34
LC-26GA5E
LC-32GA5E
LC-32GA8/LC-32BV8
LC-37GA8/LC-37BV8
Troubleshooting Table (continued)
27
LC-32/37GA8E/RU
LC-32/37BV8E/RU
TROUBLESHOOTING TABLE
(Continued)
No sound (1) (during the reception of TV broadcasting)
No audio output during UHF/VHF reception
Checklist:
1) Is the volume set to MIN or MUTE on the remote control?
···
Set the desired volume.
2) Are headphones connected to HEADPHONE (J1301)?
···
Disconnect them.
3) Is ANT-CABLE disconnected or connected improperly?
···
Connect it correctly as per the operation manual.
NO
Is the audio signal (L/R) sent from pins (28) and (27) of IC3002
(VCT)?
NO
YES
Is the audio signal of pins (3)
and (5) of IC303 (OP-AMP)
sent properly?
(AV-UNIT)
(TUNER)
Check IC303 or peripheral
circuits.
NO
YES
YES
Is the audio signal of pin (4)
of IC301/IC302 (AUDIO-
AMP) sent properly?
Check HEAD-PHONE
(J1301) or peripheral
circuits.
NO
Is the audio signal output of
pins (2) and (4) of P301
(AUDIO-CONNECTOR)
normal?
YES
Check Speaker (right and
left) and wire harness.
Check P301 (AUDIO-
CONNECTOR) and
peripheral circuits.
YES
NO
Is the audio signal (SIF) sent
from pin (1) of CONNECTOR
(SC2705)?
Check pin (31) of IC3002
(VCT) and peripheral
circuits.
YES
Is the SIF signal ()
sent to pin (31) of IC3002
(VCT)?
Check w5V and +8V
are supplied to pins (33) and
(18) of IC3002 respectively.
Or, check peripheral circuits.
YES
NO
NO
NO
NO
Is the audio signal (SIF) sent
from pin (12) of IC201 (IF-
DEMOD)?
Check Q203 (AMP) and
peripheral circuits.
YES
Is the SIF signal sent to pins
(23) and (24) of IC201 (IF-
DEMOD)?
Check IC201 and peripheral
circuits.
YES
Is the IF signal sent from pin
(11) of TUNER (TU201)?
Check FL202 and peripheral
circuits.
YES
Check whether 33V and 5V
are supplied to pins (9) and
(7) of TUNER (TU201)
respectively. Check
SDA/SCL and AGC signal.
Replace TUNER (TU201).
