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5-20
Troubleshooting Charts
September 5, 2008
6881076C25-E
Chart C.26 ASTRO Spectra Plus VOCON DC Supply Failure
Check for 1.8V at R419
Make sure the following
components are placed
and soldered correctly:
U410, C430 R431, R451, R452,
C433, C415, R419
OK?
Repair proper
components
Replace U410
Fixed?
Refer board to
Service Depot
Yes
No
No
No
No
Yes
Yes
Yes
Check for 3.0 V at R420
Present?
Present?
No trouble found
U411, C434, C435, C436, C437,
Make sure the following
components are placed
and soldered correctly:
Check for 13.8 V at J501-35
Yes
Yes
Yes
Yes
END
END
No
No
No
No
OK?
OK?
Repair proper
components
Replace U411
Fixed?
Refer board to
Service Depot
Inspect placement and
soldering of J501
Refer board to
Service Depot
Repair connector
Present?
R420
Yes
END
No
Fixed?
Recycle radio
power
Summary of Contents for ASTRO Digital Spectra
Page 2: ......
Page 6: ...September 5 2008 6881076C25 E iv Document History Notes ...
Page 20: ...xviii List of Tables September 5 2008 6881076C25 E Notes ...
Page 24: ...September 5 2008 6881076C25 E xxii CommercialWarranty Notes ...
Page 48: ...September 5 2008 6881076C25 E xlvi Model Numbering Charts and Specifications Notes ...
Page 142: ...September 5 2008 6881076C25 E 3 82 Theory of Operation Power Amplifiers Notes ...
Page 434: ...September 5 2008 6881076C25 E Glossary 10 Notes ...
Page 440: ...Index 6 September 5 2008 6881076C25 E Notes ...
Page 441: ......