Sharp LC-32GA8 Service Manual page 35

LC-32/37GA8E/RU
LC-32/37BV8E/RU
Troubleshooting Table (continued)
TROUBLESHOOTING TABLE
No sound from an external
input device connected to
EXT1 (SCART1).
<EXT1>
Is IN1-L audio signal sent
from pin (6) of SCART1
terminal (J1101) to pin
(14) of IC3002 (VCT)?
Is IN1-R audio signal sent
from pin (2) of SCART1
terminal (J1101) to pin
(13) of IC3002 (VCT)?
YES NO
Check pins (6) and
(2) of SCART1 and
connection to an
external input
device.
No sound from external input devices (2)
No sound from an external No sound from an
input device connected to external input device
EXT2 (SCART2). connected to EXT3.
<EXT2> <EXT3>
Is IN2-L audio signal sent Is IN3-L audio signal
from pin (27) of SCART2 sent from pin (3) of
terminal (J1101) to pin J1201 terminal to pin
(12) of IC3002 (VCT)? (16) of IC3002?
Is IN2-R audio signal sent Is IN3-R audio signal
from pin (23) of SCART2 sent from pin (5) of
terminal (J1101) to pin J1201 terminal to pin
(11) of IC3002 (VCT)? (15) of IC3002?
YES NO YES
Check pins (27) and
(23) of SCART2 and
connection to an
external input
device.
Is the audio signal
NO
Check IC3002 or
properly sent from pins
peripheral circuits.
(28) and (27) of IC3002?
YES
Is the audio signal of
NO Check IC303 or
pins (1) and (7) of IC303
peripheral circuits.
(OP-AMP) sent properly?
YES
Is the audio output Check IC302/IC301
NO
signal of pins (13) and (MAIN-AMP),
(16) of IC302/IC301 HEADPHONE and
(MAIN-AMP) normal? peripheral circuits.
YES
Check CONNECTOR
(P301) and Speaker
(right and left).
No sound from EXT4
(AUDIO) connecting an
external input device.
<EXT4>
Is D-SUB-L audio signal
sent from J2702 to pin
(15) of IC2704?
Is D-SUB-R audio signal
sent from J2702 to pin
(2) of IC2704?
NO
Check pins 3
Is D-SUB-L audio signal
(J1201) and 5
sent to pin (10) of
(J1201) of EXT3
IC3002?
and connection to
Is D-SUB-R audio signal
an external input
sent to pin (9) of
device.
IC3002?
YES
OK
28
35
LC-32GA8/LC-32BV8
LC-37GA8/LC-37BV8
(Continued)
No sound from EXT5
(AUDIO) connecting an
external input device.
<EXT5>
Is HDMI-L audio signal
sent from J2701 to pin
(14) of IC2704?
Is HDMI-R audio signal
sent from J2701 to pin
(5) of IC2704?
YES
Is HDMI-L audio
signal sent to pin
YES
(10) of IC3002?
Is HDMI-R audio
signal sent to pin (9)
of IC3002?
Check output of pins
(13) and (3) of
IC2704 and
peripheral circuits.
Check that Option-
HDMI Setup-Audio
select is set to
"Analog".
LC-26GA5E
LC-32GA5E
YES
NO