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Sanyo LCD-37XR9SDA, Service Manual

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Sanyo LCD-37XR9SDA Service Manual Download Page 24

22 

2.2. Backlight, but no picture 

 
 
 
 
 
 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Check if the unit button 
and remote control 
operation? 

Check if all channels
have no signal? 

Replace 
main board 

Enter factory-menu, 
initialization EEPROM, 
then turn off the TV, 
turn on again, display 
picture? 

Adjust main board

again 

Replace main 

board 

no 

yes 

yes 

no 

yes

Does display OSD
menu on screen when
press menu button? 

yes

no 

no 

Summary of Contents for LCD-37XR9SDA

Page 1: ...LCD TV SERVICE MANUAL PRODUCT CODE No REFERENCE No SM0915073 1 682 348 16 PAL BG TV DTV FILE NO PRODUCT CODE No LCD 37XR9SDA ...

Page 2: ...ware 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 11 12 13 18 19 24 Removing or Installing the Stand Wall mounting instructions ...

Page 3: ... will result 2 5 If any foreign substance such as water liquid metal slices or other matters happens to fall into the module be sure to cut the 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 on...

Page 4: ...20 85 Scope for storage 10 90 2 13 Display of a fixed picture for a long time may result in appearance of picture residue 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 dis...

Page 5: ...of X808 X808 Pin1 2 3 4 5 6 7 8 9 10 11 12 13 Voltage 5 4 5 6 V 3 2 3 4V 0 11 4 12 6 V 0 31 4 32 6V 4 85 5 35 V 0 4 85 5 35V 0 2 5V b Test the pin voltage of XV03 the data is shown in table2 Table2 voltage data of XV03 XV03 Pin1 2 3 4 5 Voltage 23 8 25 2V 0 3 Alignment flow chart The alignment flow chart is shown as fig 1 Check if DDC HDCP KEY FLASH are written Connect to the center signal source ...

Page 6: ...en preset ex factory unless the client appointed it k ISP Mode ON soft upgrading through VGA port with ISP device OFF DDC function of VGA the setting will not be memory and will be OFF when power on again l REST ALL initialization of the factory and user data after this item is confirm the unit will restart and display the guiding image m Factory Data Reset factory data initialization including wh...

Page 7: ... in YPbPr channel a Switch to YPbPr channel b Press SOURCE then press 2 5 8 0 in turn to enter the level one factory menu c Move the cursor to ADC ADJUST and press OK to enter the sub menu d Input YPbPr signal VG 848 Timing 978 483P Pattern 984 SMPTE Color Bar Move the cursor to mode press CH and CH to select YPbPr HD move the cursor to AUTO ADC and press ENTER to adjust automatically till complet...

Page 8: ... Y coordinate data while lower G gun to decrease the data G gun adjustment will affect Y and Lv greatly 5 Performance check 5 1 TV function Connect RF to the center signal source enter Channel menu auto search check if there are channels be skipped check if the picture and speaker are normal 5 2 AV S Video terminals Input AV S Video signal check if the picture and sound are normal 5 3 YPbPr YcbCr ...

Page 9: ...79 60 317 40 VESA 7 800X600 48 077 72 188 50 VESA 8 800X600 46 875 75 49 5 VESA 9 1024X768 48 363 60 004 65 VESA 10 1024X768 56 476 70 069 75 VESA 11 1024X768 60 023 75 029 78 75 VESA 12 1152X864 67 5 75 108 VESA 13 1280X960 60 60 108 VESA 14 1280X1024 63 98 60 02 108 VESA 15 1280X1024 80 75 135 SXGA 16 1440X900 60 17 1680X1050 60 18 1360X768 47 7 60 85 5 5 5 HDMI terminal Input HDMI signal VG849 ...

Page 10: ...Yes NA04 5272402002 AT24C02 HDMI EDID Yes NA08 5272402002 AT24C02 HDMI EDID Australia only Yes N107 5272421002 AT24LC21A VGA EDID Yes Written with device like ALL11 Note1 write protect setting enter ALL 100 interface select Config and press config setting set Protect to All Protect select config when writing The write protect will be set again when ALL 100 program restart Note2 software writing an...

Page 11: ... example as shown in fig3 Fig3 the written file 4 Click Auto select All chip program and other items as shown if fig4 Fig4 selected items 5 Press Run in fig4 to begin writing and there are two steps Erase and Program 6 If the process of writing succeeds it will display Pass near Run as shown in fig5 ...

Page 12: ...SB device 3 Insert the USB device to USB port of the unit power on and select RF ATV channel begin USB upgrade after OSD disappear It will display blue when read the data from USB device while display red when write Flash The flash must be pull out when display red It will flicker in red and blue if the process of writing is abnormal 4 The method are not applicable to all the USB devices try anoth...

Page 13: ...or panel display HD audio signal via decoder built in MSD109 resumed to multi channel sound of Dolby AC 3 The audio signal will be sent to back end to perform bass adjustment and volume control then it will separate into L R channels and input to earphone amplifier BH3547F amplifying then output two ways One way will be sent to earphone another way will be sent to digital sound amplifier R2A15112F...

Page 14: ...er control IC MSD109 to digital decode image scale and OSD superposition then output LVDS drive level for panel display HDMI audio signal via decoder built in MSD109 is fed to back end to bass adjust and volume control the sound will separate into L R channels and input to earphone amplifier BH3547F amplifying then output two ways One way will be sent to earphone another way will be sent to digita...

Page 15: ...Supports HDTV RGB YPbPr YCbCr Supports Composite Sync and SOG Sync on Green separator Automatic color calibration DVI HDCP HDMI input ports Supports up to 225MHz 1080P 60Hz with 12 bit deep color resolution High bandwidth Digital Content Protection HDCP 1 1 compliant receiver High Definition Multimedia Interface HDMI 1 3 compliant receiver with CEC Consumer Electronics Control support Video Proces...

Page 16: ...th SAW and supports demodulation of 6MHz 7MHz and 8MHz 2K 8K carrier and supports both serial and parallel TS stream output 3 R2A10406NP VIF frequency corresponds to 38 9MHz SIF frequency corresponds to M N B G I D K and SECAM L L I2CBUS control ...

Page 17: ...15 4 PS321 The chip supports both I2C control and I O control mode supports both internal and external EDIT 5 R2A15112FP ...

Page 18: ...16 6 TD1616 ...

Page 19: ...17 ...

Page 20: ...18 Wiring diagram ...

Page 21: ...nterfered by other equipment and 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 indica...

Page 22: ...ot work properly Check if the 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...

Page 23: ...k STANDBY circuit of power supply board Press POWER button on the unit or sensor control and check the indicator Check if the PIN1 of X808 on main board is high level Check if the PIN13 of X808 on main board is high level Check power supply board Check power board and back light board yes no no red blue yes Check the backlight control circuit on the main board no yes ...

Page 24: ...ration Check if all channels have no signal Replace main board Enter factory menu initialization EEPROM then turn off the TV turn on again display picture Adjust main board again Replace main board no yes yes no yes Does display OSD menu on screen when press menu button yes no no ...

Page 25: ... board Is there sound in earphone Is there sound when touch CV04 CV05 with probe Check earphone amplify circuit Replace NV02 Check the audio output circuit of the main IC no yes no yes yes yes no Check if NV02 pin10 27 are high voltage If NS01 pin126 148 are low voltage no Check the path between NS01 pin 126 148 and NV02 pin10 27 Replace NS01 ...

Page 26: ...10n GND D SCL 007 A4 SDA 007 A4 SDA 007 A4 SCL 007 A4 1 8V_DE 1 8V_CORE 1 8V_DE 1 8V_PDE CJ11 2 2u GND D CJ12 4 7u GND D 1 8V_ADE 1 8V_DE CJ13 4 7u GND D TUNER_SDA L104 STBL2012 501 LJ01 LJ02 LJ03 1 8V_CORE C106 470u 10V CJ14 100n CJ21 100n CJ23 100n CJ15 100n CJ19 100n CJ25 100n CJ17 100n CJ18 100n CJ16 100n C104 22u 50V C116 220u 10V C128 10u 16V RJ09 0 GND D C132 100u 16V C130 100u 10V 1 8V_PDE...

Page 27: ...AUL2 62 AUR2 63 AUL3 64 AUR3 67 AUVRM 68 AUVRP 69 AUVAG 65 AUCOM 222 I2S_IN_BCK 221 I2S_IN_WS 223 I2S_IN_SD 224 SPDIFI 71 AUOUTL2 72 AUOUTR2 73 AUOUTL1 74 AUOUTR1 75 AUOUTL0 76 AUOUTR0 225 I2S_OUT_MCK 230 I2S_OUT_BCK 226 I2S_OUT_WS 231 I2S_OUT_SD 233 I2S_OUT_MUTE CEC 232 SPDIFO C173 2 2u C174 2 2u C169 2 2n C166 2 2n C170 2 2n C164 2 2n 9V X110 HJR 03A OR C231 100n R271 120 ISP_EN ISP_EN V113 BC84...

Page 28: ...D D R258 120 R259 390 R257 470 R262 75 V111 MMBT3904 GND D 5V GND D 5V_PI 5V_PI 5V L115 STPB2012 201PT GND D C205 1n C209 1n R256 15K R255 30K R240 33K R244 33K R246 33K R242 33K R238 33K R248 33K R249 33K R239 33K R241 33K R245 33K R243 33K R247 33K R261 47 4052_SEL 007 C4 C219 100n C228 100n C217 100u 24 BIN1P 25 SOGIN1 26 GIN1P 27 RIN1P 28 BINM 29 BIN0P 30 GINM 31 GIN0P 32 SOGIN0 33 RINM 34 RIN...

Page 29: ..._WEZ CS16 4 7u CS15 4 7u CS02 100n CS01 1n RS02 1K RS01 1K GND D GND D GND D GND D GND D GND D GND D GND D GND D RS12 22 RS13 22 RS31 22 RS32 22 CS18 100n CS19 100n CS21 100n CS23 100n CS20 100n CS22 100n CS17 100n CS07 100n CS03 100n CS05 100n CS14 100n CS12 100n CS10 100n CS08 100n CS13 100n CS04 100n 2 5V_ADDR CS24 100n 197 MDATA31 198 MDATA30 200 MDATA29 201 MDATA28 202 MDATA27 203 MDATA26 205...

Page 30: ... GND D GND D GND D GND D GND D GND D GND D GND D GND D GND D GND D GND D GND D CJ29 100u 10V CJ30 100n 3 3V LJ04 STPB2012 201PT CS28 470u 10V PVDD PANEL_ON OFF 006 G5 L803 BG2012D151T L805 STPB3216 121 3 3V_VD R813 4 7K 3 3V_VD R809 4 7K C822 100u 10V N803 AS1117 3V3 IN OUT C821 100n C815 100n 5V_STB GND D C846 100n C842 100n C856 100n C848 100n C838 100n C834 100n C852 100n C835 100n C860 100n C8...

Page 31: ... 100 R401 33 R408 4 7K R403 33 R409 100 GND D R410 100 HDMI_SINK_RX2 HDMI_SINK_CLK GND D PVDD HDMI_SINK_RX0 V401 BC847AW R411 47K HDMI_SINK_RX1 12V R404 33 R402 33 R405 33 HDMI_SINK_RX2 V402 BC847AW L401 STPB3216 310 HDMI_SINK_CLK HDMI_SINK_RX0 HDMI_SINK_RX1 PANEL_ON OFF 002 E4 GND D R819 22 GND D C868 100n R818 22 5V 3 3V_HDMI R817 GND D 3 3V_HDMI R418 10K R419 10K R416 10K R417 10K R406 33 PVDD ...

Page 32: ...008 C5 PH_DECT 008 F5 FLASH1_WP 3 3V_VD R824 100 R823 100 3 3V_VD CI_VS1 STANDBY_AMP 008 C1 USB_OC 007 E6 R837 1K GND D GND D R846 0 R847 0 3 3V_VD 3 3V_VD 3 3V_VD 3 3V_VD 3 3V_VD 3 3V_VD 5V_STB C874 1n GND D MUTE_AMP 008 C3 LED1 005 B3 C869 100n R828 1K 3 3V_VD 90 TS0CLK 80 TS0DATA0 81 TS0DATA1 82 TS0DATA2 83 TS0DATA3 84 TS0DATA4 85 TS0DATA5 86 TS0DATA6 87 TS0DATA7 88 TS0VALID 89 TS0SYNC 192 TS1C...

Page 33: ...8 CV15 1u CV22 100n CV29 100n CV26 470n CV24 10u DV04 LL4148 CV12 1u XV03 TJC3 05A 1 2 3 4 5 CV18 100n CV16 100n 24V AMP CV06 100n CV09 10u CV01 100n XV02 TJC3 04A 1 2 3 4 MUTE_AMP 002 A5 RV05 4 7K VV01 BC847AW 24V AMP STANDBY_AMP 007 C3 VV02 BC857AW CV23 100n GND D RV09 10K GND S 24V AMP 24V AMP CV11 10u GND S GND D CV30 1000u 35V GND S LV06 LSDL 035 CV17 100n CV14 1u RV03 3K RV07 2 4K RV10 6 8K ...

Page 34: ...6 100 C903 22uF 10V X902 1 2 3 4 5 X901 1 2 3 4 3 3V N901 ISL29001 1 VDD 2 GND 3 REXT 4 PD 5 SCL 6 SDA R901 100K GND GND 3 3V R907 100 R905 510 N902 HRM538BB5117 Vout GND Vcc R903 47 C904 100n GND GND R908 2 7K R909 2 7K C902 100n R904 510 R902 3 3K LED901 HFT503MPBR 1 R B 3 3V GND GND GND V901 BC847AW MENU VOL VOL POWER CH CH SOURCE VCC GND GND ...

Page 35: ...power board ...

Page 36: ...1 R2A10406NP 5271040601 CE6353 5276353001 PS321TQF 5270321001 R2A15112FP 5271511201 IR board XI635HE00300 Key board XI635HE00200 Power board XI6HE0402010 Remote control XI6010J017A1 Panel XI5203375501 APPENDIX A Main assembly LCD 37XR9SDA MAIN COMPONENT AND IT S NO RC J17 0A V370B1 L01 ...

Page 37: ......

Page 38: ...T LIST OF EXPLODED VIEW NO DESCRIPTION 1 Front cabinet 2 IR board 3 Panel 4 Key board 5 Speaker 6 Back cabinet 7 Stand 8 Power switch 9 Power board 10 Data processing board 11 User manual 12 Remote Control ...

Page 39: ...8 XI5293000042 Power switch 1 9 XI6HE0402010 Power board 1 10 XI6HE04069B0 Data processing board 1 11 XI5944035970 User manual 1 12 XI6010J017A1 Remote Control 1 Only the parts in above list are used for repairing Other parts except the above parts can t be supplied Components No Panel model logic board 55 37 XI60Z0000600 CMO V370B1 L01 back light board 19 37 XI60Z0000601 CMO V370B1 L01 Note speci...

Page 40: ...he stand unplug the ACpower cord You must install your TV into the stand in order for it to stand upright on a cabinet or other flat surface If you intend to mount your TV on a wall or other vertical surface you must remove the stand column 1 Remove the stand from the box and place it on a table or bench You must pay attention to the direction of the stand The wide portion of the stand should go t...

Page 41: ... soft cushion or cloth so that your TV is not scratched 2 Remove the four screws holding the stand column to your TV then remove the stand column Stand column NOTE The appearance of this product in these illustrations may differ from your actual product and is for comparative purposes only Remove four screws ...

Page 42: ...ctor to the rear of the display unit Caution the direction of the connectors should be strictly confirm to the diagram illustrated above 5 Put the back of the display unit close to the wall mounting holder insert the four wall mounting connectors into the four calabash shaped holes on the wall mounting holder Fig 5 Take out these parts from the box Wall Mounting Holder Expansion Bolt Wood Screw Co...

Page 43: ...Sep 2009 ...

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