TM 11-6625-3025-14/ET426-AA-MMA-010/E154 VII210/T.O. 33A1-8-902-1-1
Table 6-1. Troubleshooting
Trouble
Probable Cause
Remedy
1.
Indicator lamp
a.
Fuse
Replace fuse
not illuminated.
b.
Indicator lamp
Replace indicator lamp
Power switch in
ON position.
2.
Indicator lamp
+5V, -5V and 12V
Check +5V, -5V and
illuminated.
power supply defective
+12V power supply levels
All sync genera tor
waveforms missing
(H drive, V drive
, blanking and sync
3.
No H drive,
a.
Master oscillator
Replace drive/blanking
V drive, blanking
circuit card
or sync waveforms
b.
Pulse output circuit card
Replace pulse output
circuit card
4.
Pulse timing and
Pulse output circuit card
Adjust pulse output
format correct.
(see figure 6-6)
Amplitude
incorrect.
5.
H drive correct,
Sync count circuit card
Replace sync count
but V drive,
circuit card
blanking and sync
incorrect at
vertical rate
6.
H drive and/or
2:1 count
Replace sync count
horizontal rate
circuit card
blanking pulse
missing or occurs
at 2 H rate
7.
H drive or
Drive/blanking
Replace drive/blanking
horizontal rate
circuit card
circuit card
blanking pulses
have incorrect
width or are erratic
8.
V drive or vertical
a.
Sync count circuit card
Replace sync count
rate blanking
circuit card
pulses incorrect,
b.
Drive/blanking
Replace drive/blanking
but H drive and
circuit card
circuit card
sync waveforms
are normal.
6-3
