Motorola APX 6000 - Page 117

Troubleshooting Charts: Power-Up Failure 5-11
Power-Up Failure – Low V_2.23 Voltage
Low V_2.23 Voltage
Measure Radio
Current
Is Standby
Current more
than 15mA above
Average
Board has a short,
Replace VOCON
Yes
Measure Voltage
at R6573
3.3 < V < 3.9?
Proceed to Low
V_SW_3.6
Voltage Flow
Chart
Inspect U6506 and
Supporting
Circuitry
Are Parts Solder
Connections and
Placement Correct
Replace or Repair
Part/s
Replace VOCON
Board
No
Yes
No
Yes