( ) Turn the master pitch control (underside of organ top) from stop to stop. The
overall pitch of the organ should vary by about plus and minus a halftone.
( ) Activate the right-hand foot switch en the swell pedal (W 1 T only: Postpone
this test until the swell pedal is connected). The pitch should drop rapidly by
about a half-tone and return slowly to normal. Premature release of the "Hawaii"
switch causes the pitch to return more rapidly. If you have the impression that the
pitch stays slightly "flat" while the footswitch remains deflected you have a good
ear (the pitch is off by about one twentieth of a half-tone).
We no longer require the test lead. Remove it from the power supply.
3.10 Testing of the Selector Switches "Drawbars/Fixed
Stop"
( ) Push the connector from the harness G O 1 onto the pins of "Plug 1 " of circuit
board G P 1 L/Man (voicing board of lower manual).
( ) Turn on a few fixed stops in the lower manual.
( ) Pull a few drawbars of the lower manual.
( ) Push the connector for plug 4 on the preamplifier onto the pins.
( ) Set the volume control "L/Man" about mid-way.
( ) Hold a chord on the lower manual and alternate the positions of the tongue tab
"Drawbars/ Fixed Stops" of the lower manual. You should hear the drawbar
sound with the switch in the "up" position and the fixed stops in the "down"
position.
( )Turn on all fixed stops of the lower manual. Pull out all drawbars of the lower
manual.
( ) Hold down a key or chord on the lower manual. Alternate between drawbars
and fixed stops and balance the volume of the fixed stops with the one from the
drawbars by means of trim pot P 1 on GP 1 (L/Man).
( ) Repeat the entire procedure from the beginning of this paragraph Xl for the
upper manual.
3.11 Testing of the Wersivoice
( ) Push the 3 connectors from the harness G O 1 onto the pins on the
Wersivoice circuit board WV 7.
( ) Turn off any vibrato on the push buttons" Reverb/ Vibrato, etc".
( ) Select some bright fixed stops in both manuals and pull the drawbars for a
matching bright sound.
( ) The switches " Drawbars to Wersivoice" and "Fixed Stops to Wersivoice" (in
both manuals), when pushed down, assign the respective sounds to the
Wersivoice (The switch " Drawbars/Fixed Stops" pre-selects the tone sources).
The Wersivoice imposes a rather complex vibrato on the sound such that it
seems to emerge from rotating speakers or baffles.
The Wersivoice switches on the lower left cheek block are "off": In that case the
vibrato (Whirl) is at its normal intensity and at the fast speed.
( ) Set the trimpot P 1 (Output) on the Wersivoice circuit board WV 7 to the center
of rotation.
( )Find the position on P 2 (Input) on WV 7 where distortion occurs either using
all drawbars or many fixed stops. Then, back off the volume until the distortion
disappears.
( ) Now adjust P 1 (Output) such that the volume is the same in both positions of
the switch "Draw-bars to Wersivoice" (using drawbars of the upper manual).
( ) Hold a full chord, using drawbars in the upper manual. Turn on the rocker
switch "Fast/Chorale": The vibrato should be slow now (chorale speed).
( ) Turn the switch "Fast/ Chorale" off again. The vibrato speed should increase
slowly until it reaches the fast (normal) speed. The Wersivoice simulates the
inertial speed-up of mechanical rotators.
AM 071 (Part)
10
