PDP PH-42HU31 Service Manual

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PDP TELEVISION

PH-42HU31

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Summary of Contents for PDP PH-42HU31

Page 1 PDP TELEVISION PH-42HU31...
Page 2: Table Of Contents
CONTENTS Safety instructions………………………………………………………………………..… Adjustment instruction …………………………….…….…………………………….… working principle analysis……………………………….………….……………………. block diagram…………………………………..……………………….…………………. IC block diagram………………………………………………………………………..…… Wiring diagram ……………………………………………………………..……………... Troubleshooting guide ………………………………………………………………..…… Schematic diagram………………………………………………………………………….. APPENDIX-A: Assembly list APPENDIX-B: Exploded view...
Page 3: Safety Instructions
1.2 The operation voltage is approximately 350V for PDP module (including screen, driving circuit, logic circuit and power module). If you want to conduct maintenance work on PDP module when the set is in normal operation or just after the power is off, you must take proper measures to avoid electric shock and never have direct contact or touch with the circuitry of the working module or metal parts.
Page 4 1.10 There is 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.
Page 5: Adjustment Instruction
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. Please take care to keep it intact lest it should become a potential safety trouble.
Page 6 table1. Table1 sub-menu adjustment Items Preset Introduce HOTEL 1: HOTEL OPTION of factory menu is optional 0: HOTEL OPTION of factory menu is not optional LOGO 1: display LOGO in no signal or turn on 0: no LOGO display ADC PRESCALE Software auto preset according the power consumption SIF PRESCALE Software auto preset according the power consumption...
Page 7 PAT908 color bar(include back/white bar), enter submenu of ADC ADJ, select AUTOTUNE and wait for OK displaly. Input PAT920(8 gray levels), check if the white balance is normal, if not, set ALL COLOR to 0 and fine adjust according the method of 3.3.2 c.
Page 8: Working Principle Analysis
Working principle analysis of the unit The RF signal received by antenna will be sent to tuner TUN1, then IF signal will be obtained through high amplifier and mixed frequency, through pre-intermediate amplified by VZ100, then it will be sent to acoustic surface-wave ZZ101 to do IF filter and get better IF characteristics, then it will be sent to NZ100 (R2S1040) to do intermediate amplification, phase-locked loop VCO and synchronous wave detection to get video signal TV-CVBS;...
Page 9: Block Diagram
Block diagram TUNER EEPROM HDCP Serial flash Power I/O port controlMeg8 EDID HDMI Pre-IF EDID HD1/HD2 AV1/AV2/ MST9X88L TV-Video L/R-DVI/PC TV-SIF L/R-MUX L/R-HD1 2 multiple D class amplifier MPS7722 CS4344 video amplify Earphone amplifier L/R-HD2 4052 L/R-AV1 L/R-OUT VIDEO-OUT Earphone Speaker AV OUT L/RAV2...
Page 10: Ic Block Diagram
IC block diagram 1. MST9U88L The MST9U88L is a high performance and fully integrated IC for multi-function LDC monitor/TV with resolutions up to SXGA/WXGA. It is configured with an integrated triple-ADC/PLL, an integrated DVI/HDCP/HDMI receiver, a multi-standard TV video and audio decoder, a video de-interlacer, a scaling engine, the MStarACE-3 color engine, an on-screen display controller, an 8-bit MCU, and a built-in output panel interface.
Page 11 Pins description: 4, 5, 7, 8, 10, 11, 1, 2: HDMI input 16, 17: horizontal/vertical synchronous input 27, 25, 22: RGB input 30, 32, 35: YpbPr2 input 41, 44, 46: YpbPr1 input 48, 49: S-VIDEO input 54: AV1-V input 55: AV2-V input 57: TV-CVBS input 59: CVBS output(AVOUT-V) 71, 72: VGA-L/R input...
Page 13 Pin description: 1, 2: VIF input 10: TV-SIF output 23: SIF input 17: SDA 7: TV-CVBS output 18: SCL 3. MP7722DF The MP7722 is a stereo 20W Class D Audio Amplifier. It is one of MPS’second generation of fully integrated audio amplifiers which dramatically reduces solution size by integrating the following: 180mΩ...
Page 15 Pin description: 1, 7: L/R input 19, 14: L/R output 6, 10: mute control input...
Page 16: Wiring Diagram
Wiring diagram down down IF adjustment down...
Page 17 Trouble shooting 1. Fault clearance Before servicing please check to find the possible causes of the troubles according to the table below. 1.1 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.
Page 18 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 19: Troubleshooting Guide
2. Troubleshooting guide 2.1. No raster Turn-on power supply, check if the red indicator is light in the STANDBY? Check if X303 PIN3(5V) of Press POWER button on the main board is normal? unit or remote sensor control and check the indicator. blue Check if the PIN27of X304 on Check STANDBY circuit of...
Page 20 2.2. Raster, but no picture Check if the unit button Does display remote control menu in screen when operation? press menu button? Check if the all channels have no signal? HDMI/VGA/YPRPB Enter factory-menu, Which is no signal initialization EEPROM, of channels Replace then turn off the TV, main board...
Page 21 2.3.no sound (TV input) Check if PIN2, 8, 13 and Check PIN3 18 voltage of NA6 is PIN7 output wave of Replace NA6 normal? Check power board Check PIN10 wave of Replace NS4 NZ100 Replace NZ100 Check PIN11 wave of TUNER1 Replace TUNER1...
Page 31 APPENDIX-A: Main assembly NAME MAIN COMPONENT AND it’S NO. Analog board 667.HSHU31-53 NZ100 R2S10401 (353.10401-10) MP7722DF (353.77220-10) Main board 667.HIHU31-01 MST9U88L (353.09880-10) Trans-connection board 667.32HU25-46 Keypad board 667.S42HU31-05 IR receiver board 667.S42HU31-09 Power filter board 667.S42HU31-51 Power board 667.SIHU31-20 Remote control 301.Y37HU32-46 RC-Y46 Panel...
Page 32 603-PH42HU31-10 Ver.1.0...