NEC MultiSync FP1350 Service Manual page 117

CONTINUE 1 CONTINUE 2
NG
Check IC711 input
1) NG
Check IC731
output (VIDEO)
NG
Check IC731
input (VIDEO)
CONTINUE 1 CONTINUE 2
OK
Q711 R/G/B failure.
1) Measure the video input at IC711 pins 6(R), 11(G) and 2(B) on
VIDEO PWB (PWE-567A). The voltage is approx. 0.78Vp-p.
2) Measure the clamp pulse input at IC711 pin 19 on VIDEO PWB
(PWE-567A). The voltage is approx. 4.2Vp-p.
3) Measure the voltage at IC711 pin 15 on VIDEO PWB (PWE-567A).
The voltage is approx. 3.9V
4) Measure the voltage at IC711 pin 30 on VIDEO PWB (PWE-567A).
The voltage is approx. 2.3V
5) Measure the voltage at IC711 pin 17 on VIDEO PWB (PWE-567A).
The voltage is approx. 5.0V
1)-5) OK
IC711 failure.
2) NG
IC7A1 failure.
3) NG
C773 or Q772 failure.
4) NG
D713 failure.
5) NG
LC768 failure.
Measure the video output at IC731 pins 35(R), 30(G) and 27(B) on VIDEO
PWB (PWE-567A). The voltage is approx. 0.78Vp-p.
OK
C711 R/G/B or C712R/G/B failure.
Measure the video input at IC731 pins 2(R), 5(G) and 7(B) [BNC] or pins
11(R), 13(G) and 16(B) [D-SUB] on VIDEO PWB (PWE-567A). The
voltage is approx. 0.7Vp-p.
.
DC
.
DC
.
DC
7-5