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Xpander is skipping a voice

steve_gruskin All Messages By This Member #969 I've had my Xpander since 1985 and for the first time had a Voice Processor Error message. I re-set (start w/ Clear button) and now it sounds fine, but is skipping voice 3. Any thoughts? Should I do another re-set or is there another software cure for this? Thanks very much!
Karl Schmeer All Messages By This Member #970 Hi Steve, From what I understand, the Xpander will turn the voice off if it fails tuning.? You can turn it back on in the master page if you need to. Unfortunately I believe you have a hardware problem.? The good news is, it's probably an electrolytic capacitor in the voice 3 circuit.? The usual suspect here is C549 a 2.2 uF 50 VDC electrolytic capacitor. BTW Given the vintage of these synths it's a good idea to recap the whole thing if possible. Best Luck Karl Schmeer toggle quoted message Show quoted text From: steve_gruskin <steveg@...> To: xpantastic@... Sent: Sun, March 4, 2012 7:38:19 PM Subject: [xpantastic] Xpander is skipping a voice ? I've had my Xpander since 1985 and for the first time had a Voice Processor Error message. I re-set (start w/ Clear button) and now it sounds fine, but is skipping voice 3. Any thoughts? Should I do another re-set or is there another software cure for this? Thanks very much!
Tobbe Bergman #971 Has your units?power board?been recaped since 1985 ? (the big capacitors) 2012/3/5 steve_gruskin <steveg@...> toggle quoted message Show quoted text ? I've had my Xpander since 1985 and for the first time had a Voice Processor Error message. I re-set (start w/ Clear button) and now it sounds fine, but is skipping voice 3. Any thoughts? Should I do another re-set or is there another software cure for this? Thanks very much!
Tobbe Bergman #972 Just as?Karl Schmeer mentioned? the CX49?is?a common?capacitor?that fails on every voice. It also failed on my 6th voice but after replacing it, it was back to normal. As I mentioned before it's a good idea to recap as much as you can inclusive?the power board caps. ??? 2012/3/5 steve_gruskin <steveg@...> toggle quoted message Show quoted text ? I've had my Xpander since 1985 and for the first time had a Voice Processor Error message. I re-set (start w/ Clear button) and now it sounds fine, but is skipping voice 3. Any thoughts? Should I do another re-set or is there another software cure for this? Thanks very much!
joigaloid9 All Messages By This Member #980 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.
synthparts All Messages By This Member #981 I have a few of those chips in stock. Doug synthparts.com toggle quoted message Show quoted text --- 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.
c_janot All Messages By This Member #985 Hi to all ! I'm still looking for detailled hi-res pictures of an Xpander electronics boards. So, if someone had to open his box... Thank you Envoyé de mon iPhone
random2393 All Messages By This Member #986 chris, I can take some for you. I have a US model. I'm assuming you just need pictures of the boards in their current mounted state inside the case. If you need both sides of each board then thats a lot more involved and I don't think I'm gonna be able to help you on that. -omar --- sent from iPhone toggle quoted message Show quoted text On Apr 2, 2012, at 1:01 AM, Christophe JANOT <cjanot@...> wrote: ? Hi to all ! I'm still looking for detailled hi-res pictures of an Xpander electronics boards. So, if someone had to open his box... Thank you Envoyé de mon iPhone
c_janot All Messages By This Member #987 Both sides will be fantastic, but difficult to realize ;-) Photos of composants sides will be great. So of you could tale pictures of processor and the voice board with different angles it will be great. Regards, Christophe
steve_gruskin All Messages By This Member #1013 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 toggle quoted message Show quoted text --- 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.
Karl Schmeer All Messages By This Member #1014 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.

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