5.1.3 Cleaning the Head Shield Screw
Perform this procedure once every 6 months or if the shields should become
noisy or move erratically.
1. Turn the power off and open the VU Meter Panel.
2. Using a lint-free cloth, wipe off the screw (worm) shaft in the center of
the head shield mechanism and the two smaller guide shafts on either
side of that screw (Figure 5-1). To again access all areas of these parts,
turn the power on, place the transport in Stop mode and press the
SHIELD button. Turn the power off again.
3. Apply a light coating of utility oil onto the two shafts and the screw.
Figure 5-1
Head Shield Screw and Guide Rails
HEAD SHIELD
SCREW (WORM)
GUIDE SHAFTS
Section 5 Maintenance
5 - 4
October 1990
MTR-90III Operation and Maintenance Manual
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