Re: Key contact cleaning

[bpb@bpbsn.cca.rockwell.com (Brad Baker)]

>>>>> "BB" == Brad Baker <bpb@bpbsn.cca.rockwell.com> writes:

>>>>> "Bill" == Bill Llewellyn <thinker@rahul.net> writes:

    Bill> I'm looking for recommendations/how-to's on disassembling
    Bill> the keyboard area and cleaning out the contacts. Anyone
    Bill> successfully done this?

    BB> The service manual describes three procedures. A warning
    BB> against using the third procedure was given by a GOFF
    BB> spokesman in a Keyboard Magazine article.

    BB> 1. Repeatedly strike the offending key 15 to 20 times rapidly
    BB> in succession.

    BB> 2. If that doesn't work then turn the bus-bar shifter a couple
    BB> of turns in either direction WITH NO KEYS DEPRESSED.
                                     ^^^^^^^^^^^^^^^^^^^^^^
I got to thinking about this (I've never tried it) and you should also
release all the presets as well; they work the same as regular keys
do, just with different connections. Otherwise, under the worst case
scenario, the shifting of the busbar might saw through the contact
wire on the depressed preset.

    BB> 3. If that doesn't work then depress one octave's keys, black
    BB> and white, down with a board and rotate the busbar
    BB> shifter. THIS IS NOT RECOMMENDED. If the bus bars are notched
    BB> or otherwise damaged below the key contact then shifting the
    BB> bus bar can saw through the wire that comprises the
    BB> contact. (Third hand information from a GOFF spokesman via
    BB> Keyboard Magazine article).

    BB> Regards,

    BB> Bradley Baker bpb@mlb.cca.rockwell.com

Regards,

Bradley Baker
bpb@mlb.cca.rockwell.com