Re: Hammond E-112 problems

[bobs@hopf.dnai.com (Bob Schleicher)]

>> 2. One drawbar does not work at all, and other drawbars do not play one 
>> key on the manual.
>> 
>
>Prob. one of the wires has come off from the drawbar in question. Very easy
>to fix with a soldering iron - take the back off, look at the back of each
>drawbar and if one lacks a wire, then reattach the one hanging near it :)
>The other prob. sounds a bit more serious - seems like a key contact isn;t
>being pressed down at all. Hard to comment on what to do without seeing it,
>but you could try removing the key and seeing if the contact underneath
>moves. I don;t know how to get a key off from an E, though...
>
>-- 
>         _=~~=_        Bevis Peters
>        {      }       bevis@apg.ph.ucl.ac.uk
>        {      }       (telnet 128.40.84.2 1414)
>         ~=__=~        APL has so few views, mine might as well be them.
>
>It may well be that a drawbar wire has come loose, however, on the E series
there are two other common problems.

1.      Signal for several drawbars is routed through the percussion
switches.  Hold a note down with the dead drawbar pulled out and push upward
on the percussion tabs.  If the harmonic returns, clean & adjust the switch
contacts.

2.      Signals from the manuals pass through MOLEX connectors.  Remove the
plug from this connector and clean the pins.  This may solve the problem.

The missing note problem might be an open or unsoldered cap. on the tone
generator filters, a shorted filter coil, an unsoldered or cold soldered
wire on the generator terminal strip, or if your unlucky, a bad generator
coil.  TREK II products makes a generator note replacement if this is the
case.  We can repair the original coil if you have the money !

Good Luck !

Bob S,