Prima PH50D8, Service Manual, Page: 26 / 46

-
2
4 -
No picture in sub channel:
yes no
yes no
3) No picture in YPRPB or YCRCB
yes no
YCRCB YPRPB
At the same time
normal abnormal
Check to see if pin 72 of
N302 has signal input
Measure Y and C signal output from R340~R345and
line/field signal and see if they are normal
There is problem from Av socket to
N302 channel
N501 PW181 or other peripheral
circuit have problem N302 or other peripheral
circuit have problem
Check if YPRPB/YCRCB1and YPRPB/YCRCB2
both have no picture.
N1and interface circuit have
problem
Identify if YPRPB or YCRCB
has problem
Check N302 and
peripheral
If input VGA signal is
normal
Check N402 (including
switching voltage
HDTV_SELandC410
Check N403 and periphera
G PORT of N501
and peripheral