Gibson Electric guitar Owner's Manual page 41

Function MCK Position
MCK is now in the
Intonation Mode
position of the string
you are intonating.
Display LEDs Action
I LED shining blue
For each green LED
turn the screw half
turn clockwise
For each red LED
turn the screw
half turn counter-
clockwise
39
Remarks
Now a colored blink
code displays the
appropriate correction
for the intonation screw.
For example:
= 5 half turns
clockwise
For example:
= 6 half turns counter-
clockwise
Repeat Intonation
Mode for each string.
A correctly intonated
string is indicated by a
blue LED.