Sony SLV-E120AE, Service Manual

Page: 26 / 69

5-11
3-5.CYLINDER (DRUM)
3-5-1. UPPER CYLINDER ASSEMBLY
(UPPER DRUM)
(See Figs. 3-5-1,3-5-2,3-5-3,3-5-4)
There are two types of cylinders, one that can be disas-
sembled into the upper cylinder (upper drum) and Iower
cylinder (lower drum) and one that cannot. For that type
that can not, replace the cyli nder assembl y as a whole.
1) Remove the two screws
1
(See Fig. 3-5-1).
2) First, tighten the handle
2
of the video head removing
tool (VHJ-0041), then screw the two long screws
3
evenly into the two screw holes
5
in the upper cylinder
assembly (upper drum)
4
(See Fig. 3-5-2 ).
3) Hold the tool (VHJ-0041) so that the upper cylinder
assembly (upper drum)
4
does not rotate, and at the
same time, turn the handle
2
clockwise, and remove
the upper cylinder assembly (upper drum)
4
.
4) Remove the tool (VHJ-0041) from the upper cylinder
assembly
4
.
1
Screws
Fig.3-5-1
Video head removing tool
(VHJ-0041)
2
Handle
3
Long
screws
5
Screw
holes
4
Upper cylinder assembly
(upper drum)
6
Lower cylinder assembly
(lower drum)
Fig.3-5-2
ASSEMBLY NOTES:
1. When carrying out assembly, the CH-1 head on the
upper cylinder assembly (upper drum)
4
and the lower
cylinder assembly (lower drum)
6
must be aligned. The
CH-1 head on the upper cylinder assembly
4
bears a
code
7
such as 2N2S-V, 2N4N, or 4H6N, as shown in
Fig. 3-5-3. The CH-1 on the lower cylinder assembly
6
has a round hole
8
, as shown in Fig. 3-5-4. Assemble
the parts so that the round hole
8
is next to the code
7
on the upper cylinder assembly.
2. Be careful not to scratch the tape path surface of the
cylinder. After replacing the cylinder, clean the tape
path surface of the cylinder.
3. After replacing the upper cylinder assembly, do the
tape path adjustment as instructed in section 4-3 and
do the swithching position adjustment of the servo
circuit.
4
Upper cylinder assembly
(upper drum)
7
Code
Fig. 3-5-3
[EXCEPT FOR 2-HEAD MONAURAL MODELS]
6
Lower cylinder
assembly
(lower drum)
8
Round hole
Screw holes
[2-HEAD MONAURAL MODELS ONLY]
6
Lower cylinder
assembly
(lower drum)
8
Round hole
Fig. 3-5-4