Troubleshooting Flow Chart - Sangean U3 Service Manual
Am/fm 2 bands digital tuning radio receiver
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Also See for U3:
- Operating instructions manual (96 pages) ,
- User manual (22 pages) ,
- Specification sheet (1 page)
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TROUBLESHOOTING FLOW CHART
( 1 ) Weak sensitivity on FM mode
Check whether the sensitivity is
recovered if antenna is directly
connected to the point between
C4 and C5.
No
Check waveform.
No
Check CF4.
( 2 ) Weak sensitivity in AM band
Is the reception in AM band OK?
No
Check TC2.
No
Check T3 and CF2.
Check the antenna terminal and
Yes
antenna circuit.
Yes
Check T2 and CF3.
Yes
Check the antenna terminal and
antenna circuit.
18
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