Hammond Model A, Manual, Page: 153 / 298

Pedal solo note does not sound on one pedal (with any combination of control
tablets). The control contact of that pedal is probably dirty and can be cleared by
adjusting the pedal busbar shifter as described in the section on manuals and
pedals. The same trouble may appear as an irregular sputtering or crackling of a
single pedal note.
This effect may also result from an open circuit in the pedal wiring, the pedal to
main generator cable, or the main generator wiring, since the control circuit is
completed through the main generator.
All pedals fail to play on one stop tablet. If all other tablets play correctly, the
signal from the oscillator or one frequency divider is not reaching the amplifier.
This may be due to a loose cable plug, a broken wire, or a dirty contact on the
tablet. In the latter case, refer to the following section, Procedure for Removing
Parts. The schematic diagram, figure 2, indicates which cable wire and frequency
divider correspond to each tablet. Figure 5 identifies the tablets and electrical
components in the control panel.
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