Motorola APX 1000 Detailed Service Manual page 768

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