Motorola APX 7000 Detailed Service Manual page 116

5-12
Power-Up Failure – Low VCC_SW_3.6 Voltage
Low VCC_SW_3.6 Voltage
Measure Radio
Current
Is Standby
Yes
Current more
than 15mA above
Average
No
Measure the
Voltage at L6501
No
6 < V < 9?
Yes
Inspect U6504 and
All Supporting
Circuitry
Are Parts Solder
No
Connections and
Placement Correct
Yes
Replace VOCON
Board
Troubleshooting Charts: Power-Up Failure
Board has a short,
Replace VOCON
Proceed to
Incorrect B+
Voltage
Replace or Repair
Part/s