Motorola APX 7500 Detailed Service Manual page 123

Troubleshooting Charts and Error Codes Troubleshooting Charts
Yes
Replace 2A fuse
F100.
Figure 7-5. Controller Board DC Voltages - A
68009482001
Set up Consolette
for tests. Make
sure all connectors
and cables are in
connect positions.
Consolette.
1
A+ (from power supply)
Is 13.2V
present at P2-
A+_CH
present at P10-
3
A+
No
Is 2A fuse
present at
F100 blown?
U1300-2?
No
1
A+ present at U1300-2
A+_FAN
Is 13.2V
2 present at
A+_GCAI
Is 13.2V
present at
P2000-1?
Turn on
Check that AC or DC source is present and that the
No
power supply is functioning. If a DC source is being
used, verify any fuse in its power cabling is not
1?
Yes
Is 13.2V
No
Is 4A fuse
F101 blown?
4?
Yes
Is 13.2V
Is inductor
L101 placed
properly
Yes
Is R100
No
placed &
measuring 56
P20-1?
Ohms?
Yes
Correctly place the
STOP
56 Ohm resistor
R100.
No
3
Yes
STOP
blown.
Yes
Replace 4A fuse
F101.
No
No
Properly place
inductor L101
Yes
1
Yes
3
No
2
September 9, 2011
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