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8563E repair experience

Question asked by ateneycke on Jul 14, 2014
Received spectrum analyzer with symptoms of no high band above 2.9 GHz and the low band signal was shifting 40 MHz back and forth at all frequencies.  The solution ended up being replacement of the YTO and fairly difficult manual adjustment.  The adjustments necessary were the YTO adjustment, the A7 SLODA adjustment, the A10 RYTHM adjustment, and the frequency response adjustment.  The model was actually an 8563EC with LCD display which had the cable disconnected initially.  Ran with 8563E operation verification software on HT Basic for completion.  The Service manual was a must.  I do not have a 85629B TAM module but would be interested in how much better it makes the adjustments.