Youtor
Marconi 2955 Test Set Demo and PLL Repair
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=6-xmi_cjW5M
0:00 Self Test • 1:19 Intro and update • 2:43 what is it? • 3:29 previous state • 4:10 the symptoms • 5:30 the problem • 7:15 Component location and explanation • 9:30 tests and diagnostics • 13:35 the exact fault • 14:34 the fix • 16:11 receiver sensitivity test demo • 20:00 transmitter test demo • 21:35 final thoughts • • Showing off a working Marconi 2955 communications monitor/radio test set after fixing the PLL. • Capacitor C108 on board AA3 failed short in my unit causing a high PLL control voltage yielding incorrect frequencies from the generator and no output on HF.
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