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Motorola APX 2000 Detailed Service Manual

Motorola APX 2000
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5-22 Troubleshooting Charts: Main Display Failure
5.5 Main Display Failure
No Display
End
Check DC on following
Signal
V_Ext_1.86
V_2.775D
Replace LCD
Check the following signals:
Signal
F_DISP_RW
F_DISP_DATA_CMD
F_DISP_RW_EN
OMAP_RESET
Is 6 < V < 9
Check U6504 circuitry.
Signals
Correct?
Check U6302 and U6101
display lines. Change faulty
part.
Verify connectors from J2302 to
front kit flex.
Problem still persist?
Connectors
Good?
Replace chassis subassembly
replace board or flex
with bad connector
Yes
No
Yes
No
Yes
No
Yes
No
Probe Point
TP2005 on keypad
TP2008 on keypad
Level
0V
1.85V. Hi = Data. Low = Command
1.85V. 4MHz Square
1.85V
Probe Point
R2135
R2147
R2142
OMAP_RESET_TP

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Motorola APX 2000 Specifications

General IconGeneral
BrandMotorola
ModelAPX 2000
CategoryTwo-Way Radio
LanguageEnglish

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