DOWNLOAD Sharp LC-37LE320E Service Manual ↓ Size: 40.22 MB | Pages: 127 in PDF or view online for FREE

Model
LC-37LE320E
Pages
127
Size
40.22 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
lc-37le320e.pdf
Date
PREV: Sharp LC-37HV4EB (serv.man4) Service Manual / Technical Bulletin

Sharp LC-37LE320E Service Manual ▷ View online

         2008-03-14 
LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320 
 121 
No picture on the display (1) 
↓ 
The picture doesn't appear in all modes.
 
MAIN UNIT:
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
↓NO 
 
YES 
 
↓YES 
 
 
 
MEMC_UNIT:
  
 
    ↓YES 
 
 
↓YES 
 
 
PANEL_UNIT:
  
 
    ↓YES 
 
 
 
↓YES 
 
 
 
 
No picture on the display (2) 
↓ 
Does not the picture come out when TV (Antenna) is received?
 
TERMINAL UNIT:
    
    ↓ 
 
 
 
 
 
     
↓YES 
 
 
 
MAIN_UNIT: 
 
     
↓YES 
 
 
↓YES 
 
 
 
 
 
 
 
 
 
 
 
Is LCD controller's control signal normal?
Is the above-mentioned LVDS signals output to connector CN408?
NO 
 
Check the line between IC U401 and CN408.
NO 
 
Control signals BRIGHT_ADJ, INVERTER_ON_OFF, 
PANEL_VCC_ON/OFF, and it peels off and whether normality is 
checked.
 
Check the panel module. 
Similarly, is the LVDS signal input to connector of the panel 
module?
 
NO 
 
Wire harness is checked.( MEMC module to Panel module )
Is LVDS signal output from 1st_channel and 2nd_channel of IC U401 in each mode? 
(A0N/A0P),(A1N/A1P),(A2N/A2P),(A3N/A3P),(CK1N/CK1P)
 
Check IC U401 and its peripheral control circuits.
Is IF signal output from pin (16), (17) of TUNER (TU102) to pin 
(AH35), pin (AH37) of IC U401?
 
Is the voltage of regulation for a TUNER circuit and the power 
supply terminal of IC U401 supplied? 
NO 
 
Each power supply circuit is checked.
 
NO 
 
Check the tuner, IC U401 and their peripheral circuits. Replace 
as required.
 
NO 
 
Do X4150 (54.00MHz) oscillate? 
 
Check X4150 and its peripheral circuits.
 
Refer to “The picture doesn't appear in all modes.”
 
Similarly, is the LVDS signal input to connector CN405 of the 
MEMC module?
NO 
 
Wire harness is checked.
 
Check is the LVDS signal out from the connector CN406, CN407 of 
MEMC module. 
Check IC U404 and its peripheral circuits.
NO 
 
LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320 
122  
No picture on the display (3) 
↓ 
Does not the picture come out when TV (Cable) is received?
 
TERMINAL UNIT:
    
    ↓ 
 
 
 
 
 
    
↓YES 
 
 
↓YES 
 
 
 
 
MAIN_UNIT: 
 
    
↓YES 
 
 
↓YES 
 
 
 
 
<External input SCART1, SCART2>No picture on the display (4) 
↓ 
Does not the picture of the CVBS signal input to SCART1 go out?
 
Does not the picture of the CVBS signal input to SCART2 go out?
 
TERMINAL UNIT:
    
    ↓ 
 
 
 
MAIN_UNIT: 
 
    
↓YES 
 
 
 
 
 
 
 
  
↓YES 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Is CVBS signal sent to pin (20) of SCART1 (CN151)?
 
NO 
 
Check the setting of an external input device that connects of 
CN151.
 
Refer to “The picture doesn't appear in all modes.”
 
NO 
 
Check the setting of an external input device that connects of 
CN152.
 
Is CVBS signal sent to pin (20) of SCART2 (CN152)?
 
Is CVBS signal sent to pin (AP33) of IC U401?
 
Is CVBS signal sent to pin (AT33) of IC U401?
 
NO 
 
NO 
 
Check the line between IC U401 and CN151.
Check the line between IC U401 and CN152.
Is IF signal output from pin (16), (17) of TUNER (TU102) to pin (29), 
pin (30) of IC U101?
 
Is the voltage of regulation for a TUNER circuit and the power 
supply terminal of IC U401 supplied? 
NO 
 
Each power supply circuit is checked.
 
NO 
 
Check the tuner, IC U101 and their peripheral circuits. Replace 
as required.
 
NO 
 
Do X4150 (54.00MHz) oscillate? 
 
Check X4150 and its peripheral circuits.
 
Refer to “The picture doesn't appear in all modes.”
 
Is MPEG data (CI_INDATA0, TSYNC, TCK) signal from pin (11), 
(8) (9) of IC U101 are output to IC U401?
 
 
 
Check IC U101 and their peripheral circuits. Replace as required.
 
NO 
 
         2008-03-14 
LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320 
 123 
<External input SCART1>No picture on the display (5) 
↓ 
Does not the picture of the R/G/B video signal input to SCART1 go out?
 
TERMINAL UNIT:
    
    ↓ 
 
 
MAIN_UNIT: 
 
     
↓YES 
 
 
 
 
 
 
     
↓YES 
 
 
 
<External input SCART1, SCART2>No picture on the display (6) 
↓ 
Does not the picture of the Y/C signal input to SCART1 go out?
 
Does not the picture of the Y/C signal input to SCART2 go out?
 
TERMINAL UNIT:
    
    ↓ 
 
 
 
 
MAIN_UNIT: 
 
    
↓YES 
 
 
 
 
 
 
 
    
↓YES 
 
 
 
<External input AV3>No picture on the display (7) 
↓ 
Does not the picture of the composite video signal input to AV3(Composite) go out?
 
TERMINAL UNIT:
    
    ↓ 
 
 
MAIN_UNIT: 
 
    
↓YES 
 
 
 
 
 
    
↓YES 
 
 
 
 
 
 
 
 
 
 
 
 
Is RGB signal sent to pin (15)/R, (11)/G, (7)/B, of SCART1 
(CN151)?
 
NO 
 
Check the setting of an external input device that connects of 
CN151.
 
Refer to “The picture doesn't appear in all modes.”
 
Is RGB signal sent to pin (AU30)/R, (AP29)/G, (AR28)/B of IC 
U401?
 
NO 
 
Check the line between IC U401 and CN151.
Is Y/C signal sent to pin (20) and (15) of SCART1 (CN151)?
 
NO 
 
Refer to “The picture doesn't appear in all modes.”
 
NO 
 
Is Y/C signal sent to pin (20) and (15) of SCART2 (CN152)?
 
Is Y/C signal sent to pin (AP33)/Y, (AU30)/C of IC U401?
 
Is Y/C signal sent to pin (AT33)/Y, (AR34)/C of IC U401?
 
NO 
 
NO 
 
Check the line between IC U401 and CN151.
Check the line between IC U401 and CN152.
Check the setting of an external input device that connects of 
CN151.
 
Check the setting of an external input device that connects of 
CN152.
 
Is CVBS signal sent to pin (2) of AV3 (CN136)?
 
NO 
 
Check the setting of an external input device that connects of 
CN136.
 
Refer to “The picture doesn't appear in all modes.”
 
Is CVBS signal sent to pin (AU36) of IC U401?
 
NO 
 
Check the line between IC U401 and CN136.
LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320 
124  
<External input HDMI1,2,3>No picture on the display (8) 
↓ 
Does not the picture of the HDMI signal input to HDMI1 go out?
 
MINI AV_UNIT:
  
 
    ↓ 
 
 
↓ 
 
YES
 
 
 
 
 
 
    
 
↓NO 
YES
 
  
 
 
                                   
      
YES
 
 
 
 
 
 
    
↓YES 
 
 
 
 
Does not the picture of the HDMI signal input to HDMI2 go out?
 
MINI AV_UNIT:
  
 
     ↓ 
 
 
↓ 
 
YES
 
 
 
 
 
 
    
 
↓NO 
YES
 
  
 
 
                                   
         
YES
 
 
 
 
 
 
      
↓
YES 
 
 
 
 
 
 
 
 
 
 
Is the HOT_PLUG detection function of pin (19) of a HDMI terminal 
(CN502) normal?
 
NO 
 
Check the line between pin (50) of IC U501 and CN502.
Refer to “The picture doesn't appear in all modes.”
 
Check the connection and setup with the external HDMI devices.
Are EDID data pin (6)(SCL) of IC U503 (EEPROM), pin (5)(SDA)  
accessed, and is it read from pin (15), pin (16) of a HDMI 
terminal(CN502)?
 
NO 
 
Is access possible in the re-writing or exchange of EDID data of 
IC U503?
 
Check CN502, IC U503 and peripheral circuits.
Is TMDS signal input into pin(63, 62)/RX2-2±,(60, 59)/RX2-1±, (57, 
56)/RX2-0±, (54, 53)/RX2-C± of IC U501?
Check the line between IC U501 and CN502.
NO 
 
Is TMDS signal output from pin(17, 18)/ 2±,(20, 21)/ 1±, (23, 24)/ 0±, 
(26, 27)/ C± of IC U501?
 
Check IC U501 and peripheral circuits.
 
NO 
 
Is the HOT_PLUG detection function of pin (19) of a HDMI terminal 
(CN501) normal?
 
NO 
 
Check the line between pin (64) of IC U501 and CN501.
Refer to “The picture doesn't appear in all modes.”
 
Check the connection and setup with the external HDMI devices.
Are EDID data pin (6)(SCL) of IC U502 (EEPROM), pin (5)(SDA)  
accessed, and is it read from pin (15), pin (16) of a HDMI 
terminal(CN502)?
 
NO 
 
Is access possible in the re-writing or exchange of EDID data of 
IC U502?
 
Check CN502, IC U503 and peripheral circuits.
Is TMDS signal input into pin(14, 13)/RX1-2±,(11, 10)/RX1-1±, (8, 
7)/RX1-0±, (5, 4)/RX1-C± of IC U501?
 
Check the line between IC U501 and CN501.
NO 
 
Is TMDS signal output from pin(17, 18)/ 2±,(20, 21)/ 1±, (23, 24)/ 0±, 
(26, 27)/ C± of IC U501?
 
Check IC U501 and peripheral circuits.
 
NO 
 
Page of 127
Display

Click on the first or last page to see other LC-37LE320E service manuals if exist.

RANDOM: