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– 6 –

Perform steps 1, 2, 3 and 5 of the disassembly method to
remove the CD mechanism.

1. Remove the screws (A1) x 2 pcs., to remove the shaft (A2)

x1 pcs.

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

(A4) x 1 pcs.

3. Remove the pickup.

Top Cabinet

Tape

Mechanism

CD Mechanism

(F1)x3
ø2.5x10mm

(C1)x1
ø2.5x8mm

(E1)x4
ø3x10mm

(C2)x1

(G1)x2
ø3x12mm

(G1)x1
ø3x10mm

(G1)x2
ø3x10mm

Terminal PWB

Driver

Push

(G2)x1

Rear Cabinet

(A1) x2
ø2.6 x6mm

Stop 
Washer
(A3) x1

CD 
Mechanism

Gear
(A4) x1

Shaft
(A2) x1

Pickup

Rear Cabinet

(H1)x1

(H1)x1

Battery PWB

Pull

Pull

– 7 –

PLAY: TW-2412

Over 120 g

Play: TW-2111

25 to 65 g.cm

Fast Forward: TW-2231

60 to 130 g.cm

Rewind: TW-2231

60 to 130 g.cm

MTT-111 Variable

3,000 

±

 90 Hz

Output: Speaker

Resistor in

Teaminal

motor(M601)

(CNP201 Load
resistance: 8 ohms)

Volume control

Max

Function switch

Tape/Power Off

X-BASS

On

Surround (162H ONLY)

On

MTT-118

1.8 V 

±

 3 dB

Speaker Terminal
(CNP201 Load resistance: 8 ohms)

MTT-114

Output: Speaker Terminal
(CNP201 Load resistance: 8 ohms)

L301

82 kHz 

±

 6 kHz

Pin 2 of CNP201

– 6 kHz

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

IF

450 kHz

1,620 kHz

T3

*1

 Band

—

522 kHz

(fL): L4

*3

Coverage

1.35 

±

 0.05 V

Tracking

600 kHz

600 kHz

(fL): L3

*2

1,400 kHz

1,400 kHz

(fH):TC1

•  FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated

Band

—

87.50 MHz

(fL): L2

*1

Coverage

2.0 

±

 0.1 V

RF

98.00 MHz

98.00MHz

L1

*2

(10~30 dB)

*1. Input: Antenna,

Output: TP1

*2. Input: Antenna,

Output: Speaker Terminal

•  Detection
Signal generator: 10.7 MHz, FM sweep generator

IF

10.7 MHz

98.00 MHz

T1 (Turn

Input: Pin 1 of

the core of

IC1

T1 fully

Output: TP2

counter-
clockwise.

*1. Input: Antenna,

Output: Pin19 of IC2

*2. Input: Antenna,

Output: Speaker Terminal

*3. Input: Input is not connected,

Output: TP1

•  AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated

VR1

76 kHz 

±

 200 Hz

Pin 13, pin 21 and
ground of IC2

Note:
After preparing the test circuit shown in Fig. 7-1, connect the
Pin 13, Pin 21 and ground of the IC2 with the test circuit, and
measure the value. At  this time, apply a standard unmodulated
signal input and adjust the VCO.

Pin 13 of IC2

Pin 21 of IC2

D

G

S

10 kohm

TO FREQUENCY
        COUNTER

FET : 2SK19 or 2SK54

1

1

VCO

VR1

IC2

T3

L4

L2

IC1

L1

FM IF

T1

TC1

AM TRACKING

L3

AM BAR

ANTENNA

FM ROD ANTENNA

FM BAND

COVERAGE

T2

AM IF

TP2

FM RF

FM DET.

TP1

13

17

19

21

R29

R7

AM BAND

COVERAGE

MAIN PWB

fL

fH

– 8 –

The types of test mode for this microcomputer and specific test mode turning-on procedure are as follows. Only the unit key is used.
The remote control key is not valid. The power must be turned on while two keys are held down.
(1) CD test mode function

The power is turned while the (PRESET 

 ) and STOP (TUNING 

 ) keys are held down.

(2) Tuner test mode function

The power is turned on while the (PRESET 

 ) and PAUSE (BAND) keys are held down.

(3) LCD test mode function

The power is turned on while the (PRESET 

 ) and MEMORY keys are held down.

When the CD test mode is turned on, the CD pickup is moved to the innermost periphery, and the following indication appears.
The operation of CD test mode is as follows.

Indication

(1) The CD pickup is moved with the unit UP key and DOWN key.

UP key: The pickup is slid to the outer periphery.
DOWN key: The pickup is slid to the inner periphery. However, when it reaches the innermost periphery, it does not move further
inward.

(2) When the PLAY key is pressed in stop state, "the laser diode turns on if CD lid is closed" .

Indication

(3) When the PLAY key is pressed in laser ON state, playback is started from the current position of pickup.

Indication

(4) When the STOP key is pressed during playback, the laser goes out and playback is stopped, and the process returns to step

(1). (The pickup position does not change.)

(5) When the MEMORY key is pressed during playback, tracking servo ON/OFF is performed. (Even if the playback is stopped

in servo OFF state, the servo is turned on when the playback is restored.)

Indication

The current pickup position and time are indicated. (When the
pickup is moved with the UP/DOWN key, the time at that point
is indicated.)

The current playback track No. and time are indicated.

The tuner test mode is intended to store the measurement frequency for adjustment and inspection in the preset memory CH
without frequency adjustment in the case of tuner adjustment in the production line.
When the power is turned on while the PRESET 

 (DOWN) key and BAND (PAUSE) key are held down together, the frequency

for adjustment measurement of destination (specified according to AREA terminal) is preset-stored in the preset memory CH. (The
frequency to be preset-stored for specific destination is as shown in the next page.)

Others

While the CD lid is open (LID-SW = "H"), the test mode is turned on but the operations of step (2) and subsequent steps are not
performed. The operation of step (1) is performed.

Contents of error display

Error display

Contents of an error

Er  01

Er  02

when TOC information cannot be read normally.

When a PU-IN SW detection error occurs.

– 9 –

In the tuner test mode the band is FM, and the mode is FM STEREO in case of start-up.

As with the ordinary mode, when the PRESET 

 key is pressed for 1ch of preset memory CH, maximum CH is set. When the

PRESET 

  key is pressed for maximum CH of preset memory CH, 1ch is set.

The BAND key is valid. As in the ordinary mode, the band/FM MONO/STEREO mode can be switched.

To exit from the tuner test mode, turn off the power to the microcomputer.

Indication

The indication is the same as that of ordinary operation. However,
when the test mode is turned on, the indication shown left lights
for one second.

Preset frequencies for various destinations (random preset memory)

BAND (CH)

U.S.A.

EUROPE

GENERAL 1

GENERAL 2

 1

FM 87.5M

FM 87.50M

FM 87.50M

FM 87.5M

 2

FM 108.0M

FM 108.00M

FM 108.00M

FM 108.0M

 3

FM 98.0M

FM 98.00M

FM 98.00M

FM 98.0M

 4

FM 90.0M

FM 90.00M

FM 90.00M

FM 90.0M

 5

FM 106.0M

FM 106.00M

FM 106.00M

FM 106.0M

 6

AM 530K

AM 522K

AM 531K

AM530K

 7

AM1720K

AM1620K

AM1602K

AM1620K

 8

AM 990K

AM 990K

AM 990K

AM 990K

 9

AM600K

AM 603K

AM 603K

AM 600K

10

AM 1400K

AM 1404K

AM 1404K

AM 1404K

11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

Note:
  The unit shown in table is Hz. K is x1000. M is x1,000,000.
  The slash indicates that data are not stored in the memory.
  FM is stereo mode.

When the LCD test mode is turned on, all the segments of LCD light.

Indication