Hammond Organ L-100 Series, Руководство по обслуживанию

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Page 34
4–7 L–100–1 SIX-VOICE PERCUSSION PERFORMANCE
CHECK AND TROUBLESHOOTING
4–7–1 OUTPUT LEVEL ADJUSTMENTS
The rhythm volume levels are set at the factory, and will normally
require no adjustment. In case it is found necessary to rep lace a
part on the rhythm board, 124–000114, adjustment will be required.
To adjust output levels, proceed according to the following. A
multimeter, oscilloscope, or equivalent is required. See
Figure 5–4
for locations of controls.
a. Set all tabs and rocker switches to “up” or “off” positions.
Set swell pedal and RHYTHM VOLUME control to maximum
output. Connect multimeter across main speaker leads.
b. Press CYMBAL push button at about 5 times per second.
Adjust R113 to obtain a meter indication of 2.2 to 2.8 V rms.
c. Press BRUSH push button at about 5 times per second.
Adjust R126 to obtain a meter indication of 2.2 to 2.8 V rms.
d. Press TOM-TOM push button at about 5 times per second.
Adjust R134 to obtain a meter indication of 1.3 to 1.7 V.
4–7–2 ONE VOICE IS SILENT
Check the following:
a. Connection to corresponding pin of PWB, 124–000114. See
Figure 5–4 .
b. If connections are okay, check for +15VDC at pin when push
button of missing voice is held down.
c. If voltage is missing, check connections to push button
switch, rocker tab, and rhythm power supply.
d. If voltage is present, trace associated voice circuitry.
NOTE 4–7–D–A
If failure is in Brush and/or Cymbal voice, check Q101.
4–7–3 PROGRAMMED VOICE DOES NOT SPEAK
If any voice speaks when push button is pressed, but not from
programmed source (manual or pedal, as applicable), check rocker
switch and associated wiring. See paragraphs
4–7–6 No Voice
Response From Pedals and 4–7–7 No Voice Response From
Manual as well.
4–7–4 ALL PERCUSSIVE VOICES SILENT—HISS VOICES
SPEAK
Check Q107, Q105, and associated circuitry.
4–7–5 BOTH HISS VOICES SILENT—PERCUSSIVE VOICES
SPEAK
Check Q106 and associated circuitry. Check Q101.
4–7–6 NO VOICE RESPONSE FROM PEDALS
Check pedal keying pulse circuits (cf. 2–8–4 Pedal Keying Circuit ).
4–7–7 NO VOICE RESPONSE FROM MANUAL
Check manual keying pulse circuits (cf. 2–8–3 Lower Manual
Keying Circuits ).
4–7–8 NO PERCUSSION OUTPUT
Check con nections to percussion power supply. Check power
supply outputs.
4–7–9 TROUBLESHOOTING
The following sections describe troubleshooting techniques for the
L–100–1 Six-Voice Percussion system.
4–7–10 ORGAN DOES NOT PLAY
If the generator motor is not turning and the tubes do not light
when the switch is in the “on” position, check the power wiring,
power switch, line cord, line cord plug, and wall outlet.