Motorola APX 3000

5-12 Troubleshooting Charts: Power-Up Failure
Power-Up Failure – Low V_SW_3.6 Voltage
Low V_SW_3.6 Voltage
Measure Radio
Current
Measure the
Voltage at R6542
Inspect U6504 and
All Supporting
Circuitry
Replace Board
Is Standby Current
more than 15mA
above Average
Are Parts Solder
Connections and
Placement Correct
6 < V < 9?
Proceed to
Incorrect B+
Voltage
Replace or Repair
Part/s
Board has a short,
Replace Board
Yes
Yes
Yes
No
No
No