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
Summary of Contents for ASTRO APX 7000
Page 1: ......
Page 4: ...iv Document History Notes ...
Page 24: ...2 4 Radio Power DC Power Routing VOCON Board Notes ...
Page 98: ...3 74 Theory of Operation Global Positioning System GPS ...
Page 163: ...Troubleshooting Charts PA Failure 5 59 ...
Page 164: ...5 60 Troubleshooting Charts PA Failure ...
Page 276: ...7 58 Troubleshooting Tables List of Board and IC Signals Notes ...
Page 318: ...8 42 Schematics Boards Overlays and Parts Lists Transceiver RF Boards VHF 700 800 Notes ...
Page 380: ...8 104 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF1 700 800 MHz Notes ...
Page 432: ...8 156 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF1 VHF Notes ...
Page 458: ...8 182 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF1 UHF2 Notes ...
Page 498: ...8 222 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF2 700 800 MHz Notes ...
Page 546: ...8 270 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF2 VHF Notes ...
Page 606: ...8 330 Schematics Boards Overlays and Parts Lists VOCON Boards Notes ...
Page 638: ...Glossary 10 Glossary Notes ...
Page 643: ......