Motorola APX 5000 Service Manual page 118

5-12
Power-Up Failure – Low V_SW_3.6 Voltage
Low V_SW_3.6 Voltage
Measure Radio
Current
Is Standby
Yes
Current more
than 15mA above
Average
No
Measure the
Voltage at R6524
No
6 < V < 9?
Yes
Inspect U6504 and
All Supporting
Circuitry
Are Parts Solder
No
Connections and
Placement Correct
Yes
Replace VOCON
Board
Troubleshooting Charts: Power-Up Failure
Board has a short,
Replace VOCON
Proceed to
Incorrect B+
Voltage
Replace or Repair
Part/s