Sanyo LCD-47XR7H, Руководство по обслуживанию

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b) TPA3001
The output of TPA3001 is differential output, so when check X12, X13 output signal with
oscilloscope, please use the power cord with two pins, otherwise, it may damage the audio
amplifier.
(4) a certain channel abnormal
a) AV no picture
b) TV no picture
Sound processing IC N03 and
its periphery has problem
If audio amplifier
output (X12, X13)
Speaker
If sound processing IC
has output (C27, C29) Audio amplifier and the circuit has problem.
Check the power supply, 6# MUTE. Turn on
again after power off and check if the audio
amplifier protection.
The path from AV terminal
to this socket has problem NS02 or the periphery circuit
of AV input have problem
If X09 4# input
signal
If N04 12# of TV board has
output signal
If X09 4# input
signal
N04 emitter-follow circuit
and N07 has problem
TUNER01or the periphery of N04
has problem. The emphasis is power
supply.
NS02 or the periphery circuit
of TV input have problem
No
Yes
No
Yes No
Yes No
Yes No