( ) Clip the test lead to terminal S 4 of the preamp. This activates the drawbars of
the upper manual.
( ) Turn on the switch "Soft Attack" (upper left cheek block). When depressing a
key on the upper manual the tone buildup should be slower than before.
( ) Turn on the switches "Short Sustain"; "Medium Sustain" and "Long Sustain"
successively. The tone decay after the release of a key should become
progressively longer.
( ) Should any of these functions not operate properly fasten a second test lead
to -1 5V of the power supply and clip it directly to the pins "Att. soft's "Sustain
short", "Sust. medium" or "Sust. tong" on H K 13 of the upper manual.
If the envelope modes now are working okay the problem will be found in the
wiring (see wire list). If not the trouble is located on the envelope control boards
H K 13 or H K 12 of the upper manual (though they were tested previously).
Testing of the Fixed Stops of the Lower Manual
( ) Jam a key of the lower manual in the depressed position.
( ) Turn on a few fixed stops of the lower manual.
( ) Pull the volume control "L/Man " out mid-way.
( ) Push the connector from the harness G O 1 onto the pins of "Plug 2 " (GP 1 of
lower manual).
( ) Clip the test lead to pin S 1 of the preamp. The selected fixed stops will now
be audible.
( ) Check the presence of all fixed stops and compare the sound character with
the list below:
3.6.1 Fixed Stop Voices of the Lower Manual
1. Viola 8': Bright, rich in harmonics.
2. Principal 8': Broader spectrum than Viola 8; but still rich in harmonics.
3. Horn 8': "Hollow" sound.
4. Violin 4': Same as Viola 8' but pitched one octave higher.
5. Principal 4': Broader spectrum than Violin 4; but still rich in harmonics.
6. Nasat 2-2/3': Sounds one fifth higher than the 4' stops (G appears on a c- key).
This is a fill-in voice (not a solo stop) and sounds softer than the other 4'stops.
7. Principal 2': Same as Principal 4' but pitched one octave higher.
8. Salicional 2': Louder than the Principal 2'andsomewhatpiercing.
3.7 Testing of the Fixed Stops of the Upper Manual
( ) Jam a key of the upper manual in the depressed position.
( ) Turn on a few fixed stops of the upper manual.
( ) Pull the volume control "U/Man" out mid-way.
( )Push the connector from the harness G O 1 onto the pins of "Plug 2 " (GP 1 of
upper manual).
( ) Clip the test lead to pin S 3 of the preamp. The selected fixed stops will now
be audible.
( ) Check the presence of all fixed stops and compare the sound character with
the list below
3.7.1 Fixed Stop Voices of the Upper Manual
1. Cello 16': Rich full sound with plenty of harmonics.
2. Horn 16': Hollow sound.
3.Trom bone 16': Powerful and broad sound, becoming "buzzy" at the lowest
octave.
AM 071 (Part)
7
