NEC MultiSync FP1350 Service Manual page 133

CONTINUE1 CONTINUE2
CONTINUE1 CONTINUE2
CONTINUE3
NG
Measure the voltage at C5P1 on the SW/HV PWB (PWE-571).
Check 15V line.
NG
OK
Check HV drive pulse.
OK
NG
Check the horizontal trigger pulse.
NG
OK
• Q5F1 and its ambient circuit failure.
• Q5F2 and its ambient circuit failure.
• IC2001 and its ambient circuit failure.
• T5R1 (FBT) failure.
• VR5T1 and its ambient circuit failure.
• ICD5P1 failure.
• R5R3 failure.
Remove L5R1 and check 80V line again.
NG
• Video amplifier IC721 on the VIDEO
PWB (PWE-567A) failure.
• Check SW REG circuit. (see item 13)
OK
Q5R1 and its ambient circuit failure.
Check SW REG circuit. (see item 13)
Check the pulse at Q5R1 gate on the SW/HV PWB
(PWE-571).
• Q5R1 and ambient circuit failure.
• T5R1 (FBT) failure.
Check the pulse at pin 4 of ICD5P1 on
the SW/HV PWB (PWE-571).
CN-DF Failure.
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