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Alesis Vortex Wireless 2 Service Manual page 34

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Diagnosis
After touch: Press hard any key on the keyboard until the value reaches "127", release your hand, the
value will reach 0 and it will switch to the next controller "Acc". (The display will temporarily show "Acc",
then show the accelerator value.)
Accelerator: Stand the keyboard up vertically and the value will reach "127", then put the keyboard flat
on a table, the value will reach 0 and the display will show "PAS".
Notes:
If the display reports an error by showing "Err", the test will stop and wait until the problem is fixed.
Once starting the ADC test, you cannot switch to another test until all items are passed in the ADC
test.

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