Power-Up Failure - Motorola APX 5000 Service Manual

Troubleshooting Charts: Power-Up Failure
Power-Up Failure – B+ Incorrect Voltage
B+ Incorrect Voltage
Check Voltage at
Test Point
F_UNSW_B+
(VOCON)
6 < V < 9?
Yes
Check Voltage at
R6505 (VOCON)
6 < V < 9?
Yes
Replace VOCON
Board
Check Mating
No
Connector to RF
Board
Check Q6501
No
Circuit and
Replace any non
Functional Parts
No
RF to Vocon
Connectors
ok?
Yes
Replace RF
Board, Check
F_UNSW_B+ Test
Point
Replace RF Board
Replace
Connector
No
Replace VOCON
6 < V < 9?
Board
Yes
5-5