Motorola APX 7000 - Advanced Features; Companding; Compressor; Expander

Troubleshooting Charts: Top/CID Display Failure 5-19
5.5 Top/CID Display Failure
Replace Control Top
Assembly
No Display
1.8V < V < 2.0V?
Check DC on R2101
Problem
Resolved?
Check DC R2102
2.7V < V < 2.9V?
Check SPI CLK
(R2328), Data
(R2327), and CS
(J2101, Pin 43)
Signals Present?
Check Mating Board
Connectors
Replace Board With
Bad Connectors As
Needed
End
Yes
No
Proceed to DC
Flowchart
Replace Vocon
Board
No
Yes
Yes
Yes
No
No