Sony SVT-N72P, Service Manual

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SVT-N72P (E)
3-3. Cassette Drive Mechanism
3-3-1. Cassette Mechanism Assembly
1. Put the VCR into EJECT mode.
2. Remove the two screws
1
.
3. Lift up the back of the cassette mechanism assembly
2
slightly, and remove the two hooks
3
on the front.
Assembly Notes:
1. The cassette mechanism assembly and the mecha-nism
chassis should both be fitted in EJECT mode.
2. Check that the two hooks
3
have snapped into the
mechanism chassis, and make sure that the two holes
4
in the cassette mechanism assembly are aligned
with the two dowels
5
on the mechanism chassis.
3. Make sure that the big tooth on the pinion gear of the
cassette mechanism assembly slots properly into the
deepest gap in the start rack gear, as shown in Fig. 3-3-
2.
4. When fitting the two screws
1
, use the torque gauge
screwdriver (VHJ-0014). Give the screws a tightening
torque of 5 kg
.
cm.
Fig. 3-3-1
3-3-2. Cassette Drive Gear
1. Refer to Section 3-3-1 and remove the cassette mecha-
nism assembly.
2. Remove clamps
1
and
2
, then remove the gear
holder
3
.
3. Remove the clamp
1
, then remove the pinion gear
4
.
4. Remove the clamp
2
, then remove the lock gear
5
.
Assembly Notes:
1. Put the tray in the EJECT mode position before fitting
any parts.
2. Apply grease (VHJ-0100) to the gear mounting shafts,
all the gear teeth, and the cam part of the drive gear
6
.
3. Ensure that the drive gear, the lock gear and the pinion
gear interlock correctly, as shown in Fig. 3-3-2.
4. Make sure the clamps
1
and
2
snap in to the gear
holder
3
.
Fig. 3-3-3
1
Screw
3
Hook
3
Hook
1
Screw
5
Dowel
2
Cassette mechanism
assembly
4
Hole
4
Hole
Mechanism
chassis
Drive gear
Start rack gear
Lock gear
Pinion gear
Ensure correct
interlocking
Ensure correct
interlocking
Fig. 3-3-2
3
Gear holder
6
Drive gear
Tray
Apply
grease
4
Pinion gear
(grease the
outer rim of
the teeth)
5
Lock gear
(grease the outer rim
of the teeth)
1
Clamp
2
Clamp