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3.1.3 Checking VCTCXO Circuit
Test Point
U101. 4
U101. 3
Circuit Diagram
Waveform
Graph 3-1(a)
Checking Flow
Check U101 Pin 3
◆ Refer to Graph 3-1(a)
19.2MHz OK?
Check U101 Pin 4
◆ Refer to Graph -1(b)
+2.85V OK?
Check U401
VCTCXO Circuit is Ok
Yes
See next Page to check
Duplexer
No
Yes
Changing U101
No
Graph 3-1(b)
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