Amplifone monitor and Zannen cap kit

Hi,

I have been working on my Amplifone monitor and have what really feels
like a stupid question regarding a cap kit. (I did call Zannen about
it and they couldn't quite answer the question so I'll ask here...). There
are two 100uf, 50V caps on the deflection board (c19 & c20) which were
included in the kit. The caps in the kit had an unfamiliar marking on
them for polarity. Instead of a "-" sign on the striped side of the cap,
it had "ce". I just assumed that was negative and installed it that way
but now I am wondering (and I don't want to re-fry my boards). When I
called Zannen, Aubrey just told me that the side with the short lead is
the negative side, which is a nice thing to know but too late for me. Does
anyone know if the side marked "ce" is the negative side?

I asked Aubrey some other questions, these were his answers (note that
they are paraphrased, not direct quotes):

  Q: Why replace the HV board's C1 and C2 (470uf, 50V) with 1000uf,
     50V caps?
  A: Better performance, don't worry about it.

  Q: Why replace C7, C8, C9, and C10 (.47uf, 50V) on the deflection
     board with 1uf, 50V caps?
  A: .47uf is non standard (implied no longer available). Don't worry
     about it.
   
Other questions.... I'm still not sure if my HV board is good and would
like to first test the monitor without it. Can I just run it with the
HV board disconnected and listen to the deflection board to hear if its
drawing vectors. I have had to put some work into the deflection board
because R31, R30, R28, R35, .... were fried (espcially R30, it was
completely toast, and burned a nice little hole in C13 and almost through
the board). This happened when I was running the machine without the HV
board attached and now I'm afraid of toasting the deflection board again.
Any comments on this? How should I go about testing?

Two traces have separated from solder side of the deflection board where
R30 burned. I have worked around it for now but is there a way to re-attach
these traces to the board?

Thanks very much. And thanks also to those who answered my preivious
Amplifone questions.

Dan R.
dras@sw.stratus.com
Received on Wed Nov 19 12:43:24 1997