Motorola APX 3000

5-6 Troubleshooting Charts: Power-Up Failure
Power-Up Failure – Low LDO10 V_3.3 Voltage
Low
LDO10 V_3.3
Voltage
Measure Radio
Current
Inspect R6566
Connection
Measure SW1 at R6542
Likely MAKO Problem,
Replace Main Board
Is Standby Current
more than 15mA
above Average
3.3 < V < 3.9?
Is R6566 Soldered
Properly
Correct R6566
Soldering
Proceed to Low
V_SW_3.6 Voltage
Flow Chart
Board has a short,
Replace Main Board
Yes
Yes
Yes
No
No
No