Troubleshooting & Maintenance
Scanner Tests
4-13
Wheels
To test the pitch and mod wheels, move the wheel up and down. An example of the expected
test results for the pitch wheel follows (your results may vary slightly):
At bottom:
PITCH WHEEL = 0
At center:
PITCH WHEEL = 128
At top:
PITCH WHEEL = 255
Adjusting the Pitch Wheel Center
If the scanner test results for the pitch wheel do not match the expected results above, the pitch
wheel may need to be adjusted.
1. Refer to the diagram below and identify the opening provided through the bottom
enclosure to adjust the pitch center.
2. Insert a small
fl
at head screwdriver, move the pitch wheel, and adjust the trimpot to read
the expected values (your results may vary slightly).
Figure 4-3
Bottom enclosure, trimpot locations
Keyboard
To test the keyboard, press any key. The key name and number will be displayed twice in the
LCD. The
fi
rst set of name and number is the test result for the front key contact switch and the
second is for the rear switch. An example of the expected test result for the Middle C key
follows:
KEY C4 60 C4 60
Pressing harder, the display will change to show an increasing range of pressure values from
about 20 to at least 246.
Adjusting Key Pressure Sensitivity
1. To adjust the key pressure sensitivity, refer to the diagram above and identify the
openings provided through the bottom enclosure to adjust the white and black keys.
2. Insert a small
fl
at head screwdriver, press any key (equivalent to a hard key strike), and
adjust the trimpot to the expected value (your results may vary slightly).
Keyboard
Rear panel
R3, Pitch Center
R14, White Pressure Range
R15, Black Pressure Range
