Codan 2110 series, Repair Manual

Page: 127 / 164

Repair procedures, tests, and adjustments
Manpack Transceiver 2110 series Repair Guide 95
Figure 29: Repair flowchart
Power On test
Operational tests
Front panel test
Pass test?
Power On fault
diagnosis flowchart
Pass test?
Mechanical inspection
Yes
No
No
Sensitivity test
Receive tests
Pass test?
AGC test
Pass test?
Audio Output test
Pass test?
Basic Receive test
Pass test?
Receive fault
diagnosis flowchart
Selectivity test
Pass test?
Noise Limiter test
Pass test?
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Frequency test
Transmit tests
Pass test?
ALC test
Pass test?
RF Output Power and
Low Power tests
Pass test
s
?
Basic Transmit test
Pass test?
Transmit fault
diagnosis flowchart
Distortion and
Intermodulation tests
Yes
Yes
Yes
Yes
No
No
No
No
Antenna Tuner test
(transmit)
Yes
Pass tests?
Yes
No
Adjust high and low
power
Adjust frequency
Repair flowchart
Inspect for damage
Receive fault
diagnosis flowchart
Pass test? No
Yes
Re-assemble transceiver,
if required
PA & Filter PCB
suspected faulty
RF/IF & Synthesiser PCB
suspected faulty
Audio & Control PCB
suspected faulty
RF/IF & Synthesiser PCB
suspected faulty
RF/IF & Synthesiser PCB
suspected faulty
Test completed
PA & Filter PCB
suspected faulty
Adjust bias
Distortion and
Intermodulation tests
Pass tests?
No
Yes
RF/IF & Synthesiser PCB
suspected faulty
Basic operation
Examine profile
Yes
Antenna Tuner PCB
suspected faulty
Antenna Tuner test
(receive)
Pass test?
Yes
Antenna Tuner PCB
suspected faulty
No
Program transceiver with
original profile
See page 58
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See page 99
See page 60
See page 101
See page 63
See page 101
See page 63
See page 64
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See page 70
See page 71 and page 72
See page 105
See page 81
See page 79
See page 73 and page 75
See page 62
See page 62
See page 81
See page 83