DOWNLOAD Sharp LC-19SH7E Service Manual ↓ Size: 20.71 MB | Pages: 127 in PDF or view online for FREE

Model
LC-19SH7E
Pages
127
Size
20.71 MB
Type
PDF
Document
Service Manual / Specification
Brand
Device
TV / LCD
File
lc-19sh7e.pdf
Date
PREV: Sharp LC-19LE510K (serv.man10) Service Manual / Technical Bulletin

Sharp LC-19SH7E Service Manual / Specification ▷ View online

         2008-03-14 
LC-19SH7E/RU, LC-26SH7E/RU, LC-32SH7E/RU, LC-42SH7E/RU 
 41 
No picture on the display (1) 
↓ 
The picture doesn't appear in all modes.
 
MAIN UNIT:
  
 
    ↓ 
 
 
 
 
 
 
 
 
 
 
 
↓NO 
 
YES 
 
 
↓YES 
 
 
 
PANEL_UNIT:
  
 
 
↓YES 
 
 
↓YES 
 
 
 
No picture on the display (2) 
↓ 
Does not the picture come out when VHF/UHF is received?
 
TERMINAL UNIT:
    
   ↓ 
 
 
MAIN_UNIT: 
 
   
↓YES 
 
 
 
 
 
   ↓YES 
 
 
 
 
 
 
 
 
 
 
 
Is LCD controller's control signal normal?
Is the above-mentioned LVDS signals output to connector CN751?
NO 
 
Check the line between IC U400 and CN751.
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.
 
Is LVDS signal output from 1st_channel and 2nd_channel of IC U400 in each mode? 
(A0N/A0P),(A1N/A1P),(A2N/A2P),(A3N/A3P),(CK1N/CK1P)
 
Check IC U400 and its peripheral control circuits.
Is picture signal input from pin (24) of TUNER (TU201) to pin 
(AB24) of IC U400?
 
Is TUNER_CVBS signal output from pin (24) of TUNER (TU201)?
NO 
 
Check whether I2C is normally accessed between TU201 and IC  
U400.
 
NO 
 
Check the line between IC U400 and TU201.
Refer to “The picture doesn't appear in all modes.”
 
LC-19SH7E/RU, LC-26SH7E/RU, LC-32SH7E/RU, LC-42SH7E/RU 
42  
No picture on the display (3) 
↓ 
Does not the picture come out when DTV is received?
 
TERMINAL UNIT:
    
↓ 
 
 
 
 
 
↓YES 
 
 
↓YES 
 
 
 
MAIN_UNIT:  
↓YES 
 
 
 
 
 
↓YES 
 
 
↓YES 
 
 
 
<External input SCART1>No picture on the display (4) 
↓ 
Does not the picture of the CVBS signal input to SCART1 go out?
 
TERMINAL UNIT:
    
↓ 
 
 
MAIN_UNIT:  
↓YES 
 
 
 
 
 
↓YES 
 
 
 
 
 
 
 
 
 
 
Is IF signal output from pin (20), (21) of TUNER (TU201) to pin 
(R25), pin (T25) of IC U400 ?
 
Is the voltage of regulation for a TUNER circuit and the power 
supply terminal of IC U400 supplied? 
NO 
 
Each power supply circuit is checked.
 
NO 
 
Check the tuner, IC U400 and their peripheral circuits. Replace 
as required.
 
NO 
 
Is MPEG data (TS0INDATA0, TS0INSYNC, TS0INCLK, 
TS0INVALID) from IC U400 are output to pin (9), pin (7), pin (6), pin 
(8) of a IC U401?
 
is communication control carried out between pin (12)(SCL), 
pin(13)(SDA), of TU201, and pin(F24)(TUNER_SCL1), pin 
(F25)(TUNER_SDA1), of IC U400?
 
Is MPEG data (TS_DATAO, TS_CKO, TS_VALIDO, TS_SYNCO) 
from IC U401 are output to pin (B21/A21/B20/C21) of a IC U400?
 
NO 
 
Is the control signal between IC U401 and IC U400 normal? 
(RESET_CI, etc.).
 
Do X300 (60.00MHz)/ X400 (27MHz) oscillate? 
 
NO 
 
Check X300/ X400 and its peripheral circuits.
Refer to “The picture doesn't appear in all modes.”
 
Is CVBS signal sent to pin (20) of SCART1 (CN500)?
 
NO 
 
Check the setting of an external input device that connects of 
CN500.
 
Refer to “The picture doesn't appear in all modes.”
 
Is CVBS signal sent to pin (AE24) of IC U400?
 
NO 
 
Check the line between IC U400 and CN500.
         2008-03-14 
LC-19SH7E/RU, LC-26SH7E/RU, LC-32SH7E/RU, LC-42SH7E/RU 
 43 
<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 >No picture on the display (6) 
↓ 
Does not the picture of the Y/C signal input to SCART1 go out?
 
TERMINAL UNIT:
    
↓ 
 
 
 
MAIN_UNIT:  
↓YES 
 
 
 
 
 
 
↓YES 
 
 
 
 
<External input AV3(Composite)>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 
(CN500)?
 
NO 
 
Check the setting of an external input device that connects of 
CN500.
 
Refer to “The picture doesn't appear in all modes.”
 
Is RGB signal sent to pin (AF24)/R, (AD24)/G, (AD23)/B of IC 
U400?
 
NO 
 
Check the line between IC U400 and CN500.
Is Y/C signal sent to pin (20) and (15) of SCART1 (CN500)?
 
NO 
 
Refer to “The picture doesn't appear in all modes.”
 
Is Y/C signal sent to pin (AE24)/Y, (AF25)/C of IC U400?
 
NO 
 
Check the line between IC U400 and CN500.
Check the setting of an external input device that connects of 
CN500.
 
Is CVBS signal sent to pin (2) of AV3 (CN650) ?
 
NO 
 
Check the setting of an external input device that connects of 
CN650.
 
Refer to “The picture doesn't appear in all modes.”
 
Is CVBS signal sent to pin (AC24) of IC U400?
 
NO 
 
Check the line between IC U400 and CN650.
LC-19SH7E/RU, LC-26SH7E/RU, LC-32SH7E/RU, LC-42SH7E/RU 
44  
<External input HDMI1>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 
 
 
 
<External input VGA>No picture on the display (9) 
↓
  
Does not the picture of the PC IN(ANALOG) video signal input to VGA(15pin-D-SUB terminal) go out?
 
TERMINAL_UNIT:
   
↓ 
 
 
MAIN_UNIT:  
↓YES 
 
 
 
 
 
 
↓YES 
 
 
 
 
 
 
 
 
 
 
 
Is the HOT_PLUG detection function of pin (19) of a HDMI terminal 
(CN700) normal?
 
NO 
 
Check the line between pin (AB5) of IC U400 and CN700.
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 U701 (EEPROM), pin (5)(SDA)  
accessed, and is it read from pin (15), pin (16) of a HDMI 
terminal(CN700)?
 
NO 
 
Is access possible in the re-writing or exchange of EDID data of 
IC U701?
 
Check CN700, IC U701 and peripheral circuits.
Is TMDS signal input into pin(AF18, AE18)/RX2±,(AF17, 
AE17)/RX1±, (AF16, AE16)/RX0±, (AF15, AE15)/RXC± of IC U400?
Check the line between IC U400 and CN700.
NO 
 
Is R/G/B/H/V signal sent to pin (1)/R, (2)/G, (3)/B, (14)/H, (13)/V of 
VGA (CN554)?
 
NO 
 
Check the setting of an external input device that connects of 
CN554.
 
Refer to “The picture doesn't appear in all modes.”
 
Is R/G/B/H/V signal sent to pin (AE20)/R, (AE19)/G, (AD19)/B, 
(AC18)/H, (AB18)/V of IC U400?
 
NO 
 
Check the line between IC U400 and CN554.
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