ASR-88 Keyboard
Pressure Response Problems
The ASR-88 keyboard, like the KT-88 and TS-12, has mono pressure response. This allows a
modulation effect to increase as you press harder on a key. Pressing harder on any key will affect all
other keys. To produce mono pressure, two pressure sensitive strips are inside the keyboard assembly.
Pressing on a key exerts a downward pressure on the strips. Two strips are used because of the large
88-
note span. The signals from the two strips are combined by the mono pressure circuit that resides on the
keyboard processor board that is mounted to the bottom of the 88-note keyboard near the wheel
assembly. Note that it is normal for pressure response to vary depending on the number of keys being
pressed.
If pressure response is not working properly, check the alignment of the pressure strips, and make sure
they are securely connected to the keyboard adapter board. Replacement of the pressure strips is not
practical on this keyboard assembly, if there is damage to the pressure strips, replace the entire keyboard
assembly.
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ASR Service Manual
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