Attention: This service manual is only for service personnel to take reference with. Before servicing please read the following points carefully. Safety precautions 1. Instructions Be sure to switch off the power supply before replacing or welding any components inserting/plugging in connection wire Anti static measures to be taken (throughout the entire production process!): a) Do not touch here and there by hand at will;...
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would be unable to work and no way to get it repaired. If the connection wires, connectors or components fixed by the thermotropic glue need to disengage when service, please soak the thermotropic glue into the alcohol and then pull them out in case of damage.
Alignment instructions 1. Test equipment PM5518 (video signal generator) VG-849 (VGA and HDMI signal generator) CA210 (white balancer) 2 Alignment flow-chart The alignment flow-chart is shown as fig-1 Check DDC, HDCP KEY, FLASH and POWER control IC Factory initialization setup IF channel AFT voltage of TV and AGC voltage VGA, YPbPr ADC correction White balance adjustment...
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ADC PRESCALE Software auto preset according the power consumption SIF PRESCALE Software auto preset according the power consumption BACK LIGHT Software auto preset according the screen ALL COLOR 1: white balance of each channel auto offset based on the HDMI white balance 0: white balance of each channel adjust the offset base separately NO STANDY...
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4 Performance check 4.1 TV function Enter searching menu → auto search, connect RF-TV terminal with central signal source and check if the picture is normal, if there are channels be skipped. Check CCD and V-CHIP function for America. 4.2 AV/S, YPbPr terminals Input AV/S, YPbPr/YCbCr HD signal, check if it is normal.
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;...
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.
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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...
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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.
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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.
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2. Identification criteria for the bright spot and dark spot of the LCD screen Quantity allowed Distance between two spots Category Criteria 15" 20" 22" 30" 40" 15" 20" 22" 30" 40" One single ≤5 ≤2 ≤5 ≤2 ≤3 spot Bright ≥15mm spot...
3. Troubleshooting guide 3.1. 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 PIN3 of X301 on Check STANDBY circuit of...
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3.2. 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...
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3.3.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...
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APPENDIX-A: Main assembly AVL3210 MAIN COMPONENT AND IT'S NO. NAME NZ100 R2S10401 (5271040101) Analog board XI6HU0195310 MP7722DF (5277722001) Main board XI6HU0490110 MST9U88L (5270988001) Interface connection board XI6HU0214610 Key board XI6HU0130510 IR board XI6HU0220910 Power board XI6HU0212010 Remote control RC-Y46-0A XI6010Y04601...
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PART LIST OF EXPLODED VIEW DESCRIPTION Front cabinet Panel IR board Power board Interface connection board Speaker Key board Back cabinet Stand Main board Analog board User manual Remote control...
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PART LIST AVL3210 ver. REF.No. PARTS No. DESCRIPION Q'TY REMARK Front cabinet XI5QG26W019C Panel 1 CMO V320B1-L04 IR board XI6HU0220910 Power board XI6HU0212010 Interface connection board XI6HU0214610 XI6170682080 Speaker Key board XI6HU0130510 Back cabinet XI5HG26WH01D Stand XI6151064940 XI6HU0490110 Main board...