[TechAssist] Re: Curtis Mathes A2647RK chassis C87-7 HOT failure

Filter Cap at Horiz. Drive Transformer

Peggs

At 01:05 PM 4/30/03, Leonard G. Caillouet wrote:

>This one is blowing horizontal outputs (2SD1427) after running a couple of
>hours or days.  Output timing is good, waveform stable, does not get hot,
>caps test ok, B+ is 130V and stable.  Any history on this oldie...customer
>wants it fixed for sentimental reasons and likes the cabinet.
>
>I found nothing in the archives or tips pages.  This was one of the NEC
>chassis from 1986 with the socketed chips.  I have seen lots of these with
>bad connections at the sockets causing other problems.  Anyone ever have it
>cause output failures?  I cleaned them and monitored the output and never
>saw it change until it quit.
>
>No problems with pix or sound when it is running, other than the CRT is
>aged.  Current draw was well under 1 amp.
>
>Leonard G. Caillouet
>Service Manager
>Electronics World
>Gainesville, FL
>352-332-5608
>352-332-5668 (fax)
>
>
>
>
>
>
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Peggs' Electronics
1519 West 2nd Street
Owensboro,KY 42301
270-926-4968
fax 270-686-7399
peggs@xxxxxxxxxxxxx

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