JVC AV-14F703 Service Manual
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JVC AV-14F703 Service Manual

JVC AV-14F703 Service Manual

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SERVICE MANUAL
CONTENTS
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SPECIFICATIONS ....................................................................................................................................2
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OPERATING INSTRUCTIONS (APPENDIX)
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SAFETY PRECAUTIONS ........................................................................................................................3
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SPECIFIC SERVICE INSTRUCTIONS ....................................................................................................4
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SERVICE ADJUSTMENTS ......................................................................................................................9
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GUIDE FOR REPAIRING .......................................................................................................................14
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STANDARD CIRCUIT DIAGRAM ........................................................................................................ 2-1
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PARTS LIST ...........................................................................................................................................21
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
COLOR TELEVISION
AV-14F703
AV-14F703
No. 52002
Apr. 2002

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  • Page 1 AV-14F703 SERVICE MANUAL COLOR TELEVISION AV-14F703 CONTENTS SPECIFICATIONS ............................2 OPERATING INSTRUCTIONS (APPENDIX) SAFETY PRECAUTIONS ........................3 SPECIFIC SERVICE INSTRUCTIONS ....................4 SERVICE ADJUSTMENTS ........................9 GUIDE FOR REPAIRING ........................14 STANDARD CIRCUIT DIAGRAM ......................2-1 PARTS LIST ............................21 No. 52002 COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
  • Page 2 AV-14F703 SPECIFICATIONS TELEVISION Picture Tube: 14” (measured diagonally) Color System: NTSC TV RF System: CCIR (M) Tuner Type: 181 Channel, Quartz PLL Frequency Synthesized Receiving Channels: 2-13 14-69 CATV 01-97 (5A)-(A-3) 98-99 (A-2)-(A-1) 14-22 (A)-(I) 23-36 (J)-(W) 37-65 (AA)-(FFF) 66-125 (GGG)-(125) Intermediate Frequency: Picture (FP) : 45.75 MHz...
  • Page 3 AV-14F703 SAFETY PRECAUTIONS SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES 6. AVOID AN X-RAY As for the places which need special attentions, Safety is secured against an X-ray by consider- they are indicated with the labels or seals on the ing about the cathode-ray tube and the high cabinet, chassis and parts.
  • Page 4 AV-14F703 SPECIFIC SERVICE INSTRUCTIONS DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF ANODE CAP 3. After one side is removed, pull in the opposite direction to remove the other. Read the following NOTED items before starting work. NOTE After turning the power off there might still be a potential Take care not to damage the Rubber Cap.
  • Page 5 AV-14F703 DISASSEMBLY INSTRUCTIONS 3. When IC starts moving back and forth easily after 2. REMOVAL AND INSTALLATION OF FLAT desoldering completely, pickup the corner of the IC using PACKAGE IC a tweezers and remove the IC by moving with the IC REMOVAL desoldering machine.
  • Page 6 AV-14F703 DISASSEMBLY INSTRUCTIONS INSTALLATION 4. When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thin- 1. Take care of the polarity of new IC and then install the tip Soldering Iron. (Refer to Fig. 2-8.) new IC fitting on the printed circuit pattern.
  • Page 7 AV-14F703 SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter the Service Mode, press both set key and remote control key for more than 1 second. Set Key...
  • Page 8 AV-14F703 WHEN REPLACING EEPROM (MEMORY) IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. Table 1 Enter DATA SET mode by setting VOLUME to minimum.
  • Page 9 AV-14F703 SERVICE ADJUSTMENTS ELECTRICAL ADJUSTMENTS 1. ADJUSTMENT PROCEDURE 2. BASIC ADJUSTMENTS Read and perform these adjustments when repairing the circuits 2-1: CONSTANT VOLTAGE or replacing electrical parts or PCB assemblies. Set condition is AV MODE without signal. CAUTION Connect the digital voltmeter to the TP002.
  • Page 10 AV-14F703 ELECTRICAL ADJUSTMENTS 2-6: HORIZONTAL POSITION 2-11: TINT/COLOR CENT Receive the monoscope pattern. Receive the color bar pattern. (RF Input) Using the remote control, set the brightness and contrast Connect the oscilloscope to TP806. to normal position. Using the remote control, set the brightness, contrast, Activate the adjustment mode display of Fig.
  • Page 11 AV-14F703 ELECTRICAL ADJUSTMENTS 2-12: CONTRAST MAX MANUAL 2-14: OSD HORIZONTAL Activate the adjustment mode display of Fig. 1-1 and Activate the adjustment mode display of Fig. 1-1. press the channel button (18) on the remote control to Press the VOL. UP/DOWN button on the remote control select “CONT.
  • Page 12 AV-14F703 ELECTRICAL ADJUSTMENTS 3. PURITY AND CONVERGENCE 3-3: STATIC CONVERGENCE ADJUSTMENTS NOTE Adjust after performing adjustments in section 3-2. NOTE Receive the crosshatch pattern from the color bar genera- Turn the unit on and let it warm up for at least 30 minutes tor.
  • Page 13 AV-14F703 ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CRT PCB R806 R808 TP805 TP806 CP804 J802 CD803 CP803 CP805_1 CD801 CP801A CP101 FB401 CP401 T501 VR502 SPEAKER CP502 L503 CP507 R527 CP508 TP002 S501 AC IN S502...
  • Page 14 AV-14F703 GUIDE FOR REPAIRING IC DESCRIPTION MAIN PCB OEC7075A (IC101) Pin name Symbol I/O Logic Function Option P11/SCL1 AUDIO MUTE Audio MUTE Output C-MOS P00/PM0 EXT MUTE Audio MUTE Output for external Output Nch-OD P01/PWM1 STANDBY_H Output HIGH at a teleevision power off.
  • Page 15 AV-14F703 TROUBLESHOOTING GUIDE NO POWER Is the voltage at the point (A) Is the voltage at pin G Check Q502 and associated circuit. in the Figure DC160V ? of Q502 DC5V ? Check Q514 and associated circuit. T502 Is the voltage at the point (B) Check R501 and R541.
  • Page 16 AV-14F703 TROUBLESHOOTING GUIDE NO RASTER Does the RASTER Is the voltage of pin 1 of Check the output circuit and appear at maximum associated circuit. CP805 DC180V ? BRIGHT/CONTRAST ? Check the 180V line. Is the high voltage of Is the heater voltage at...
  • Page 17 AV-14F703 TROUBLESHOOTING GUIDE NO COLOR Are the waveforms at pins 3, Defect of CRT or contact defects 7 and 9 of J802 normal ? of J802. Are the waveforms at pins 6, Check the output circuit and 7 and 8 of CP805 normal ? associated circuit.
  • Page 18 AV-14F703 TROUBLESHOOTING GUIDE NO VERTICAL Is the waveform at pin Check DY. 6 of CP401 normal ? Check IC401 and check the Is the waveform at pin Is the voltage at pin 2 1 of IC401 normal ? of IC401 25V? peripheral circuit.
  • Page 19 AV-14F703 TROUBLESHOOTING GUIDE NO SOUND Is sound setting appropriate ? Is the waveform at pins 7 Check speaker. and 12 of IC1001? Is the AUDIO signal at pins Check IC1001 and peripheral circuit. 7 and 14 of IC301? Is the AUDIO signal at pins...
  • Page 20 AV-14F703 TROUBLESHOOTING GUIDE NO CCD Is the video signal at pin Check IC1001 and check 26 of IC101 ? peripheral circuit. Is the video signal at Check IC701 and check pin 31 of IC701 ? peripheral circuit. Check IC601 and check paripheral circuit.
  • Page 21 AV-14F703 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 .
  • Page 22 AV-14F703 MECHANICAL REPLACEMENT PARTS LIST ! Ref.No. Part No. Part Name Description X-A3L005J720 CABINET,FRONT ASSY X-7230006818 SHEET,CAUTION X-713WPA0167 GLASS,LED X-735WPA0583 BUTTON,HOLDER X-7235380006 BADGE,BRAND X-800WQ0A009 FELT SHEET X-735WPBA299 BUTTON,FRAME X-702WPAA208 CABINET,BACK X-722538A018 SHEET,RATING X-800WQ00039 FELT SHEET X-741WUA0019 SPRING,EARTH X-7220001119 SHEET,CSA WARNING...
  • Page 23 AV-14F703 MECHANICAL EXPLODED VIEW PCB110 (CRT PCB) FB401 L503 X-043214035F X-028R140023 V801 X-098Q150403 PCB010 SP1002 (MAIN PCB) X-070C533008 TU001 X-0145K00056 SP1001 X-070C533008 No. 52002...
  • Page 24 AV-14F703 ELECTRICAL REPLACEMENT PARTS LIST MAIN PCB ASS’Y ! Symbol No. ! Symbol No. Part No. Part Name Description Part No. Part Name Description PCB010 X-A3L005J010 MAIN PCB ASS’Y TMA532B RESISTORS R305 NRSA02J-103X MG R 10KØ 1/10W VARIABLE RESISTORS R314...
  • Page 25 AV-14F703 ! Symbol No. ! Symbol No. Part No. Part Name Description Part No. Part Name Description RESISTORS RESISTORS R553 X-R002T2682J 6.8KØ 1/2W R1506 NRSA02J-332X MG R 3.3KØ 1/10W ! R554 X-R002T2104J 100KØ 1/2W R1507 NRSA02J-102X MG R 1KØ 1/10W...
  • Page 26 AV-14F703 ! Symbol No. ! Symbol No. Part No. Part Name Description Part No. Part Name Description CAPACITORS CAPACITORS C312 QEKJ1CM-106Z 10µF C618 NCB21HK-103X 0.01µF C313 X-E02LU2101M 100µF C619 X-E02LT0471M 470µF 6.3V C314 QEKJ1CM-106Z 10µF C620 NCB21EK-104X 0.1µF C315 X-E02LU1221M 220µF...
  • Page 27 AV-14F703 ! Symbol No. ! Symbol No. Part No. Part Name Description Part No. Part Name Description CAPACITORS DIODES C1007 X-E02LU5220M 22µF D606 MTZJ5.6B-T2 ZENER C1008 X-E02LU52R2M 2.2µF D608 1SS133-T2 SILICON C1009 X-E02LF3102M 1000µF D609 MTZJ5.6B-T2 ZENER C1010 NCB21HK-103X 0.01µF D610 MTZJ5.6B-T2...
  • Page 28 AV-14F703 ! Symbol No. ! Symbol No. Part No. Part Name Description Part No. Part Name Description COILS OTHERS L204 X-021LA6150K COIL 15µH EL001 X-124120301A EYE LET XRY20X30BD L205 X-021673470K COIL 47µH EL002 X-124116281A EYE LET XRY16X28BD ! F501 L301...
  • Page 29 AV-14F703 REMOTE CONTROL UNIT PARTS LIST (RM-C309G) ! Symbol No. ! Symbol No. ! Ref. No. Part No. Part Name Description Part No. Part No. Part Name Part Name Description Description COILS UR52EC1286C BATTERY COVER L802 X-021673151K COIL 150µH L803...
  • Page 30 AV-14F703 PACKING 1,8,9,10,11,12,13 ACCESSORY REPLACEMENT PARTS LIST ! Ref.No. Part No. Part Name Description X-076G0EC010 TRANSMITTER EUR524339(RM-C309G) X-723000B868 SHEET,UPC X-791WHA0090 LAMIFILM,BAG X-792WHA0332 PACKAGE,TOP X-792WHA0333 PACKAGE,BOTTOM X-793WCDB243 GIFT BOX X-JB5KD500 POLYBAG,INSTRUCTION(RED CAUTION) X-J3L00501 INSTRUCTION BOOK X-J5500112 GUARANTEE CARD X-J5500115 SERVICE STATION LIST...
  • Page 31 AV-14F703 SCHEMATIC DIAGRAMS COLOR TELEVISION AV-14F703 CD-ROM No. SML200204 No. 52002 COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD. Apr. 2002...

  • Page 32: Table Of Contents

    AV-14F703 AV-14F703 STANDARD CIRCUIT DIAGRAM CONTENTS SEMICONDUCTOR BASE CONNECTIONS ..............2-2 BLOCK DIAGRAM ......................2-3 SCHEMATIC DIAGRAMS ....................2-5 MAIN PCB MICON/TUNER SCHEMATIC DIAGRAM MAIN PCB CHROMA/IF SCHEMATIC DIAGRAM MAIN PCB DEFLECTION SCHEMATIC DIAGRAM MAIN PCB POWER SCHEMATIC DIAGRAM MAIN PCB SOUND SCHEMATIC DIAGRAM...

  • Page 33: Semiconductor Base Connections

    AV-14F703 SEMICONDUCTOR BASE CONNECTIONS DIODE CATHODE ANODE 1N4937 10ELS6N-TA1B2 RM11C-EIC SLR-342VCT32 1SS133T-77 11E1-EIC SB290S AU02A-EIC 30DF6-FC MTZJ12B T-77 MTZJ18B T-77 MTZJ30B T-77 MTZJ33A T-77 MTZJ5.6B T-77 MTZJ6.2B T-77 MTZJ8.2B T-77 MTZJ9.1B T-77 NJM2150AM PST600C KIA7805API LTV-817M-VB TB1253N M62420SP AN5829S S-24C16AFJA-TB-0...

  • Page 34: Block Diagram

    AV-14F703 AV-14F703 BLOCK DIAGRAM SPEAKER SPEAKER SP1001 SP1002 TU001 DEFLCTION SIGNAL MICON IC AUDIO SIGNAL IC101 OEC7075A TUNER AUDIO SIGNAL G. SIGNAL SYNC RESET IC COLOR SIGNAL IC103 PST600C H SYNC LUMINANCE SIGNAL HEAD TUNER VIDEO SIGNAL PHONE JACK IC 503 B.

  • Page 35: Schematic Diagrams

    AV-14F703 AV-14F703 SCHEMATIC DIAGRAMS [MAIN PCB MICON/TUNER SCHEMATIC DIAGRAM] MICON/TUNER SCHEMATIC DIAGRAM (MAIN PCB) OS101 RPM7138-H5 ACCESORY TU001 TECC1040PG32E TEST POINT CP101 BT001 173979-7 R6P(AR)XICI R003 I2C_SCL TM101 330K I2C_SDA BT002 R111 EUR524339 R6P(AR)XICI I2C_OFF H-BUFFER Q102 2SC2412K C003 RED LED...

  • Page 36: Main Pcb Chroma/If Schematic Diagram

    AV-14F703 AV-14F703 [MAIN PCB CHROMA/IF SCHEMATIC DIAGRAM] CHROMA/IF SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO AV C_V_OUT_SW Y_V_OUT_SW FROM/TO MICON/TUNER TUNER_VIDEO R214 SYNC_OUT TUNER_AUDIO_L AUDIO TUNER_AUDIO_R BUFFER C213 Q201 2SC2412K OSD_B OSD_G C615 R608 FROM AV OSD_R C212 1/4W W820 TV BUFFER R205 0.01 B...

  • Page 37: Main Pcb Deflection Schematic Diagram

    AV-14F703 AV-14F703 [MAIN PCB DEFLECTION SCHEMATIC DIAGRAM] DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) V.OUTPUT IC IC401 AN5522 THERMAL PROTECTION PUMP UP 25.0 12.0 25.0 R407 5.6K C411 R414 500V FROM/TO DY 27K +-1% R417 33K V801 CP401 A36AKJ13X05 B06B-DVS W860 C418...

  • Page 38: Main Pcb Power Schematic Diagram

    AV-14F703 AV-14F703 [MAIN PCB POWER SCHEMATIC DIAGRAM] POWER SCHEMATIC DIAGRAM 6.3A 125V (MAIN PCB) CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE 6.3A 125V(F501) ATTENTION:POUR UNE PROTECTION CONTINUE LES RISQUES D’INCEIE N’UTOLISER QUE DES FUSIBLE DE MEME TYPE 6.3A 125V(F501)

  • Page 39: Main Pcb Sound Schematic Diagram

    AV-14F703 AV-14F703 [MAIN PCB SOUND SCHEMATIC DIAGRAM] SOUND SCHEMATIC DIAGRAM (MAIN PCB) FROM AV R314 SW_AUDIO_R 1.5K R324 C334 SW_AUDIO_L 1.8K 0.033 B C332 R326 C331 0.47 B 100 1/4W 0.022 R328 1.8K TONE 136K R301 C306 R303 C308 AMP1...

  • Page 40: Main Pcb Av Schematic Diagram

    AV-14F703 AV-14F703 [MAIN PCB AV SCHEMATIC DIAGRAM] AV SCHEMATIC DIAGRAM TO CHROMA/IF (MAIN PCB) CD701A CH243001 YUV_IN(REAR) J704 MSP-213V1-652_PBSN A/V_OUT(REAR) J708 MSP-213V2-432_PBSN LINE2(REAR) J703 FROM POWER MSP-213V2-432_PBSN L703 P.CON+9V 47uH 0305 C713 R751 C714 R752 FROM/TO COMB/FILTER SW_VIDEO_OUT C715 R713...

  • Page 41: Main Pcb Comb/Filter Schematic Diagram

    AV-14F703 AV-14F703 [MAIN PCB COMB/FILTER SCHEMATIC DIAGRAM] COMB/FILTER SCHEMATIC DIAGRAM (MAIN PCB) L1505 L1511 15uH 0305 15uH C1523 0305 120P CH 8.78 3.80 BUFFER BUFFER 8.15 4.92 Q1506 Q1503 W852 C1513 2.77 BUFFER 2SA1037AK 1.50 2SC2412K Q1505 0.1 B 2.14...

  • Page 42: Crt Pcb Schematic Diagram

    AV-14F703 AV-14F703 [CRT PCB SCHEMATIC DIAGRAM] CRT SCHEMATIC DIAGRAM (CRT PCB) TP804 R828 FROM DEFLECTION 2.7K 1/4W CP805_1 (CP801A) A2001WV2-10P RED/GREEN AMP Q801 123.5 P.CON+9V R813 2SC2621 G.OUT 220 1/4W R.OUT B.OUT D801 HEATER RED/GREEN 1SS133 Q810 R801 KTC3199_Y 100 1/4W...

  • Page 43: Pattern Diagrams

    AV-14F703 AV-14F703 PATTERN DIAGRAMS [MAIN PCB PATTERN (INSERTED PARTS)] W006 W826 CP801A D411 J702 J704 CP101 D407 J701 J703 J708 W158 L703 C427 CD701A W801 R734 C428_1 W850 W860 R402_1 W065 W813 W064 IC701 W063 FB401_1 C418 C004 CP401 W096...
  • Page 44 AV-14F703 AV-14F703 [MAIN PCB PATTERN (CHIP MOUNTED PARTS)] Q705 Q108 R737 IC198 R104 R731 Q704 R510 Q1503 R1507 R1506 C336 C554 C136 R155 C920 R319 R1504 C334 R532 Q509 C928 R111 R324 C137 C1514 C926 C330 C923 C333 R303 R146...

  • Page 45: Crt Pcb Pattern

    AV-14F703 AV-14F703 [CRT PCB PATTERN] R802 Q811 D808 D802 L803 C813 CP804 C808 W002 D801 W001 W804 Q810 D803 Q812 R808 R803 No.52002 2-25 2-26 No.52002...

  • Page 46: Waveforms

    AV-14F703 WAVEFORMS MICON/TUNER 1 1V 0.1 s/div 1V 20 s/div 11 0.5V 20 s/div 2 1V 1 s/div 7 1V 20 s/div 12 1V 2 s/div 3 1V 50 s/div 0.5V 10ms/div 13 1V 20 s/div 4 1V 0.1ms/div 9 1V 50 s/div...
  • Page 47 AV-14F703 DEFLECTION SOUND 22 2V 5ms/div 27 5V 2ms/div 16 2V 5ms/div 23 2V 5ms/div 28 200mV 20 s/div 17 20V 5ms/div 24 2V 5ms/div 29 200mV 20 s/div 18 10V 10ms/div 20 2V 20 s/div 25 2V 5ms/div 30 2V 20 s/div...
  • Page 48 AV-14F703 32 2V 5ms/div 33 2V 5ms/div 37 50V 20 s/div 38 50V 20 s/div 39 50V 20 s/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram. No.52002 2-29...

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