Sanyo PLV-55WHD1 Service Manual page 97

● No Sound
Check following steps.
No sound with all of
input sources
No Yes
Is the audio
observed at pins 14 and
25 of IC5101?
Yes
Is the audio
observed at pins 12 and
8 of IC001?
Yes
No sound with TV input
source
No
No sound with AV input
source
No
No sound with HDMI
and DIGITAL-TV input
source
No AUDIO-OUT output
No WOOFER output
signal Check audio signal selecting circuit.
No
All of the audio input signals are selected in IC5101(audio control).
-->
Check audio amp.and control circuit.
--> Check 16VA power supply line.
signal
No
-->
MUTE signal is applied on pin 6 of IC001 from pin 58 of IC801.
--> Check MUTE signal (Mute:H).
Check audio output circuit.
-->
Yes
Check TV audio signal circuit.
TV SIF signal is output from pin 16 of A101(analog tuner) and sent to
IC5001(MTS decoder), MTS signal is decoded in IC5001, and sent to
IC5101.
--> Check TUNER, IC5001 and peripheral circuit.
Yes
Check AV audio signal circuit.
AV audio signals are selected in IC5101(AV1 is in IC5001).
--> Check IC5101 and peripheral circuit.
Check HDMI and Digital-TV audio signal circuit.
Yes
These
IC6300(amp.).
--> Check IC5500, IC6300 and peripheral circuit.
Note: When using DVI-HDMI cable, HDMI input has no digital audio signal,
Video3 audio input is selected automatically.
Yes Check AUDIO-OUT audio signal circuit.
--> Check 9V or 8.7VA power supply line.
AUDIO-OUT signals are output from pins 11 and 28 of IC5101.
-->
Check woofer audio amp. circuit.
Yes
--> Check 9V or 8.7VA power supply line.
Woofer signal is output from pin 1 of IC5101, and sent to IC5181
(Woofer amp.). Woofer output level is controlled with user menu.
-->
Check IC5101 and peripheral circuit.
Check IC001(audio-amp), IC5101 and peripheral circuit.
Check speaker, connection of the terminal "K01R/K01L".
audio signals are output from IC5500 and sent to IC5101 via
Check IC5101 and peripheral circuit.
Check IC5181 and peripheral circuit.
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Troubleshooting