Sharp Aquos LC-26A37M, Service Manual

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LC-26/32A37M
6 – 1
LC26A37M Service Manual
CHAPTER 6.
TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
Is the audio signal output of pins (28/L) and (27/R) of
NO
Check IC3001 and its peripheral circuits
IC3001 (MAIN_MICON) normal?
YES
Is the audio signal input to pin (3/L) and (7/R) of
NO
Check the line between IC3001 and IC2701
IC2701 (AMP)?
YES
Is MUTE circuit [MUTE_SP_LINE,RESET_N_LINE]
NO
Check the MUTE_SP_LINE and RESET_N_LINE
normal? (Q2701, etc.)
YES
Is the audio signal output of pins (3,4)(L-Ch) and
NO
(6,7)(R-ch) of P2701 (AOUDIO-CONNECTOR) normal ?
Check IC2701 and its peripheral circuits
YES
Check Speaker (right and left) and wire harness
Is the SIF signal output from pin (14) of TUNER
NO
Check the tuner and its peripheral circuits
(TU201) replace as required
YES
Is the SIF signal sent to pins (31) of IC3001
NO
Check line between TU201 and IC3001
(MAIN_MICON)?
YES
Refer to" No sound output in all modes".
Is the picture of the signal input from INPUT1/
NO
Refer to " Does not the picture of the HDMI signal input
INPUT2 displayed? to (INPUT1/INPUT2) go out?
YES
Is the HDMI_SCK/WS/SD0 audio output from pin (86)
NO
Check the line between IC1915 and IC3001 (MAIN
, (85),(84) of IC1915 (HDMI RECEIVER) to pin (39), MICON) and their peripheral circuits
(40), (38) of IC3001 (MAIN_MICON)?
YES
Refer to "No sound output in all modes".
No sound from external input devices (1)
Does not the sound of the audio signal input to INPUT1 / INPUT2 (HDMI) go out?
The sound is not emitted from the speaker though the picture has come out
No sound output in all modes?
No sound (during the reception of TV (Analog) broadcasting)
Does not the sound go out through the picture has come out when UHF/VHF is receive?