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Motorola APX 3000 Detailed Service Manual

Motorola APX 3000
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Troubleshooting Charts: DC Supply Failure 5-15
5.4 DC Supply Failure
5.4.1 DC Supply 5 Volt Failure
V_SW_5
Is fuse intact
(not blown)?
Replace Fuse
Verify UNSW_B+ at
test point: F_UNSW_B+
Verify if USB accessory is
shorting VBUS line.
Verify L200, C202
and C203 is good
Replace accessory
or cable
Verify SW_B+
at C6565
Check Q6502 and
Q6508 for damage
Is 6 < V < 9
Verify Q6501
Measure BGAP_COMP
voltage at R6543
Is 2.2 < V < 2.7
Check U6505 circuitry. If good,
change U6505
Check BGAP_COMP circuitry.
Replace defective part
Is radio current
>100mA
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No

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Motorola APX 3000 Specifications

General IconGeneral
BrandMotorola
ModelAPX 3000
CategoryTwo-Way Radio
LanguageEnglish

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