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– 10 –

1. Remove the stop washer (B1) x 1 pc., to remove the gear

(B2) x 1 pc.

2. Remove the screws (B3) x 2 pcs., to remove the shaft

(B4) x 1 pc.

3. Remove the pickup.

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.

Perform steps 1, 2, 3, 10, 11, 12 and 13 of the disassembly
method to remove the CD mechanism.

1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.

•

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 

±

 30 Hz

Speaker

speed

Resistor in

Terminal

motor.

(Load
resistance:
6 ohms)

•

(B3)x2
 ø2.6x6mm

Shaft
(B4)x1

Stop Washer
(B1)x1

Gear
(B2)x1

CD Mechanism

Pickup

TAPE MECHANISM

Tape
Motor

Variable Resistor in motor

(A1)x5

Loading
Motor PWB

Loading
Motor

Loading
Tray

– 11 –

01

When Pickup set inner position, inner switch
cannot detect 'ON' level for 10 secs.

When tray moves to Open/Close, Open/Close switch

10*

cannot detect 'ON' level for 7 secs.
When disc table rotate to target position.
Clamp switch cannot detect 'ON' level for 7 secs.

When disc table set to Disc1 position for 1 st time,

11*

"CLAMP SW", "DISC NO SW" and "OPEN/CLOSE"
cannot detect 'ON' level for 14 secs.

31

When it changes to CD function, DSP cannot read
initial data.

EFBL

FDO

TE

Stopped

µ

(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

Fig.11-2 EFBL)

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

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

  * Focus gain adjustment
  * Tracking gain adjustment

•  Adjustment

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.

* 'CHECKING'
If Error is detected, 'CHECKING' will be display instead of 'ER-
CD**' display. 'ER-CD**' display will only be display when
error had been detected for the 5 th times.

• 

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

AM IF

TP301

TP302

R381

R357

T303

T306

L354

T351

CNP301
AM LOOP
ANTENNA

AM BAND
COVERAGE fL

AM TRACKING
fL

MAIN PWB

FE301

SO301
FM ANTENNA
TERMINAL

•  FM IF
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.

– 12 –

•

 Setting the test mode

 Any one of test mode can be set by pressing several keys as follows.
 <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 from
that specific point.

<<STOP>> key input.

STOP

IL isn't done

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.

<<MEMORY>>
key input.

Adjustment result
automatically will
display as below.
for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"

explanation:
a) Focus off set

= "FOFF_XX"

b) Tracking off set

= "TOFF_XX"

c) Tracking balance

= "TBAL_XX"

d) Tracking Gain

= "TGAN_XX"

f)

Focus Gain

= "FGAN_XX"

g) RF level shift

= "RFLS_XX"

Adjustment result automatically will
display as below for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"

<<MEMORY>> key input.

– 13 –

                     Error Contents

TAPE

Mechanism Error.

'ER-TA**'

00: Tape Mechanism Error.

01: Initial Error.

02:

03:

CD

Pickup Mechanism Error.

'ER-CD**'

01: PU-IN SW Detection NG.

02:

03:

04:

CD Changer Mechanism Error.

'ER-CD**'

10: Changer Error.

 (*)

11: Initial Error.

12:

13:

CD DSP Communication Error

'ER-CD**'

31: DSP COMMUNICATION ERROR

Focus Not Match.

'NO DISC'

IL Time Over.

'NOT READ'

TUN

PLL Unlock.

'ER-TU**'

00: TUN Error.

01: PLL Unlock.

02:

03:

(*) CHECKING:
If CD changer mechanism error is detected, 'CHECKING' will be display instead of 'ER-CD**' display 'ER-CD**' will only be display
when CD changer mechanism error had been detected for the 5 th times.

Speaker abnormal detection and +B PROTECTION display
In case speaker abnormal detection or +B PROTECTION had occured, it can be check by pressing 'POWER', 'VIDEO' and 'X-
BASS' key twice. Display will show "S** B**". S is referring to speaker abnormal detection and B is referring to +B PROTECTION.
** is in hex valve.

+B PROTECTION is condition when irregular process occur on power supply line.