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The mechanism can be repaired without using the relay
cable (J-6090-057-A). As shown in Fig. 1-3-1, the relay
cable (J-6090-057-A) is a tool used for relay between the
CP-1 PWB assembly and mechanism unit.
When connecting it, take note of the pin number of the
connector.

Do not place the mechanism upright as shown

in Fig. 1-3-1 when inserting/ejecting the cassette.

For NTSC models, be sure to connect the VM-1

PWB assembly and CP-1 PWB assembly.

Mechanism unit

CP-1 PWB assembly

VM-1 (VP-1) PWB
assembly

Relay cable:
J-6090-057-A

Fig. 1-2-2

Fig. 2-1-1

Under frame

Stand L

Release lever

Lid opener spring

Pinion gear

Lock gear

Gear holder

Drive gear

Tray lock
spring

Door opener
lever

Capstan motor

Pinch roller lever assembly

Pinch lift cam

Pinch lift mounting

Front rack gear

Opener mounting

Pinch cam gear

Start rack gear

Load lever assembly

Tape top sensor

L guide act lever assembly

T soft brake assembly

Take-up reel assembly

T reel gear

Cylinder (Drum)

Cleaner lever

Cleaner roller assembly

Capstan brake assembly

Audio R/P head assembly
(ACE head)

T brake act slide

Clutch mounting assembly

S reel gear

S brake
assembly

T brake assembly

EP sw lever

EP switch

S soft lever

Supply reel assembly

Band brake assembly

BT spring

Tape sensor LED

BT lever assembly

Tape end sensor

Guide roller assembly

S incline mounting assembly

Full erase head

T incline mounting assembly

Guide roller assembly

Cylinder mounting

Fig. 2-1-2

Fig. 2-1-3

Stator

Rotor

T load gear

S load gear

Crescent mounting

T load lever assembly

S load lever assembly

BT spring lever assembly

MC-1 PWB assembly

Reel belt

Capstan motor

Loading motor assembly

Reel pulley

Friction gear assembly

S brake act slide

Wheel gear 2

Wheel gear 1

Worm gear assembly

Cylinder earth
assembly

Brake act lever
assembly

Harness mounting

Pinch cam gear

Mode switch (S8001)

Brake control lever

Main cam

Clutch change lever

Crescent slide

The letters and figures enclosed in circles in the mechanism mode column are the codes on the crescent slide.

FF/REW

EJECT

CASSETTE IN

IN REW

INITIAL

REVIEW

IDLER

STILL/SLOW

PLAY/STOP

BRAKE

Fig. 2-2-1

6

2

0

7

0

1

0

1

0

2

0

3

0

5

0

4

0

6

EJECT 

E 

Distinguished by whether the 
EP switch is ON or OFF.
Horizontal shift section. 
Vertical shift section. 

IN REW 

R 

INITIAL 

7

Cleaner roller assembly: ON 
S/T mounting incline assembly 
pressure begins.
S/T mounting incline assembly
pressure ends. 

REVIEW 

1 

IDLER pos. 

2 

(Pinch roller OFF) 

STILL/SLOW 

3 

PLAY/STOP 

5

BRAKE pos. 

4 

FF/REW 

6 

CASSETTE OUT

 (EJECT) 

IN REW

 (SHORT REW) 

INITIAL 

(POWER OFF)

The principal mode-switching states of the mechanism 

Mechanism mode 

HEX 

DATA

When loading is carried out starting at 
the CASSETTE IN position 

 REVIEW

STILL/SLOW 

REC PAUSE

REC

STOP

P LAY

CUE 

REW 

FF 

HEX

SW DATA

SW DATA 2

DATA

1

X

Y

Z

0

5.0V

H

H

H

5V

1

5.0V

H

H

L

0V

2

2.5V

H

L

H

5V

3

2.5V

H

L

L

0V

4

3.4V

L

H

H

5V

5

3.4V

L

H

L

0V

6

2.0V

L

L

H

5V

7

2.0V

L

L

L

0V

You can tell which mode the mechanism is currently in by
looking at the codes and marking-lines on the crescent
slide on the underside of the mechanism chassis. The
edge of the crescent mounting is used as the reference
line, as shown in Fig.2-2-2, and the marking-lines and
symbols indicating the mechanism modes are displayed
on the crescent slide, which slides against the edge of the
crescent mounting. The mechanism mode is read off from
the marking-line on the slide crescent which is aligned
with the reference-line on the crescent mounting.
Example: In Fig.2-2-2, marking-line 6 is aligned with the
reference-line on the crescent mounting , so the mecha-
nism is seen to be in FF/REW mode.

Some models are equipped with the SELF-DIAGNOSIS
DISPLAYS function.
Use it as a means of finding out the symptoms and cause
of the error before performing repairs.
For details, refer to the separate service manual for the
respective models.

6: FF/REW

4: BRAKE

5: PLAY/STOP

3: STILL/SLOW

2: IDLER

1: REVIEW

7: INITIAL
   (POWER OFF)

E: EJECT

Crescent slide

Crescent mounting

The edge of the
crescent mounting
is the reference-line

Fig. 2-2-2

(S): Strength    (W): Weakness 

T 

brake 

assembly 

OFF OFF  ON  ON  ON  OFF OFF OFF OFF  ON 

ON/OFF 

S 

brake 

assembly 

OFF  OFF OFF OFF  OFF OFF OFF  OFF  OFF  ON 

ON/OFF 

T soft brake assembly 

OFF 

OFF  OFF 

ON 

ON 

ON 

ON 

OFF 

OFF  OFF  OFF 

S 

soft 

lever 

ON  ON  ON  ON  ON  OFF OFF  OFF  OFF OFF OFF 

BT 

lever 

assembly 

OFF OFF 

OFF 

OFF OFF ON ON  ON  ON ON ON 

BT spring 

OFF 

OFF  OFF  OFF 

OFF 

ON(W) ON(W)  ON(S)  ON(S)  ON(S)  ON(W) 

Pinch roller lever assembly 

UP 

UP 

UP

 

UP/ DOWN/ 

ON OFF  ON  ON OFF OFF

 

DOWN

 UP 

Clutch mounting assembly 

PLAY  PLAY PLAY PLAY  PLAY PLAY PLAY  PLAY  PLAY PLAY  FF 

Load 

lever 

assembly 

UNLO 

UNLO 

UNLO 

LO  LO LO LO  LO  L  LO LO 

Capstan 

brake 

assembly 

OFF  OFF OFF OFF  OFF OFF OFF  ON  OFF OFF OFF 

S and T incline mounting assembly 

LO 

UNLO 

Cleaner 

roller 

assembly 

OFF OFF OFF (ON) (ON) OFF OFF OFF OFF OFF OFF

Principal parts

Mechanism mode

EJECT

IN REW

INITIAL

(POWER OFF)

(LOADING)

(UNLOADING)

REV

IDLER

STILL/SLOW

PLA

Y/STOP

BRAKE

FF/REW