Sega type twin F355 - Manual (Page 59)

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Monitor adjustments have been made at the time of shipment. Therefore, do
not make further adjustment without a justifiable reason. Adjusting the
monitor which contains high tension parts is a dangerous work. Also, an
erroneous adjustment can cause deviated synchronization and image fault,
resulting in malfunctioning.
When making adjustment, utilize a resinous Alignment Rod. Servicing with
bare hand or using conductive tools can cause electric shock.
14 - 3 ADJUSTMENT METHOD
Remove the 2 screws from the Monitor Board Lid on top of the monitor, and the Adjustment
Board appears.
For adjustment, use the Resinous Adjustment Rod.
FIG. 14. 3
Monitor Board Lid
TRUSS SCREW(2)
blackM4 X 10
PHOTO 14. 3