1 Nov
2012
1 Nov
'12
5:19 a.m.
On Thu, 1 Nov 2012, David Riley wrote:
On Nov 1, 2012, at 1:24, David Griffith <dgriffi at
cs.csubak.edu> wrote:
Almost certainly dried-up bypass caps in the analog circuitry. Plan on
honing up your SMD rework skills and replace all of them.
See:
http://www.biwa.ne.jp/~shamada/fullmac/repairEng.html
for some valuable troubleshooting tips.
Unless you're a real wizard with a hot-air pencil, there are at least a
few that are easier to replace using radial-lead packages with the leads
bent out 90-degrees. In retrospect, I probably should have done all of
them that way the last I went through this exercise.
Steve
--
I have a well-treated Macintosh SE/30 that I'd like to fix up.
Problem 1) Whenever the CPU is doing something or something is being
read or written, faint warbling screeches can be heard coming from
inside. The volume control does nothing to quell this noise.
I've had a number of machines that did that; I guess it's just
microphonics on the bus lines. It's not harmful, though I
guess it could be annoying. I always thought of it as a
crude CPU activity meter. :-)