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– 9 –

Perform steps 1 to 4 of the disassembly method to remove the
tape mechanism. (See page 8.)

1. Remove the screws (A1) x 2 pcs., to remove the record/

playback head.

2. Remove the hooks (A2) x 2 pcs., toward the center

position as shown in Fig. 9-1. and then extract the erase
head upward.

Note:
After replacing the heads and  performing the azimuth
adjustment, be sure to apply screwlock.

1. Remove the screw (B1) x 1 pc., and remove the pinch

roller upwards.

1. Remove the main belt (C1) x 1 pc.,  from the motor

pulley.

2. Remove the FF/REW belt (C2) x 1 pc., from the REW/FF

roller.

3. Put on the belts in the reverse order of removal.
Note:
When putting on the belt, ascertain that the belt is not twisted,
and clean it.

1. Remove the main belt. (See Fig. 9-3.)
2. Remove the screws (D1) x 2 pcs., to remove the motor

bracket.

3. Remove the screws (D2) x 2 pcs., to remove the motor.
Note:
When mounting the motor, pay attention to the motor bracket
angle.

(A1) x1
ø2x7mm

(A1) x1
ø2x3mm

Record/Playback
Head

Erase Head

Hook
(A2)x2

Pinch Roller

(B1) x1
ø1.5x2.5mm

Motor Bracket

Motor

Motor

(D2)x2
Special
Screw

(D1) x1
ø2.5x4mm

(D1) x1
ø2.5x4mm

Motor

REW/FF
Roller

Flywheel

FF/REW Belt
(C2)x1

Main Belt
(C1)x1

Motor Pulley

– 10 –

Perform steps 1 to  6 of the disassembly method to remove the
CD mechanism. (See page 8.)

1. Remove the screws (A1) x 2 pcs., to remove the shaft

(A2) x1 pc.

2. Remove the stop washer (A3) x1 pc., to remove the gear

(A4) x 1 pc.

3. Remove the pickup.

Stop 
Washer
(A3) x1

CD 
Mechanism

Gear
(A4) x1

Shaft
(A2) x1

Pickup

(A1) x2

ø2.6 x6mm

(E1) x 1
Stop Washer

Washer

Flywheel

1. Remove the belt. (See Fig. 9-3.)
2. Remove the stop washer (E1) x 1 pc., with a small

precision screwdriver to extract the flywheel from the
capstan metal.

Note:
When the stop washer is deformed or damaged, replace it
with a new one.

Install each part in the reverse order of the removal with care.

Note:
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector remove to protect the optical pickup
from electrostatic damage.

– 11 –

PLAY: TW-2412

Over 80 g

Play: TW-2111

30 to 60 g.cm

Fast Forward: TW-2231

55 to 140 g.cm

Rewind: TW-2231

55 to 140 g.cm

MTT-111 Variable

3,000 

±

 90 Hz

Output: Speaker

resistor in

Terminal

motor. (M601)

(CNP201 Load
resistance: 4 ohms)

Volume control

Max

Function switch

Tape/Power Off

MTT-118

1.1 V 

±

 3 dB

Speaker Terminal
(Load resistance: 4 ohms)

fL: Low-range frequency
fH: High-range frequency

FM Detection

T2

FM

fL: L2

Band Coverage

fH: TC2

FM Tracking

fL:    88.0 MHz: L1
fH: 108.0 MHz: TC1

Input: Pin 1 of IC1
Output: Pin 18 of IC1

Input: Antenna
Output: Speaker
Terminal (CNP201
Load resistance: 4
ohms)

AM IF

T3

Input: Antenna
Output: Pin 18 of IC1

AM

fL: L4

Input: Antenna

Band Coverage

fH: TC4

Output: Speaker

AM Tracking

fL:     600 kHz: L3

Terminal (CNP201

fH: 1,400 kHz: TC3

Load resistance: 4
ohms)

MTT-114

Output: Speaker Terminal
(CNP201 Load resistance: 4 ohms)

L301

80 kHz 

±

 6 kHz

Pin 1 of CNP101

M601

TAPE MOTOR

SW601
TAPE MAIN

TAPE MECHANISM

Variable resistor
in motor

VR201 

SW201 

CNP101

SW102 

L1

L4

L2

IC1

T3

IC101

BI803 

IC201 

CNP602

BI802 

BI801 

L301

T2

1

1

TC4

TC2

TC1

TC3

FM ROD ANTENNA

MAIN PWB

1

13

18

AM BAND
COVERAGE

fL

fH

AM IF

FM
DETECTION

12

24

BIAS OSC.

AM
TRACKING

fL

fH

L3

AM BAR 

ANTENNA

1

12

11

2

2

3

4

1 2 3

2

FM BAND
COVERAGE

L3

IC802

IC803

1

14

15

IC801

1

12

13

24

CNP201

28

fH

fL

FM
TRACKING

fH

fL

– 12 –

TP

1

5

10

12

13

15

20

24

7

10 20

8

21

22

1

5

8

1

5

25

28

1

1

6

E

C

B

1 2 3 4

C847

C844

C853

C846

C855

X801

C84

0

IC801

C820

C863

C829

R829

C819

R830

R806

R851

R852

C842

C839

C838

R824

R820

C841

C830

R805

C828

BI802 

C804

C816

R802

C801

R804

C815

C802

BI801 

Q801

C817

R801

C835

C834

R853

C807

IC802

R839

R862

R844

R846

C824

R861

CNP101

C843

R821

C825

R843

C823

R826

C827

R827

C826

C833

R828

FW806

6

4

C106

R106

SW102 

IC803

BI803 

C

805

6

1

5

10

15

20

25

30 31

35

40

45

50

51

55

60

65

70

75

80

81

85

90

95

100

A 

B 

C 

D 

H 

G 

F 

E 

SW102
RECORD/PLAYBACK 

PLAY

REC.

1

10

330 ohm

Resistor

GND

27pin

MAIN
PWB-A1

OPEN/CLOSE

SW810
CD LID

SWITCH

BR

BR

GY

GY

GY

GY

GY

W

H

Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not  necessary
to readjust it.
Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.

While holding down the "Stop" and "Up" button at same time, move the FUNCTION switch to "CD".

Start

Note

1. When the CD LID switch is in the OFF position, (CD LID is open) the unit will be able to enter the test mode.

However, can use the "UP/CUE" and  "DOWN/REVIEW" button only.

2. You can only move the pickup.
3. The LCD display should be the same as it is for normal CD operations.

Operation

The use of the "UP/CUE" button will move the pickup to the outermost position.
The use of the "DOWN/REVIEW" button will move the pickup to the innermost position.

After connecting of the 10 kohm resistor between IC802  27 pin and GND and holding down the "Stop" and "Up"
button at same time, move the FUNCTION switch to "CD".

Start

Display

1. Before the laser light up, CD LID switch (SW801) terminals have to be short with the solder.

Resistor of 330ohm is put from 27 pin of IC802, and you must connect it to GND of PWB. (Refer to PWB of Figure 12-1.)

1. Remove the front cabinet according to the disassembly method.
2. Short the TP of the Figure 12-1 to turn on the CD LID switch (SW810).
3. While holding down the "Stop" and "Up" button at same time, move the FUNCTION switch to "CD".
4. Open the CD LID and press the PLAY button. The laser lights up for a few seconds. (At this time, the pickup lens moves

up and down and adjusts the focus to check if there is a disc or not.)