Teac MT-20D-IO Maintenance Manual page 188

4-4-6 Replacement of encoder Ass'y, encoder roller
(1) Articles to be used
(a) Phillips screwdriver No. 0
(b) Phillips screwdriver No. 1
(c) Hexagonal wrench
(d) Tweezers
(e) Tilt adjusting jig
1.5
mm
(f)
Other articles required in "Check and Adjustment" item
(2) Replacement procedure
(a) Detach the protector guide in accordance with Item 4-2-3.(1).
(b) Detach the PCBA Interface Control in accordance with Item 4-4-10.
(c) Push down the encoder roller with the finger.
(d) Extract the encoder roller from the shaft of the encoder Ass' y.
(Fig. 443)
(e) Extract the connector J10.
(f) Cut with the nipper the cable tie, which clamps the cables between
the solenoid stopper and bead (Fig. 436).
(g) Remove the two mounting screws from the encoder Ass'y, and detach
the encoder Ass'y, encoder spring, and pin spring (Fig. 444).
(h) At tach the new encoder Ass' y in the reverse procedure to the
above. Then. turn the cap screw until the shaft of the encoder
Ass'y is placed nearly at the right angle to the mounting surface.
(i) Insert the tilt adjusting jig into the encoder shaft by sliding it
(Fig. 445).
(j) Turn the screw until the bottom face of the tilt adjusting jig is
in close contact with the chassis (Fig. 446).
(k) Insert the new encoder roller into the shaft, and push up the
encoder roller until its top face agrees with the top face of the
shaft. At this time, be careful not to make the flange of the
roller touch the holder base.
(1)
Connect the connector J10.
(m) Clamp the cables of the encoder Ass' y bet\.een the beads and
solenoid stopper, and push them into the PCBA holder.
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