User Guide

PAMS
Technical Documentation
NME–3
Troubleshooting
Page 37
Issue 1 10/99
Transmitter Fault (5)
Diode (V252):
Pin 3: Picture 17?
Transistor (V251)::
Emitter: 8V DC?
Check V8PA supply!
Detector-
Fault
Check R272, R271, C261, R269
for short circuits and soldering!
Change defective components!
Transistor (V251):
Base: Picture 18?
Check R264, R267, C260, R265,
R262, V252, R259, V261
for short circuits and soldering!
Change defective components!
PA Module (N254):
Pin 2: 12V DC?
Check VPA supply!
Transistor (V251):
Collector: Fig 19?
Check V251
for short circuits and soldering!
Change defective components!
Check V250, R253, R254
for short circuits and soldering!
Change defective components!
No
Yes
No
No
No
No
Yes
Yes
Yes
Yes