Motorola XTS 2500 Service Manual page 229

UHF2 Troubleshooting Charts: No Display Troubleshooting Chart (3 of 3)
6.3.16No Display Troubleshooting Chart (3 of 3)
Use an Oscilloscope to check for
a low level (0V) pulse occurrence
during power-on initialization period.
Use an Oscilloscope to check for
either a low level (0V) pulse or
high-level (1.85V) occurrence during
power-on initialization period.
6816985H01-F
3
Check Active
Low Status on
both RESET
and CS
Low-
No
Level Pulses
Present?
Yes
Check D0-D7
for appropriate
voltage levels
Signal
Yes
present
at appropriate
level?
No
Repair
appropriate
connections
6.3-15
Return radio to
service depot for
further analysis
MAEPF-27341-O
February 14, 2012