Motorola APX 7000 - Advanced Features; Unlocking Your Radio; Changing Your Password

5-20 Troubleshooting Charts: Main Display Failure
5.6 Main Display Failure
5.6.1 For All Display Except Part No. 72012006002
Replace LCD
No Display
2.7V < V < 2.9V?
Check DC on R2301
both sides
Problem
Resolved?
Proceed to DC
Flowchart
End
1.8V < V < 2.0V?
Check DC on R2302
Check SPI CLK
(R2325), Data
(R2326), and CS
(MNCN6200: J2301, Pin 34
MNCN6202: J2301, Pin 50)
Yes
Proceed to DC
Flowchart
No
Signals Present?
Check RGB Interface
Timing Waveforms
Signals Present?
Check Vocon, Keypad,
and Display
Connectors
Connectors
Good?
Replace Back Chassis
Subassembly
Yes
Yes
Yes
No
Replace Vocon
Board
No
Replace Vocon
Board
No
Replace Board/
FPC Containing
Connectors
Yes
Yes
No
No