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1) Remove the mechanism unit, referring to section 3-2.
2) Remove the cassette mechanism assembly, referring to

section 3-3-1.

3) Remove the special screw 

1

. When you dothis, slide

the front rack gear assembly 

2

 towards the front until it

stops, then take it off the shaft 

3

. Take care not to

damage the shaft 

3

.

4) Remove the spring 

4

.

5) Remove the clamp 

6

 on the front rack gear 

5

, then

remove the start rack gear 

7

.

1. Apply grease (VHJ-0100) to the front rack gear 

5

 and

all over the inside of the groove on the start rack gear

7

.

2. Align the positioning mark 

8

 on the front rack gear 

5

with the mark 

0

 on the main cam 

9

.

3. When installing the cassette mechanism assembly,

refer to section 3-3-1 and align the start rack gear with
the pinion gear.

6

 Clamp

1

 Special screw

4

 Spring

7

 Start rack gear

     (apply grease to
      inside of groove)

5

 Front rack gear

     (apply grease to
      inside of groove)

3

Shaft

2

 Front rack

     gear assembly

Fig.3-3-5

8

 Positioning mark

5

 Front rack

     gear

0

 Positioning mark

9

 Main cam

Flg.3-3-6

1) Remove the clamp 

1

 and take out the cleaner lever 

2

.

When you do this, be careful not to bend the plastic

springs 

A

 and 

B

 on the cleaner lever 

2

.

2) Remove the clamp 

3

, and take out the cleaner roller

assembly 

4

. Be careful not to touch the sponge on the

cleaner roller assembly 

4

.

1. When mounting the cleaner lever 

2

 on the shaft 

5

,

press the clamp 

1

 in the direction shown by the arrow,

and snap it into the mounting 

6

 on the audio R/P head

assembly.

4

 Cleaner roller assembly

3

 Clamp

2

 Cleaner lever

1

 Clamp

A

 Plastic spring

5

 Shaft

6

 Mounting

B

 Plastic spring

Fig.3-4-1

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

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

 

6

 Lower cylinder

     assembly
     (lower drum)

8

 Round hole

Screw holes

6

 Lower cylinder

     assembly
     (lower drum)

8

 Round hole

Fig. 3-5-4

1) Refer to section 3-2 and remove the mechanism unit.
2) Remove the screw 

1

 and remove the cylindere arth

assembly 

2

 .

3) Remove the two screws 

3

, the rotor 

4

 and the spacer

8

 .

4) Remove the three screws 

5

 and the stator 

6

.

1. When fitting the rotor 

4

, align the long hole 

9

 -beside

the triangular mark on the rotor 

4

 - with the hole 

0

 in

the rotor disk.

2. When fitting the screws 

3

 and 

5

, use the torque

gauge screwdriver (VHJ-0014). Give the screws a
tightening torque of 3 kg/cm.

3. Align the dowels 

!¡

 on the cylinder earth assembly 

2

with the holes 

!™

 in the chassis.

4. After fitting the mechanism unit, do the switching

position adjustment of the servo circuit.

3

 Screws

4

 Rotor

9

 Long hole (used for

     alignment when fitting
     the rotor)

Triangular mark

5

 Screws

6

 Stator

8

 Spacer

1

 Screws

2

 Cylinder

     earth
     assembly

!¡

 Dowels

!™

 Holes

0

 Hole (Use for alignment

     when fitting the rotor)

Fig. 3-5-5

1) Refer to sections 3-5-3, and remove the cylinder unit,

the rotor, and the stator.

2) Remove the three screws 

1

 and the cylinder assembly

2

.

1.Be careful not to scratch or soil the top of the cylinder.

After fitting the cyiinder, clean the surface.

2.Align the cylinder assembly 

2

 with the two dowels 

4

 on

the mechanism chassis 

3

.

3.After fitting the cylinder assembly, do the tape path

adjustment as instructed in section 4-3 and do the
switching position adjustment of the servo circuit.

2

 Cylinder

     assembly

4

 Dowels

1

 Screws

3

 Mechanism

     chassis

Fig.3-5-6

1) Unplug the connector from the audio R/P head assem-

bly (ACE head).

2) Remove the two screws 

1

 and the audio R/P head

assembly (ACE head) 

2

.

1. Align the hole 

3

 on the audio R/P head assembly

(ACE head) with the pin 

4

 on the chassis unit.

2. After assembly, check that the clamp 

5

 on the cleaner

roller assembly has snapped into the mounting of the
audio R/P head assembly (ACE head) 

2

.

3. After assembly, clean the surface of the head with a

soft cloth or chamois.

4. After assembly, refer to section 4-3, and adjust the

head height, the azimuth and the tracking (X) position.

       

1

 Screws

2

 Audio R/P head assembly

     (ACE head)

3

 Hole

5

Clamp

4

 Pin

Fig. 3-6-1

1) Unplug the connector from the full erase head 

1

.

2) Remove the screw 

2

 and the full erase head 

1

.

1. After assembly, clean the full erase head 

1

.

      

2

 Screw

1

 Full erase head

Fig. 3-6-2