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Related Manuals for XOCECO LC-42HK35
Summary of Contents for XOCECO LC-42HK35
- Page 1 LCD TELEVISION LC-42HK35...
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Page 2: Table Of Contents
CONTENTS Safety precautions………………………………………………………………………..… Alignment instructions …………………………….…….………………………………… 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 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 damage.
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Page 5: Alignment Instructions
Alignment instructions 1. Test equipment PM5518 (video signal generator) VG-848 (VGA and HDMI signal generator) CA210 (color analyzer) 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 ADC correction of VGA, YPbPr White balance adjustment... - Page 6 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 adjust according the power consumption SIF PRESCALE adjust according the power consumption...
- Page 7 color bar(include back/white bars), enter submenu of ADC ADJ, select AUTOTUNE and wait for OK display. 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 3.2.2 c.
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Page 8: Working Principle Analysis Of The Unit
Working principle analysis of the unit The RF signal received by antenna will be sent to tuner TUNER601, then IF signal will be obtained through high amplified, mixed frequency. After pre-intermediate amplified by V602, it will be sent to acoustic surface-wave Z602 to do IF filter and get better IF characteristics, then it will be sent to N602 (R2S40401) to do intermediate amplification, phase-lock loop VCO and synchronous wave detection to get the composite video signal TV-CVBS;... -
Page 9: Block Diagram
Block diagram... -
Page 10: Ic Block Diagram
IC block diagram 1. MST9U89BL The MST9U89BL is a high performance and fully integrated IC for multi-function LCD monitor/TV with resolutions up to full HD (1920x1080). It is configured with an integrated triple-ADC/PLL, an integrated DVI/HDCP/HDMI receiver, a multi-standard TV video and audio decoder, two video de-interlacers, two scaling engines, the MStarACE-3 color engine, an on-screen display controller, an 8-bit MCU and a built-in output panel interface. - Page 11 2. R2S10401SP R2S10404SP is a semiconductor integrated circuit consisting of PLL split-carrier VIF/SIF signal processing system compliant with PAL.
- Page 12 3. TPA3120D2 The TPA3120D2 is a 20-W (per channel) efficient, Class-D audio power amplifier for driving stereo single ended speakers or mono bridge tied load. The TPA3120D2 can drive stereo speakers as low as 4Ω. The efficiency of the TPA3120D2 eliminates the need for an external heat sink when playing music.
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Page 14: Wiring Diagram
Wiring diagram power board main board connection board... - Page 15 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 16 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 17: Troubleshooting Guide
2. Troubleshooting guide 2.1. The panel doesn’t light Connect the power, check if the red indicator is light in STANDBY? Check if X403 PIN9 (5V) of Press POWER button on the main board is normal? unit or remote sensor control and check the indicator. - Page 18 2.2. Have back light, 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 channel is initialization EEPROM, no signal? Replace then turn off the TV,...
- Page 19 2.3. Have picture, but no sound Check if X203 on main board has signal output? Check if the relevant pins of the The speaker has problem. sound amplifier have square wave output? Check Check sound back-circuit of the amplifier has signal input sound amplifier through R201, R202? Check if N304 has...
- Page 28 APPENDIX-A: Main assembly 9242HK3511 MAIN COMPONENT AND IT'S NO. NAME N304 MST9U89 (5270989003) Main board 6HK0200110 N602 R2S10401 (5271040101) N203 TPA3120 (5273120001) AV connection board 6HK0094610 Key board 6HK0200510 IR board 6HU0380910 Power board 6HU0422010 Remote control RC-Y56 6010Y05600 V420H1-L11 Panel 5203428504...
- Page 29 9242HK3511 Ver.1.0...
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