XOCECO PH42T7, Service Manual

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4.2 YPrPb or YCrCb no picture
4.3 TV no picture
Check if YPRPB1 / YCRCB1 and YPRPB2
/YCRCB2 channels is no picture.
check interface
circuit.
Check if the YPRYPB input pin
of N700 have signal.
Check N700 and
periphery circuit
Yes No
No
Yes
Check if the input signal of
N700 is normal.
Check if AV channel
is normal.
N700 damaged
Check if N700 has
output.
Check N903
M52797 and the
tuner.
Check N602 and
periphery circuit
Abnormal Normal
Normal Abnormal
No Yes