Read Sharp LC-46LE821E (serv.man10) Service Manual online
LC-40/46LE811E, LC-40/46LE821E (1st Edition)
4 – 1
LC-40LE811E
Service Manual
CHAPTER 4.
TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
No sound (during the reception of TV (ANALOG) broadcasting)
Does not the sound go out though the picture has come out when UHF/VHF is received?
Is a SIF signal output from pin (9) of TUNER (TU1102)?
NO
Check the tuner and its peripheral circuits.
Replace as required.
Replace as required.
YES
Is a SIF signal input to (AB27/S_IF) of IC3302 (Digital AV decode
& Main CPU) from pin (9) of TU1102?
& Main CPU) from pin (9) of TU1102?
NO
Check the line between TU1102 and IC3302.
(Q1104, etc.)
(Q1104, etc.)
YES
Refer to “No sound output in all modes.”
No sound (during the reception of TV (DIGITAL) broadcasting)
Does not the sound go out though the picture has come out when DTV is received?
Is IF signal output to pins (20~30) of TU1102 ?
NO
Check the tuner and its peripheral circuits.
Replace as required.
Replace as required.
YES
Is signal sent to pins (11/T0_DATA1, 12/T0_DATA2, 13/
T0_DATA3, 14/T0_DATA4) of IC4405?
T0_DATA3, 14/T0_DATA4) of IC4405?
NO
Check the line between TU1102 and IC4405.
YES
Is signal output to pins (122/TS_VALIDO, 123/TS_CLKO, 124/
TS_DATAO, 125/TS_SYNCO) of IC4405?
TS_DATAO, 125/TS_SYNCO) of IC4405?
NO
Check IC4405 and its peripheral circuits.
YES
Is signal sent to pins (A30/TS_CPUIN_VAL, B30/
TS_CPUIN_CLK, C30/TS_CPUIN_SYNC, C29/TS_CPUIN_D0)
of IC3302 (Digital AV decode & Main CPU)?
TS_CPUIN_CLK, C30/TS_CPUIN_SYNC, C29/TS_CPUIN_D0)
of IC3302 (Digital AV decode & Main CPU)?
NO
Check the line between IC4405 and IC3302.
YES
Refer to “No sound output in all modes”.
No picture on the display (2)
Does not the picture come out when VHF/UHF is received?
Is the video signal (TUNER_CVBS) output from pin (11) of
TUNER (TU1102)?
NO
Check the tuner and its peripheral circuits.
Replace as required.
Replace as required.
YES
Is the video signal (TUNER_CVBS) sent to pin (AD29/
TU_CVBS) of IC3302 (Digital AV decode & Main CPU)?
TU_CVBS) of IC3302 (Digital AV decode & Main CPU)?
NO
Check the line between TU1102 and IC3302. (Q1106, etc.)
YES
Refer to “The picture doesn't appear in all modes.”
Display
