Pa Failure - Motorola APX 7000 Detailed Service Manual

5-48
5.19 PA Failure – Main
Yes, UHF2
Yes, VHF
Is no or low
Power in VHF or
7/800 band?
Yes, 7/800
1
Yes, VHF
Yes
Is no or low
1
Power in 7/800
band?
No
Is no or low
Yes,UHF1
Power in UHF1 7
or UHF2 band?
2
Yes,UHF2
9
No or Low Power
Measure Power at
several VHF, UHF1,
UHF2 and 7/800 test
frequencies.
Is the power
Yes, 7/800
level OK in
either band?
No
Yes
Is RX sensitivity
4
OK?
No
No, check the coaxial
antenna cable for
continuity and proper
engagement
Yes
Is coax cable
3
OK?
No
Replace
coaxial cable.
Troubleshooting Charts: PA Failure
Yes, UHF1
Yes
Is no or low
Power in VHF 2
band?
No
Is no or low
Yes,UHF1
Power in UHF1
7
or UHF2 band?
Is no or low
Power in VHF or
Yes,UHF2
7/800 band?
9
Yes, VHF
2
Yes, 7/800
1