Motorola APX 6000 - Page 118

5-12 Troubleshooting Charts: Power-Up Failure
Power-Up Failure – Low V_SW_3.6 Voltage
Low V_SW_3.6 Voltage
Measure Radio
Current
Is Standby
Current more
than 15mA above
Average
Board has a short,
Replace VOCON
Yes
Measure the
Voltage at R6524
6 < V < 9?
Proceed to
Incorrect B+
Voltage
Inspect U6504 and
All Supporting
Circuitry
Are Parts Solder
Connections and
Placement Correct
Replace or Repair
Part/s
Replace VOCON
Board
No
No
Yes
No
Yes