Pole Base Assembly (Supply Or Take-Up Side); Rotary Encoder - JVC HR-S3800U Service Manual

2.2.9 Pole Base Assembly (supply or take-up side)

1. How to remove
(1) Remove the UV catcher 2 on the removal side by loos-
ening the screw (A).
(2) Remove the pole base assembly on the supply side from
the mechanism assembly by loosening the screw (B) on
the mechanism assembly back side and sliding the pole
base assembly toward the UV catcher 2.
(3) As for the pole base assembly on the take-up side, turn
the pulley of the loading motor to lower the cassette
holder because the screw (B) is hidden under the con-
trol plate. (See the "Procedures for Lowering the Cas-
sette holder assembly" of 1.3 DISASSEMBLY/ASSEM-
BLY METHOD.) Further turn the motor pulley to move
the cassette holder until the screw (B) is no longer un-
der the control plate (in the half-loading position). Then
remove it as done for the supply side by removing the
screw (B).
NOTE: After reinstalling the Pole base assembly and the
UV catcher2, be sure to perform compatibility ad-
justment.
Screw(A)
UV catcher2
Fig. 2-2-19
Screw(A)
UV catcher2
Screw(B)

2.2.10 Rotary Encoder

1. How to remove
(1) Remove the screw (A) and remove the rotary encoder
by pulling it up. (See Fig. 2-2-20.)
Rotary encoder (Front side)
Screw(A)
Positioning pin of the rotary encoder
Fig. 2-2-20
Control plate
Shaft of the rotary encoder guide
Fig. 2-2-21
2. How to install (Phase matching)
(1) Make sure that the mark E of the control plate is in align-
ment with the mark M of the loading arm gear shaft and
bring the guide marks on the rotary encoder into align-
ment as indicated in Fig.2-2-20. (See Fig. 2-2-20 and Fig.
2-2-21.)
(2) Turn over the rotary encoder with its guide marks kept
in alignment and install it by fitting on the shaft of the
rotary encoder guide and the positioning pin.
(3) Tighten the screw (A) to complete the installation.
Guide marks
Rotary encoder (Back side)
Mark E
2-12