Low output signal on analog synth

[David Dunnett]

Anyone here have any idea how to diagnose and fix an analog keyboard with a
low signal output that's only coming through in one channel? Is there an
internal amplifier? Is it just the jack?

thanks!

 

[Ray L. Volts]

Anyone here have any idea how to diagnose and fix an analog keyboard with
a low signal output that's only coming through in one channel? Is there an
internal amplifier? Is it just the jack?

thanks!

Does it have a headphone jack, and if so, same symptom with phones?

 

[David Dunnett]

no headphone jack. but i did listen through headphones and had the same
problem.

 

[Ray L. Volts]

no headphone jack. but i did listen through headphones and had the same
problem.

How did you listen via headphones w/o a jack? Didja hook 'em up to the line
level outs?
Might help to know the model unit we're talking about. Most analog
keyboards I'm familiar with don't have built-in speaker drivers, but yours
could.

 

[David Dunnett]

It's a Roland SH-2000 monosynth. My headphones have a quarter inch adapter
so I just listened through line out (that's all there is).

I don't have an amp on hand right now, but the last time I hooked it up I
needed to turn the volume WAY up to hear anything.

 

[Ray L. Volts]

It's a Roland SH-2000 monosynth. My headphones have a quarter inch adapter
so I just listened through line out (that's all there is).

I don't have an amp on hand right now, but the last time I hooked it up I
needed to turn the volume WAY up to hear anything.

As this is a 70's synth, you may have some resistors that have increased way
out of tolerance. Would be a good idea to check the electrolytic caps as
well on a unit this old.