Korg MS2000, Service Manual

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How to start/operate the test mode
[ON/OFF] + [1] + Power ON : Full test (Automatic measure mode)
[ON/OFF] + [2] + Power ON : Internal test is not executed
(No Preload, Automatic measure mode)
[ON/OFF] + [3] + Power ON : Full test (Manual test mode)
[ON/OFF] + [4] + Power ON : Internal test is not executed
(No Preload, Manual test mode)
[ON/OFF] + [5] + Power ON : After indicating the version number, the
MS2000/MS2000R normally function.
(No Preload)
[PAGE + ] or [16] : ITEM UP
[PAGE - ] : ITEM DOWN
[CURSOR >] : STEP UP
[CURSOR <] : STEP DOWN
Preload
[ON/OFF] + [REC] + Power ON
Note
The MS2000 takes the calibration of the wheel so please take the full test after
repairing it.
On the version 1.00, preload is executed as long as "Finish !" is indicated at the
last part of the test. So please do NOT turn off the power until "KORG" is
indicated.
(Preload is executed during the Flash ROM test.)
On the version 1.01 and beyond, preload is executed at the Flash ROM test.
So without executing the internal test, preload cannot be accomplished.