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XOCECO PH-50HA31 Service Manual

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PDP TELEVISION
PH-50HA31

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Summary of Contents for XOCECO PH-50HA31

  • Page 1 PDP TELEVISION PH-50HA31...

  • Page 2: Table Of Contents

    CONTENTS Safety precautions………………………………………………………………………..… Alignment instructions …………………………….…….………………………………… Method of software upgrading……………….…….……………………………………….……. Working principle analysis of the unit……………………………….………….…………. Block diagram…………………………………..………………………………….………… IC block diagram………………………………………………………………………..…… Wiring diagram ……………………………………………………………………………. Troubleshooting guide ………………………………………………………………..…… Schematic diagram………………………………………………………………………… APPENDIX-A: Assembly list APPENDIX-B: Exploded View...

  • Page 3: Safety Precautions

    Attention: This service manual is only for service personnel to take reference with. Before servicing please read the following points carefully. Safety precautions Please read the “Points for attention for the Maintenance & Repair of PDP” and “Criterion for Identifying the Defects on Screen” as below, before inspecting and adjusting the TV set. 1.
  • Page 4 narrow and in bad ventilation. 1.10 There are quite a number of circuits in PDP that are integrated ones. Please be on guard against static electricity. During maintenance operation be sure to cover yourself with anti-static bag and before operation make sure to have it sufficiently grounded. 1.11 There are a big number of connection wires distributed around the screen.

  • Page 5: Alignment Instructions

    too big screw. 1.20 Care must be taken to guard against dust during assembling or dismantling, especially to avoid dirt from falling in between the screen and the glass lest it should harm the receiving and viewing effect. 1.21 There is piece of insulator stuck on the rear chassis corresponding to the power supply board. It is used to isolate the cool part from the hot part.
  • Page 6 Fig-1 adjustment flow-chart 3. Description of adjustment 3.1 Unit adjustment Connect the signal processing board, side AV board, button board and remote control receiver board according to the wiring diagram. Connect with power and observe the display. Method for using factory menu: press ”INPUT” button, then press”2580” to enter level one factory menu.
  • Page 7 4.5 HDMI terminal HDMI signal format receives the three high-definition signals: 480I, 480P, 720P/60Hz, 1080I/60Hz, except for the table 2 signal. Check if the image (contain HDCP ON and OFF) and sound are normal. Table 2 VGA signal format Point clock pulse Resolution H-frequency(kHz) V-frenquency(Hz) Remark...
  • Page 8 1.Antenna(signal): Picture is out of focus or jumping Bad status in signal receiving Poor signal Check if there are failures with the electrical connector or the antenna. Check if the antenna is properly connected. Fringe in picture Check if the antenna is correctly oriented. Maybe there is electric wave reflected from hilltop or building.
  • Page 9 Symptoms Possible cause It maybe also due to improper terminal connection of the video frequency signal in a certain position of the system. Picture is whitish or too bright in Check if the setting for the brightness is too high the darkest area of the picture Possibly the brightness grade of DVD player (broadcaster) is set too high.

  • Page 10: Method Of Software Upgrading

    Method of software upgrading 1. Connect computer serial port and TV parallel port with serial wire 665.D0002-645. 2. Open iDev.exe 3. Click , enter the setting interface. Set Serial Port to the current COM port, set the Baud Rate to 1152000, Image Path to the path of the new software.
  • Page 11 5. Turn on the TV, the software begins to be written. 6. After the software written, Press the power key (local keypad) and holding for several second to force power off TV set, 7. Turn on the TV again and enter the factory menu initialization setting.

  • Page 12: Working Principle Analysis Of The Unit

    Working principle analysis of the unit 1. NTSC signal flow: Antenna reception NTSC signal send to the integrative tuner TDQDU4-508A, which contains HF and IF amplifier circuit and video decoding circuit. It is controlled by main IC ZR39760 (integrate CPU) through I2C bus. The NTSC signal via frequency tuning, HF amplification, IF amplification, system switching and decoding, output video signal TV-CVBS of 1Vpp and sound IF signal (SIF).

  • Page 13: Block Diagram

    Block diagram...

  • Page 14: Ic Block Diagram

    IC block diagram 1. ZR39760...
  • Page 15 2. MST9883 MST9883 is a Triple Video A/D Converter with Clamps & Pixel Clock Synthesizer. The triple ADC support 12 - 110 MHz Sampling Rate. It integrated 5-bit pixel clock phase adjustment for precise sample timing control. Its Output support 4:2:2 Format Mode and it can Pin Compatible with AD9883A.
  • Page 17 Pin configuration of MST9883: Pin descriptions of MST9883: 54: Red analog input 48: Green analog input 43: Blue analog input 49: Sync on Green analog input 38: External Clamp Input 30: Horizontal SYNC Input 31: Vertical SYNC Input 29: Hold PLL Frequency, do not track HSYNC 56: Serial Interface clock 57: Serial Interface data pin 55: Serial interface address pin...
  • Page 18 26,27,34,35: PLL Power 11, 22, 23, 69,78,79: Digital Output Power 1,10,20,21,24,25,28,32,36,40,41,44,47,50,53,60,61,63,68,80:Ground 3. R2S15903SP R2S15903SP is an audio signal processor. It has MUTE and Volume/Tone control. It can support 5 input selector. Pin descriptions of R2S15903SP: 5, 28: AV OUT INPUT L/R 2, 31: other channels 17, 18:I2C SDA/SCL 32: Power Supply...
  • Page 19 4. RS15102 RS15102 is the high effective D type of power amplifier. The output power can reach 20W (10% THD+N) with 8-Ω speakers, +18V power supply, eliminating the need for heat sinks. Pin description: 1: audio-out, left audio output 15: audio-out, right audio output 11: audio-in, left audio input 5: audio-in, right audio input 14: mute1...
  • Page 20 5. M52797SP AV switch with I2C bus control Pin description: VCC 9V VIDEO OUT 2, 4 AV2 L R IN 19, 21 L R OUT AV2 VIDEO IN AV CVBS OUT TV-CVBS IN TUNER_IN 5, 7 Y Pr Pb1 L R IN 22, 24 TV L R IN 8, 10 Y Pr Pb2 L R IN 11, 12...

  • Page 21: Wiring Diagram

    Wiring diagram...

  • Page 22: Troubleshooting Guide

    Troubleshooting guide Begin Check if XP1 9# on the main board is 3.3V, Turn on the TV? if it’s 0V, check the power supply of the power board. Check if the pin3 of XP1 on the main board A green indicator is high level(+5V)? if not, check the power lights? board and NP2.
  • Page 23 (2) no picture, no sound No picture, no sound Check the color of indicator light Blue If XP1 9# is 3.3V? Check power Check the output voltage of board sockets XP1, XV2 No sound No picture Power board problem Refer to (3) checking Refer to (4) checking procedure procedure...
  • Page 24 (4) with sound but no picture With sound but no picture Display OSD MENU? Display LOGO? Check if the crystal in data processing board starts, If there is no picture DDR clock and DDR SDRAM are normal? in all channels? Check N100 Refer to (6), (7), (8), (9), (10),...
  • Page 25 (6) NTSC channel no picture Check if pin4 of TUN1 output signals? Check if CB154 outputs Check TUN1 power supply and signals? the peripheral circuit. Check N100 periphery circuit (7) ATSC channel no picture Check if pin20/21 of TUN1 output signals? Check if the crystal is Check TUN1 power supply and normal? If output signal?
  • Page 26 Troubleshooting guide of power supply board a. No power supply No power supply Check if X501 FU501 is Does AC voltage at C502 properly inserted? Does DC voltage at C514 (300~385V) Check D501, R513, D502 Check if the 15V DC of Check N503 or peripheral N503 (pin12) circuit...

  • Page 27: Schematic Diagram

    602. L37HA37-01...
  • Page 28 602. 32HA37-01 602. 32HA37-01 602. 32HA37-01 602.L37HA37-01...
  • Page 29 602.L37HA37-01...
  • Page 30 602.L37HA37-01...
  • Page 31 602.L37HA37-01...
  • Page 32 602.L37HA37-01...
  • Page 33 602.L37HA37-01...
  • Page 34 602.L37HA37-01...
  • Page 35 602.L37HA37-01...
  • Page 36 602.L37HA37-01...
  • Page 39 APPENDIX-A: Main assembly 9350HA3110 MAIN COMPONENT AND IT'S NO. NAME N100 ZR39760 (5273976001) R2S15102 (5271510201) R2S15903 (5271590301) Digital processing board 6HA0196910 M52797 (5275279701) NA102 MST9983 (5279983003) NA25 FSHDMI04 (5270004002) Key board 6HU0670510 IR board 6HA0150910 Interface connection board 6HA0082910 Power filter board 6FK0105110 Power board 6HA0182010...
  • Page 40 APPENDIX: EXPLODED VIEW PH50X31...
  • Page 41 PART LIST OF EXPLODED VIEW DESCRIPTION front cabinet panel filter glass upsh board (left) upsh board (upper1) upsh board (upper2) push board (right) connection of panel analog board CPU board power switch bracket key board wall mounting bracket back cabinet back baffle speaker back cover (left) speaker back cover (right)
  • Page 42 9350HA3110 Ver.1.0...

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