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– 13 –

1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2)

x1pc.

2. Remove the stop washer (B3) x 1 pc., to remove the gear

(B4) x 1pc.

3. Remove the pickup.

Perform steps 1, 2, 3, 12, 13, 14 and 15 of the disassembly
method to remove the CD mechanism.

1. Remove the belt (A1) x 1 pc., from the motor side.
2. Bend the hooks (A2) x 5 pcs., to remove the loading motor.

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

(A2)x3

Loading Motor

Disc Tray

(A2)x2

Belt
(A1)x1

Loading 
Motor

PWB

(B1) x2
 ø2.6 x6mm

Shaft
(B2) x1

Stop Washer
(B3) x1

Gear
(B4) x1

CD Mechanism

Pickup

(F1) x2
Ø 2.6 x 5mm

Motor

TAPE2

1. Remove the belt.
2. Remove the screws (F1) x 2 pcs., to remove the motor.

– 14 –

•

Signal generator: 400 Hz, 30%, AM modulated

*1. Input: Antenna,

Output: TP302

*2. Input: Antenna,

Output: TP301

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

AM IF

450 kHz

1,620 kHz

T351

*1

AM Band

—

522 kHz

(fL): T306

*2

Coverage

1.1 

±

 0.1 V

AM Tracking 990 kHz

990 kHz

(fL): T303

*1

•

Notes:
1: Description of the "FM IF Adjustment" is not carried on this

Manual. It is because the IF coil in the FM front end section
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.

2: The parts in the FM front end section are prepared in a

complete unit, so you can't obtain each part individually

FE301

AM IF

T303

T306

AM

TRACKING fL

AM BAND

COVERAGE fL

T351

MAIN PWB

1

SO301

R381

TP302

R357

TP301

CNP301

•

Play: TW-2111

Tape 1: Over 80 g
Tape 2: Over 80 g

•

Play: TW-2111

30 to 80 g. cm

30 to 80 g.cm

Fast forward: TW-2231

—

70 to 180 g.cm

Rewind: TW-2231

—

70 to 180 g.cm

Normal

MTT-111

Variable

3,000 

±

Speaker

speed

Resistor in

30 Hz

terminal

motor.

(Load
resistance:
6 ohms)

•

TAPE MECHANISM

Variable Resistor 
in motor

Tape motor

– 15 –

Any one of test mode can be set by pressing several keys as
fallows.
 <X-BASS> + <CD> + <POWER> TEST:CD operation test

Function:-CD test mode.
               -Enter test mode.

C  D       T  E  S  T

OPEN/CLOSE operation is using manual.

<<

>>, <<

>> buttons make pick's slide possible.

Do TOC IL. Do normal play
When these following key is
input into PLAY key, track
number  can be appoint directly

<<PLAY>> key input.

<<MEMORY>> key input.

<<

1>> key: Track 4

<<

2>> key: Track 9

<<

3>> key: Track 15

<<STOP>> key input.

STOP

Laser ON.

<<MEMORY>> key input.

Tracking OFF play at that
specific point.

<<MEMORY>> key input.

Tracking ON play at that
specific point.

<<STOP>> key input.

STOP

VOL — Last memory
BAL — CENTER
P.GEQ — FLAT
X-BASS — OFF

To cancel : Power OFF

Sliding the PICKUP with
<<

>>, <<

>> button

must only be in STOP mode.

[Servo System Error]

0001

Cannot detect Pickup-in SW

0002

DSP access error

[Error during close operation]

0101

Open/Close SW Low 

→ 

High not functioning

0103

Open/Close SW High 

→

 Low not functioning

[Error during open operation]

0201

Open/Close SW Low 

→ 

High not functioning

0203

Open/Close SW High 

→

 Low not functioning

[Error during skip operation]

0302

Pickup-in SW is not detected

0306

During Disc 1 search, Open/Close SW or Clamp SW
or Disc SW do not change to low.

0307

Clamp SW Low 

→ 

High not functioning

0308

Clamp SW High 

→

 Low not functioning

Since this CD system incorporates the following automatic
adjustment functions, readjustment is not needed when
replacing the pickup. Therefore, different PWBs and pickups
can be combined freely.
Each time a disc is changed, these adjustments are
performed automatically. Therefore, playback of each disc
can be performed under optimum conditions.

(1) Offset adjustment (The offset voltage between the head

amplifier output and the VREF reference voltage is
compensated inside the IC.)

  * Focus offset adjustment
  * Tracking offset adjustment

(2) Tracking balance adjustment (waveform drawing 15-1

EFBL)

(3) Gain adjustment (The gain is compensated inside the IC

so that the loop gain at the gain crossover frequency will
be 0dB.)

  * Focus gain adjustment
  * Tracking gain adjustment

•

EFBL

FDO

TE

Stopped

IL isn't done

•

– 16 –

Yes

Yes

Comparing freg.
same or not?
Between current receiving
frequency and (already)
previously memorized
frequency.

Hold down the ASPM button for 3 more second.

No operate. 
After displayed “END”. 
Return to previous station.

“ASPM” blinks in the display.

Begin to scan start 87.50 

→

 108.00 MHz

Preset CH memory full over?

SD (TUNE) DET out OK?

Yes

No

No

No

No

No

If count 1st OK?

Yes

If count 2nd OK?

Yes

RDS signal or not?   PI—identify

Yes

Comparing PI cord
same or not?
between current receiving
PI and before PI which is
already memorized by
ASPM on this time.

Yes

Yes

No

Comparing freg.
same or not?
between current receiving
frequency and (already)
previouslymemorized
frequency.

No

Memorized to the
lowest vacant
preset channel.

No

Memorized to the
lowest vacant
preset channel.

Compare the field
strength of current receiving
signal.
Is receiving signal stronger than
signal which has same PI cord
and is already memorized to
preset memory ahead of this
receiving time?

No effect

No effect

No effect

Effect

Pass
No effect

Pass
No effect

Pass
No effect

Pass
No effect

Displayed the TTL quantity of memorized
stations by ASPM operation on this time.
And return to the previous
receiving freq. automatically. 

Begin to ASPM SCAN from the next
CH-SPAN again.

Repeat and continue with same format
ASPM operation untill 108 MHz.
After reached 108 MHz, displayed the TTL
quantity of memorized stations.
And return to the previous receiving freq.
automatically.

Preset CH memory become full over?

Yes

No