( ) Push home all drawbars(including master controls).
( )Set the "Wah Wah" and "Slalom" controls to their right-hand stops.
( )Set the transposer to "C" (normal pitch).
( )Set the master pitch control (on AP 1) to the center of rotation.
( ) Depress the swell pedal completely.
( )Push the programming switch "Cancel" (if applicable).
3.3 First-Time Power On
Important
: There will be AC line voltage present from now on at various
locations in the organ. Keep your hands away from the AC line connector, power
transformer, AC toggle switch and pilot light.
( ) Turn on power to the organ for a few seconds only. Quickly scan the
instrument with your eyes and nose on the lookout for smoke. The power
amplifier may hum and hiss slightly and even a few faint sounds may be heard.
But there should be no July 4 spectacle taking place.
( ) If everything seems to behave in an orderly manner
check the power supply voltages (+ and -15 V D C).
[ ] In case of trouble at this stage remove the supply lines at the subunits
throughout the organ one by one (but positive and negative lines simultaneously)
to isolate the culprit. Keep notes of what you are doing such that you can restore
the instrument after locating the problem.
( ) Confirming test for operating power supply, tone generator and power
amplifier: Hold a finger of one hand to the terminal "E" of the power amplifier (tip
of phone plug of the external amplifier with W 1 T models). The amplifier will hum
now. Run a finger of the other hand along the foil side of the circuit boards G 2 of
the tone generator. Tones should be heard besides all other noises.
( ) Jam a key of each manual in the depressed position. While holding on to the
amplifier terminal, touch the terminals "SQ" or "SIN" of the keyer block. Again,
tones at various pitches should be heard.
3.4 Testing of the L/Man Drawbars
( ) Set all trim pots on the preamplifier to their centers of rotation.
( ) Pull the 4 drawbars of the lower manual out half way.
( ) Jam a key in the center of the lower manual in the depressed position. There
should be no audible sound yet.
( ) Clip the test lead to plug 4, terminal S 2 of the preamp. The drawbar signal
should appear on the speaker.
( ) If no tone is heard touch the terminal E 2 (plug 3) of the preamp with one hand
(use a short piece of wire to reach down into the rear opening of the connector)
and touch the input pins on the L/Man drawbars with your other hand. You
should hear the 4 different pitches of the lower manual. If not, the problem is
located on the preamp. Check AM 540 and find which IC's are responsible for the
input gating of E 2/S 2. Swap IC's of like types.
( ) Push all drawbars home. The sound mixture will disappear. Pull out single
drawbars (L/Man) one by one and check for proper sequence of the pitches.
3.5 Testing of the U/Man Drawbars
( ) Clip the test lead to plug 4, terminal S 4 and repeat the tests for the seven
footages of the upper manual. The audio signal now is applied to input E 4 of the
preamp. Of course, a key of the upper manual has to be depressed.
3.6 Testing of the Envelope Control
The operation of the 4 envelope control switches can be tested by using the
drawbars of the upper manual.
AM 071 (Part)
6
