30 Nov
2005
30 Nov
'05
1:51 p.m.
The burned out resistors wouldn't have had anything to do with the blown
flyback or the shorted components I replaced on the video board?
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Chuck Guzis
Sent: Wednesday, November 30, 2005 3:18 PM
To: cctalk at classiccmp.org
Subject: Re: More parts I need to replace on the VT100
On 11/30/2005 at 11:25 AM Dwight K. Elvey wrote:
Many IC's and transistors show little to no
visual
indications that they are shorted inside. I don't
know how one can find these without understanding
where the resistors are in the schematic and how
the resistors are being used.
Actually, many servicepeople rely on compiled tips for servicing.
Something like "If there's no vertical sweep, replace R302, Q401 and
C213".
And with a lot of modern gear, manufacturer's schematics are almost
useless, where signals disappear into a house-numbered chip with no clue
as
to the function or pinout on said chip.
I confess that I've used the Euras technical database several times. For
the $5 for a 14-day ticket, it's not a bad deal and usually makes short
work of diagnosing problems on TVs.
That being said, I agree with your statement about how burned resistors
are
usually a symptom of a shorted component somewhere else.
Cheers,
Chuck