Motorola APX 3000

Troubleshooting Charts: Power-Up Failure 5-11
Power-Up Failure – Low V_2.23 Voltage
Low V_2.33 Voltage
Measure Radio
Current
Measure Voltage
at R6542
Inspect U6506 and
Supporting
Circuitry
Replace Board
Is Standby Current
more than 15mA
above Average
Are Parts Solder
Connections and
Placement Correct
3.3 < V < 3.9?
Proceed to Low
V_SW_3.6
Voltage Flow
Chart
Replace or Repair
Part/s
Board has a short,
Replace Board
Yes
Yes
Yes
No
No
No