Sony SLV-E420CP / SLV-E420VC / SLV-E520CP / SLV-E520UX / SLV-E520VC Service Manual ▷ View online
5-22
3-15. WHEEL GEAR 2, MAIN CAM AND
MODE SWITCH
(See Figs. 3-15-1 and 3-15-2)
1) Refer to section 3-2 and remove the mechanism unit.
When you do this, make sure the mechanism is in
EJECT mode.
EJECT mode.
2) Refer to section 3-7-1, then remove the harness
mounting.
3) Remove the clamp
1
, then remove the wheel gear 2
2
.
4) Remove the washer
3
, then remove the main cam
4
.
5) After unscrewing the screw
5
, remove the soldering
from the terminal of the mode switch
6
.
6) Remove the clamp
7
, then remove the mode switch
6
.
ASSEMBLY NOTES:
1. Apply grease (VHJ-0100) to the shafts
8
,
9
and
0
, to
the teeth of the main cam
4
, and to the all over the
cam groove of main cam
4
.
2. When fitting the modes witch
6
, align it in
AB
order
as shown in Fig. 3-15-2. The alignment of the part
B
is
shown in Fig. A. Position the teeth of the mode switch
6
so that the sixth tooth space left of part
A
is aligned
with the triangular mark on the pinch cam gear
!¡
. After
aligning part
B
, refer to section 3-9-2 and check the
positioning of the mode switch, the pinch cam gear and
the pinch lift cam.
the pinch lift cam.
3. Beforehand, remove the soldering from the soldered
part of the MC-1 PWB assembly, in order to prevent the
mode switch
mode switch
6
being warped. Solder the mode switch
6
after tightening the screw
5
(See Fig. 3-15-1 ) .
4. Align the hole in the crescent slide
!™
with the hole in
the mechanism chassis, as shown at point
G
in Fig. 3-
15-2 (refer to section 3-16 and see the holes
5
and
6
in Fig. 3-16-1).
5. When fitting the main cam
4
, position the mode switch
6
and the front rack gear
!£
as shown at points
C
and
D
respectively in Fig. 3-15-2.
6. When fitting the gear wheel 2
2
, position the main cam
4
and the wheel gear 1
!¢
as shown at points
E
and
F
respectively in Fig. 3-15-2.
3
Washer
6
Mode switch
7
Clamp
5
Screw
4
Main cam
2
Wheel
gear 2
!¢
Wheel
gear 1
!£
Front rack
gear
9
Shaft
8
Shaft
0
Shaft
!™
Crescent slide
!¡
Pinch
cam
gear
Fig. 3-15-1
2
Wheel gear 2
!¢
Wheel gear 1
4
Main cam
!™
Crescent
slide
!¡
Pinch
cam
gear
gear
!£
Front
rack
gear
gear
6
Mode
Fig. A
6 5 4
3
2
1
Align at
B
Marks on mode
switch
switch
6
A
B
F
G
E
D
C
Tooth tip on
main cam
main cam
4
switch
Fig. 3-15-2
5-23
3-16.CRESCENT SLIDE
(See Figs. 3-16-1 and 3-16-2)
1) Refer to section 3-2 and remove the mechanism unit.
When you do this, make sure the mechanism is in
EJECT mode.
EJECT mode.
2) Refer to section 3-3-1 and remove the cassette mecha-
nism assembly.
3) Refer to section 3-7-2 and remove the capstan brake
assembly.
4) Refer to section 3-12-4 and remove the T soft brake
assembly.
5) Refer to section 3-13-1 and remove the T brake act
slide.
6) Refer to section 3-12-1, then remove the reel belt and
the reel pulley.
7) Refer to section 3-15, then remove the wheel gear 2
and the main cam.
8) Refer to section 3-13-2, then remove the wheel gear 1
and the brake control lever.
9) Remove the two screws
!¡
, then remove the crescent
mounting
!™
.
10) Remove the clamps
1
and
2
, then raise the right end
of the crescent slide
3
slightly. Slide the crescent slide
3
to the right until it comes away from the clamp
4
,
then remove it.
ASSEMBLY NOTES:
1. Apply grease (VHJ-0100) to the points
A
,
B
,
C
and
D
in Fig. 3-16-1, and to the crescent slide
3
shown in
Fig. 3-16-2.
2. Before fitting the crescent slide
3
, refer to section 3-13-
3 and align the arrow on the S brake act slide with the
arrow on the mechanism chassis. Then refer to Fig. 3-
17-3 and check that the S load gear and the T load gear
have completed tape unloading.
arrow on the mechanism chassis. Then refer to Fig. 3-
17-3 and check that the S load gear and the T load gear
have completed tape unloading.
3. When assembling the parts, raise the right side of the
crescent slide
3
slightly, and keeping it in this position,
slot the left side into the clamp
4
, then align the hole
5
with the hole
6
in the mechanism chassis. When
you do this, check that the hole
7
is aligned with the
pin
8
on the BT spring lever assembly, and that the
hole
9
is aligned with the pin
0
on the S brake act
slide, before pressing the crescent slide
3
into place.
Check that the clamps
1
,
2
and
4
are engaged.
4. After assembly, check that each leverand each brake is
working properly.
!¡
Screw
7
Hole
0
Pin
8
Pin
D
9
Hole
3
Crescent slide
5
Hole
2
Clamp
A
6
Hole
4
Clamp
1
Clamp
!™
Crescent
mounting
Fig. 3-16-1
Grease the sides
Grease the teeth
Crescent
slide
slide
Apply grease to the areas shown in
• The places marked by dots should be greased
particularly generously.
• The places marked by dots should be greased
particularly generously.
Fig. 3-16-2
5-24
3-17. S LOAD GEAR, T LOAD GEAR,
S LOAD LEVER ASSEMBLY AND
T LOAD LEVER ASSEMBLY
(See Figs. 3-17-1. 3-17-2 and 3-17-3)
T LOAD LEVER ASSEMBLY
(See Figs. 3-17-1. 3-17-2 and 3-17-3)
1) Refer to section 3-16 and remove the crescent slide.
2) Refer to section 3-14-2 and remove the S and T incline
2) Refer to section 3-14-2 and remove the S and T incline
mounting assemblies.
3) Remove the clamp
1
, then remove the components:
the S load gear
2
, the S load spring
3
and the S load
lever assembly
4
. When you do this, be careful not to
damage the clamp
1
, which can be damaged easily.
Again, be careful when you disassemble the compo-
nents, as the S load spring
nents, as the S load spring
3
will spring out.
4) Remove the following components: the T load gear
5
,
the T load spring
6
, and the T load lever assembly
7
.
Be careful when you disassemble the components, as
the T load spring
the T load spring
6
will spring out.
ASSEMBLY NOTES:
1. Apply grease (VHJ-0100) to the shafts
8
,
9
and parts
A shown in Fig. 3-17-1. Then apply grease (VHJ-0100) to
the parts shown in Fig. 3-17-2.
the parts shown in Fig. 3-17-2.
2. When fitting the S load gear
2
and the T load gear
5
align them in the tape-loaded state, as shown in Fig. A in
Fig. 3-17-3. Again, after completing tape-unloading on
these gears, check that they are positioned as shown in
Fig. B in Fig. 3-17-3, then refer to section 3-14-2 and fit
the S and T incline mounting assemblies.
Fig. 3-17-3. Again, after completing tape-unloading on
these gears, check that they are positioned as shown in
Fig. B in Fig. 3-17-3, then refer to section 3-14-2 and fit
the S and T incline mounting assemblies.
4
S load lever
assembly
6
T load
spring
5
T load
gear
Parts A
(apply
grease here)
(apply
grease here)
3
S load spring
1
Clamp
8
Shaft
9
Shaft
2
S load
gear
7
T load lever
assembly
Fig. 3-17-1
Apply
grease here
grease here
Apply
grease
here
grease
here
Apply
grease here
grease here
Apply
grease here
grease here
Apply
grease inside
the hole
grease inside
the hole
Apply grease inside
the hole
the hole
Apply grease to the gears
(T side)
(S side)
Fig. 3-17-2
Fig. B: When tape unloading is complete
Fig. A: When tape loading is complete
T load gear
S load gear
T load gear
S load gear
Fig. 3-17-3
5-25
3-18.TAPE SENSORS, REEL SENSOR
AND EP SW LEVER
3-18-1 TAPE TOP SENSOR AND TAPE END
SENSOR (See Fig. 3-18-1)
1) Refer to section 3-2 and remove the mechanism unit.
2) Refer to section 3-3-1 and remove the cassette mecha-
2) Refer to section 3-3-1 and remove the cassette mecha-
nism assembly.
3) Remove the soldering from the MC-1 PWB assembly,
then remove the photo diodes
1
,
2
and the LED
3
.
When removing the photo diode
2
on the tape top
sensor side, refer to section 3-15 and remove the main
cam.
cam.
ASSEMBLY NOTES:
1. Fit the photo diodes
1
and
2
so that their photorecep-
tors to face the LED
3
, as shown in Fig. 3-18-1. Align
the cuts in the LED
3
and the holder
4
.
Push the photo diodes
1
,
2
and the LED
3
as far
down as they will go, so that they do not protrude above
the top of their holders.
the top of their holders.
2. Do the soldering quickly.
Turn the photoreceptors to
face the LED
face the LED
3
1
Photo
diode
(Tape end
sensor)
(Tape end
sensor)
3
LED
4
Holder
Holders
Front
Align the cuts
Holders
2
Photo
diode
(Tape top
sensor)
(Tape top
sensor)
Fig. 3-18-1
3-18-2. REEL SENSOR (See Fig. 3-18-2)
1) Refer to sections 3-12-2 and 3-12-4. then remove the
clutch mounting assembly, the T soft brake assembly
and the take up reel assembly.
and the take up reel assembly.
2) Refer to section 3-13-2, then remove the wheel gear 2,
the wheel gear 1. and the brake control lever.
3) Remove the soldering from the MC-1 PWB assembly,
then remove the photo diode (reel sensor)
1
.
ASSEMBLY NOTES:
1. When assembling the parts, align the cut on the photo
diode (reel sensor)
1
with the protrusion on the
mechanism chassis
2
.
2. Do the soldering quickly.
Cut
1
Photo diode
(reel sensor)
Mounting shaft for
take up reel
assembly
take up reel
assembly
2
Protrusion
Fig. 3-18-2
3-18-3. EP SWITCH LEVER (See Fig. 3-18-3)
1) Refer to section 3-3-1 and remove the cassette mecha-
nism assembly.
2) Remove the EP switch spring
1
.
3) Remove the clamp
2
, then remove the EP switch lever
3
.
ASSEMBLY NOTES:
1. Apply grease (VHJ-0100) to the protrusion
4
on the
back of the EP switch lever
3
.
2. After fitting the cassette mechanism assembly. check
that in EJECT mode. the EP switch lever
3
does not
touch the EP switch
5
.
1
EP switch spring
3
EP switch lever
2
Clamp
5
EP switch
4
Protrusion on
back
(apply grease here)
(apply grease here)
Fig. 3-18-3
Click on the first or last page to see other SLV-E420CP / SLV-E420VC / SLV-E520CP / SLV-E520UX / SLV-E520VC service manuals if exist.