Wurlitzer 700, Руководство по обслуживанию, Страница: 13 / 33

KEY AND ACTIO� · : �EGULATION
Like the conventional piano
g
the regulation of the keys and action is
very important, and should only be undertaken by a tuner-technician
or a trained service mane
In the even� excessive 100isture in the air caases siuggish keys or
action centers, they should be corrected according to the instruc­
tions given in the Wur:i.itzer Piano Service ManuaL "Ease Keys" is
described on Pages 4 and 7
0
and "Shrinking Action Centers" is ex­
plained on Pages 12 and 16 of that manual. Before shrinking action
centers, turn the instrument on for several hours
o
The heat from the
amplifier may dry out the action sufficiently to make shrinking un­
necessa.ry
o
REGULATING PROCEDURE
1. LEVEL AND EASE KEYS
If key leveling is necessa�y� it can be done by removing
or adding paper punchings under the felt washers on the balance
railo (See Page 11 of Model 112 section
o
)
2. KEY DEPTH
The proper key depth is 13/32" measured at the front of
the white keys
o
If the key height is correct and the key depth
is shallow
n
it may be increased by rem::>ving material from the
bottom of the front of the white key
o
(See Fia. 700-R, for
method of reiroving key
o
) If the key depth ie to0 deep, paper
·punchings of the required thickness may be glued to the bottom
surface of the front of the keyo
NOTE - It is best to wait until the hammer let-off has been
adjusted before setting the key depth of the sharpso
If all the keys have a shallow depth, it may be better
to build up the balance rail either with paper punchings under
the keys, or shims under the balance railo
3o ADJUST CAPSTAN SCREWS (See Fig
o
700-H)
The capstan screws a.re adjusted so there is 3-13/16" from
the bottom of the key frame to the tips of the hammerso The
hammer tip line will be even when capstan screws are properly
adjusted. They are not at the point of lost rootion as was the
case in the Model 1120
4. LET-OFF ADJUSTMENT (See Figo 700-I and 700-J)
The hammer should let off 1/16" from the reed in the treble
and 1/8" in the bass
o
This is the ideal adjustment for light
touch.
700-12
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