Motorola APX 6000 - Power-Up Failure

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