Troubleshooting Charts:
Channel Select Error
5-25
5.8
Channel Select Error
CHANNEL
SELECT ERROR
Verify operation of
Channel Select
switch by using
“Button Test”
flowchart
Disconnect the control top flex from
the controller board. Visually
inspect the control top flex for tears
or other damage. For each
channel in error, use the chart to
compare the continuity to ground
for each pin.
Reconnect the control top to
the controller and power on
the radio. Verify the logic
levels at R2130, R2129,
R2128, R2127 with chart.
Verify board to flex
connection.
Pass Button
Test?
Logic Good?
Pass visual
inspection and
continuity check?
Replace Control
Top
Replace controller
board
Verify code plug
programming
Yes
Yes
Yes
No
No
No
Physical
Position
RTA3
(R2130)
RTA2
(R2129)
RTA1
(R2128)
RTA0
(R2127)
Channel 1
1
0
1
0
Channel 2
1
0
1
1
Channel 3
1
1
1
1
Channel 4
1
1
1
0
Channel 5
1
1
0
0
Channel 6
1
1
0
1
Channel 7
1
0
0
1
Channel 8
1
0
0
0
Channel 9
0
0
0
0
Channel 10 0
0
1
0
Channel 11 0
0
1
1
Channel 12 0
1
1
1
Channel 13 0
1
1
0
Channel 14 0
1
0
0
Channel 15 0
1
0
1
Channel 16 0
0
0
1
Summary of Contents for APX 6000
Page 1: ...APX TWO WAY RADIOS APX 5000 APX 6000 APX 6000XE SRX 2200 Detailed Service Manuals ...
Page 2: ......
Page 6: ...iv Document History Notes ...
Page 20: ...xviii CommercialWarranty Notes ...
Page 26: ...2 4 Radio Power DC Power Routing VOCON Board Notes ...
Page 100: ...3 74 Theory of Operation Bluetooth Notes ...
Page 172: ...5 66 Troubleshooting Charts PA Failure Notes ...
Page 250: ...6 78 Troubleshooting Waveforms LF CW on Spectrum Analyzer Notes ...
Page 276: ...7 26 Troubleshooting Tables List of Board and IC Signals Notes ...
Page 300: ...8 24 Schematics Boards Overlays and Parts Lists Transceiver RF Boards VHF Notes ...
Page 336: ...8 60 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF1 Notes ...
Page 378: ...8 102 Schematics Boards Overlays and Parts Lists Transceiver RF Boards 700 800 MHz Notes ...
Page 432: ...Glossary 10 Glossary Notes ...
Page 437: ......