Sharp LC-26GA5F Service Manual page 40

LC-26GA5E
LC-26GA5E
LC-32GA5E
LC-32GA5E
Troubleshooting Table (continued)
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?
YES
No audio output (4) (Sound from external input terminals)
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?
YES
Are LI3 and RI3 audio signals
supplied to the pins (118) and
(117) of IC1001 respectively?
YES
Are audio signals sent to the pins
(1)(7) of IC1351 normally?
YES
Are audio input signals of the pins
(11)(15) of IC1301 (AUDIO-AMP-
IC) normal?
YES
Are audio output signals of the
pins (28)(31)/(24)(27) of IC1301
(AUDIO-AMP-IC) normal?
YES
Check the connector (P1301) and
the left and right SP-boxes.
40
External audio input signals
supplied from EXT4 are not
heard.
<EXT4>
Are audio signals supplied
from J1901 to the pins (4)(11)
of IC1401?
YES
Check COMPONENT
Terminal (J1901) and
its peripheral circuits.
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.
NO