Related Manuals for Sanyo LCD-19XR7
Summary of Contents for Sanyo LCD-19XR7
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Page 1: Service Manual
FILE NO. LCD-19XR7 SERVICE MANUAL PRODUCT CODE No. 1 682 343 87: PAL/SECAM LCD-20XR7 LCD TV PRODUCT CODE No. 1 682 343 88: SANYO INDIA REFERENCE No.: SM0915015... -
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
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;... - Page 4 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 dagame.
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Page 5: Adjustment Instruction
Alignment instructions 1. Test equipment PM5518 (video signal generator) VG-848 (VGA and HDMI signal generator) CA210 (white balancer) 2 Alignment flow-chart The alignment flow-chart is shown as fig-1 Check DDC, FLASH and POWER control IC Combined test for general assembly Factory initialization setup IF channel AFT voltage of TV and AGC voltage White balance adjustment... -
Page 6: Software Upgrade
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 EEPROM-MEMORAY > EEPROM Initialization (operate when EEPROM data chaos) RECALL 3.2 Adjustment for AFT voltage and AGC voltage of IF channel in TV 3.2.1 IF AFT adjustment... - Page 7 5 Performance check 5.1 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 TXT and parental control. 5.2 AV, YPbPr terminals Input AV/S, YPbPr/YCbCr HD signal, check if it is normal.
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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 V15, then it will be sent to acoustic surface-wave Z17 to do IF filter and get better IF characteristics, then it will be sent to N3 (TDA4470) to do intermediate amplification, phase-locked loop VCO and synchronous wave detection to get video signal TV-V;... -
Page 9: Block Diagram
Block diagram POWER MEG. ATMEG8L EDID 24C02 FLASH YPbPr HDTV SW. EEPROM PI5V330 SCART1-RGB LCD TV CONTROLLER SCART1-V SCART1-L/R PANEL MST9E19A L/R-VGA L/R-YPbPr PRE AMP TUNER PRE AMP LM358D AUDIO AMP. R2S15102NP TV-SIF IF AMP TV-V TDA4470 SPEAKER 2*AMP SCART1-V OUT PRE AMP TV-L/R SCART1-L/R OUT... -
Page 10: Ic Block Diagram
IC block diagram 1. MST9E19A The MST9E19A is a high performance and fully integrated IC for multi-function LDC monitor/TV with resolutions up to SXGA(1280X1024)/WXGA+(1440X900). 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 2. R2S15102NP R2S15102NP is a Digital Power Amplifier IC developed for TV. R2S15102NP can realize maximum Power 10W X 2ch. (VD=24V, THD=10%, SE) at 8Ω load. It is possible to replace from the conventional analog amplifier system to the digital amplifier system easily.
- Page 13 3. TDA4470 The TDA4470 is an integrated bipolar circuit for multi-standard video/sound IF(VIF/SIF) signal processing in TV/VCR and multimedia applications. The circuit processed all TV video IF signals with negative modulation (e.g., B/G standard), positive modulation (e.g., L standard) and the AM, FM/NICAM sound IF signals.
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Page 15: Wiring Diagram
Wiring diagram key board IR board power board panel main board... -
Page 16: Trouble Shooting
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 17 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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Page 18: Troubleshooting Guide
3. Troubleshooting guide 3.1. No raster Turn-on power supply, check if the red indicator is light in the STANDBY? Check if XB1 PIN3(5V) of Press POWER button in the main board is normal? unit or sensor control and check the indicator. blue Check if the PIN9,10 of XB1 Check STANDBY circuit of... - Page 19 3.2. Raster, but no picture Check if the unit button Does display remote control menu in screen when operation? press menu button? Check channels have signal? VGA/YPRPB/SCART Enter factory-menu, Which is no signal initialization EEPROM, of channels Replace then turn off the TV, main board turn on again, display Replace...
- Page 20 3.3.no sound (TV input) Check if PIN2, 9,10 and Check PIN5 14 voltage of NV1 is PIN11 output wave of Check NV1 and its normal? periphery Check power supply Check PIN24 wave of Check NS2 and its periphery Check N3 and its Check PIN11 wave of periphery TUN1...
- Page 21 main board...
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Page 22: Schematic Diagram
main board... - Page 23 main board...
- Page 24 main board...
- Page 25 main board...
- Page 27 back light board...
- Page 28 APPENDIX-A: Main assembly LCD-19XR7 MAIN COMPONENT AND IT'S NO. NAME TDA4470 (5274470001) Main board XI6HU04601S0 MST9E19A (5270919001) R2S15102NP (5271510201) Key board XI6HU0050510 IR board XI6HU0050910 Backlight board XI6LY0121410 Power board XI6HU0042010 Remote control RC-Y35-0F XI6010Y03507 Panel M190A1-L02 XI5203196503...
- Page 30 PART LIST OF EXPLODED VIEW (LCD-19XR7) DESCRIPTION Screen Front cover Speaker Main board Back cabinet Stand Power switch Key board Back light board Power board Infrared receiving board User manual Remote Control...
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Page 31: Parts List
PARTS LIST LCD-19X R7 ver.1.0 R E F.No. PAR T S No. DE S C R IP T ION Q'T Y R E MAR K S creen C MO M190A1-L02 F ront C over XI5Q432R 0020 XI6170735020 S peaker(B ottom) XI6HU04601S 0 Main B oard XI5HP 32B H020...