Related Manuals for Sanyo LCD-42XR7H
Summary of Contents for Sanyo LCD-42XR7H
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Page 1: Service Manual
FILE NO. SERVICE MANUAL LCD-42XR7H PRODUCT CODE No. 1 682 344 04: PAL/SECAM LCD TV 1 682 344 14: SANYO India REFERENCE No.:SM0915009... -
Page 2: Table Of Contents
CONTENTS Safety Precautions………………………………………………………………………..… Alignment instructions. ………………………………….…………………………….… Software upgrade method…………………………………………….…………………… Block diagram……………………………………………………………………………… Working principle analysis of the unit……………………..……………………….…… IC block diagram……………………………………………………………..……………. Wiring diagram……………………………………………………………………………..… Troubleshooting………………………………………………………..…………….……. Schematic diagram………………………………………………………………………….. APPENDIX-A: Assembly list APPENDIX-B: Exploded view... -
Page 3: Safety Precautions
4Attention: 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: Alignment Instructions
Alignment instructions 1. Test equipment Digital Multimeter, SCART signal generator FLUKE54200, Oscillograph PC( FLASH writing program has to be installed firstly), VG848( VGA,YPBPR signal generator) CA210 (white balancer), DVD player with HDMI output, TV set with SCART terminal IF signal generator 2. - Page 6 Preset ex-factory Check the accessories and pack them in box Fig-1 adjustment flow-chart 3. Instruction on adjusting 3.1 Method of entering the factory menu The method of entering the factory menu is SOURCE, 2, 5, 8, 0. Press 1 to enter page1, the function is Cotez Feature Setting, to set LOGO, frequency ect,. Press 2 to enter page2, the function is Color Temperature Setting.
- Page 7 3.5.1 mode preset Input VG-848 of VGA signal(PATTERN 980:1 dot ON/OFF), select TIME877(720*400/70Hz), the TV will auto adjust to full screen, or enter display menu to do auto correction. Adjust TIME885(640*480/60Hz,TIME854(800*600/60Hz) by using the same method. 3.5.2 VGA channel Auto color Input VG848 of VISA mode signal to VGA channel, enter factory menu of Auto Color Setting item, select VGA and press enter to do Auto Color.
- Page 8 when SCART2 signal switches to YC format. d) Disconnect SCART signal, the unit should return to the present TV situation. Note: the function is act except VGA, YPBPR, HDMI. 4.5 VGA terminal Input VGA signal (VG-848 signal generator), separate input VGA format signal of table 1 and check if the picture and sound are normal after auto correction.
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Page 9: Method Of Software Upgrading
4.7 HDMI terminal Input HDMI signal (VG848 signal generator), separate input YPBPR format signal of table1 and table2 and check if the picture and sound are normal. Check the picture and sound by using VG849 with HDMI terminal. 4.8 DVT-T function check Connect DVB-T RF terminal to the central signal source, enter the search menu→... - Page 10 Properly set the path of RAMWrite "C:\isp_fastflash\Isp_parallel\TEMP_OBJECT\isptemp_ parallel.hex" and FastFlashWrite "C:\isp_fastflash\20y25.hex", save them and close. 4. Set the LCD to off. Connect the Y# updating board and PC with parallel cable. 5. Connect the VGA MONITOR interface on the Y# updating board with the VGA cable, connect the other end to the VGA interface of the LCD.
- Page 11 Click the icon of Set the Device to Parallel. Then click the item of Delays and Buffer Size:...
- Page 12 Set Long to 50000 ms. Click the item of Parallel: Set Clock to 120000 Hz...
- Page 13 7. Click Batch, Select the path of the File: bat.txt Select bat.txt and click to open it: Click “OK” to start the process of burning the program.
- Page 14 The following screen appears when the process if finished. If you want to update the software next time, you just need to click the pull-down menu to select the desired Batch file and execute it in the following screen.
- Page 15 Note: Do not cut off the power or turn off the unit during the burning process, or the flash may be damaged. Check the following if you fail to update: 1. Check whether all cables are properly connected. If LCD is turn on. 2.
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Page 16: Block Diagram
Block diagram... -
Page 17: Working Principle Analysis Of The Unit
Working principle analysis of the unit The unit has two modules: video module and sound module. The diagram is show as fig 1 and fig 2: Pre-IF IF IC Fig1 diagram of video module Fig2 diagram of sound module... - Page 18 1. Video module There are three kinds of terminal of SCALER FLI8548: A: 16 channel analog signal input B: one group 24BIT digital signal input C: one group HDMI digital signal input SCART1, SCART2, AV, DVB-T, TV input from terminal A; VGA, YPBPR via switch PI5V330 to ADC CAT9983, after CAT9983 processing output 24BIT DIGITAL DATA to terminal B;...
- Page 20 3. Sound module SGTV5830 Multistandard TV Audio Processor The diagram is below:...
- Page 21 Input pins: AIN3: AV L/R input AIN4: SCART2 L/R input AIN5: SCART1 L/R input AIN6: DVB L/R input AIN8: YPBPR L/R input AIN9: VGA L/R input I2SAIN: I2S input SIF1: SIF input SIF is directly sent to SGTV5830 ADC and sound demodulate module (stereo identify), then output to SSS(SOURCE SELECT SWITCH) to output selection.
- Page 22 via ADC and SSS switcher output MAIN-OUT. There is only one channel ADC, the signal can’t go through another channel HP. When AOUT0 act as HP OUT, it can use “Analog Input Switch” switch the sound of PIP to AOUT0 and use the earphone sound amplifier to control the volume. b) The reason why output to FLI8548 a signal of SYNC DELAY is that when process the picture and sound at the same time, the process of image is much more complex and needs more time, so they may no-sync.
- Page 24 Gain (V/V) Gain (dB) (KΩ) (KΩ) Remark 17.4 24.8 5.6nF 720KHz 15.0 6.8nF 660KHz MPS7722 18.3 3.3nF 660KHz MPS7722 21.5 6.8nF 660KHz MPS7722 17.4 24.8 3.3nF 660KHz MPS7722 15.0 8.2nF 670KHz MPS7722 18.3 5.6nF 720KHz MPS7722 11.9 21.5 8.2nF 670KHz MPS7722 17.4 24.8...
- Page 25 VGA and YPBPR via switch PI5V330 to CAT9983 D/A convert. CAT9983 has a 150M band width, three groups ADC with 8-bit MICROVISON, support YPBPR 1080P input. CAT9983 Note: pin COAST and CLAMP connected to ground for auto test.
- Page 26 7. Digital HDMI module Two groups HDMI via video switch IC FSHDMI04 to HDMI input port of FLI8548, which integrated HDMI reception and support digital 1080P input. FSHDMI04(with ESD) diagram is below: 8. FLI8545 system module Feature: 3D comb filter, support multi-system TV signal and MICROVISION Integrated triple 10-bit ADC.
- Page 28 9. Other Power control The unit adopts a PHILP power control IC, which works at standby and the power consumption below 1W, it also realizes the on time turn off/on.
- Page 29 DDR MEEORY The unit adopts 2 chips 16M*16bit DDR SGRAM of 200M speed, 32-bit of data and 12 bit of address. FLASH and EEPROM 1M*16-bit of FLASH and 64K bit of EEPROM 10. DAP module (include AVC, SRS, TONE CONTROL, EQ ect,.) DVB-T module output turner...
- Page 30 and sends to MPEG-2 decoder and analytic software to recover the digital information. Video decoder, audio D/A conversion: MPEG-2 decoder decompresses the audio/video signal, via video coder and audio D/A conversion, recovers analog audio/video signal to display the high quality image on the analog TV, it also provides multi-channel stereo programs. Inlaid CPU, memory module and interface circuit: inlaid CPU is heart of the DVB module, it and memory are used to store and run software.
- Page 31 2) pins instructions: ZR3915X is PQFP packing, 256 pins. Including: power, clock, Guest Bus, SDRAM interface, two TS stream inputs, 32 GPIO, two SmartCard, Modem V9.0, UART serial interface, controllable ADC and PWN interface, digital AUDIO interface, analog video output.
- Page 32 DDR MEEORY The unit adopts 2 chips 16M*16bit DDR SGRAM of 200M speed, 32-bit of data and 12 bit of address. FLASH and EEPROM 1M*16-bit of FLASH and 64K bit of EEPROM 10. DAP module (include AVC, SRS, TONE CONTROL, EQ ect,.) 11.
- Page 33 L6563 block diagram is below:...
- Page 34 TEA1610T block diagram is below:...
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Page 36: Wiring Diagram
Wiring diagram... -
Page 37: Troubleshooting
Trouble shooting Before servicing please check to find the possible causes of the troubles according to the table below. 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 38 Symptoms Possible cause the 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.
- Page 39 Troubleshooting guide 1. Trouble diagnosis of power No power Check if C539 Check N503 has 5V Check if C533 Check N501 and its periphery (include has voltage over transformer and the secondary sample 100V feedback circuit. Check the fore circuit of fuse and rectifier.
- Page 40 3. DTV part DTV fails to work properly Begin Check power supply of power board, if Switch to DTV and J06 pin1 is high level, check crystal of display picture DVB-T and frequency of SDRAM CLK Check if YUV of J03 DVB-T module Check if the picture of output is normal DTV or STAND-BY is...
- Page 41 ② DVB-T power supply abnormal DVB-T power supply abnormal Check the power supply of power board U10 pin4 should U7 pin4 should U6 pin4 should be 5V be 3.3V be 1.8V ③ main chip works abnormal Main chip of DVB-T works abnormal If work frequency of crystal Y1 is 20.25MHz...
- Page 42 Check if flash write the correct software ⑤ DTV can’t search the program DVB-T can’t search the program If tuner RF is well connected Check if RF receives program signal Check if each output pin of TS is normal Check if flash write the correct software ⑥...
- Page 43 Check if the speakers work normal at other channel Check if flash write the correct software 4. Representative symptoms no picture, no sound, no raster Check Check if +3.3V-stby of Power board no output or indicator light XB7 9# on main board +3.3V-stby short to the turns red when is normal...
- Page 44 with sound but no picture Check Check the power No backlight power supply backlight is light supply of backlight output or short to the ground LVDS power supply XB12 3# switch level is abnormal of C415 is normal? (such as shortage) N403 If X403 has LVDS wave Main...
- Page 45 b) TPA3001 audio amplifier Speaker output (X12, X13) If sound processing IC Audio amplifier and the circuit has problem. has output (C27, C29) Check the power supply, 6# MUTE. Turn on again after power off and check if the audio amplifier protection.
- Page 46 c) SCART1 no picture Check if X203 1#(CVBS) or 3#,4#,5#(RGB) SCART board has signal? NS02 or the circuit around The path from SCART1 SCART1 input has problem socket to X203 has problem d) SCART2 Check if X203 7# on SCART board has signal? NS02 or the circuit around The path from SCART2 SCART1 input has problem...
- Page 47 f) D-Sub no picture If it is normal when input YPbPr signal If RA20, RA21 input Check follow sync signal program (e) NA03 and its periphery If NB14 1#, 4# input has problem sync signal NB14 The path between VGA periphery has problem and NB14 has problem g) HDMI no picture...
- Page 54 IR KEY...
- Page 56 decode...
- Page 57 high frequency...
- Page 58 connection...
- Page 59 APPENDIX-A: Main assembly LCD-42XR7H NAME Power board XI6FN0052010 Main board XI6FY0050110 Connection board XI6FY0052910 Video processing board XI6FY0054010 Key board XI6FY0140510 IR board XI6FY0140910 SCART connection board XI6FY0144610 Remote control XI6010J01101 Panel XI5203428503...
- Page 61 PART LIST OF EXPLODED VIEW (LCD-42XR7H) DESCRIPTION Front cover Infrared receiving board Screen Analog board Main board Key board Speaker Power board Trans-connecting board Back cabinet Stand Power Switch User manual Remote Control...
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Page 62: Parts List
PARTS LIST LCD-42X R7H 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 F ront C over XI5Q232L002A Infrared R eceiving B oard XI6F Y 0140910 S creen C MO V 420H1-L07 XI6F Y 0050110 Main B oard...