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XOCECO PH-50FB31 Service Manual

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PDP TELEVISION
PH-42/50FB31

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Summary of Contents for XOCECO PH-50FB31

  • Page 1 PDP TELEVISION PH-42/50FB31...

  • Page 2: Table Of Contents

    CONTENTS Safety precautions………………………………………………………………………..… Criterion for identifying the defects on screen…………………………………………… Alignment instructions …………………………….…….…………………………………. Method of software upgrading……………….…….………………………………………. Working principle analysis of the unit……………………………….………….…………. Block diagram…………………………………..………………………………….………… IC block diagram………………………………………………………………………..…… Wiring diagram ………………………………………………………………………………. Troubleshooting guide ………………………………………………………………..…….. Schematic diagram………………………………………………………………………….. APPENDIX: Exploded View...

  • Page 3: Safety Precautions

    Note: This maintenance manual is intended only for the reference of the maintenance people. Please pay attention to the following points before carrying out the maintenance work. Safety Precautions Please read the “Points for attention for the Maintenance & Repair of PDP” and “Criterion for Identifying the Defects on Screen”...
  • Page 4 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. Please take care not to touch or scuff them during maintenance or removing the screen, because once they are damaged the screen will fail to work and it’s not possible to repair it.

  • Page 5: Criterion For Identifying The Defects On Screen

    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. Please take care to keep it intact lest it should become a potential safety trouble.
  • Page 6 deemed as sub-standard. Zone B Zone A Item Kind Area A Area B Remark Dark spots No more than 4 No more than 10 Total number of defective points in A and B shall not Bright spot No more than 1 No more than 3 exceed 14.

  • Page 7: Alignment Instructions

    Alignment instructions 1. Test equipment PM5515 (video signal generator) VG-849 (YUV, VGA, HDMI signal generator) CA100 (white balancer) 2. The alignment flow chart (see below figure) Check DDC and FLASH To produce digital board and analog board All testing Adjust white balance Connect with central signal source, then check each function of TV such as station missing, analog control etc., check the output of headphone and speaker Input AV/SVIDEO signal, then check each function of all the terminals...
  • Page 8 select adjustment page, then press “OK” to access. Press “▲” and “▼“ to move cursor up and down, when the cursor stays on a certain adjustment item, you can adjust it according the prompt. Press “MENU” exit to the level one factory menu; press “MENU” again to exit from the factory menu. The adjustment item is list as table 3.
  • Page 9 4.3 YPbPr/YCbCr terminal Input YUV signal (VG-849 signal generator), separate input YUV format signal of table 4 and check if the picture and sound are normal. Table 4 YUV signal format H-frequency (KHz) V-frequency (KHz) Signal 15.734 59.94 SDTV 480i 31.469 59.94 HDTV 480p...

  • Page 10: Method Of Software Upgrading

    Color Temperature: Cool 4) Audio menu, Audio Mode: Speech(other items: Custom, Music, Movie) Balance: 50, SPDIF Mode: Auto, HP Volume:50 5) Rate menu, Rating: No Block, Parent Lock: off 6) System menu, State: NSW/ACT(other items: VIC, QLD, SA, WA, TAS, NT) Note: the default password of Rate menu is”0000”...
  • Page 11 3. Copy the update tools (iDev.exe) to the path you want to do it, and double click it. 4. Select “setup” menu.
  • Page 12 5. Confirm the Serial port is right. Base on the port which using for update. And set the band rate to 115200 (default). 6. Select the “Image path” menu.
  • Page 13 7. Confirm it’s the right file. 8. If it’s not right(Maybe you didn’t select it before),click the “…”button to select “*.ecc” file. Sometimes the image file you got it will be “*.rar ”or “*.zip” zip file, needs unzip it first. 9.
  • Page 14 10. Then click the “down” button.
  • Page 15 11. You can see the “waiting” window. 12. Then power (off then) on the TV set. 13. After download, it will be burning.
  • Page 16 14. Last it will be finished 15. Press the (IR/ locate keypad) power key and holding for several second to force power off TV set, then power on again. It would be ok now. If it’s failure you can try once again.

  • Page 17: Working Principle Analysis Of The Unit

    Working principle analysis of the unit Feature: 1. PDP PANEL SIZE: 42” 50” Pixel Rate:1024X768 1366X768 Interface: LVDS(Single 24bits) 2. SIGNAL FEATURES TV: PAL-BG / DVB-T RF Frequency Range:46.25~855.25MHz PC Max. Resolution: Up to 1280 x 1024 60Hz PC Max. Pixel Rate:110MHz COMPONENT:480i,480p,576i,576p,720p/50Hz, 1080i/50Hz,720p/60Hz,1080i/60Hz HDMI Max.
  • Page 18 Working principle 1. PAL-BG signal flow: Antenna reception PAL-BG signal send to the integrative tuner FQD1216, which contains HF and IF amplifier circuit and video decoding circuit. It is controlled by main IC ZR39660 (inside CPU) through I2C bus. The PAL-BG 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 19: Block Diagram

    Block diagram CVBS_TV HS,VS,CLK 24-BIT Data Panel...

  • Page 20: Ic Block Diagram

    IC block diagram 1. ZR39660 Pin descriptions of ZR39660: (1) Serial Transport Input Port T4: MPEG Transport Port Input Clock T3: MPEG Transport Input Data U3: MPEG Transport Input Frame Y1: MPEG Transport Input Valid (2) HDMI Input D1,E3,F3,E2,F2,E1: HDMI Differential Data Pairs D2,C1: HDMI Differential Clock Pair C3: HDMI Serial Clock...
  • Page 21 B2: HDMI Serial Data A1: HDMI Hot Plug Detect D3: HDMI Current Set (3) NTSC/PAL Analog Input Port W2:Video Front End Luminance In Y3:Video Front End Chroma In W3:Video Front End Common Mode Reference (4) Analog Video Output K18:Composite Data Output (CVBS) J20:Blue/Pb Pixel Data Output J18:Green/Y Pixel Data Output J19:Red/Pr Pixel Data Output...
  • Page 22 N5:Power On Reset L4:Infrared Receive 2. DRX3975D The DRX 3975D is a fourth-generation COFDM demodulator that offers today’s highest level of front-end integration resulting in ultimate DVB-T digital reception, compliant to ETS 300 744, DTG D-Book,EICTA E-Book, and Nordig Unified v1.0.2 . The IC applies cutting-edge digital filtering techniques in combination with a high-performance A/D-converter and PLL configuration, resulting in superior performance figures in the presence of digital- and analog adjacent channels.
  • Page 23 Pin description of DRX3975D: 2: RESET_N 56, 57: Oscillator 22: Select I2C address 33: I2C data for host communication with the tuner 34: I2C clock to the tuner 15: I2C clock from host 16: I2C data from/to host 38, 39: Differential input for IF 17, 18, 21,25: Serial Transport Output Port 3.
  • Page 24 Pin configuration of TDA8759: Pin description: 78,79,80: Red analog input 63,64,65: Green analog input 50,51,52: Blue analog input 72,73,74: Sync on Green analog input 108,109,110: Horizontal SYNC Input 105,106,107: Vertical SYNC Input 29: Hold PLL Frequency, do not track HSYNC 119: Serial Interface clock 118: Serial Interface data pin 96: Serial interface address pin...
  • Page 25 4. Audio processor SGTV5810 The SGTV58xy is a TV audio processor designed to serve as a low cost, integrated audio CODEC for hybrid (analog and digital) TVs, digital only TVs, and analog TVs. Other applications include set top boxes or other media applications where a low cost, high fidelity audio processor is required.
  • Page 26 Pin configuration of SGTV5810: Pin description of SGTV5810: 69-72,57-60,51-54,43-50: Analog AUDIO INPUT L/R 42,39: EAR PHONE L/R 30-35: AV AUDIO OUT L/R 38,37: MAIN AUDIO OUTPUT L/R 93,92: I2C SDA/SCL 95,94: Serial interface address pin 96: RESET_N 83,81:SIF INPUT 87,86: Oscillator...
  • Page 27 5. TPA3001 The sound power amplifier TPA3001 Class D AMP is the high effective D type of power amplifier of the single track. The BTL output power can reach 20W(10% THD+N) with 8-Ω speakers, +18V power supply, eliminating the need for heat sinks. The TPA3001D1 is available in the 24-pin thermally enhanced TSSOP package.

  • Page 28: Wiring Diagram

    Wiring diagram...

  • Page 29: Trouble Shooting

    Trouble shooting Before servicing please check to find the possible causes of the troubles according to the table below. 1.Antenna(signal): Picture is out of focus or jumping 6. Bad status in signal receiving 7. Poor signal 8. Check if there are failures with the electrical connector or the antenna.
  • Page 30 Symptoms Possible cause the signal types. Picture too bright and there is Check if the contrast setting is too high. distortion in the brightest area Possibly the output quality of DVD broadcaster is set too high. It maybe also due to improper terminal connection of the video frequency signal in a certain position of the system.

  • Page 31: Troubleshooting Guide

    Troubleshooting guide Begin Check power board , button board and power A red indicator cord lights? Yes, turn the unit on Check if the pin1 of X602 in data processing A blue indicator board is high level(+5V)? check V660/V661. lights? Check if the crystal in data processing board Display picture? starts, DDR clock is correct?
  • Page 32 (2) no picture, no sound No picture, no sound Check the color of indicator light Blue Check power Check the output voltage of board sockets X603/X606/X608 No sound No picture Power board problem Refer to (3) checking Refer to (4) checking procedure procedure (3) with picture but no sound...
  • Page 33 (4) with sound but no picture With sound but no picture Display OSD MENU? Display LOGO? If pin5 of X602 (IRR) has signal? 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 N108...
  • Page 34 (5) AV no picture Check if C155 and C156 input signals? Check if pin13 of N103 Check N104/N107 and the circuit outputs signals? from AV terminal to N103 Check the periphery circuit Check N103 and its from XC02 to N801 periphery circuit (6) S-terminal no picture Check if C123 and C157...
  • Page 35 (7) TV channel no picture Check if pin12 of TUNER241 output signals? Check if pin13 of N103 Check TUNER241 power supply outputs signals? and the peripheral circuit. Check the periphery circuit Check N103 from XC02 to N801 periphery circuit (8) DVB-T channel no picture Check if pin7/8 of TUNER241 output signals? Check if the crystal of...
  • Page 36 (9) YPrPb or YCrCb channel no picture Check if pin63/64/72/73 of NA05 output signals? Check if resistor rows RS72~RA74, Check the path from NB01, RA77~RA79 are well jointing NB02, NA50 to YPbPr Check NA50 and its periphery (10) D-sub channel no picture Check if pin52/65/80 of NA50 and pin105/108 output signals? Check if resistor rows RA72~RA74,...
  • Page 37 (11) HDMI channel no picture Check DETECT NA04 and its peripheral circuit? Check signals Check the connection to HDMI RA18~RA25 are normal? socket, NA04 and its peripheral circuit Check N801 peripheral circuit Note: N801 embeds FLASH, which stores HDCP information of HDMI, while EDID data stored in external EEPROM(NA02), so make sure the connection between HDMI socket/interface and the data of NA02 is well flash write, the picture and sound will display normally.
  • Page 38 Block diagram of 42” power board...
  • Page 39 Troubleshooting of 42” power board Instruction of system and time sequence control The whole system is composed of EMI, rectify, PFC, DC/DC and MCU. Therein MCU is the control core of the whole system. On the one hand, it controls ON/OFF time sequence of each voltage and the main AC voltage test.
  • Page 49 IR receiver board 667.PHIFC31-09 Power board 667.PH42FB6-20 Power filter board 667.PH42T8-51 Analog board 667.PS42FB6-53 Remote control 301.D42FB6-06 Panel 335.42014-00 PH-50FB31 Digital processing board 667.PHIFB31-69 Key board 667.PHIFC31-05 IR receiver board 667.PHIFC31-09 Power board 667.PHST18-20 Power filter board 667.50FB18-51 Analog board 667.50FB18-53...
  • Page 50 603-PH42FB31-12 Ver.1.0...

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