Hello Stefano,
The good news is, it¡¯s probably just a capacitor, the bad news is you must unsolder and replace a component on the voice circuit board. If you don¡¯t feel comfortable soldering on a circuit board you might want to find an experienced tech.
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The following notes are in reference to the Xpander Service Manual available on the Xpantastic
forum.
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The most common part to fail /replace is Cx49.? This fail happens so often I have written a small service note for it.
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It is a 2.2 uF ?25V electrolytic capacitor.
The schematic is on page 27 of the Xpander Service Manual.
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Your looking for part number Cx49
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There is one each of these parts for each voice
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the x in the designation will be one of a 2 - 7 number. However, The numbers are not
the same as the voice number.?
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??????????? Voice 6 = C249 *?? Replace this one
??????????? Voice 5 = C349?????????
??????????? Voice 4 = C449?????????
??????????? Voice 3 = C549
??????????? Voice 2 = C649 ????????
??????????? Voice 1 = C749
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Note that each part in that voice will have the same prefix ex.?? C2xx? or U2xx for voice 6
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Parts Placement Drawing = Page 77 and 78
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Notice the parts for each voice are located in a strip which runs verticle down the circuit board.?
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Look to the bottom lefthand corner of the circuit board.
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Inside the Voice circuit notice an 8 pin chip with a designation of Ux16
The capacitor is located right next to the bottom lefthand corner of this chip.
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You can recognize them as a small electrolytic capacitor. The part designation
is printed right next to it.
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Polarity must be observed. but you probobly knew that.
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Best Luck
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Sent from for Windows 10
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Hi everyone! Unfortunately I¡¯m writing here because my Xpander has some problem. Every test on voice 6 fails. VCO, PW, RES, VCF and VCA. So I suppose it¡¯s not a CEM problem because it would fail only 1-2 test, or a power supply problem, because in this case it would affect all the voices.
I¡¯ve swapped some IC, but the problems remain on the same voice. Please could you tell me and confirm me the the first one on the left is the voice 6 and the last one on the right the voice 1?
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Thank you very much,
Stefano
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