3-4
TROUBLESHOOTING CHARTS
2.0
Troubleshooting Flow Chart for 40 W Transmitter (Sheet 1 of 3)
START
Yes
No
Check components between
Q100 and RF output,
Antenna Switch D104,
D103, VR102 and Q106
No or too low power when keyed
Current
increase when
keyed?
Check power settings, tuning
& components between U103
Pin 3 and ASFIC Pin 6 before
replacing ASFIC
Control
Voltage at
TP150
>4Vdc?
Check PA
Stages
>4A
Voltage U103
pin 5 =
4.7V?
U103 Pin 3
<1.6Vdc
U100 Pin 3
>1.8Vdc
Check 9.3V
Regulator
U501
Yes
Yes
No
No
Yes
Check
U103
Check forward
Power Sense
Circuit
No
Short U100
Pin 3 to
ground
Voltage at
TP150 rises?
Check PA
Stages
Check Forward
Power Sense
Circuit
Yes
No
>500mA & <4A
<500mA
Summary of Contents for cm200 Commercial Series
Page 1: ......
Page 2: ......
Page 3: ...M CM200 CM300 PM400 Radios Detailed Service Manual 6881098C00 A ...
Page 6: ...THIS PAGE INTENTIONALLY LEFT BLANK Notes ...
Page 7: ...CM200 CM300 PM400 Radios Service Maintainability Issue November 2007 M ...
Page 10: ...iv Notes ...
Page 12: ...vi Notes ...
Page 16: ...1 4 INTRODUCTION Notes ...
Page 24: ...2 8 MAINTENANCE Notes ...
Page 27: ...CM200 CM300 PM400 Radios Control Head Service Information Issue November 2007 M ...
Page 32: ...1 2 OVERVIEW Notes ...
Page 46: ...4 2 CONTROLHEAD PCB SCHEMATICS PARTS LISTS Notes ...
Page 53: ...CM200 CM300 PM400 Radios UHF2 438 470 MHz 1 25 W Service Information Issue November 2007 M ...
Page 58: ...vi Notes ...
Page 62: ...1 4 MODEL CHART AND TECHNICAL SPECIFICATIONS Notes ...
Page 96: ...4 2 UHF2 PCB SCHEMATICS PARTS LISTS Notes ...
Page 151: ...CM200 CM300 PM400 Radios UHF2 438 470 MHz 25 40 W Service Information Issue November 2007 M ...
Page 156: ...vi Notes ...
Page 160: ...1 4 MODEL CHART AND TECHNICAL SPECIFICATIONS Notes ...
Page 194: ...4 2 UHF2 PCB SCHEMATICS PARTS LISTS Notes ...
Page 222: ...4 30 UHF 25 40 W Band 2 PCB 8486577Z01 Schematics Notes ...
Page 250: ...4 58 UHF 25 40 W Band 2 PCB 8486577Z03 Schematics Notes ...
Page 251: ...CM200 CM300 PM400 Radios UHF3 465 495 MHz 25 40 W Service Information Issue November 2007 M ...
Page 256: ...vi Notes ...
Page 260: ...1 4 MODEL CHART AND TECHNICAL SPECIFICATIONS Notes ...
Page 294: ...4 2 UHF3 PCB SCHEMATICS PARTS LISTS Notes ...
Page 322: ...4 30 UHF 25 40 W Band 3 PCB 8486577Z01 Schematics Notes ...
Page 350: ...4 58 UHF 25 40 W Band 3 PCB 8486577Z03 Schematics Notes ...
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