[TechAssist] Hitachi CU4601B (VP8X2 chassis) with intermittent luminance

I just came back from a customer's home for a Hitach CU4601B (VP8X2 chassis)
that has intermittent luminance. Another servicer referred the cutomer to me
as he was unable to locate the problem. I replaced several capacitors on the
signal PCB (C0132,C521,C502,C303,C304,C3015,C3016,C3301, and C3303
Note:C0132 was reading about 14.7mfd instead of 22mfd). Still almost always
there is no luminance. However, if I tap on the board with a screwdriver
handle, it does seem to be a connection problem most sensitive around
IC3301. I spent two hours resoldering that board and went over it with a
fine toothed comb and jeweler's goggles but still no luck. I did not have a
scope with me. I know the problem is on the signal board. My question is
does anyone have the part number for the signal PWB and know if it is still
available? And has anyone already been down this road? The set is on the
third floor so I want to repair it onsite.

Bob Waterman, CET®
Service Manager
Gemini Computer, TV, & Security Alarm Systems, Inc.
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxxxxxxx
geminitv@xxxxxxx


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