Gibson Guitars 1550-07 GUS - Manual (Page 40)

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Function MCK Position Display LEDs Action Remarks
Intonation Mode Activate Intonation
Mode by pressing
the display for 3
seconds.
Strum one of the
strings until the
according LED
shines green.
For example, D.
After 2 seconds b
LED turns off and #
LED shines green
Pick the same
string now in the
12th fret and
strum it.
I LED shining blue
INTONATION MODE (ONLY GIBSON MODELS)
Pull MCK out and turn
to | LED
Before starting the Intonation Mode we recommend to perform Normal tuning 440Hz