NEC MultiSync 2A Service Manual page 25

5. H. OSC/DEF/HV. CIRCUIT FAULT
NO RASTER
ABNORMAL PICTURE SIZE
ABNORMAL VIDEO ON THE CRT SCREEN
CHECK THE VOLTAGE FORM
OF S2-3 AND S2-5
NG
OK
CHECK THE VOLTAGE
OF 0502 BASE
NG
OK
0502, 0501, T502 ( F . B
FAILURE
TWO VOLTAGE FORM
SYNCHRON�ZING
FAILURE
. T)
- 23 -
FREE RUNNING
OR NO PULSE
CHECK THE VOLTAGE
FORM TP501
NO PULSE
IC553, IC554 FAILURE
OK
IC451 FAILURE