Sharp VL-A10U Service Manual page 21

(3) Upper drum ass'y
(Both common type)
Remove the upper drum
ass'y from the lower drum
ass'y as shown in Figure 3.
At this time take care so as
not to lose the gap shim.
(5)-a Balancer
(former type)
Remove the balancer
mounting screw as
shown in Figure 5, and
remove the balancer.
Balancer mounting
screw
<Installation>
Install the upper drum in the reverse order of removal.
(1) Balancer
Mount the balancer to the upper drum ass'y with the balancer mounting screw. The screw tightening torque must be 0.1N·m
(tighting torque 1kg·cm). (Figure 5)
(2) Motor rotor, rotary transformer rotor ass'y
Clean the contact surfaces of rotor ass'y holder and upper drum ass'y, and ascertain that there are no contamination and flaws.
Next, adjust the phase so that the positioning pin of rotor ass'y is inserted into the positioning hole of upper drum, and tight fit the
rotor ass'y to the lower surface of upper drum ass'y (Figure 7).
Mounting screw hole
Rotary transformer
rotor
In this state put the motor rotor on the upper surface of upper
drum ass'y, and tighten the mounting screw. At this time make
sure that the head screw in the three places is visible through
the motor rotor hole (Figure 8). The screw tightening torque
must be 0.1N·m (1 kg·cm).
Head mounting
screw
Screw relief hole
Alignment position (3 pcs.)
Upper drum
ass'y
Gap shim
Lower drum
ass'y
Figure 3
(5)-b. Balancer
(bonded type)
For the bonded type of
drum, the balancer can-
not be removed.
Balancer
Upper drum
ass'y
Figure 5
Cleaning (shaded area)
(holder)
Positioning pin
L ch
Motor rotor
Mounting screw
Upper drum ass'y
R ch
(4)-a Motor rotor ass'y and ro-
tary transformer rotor
(former type)
ass'y
Remove the 2 rotor
mounting screws as
shown in Figure 4-a, and
remove the motor rotor
and the rotary trans-
former ass'y.
Rotor mounting
screw
Motor rotor
Positioning
hole
Positioning pin
Figure 4-a
(6) Lower drum ass'y
(Both common type)
Remove the FPC mounting
screw from the lower drum
ass'y as shown in Figure 6.
Rotary transformer
Rotor ass'y
Figure 7
Upper drum ass'y
Rotary transformer
rotor ass'y
Figure 8
21
VL-A10U/UC/UA/UW/T/K
VL-AH30U/UC/T
(4)-b Motor rotor ass'y
(bonded type)
Remove two screws fix-
ing the rotor as shown in
Figure 4-b, then remove
only the motor rotor.
Rotor mounting
screw
Motor rotor
Upper drum
ass'y
Upper drum
ass'y
Figure 4-b
FPC mounting
screw
Lower drum
ass'y
Figure 6
Positioning hole
To be aligned with
RTr rotor side position
pin.
Cleaning
Rotor mounting screw
Motor rotor