Motorola APX 3000 Detailed Service Manual page 96

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