Sanyo LCD-42XR7H Service Manual Download Page 41 | Manualshive

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39

②

DVB-T power supply abnormal

③

main chip works abnormal

④

DTV image abnormal

DVB-T power supply abnormal

Main chip of DVB-T
works abnormal

U10 pin4 should
be 5V

U7 pin4 should
be 3.3V

U6 pin4 should
be 1.8V

If work frequency of
crystal Y1 is 20.25MHz

The frequency of R15
should be 129.6MHz

Check if flash write
the correct software

Check the power supply of power board

DTV image of
DVB-T abnormal

Check if J03 wave of
video output is normal

The work frequency of crystal Y1
should be 20.25MHz, ±20ppm error

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Summary of Contents for LCD-42XR7H

Page 1: ...FILE NO LCD 42XR7H PRODUCT CODE No 1 682 344 04 PAL SECAM 1 682 344 14 SANYO India REFERENCE No SM0915009 SERVICE MANUAL LCD TV ...

Page 2: ...ment 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 1 3 7 14 15 16 32 33 46 ...

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 onc...

Page 4: ...0 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 disp...

Page 5: ...en check each function of TV such as station missing system identify analog control etc check the output of headphone and speaker Input SCART AV S signal then check each function of all the terminals Input HDMI signal check if the display is normal at HDMI1 and HDMI2 check sound and each function such as analog control etc Input VGA signal and check the display at PC status check each function suc...

Page 6: ...stment a Base on 3 3 a connect 6 pin wire of power board and X04 of TV board press POWER on the remote control now the indicator light of IR board turns blue TEST PIN2 of X04 to be 5V PIN4 9V L07 3 3V b Input 5V to TP1 and 0V to TP2 input 38 9m IF signal to J1 use IF signal generator adjust L10 to let X08 be 1 6V c Input 0V to TP1 and 5V to TP2 input 33 5m IF signal to J1 use IF signal generator a...

Page 7: ...l 4 2 SCART AV S terminal Input SCART1 RGB CVBS SCART2 CVBS YC AV S signal check if the picture and sound are normal 4 3 AUDIO OUT VIDEO OUT terminal Separate input signal at the status of TV SCART AV S connect AUDIO VIDEO OUT to the monitor and check if the sound and the picture of the AUDIO OUT are normal 4 4 SCART terminal 4 4 1 check the content of SCART OUTPUT Separate input signal at the sta...

Page 8: ...2 720X4843 60Hz 480P 978 3 702X574 50Hz 576i 969 4 756X557 50Hz 576P 979 5 1280X720 50Hz 720P 50 5 SET 6 1280X720 60Hz 720P 60 976 7 1920X1080 50Hz 1080i 50 1 SET 8 1920X1080 60Hz 1080i 60 972 9 1920X1080 50Hz 1080P 50 10 1920X1080 60Hz 1080P 60 970 No Resolution Picture element clock MHz H SYNC kHz V SYNC Hz Remark 1 640X480 60 885 25 175 31 47 59 94 2 640X480 72 851 31 500 37 86 85 08 3 640X480 ...

Page 9: ...x Method of software upgrading The FY series models enable you to update software through the serial interface Hardware requirements 1 One serial cable with female end and female end 2 One PC set Steps of software updating are as follows 1 Install Gprobe 5 0 The first Double click the GProbe5 1 0 0 15_S0006 EXE 09A to install it According to the prompt of Windows and follow the steps one by one to...

Page 10: ...ashWrite 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 6 Turn on the LCD Double click to run Gprobe5 ...

Page 11: ...9 Click the icon of Set the Device to Parallel Then click the item of Delays and Buffer Size ...

Page 12: ...10 Set Long to 50000 ms Click the item of Parallel Set Clock to 120000 Hz ...

Page 13: ...11 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: ...llowing 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: ...ocess 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 Check the settings of Gprobe 3 It is wrong if the Gprobe shows as the following icon Now just click the icon of to show below icon ...

Page 16: ...14 Block diagram ...

Page 17: ...orking 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 Fig1 diagram of video module Fig2 diagram of sound module SAW Pre IF IF IC ...

Page 18: ...cooperate to perform PIP each other The function of PIP can only realize by the signals input from the three terminals A B and C All the signals via FLI8548 processing to the panel directly the output interface is configurable for single wide TTL LVDS 18 24 or 30 bit RGB or dual wide TTL 18 24 bit RGB LVDS 18 24 or 30 bit RGB FY use the dual wide LVDS 30 bit RGB to support the 1080P panel 2 TV mod...

Page 19: ...17 ...

Page 20: ...18 3 Sound module SGTV5830 Multistandard TV Audio Processor The diagram is below ...

Page 21: ...to output to ADC then to SSS SOURCE SELECT SWITCH to output selection Output pins MAIN OUT MAIN OUT HP OUT TV OUT AOUT0 HP AOUT1 AV OUT AOUT2 SCART1 MONITOR OUT I2SA OUT I2S OUTPUT All of the sound signal via front processor to SSS switch the sound of main channel will output I2S OUT to FLI8548 as a signal of SYNC DELAY then sent back to SSS switch to SGTV5830 digital processing module DAP after p...

Page 22: ...al 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 When HDMI act as the main picture and occupy the I2S terminal SYNC DELAY is needless SGVT5830 output MAIN L R to sound amplifier MPS7722 then to speaker 4 Audio amplifier MPS7722 The MPS7722 is a dual ended 20W Class D Audio Amplifier with 2...

Page 23: ...21 ...

Page 24: ...4 7 6 8nF 660KHz 12 MPS7722 17 4 24 8 82 4 7 3 3nF 660KHz 12 MPS7722 5 6 15 0 56 10 8 2nF 670KHz 24 MPS7722 8 2 18 3 82 10 5 6nF 720KHz 24 MPS7722 11 9 21 5 56 4 7 8 2nF 670KHz 24 MPS7722 17 4 24 8 82 4 7 5 6nF 720KHz 24 MPS7722 33 0 30 4 330 10 1 8nF 700KHz 24 MPS7722 5 NJW1109 IN a b HP L R SCL SDA SCL_ 5V SDA_ 5V Out A B earphone output V 9V power supply 6 High definition module ...

Page 25: ...d 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: ...upport 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 HDMI receiver support 1080P input I2S output Built in MCU GPIP control ACC Adaptive Contrast and Color ACM Active Color Management DCDI Dynamic mode test ...

Page 27: ...25 ...

Page 28: ...26 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: ...an release interference data of transport layer and PES layer the output of demultiplexer is noninterference audio video PES Video PES is sent to ZR3915X demultiplexer then output MPEG 2 video data after decode the data is sent to PAL NTSC coder D A converting into video signal CVBS Y C R G B or Y Cr Cb output from video output circuit Audio PES is sent to audio decoder then output MPEG 2 audio da...

Page 30: ...eart of the DVB module it and memory are used to store and run software Control every hardware module Interface circuit provides plenty external interfaces including Guest Bust bus line general serial interface MODEN V90 interface RS 232 analog digital video audio and data interface ect Function of Supra TV ZR3915X DVB T module made up of ZR3915X first distils channel code information from transpo...

Page 31: ...5X 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: ...e way via standby circuit isolation D D convert FSDH321 output 5VAND 32V another way via semi bridge circuit TEA1610T output 24V 18V ect At standby power board send out Vsb 3 3V to cut off 5VSC 32VSC output by the control of Standby signal and stop working of PFC circuit L6563 and semi bridge TEA1610T When turn on it makes all the IC working and output voltage L1653 PFC power factor correct TEA161...

Page 33: ...31 L6563 block diagram is below ...

Page 34: ...32 TEA1610T block diagram is below ...

Page 35: ...33 ...

Page 36: ...ce control power supply of main board power supply board control main board key board upgrade board IR receive board TV board interface board to speaker power supply of audio amplifier power supply of TV board backlight power switch Wiring diagram 34 ...

Page 37: ...nterfered possibly by the equipment like transmitting antenna non professional radio station and cellular phone 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 front of the ...

Page 38: ...y 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 if it has rece...

Page 39: ...ircuit of fuse and rectifier No DC output Vsb normal Check 32VSC 5VSC No Check if Standby is high level Yes Check if 24VCF 24VSC 18VSC is normal Yes No Check N504 and the correlative circuit Yes Check the fore circuit No Check the correlative circuit Check if the voltage of C533 is about 395V less than 370V is abnormal Yes No Check L6563 and its periphery include the VCC Check N512 and its periphe...

Page 40: ...icture of DTV or STAND BY is normal Check if YUV of J03 DVB T module output is normal If DVB T program is normal Check if RF input signal is normal TS stream of TUNER has output Yes No Yes Yes No No No respondence when switch to DTV Check the power supply of DVB T J06 pin 1GPIO should be high level If main chip works normally If DTV image is normal Refer to checking procedure 2 Refer to checking p...

Page 41: ...d be 5V U7 pin4 should be 3 3V U6 pin4 should be 1 8V If work frequency of crystal Y1 is 20 25MHz The frequency of R15 should be 129 6MHz Check if flash write the correct software Check the power supply of power board DTV image of DVB T abnormal Check if J03 wave of video output is normal The work frequency of crystal Y1 should be 20 25MHz 20ppm error ...

Page 42: ... 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 DVB T no audio output If audio connection wire of DVB T is well Check if program setting is correct Check if each pin of J02 is normal ...

Page 43: ...put or 9V short to the ground IR board has problem Indicator light is damaged There is problem lie in IR board Check XB7 5V of 3 and 18V of 5 Check the power supply of main CPU DDR CB47 3 3V CS80 1 8V C434 2 5V NB10 NS03 N404 and their periphery have problem Main CPU NS02 DDR N400 N402 FLASH NA02 or their periphery have problem Power board no output or 5V 18V short to the ground Yes No No Yes No N...

Page 44: ...VDS power supply of C415 is normal N403 and its periphery has problem If X403 has LVDS wave output Main CPU NS02 LVDS have problem Problem lies in LVDS wire or panel If audio amplifier has output if X13 has wave Speaker damaged If sound processing IC has output C116 C117 Audio amplifier and the circuit has problem Check the power supply 6 MUTE 14 19 Sound processing IC N03 and its periphery has pr...

Page 45: ...ing IC has output C27 C29 Audio amplifier and the circuit has problem Check the power supply 6 MUTE Turn on again after power off and check if the audio amplifier protection The path from AV terminal to this socket has problem NS02 or the periphery circuit of AV input have problem If X09 4 input signal If N04 12 of TV board has output signal If X09 4 input signal N04 emitter follow circuit and N07...

Page 46: ...cuit around SCART1 input has problem Check if X203 7 on SCART board has signal NS02 or the circuit around SCART1 input has problem The path from SCART2 socket to X203 has problem If RA26 input signal Check if NA01 5 has signal The path between YPbPr socket and NA01 has problem NA01 or the periphery has problem NA03 and its periphery has problem Yes No Yes No Yes No Yes No ...

Page 47: ...c signal NB14 and its periphery has problem The path between VGA and NB14 has problem Check if HDCP KEY flash written Write HDCP KEY If NB13 pin 28 30 33 35 38 40 43 45output signal NS02 or the circuit around HDMI input has problem NB14 or its periphery has problem If one channel HDMI no picture The path from NB14 or HDMI socket to NB14 has problem Yes No Yes No Yes No Yes No Yes No No Yes ...

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Page 54: ...IR KEY ...

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Page 56: ...decode ...

Page 57: ...high frequency ...

Page 58: ...connection ...

Page 59: ...d XI6FY0050110 Connection board XI6FY0052910 Video processing board XI6FY0054010 Key board XI6FY0140510 IR board XI6FY0140910 SCART connection board XI6FY0144610 Remote control XI6010J01101 Panel XI5203428503 APPENDIX A Main assembly LCD 42XR7H ...

Page 60: ......

Page 61: ...nfrared receiving board 3 Screen 4 Analog board 5 Main board 6 Key board 7 Speaker 8 Power board 9 Trans connecting board 10 Back cabinet 11 Stand 12 Power Switch 13 User manual 14 Remote Control PART LIST OF EXPLODED VIEW LCD 42XR7H ...

Page 62: ...0110 Main Board 1 5 XI6FY0140510 1 6 XI5H232LJ03A 1 7 XI6170728010 S peaker Bottom 1 8 XI6151073630 S tand 1 9 XI6FY0052910 Trans Connecting Board 1 10 XI6FY0054010 Analog Board 1 11 XI6FN0052010 Power Board 1 12 XI5293000042 Power S witch 1 13 XI5944029170 User Manual 1 14 XI6010J01101 R emote Control 1 Aug 07 LCD 42XR7H Front Cover Infrared R eceiving Board S creen Key Board Back Cabinet ver 1 0...

Page 63: ...Jun 2007 30 CPS ...

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