Sharp LC-32GA6E Service Manual page 46

LC-26GA6E/LC-26BV6E
LC-26GA5E
LC-32GA6E/LC-32BV6E
LC-32GA5E
LC-37GA6E
Troubleshooting Table (continued)
No audio output (4) (Sound from external input terminals)
External audio input signals
supplied from SCART1 and EXT3
are not heard.
<SCART1>
Is LI1 audio signal supplied from
the pin (6) of the input terminal
SC1451 to the pin (114) of
IC1001?
Is RI1 audio signal supplied from
the pin (2) of the input terminal
SC1451 to the pin (113) of
IC1001?
<EXT3>
Is LI2 audio signal supplied from
the J401 terminal to the pin (116)
of IC1001?
Is RI2 audio signal supplied from
the J401 terminal to the pin (115)
of IC1001?
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External audio input signals
supplied from SCART2 and PC
INPUT are not heard.
<SCART2>
Is L audio signal supplied from
the pin (6) of the input terminal
SC1452 to the pin (15) of
IC1401?
Is R audio signal supplied from
the pin (2) of the input terminal
SC1452 to the pin (2) of IC1401?
<PC-INPUT>
Is L audio signal supplied from
the PC-AUDIO CONNECTOR
(J402) to the pin (12) of
IC1401?
Is R audio signal supplied from
the J402 CONNECTOR to the
pin (1) of IC1401?
YES
Are audio signals sent to the pins
(3)(13) of IC1401?
Are LI3 and RI3 audio signals
supplied to the pins (118) and
(117) of IC1001 respectively?
Are audio signals sent to the pins
(1)(7) of IC1351 normally?
Are audio input signals of the
pins (11) (15) of IC1301(AUDIO-
AMP-IC) normal?
Are audio output signals of the
pins (28)(31)/(24) (27) of
IC1301(AUDIO-AMP-IC) normal?
Check the connector (P1301)
and the left and right SP-boxes.
YES
YES
YES
YES
YES
YES
46
NO
Check IC1401 and its
peripheral circuits.
NO
Check IC1351 and its
peripheral circuits.
NO
Check HEADPHONE-
JACK (J402) or its
peripheral circuits.
NO
Check IC1301 and its
peripheral circuits.