Polaroid PLA-4200M, Руководство по обслуживанию

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PDP TV SERVICE MANUAL
Display image but without sound
Turn on to check
whether there is noise
Check whether the
volume is correctly set
Check J7 waveform
of Speaker's audio
output
Check and exchange IC
U3
Check IC U3 Whether
input-60#/output-27#
28# signal is OK
Check and exchange
speaker
Check IC U4 whether
input or output signal
is ok.
Check and exchange IC U4
Read the operating
instruction, and set the
volume again
exchange tuner board
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