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TCL DVD-F70 Service Manual

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SERVICE MANUAL
DVD-F70
DVD-F61

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Summary of Contents for TCL DVD-F70

  • Page 1 SERVICE MANUAL DVD-F70 DVD-F61...

  • Page 2: Table Of Contents

    Table of Contents Table of Contents ........................1 Figure 1. Schematic Diagram ......................2 Figure 2. Basic Circuit Diagram ......................3 Failure & Troubleshooting of Power Supply ..................4 Troubleshooting and service of the Loader ................... 4-5 Troubleshooting and service of Decoding Part ..................5 Troubleshooting and service of Video Part ....................6 Troubleshooting and service of Audio Part ....................6 Troubleshooting and service of KARAOKE Part ..................
  • Page 3 Figure 1 Schematic Diagram(TD-F61/F62/F63/F70) AV BOARD A B V O ARD CON101 3.3V POWER -24V MAIN BOARD BOARD MAIN BOARD GND/VSDA0 PCON CON301 VSDA VSCK VSTB -24V PCON FRONT BOARD TD-F62/63/F50 TD-F61/F70/F71 KARAOKE KARAOKE BOARD DVD LOAD BOARD D LO V D A D...
  • Page 4 Figure 2 Basic Circuit Diagram MT1336 VIDEO LPF DVD LOAD VIDEO & D LO V A D D & DRIVE DRIVE 2402 VIDEO VIDEO D/A SPDIF SPDIF OUT EEPROM CS4954/4955 CS4954/4955 MT1369 2*16Mbit WM8746 WM8746 MC4558 MC4558 SDRAM AUDIO D/A AUDIO AMP&LPF DECODER&SERVO AUDIO...

  • Page 5: Failure & Troubleshooting Of Power Supply

    a. Principle of power supply operating Adopts switched-mode power supply module TOP233Y of TOPSWITCH company, it can protect itself from over current, overheating, and short-circuit, etc. This circuitry mainly stabilizes at +5V, and fluctuates within a permissible range, such as +5V, VA+, VA-, +3.3V and -24V. Please pay attention to the high voltage inside the white paint of PCB while repairing.

  • Page 6: Troubleshooting And Service Of Decoding Part

    pole of Q1 and Q2, and whether U2 and adjacent parts are damaged or weld falsely. d). If the above parts are normal and no laser emits, replace the loader. b. Read no disc a). Check whether the ribbon wire from 24P to loader is in good contact. b).

  • Page 7: Troubleshooting And Service Of Video Part

    Check U10 that whether the data of pins from the 1st to the 8th, hsync and vsync signal of the 10th and 11th pins, and 27MHz signal of the 29th pin are normal, and whether C162 and R68 are normal. If not, replace U10. 2).

  • Page 8: Full Screen Display Or No Display On Vfd

    7. Full screen display or no display on VFD a). Full screen display on VFD is often caused by abnormal -24V bias voltage. Check whether D5, C19 and R17 are disconnected. b). If there is no display on VFD, firstly, check whether the filament lights in red. If not, and there is no 3.3V voltage difference between AC1 and AC2, check whether D6, C9 and R21 are damaged.

  • Page 9: Servo Schematic Circuit 1

    Servo schematic circuit 1 RFVCC1 AVCC RVCC AVCC +5VP FB / 0805 0(0805) 0(0805) 0(0805) LDO_AVCC RVCCIN RFVCC RVCC FB / 0805 0(open) TRCLOSE 0(open) 100u 100u 0(open) TROPEN ENDM 0.1u STBY DV33 RFVCC1 FB AXIAL(open) FB / 0805 DV33 AVCC RFVCC RVCCIN...

  • Page 10: Servo Schematic Circuit 2

    Servo schematic circuit 2 AV33 VSCK VSCK VSDA VSDA URST DV33 AV33 URST 0.1u 0.1u V1P4 100k FB AXIAL HTRC HTRC [ 2 ] 0.1u RFRP RFRP [ 2 ] 0.1u DV33 DV33 [ 2 ] RFRP [ 2 ] HTRC (open) 1000p...

  • Page 11: Decoder Schematic Circuit 1

    Decoder schematic circuit 1 ( 3 ) DCLK DCLK DCKE DCKE DMA0 RDQ0 ( 3 ) +5VP +5VP DMA1 RDQ1 ( 1 , 2 , 3 , 5 , 6 ) ( 3 ) CAS# CAS# DMA2 RDQ2 ( 3 ) RAS# RAS# ( 1 , 2 , 3 , 5 )

  • Page 12: Decoder Schematic Circuit 2

    Decoder schematic circuit 2 VA+1 VA+1 U13A C173 R109 FERB(0805) 0R(OPEN) 10uF/16V(short) VA+1 4558 Rs_OUT U12A C165 4558 10uF/16V(short) FERB(0805) MAINR VA-1 R110 C174 10K(open) OPEN C166 VA-1 R106 R108 10K(open) OPEN 3.3K VA-1 MUTE 3.3K C172 OPEN 150pF R111 C164 OPEN C163...

  • Page 13: Front Control Board Schematic Circuit

    Front control board schematic circuit (HV-2000) CO M[1 ..4] SG [1..40 ] STB+5V SG12 SG35 SG33 SG16 SG13 SG34 SG34 SG15 SG14 SG33 R301 SG35 SG14 SG15 SG32 SG36 SG13 SG16 SG31 SG37 SG12 SG17 SG30 SG38 SG11 SG18 SG29 SG39 SG10 COM1...

  • Page 14: Karaoke Schematic Circuit

    Front control board schematic circuit (HV-2100) VCCA R318 VFD301 4.7K HNV-06SS63T R320 D306 R317 R326 4.7K R316 4.7K 4.7K 1N4148 C301 R319 U302 4.7K NOTE-STDBY T0CKI OSC1 /MCLR OSC2 4MHz POWOFF PCON -24V C313 C312 P_MUTE C311 C314 10uF PIC16C54S D304 VCCA STANDBY...

  • Page 15: Output Schematic Circuit

    Karaoke schematic circuit 4558 SHORT/1UF VAM+ 100UF/25V 8.2K 4.7UF/50V MIC2 2.2K 4558 4.7UF/50V 22UF/16V 4.7UF/50V 4.7UF/50V OPEN/103 1.2K VAM- MIC1 1UF/16V 5.1K 100UF/25V 2.2K 22UF/16V PT2399 M-DET 9015 1UF/16V 9014 47UF/16V IN4148 100UF/16V 1.5K 150K 4.7UF/16V M-DET VAM+ VAM- 6 * 2 . 5...

  • Page 16: Power Schematic Circuit

    Output schematic circuit CN101 Svideo_Y 470R 10uF/16v 470R CVBS 10uF/16v Svideo_C 100P 100P Cr/B MUTE MUTE 9014C Cb/R 9014C 470R 470R SPDIF SUB1 5.1CH MUTE SUB1 10uF/16v 470R 470R 10uF/16v 100P MUTE 100P 470R 9014C con20(1.25) MUTE 9014C 470R A U D I O P S C A N O U T AUDIO PSCAN...
  • Page 17 Power schematic circuit CN401 HEADER D408-NU FUSE401 C401 TR401 FR104 -24V T1.6A/250ac 0.1uF/250Vac NTC10R 5VSTB CON401 L401 C408 D401 D403 C412-NU PCON A I N C P UT 38mH 102/250Vac 1N4007 1N4007 R424-NU 100uF/16V RV401 C402 V A - 300V 0.1uF/250Vac V A + D402...

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Dvd-f61

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