NEC MultiSync FP1370 Service Manual page 107

CONTINUE1
OK
* When power switch on too, Check the voltage of IC801 pin 51 increase
at approx. C4P1 voltage (See Graph 5-8-1) + 0.5V
* Be sure to use voltage meter which has input impedance more than 10MΩ
OK
CRT, DY failure
C4P1 Time vs Voltage
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 1 2 3 4 5 6 7 8 9 10
Time(minute)
Graph 5-8-1: C4P1 Voltage
CONTINUE2
NG
/Q4P1, Q4P3, MD4P1
/or its associated circuit failure
NG
/Q4P4, D4P1, MD4P2, R4P7
/or its associated circuit failure
C4P1 Time vs Voltage
4
3.5
3
2.5
2
1.5
1
0.5
0
0 60 120
Time(minute)
7-19
180 240 300