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Korg TR88 Service Manual page 15

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TR61/TR76/TR88 TEST MODE
How to start the test mode
ENTER+5+POWER ON : FULL TEST(61/76Key)
MENU+5+POWER ON : FULL TEST(88Key)
ENTER+2+POWER ON : OMIT THE INERNAL TEST
How to operate the test mode
ENTER : PROCEED THE TEST
VALUE▲ : ITEM UP
VALUE▼ : ITEM DOWN
FF : STEP UP
REW : STEP DOWN
NOTE:
When the test mode starts, the calibration values of Joystick and Aftertouch are reset.
When the test mode is proceeded in order, please take the calibration at each item.
While operating the internal test, turning the Rotary encoder enables you to adjust the
contrast of the LCD but the indication might not appear since the data update of the
contrast cannot follow on time. So when adjusting the contrast, please do that after
finishing the internal test.
*Conditions when starting the test mode
-Use a write-protected SD_CARD.

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