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Capstan Motor; Pole Base Assembly (supply Or Take-up Side) - JVC HR-J271MS Service Manual

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Loading motor board assembly
Loading motor
Worm gear
Fig. 2-2-7a

2.2.8 Capstan Motor

1. How to remove
(1) Remove the belt (capstan) on the mechanism assembly
back side.
(2) Remove the three screws (A) and remove the capstan
Fig. 2-2-8a
Fig. 2-2-8b
Motor guide
6.5 ± 0.2 mm
Motor pulley
Capstan motor
Connector for
the capstan motor
Digitized in Heiloo Netherlands
2. How to install (Centering the mounting position)
When the capstan motor has once been removed and then
reinstalled out of the initial correct position in the rotational
direction, the capstan motor current may be unstable during
operation in high or low temperatures. This may result in
greater Wow & Flutter and occasionally in power breakdown
because of current over - load. Install the capstan motor while
following the procedure given below.
(The capstan motor is centrally located when the unit is
shipped from the factory.)
(1) Provisionally tighten the three screws (A) securing the
capstan motor.
(2) Install the mechanism assembly to which the capstan
motor is provisionally fastened on the bottom chassis
which incorporates the Main board assembly. (No need
to tighten the screws for mounting the mechanism.)
Make sure that all the connectors for the mechanism as-
sembly and the Main board assembly are correctly in-
stalled as indicated in Fig. 2-2-8b.
(3) Making sure that the connector for the capstan motor is
correctly mounted, and securely tighten the three screws
• When the capstan motor has been replaced with a new
one, perform recording in the EP(or LP) mode for at
least 2 minutes at normal temperatures immediately be-
fore starting the FF/REW or SEARCH operations (Ag-

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 Cassette
holder assembly" of 1.3 DISASSEMBLY/ASSEMBLY
METHOD.) Further turn the motor pulley to move the cas-
sette holder until the screw (B) is no longer under the con-
trol plate (in the half-loading position). Then remove it as
done for the supply side by removing the screw (B).
• After reinstalling the Pole base assembly and the UV
catcher2, be sure to perform compatibility adjustment.
UV catcher2
UV catcher2
Fig. 2-2-9a


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