Motorola APX 6000 Service Manual

Troubleshooting Charts: Main Display Failure 5-23
5.6 Main Display Failure
Replace LCD
No Main Display
Are Voltages
correct?
Check DC on the following:
Signal Probe Point
V_EXT_1.85 Pin 12 of J2304
V_2.775D Pin 2 of J2304
Problem
Solved?
Proceed to DC
Flowchart
End
Check the following signals:
Signal Probe Point Level
F_DISP_RW R2335 0V
F_DISP_DATA_CMD R2347 1.85V. Hi = Data. Low = Command
F_DISP_RW_EN R2342 1.85V. 4 MHz Square
OMAP_RESET R2343 1.85V
Signals Correct?
Check Vocon to front
display connector J2304
Connectors
Good?
Replace Back Chassis
Subassembly
Yes
Yes
No
Replace Vocon
Board
No
Replace Board/
FPC Containing
Connectors
Yes
Yes
No
No

Motorola APX 6000 Specifications

General

Brand	Motorola
Model	APX 6000
Category	Two-Way Radio
Language	English