DOWNLOAD Sharp LC-26LE430E Service Manual ↓ Size: 15.96 MB | Pages: 127 in PDF or view online for FREE

Model
LC-26LE430E
Pages
127
Size
15.96 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
lc-26le430e.pdf
Date
PREV: Sharp LC-26LE320E (serv.man10) Service Manual / Technical Bulletin

Sharp LC-26LE430E Service Manual ▷ View online

         2008-03-14 
LC-19LE430E, LC-22LE430E, LC-26LE430, LC-32LE430E 
 53 
The audio signal is not output (1) 
↓ 
The audio signal of UHF/VHF is not output from SCART.
 
TEREMINAL UNIT:
   
    ↓ 
 
 
 
↓NO 
 
 
↓NO 
 
 
 
 
The audio signal is not output (2) 
↓ 
The audio signal of UHF/VHF/MONITOR is not output from audio line output terminal.
 
TEREMINAL UNIT:
   
    ↓ 
 
 
 
↓NO 
 
 
↓NO 
 
 
 
 
 
The audio signal is not output (3) 
↓ 
No audio signal output from SPDIF_OUTPUT terminal.
 
TEREMINAL UNIT:
   
    ↓ 
 
 
↓NO 
 
 
Is audio signal output from IC U401 is sent to pin (2) (1IN-) and pin 
(6) (2IN-)of IC U603? 
Is audio signal output from IC U603 sent to pin (3) 
(SCT1_AUL_OUT) and pin(1)(SCT1_AUR_OUT) of  
SCART(CN151)?
 
YES 
 
Check the connection to SCART1 and external devices.
YES 
 
Check the line between IC U401 and IC U603.
Check IC U401 and its peripheral circuits.
Is audio signal output from IC U401 is sent to pin (2) (1IN-) and pin 
(6)(2IN-)of IC U601? 
Is audio signal output from IC U601 sent to pin 
(4)(SCT2_AUL_OUT) and pin(6)(SCT2_AUR_OUT) of 
SCART2(CN152)?
 
YES 
 
Check the connection to AV output and external devices.
YES 
 
Check the line between IC U401 and IC U601.
Check IC U401 and its peripheral circuits.
Check IC U401 and its peripheral circuits.
Is ASPDIF audio signal output from pin (206) of IC U401 to pin (2) 
of connector CN117?
 
YES 
 
Check the connection to SPDIF_OUT and external devices.
LC-19LE430E, LC-22LE430E, LC-26LE430E, LC-32LE430E 
54  
The audio signal is not output (4) 
↓ 
No sound from HEADPHONE_OUTPUT terminal.
 
MINI AV_UNIT:
  
 
    ↓ 
 
 
↓YES 
 
 
↓YES 
 
 
↓YES 
 
 
 
 
 
 
 
 
 
 
Is the audio signal output from IC U602 to pin (2) (HPOUTL) and 
pin (3) (HPOUTR) of headphone terminal CN602?
 
Is the HP_DET# signal input into pin (253) of IC U401 from pin (6) 
of a headphone terminal (CN602)? 
NO 
 
Check the connection to CN602 and external headphone is plug 
in well.
 
NO 
 
Check the line between IC U602 and CN602.
Check IC U401 and its peripheral circuits.
Is the audio signal output from IC U401 pin (201) and pin (203) sent 
to pin (1)(HPL_IN) and pin(4)(HPR_IN) of IC U602? 
NO 
 
Check the line between IC U401 and IC U602.
         2008-03-14 
LC-19LE430E, LC-22LE430E, LC-26LE430, LC-32LE430E 
 55 
No picture on the display (1) 
↓ 
The picture doesn't appear in all modes.
 
MAIN UNIT:
  
 
    ↓ 
 
 
 
 
 
 
 
 
 
 
↓YES 
 
 
↓YES 
 
 
 
PANEL_UNIT:
  
 
     ↓YES 
 
 
↓YES 
 
 
 
 
 
No picture on the display (2) 
↓ 
Does not the picture come out when Analog TV 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?
Check the line between IC U401 and CN408.
NO 
 
Check the panel module. 
Similarly, is the LVDS signal input to connector of the panel 
module?
NO 
 
Wire harness is checked. (main board 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 (13), (14) of TUNER (TU101)/ pin (10), 
(11) of TU102 to in (184), (185) of IC U401?
 
Are the voltages 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 (27.00MHz) oscillate? 
Check X4150 and its peripheral circuits.
 
Refer to “The picture doesn't appear in all modes.”
 
NO 
 
Control signals BRIGHT_ADJ, INVERTER_ON_OFF, 
PANEL_VCC_ON/OFF, and it peels off and whether normality is 
checked.
NO 
 
LC-19LE430E, LC-22LE430E, LC-26LE430E, LC-32LE430E 
56  
No picture on the display (3) 
↓ 
Does not the picture come out when Digital TV (Antenna/Cable) is received?
 
TERMINAL UNIT:
    
    ↓ 
 
 
MAIN_UNIT: 
 
     
↓YES 
 
 
↓YES 
 
 
 
 
                                      
↓YES 
 
 
↓YES 
 
 
 
 
 
<External input SCART>No picture on the display (4) 
↓ 
Does not the picture of the CVBS signal input to SCART go out?
 
TERMINAL UNIT:
    
    ↓ 
 
 
MAIN_UNIT: 
 
     
↓YES 
 
 
 
 
 
      
↓YES 
 
 
 
 
 
 
 
 
 
 
 
Is CVBS signal sent to pin (20) of SCART (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 CVBS signal sent to pin (175) of IC U401?
 
NO 
 
Check the circuit between IC U401 and CN151.
Is IF signal output from pin (13), (14) of TUNER (TU101)/ pin (10), 
(11) of TU102 to pin (35), (36) of IC U1011?
 
Are the voltages 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 U1011 and their peripheral circuits. Replace 
as required.
 
NO 
 
Do X4150 (27.00MHz) oscillate? 
Check X4150 and its peripheral circuits.
 
Refer to “The picture doesn't appear in all modes.”
 
Are MPEG data (DEMOD_INDATA0, TSYNC, TVAL, and TCK) 
signals from pin (15), (16), (17), (18) of IC U1011 output to IC 
U401?
 
Check MPEG data bus from IC TU1011 to IC U401.
NO 
 
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