Sharp VL-H870U, Service Manual

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5-8
VL-H870U
VL-H875U
VL-H890U
VL-H870U
VL-H875U
VL-H890U
5-5-2. Cassette control ass’y
<Disassembling>
(1) Set the unit to the EJECT mode, and let the housing stand upright. Or set the
unit to the STANDBY mode, press the lock lever in the arrow direction, and
let the housing stand upright. (See Fig. 5: in the direction
a or b ) (When
pushing in the direction a , slightly lift the housing by hand to release the lock
lever.)
(2) Remove the four screws
2
and take out the down guide
3
.
(3) Slide the two link support shafts c and the two roller shafts d to the round
openings
g
on their respective slide chassis slits (two at
e
and two at
f
).
(4) Deflect the roller shafts d a little inward to get them out of the round openings
g
on the slide chassis. (Be careful not to deform the inner links.)
Lock Lever
Down Guide
c
i
b
j
a
Screw
Figure 5. Lock lever section
Figure 6
5-5-3. Actuating the mechanism with the cassette control ass’y removed
(1) Turn on the power supply with the cabinet and camera unit
removed, referring to the Service Manual (so as to actuate the
mechanism).
(2) Put the cap on the light guide.
(3) Press the cassette control down switch through the adhesive
tape in the arrow direction so as to turn it on. At this time take
care to avoid contact with the cassette. Keep the switch
pressed (if the switch is turned off, unloading occurs).
Note: To set the Rec mode, press the pin (marked with the
asterisk *) of recognition switch (this operation is not
necessary in other modes).
(2) Drum motor stator
Remove the stator
mounting screw with
the hexagonal wrench
as shown in Figure 2,
remove the motor
stator.
5-5-4. Drum and Drum base
<Removal>
* To replace the upper drum, be sure to put on gloves. Due care is required so that the drum is not damaged.
(1) Drum base
Remove the 3 mounting
screws as shown in Figure 1,
and remove the drum base.
Figure 2
1
d
f
m
4
m
l
d
k
n
e
e
2
2
2
2
3
i
i
g
f
g
r
c
c
Mounting
screw
Drum base
Upper/lower drum ass'y
Positioning
hole
Earth spring
Figure 1
Upper/lower
drum ass'y
Motor stator
Stator mounting
screw
Phase matching
hole
<Reassembling>
(1) Set the unit to the STANDBY mode.
(2) Deflect the roller shafts
d a little inward, and fit them
into the round openings
g
on the slide chassis. (Be
careful not to deform the inner links.)
(3) Align the flanges of roller shafts d with the slide chassis
slits f . While sliding the flanges, fit the support shafts
c in the slide chassis slits e , and slide them until they
reach the slits.
(4) Attach the down guide. (While pressing the guide in the
direction i , tighten the screws until the gap j be-
tween the down guide
3
and the support shafts c
becomes zero.)
Tightening torque: 70
±
7 mN·m (0.7
±
0.07 kg·cm)
Screw tightening
torque (4 locations)
0.069
±
0.007 N·m
(0.7
±
0.07kg·cm)
Recognition switch
Cap
Cassette control
down switch
Light guide
Adhesive tape
*