Hi Steve,
By far the most common?fail (besides maybe the memory backup battery and VFD
display)? has been the coupling capacitors.
Particularly the one?at the end of the voice signal chain:?Cx49. It needs to be
a?2.2 uF?polarized electrolytic capacitor
with a 50 VDC rating. If you use a smaller say 25V rating it will not work.?
These are very common and cost little.
Make sure to observe the polarity when replacing it.
They are all located along the lower edge of the circuit board.
C749 = Voice 1
C649 = Voice 2
C549 = Voice 3
C449 = Voice 4
C349 = Voice 5
C249 = Voice 6
Best Luck
Karl
________________________________
From: steve_gruskin <steveg@...>
To: xpantastic@...
Sent: Fri, April 6, 2012 1:17:46 PM
Subject: [xpantastic] Re: Xpander is skipping a voice
?
Thanks everyone for the advice. Sorry to take so long to respond. I'm getting
the FAIL tuning message on the filter and Resonance so tried swapping out the
filter chips and still failed on that voice. So does that mean it's a capacitor?
I really appreciate the advice -- thanks.
Steve
--- In xpantastic@..., Ed Koznofski <joigaloid9@...> wrote:
Sorry for being so late.? I had the same issue with my Matrix-12.? In the end,
I had to replace one of the CEM chips.
In the M-12 they are socketed, so it was not too difficult to troubleshoot by
swapping the chips between the bad voice and known working voices.
The bad news is the the CEM chips are hard to find, but they do turn up from
time to time.
