2-9
2. How to install
(1) Clean the coil parts of the lower drum assembly and the
newly installed upper drum assembly with an air brush
in advance. (See Fig.2-2-19b.)
(2) Install a new washer and upper drum assembly on the
drum shaft. (See Fig.2-2-19a.)
(3) Install the cap to the upper drum assembly.
(4) Position the collar assembly as indicated in Fig.2-2-19c
while controlling its up- down movement.
(5) Secure the collar assembly in position with a hexagonal
wrench while pressing its top with the fingers.
(6) After installation, gently turn the upper drum assembly
with your hand to make sure that it turns normally. Then
install the brush and the spring.
(7) Install the rotor assembly and stator assembly according
to Fig 2-2-17a and 2-2-18a.
(8) When installation is complete, clean the upper drum as-
sembly and lower drum assembly and carry out the fol-
lowing adjustments.
•PB switching point adjustment
•Slow tracking adjustment
•Compatibility adjustment (Be sure to check for compat-
ibility for the EP (or LP) mode.)
Fig. 2-2-19a
Fig. 2-2-19b
Spring
Brush
Cap
Upper drum
assembly
Washer
Lower drum assembly
Shaft
1.5 mm
hexagonal wrench
Loosen
Collar
assembly
Upper drum assembly
Coil parts
Lower drum assembly
Fig. 2-2-19c
Fig. 2-2-19d
Collar
assembly
Upper drum
assembly
Tighten
Collar
assembly
Press
2.3 Installation of major parts (Mechanism phase align-
ment)
2.3.1 Before assembly
The mechanism of this model is closely related with the ro-
tary encoder and the system control circuitry. The connec-
tion between the rotary encoder and control cam determines
the movement of all mechanical parts including the slide
plate, loading arm assembly, control plate and brake. If these
parts are not installed in the correct positions, operations such
as loading and unloading will not be possible.
Installation of the major parts (mechanism phase alignment)
should be performed exclusively in the mechanism assem-
bling mode, as with the operations in the previous sections.