Help with Elka Rhapsody trouble

rharris07 · Post by **rharris07** » Fri Mar 12, 2010 10:54 pm

My Elka Rhapsody 490 string machine had been playing just fine, then out of the blue - it makes no sound!

It powers on fine, when I really hit the keys I'll get a bit of sound registered on my mixer (visible by a green light), but nothing is really heard.

Any ideas what could have caused this? How I might fix it?

Nothing has changed with it, I didn't move it...no animals, no smoke, no trouble at all prior to it acting up.

Any help would be greatly appreciated...

Post by **rhino** » Fri Mar 12, 2010 11:35 pm

1. double check external things,,,plugs, jacks, mixer levels, etc
2. signal-trace backward from the output jacks
3. check power supply

rharris07 · Post by **rharris07** » Fri Mar 12, 2010 11:43 pm

rhino wrote:1. double check external things,,,plugs, jacks, mixer levels, etc
2. signal-trace backward from the output jacks
3. check power supply

i checked power supply, no trouble visible.

checked the external stuff - mixer, jacks, etc. - everything is fine..works perfectly with other synths.

i plugged a pair of headphones into the output on the rhapsody and got some sound out, but even at the highest level its very faint, and only in mono....

any ideas??

Post by **Maschinengeist** » Sat Mar 13, 2010 1:01 am

I'd say op-amps or transistors. Hard to day which, I don't have the schematics.

rharris07 · Post by **rharris07** » Sat Mar 13, 2010 3:43 am

Maschinengeist wrote:I'd say op-amps or transistors. Hard to day which, I don't have the schematics.

both sound expensive for an old italian machine like this...i can't really find any data on this thing on the internets.

jeeroj · Post by **jeeroj** » Sat Mar 13, 2010 4:09 am

rharris07 wrote: I didn't move it...no animals, no smoke, no trouble...

you didn't 'look' at it did you? or think, "I really love that board"...?

sam · Post by **sam** » Sat Mar 13, 2010 9:01 am

Check the power board...On the right of the board are the dc connections (Several wires go to the positive and negative connectors....This should read 27v.

The far left board (master osc) works at 27v.

This is your starting point.

Post by **rhino** » Sat Mar 13, 2010 9:02 pm

iirc, the Elka does not have a headphone out. You would hear little/nothing using 'phones on the main out. At the least, you'll need a schematic and a signal tracer. Maybe time for a tech.

EDIT: Did you just get any new gear? Something the Elka would be jealous of ??? (lol)

sam · Post by **sam** » Sun Mar 14, 2010 7:48 am

If you give the dc readings on the power supply i can help here..I have just fixed a 490 and 610.

Help with Elka Rhapsody trouble

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