Motorola APX 7000 - Advanced Features; System Setup for ASTRO Advanced Messaging Solution; Two-Factor Authentication

Troubleshooting Charts: Power-Up Failure 5-9
Power-Up Failure – Low VBUS2 Voltage
Low VBUS2 Voltage
Measure
VCC_SW_5 at
R6544
5.1 < V < 5.6?
Proceed to Low
SW5 Volatge Flow
Chart
Measure VBUS1
Supply Volatge at
R6529
5.1 < V < 5.6?
Inspect Q6505 and
Supporting
Circuitry
Are Parts Solder
Connections and
Placement Correct
Replace VOCON
Board
Repair Incorrect
Part/s
No
Yes
No No
Yes
Inspect U6503 and
Supporting Ciruitry
Are Parts Solder
Connections and
Placement Correct
Check Placement
of Q6503
Repair Incorrect
Part/s
Is Part Placed
Correctly
Replace Part
Replace VOCON
Yes
No
Yes
Yes
No