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XOCECO LC-19HU5610UAE, Руководство по обслуживанию

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3 

Alignment instructions

 

 

1. Test equipment 

PM5518 (video signal generator) 

VG-848 (VGA, HDMI signal generator) 

VG-849 (digital video signal generator) 

CA210 (color analyzer) 

2. Power test 

Connect main board, power board and IR board according to the wiring diagram, connect the power 

and press “standby” to turn on the TV. 

Measure the pin voltage of XB1, the data is shown in table1: 

 

Table1 voltage data of XB1 

XB1 Pin1 

Pin2/4/7/8/13 Pin3 

Pin5/6 

Pin12 

LC-19HUXX 

4.75 V

～

5.25 V 

GND 

4.75 V

～

5.25 V 

11.4 V

～

12.6 V 

28.8 V

～

35.2 V 

LC-22HUXX 

4.75 V

～

5.25 V 

GND 

4.75 V

～

5.25 V 

11.4 V

～

12.6 V 

28.8 V

～

35.2 V 

 

3. Alignment flow-chart 

The alignment 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 for entering factory menu:

 press “INPUT”, “2”, “5”, ”8” and “0” in turn to enter factory 

menu; press “CH+” and “CH-” to select adjustment items and press “VOL+” and “VOL-” to adjust 

value items, press “MENU” repeatedly to exit. 

Method for software upgrading:

 

When software upgrading please enter factory menu first, select 

ISP from OPTION, set ISP to 1 and you can begin to upgrade. After upgrade finished, it needs to set 

Check DDC, FLASH, HDCP and power control IC 

Factory initialization setup 

IF channel AFT voltage of TV and AGC voltage adjustment 

White balance adjustment 

Combined test for general assembly 

Performance check 

Preset ex-factory 

Содержание LC-19HU5610UAE

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

Страница 2: ...instructions 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 B Exploded View 1 3 7 13 14 15 19 20 25 ...

Страница 3: ...e 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 or sound from the module please shut the power off at once Likewise if the screen is not working after the power is on or in the course of operation the power must be cut off immediately and no more...

Страница 4: ...e 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 picture for a period of time several minutes But when operating it please avoid displaying still picture in high brightness for a long time 3 Points for attention during installation 3 1 The front panel ...

Страница 5: ...nt 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 for entering factory menu press INPUT 2 5 8 and 0 in turn to enter factory menu press CH and CH to select adjustment items and press VOL and VOL to adjust value items press MENU repeatedly to exit Met...

Страница 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 of 60dBuv to RF terminal adjust R64 to value 3 75 V 0 25 V of TP4 and there should be no obvious snowy picture Increase the signal to 90dBuv and it should be display normally and no obvious noise 4 ...

Страница 7: ...5 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 the ON OFF timer sleep timer picture sound mode OSD freeze mute stereo etc 5 6 Presetting before ex factory 6 Software instruction Software instruction No Code No Type Function Flash written before ...

Страница 8: ...ished 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 If use Mstar on line burn in tool 6 2 2 1 Open the tool click Device a Select WP Pin pull to high during ISP b Select New Setting Below c Select Status Register Bit2 Bit3 Bit4 Bit7 Now write protecti...

Страница 9: ...e 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 wires and the upgrade instrument are connected well before the software written and then power on the TV 2 Double click the icon ISP_TOOL to open it 3 Press Connect to connect TV if the connection is...

Страница 10: ...ection 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 document needed to write in the Read check box ...

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

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

Страница 13: ...se 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 the program till it is success ...

Страница 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 speed so it need to select a suitable speed according the PC Step 1 Step 2 ...

Страница 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 R will be sent to MST9E19B The main chip NS2 MST9E19B is a high performance and fully integrated IC which can realize video demodulating video switch selection A D and D A conversion interlace progre...

Страница 16: ...SCART1 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 TDA4470 2 AMP SAW PRE AMP PRE AMP LM358D EDID 24C02 KEY 24C02 14 ...

Страница 17: ...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 To further reduce system costs the MST9E19A also integrates intelligent power management control capability for green mode requirements and spread spectrum suppo...

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

Страница 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 modulation e g L standard and the AM FM NICAM sound IF signals ...

Страница 20: ...18 ...

Страница 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 ...

Страница 22: ...nd 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 the power plug has been inserted properly into the socket No picture and sound Check to see if the power supply of liquid crystal TV has been switched on As can be indicated by the red LED at the fron...

Страница 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 Check if the remote control signal receiving window is exposed to strong fluorescence No picture and sound but only hash Check if the antenna cable is correctly connected or if it has received the video...

Страница 24: ...DBY 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 board is low level Check power supply board Check back light board yes no no red blue no yes Check NS2 and its peripheral circuit no yes Check N801 and its peripheral circuit ...

Страница 25: ...cture 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 and its periphery Check N3 and its periphery no yes yes VGA YPBPR SCART HDMI TV yes no no no yes Check if the OSD menu can be displayed normally after pressing MENU yes no yes no Check if TP1 on the ...

Страница 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 its periphery Check N3 and its periphery no yes no yes yes yes no no ...

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

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

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

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

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

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

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

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

Страница 35: ...oard 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 Remote Control 6010N03401 RC N34 0A Display Panel 5203195201 CLAA185WA02 33 ...

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

Страница 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 main board frame 21 EVA adhesive tape PART LIST OF EXPLODED VIEW Note design and specifications are subject to change without notice 35 ...

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

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