Black Knight 2000
Williams, 1989You're currently viewing posts by Pinsider terryb.
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Your problem is likely upstream, either Q55 or U52. You can test Q55 in-circuit with a DMM. See the following link for testing (game off):
http://www.pinwiki.com/wiki/index.php?title=General (just search for 2N6427)
You could also test the voltages at the two points I circled and compare to a working circuit. This is a pulsed circuit and best tested with a logic probe, but you should be able to spot the problem with a DMM.
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Banning, CA
Vancouver, BC