Motorola APX 1000 Detailed Service Manual page 764

5-8
Power-Up Failure – Low LDO8 V_5.0A Voltage
Low
LDO8 V_5.0A
Voltage
Measure Radio
Current
Is Standby Current
more than 15mA
above Average
No
Inspect R6565
Connection
Is R6565
Soldered
Properly
Yes
Measure Voltage
at C6593
6.0 < V < 9.0?
Yes
Likely MAKO Problem,
Replace Main Board
Troubleshooting Charts: Power-Up Failure
Yes
Board has a short,
Replace Main Board
No
Correct R6565
Soldering
No
Proceed to
Incorrect B+
Voltage Flow
Chart