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August 16, 2007
6816985H01-B
6.2-6
UHF1 Troubleshooting Charts:
DC Supply Fail Troubleshooting Chart (1 of 3)
6.2.7 DC Supply Fail Troubleshooting Chart (1 of 3)
Problem with DC supply
distribution network
End
Check voltage VSW1 at
R711
Voltage
=3.6V
+/- 5%
Check voltage V1.55 at
R718
Replace Q702
Problem
Solved?
Yes
No
Check voltage V1.875 at
L703
Voltage
=1.875V
Yes
No
Voltage
=1.55V
Replace U701
Yes
No
Check voltage V2.9 at
L704
Yes
No
Voltage
=2.9V
No
Yes
3
Summary of Contents for ASTRO MT 1500
Page 4: ...iv Table of Contents August 16 2007 6816985H01 B Notes ...
Page 164: ...August 16 2007 6816985H01 B 5 6 Troubleshooting Procedures Operational Error Codes Notes ...
Page 188: ...August 16 2007 6816985H01 B 6 1 24 VHF Troubleshooting Charts Secure Hardware Failure Notes ...
Page 212: ...August 16 2007 6816985H01 B 6 2 24 UHF1 Troubleshooting Charts Secure Hardware Failure Notes ...
Page 236: ...August 16 2007 6816985H01 B 6 3 24 UHF2 Troubleshooting Charts Secure Hardware Failure Notes ...
Page 710: ...9 2 40 UHF1 Schematics Board Overlays and Parts Lists August 16 2007 6816985H01 B Notes ...
Page 806: ...9 5 32 900MHz Schematics Board Overlays and Parts Lists August 16 2007 6816985H01 B Notes ...
Page 816: ...Index 4 August 16 2007 6816985H01 B Notes ...
Page 817: ......