Hitachi VM-H620A - Manual (Page 54)

Advanced Techniques - 54 -
Viewfinder Bright, Color and Tint Control (Only for VM-H720A)
This small "BRIGHT", "COLOR" and "TINT" controls are set at the factory and should require no
adjustment. If they ever require adjustment, use a plastic screwdriver. Make the adjustments with
caution to prevent damaging the miniature controls.