB ASS’Y (2/2) SPEAKER (L) SPEAKER (R) FRONT FRONT S805 S801 S803 J804 J803 J802 J801 S804 S806 S802 S901 W ROTATION COIL CN00S CNDEG R CN002 CN001 PW POWER CORD DEG COIL MAIN PWB ASS’Y FRONT CN001 CN00W CN002 IC702 T 1 8 2 I C CN00C IC701 1. 5V 2. SCL0 3. SDA0 4. SCL1 5. SDA1 DEF YOKE 6. GND HV GND 5V 6 1 6 1 61 HVT U GND B1 J805 J801 J802 J803 J804 5 1 CN00X TU001 UPPER : FOCUS 1. B1 2. NC LOWER : SCREEN 3. X-RAY2 4. X-RAY1
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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)
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4.6.3 SERVICE MENU FLOW CHART 1. IF SERVICE MENU SERVICE MENU IF SERVICE MENU 1. IF 2. V/C VCO (CW) MHz ***** 3. AUDIO 4. DEF TOO HIGH 5. VSM W/B 6. STATUS 1. VCO ABOVE REFERENCE 7. PLUG & PLAY (ON) JUST REFERENCE 2. DELAY POINT BELOW REFERENCE 1-7 : SELECT DISPLAY : EXIT TOO LOW ******* **** ***** ***** **** **** *** *** DELAY POINT AGC TAKEOVER ** 2. V/C Setting item 1. SCREEN 8. SHARP (TV/VDO1/2/3) V/C PAL 2. CUTOFF (B/G) 9. Y DELAY (TV/VDO1/2/3 1. SCREEN HBC 3. WDR (R/G/B) /S
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4.7 ADJUSTMENT PROCEDURE 4.7.1 B1 VOLTAGE Measuring Item Test point Adjustment part Description instrument B1 VOLTAGE Signal B1 (pin 1) (1) Receive a black and white signal. check generator GND (pin 5) (2) Connect a DC voltmeter between B1 and GND [CN00X (between pins 1 and 5 of the connector CN00X). DC voltmeter connector in (3) Make sure that the voltage is DC134.5V ± 2V. MAIN PWB] 4.7.2 FOCUS ADJUSTMENT Measuring Item Test point Adjustment part Description instrument FOCUS Signal FOCUS VR N
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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 v
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Measuring Item Test point Adjustment part Description instrument WHITE Signal [2. V/C] Notes: BALANCE generator 3. WDR (R) • Proceed to the following adjustment after having (High light) 3. WDR (G) completed the WHITE BALANCE (Low light) adjustment. adjustment Remote 3. WDR (B) • Set PICTURE MODE (VSM) to "BRIGHT". control unit (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
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Measuring Item Test point Adjustment part Description instrument SUB COLOUR 1 Remote [2. V/C] [Method of adjustment without measuring instrument] adjustment control unit 6. COLOUR 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 b
