Motorola APX 3000

Troubleshooting Charts: Power-Up Failure 5-7
Power-Up Failure – Low LDO3 V_1.55 Voltage
Low
LDO3 V_1.55
Voltage
Measure Radio
Current
Inspect R6561
Connection
Measure V_2.23
at R6513
Likely MAKO Problem,
Replace Main Board
Is Standby Current
more than 15mA
above Average
2.0 < V < 2.4?
Is R6561
Soldered
Properly
Correct R6561
Soldering
Proceed to Low
V_2.23 Voltage
Flow Chart
Board has a short,
Replace Main Board
Yes
Yes
Yes
No
No
No