Hitachi 50VF820 Service Manual page 91

2-18 TROUBLESHOOTING FLOW CHARTS
2.18-2 Troubleshooting for HDMI
(1) No HDMI picture
BACK TO ADJUSTMENTS
Start
Ensure power at pin
20 and 19 of PHS2.
OK
HDMI 1?
YES
Ensure Y signal at
pin 9 of PHS2.
NG
Ensure Y signal at
emitter of QJ10.
NG
Ensure Y signal at
base of QJ10.
NG
Ensure Y signal at
input of HJ01.
NG
Ensure Y signal at
pin 12 of IJ03.
NG
IJ03 defect
Signal power PWB or Signal PWB defect
NG
1
NO
Signal PWB defect
OK
RJ93 defect
OK
QJ10 defect
OK
HJ01 defect
OK
RJ89 defect
OK
91
LC58/LC58E