Motorola APX 3000

Troubleshooting Charts: Power-Up Failure 5-5
Power-Up Failure – B+ Incorrect Voltage
B+ Incorrect Voltage
Check Voltage at
Test Point
F_UNSW_B+
(Main Board)
6 < V < 9?
Check input and
output voltage at
F200
Check Voltage at
C6593 (Controller)
No
Yes
6 < V < 9?
Check Q6501
Circuit and
Replace any non
Functional Parts
Replace Main
Board
No
Yes
Replace
Connector
No
Check circuitry from
battery contact to fuse.
Replace any non-
function part.
Yes
6 < V < 9?