Troubleshooting Flow Chart for DC Supply (1 of 2)
3-9
5.0
Troubleshooting Flow Chart for DC Supply (1 of 2)
Since the failure of a critical voltage supply might cause the radio to automatically power down,
supply voltages should first be probed with a multimeter. If all the board voltages are absent, then
the voltage test point should be retested using a rising-edge-triggered oscilloscope. If the voltage is
still absent, then another voltage should be tested using the oscilloscope. If that voltage is present,
then the original voltage supply in question is defective and requires investigation of associated
circuitry.
Check VDC on
C5008
V=3.3V
?
Check Voltage on
C5043
No
Go to D3_3V
Yes
9v<V<9.8v
?
Go to Start
No
Replace U508
Yes
3V
Check VDC on
C5006
V=5V
?
Check Voltage on
C5042
No
Go to 3V
Yes
9v<V<9.8v
?
Go to Start
No
Replace U503
Yes
5V
Содержание Radius CM200
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Страница 3: ...M CM200 CM300 PM400 Radios Detailed Service Manual 6802966C20 C ...
Страница 6: ...Notes ...
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Страница 9: ...CM200 CM300 PM400 Radios Service Maintainability M Issue May 2009 ...
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Страница 18: ...1 4 INTRODUCTION Notes ...
Страница 26: ...2 8 MAINTENANCE Notes ...
Страница 29: ...CM200 CM300 PM400 Radios Control Head Service Information M Issue May 2009 ...
Страница 34: ...1 2 OVERVIEW Notes ...
Страница 48: ...4 2 CONTROL HEAD PCB SCHEMATICS PARTS LISTS Notes ...
Страница 55: ...CM300 Radio VHF1 136 162 MHz 25 45 W Service Information M Issue May 2009 ...
Страница 60: ...vi Notes ...
Страница 64: ...1 4 MODEL CHART AND TECHNICAL SPECIFICATIONS Notes ...
Страница 98: ...4 2 VHF1 PCB SCHEMATICS PARTS LISTS Notes ...
Страница 124: ...4 28 VHF 25 45 W Band 1 PCB 8486487Z03 Schematics Notes ...
Страница 125: ...CM200 CM300 PM400 Radios VHF2 146 174 MHz 1 25 W Service Information M Issue May 2009 ...
Страница 130: ...vi Notes ...
Страница 134: ...1 4 MODEL CHART AND TECHNICAL SPECIFICATIONS Notes ...
Страница 164: ...3 8 TROUBLESHOOTING CHARTS Notes ...
Страница 166: ...4 2 VHF2 PCB SCHEMATICS PARTS LISTS Notes ...
Страница 192: ...4 28 VHF 1 25 W Band 2 PCB 8488977U01 rev P9 Schematics Notes ...
Страница 218: ...4 54 VHF 1 25 W Band 2 PCB 8486672Z01 Schematics Notes ...
Страница 219: ...CM200 CM300 PM400 Radios VHF2 146 174 MHz 25 45 W Service Information M Issue May 2009 ...
Страница 224: ...vi Notes ...
Страница 228: ...1 4 MODEL CHART AND TECHNICAL SPECIFICATIONS Notes ...
Страница 262: ...4 2 VHF2 PCB SCHEMATICS PARTS LISTS Notes ...
Страница 312: ...4 52 VHF 25 45 W Band 2 PCB 8486487Z04 Schematics Notes ...
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