Ricoh GR-C1 Series Service Training page 130

Color Skew Adjustment (2)
Open the front cover [A].
Remove the upper cover [B]. Then close the front cover again.
Execute 'MUSIC' (SP2-111-002) again.
This is because removing the upper cover may have caused the
LD units to slip out of alignment.
Never try to do the color skew adjustment while the upper cover
is attached.
Otherwise, the LD unit may move, and you may have to adjust the
color skew again.
Slide 130
130
GR-C1 Training