Trouble Shooting Charts - NEC DSC-3261HA Service Manual

5. Trouble Shooting Charts

1. NO RASTER
Check
Standby 5.5V &
Main B+(132V) line
ABNORMAL
Check/Replace
Voltage of C893
ABNORMAL
Check/Replace
F801 Fuse(6.3A 250V)
Check/Replace
D801, R805, R803
Check/Replace
I801(STR-6709),
Peripheral components
Check/Replace
I802(KP-1010C)
Check voltage at 64th
pin of I701(normal:0V)
Open 64th pin of I701
---> OK(set power on)
Peripheral components
of Check OCP, OVP line
VOLTAGE
ABNORMAL
NORMAL
Check
secondary voltage,
stand-by 5V line,
Check/Replace
I805, R835, S/B line
13
Check horizental dirve
Pulse at 24th pin of I701
ABNORMAL
NORMAL
Check horizontal Vcc,
R555 at 24th pin of I701,
X501(20.25),"
signal at 59.60th pin of
I701(SCL, SDA)
Check/Replace I701
Check/Replace
Q401, T401, Q402
D402, D831