Sony HKDV-900, Maintenance Manual

Page: 21 / 88

2-9 (E)
HKDV-900
(4) CP-364 board power check
(5) Reset signal check
2-3. Troubleshooting
Is
+
5 V DC present to test point TP602
(J-1) on the CP-364 board?
Harness defect or soldering defect of
connector CN600
OK
Is
+
3.3 V DC present to TP600 (G-1) ?
NG
+
3.3 V power supply block defect
NG
OK
Is + 2.5 V DC present to TP601 (G-1) ?
OK
To “(5) Reset signal check”
+ 2.5 V power supply block defect
NG
Is TP501 (J-2) on the CP-364 board high
level?
NG
Are not reset signal line and GND
shorted?
OK
Reset switch defect, soldering defect of
reset signal line or pattern-bridge of it
NG
Are pin 1 and pin 2 of IC501 (J-2) on the
CP-364 board high level?
NG
Did 10 seconds pass at least after the
power is turned on?
OK
IC defect of IC200 (G-1) or IC202 (H-1)
on the CP-364 board