Hitachi LC57 Service Manual page 92

2-18 TROUBLESHOOTING FLOW CHARTS
BACK TO ADJUSTMENTS
1
Ensure Y signal at
pin 4 of PHS2.
NG
Ensure Y signal at
emitter of QJ22.
NG
Ensure Y signal at
base of QJ22.
NG
Ensure Y signal at
input of HJ04.
NG
Ensure Y signal at
pin 12 of IJ09
NG
IJ09 defect
Signal PWB defect
OK
RJP5 defect
OK
QJ22 defect
OK
HJ04 defect
OK
RJP1 defect
OK
92
LC57