SERVICE MANUAL FLAT COLOR TELEVISION YA140 2004 AV-21VT14 AV-21VT34 BASIC CHASSIS TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
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7/23/2017 SPECIFICATION Contents Items AV-21VT14/P AV-21VT34/P Dimensions (W × H × D) 64.9cm × 46.55cm × 47.35cm 64.9cm × 47.8cm × 47.35cm Mass 24kg 26.4kg TV RF System Color System TV Mode NTSC3.58 Video Mode PAL / SECAM / NTSC3.58 / NTSC4.43...
www.freeservicemanuals.info 7/23/2017 SECTION 1 PRECAUTION 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.
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 +. MAIN DIFFERENCE LIST Items AV-21VT14/P AV-21VT34/P BASS BLASTER None BASS BLASTER UNIT...
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www.freeservicemanuals.info 7/23/2017 FUNCTIONS REMOTE CONTROL UNIT RM-C1282-2H COLOR SYSTEM key ECO key FAVORITE CHANNEL keys POWER key DISPLAY BACK key TV / VIDEO key MENU ( / , / ) keys MENU (OK) key CLOSED CAPTION key MUTING key SOUND TURBO key Number keys 100+ key PICTURE MODE key...
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7/23/2017 REAR TERMINAL [AV-21VT14/P] VIDEO-1 INPUT TERMINAL S-VIDEO 10 11 VIDEO AUDIO L/MONO AUDIO R COMPONENT VIDEO-1 (VIDEO-2) OUTPUT INPUT INPUT COMPONENT (VIDEO-2) INPUT TERMINAL Y/VIDEO OVER AUDIO L/MONO / MONO AUDIO R MONO OUTPUT TERMINAL VIDEO AUDIO L...
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www.freeservicemanuals.info 7/23/2017 MAIN CPU [MAIN PWB : IC701] PIN FUNCTION Pin no. Pin name Remark Pin no. Pin name Remark CVBSO/PIP O CVBS / PIP output VssP2 O Scan velocity modulation output VssC4 FbiSo Flyback input/sandcastle output V1.8C4 1.8V (Digital) Hout O Horizontal output V3.3A3...
www.freeservicemanuals.info 7/23/2017 SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE 3.1.1 REMOVING THE TWIN PORT BASS BLASTER UNIT [AV-21VT34/P] • 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.
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www.freeservicemanuals.info 7/23/2017 FRONT CABINET PICTURE TUBE (x2) SPEAKER MAIN PWB (CRT SOCKET PWB) MAIN PWB (x2) SPEAKER BASS SPEAKER OUT JACK [AV-21VT34/P] TWIN PORT BASS BLASTER UNIT [AV-21VT34/P] (x9) REAR COVER (x4) Fig.1 (No.YA140)1-9 Digitized in Heiloo Netherland...
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www.freeservicemanuals.info 7/23/2017 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 and deflection circuits. When replacing the memory IC, be sure SERVICE MENU to use the same type IC written with the initial values of data.
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7/23/2017 3.2.3 FACTORY SETTING VALUE SETTING OF SYSTEM CONSTANT SET Setting value Setting item Setting content AV-21VT14/P AV-21VT34/P TAIWAN OTHERS SYSTEM OTHERS COMB TILT SUPER BASS STEREO MONO SOUND STEREO BLUE BACK MUTE ECO SENSOR SURROUND PICTURE BOOSTER COMPONENT...
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www.freeservicemanuals.info 7/23/2017 SETTING OF BASIC FUNCTIONS SERVICE MENU SETTING ITEMS Setting item Setting value Setting item Setting value POWER 1. IF 1. VCO 2. DELAY POINT SUB POWER 2. V/C 1. SCREEN VOLUME 2. CUTOFF(B/G) COLOR SYSTEM NTSC 3. WDR(R/G/B) 4.
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www.freeservicemanuals.info 7/23/2017 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.
www.freeservicemanuals.info 7/23/2017 SECTION 4 ADJUSTMENT 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.
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www.freeservicemanuals.info 7/23/2017 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.
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www.freeservicemanuals.info 7/23/2017 4.6.3 SERVICE MENU FLOW CHART 1. IF SERVICE MENU SERVICE MENU IF SERVICE MENU 1. IF 2. V/C VCO (CW) ***** 3. AUDIO 4. DEF TOO HIGH 5. VSM W/B 6. STATUS 1. VCO ABOVE REFERENCE 7. PLUG & PLAY (ON) JUST REFERENCE 2.
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www.freeservicemanuals.info 7/23/2017 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).
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www.freeservicemanuals.info 7/23/2017 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. •...
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www.freeservicemanuals.info 7/23/2017 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.
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www.freeservicemanuals.info 7/23/2017 Measuring Item Test point Adjustment part Description instrument SUB COLOR 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. •...
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- NTSC 4.43 TINT - When adjustment is done for NTSC 3.58 TINT, appropriate values are automatically set for NTSC 4.43 TINT. 4.7.5 AUDIO SETTING This submenu is for display only, no adjustment is required. [AV-21VT14/P] Function Item 100Hz 300Hz...
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www.freeservicemanuals.info 7/23/2017 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. •...
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www.freeservicemanuals.info 7/23/2017 Measuring Item Test point Adjustment part Description instrument V. HEIGHT Signal [4. DEF] - PAL V. HEIGHT - adjustment generator 3. V-SIZE (1) Receive a PAL crosshatch signal. 14. V-ZOOM (2) Select 3. V-SIZE. Remote (3) Set the initial setting value of 3. V-SIZE. control unit (4) Select 14.
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www.freeservicemanuals.info 7/23/2017 Measuring Item Test point Adjustment part Description instrument H. PARALLEL Signal [4.DEF] - PAL H. PARALLEL - adjustment generator 10. ANGLE (1) Receive a PAL crosshatch signal. (2) Select 10. ANGLE. Remote (3) Set the initial setting value of 10. ANGLE. control unit (4) Adjust 10.
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www.freeservicemanuals.info 7/23/2017 COMPRESS : ON (16:9) Measuring Item Test point Adjustment part Description instrument V. HEIGHT Signal [4.DEF] - PAL V. HEIGHT - adjustment generator 14. V. ZOOM (1) Receive a PAL crosshatch signal of vertical 3. V-SIZE frequency 50Hz. Remote (2) Press the [MENU] key and select PICTURE.
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www.freeservicemanuals.info 7/23/2017 VIDEO - 2 SET: COMPONENT Measuring Item Test point Adjustment part Description instrument H. POSITION Signal [4. DEF] (1) Receive a PAL circle pattern signal to VIDEO-2 adjustment generator 4. H-CENT component terminal. (2) Select VIDEO-2 SET from the MENU and set Remote VIDEO-2 SET to COMPONENT.
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www.freeservicemanuals.info 7/23/2017 4.7.8 PURITY AND CONVERGENCE PURITY ADJUSTMENT Note: The final adjustment of CONVERGENCE must be done after WEDGE DEFLECTION the FOCUS adjustment. (CONVERGENCE is changed by YOKE FOCUS adjustment.) When makes difference by FOCUS adjustment, should be reconfirming PURITY adjustment. (1) Demagnetize CRT with the demagnetizer.
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www.freeservicemanuals.info 7/23/2017 STATIC CONVERGENCE ADJUSTMENT (1) Input a crosshatch signal. (2) Using 4-pole convergence magnets, overlap the red and blue lines in the center of the screen (Fig.1) and turn them (FRONT VIEW) to magenta (red/blue). (3) Using 6-pole convergence magnets, overlap the magenta (red/blue) and green lines in the center of the screen and turn them to white.
www.freeservicemanuals.info 7/23/2017 SECTION 5 TROUBLESHOOTING 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.
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www.freeservicemanuals.info 7/23/2017 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan (No.YA140) Printed in Japan Digitized in Heiloo Netherland...
www.freeservicemanuals.info 7/23/2017 PARTS LIST CAUTION The parts identified by the symbol are important for the safety . Whenever replacing these parts, be sure to use specified ones to secure the safety. The parts not indicated in this Parts List and those which are filled with lines --- in the Parts No. columns will not be supplied. P.W.
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EXPLODED VIEW -2 ..............................3-5 EXPLODED VIEW PARTS LIST -3 [AV-21VT34/P] ....................3-6 EXPLODED VIEW -3 ..............................3-6 PRINTED WIRING BOARD PARTS LIST [AV-21VT14/P] ..................3-7 MAIN P.W. BOARD ASS'Y (SCW-1039A-H2) ....................3-7 PRINTED WIRING BOARD PARTS LIST [AV-21VT34/P] ..................3-11 MAIN P.W.
7/23/2017 USING P.W. BOARD & REMOTE CONTROL UNIT P.W.B ASS'Y AV-21VT14/P AV-21VT34/P MAIN P.W.B SCW-1039A-H2 SCW-1038A-H2 ← REMOTE CONTROL UNIT RM-C1282-2H EXPLODED VIEW PARTS LIST -1 Ref.No. Part No. Part Name Description Local GG30068-001A-H AV SHEET GG40023-003A-H JVC MARK...
www.freeservicemanuals.info 7/23/2017 EXPLODED VIEW -2 FRONT CABINET DY01 MAIN PWB (CRT SOCKET PWB) T522 MAIN PWB BASS SPEAKER OUT JACK [AV-21VT34/P] TWIN PORT BASS BLASTER UNIT [AV-21VT34/P] (No.YA140)3-5 Digitized in Heiloo Netherland...
www.freeservicemanuals.info 7/23/2017 EXPLODED VIEW PARTS LIST -3 [AV-21VT34/P] Ref.No. Part No. Part Name Description Local LC40352-001A-H RUBBER SHEET (x4) QYSBSFG4016ZA TAP SCREW M4 x 16mm(x13) GG10141-001C-H BASS BOTTOM LC41211-001A SOUND ABSORBER QYSBSFG4016ZA TAP SCREW M4 x 16mm(x4) QAS0118-001 SPEAKER SP03 WJJ0266-002A E-SIC WIRE C-C...
7/23/2017 PRINTED WIRING BOARD PARTS LIST [AV-21VT14/P] MAIN P.W. BOARD ASS'Y (SCW-1039A-H2) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local D712 MA8051/M/-X Z DIODE D713 MA8039/H/-X Z DIODE IC302 S9066-11 PHOTO CONDUCTOR...
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www.freeservicemanuals.info 7/23/2017 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C529 QETN2EM-475Z E CAPACITOR 4.7uF 250V M C762 QETN1CM-107Z E CAPACITOR 100uF 16V M C530 QCB32HK-561Z C CAPACITOR 560pF 500V K C763 NCB31CK-224X C CAPACITOR 0.22uF 16V K...
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www.freeservicemanuals.info 7/23/2017 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R101 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J R634 NRSA63J-271X MG RESISTOR 270Ω 1/16W J R102 NRSA63J-822X MG RESISTOR 8.2kΩ 1/16W J R636 NRSA63J-271X MG RESISTOR 270Ω...
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www.freeservicemanuals.info 7/23/2017 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R809 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J J804 QNN0349-001 PIN JACK VIDEO OUT R810 NRSA63J-391X MG RESISTOR 390Ω 1/16W J J806 QNN0281-003 PIN JACK VIDEO3(FRONT)/L3 R811...
www.freeservicemanuals.info 7/23/2017 PRINTED WIRING BOARD PARTS LIST [AV-21VT34/P] MAIN P.W. BOARD ASS'Y (SCW-1038A-H2) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local D701 MA111-X SI DIODE D702 MA8091/H/-X Z DIODE IC302 S9066-11 PHOTO CONDUCTOR D704 MA8091/H/-X Z DIODE...
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www.freeservicemanuals.info 7/23/2017 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C520 NCB31HK-104X C CAPACITOR 0.1uF 50V K C742 QETN1HM-106Z E CAPACITOR 10uF 50V M C521 QCB31HK-332Z C CAPACITOR 3300pF 50V K C743 QETN1HM-106Z E CAPACITOR 10uF 50V M...
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www.freeservicemanuals.info 7/23/2017 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C978 QETN1CM-476Z E CAPACITOR 47uF 16V M R602 NRSA63J-272X MG RESISTOR 2.7kΩ 1/16W J C979 QETN1EM-107Z E CAPACITOR 100uF 25V M R603 MA111-X SI DIODE C980...
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www.freeservicemanuals.info 7/23/2017 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R751 NRSA63J-102X MG RESISTOR 1kΩ 1/16W J L002 QQL244J-4R7Z PEAKING COIL 4.7uH J R752 NRSA63J-101X MG RESISTOR 100Ω 1/16W J L003 QQL244J-4R7Z PEAKING COIL 4.7uH J R753...
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7/23/2017 AV-21VT14 AV-21VT34 STANDARD CIRCUIT DIAGRAM NOTE ON USING CIRCUIT DIAGRAMS 1.SAFETY Type No indication : Ceramic capacitor The components identified by the symbol and shading are : Metalized mylar capacitor critical for safety. For continued safety replace safety ciritical : Polypropylene capacitor components only with manufactures recommended parts.
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SEMICONDUCTOR SHAPES ................ USING P.W.BOARD..................BLOCK DIAGRAM ..................CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM [AV-21VT14/P] (1/3) ................2-5 MAIN PWB CIRCUIT DIAGRAM [AV-21VT14/P] (2/3),(3/3) ................ 2-7 MAIN PWB CIRCUIT DIAGRAM [AV-21VT34/P] (1/3) ................2-9 MAIN PWB CIRCUIT DIAGRAM [AV-21VT34/P] (2/3),(3/3) ............... 2-11 PATTERN DIAGRAMS MAIN PWB PATTERN ..........................
www.freeservicemanuals.info 7/23/2017 BLOCK DIAGRAM MAIN PWB IC701 MAIN MICRO COMPUTER/ IF VIDEO RGB SYNC DEF. PROCESS IC351 108,109 SCL1, SDA1 RGB OUT I 2 C IC702 127,128 SCL0, SDA0 MICRO MAIN MEMORY DIGITAL SIGNAL PROCESS COMPUTER TU001 98,99 TUNER REMOTE PORT KEY_IN CRT SOCKET...
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www.freeservicemanuals.info 7/23/2017 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan (No.YA140) Printed in Japan Digitized in Heiloo Netherland...