No Raster - NEC MultiSync FP1370 Service Manual

1. NO RASTER

Check 230V line
Check 80.2V line
Check 14.5V line
Check -15.6V line
Check 8.5V line
NG
OK
Is LED power
indicator green ?
NG
OK
Check HV operation
NG
OK
Check 6.2V line
NG
OK
Check the screen voltage
CONTINUE
Remove the CN-K, measure the voltages at K1(230V), K2(14.5V), K4(-15.6V) and
CN-P P3(80.2V),P6(8.5V) on the SW/HV PWB (PWE-571)
Check SW REG. (see item 13 )
Check H and V sync input.
Check PMS (see item 11)
Judge peculiar noise of HV generated at power SW or static electricity.
Check H OSC/DEF/HV circuit (see item 6)
Measure the voltage at IC7F1 3 pin on the CRT PWB (PWE-567C).
R7F5,IC7F1 and their ambient circuit failure
Measure the voltage at TP-G2 on the CRT PWB (PWE-567C). Normally,
screen voltage is 700!5V.
7-2