Agilent Technologies HP 8719D Service Manual page 253

Note
Repair signal path R before troubleshooting signa.I path A or B.
1. If R is the bad signal path, substitute A6 (R 2nd converter) with a 2nd
converter from the working signal path.
trace of F'igure 8-l.
If the trace appears normal, replace the faulty 2nd converter.
n
If the trace appears abnormal, replace AlO.
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1. If A is the bad signal path, remove A6 (the working R signal path 2nd
converter) and install A4 (the suspect A signal path 2nd converter) in its
place.
2. If B is the bad signal path, substitute A6 with A5.
trace of Figure 8-l.
If the trace appears normal, the substitute 2nd converter is good. Replace
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If the trace appears abnormal, the substitute 2nd converter is faulty.
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Replace A4 (or A5).
Receiver Troubleshooting E-9