XOCECO LC-19HU56S, Service Manual

Page 1: ...LCD TELEVISION LC 19HU56S...

Page 2: ...nstructions Method of software upgrading Working principle analysis of the unit Block diagram IC block diagram Wiring diagram Troubleshooting guide Schematic diagram APPENDIX A Assembly list APPENDIX...

Page 3: ...power off immediately and do not move anything on the module lest it should cause fire or electric shock due to contact with the high voltage or short circuit 2 6 Should there be smoke abnormal smell...

Page 4: ...on the screen as commonly called ghost shadow The extent of the residual picture varies with the maker of LCD screen This phenomenon doesn t represent failure This ghost shadow may remain in the pict...

Page 5: ...t flow chart is shown as fig 1 Fig 1 Alignment flow chart 4 Alignment instruction 4 1 Unit adjustments Connect all the boards according to wiring diagram then power on and observe the display Method f...

Page 6: ...1 25V of TP2 Enter factory menu adjust TDA4470 from BG to LL input 33 9MHz SECAM signal of 80dB adjust R71 to value 1 25V of TP2 then solder J1 4 3 2 IF AGC adjustment Input 184 25MHz PAL BG RF signal...

Page 7: ...3 VGA terminal Insert VGA terminal input VGA format signal of 640x480 60 Hz and check if the display is normal 5 4 Check sound channel Check the speaker of each channel 5 5 Other function check Check...

Page 8: ...shed Every time when exit from ALL 100 burn in program if want to enter again the above two steps setting must be done again If SRWD item is not available please upgrade ALL 100 burn in program 6 2 2...

Page 9: ...15 pins the parallel cable connects the PC and the upgrade instrument the VGA cable connects the TV and the upgrade instrument 2 The steps for upgrading software 1 Please confirm that the connection...

Page 10: ...ction wires and check if ISP item of the factory menu is set to 1 if not please set it to 1 4 After connection is done it needs to read the Binary document Press Read as shown below 5 Search the docum...

Page 11: ...9 6 Select the document then the window will appear as shown below Select...

Page 12: ...10 7 Press Auto to select the writing function Select the items shown in the picture above a Read File...

Page 13: ...e Device e File Area 8 Press Run to begin the writing program wait till the blue bar is complete After writing it will display OK If there is error appeared shown as below press Run again to rewrite t...

Page 14: ...writing process Note2 the writing speed can be adjusted as shown below Select Config then adjust Speed BAR the value is bigger the speed is faster But it is easier to appear error when increase the sp...

Page 15: ...of AV VGA and HDMI will be sent to MST9E19B too Video signal of YPbPr and Video RGB of SCART1 via video switch N5 PI5V330 will be sent to MST9E19B Video signal V CVBS of SCART1 YPbPr L R and SCART1 L...

Page 16: ...CART1 L R L R AV L R VGA L R YPbPr L R TUNER TV SIF TV V SCART1 V OUT TV L R SCART1 L R OUT HDTV SW PI5V330 LCD TV CONTROLLER MST9E19B AUDIO AMP TDA7266SA EEPROM FLASH PANEL SPEAKER EDID 24C02 IF AMP...

Page 17: ...DC 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...

Page 18: ...16 2 TDA7266SA The TDA7266SA is a dual bridge amplifier...

Page 19: ...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 modul...

Page 20: ...18...

Page 21: ...Wiring Diagram Back light Board Power Board IR Board Key Board Speaker Main Board 30 pin 13 pin 7 pin 4 pin Pin Insert Pin Tuner Board 19...

Page 22: ...d if interfered possibly by the equipment like transmitting antenna non professional radio station and cellular phone 1 2 TV set Symptoms Possible cause Unable to switch the power on Check to see if t...

Page 23: ...batteries are installed in the reverse order Check if the battery is effective Check the distance or angle from the monitor Check if there is any obstruct between the remote control and the TV set Che...

Page 24: ...BY circuit of power supply board Press POWER button on the unit or remote control and check the indicator Check if the PIN 9 10 of XS11 on main board is high level Check if the PIN 11 of XS11 on main...

Page 25: ...ture appears Adjust main board again Which channel has no signal Replace main board Check if TP1 on the TV board has 1VPP signal or noise Check if output IF signal of TUN1 pin 11 is normal Check TUN1...

Page 26: ...of NV12 is normal Check power supply Check the waveform of PIN 4 12 of NV12 Check N3 PIN 24 waveform Check TUN1 PIN 11 waveform Check TUN1 and its periphery Check NV12 and its periphery Check NS2 and...

Page 27: ...Main Board Schematic diagrams Page 1 total 8 pages 25...

Page 28: ...Main Board Schematic diagrams Page 2 total 8 pages 26...

Page 29: ...Main Board Schematic diagrams Page 3 total 8 pages 27...

Page 30: ...Main Board Schematic diagrams Page 4 total 8 pages 28...

Page 31: ...Tuner Board Schematic diagrams Page 5 total 8 pages 29...

Page 32: ...IR Key Board Schematic diagrams Page 6 total 8 pages 30...

Page 33: ...Power Board Schematic diagrams Page 7 total 8 pages 31...

Page 34: ...Back light Board Schematic diagrams Page 8 total 8 pages 32...

Page 35: ...ard 6HU0885510 N3 TDA4470 5274470001 Main Board 6HU0880110 NS2 MST9E19B 5270919002 NV12 TDA7266SA 5277266001 Key Board 6HU08805A0 IR Board 6HC0060910 Back Light Board 6LV0261410 Power Board 6HU0822010...

Page 36: ...APPENDIX B Exploded view LC 19X56 34...

Page 37: ...8 main board 9 interface baffle 10 wall mounting bracket 11 screw 12 back cabinet 13 stand 14 screw 15 power switch bracket 16 conductive interleaver 17 key board 18 backlight board 19 power board 20...

Page 38: ...9219HU5610 Ver 1 0...