May 28, 2008
6871620L01-C
5-26
Troubleshooting Charts:
TX RF
5.13 TX RF–Page 1
No
Yes
No or low
TX power
Check
FGU
Frequency
OK?
No
Yes
Check
FGU
Level
about
3 dBm?
Measure RF level
at Q107 pin 1
Use a spectrum analyzer
and high-impedance RF
probe. Measure TXRF
at C101
Level about
+20 dBm?
No
No
Yes
Yes
Power 2W?
END
Measure RF Power at
RF Jack J1704
(via a Power Meter)
1
2
Summary of Contents for ASTRO XTSTM 4000
Page 1: ...COLOR CHORDS 7 ASTRO XTSTM 4000 Portable Radio Detailed Service Manual ...
Page 2: ......
Page 16: ...May 28 2008 6871620L01 C xiv Commercial Warranty Notes ...
Page 22: ...May 28 2008 6871620L01 C 1 6 Introduction Notes ...
Page 26: ...May 28 2008 6871620L01 C 2 4 Radio Power Notes ...
Page 56: ...May 28 2008 6871620L01 C 3 30 Theory of Operation Notes ...
Page 100: ...May 28 2008 6871620L01 C 6 8 Troubleshooting Waveforms Notes ...
Page 194: ...May 28 2008 6871620L01 C B 2 Motorola Service Centers Notes ...
Page 204: ...May 28 2008 6871620L01 C Glossary 10 Glossary Notes ...
Page 209: ......