Motorola APX 7500 - Page 123

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