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42PQ1100-ZE (CHASSIS:PD92A) - LG TV Service Manual (repair manual). Page 52

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< SPDIF waveform – sample >
- Defend on the input signal.
Making 
Revision 
2009. 2 . 1
PDP TV
Input
Block
Optical Audio Problem
N
Check  Signal (JK1000  #3)
Check SPDIF signal (R137)
Replace Mstar IC100
Replace JK1000
Y
Y
12/14
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