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

When you do this, make sure the mechanism is in
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.

1. Apply grease (SGL-505) 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.

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

Apply grease to the areas shown in
• The places marked by dots should be greased
  particularly generously.

 Fig. 3-16-2

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

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 

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 

6

 will spring out.

1. Apply grease (SGL-505) to the shafts 

8

, 

9

 and parts A

shown in Fig. 3-17-1. Then apply grease (SGL-505) to
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.

4

 S load lever

     assembly

6

 T load 

     spring

5

 T load 

     gear

Parts A
(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

Apply
grease 
here

Apply
grease here

Apply
grease here

Apply
grease inside
the hole

Apply grease inside 
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

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

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.

2. Do the soldering quickly.

Turn the photoreceptors to
face the LED 

3

1

 Photo

     diode
    (Tape end
     sensor)

3

 LED

4

 Holder

Holders

Front

Align the cuts

Holders

2

 Photo

     diode
    (Tape top
     sensor)

 Fig. 3-18-1

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.

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

.

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

2

 Protrusion

Fig. 3-18-2

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

.

1. Apply grease (SGL-505) 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)

 Fig. 3-18-3

1) With the power switch turned OFF, stick black vinyl tape

over the photo diodes of the tape sensors. Then turn
the power switch ON. Front loading will begin. Refer to
section 3-2 and Fig. 3-2-2. and release the locks of the
tray lock lever and the lid opener lever.

1. The measurements must be taken without any incan-
descent light or daylight.
2. If the mechanism cannot be put into PLAY, FF or REW
mode by the method described in 1) above, make a
dummy cassette tape, as shown in Fig. 4-1-2. The dummy
cassette tape is made as follows: Unscrew the five screws
on the underside, remove the reels, leaf springs and other
parts on the supply and take up sides, make holes in the
upper surface as wide as the reel diameter, then assemble
the parts.
2) Put the mechanism into REW mode, wait at least 10 sec-

onds, then measure the torque value of the reel table on
the supply side. It should be at least 600 g/cm. Take the
measurement with the torque dial gauge (H-7099-039-H/
H-7099-035-H) held in position in your hand (lock torque).
While taking the measurement, rotate the reel table (take
up reel assembly) on the take up side with your hand so
that the reel sensor does not respond.

3) After switching to FF mode, wait for at least 10 seconds

and then measure the torque value of the reel table on
the take up side. It should be at least 600g/cm (lock
torque).

4) After switching to PLAY mode, wait for at least 10

seconds and then measure the torque value of the reel
table on the take up side. It should be between 80 and
140g/cm (lock torque).

Torque dial gauge
(H-7099-039-H)
(H-7099-035-H)

Reel table on
supply side

Reel table on
take up side

Fig. 4-1-1

Stick black vinyl
tape over the tape
sensor holes.

Dummy cassette
tape

Make holes with
roughly the same
diameter as the reel.

Fig. 4-1-2

1) Without loading a cassette tape, put the mechanism into

PLAY mode (turn the power switch OFF).

2) Adjust point 

A

 on the band brake assembly by rotating

it so that the tip of the BT lever assembly is aligned with
the line on the left side of the mechanism chassis.

3) Refer to section 4-2-2 and check that the back tension

torque is between 30 and 50g/cm.

Align the end of the BT lever
assembly with this line.

BT lever assembly

Tension
pole

Point 

A

Fig. 4-2-1

1) Mount the cassette torque meter (VHT-063S) and

switch to PLAY mode.

2) Check that the back tension torque is between 30 and

50g/cm .