Motorola APX 7000 - Advanced Features; Changing Your Tactical Inhibit Password; Enabling or Disabling the Radio Lock Feature (Secure Radios Only)

Troubleshooting Charts: Main Display Failure 5-21
5.6.2 For Display Part No. 72012006002 Only
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 LCD_HSYNC (R2304),
LCD_VSYNC (R2303),
LCD_PCLK (R2305),
LCD_OE (R2306), CS
(MNCN6202:J2301, Pin 50)
Yes
Proceed to DC
Flowchart
No
Signals Present?
Check Vocon, Keypad,
and Display
Connectors
Connectors
Good?
Replace Back Chassis
Subassembly
Yes
Yes
No
Replace Vocon
Board
No
Replace Board/
FPC Containing
Connectors
Yes
Yes
No
No