Sharp LC-26SB25E, Service Manual

Page: 42 / 172

LC-26SB25E/S/RU, LC-32SB25E/S/RU, LC-42SB55E/S/RU
42
The audio signal is not output (1)
↓
The audio signal of UHF/VHF is not output from SCART1.
TEREMINAL UNIT:
↓
↓
NO
↓
NO
The audio signal is not output (2)
↓
The audio signal of UHF/VHF/MONITOR is not output from SCART2.
TEREMINAL UNIT:
↓
↓
NO
↓
NO
The audio signal is not output (3)
↓
No audio signal output from LINE_AUDIO_OUTPUT terminal.
TEREMINAL UNIT:
↓
↓
NO
↓
NO
Is audio signal output from IC U400 sent to pin (2)(LRCLK) and pin
(3)(DIN) and pin (4)(BCLK) and pin(13)(MCLK) of IC U602?
Is audio signal output from IC U602 sent to pin (3)(SCT1_AUL-
OUT) and pin(1)(SCT1_AUR-OUT) of SCART1(CN500)? YES Check the connection to SCART1 and external devices.
YES Check the line between IC U400 and IC U602.
Check IC U400 and its peripheral circuits.
Is the audio signal output from IC U400 of pin (E26) (AL2) and pin
(F25) (AR2) sent to pin (2)(1IN-) and pin (6)(2IN-) of IC U603?
Is audio signal output from IC U603 sent to
pin(3)(SCT2_AUL_OUT) and pin(1)(SCT2_AUR_OUT) of YES Check the connection to SCART2 and external devices.
YES Check the line between IC U400 and IC U603.
Check IC U400 and its peripheral circuits.
Is the audio signal output from IC U400 of pin (E26) (AL2) and pin
(F25) (AR2) sent to pin (2)(1IN-) and pin (6)(2IN-) of IC U603?
Is audio signal output from IC U603 sent to pin (2)(L_OUT) and pin
(4)(R_OUT) of LINE_AUDIO_OUT connector(CN556)? YES Check the connection to LINE_AUDIO_OUT and external
devices.
YES Check the line between IC U400 and IC U603.
Check IC U400 and its peripheral circuits.