SHARP MDMT180S Service Manual

MD-MT180

SERVICE MANUAL

No. S4224MDMT180S

PORTABLE MINIDISC RECORDER

MODEL MD-MT180(S)

• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.

CONTENTS

Page

SPECIFICATIONS ................................................................................................................................................................. 2

NAMES OF PARTS ............................................................................................................................................................... 3

OPERATION MANUAL .......................................................................................................................................................... 4

DISASSEMBLY...................................................................................................................................................................... 9

REMOVING AND REINSTALLING THE MAIN PARTS....................................................................................................... 10

ADJUSTMENT ...................................................................................................................................................................... 12

MD ERROR MESSAGE DISPLAY CONTENT LIST ........................................................................................................... 25

NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 26

TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 26

BLOCK DIAGRAM ............................................................................................................................................................... 27

SCHEMATIC DIAGRAM ...................................................................................................................................................... 28

WIRING SIDE OF P.W.BOARD........................................................................................................................................... 32

VOLTAGE ............................................................................................................................................................................ 43

WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 44

TROUBLESHOOTING ......................................................................................................................................................... 45

FUNCTION TABLE OF IC.................................................................................................................................................... 48

PARTS GUIDE/EXPLODED VIEW
PACKING METHOD

SHARP CORPORATION

This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

MD-MT180

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO
THE OPERATION MANUAL.

SPECIFICATIONS

Power sourc e:

Power consumption:
Output power:

Charging time:
Dimensions:

Weight:
Input jack:
Output jack:
Type:
Signal readout:
Audio channels:
Frequency response:
Rotation speed:
Error correction:
Coding:
Recording method:
Sampling frequency:
Wow and flutter:

Battery life:

When using the rechargeable
battery (fully charged) included
with the unit

When using one, commercially
available, high capacity, "AA"
size (LR6), alkaline batt ery (The
rechargeable battery is in the
unit, discharged.)

When using one, commercially
available, high capacity, "AA"
size (LR6), alkal ine batter y with
the rechargeable battery (fully
charged)

DC 1.2 V: Rechargeable Nickel-Metal Hydride battery (AD-N55BT) x 1
DC 5 V: AC adaptor (AC 120 V, 60 Hz)
DC 1.5 V: Battery case (Commercially available, "AA" size (LR6), alkaline battery x 1)
DC 4.5 V: Optional car adapt or, AD-CA20 X (for cars with a 12 - 24 V DC negative ground

7 W (AC adaptor)
RMS: 20 mW (10 mW + 10 mW)
(0.2 % T.H.D.)
Approx. 3.5 hours (90 %)
Approx. 5.5 hours (fu lly charged) (When using the AC adaptor included with the unit)
Width: 3" (76 mm) Height: 29/32" (22.9 mm) Depth: 3-9/32" (83 mm)

0.33 lbs. (148 g) with rechargeable battery
Line/optical digital
Earphones (impedance: 32 ohms)
Portable MiniDisc recorder
Non-contact, 3-beam semiconductor laser pickup
Stereo 2 channels/mon aural 1 channel
20 - 20,000 Hz ( 3 dB)
Approx. 400 - 1,350 rpm
ACIRC (Advanced Cross Interleav e Reed-Solomon Code)
ATRAC/ATRAC3 (Adaptive T R ansform Acoustic Codin g), 24-bit computed type
Magnetic modulation overwrite method

44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz, and then recorded.)
Unmeasurable (less tha n 0.001 % W. peak)

Continuous
recording:
Approx. 7
hours

Continuous
recording:
Approx. 6
hours

Continuous
recording:
Approx. 15.5
hours

electrical system)

Stereo 2 times long 4 times long

Continuous
play: Approx.
11 hours

Continuous
play: Approx.

15.5 hours

Continuous
play: Approx.
27 hours

Continuous
recording:
Approx. 9.5
hours

Continuous
recording:
Approx. 9.5
hours

Continuous
recording:
Approx. 23
hours

Continuous
play: Approx.
13 hours

Continuous
play: Approx.
19 hours

Continuous
play: Approx.
32 hours

Continuous
recording:
Approx. 12.5
hours

Continuous
recording:
Approx. 13
hours

Continuous
recording:
Approx. 30
hours

Continuous
play: Approx.
15 hours

Continuous
play: Approx.
22 hours

Continuous
play: Approx.
38 hours

Input sensitivity:

Reference input
level

LINE 100 mV 20 kohms

Output level:

Specified
output

Earphones - 10 mW +

LINE 250 mV

(-12 dB)

Specifications for this model are subject to change without prior
notice

Maximum
output level

10 mW

- 10 k ohms

Input impedance

Load
impedance

32 ohms

– 2 –

●

The continuous recording time is for analog inputs
when the volume lev el is set to "VOL 0".

●

The continuous play time shows the value when the
volume level is set to "VOL 15".

●

The above values are the standard values when the
unit is charged and used at an ambient temperature of
77°F (25°C).

●

The operating time when using an alkaline battery
may be different, depending on the type and manufac­turer of the battery, and on the operating temperature.

10

MD-MT180

NAMES OF P ARTS

1.Battery Case Connection Terminals

2.5 V DC Input Jack

3.Optical/Line Input Jack

1

8

7

6

5

2

3

4

9

11

13

12

15

16

17

14
18

19
20

25
26
27

28

21

22

23

24

4.Earphones/Line Output Jack

5.Recor d/Track Mark Button

6.Menu/Charge Button

7.Bass/Delete Button

8.Enter/Fast Play/Synchro Button

9.Volume/Cursor/Fast Forward/Fast Reverse /
Recording Level/

10.Open Lever

11.Stop/Power Off/Hold Button

12.Rechargeable Battery Cover

13.Play/Pause Button

14.Level Meter

15.Stereo Recor ding Indicator

16.Long-play/Recording Mode Indicator

17.Repeat Indicator

18.Monaural Mode Indicator

19.Record Indicator

20.Disc Mode Indicator

21. Synchro Reco rdin g In dicator

22.Total T rack Number Indicator

23.Disc Name Indicator

24.TOC Indicator

25.Battery Indicator

26.Random Indicator

27.Track Number Indicator

28.Character/Time Information Indicator

Name Select Button

– 3 –

MD-MT180

OPERATION MANUAL

Using with the Rechargeab le Battery

Charging the rechargeable battery

■

Do not force the
battery cover
open too far.

AC 120V,
60Hz

Insert the
– side first.

When the rechargeable battery is used for the first time
or when you want to use it after a long period of disuse,
be sure to charge it fully.

1

Insert the rechargeable battery.

A rechargeable battery other than the AD-N55BT

cannot be charged.

2

Plug the AC adaptor into the AC outlet, and
then insert the plug on the other end into

the DC IN 5V jack.

3

Press the MENU/CHRG button.

The battery indicator will scroll, and battery will be-

gin charging.

●

To the DC IN
5V jack

After the rechargeable battery is charged or used, it
will get slightly warm. This is normal.

●

When the portable MD is turned on or operating, the
battery will not be charged.

Using with the Alkaline Battery

Use one commercially available alkaline battery (LR6,
"AA" size).

Open

2

Press

1

Back of the
portable MD

When using the alkaline battery, be sure to insert the
rechargeable battery also.

1

Open the case cover.

2

Insert an alkaline battery into the battery
case.

3

Attach the battery case to the portable MD.

Caution:

●

While you are using the rechargeable battery and the
alkaline battery at the same time, do not remove either
of them. If you do, when the unit is in the play mode,
playback will stop. When in the recording mode, the
recorded contents will be erased, and the power may
be disconnected.
Do not replace the battery or the rechargeable battery

●

during operation.

Do not use a rechargeable battery (nickel-cad-

●

mium battery etc.) in the battery case.

●

If the unit is not used for a long period of time, remove
the battery. (Even if the power is turned off, the battery
will be drained slowly but continuously.)

Scrolling

RELEASE LOCK

– 4 –

Error Messages

MD-MT180

ERROR MES-

SAGES
BATT ENPTY
BLANK MD

Can't COPY

Can't EDIT

Can't PLAY

Can't READ (*)

Can't REC

MEANING

The battery has run down.

●

Nothing is recorded.

●

(Replace the disc with a recorded disc.)

You tried to record from a copy pr ohib-

●

ited MiniDisc.

(Record using the analog cable.)

●

You tried to record signals other than
music (such as data).

●

A track cannot be edite d.

(Change the stop posit ion of the track and
then edit it.)

●

You tried to play back a tra ck that can ­not be played with this equipment.

●

The disc data cannot be read because
the disc is damaged.

(Reload the Minidisc or rep lac e i t with an ­other one.)

Recording cannot be performed cor-

●

rectly due to vibration or shock.

ERROR MES-

SAGES

Can'tSTAMP

Can'tWRITE

DEFECT!

DISC FULL
Er-MD (**)

HOLD
LOCKED

NO DISC

●

Stamp function does not work.

(Check the nu m b e r of tracks.)

Cannot save the TOC information cor-

●

rectly to a MiniDisc.

●

The disc is scratched.

(If the recorded sound is not right, retry
recording or replace the disc with a re­cordable one.)

The disc is out of recording space.

●

●

The microprocessor has reported a
system fault and the unit is out of or­der.

(To have it repaired, go to the distributor
where you purchased the un it.)

●

The unit is in the hold mode.

●

You removed a MiniDisc whe n re cord­ing or editing.

(Turn off the power before removing the
MiniDisc.)

●

A disc has not been loaded.

MEANING

Number or symbol appears in (*) position.

ERROR MES-

SAGES

NO SIGNAL

PLAY MD

PROTECTED

SORRY

MEANING

Poor connection of the digital cable.

●

No output signal comes out from the

●

connected unit to playback.

(Use the AC power for the connected
unit.)

The input signal has improper sam-

●

pling frequency.

●

You tried to rec ord on a p layback -only
disc.

●

The write protection tab of a MiniDisc
is set to the protected position.

●

You tried to rec ord on a p layback -only
disc.

Since a track number is currently be-

●

ing located or updated, the unit cannot
accept your command.

(Wait for a while and try the operation
again.)

ERROR MES-

SAGES

TEMP OVER

TOC FORM
(**)

TOC FULL

Tr. Protect

? DISC

●

The temperature is too high .

(Turn off the power, and wait for a while .)

●

There is an error in the recording sig­nal.

(Erase all of the tracks, and then record
again.)

There is no space left for recording

●

character information (track names,
disc names, etc.).

●

The track has be en prote cted f rom be­ing erased.

(Edit the track with the dev ice on wh ich it
was recorded.)

A disc which contains data other than

●

music was played.

(A disc which contains nonmusic data
cannot be played.)

There is an error in the sign al recorded

●

on the disc.

MEANING

Number or symbol appears in (*) position.

– 5 –

MD-MT180

MiniDisc System Limitations

The unit may have the following symptoms when recording or editing. The unit is not out of order.

SYMPTOM LIMITATIONS

"DISC FULL" or "TOC FULL" appears
even though the MiniDisc still has re­cording time left.

The remaining recording time does not
increase even though you erased
tracks.

The total of the recorded time and the
remaining time does not match the max­imum recordable time.

Combine function does not work.

Sound skips in fast reverse/forward.

A track number is created in the middle
of a track.

More than 255 tracks (maximum) cannot be recorded regardless of
the recording time. If the MiniDisc is recorded or edited repeatedly or
if it has scratches (recording skips scratched parts), you may not be
able to record the maximum tracks above.

The unit does not count non-recorded portions that last 12 or fewer
seconds to display the remaining recording time. The time may not
increase even if you erase short tracks.

One cluster (approximately 2 seconds) is the minimum unit for re­cording. For example, a 3-second track uses 2 clusters (approxi­mately 4 seconds). Therefore, the actual recordable time may be
shorter than the displayed time.

(The number of seconds indicates that in the stereo recording mode
(SP). It varies depending on the recording mode.)

A MiniDisc on which recording and editing are repeated may not al­low the combine function.

If one track is divided and recorded in separate places on a repeat­edly recorded or edited MiniDisc, sound may skip.

A track number may be created if there are scratches or dust on the
MiniDisc.

Troubleshooting

Many potential "problems " can be resolved by the owner wit hout calling a service techn ician. If so mething seems to be wrong
with this product, check the following before calling your authorized SHARP dealer or service center.

The unit does not turn on.

●

Is the AC adaptor disconnected?

●

Is the battery exhausted?

●

Is the unit in the hold mode?
Has condensation formed inside the unit?

●

Is the unit being influenced by mechanical shock or b y

●

static electricity?

No sound is heard from the earphones.

●

Is the volume set too low?
Is the earphones plugged in?

●

●

Are you trying to pl ay a MiniDisc with data on it instead
of a MiniDisc containing music?

When the operation buttons are pressed, the unit does
not respond.

Is the unit in the hold mode?

●

Is the battery exhausted?

●

Is the earphones plug inserted firmly?

●

Some sounds are skipped.

●

Is the battery exhausted?

●

Is the unit being subjected to excessive vibration?

The MiniDisc cannot be ejected.

Has the track number or character information been

●

written on the disc yet?
Is the unit in the recording or editing mode?

●

Recording and editing are impossible.

Is the MiniDisc protected against accidental erasure?

●

●

Is the unit connect ed prope rly to the other equipment?
Is the AC adaptor unplug ged or did a power f ailure oc-

●

cur when recording or editing?

●

Is the unit in the hold mode?
Is an optical signal being output from the stereo sys-

●

tem? Read the operation manual for the stereo sys­tem.

– 6 –

1

2

Inserting a MiniDisc

Inserción de un minidisco

1

Slide the OPEN lever to re­lease the compartment door.

Deslice la palanca OPEN para
abrir la puerta del comparti­miento.

2

Lift it up.

Levántela.

3

Insert a MiniDisc as shown.

Inserte un minidisco como se
muestra.

4

Close the compartment door.

Cierre la puerta del compar­timiento.

When you record on a MiniDisc,
check that the erase prevention tab
is set to the “Recordable” position.

Cuando grabe en un MD, compruebe
que la lengüeta de prevención con­tra borrado esté puesta en la posición
"Grabable".

Recordable

Grabable

Recording
prevented

Grabación
prevenida

3

1

2

44

3

Insert according to the direction of the arrow.

Insértelo de acuerdo con la dirección de la flecha.

Preparation for use

Preparación para su utilización

The unit does not work if the unit is in the hold mode.

El aparato no funciona si está en el modo de retención.

Hold

Retención

Release

Liberación

Press the HOLD button for 2 seconds or more.

Pulse el botón

HOLD

durante 2 o más segundos.

CAUTION:

It is not recommendable to put the MiniDisc into a rear
pocket, as this may damage the product when sitting.

PRECAUCIÓN:

No es recomendable poner el MD en un bolsillo trasero,
porque esto podría dañar el producto al sentarse.

Connect the AC adaptor

Conecte el adaptador de CA

AC 120V, 60 Hz

120V CA, 60Hz

1

To an AC outlet

A un tomacorriente
de CA

1

Plug the AC adaptor into the
AC outlet.

Enchufe el adaptador de CA en
el tomacorriente de CA

Before using the unit with a rechargeable battery, the battery has to be charged.

Antes de emplear el aparato con una batería recargable, se deberá cargar la
batería.

To the DC IN 5V jack

A la toma DC IN 5V

.

2

Insert the plugs firmly.

Inserte firmemente las clavijas.

2

Insert the plug on the other
end into the DC IN 5V jack.

Inserte la clavija del otro
extremo en la toma DC IN 5V.

MD-MT180

3

Connections /

Conexiones

LINE OUT

To the DC IN 5V jack

A la toma DC IN 5V

White: To Left

To a stereo system with
jacks.

Note:

LEFTRIGHT

If the audio system has only one pair of jacks then they are usually
for input only and recording via this connection is not possible.

Para un sistema estéreo con tomas "LINE OUT" o
"AUDIO OUT"

Nota:

Si el sistema de audio tiene sólo un par de tomas, son
usualmente sólo para entrada y no puede realizarse la grabación
mediante esta conexión.

Blanco: A la izquierda

.

“LINE OUT” or “AUDIO OUT”

Red: To Right

Rojo: A la derecha

LINE IN

– 7 –

MD-MT180

Recording /

Check that the unit is connected to the stereo system.

Compruebe que el aparato esté conectado al sistema estéreo.

1

Press the REC button.

Pulse el botón REC.

2

Begin playback on the stereo system connected to this portable MD.

Inicie la reproducción en el sistema estéreo conectado a este MD portátil.

3

Press the REC LEVEL

Adjust the recording level so that the maximum sound volume from the source makes
the reading swing somewhere between –4 dB and 0 dB.

Pulse el botón REC LEVEL

Ajuste el nivel de grabación de modo que el nivel máximo de volumen del sonido de la
fuente haga que la indicación oscile entre –4 dB y 0 dB.

This unit can adjust the digital recording level just the same as the analog recording.

Este aparato puede ajustar el nivel de grabación digital del mismo mode que en el caso
de la grabación analógica.

4

Press the PA USE b utton on the stereo system to enter the playback pause mode.

Here you can search for the track to record.

Pulse el botón PAUSE del sistema estéreo para establecer el modo de pausa de

reproducción.

Aquí podrá buscar la pista a grabarse.

Level meter indicator

Indicador del medidor de nivel

Grabación

55

5 or

55

55

5

o

55

44

4 button

44

44

4

44

to adjust the recording level.

para ajustar el nivel de grabación.

5 Press the MENU/CHRG button repeatedly to select the "REC MODE".

Pulse repetidamente el botón MENU/CHRG para seleccionar "REC MODE".

6 Press the ENTER/SYNC button.

Pulse el botón ENTER/SYNC.

7 Press the MENU/CHRG button repeatedly to select recording mode.

Pulse repetidamente el botón MENU/CHRG para seleccionar el mode de grabación.

8 Press the ENTER/SYNC button.

The mode will be set automatically after 7 seconds even if the ENTER/SYNC
button is not pressed.

Pulse el botón ENTER/SYNC.

El mode se establecerá automáticamente después de 7 segundos aunque no se pulse el
botón ENTER/SYNC.

9 Press the

Pulse el botón

10

Begin playback on the stereo system, and the output will be recor ded.

Inicie la reproducción en el sistema estéreo, y se grabará la salida.

To stop recording

Press the :OFF/HOLD button.

When “TOC” appears, the MiniDisc
recorded contents have not yet been
updated.

Para detener la grabación

Pulse el botón :OFF/HOLD.

Mientras aparece “TOC”, aún no se habrá
actualizado el contenido grabado en el MD.

0606

06 button to start the MiniDisc unit recording.

0606

0606

06

para iniciar la grabación del aparato de MD.

0606

To update the recor ded contents

■

■

TOC display

Visualización
TOC

of the MiniDisc

Press the :OFF/HOLD button when
in the stop mode.

The power turns off after recorded
contents have been updated on the
MiniDisc.

Para actualizar el contenido
grabado del MD

Pulse el botón :OFF/HOLD mientras
esté en el modo de parada.

La alimentación se desconectará
después de haber actualizado el
contenido grabado en el MD.

■

■

Playback /

Right
channel

Canal
derecho

1 Insert the earphones plug into the PHONES jack.

Inserte la clavija de los auriculares en la toma PHONES.

2 Insert a MiniDisc.

Inserte un MD.

3 Press the

Playback starts automatically with a playback only MiniDisc or a MiniDisc
which is protected against accidental erasure (Auto-play function).

Pulse el botón

La reproducción empezará automáticamente con un MD de sólo reproducción o un
MD que está protegido contra borrado accidental (Función de reproducción
automática).

To stop playback

Press the :OFF/HOLD button.

If the unit is not operated for at least 2
minutes when in the stop mode, the
power will shut off automatically.

■

Left
channel

Canal
izquierdo

06 06

06 button.

06 06

Reproducción

To the PHONES jack

A la toma PHONES

0606

06

.

0606

Para detener la reproducción

Pulse el botón :OFF/HOLD.

Si el aparato no se utiliza durante un
mínimo de 2 minutos en el modo de
parada, la alimentación se desconectará
automáticamente.

■

– 8 –

DISASSEMBLY

Cares before disassembling

When assembling the machine after disassembling or
repair, observe the following requirements so as to ensure
safety and performance.

1. Remove the batteries from the machine, and take out the
mini-disc.

2. When assembling after repair, be sure to position the
wires in the same location.
Use the specified screws to fix the cabinet and the
mechanism unit. The use of the screws with length other
than specified may cause contact with the mechanism
unit resulting in malfunction.

3. When repairing, pay close attention so not to damage the
IC from static electricity.

STEP

REMOVAL

1 Bottom Cabinet 1. Screw ..................... (A1) x5 9-1

2 Top Cabinet 1. Open the Top cabinet. 9-1

3 Main PWB 1. Screw .................... (C1) x3 9-2

4 Mechanism Unit 1. Screw .................... (D1) x2 9-3

PROCEDURE

2. Open the Battery Door.

3. Hook .......................(A2) x1

2. Screw .....................(B1) x2 9-2

3. Flexible PWB..........(B2) x2

2. Flexible PWB......... (C2) x2

3. Hook ...................... (C3) x3

(D1) x1
ø1.4 x1.5mm

Mechanism Unit

Bracket

FIGURE

(D1) x1
ø1.4 x1.5mm

Top Cabinet

(A1) x2
ø1.4 x4mm

Main PWB

Hook
(C3) x3

Top Cabinet

(A1) x1
ø1.4 x2.5mm

Open Lever

(A1) x1
ø1.4 x4mm

(C1) x1
ø1.4 x2.5mm

*(C2) x1

Hook

1

(A2) x1

Figure 9-1

(C1) x1
ø1.4 x2mm

Pull

EJECT SWITCH

Be careful not to break the EJECT
SWITCH when remove and attach
the bottom cabinet.

Battery Terminal

2

Pull

Pull

Pull

Pull

MD-MT180

(A1) x1
ø1.4 x2.5mm

Bottom Cabinet

Battery Door

(B2) x2

(C2) x1

(C1) x1
ø1.4 x2.5mm

(B1) x2
ø1.4 x2.5mm

Figure 9-3

Caution:

Carefully handle the main PWB and flexible PWB. After removing the
flexible PWB (*) for the optical pickup from the connector, do not touch
directly the front end of flexible PWB with your hand so as to prevent
damage of optical pickup by static electricity.

Figure 9-2

– 9 –

MD-MT180

REMOVING AND REINSTALLING THE MAIN PARTS

Remove the mechanism according to the disassembling meth­ods 1 to 4. (See Page 9.)

How to remove the magnetic head (See Fig. 10-1.)

1. Remove the solder joints (A1) x 2 of the head flexible plate.

2. Remove the screws (A2) x 2 pcs. of the magnetic head.

Note:

Mount carefully so as not to damage the magnetic head.

How to remove the spindle motor (See Fig. 10-2.)

1. Remove the solder joints (B1) x 4 of flexible PWB.

2. Remove the screws (B2) x 3 pcs., and remove the spindle
motor.

MD Mechanism

(A2) x2
ø1.4 x1.8mm

Magnetic Head

Solder Joints
(A1)x2

How to remove the sled motor (See Fig. 10-3.)

1. Remove the stop washer (C1) x 1 pc., and remove the drive

gear (C2) x 1 pc.

2. Remove the solder joints (C3) x 3 of flexible PWB.

3. Remove the screws (C4) x 2 pcs., and remove the sled

motor and the left bracket.

4. Remove the screw (C5) x 1 pc., and remove the right

bracket.

Note:

Take care so that the motor gear is not damaged.
(If the gear is damaged, noise is caused.)

MD Mechanism

(C5) x1
ø1.7 x3.5mm

Right
Bracket

Figure 10-1

(B2) x3
ø1.4 x3mm

Spindle
Motor

Figure 10-2

Stop Washer

(C1)x1
Drive Gear
(C2)x1

Solder Joints
(B1)x4

(C4) x2
ø1.4 x1.5mm

Sled Motor

Solder Joints
(C3)x3

– 10 –

MD Mechanism

Cartridge Holder

Left
Bracket

Figure 10-3

How to remove the Lift motor (See Fig. 11-1.)

1. Remove the solder joints (D1) x 2 of the lift motor lead wire.

2. Remove the screw (D2) x 1 pc., and remove the lift motor.

Note:

Take care so that the motor gear is not damaged.
(If the gear is damaged, noise is caused.)

How to reinstall the optical pickup
(See Fig. 11-2.)

1. Remove the screw (E1) x 1 pc., and remove the spring.

2. Slowly raise the optical pickup.

MD-MT180

Lift Motor

SolderJoints
(D1)x2

(D2) x1
ø1.4 x5mm

Figure 11-1

Optical Pickup Unit

Figure 11-2

(E1) x1
ø1.7 x3.5mm

Spring

– 11 –

MD-MT180

ADJUSTMENT

Test disc

MD adjustment needs two types of disc, namely recording disc (low reflection disc) and playback-only disc (high
reflection disc).

Type

Test disc

Parts No.

1 High reflection disc MMD-110 (TEAC Test MD) 88GMMD-110
2 Low reflection disc MMD-212 (TEAC Test MD) 74-minute disc 88GMMD-212
3 Low reflection disc MMD-213A (TEAC Test MD) 80-minute disc 88GMMD-213A
4 Low reflection disc Recording minidisc UDSKM0001AFZZ

Note: Use the low reflection disc on which music has been recorded.

Entering the TEST mode

1. Setting at port (power nonconnected state)

(1) Set the port as follows.
TEST1 : "Low" (TP416)
TEST0 : "High"
(2) Turn the Power ON.
(3) Test Mode START [ T E S T _ ]

2. Setting by special button operation (in standby state)

(1) Holding down the MENU button and ENTER button, press the PLAY button.
(2) Normal mode setting initialization (BASS setting, VOL setting, etc.)
*Since the unit is changed to the setting for production line inspection , be sure to set it to the default setting state in the following default
setting procedure before returning it to the user.
(3) Test Mode START [ T E S T _ ]
(4) When the VOL.+ button is pressed, indication of microcomputer version for one second [ Y 1 2 A c X ]

Destination

Microcomputer version

(5) When the VOL.– button is pressed, whole LCD lighting for 2 seconds

EEPROM version

Leaving the TEST mode

(1) Press the STOP button in the TEST mode stop state.

Shipping setting method

Holding down simultaneously the VOLUME – Button and PLAY Button of the set unit without disc, supply the power from the DC IN plug.
After the indication "INIT" -> "BYE OK" disappears, release the power supply of DC IN.

Test Mode

1. AUTO 1 Mode • Perform preliminary automatic adjustment.

2. AUTO 2 Mode

3. TEST-PLAY Mode

4. TEST-REC Mode

5. MANUAL 1 Mode

6. MANUAL 2 Mode

• If the combination of mechanism and pickup
PWB has been changed, be sure to start from

AUTO1.

• Perform ATT (attenuator) automatic adjustment.

• Perform continuous playback (error rate display,
jump test)

• Continuous playback from the specified address
is performed.

• 1 line, 10 lines or 384 lines manual jump is
performed.

• C1 error rate display (pit section), ADIP error
rate display (groove section)

• The temperature correction is performed only when
servo start is performed, but the posture correction
is not performed during continuous playback.

• Continuous record from the specified address
is performed.

• Change of record laser output(servo gain is also
changed according to laser output).

• The temperature correction is performed only
when servo start is performed, but the posture
correction is not performed during continuous
recording.

• Temperature is displayed. (Updating in real time)

• Seeing the displayed adjustment value, perform

preliminary manual adjustment.
(Error rate indication, jump test)

• Temperature is displayed. (Updating in real time)

• Seeing the displayed adjustment value perform
manfully the preliminary adjustment.

(Error rate indication, jump test)

• Continuous playback is performed

(Error rate display, jump test).

7. RESULT 1 Mode

8. RESULT 2 Mode

9. DIGITAL INPUT Mode

10. ERROR INFORMATION
Mode • Error information is initialized

11. NORMAL Mode

12. EEPROM Mode

13.AUTO J Mode

• The value adjusted in AUTO1 or MANUAL1 is
indicated.

• (Execution in servo "OFF" state").

• The value adjusted in AUTO 2 or MANUAL 2 is
indicated.

• Adjustment value is changed manually.
(Error rate display, jump test).

• Digital input information is displayed.

• Error information is displayed.

• The mode is changed from the TEST mode to
the normal mode without adjustment.

• In the normal mode the internal operation mode,
memory capacity, etc. areindicated.

• In the normal mode both temperature correction
and posture correction are perfomed.

• Factors of digital servo are changed manually.
(Each servo is turned on individually.)

• Cut-off frequency of BASS1, BASS2 and BASS3
is selected manually.

• Temperature detection terminal voltage is
measured, and the reference value is set.

• Defaults are selected and set.

• Setting of EEPROM protect area is updated.
(In case of protect releasing)

•

AUTO 1/2, focus balance adjustment, TEST-

PLAY (ADIP/C1 error check), EEPROM are
updated sequentially.

– 12 –

Operation in each TEST mode

1. AUTO1 Mode

• When the STOP button is pressed while the AUTO1 menu
appears or during automatic adjustment, the mode changes
to the TEST mode stop state. At this time the adjustment
value is not output.

• Be sure to adjust, using the specified disc MMD-213A or
MMD-212.
At this time release the EEPROM (IC402) protection. (Refer
to EEPROM write procedure.)

• Adjustment NG; Adjustment item out of range, focus ON
failure, and adjustment error

• When the PLAY button is pressed while ADJ. OK is
displayed, AUTO2 is executed.

MD-MT180

• Whenever the MENU button is pressed in the continuous
playback mode, the indication changes as follows.
* Pre-mastered disc

Continuous playback (SUBQ address indication)

Continuous playback (C1 error indication)

Continuous playback (SUBQ address indication)

* Recordabl disc

Continuous playback (ADIP address indication)

Continuous playback (C1 error indication)

Continuous playback (ADIP error indication)

[ S Q ]

[ C E ]

[ S Q ]
[ A P ]

[ C E ]

[ A E ]

2. AUTO2 Mode

• When the STOP button is pressed while the AUTO2 menu
appears or during automatic adjustment, the mode changes
to the TEST mode stop state. At this time the adjustment
value is not output.

• Adjustment NG; Adjustment item out of range, and adjust­ment error.

• When the PLAY button is pressed while ADJ. OK is
displayed, TEST_PLAY is executed.

3. TEST-PLAY Mode

• When the STOP button is pressed while the TEST-PLAY
menu appears, or in TEST-PLAY or continuous playback
mode, the mode changes to the TEST mode stop state.

• When the PLAY button is pressed while the TEST-PLAY
menu appears, continuous playback is initiated from the
current pickup position.

• Whenever the MENU button is pressed in the TEST-PLAY
menu, the target address changes as follows.

0032 → 03C0 → 0700 → 08A0 → 0950 → 0032 →
When the PLAY
is displayed, continuous playback is performed after search­ing that address.

• Each time the ENTER button is pressed while the TEST­PLAY mode target address is displayed, the digit which is
changed by pressing the FAST FORWARD/FAST REVERSE

/ button is changed as follows.
0032 → 0032 → 0032 → 0032 →

• When the FAST FORWARD button is pressed in the
TEST-PLAY mode target address is displayed, the digit of
address specified by the ENTER button is set to +1h. (0 to F)

• When the FAST REVERSE button is pressed in the
TEST-PLAY mode target address is displayed, the digit of
address specified by the ENTER button is set to -1h. (0 to F)
*

When the FAST FORWARD/FAST REVERSE /
button is held down, the setting changes continuously, one
cycle being 100 ms.

• When the BASS button is pressed in the continuous play­back mode, the number of jump lines changes as follows.

1 → 10 → 384 → 1 →

* After the number of jump lines is indicated for one second,

the address indication is restored [ T R _ ]

• When the FAST FORWARD button is pressed in the
continuous playback mode, the specified number of lines
is jumped in the FWD direction.

• When the FAST REVERSE button is pressed in the
continuous playback mode, the specified number of lines
is jumped in the REV direction.
* When the FAST FORWARD/FAST REVERSE

button is held down, jump is repeated every

approx. 100 ms.

button is pressed while a target address

........

........

........

/

Continuous playback (ADIP address indication)

[ A P ]

4. TEST-REC Mode

• When the STOP button is pressed while the TEST-REC
menu appears, or in the TEST-REC mode or continuous
record mode, the mode changes to the TEST mode stop
state.

•

When the PLAY button is pressed while the TEST-REC
menu appears, the continuous record is initiated from the
current pickup position.

• Whenever the MENU button is pressed in the TEST-REC
menu, the target address changes as follows.

0032 → 03C0 → 0700 → 08A0 → 0950 → 0032 →
When the PLAY
address is displayed, continuous playback is performed
after searching that address.

• Whenever the ENTER button is pressed in the TEST-REC
mode target address is displayed, the digit which is
changed by the FAST FORWARD/FAST REVERSE /

button changes as follows.

0032 → 0032 → 0032 → 0320 →

• When the FAST FORWARD button Is pressed in the
TEST-REC mode target address is displayed, the digit of
address specified by the BASS button is set to +1h.

• When the FAST REVERSE button is pressed in the
TEST-REC mode target address is displayed, the digit of
address specified by the BASS button is set to -1h.(0 to F)
*

When the FAST FORWARD/FAST REVERSE /
button is held down, the setting changes continuously,
one cycle being 100 ms.

button is pressed while a target

........

........

(0 to F)

– 13 –

MD-MT180

5. NORMAL Mode

• When the STOP button is pressed while the NORMAL
menu appears, the mode changes to the TEST mode stop
state.

• Indication during operation
Indication of memory capacity on main unit LCD
[ ] + Level meter

: Internal mode
: Address (Cluster section)
: Address (Sector section)

• Selection of sound volume, BASS, etc. is possible (without
indication)

• Recording is also possible.

• If the STOP button is pressed during operation in the
NORMAL mode, the NORMAL mode is canceled, and the
power is turned off.

6. Error data display Mode

• Reversing when FAST REVERSE button is pressed

• When the STOP button is pressed while the error data
indication menu appears or during error data indication, the
mode changes to the TEST mode stop state.

• Error data 0 is the latest error.

• Error which occurred in the TEST mode is also stored in the
memory.

• When the MENU button is pressed while the error data
indication menu appears, the error data is initialized.
[ C L E A R _ ]

• : Error Code

Explanation of error history code

13h :

Excessive number of retry to draw servo during its

adjustment.
16h : COUT detection time over during servo adjustment.
17h : The level of input signal from the RF amplifier is out of

the allowable range.
1Fh :Cannot clear the factor of ENDEC DINT.
21h : Cannot focus on the disc.
22h : Cannot start up the spindle.
23h : Track search time over.
32h : Cannot read P-TOC.
42h : Cannot read U-TOC.
44h : Cannot write U-TOC.
45h : Cannot perform write test of U-TOC.
52h : Cannot write SD. (Sound Data)
71h : Time over during initialization of the pickup position.
72h : Check sum error occurred when reading EEPROM.
73h :

Cannot operate the recording head (by using the EJECT

lever).
91h :

The ambient temperature is out of the allowable range.

7. Auto J Mode

• AUTO 1/2, focus balance adjustment, TEST-PLAY (ADIP/C1
error check), EEPROM are updated sequentially.

• If the STOP button is pressed while processed, the same
operation as the normal STOP button operation will be
performed.

– 14 –

MD-MT180

EEPROM (IC402) writing procedure

1. Procedure to replace EEPROM and write initial
value of microcomputer in EEPROM

(1) Replace EEPROM.
(2) Refer to the latest EEPROM data list.
(3) Press the MENU button, ENTER button and Play

button to start the test mode.

(4) Press the VOL.+ button, version display

[ V e r . ]

(5) Press the VOL.– button, the whole LCD lights.
(6) Test mode stop state.

[ T E S T ]

(7) Press the "BASS" button, and press 3 times the "FAST

REVERSE

[ E E P R O M ]

(8) Perform the operation to display "EEPROM SETTING

ENTER CHART", compare the EEPROM DATA LIST
with the display, and set according to the EEPROM
DATA LIST with the VOL.+ or VOL.– button.

(9) Set the temperature reference. (Refer to the Tem-

perature Reference Setting Method.)

(10)

Set according to the EEPROM DATA LIST.

(11)

Press the Stop button.

[ T E S T ]

(12)

Press the Stop button.

(13)

After data is written in EEPROM, turn off power .

(14)

Restore protection of EEPROM.

X

EEPROM version (c ~ z)
Microcomputer ROM version

" button.

2. Temperature reference setting method

[1] Measurement, calculation and setting procedure

(1) Set the TEST mode.

• Set TEST 1, 0 = '01', and turn on power
(or set PLAY ON in standby state).

(2) Press the MENU button, ENTER button and Play

button to start the test mode.

(3) Start the EEPROM mode 'Temp' menu.

• Button operation in order of BASS, FAST REVERSE

x 3 times, PLAY , PLAY in the test mode

STOP state.

• 'TM§§ ' is displayed. (§§= Temperature code,

= Temperature reference)

(4) Once press FAST FORWARD , and determine

the displayed microcomputer TEMP input AD value.

• 'TPin##' is displayed. (## = TEMP input AD value)

(5) At the ambient temperature, determine the tempera-

ture corrected value from the temperature measure­ment value correction table.

(6) Determine the temperature reference, using the fol-

lowing formula.

• Temperature reference = Microcomputer TEMP
input AD value + Temperature corrected value

(7) Set the temperature reference value by button opera-

tion, and check whether the temperature code indica­tion corresponds to "Temperature Code Identification
Table".

[2] Temperature measurement value correction table

Ambient

temperature

+ 9oC ~ +11oC - 05h + 10.0oC
+12oC ~ +14oC - 04h + 12.7oC
+15oC ~ +16oC - 03h + 15.4oC
+17oC ~ +19oC - 02h + 18.2oC
+20oC ~ +22oC - 01h + 20.9oC
+23oC ~ +24oC ± 00h + 23.6oC
+25oC ~ +27oC + 01h + 26.3oC
+28oC ~ +30oC + 02h + 29.0oC
+31oC ~ +33oC + 03h + 31.8oC

Temperature

correction

Center

temperature

[3] Temperature code identification

Ambient

temperature

– 9oC ~ +10oC 08h + 0.5oC

+ 3oC ~ +21oC 07h + 12.5oC
+15oC ~ +33oC 06h + 23.6oC
+26oC ~ +43oC 05h + 35.0oC

– 15 –

Temperature

correction

Center

temperature

MD-MT180

EEPROM DATA LIST (EEPROM version c)

TEMP setting

Item display Set values

T M _ _ Calculate values

Focus setting

Item display Set values

F G 1 _ 4 0 H
F Z H _ E D H
F L n _ 0 9 H
F L p _ 0 6 H
F T s _ 1 8 H
F S B _ 4 0 H
F T B _ 2 8 H
T O 1 _ 5 0 H
T O R _ 5 8 H

Tracking setting

Item display Set values

T G 1 _ 1 4 H
T B o _ 2 0 H
T B t _ 1 2 H
T K o _ 2 0 H
T K t _ 0 D H
T D o _ 6 7 H
T D t _ 3 4 H
S C t _ 3 A H
C L p _ 2 4 H
C L r _ 3 0 H
J P I _ 0 E H
K 1 0 _ 6 5 H
T H P _ 0 2 H
T H G _ 0 2 H
T O P _ 0 0 H
T O G _ F 2 H
T 1 P _ 2 0 H

Spindle setting

Item display Set values

S P G _ 3 0 H
S P i _ 9 A H
S P m _ 6 2 H
S P o _ 4 F H
S D 1 _ 7 F H
S D 2 _ 7 F H
S P K _ E B H
S P W _ 0 F H
S P B _ 6 6 H
S R i _ C 0 H
S R m _ 9 A H
S R o _ 7 B H
S B R _ 6 0 H
O S L _ 1 4 H
P J G _ 4 6 H

Sled setting

Item display Set values

S K S _ 7 F H
S K L _ 7 F H
S L C _ 2 4 H
S T L _ 0 7 H
S T M _ 4 2 H
S T E _ A 6 H
S D V _ 6 0 H
S J P _ 0 3 H
W T m _ 1 8 H
S R V _ 5 4 H
S L T _ 5 C H
M V S _ 0 A H
S L S _ 2 8 H

Sled setting (Continued)

Item display Set values

S K E _ 0 E H
S D E _ 1 C H
B P E _ 7 1 H
B P W _ 7 5 H
B P 1 _ 3 3 H
B R E _ 9 5 H
B R W _ 3 3 H
S R S _ 3 C H

Bass setting

Item display Set values

B 1 A _ 0 0 H
B 2 A _ 0 0 H
B 3 A _ 0 0 H

ADJ. SET setting

Item display Set values

C O K _ 2 8 H
F A B _ 6 4 H
H S G _ 1 1 H
L S G _ 1 2 H

Control setting

Item display Set values

C T 0 _ 0 2 H
C T 1 _ 0 1 H
C T 2 _ 3 2 H
C T 3 _ 5 0 H
T S A _ 2 0 H
U S A _ 1 8 H
P L E _ A 0 H
R C E _ 9 4 H
S D F _ 1 F H
F B 0 _ F C H
B H S _ 0 0 H
B S 0 _ 1 7 H
B S 1 _ 7 0 H
B U 0 _ 0 1 H
B D 0 _ 0 5 H
B D 1 _ D C H
B M K _ 1 E H
B E C _ 0 0 H
C S T _ 6 9 H
I J U _ 8 1 H
I J D _ 5 5 H
M C T _ A 1 H
E R C _ 5 A H
C V 0 _ 1 6 H
C V 1 _ 1 0 H
S S K _ B 9 H
A C T _ 6 3 H
C 1 E _ 5 2 H
A D E _ 0 0 H
F G 2 _ 7 0 H
T G 2 _ 2 A H
M F P _ ◊ ◊ H
S P M _ ◊ ◊ H
M S L _ ◊ ◊ H
U S 0 _ ◊ ◊ H
U S 1 _ ◊ ◊ H
U S 2 _ ◊ ◊ H

◊ ◊ H : CHECK-SUM

– 16 –

Test Mode Change Chart
Test Mode Menu

MD-MT180

T E S T

FAST FORWARD

Slide external
periphery move

BASS

FAST REVERSE

Slide internal
periphery move

FAST REVERSE

A U T O 1

FAST FORWARD FAST REVERSE

A U T O J

FAST FORWARD FAST REVERSE

A U T O 2

FAST FORWARD FAST REVERSE

T P L A Y

FAST FORWARD FAST REVERSE

T R E C

FAST FORWARD FAST REVERSE

M A N U 1

FAST FORWARD FAST REVERSE

M A N U 2

FAST FORWARD FAST REVERSE

R S L T 1

FAST FORWARD FAST REVERSE

R S L T 2

FAST FORWARD FAST REVERSE

D i n M o n

FAST FORWARD FAST REVERSE

E D A T A

FAST FORWARD FAST REVERSE

N O R M A L

FAST FORWARD

FAST REVERSE

E E P R O M

FAST FORWARD

: Test Mode STOP

: Pre-auto adjustment menu

: Auto 1 & 2, Focus balance adjustment menu

: ATT auto adjustment menu

: Pre-manual adjustment menu

: ATT manual adjustment menu

: Pre-adjustment value check menu

: ATT adjustment value check menu

: Continuous playback menu

: Continuous record menu

: Test mode normal playback menu

: Digital input signal monitor menu

: Error history display menu

: EEPROM setting menu

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [PLAY ] button operation is performed in the specific menu, the operation of this
menu is executed.

Preautomatic Adjustment

A U T O 1

PLAY

A T 1

Adjustment error

Normal end

A D J . N G

A D J . O K

PLAY

A T 2

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* " " represent the adjustment number as follows.

0 0 : Innermost periphery move
0 2 : ABEF offset tentative measurement
0 4 : RF side focus gain coarse adjustment
0 5 : Focus ATT tentative setting
0 6 : RF side bit section tracking gain adjustment
0 7 : COUT level setting for pit section adjustment
0 8 : External periphery move
0 9 : RF side groove section tracking gain adjustment
1 0 : COUT level setting for groove section adjustment
1 1 : RF side TCRS gain adjustment
1 2 : Tracking ATT initial setting
1 3 : RF side focus gain minor adjustment
1 4 : Focus ATT initial setting
1 5 : S gain "High" ABEF offset measurement
1 6 : TCRS offset measurement
1 7 : S gain "Low" ABEF offset measurement

: Preautomatic Adjustment menu

: During preadjustment adjustment

: Preadjustment error (adjustment value output)
: Preadjustment normal end (adjustment value output)

: During ATT automatic adjustment

– 17 –

MD-MT180

ATT Auto Adjustment

A U T O 2

PLAY

A T 2

Adjustment error

Normal end

A D J . N G

A D J . O K

ENTER

b # # #

PLAY

S Q # # # #
A P # # # #

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* " " represent the adjustment number as follows.

0 0 : Innermost periphery move
0 3 : Pit section tracking ATT setting
0 4 : Pit section focus ATT setting
0 6 : External periphery move (low reflection only)
0 7 : TCRS ATT setting (low reflection only)
0 8 : Groove section tracking ATT setting (low reflection only)
0 9 : Groove section focus ATT setting (low reflection only)

: ATT auto adjustment menu

: During ATT auto adjustment

: ATT adjustment error (adjustment value output)

: ATT adjustment normal end (adjustment value output)

: Focus balance Adjustment mode

: Continuous playback (high reflection)
: Continuous playback (low reflection)

: Focus balance

# # # : Jitter error

Continuous Playback

• Continuous playback from current pickup position

T P L A Y

PLAY

S Q # # # #
A P # # # #

• Continuous playback from any address

T P L A Y

MENU

A d 0 0 3 2

PLAY

S Q # # # #
A P # # # #

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* In the start address set state the start address changes as follows when the [MENU] button is pressed.
0 0 3 2

H (initial value) 0 3 C 0 H 0 7 0 0 H 0 8 A 0 H

A d 0 0 3 2

* In the start address setting state the start address change digit changes when the [ENTER] button is pressed.
1st digit (initial value) 2nd digit 3rd digit

ENTER ENTER

A d 0 0 3 2

* In the start address set state the value of selection digit changes in the range of "0h to Fh"
when the [FAST FORWARD/REVERSE / ] button is pressed.
* In the continuous playback state the number of jump lines changes as follows shown
the [BASS] button is pressed.

1 (initial value) 10 384

BASS

1 T R

* When the [FAST FORWARD ] button is pressed in the continued playback mode, jump of specified
number of lines occurs in the external periphery direction.
If the key is held down jump occurs continuously (100 ms cycle).
* When the [FAST REVERSE ] button is pressed in the continuous playback mode, jump of
specified number of lines occurs in the internal periphery direction.
If the key is held down, jump occurs continuously (100 ms cycle).

: Continuous playback menu

: Continuous playback (pit section)
: Continuous playback (groove section)

# # # # : Address

: Continuous playback menu

: Start address setting

: Continuous playback (pit section)
: Continuous playback (groove section)

# # # # : Address

A d 0 3 C 0

MENUMENU

A d 0 7 0 0

A d 0 9 5 0 H

A d 0 0 3 2

1 0 T R

A d 0 0 3 2

BASS

3 8 4 T R

MENU

A d 0 8 A 0

MENU

0 9 5 0 H

ENTER

BASS

– 18 –

Continuous Rrecord

• Continuous record from the current pickup position

T R E C

PLAY

A P # # # #

• Continuous record playback from any address

T R E C

PLAY

A d 0 0 3 2

PLAY

A P # # # #

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* In the start address set state the start address changes as follows when the [MENU] button is pressed.

0 0 3 2 H (initial value) 0 3 C 0 H 0 7 0 0 H 0 8 A 0 H

A d 0 0 3 2

* In the start address setting state the start address change digit changes when the [ENTER] button is pressed.

1st digit (initial value) 2nd digit 3rd digit

A d 0 0 3 2

A d 0 3 c 0 A d 0 7 0 0

ENTER

: Continuous record menu

: Continuous record

# # # #: Address

: Continuous record menu

: Start address setting

: Continuous record

# # # #: Address

MENUMENU

A d 0 0 3 2

A d 0 9 5 0

ENTER

A d 0 0 3 2

ENTER

MENU

A d 0 8 A 0

MENU

MD-MT180

Test Mode Normal Playback

N O R M A L

PLAY

@@@@@@

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the NORMAL mode is canceled, the power is turned off.

: TEST mode normal playback menu

: Continuous playback

@@@@@@: Mode and address display

– 19 –

MD-MT180

Error History Display

• Error history clear

E D A T A

MENU

C L E A R

• Error history display

E D A T A

PLAY

E 0 § §

FAST FORWARD FAST REVERSE

E 1 § §

FAST FORWARD FAST REVERSE

E 2 § §

FAST FORWARD FAST REVERSE

E 3 § §

FAST FORWARD FAST REVERSE

E 4 § §

FAST FORWARD FAST REVERSE

E 5 § §

FAST FORWARD FAST REVERSE

E 6 § §

FAST FORWARD FAST REVERSE

E 7 § §

FAST FORWARD FAST REVERSE

E 8 § §

FAST FORWARD FAST REVERSE

E 9 § §

FAST FORWARD FAST REVERSE

: Error history display menu

: Error history clear

: Error history display menu

: Error history 0 display

§ § : Error code

: Error history 1 display

§ § : Error code

: Error history 2 display

§ § : Error code

: Error history 3 display

§ § : Error code

: Error history 4 display

§ § : Error code

: Error history 5 display

§ § : Error code

: Error history 6 display

§ § : Error code

: Error history 7 display

§ § : Error code

: Error history 8 display

§ § : Error code

: Error history 9 display

§ § : Error code

RC :

: Total Recording Time

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.

EEPROM Setting

E E P R O M

PLAY

T e m p

FAST FORWARD FAST REVERSE

FAST REVERSE

F o c u s

FAST FORWARD FAST REVERSE

T r a c k

FAST FORWARD FAST REVERSE

S p i n

FAST FORWARD FAST REVERSE

S l e d

FAST FORWARD FAST REVERSE

B a s s

FAST FORWARD FAST REVERSE

A D J S E T

FAST FORWARD FAST REVERSE

C T R L

FAST FORWARD FAST REVERSE

FAST FORWARD

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [PLAY ] button operation is performed in the specific state, the specific setting menu is set.

L S I _I F

: EEPROM setting menu

: TEMP setting menu

: Focus setting menu

: Tracking setting menu

: Spin setting menu

: Sled setting menu

: BASS setting menu

: Adjustment setting menu

: Control setting menu

: LSI setting menu

– 20 –

Focus Setting

MD-MT180

F o c u s

PLAY

: Focus setting menu

F G 1

FAST FORWARD FAST REVERSE

F Z H

FAST FORWARD FAST REVERSE

F L n

FAST FORWARD FAST REVERSE

F L p

FAST FORWARD FAST REVERSE

F T S

FAST FORWARD FAST REVERSE

F S B

FAST FORWARD FAST REVERSE

F T B

FAST FORWARD FAST REVERSE

T O 1

FAST FORWARD FAST REVERSE

T O R

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [MENU] button operation is performed in the specific state, the menu changes to
"TEMP SETTING menu".
* In specific state the setting changed in the range of "00h to FFh" when the [VOL.+/–] button
is pressed.
(The upper limit varies depending on the items)
* When the [ENTER] button is pressed in each state, the set digit is changed.

Spin Setting

S p i n

PLAY

: Spin setting menu

S P G

FAST FORWARD FAST REVERSE

S P i

FAST FORWARD FAST REVERSE

S P m

FAST FORWARD FAST REVERSE

S P o

FAST FORWARD FAST REVERSE

S D 1

FAST FORWARD FAST REVERSE

S D 2

FAST FORWARD FAST REVERSE

S P K

FAST FORWARD FAST REVERSE

S P W

FAST FORWARD FAST REVERSE

S P B

FAST FORWARD FAST REVERSE

S R i

FAST FORWARD FAST REVERSE

S R m

FAST FORWARD FAST REVERSE

S R o

FAST FORWARD FAST REVERSE

S B R

FAST FORWARD FAST REVERSE

O S L

FAST FORWARD FAST REVERSE

P J G

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [MENU] button operation is performed in the specific state, the menu changes to
"TEMP SETTING menu".
* In specific state the setting changed in the range of "00h to FFh" when the
[VOL.+/–] button is pressed.
(The upper limit varies depending on the items)

* When the [ENTER] button is pressed in each state, the set digit is changed.

– 21 –

MD-MT180

Tracking Setting

T r a c k

PLAY

T G 1

FAST FORWARD FAST REVERSE

T B o

FAST FORWARD FAST REVERSE

T B t

FAST FORWARD FAST REVERSE

T K o

FAST FORWARD FAST REVERSE

T K t

FAST FORWARD FAST REVERSE

T D o

FAST FORWARD FAST REVERSE

T D t

FAST FORWARD FAST REVERSE

S C t

FAST FORWARD FAST REVERSE

C L p

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [MENU] button operation is performed in the specific state, the menu changes to
"TEMP SETTING menu".
* In the specific state the setting changes in the range of "00h to FFh" when the [VOL.+/–] button
is pressed. (The upper limit varies depending on the items)
* When the [ENTER] button is pressed in each state, the set digit is changed.

: Tracking setting menu

FAST FORWARD FAST REVERSE

C L r

FAST FORWARD FAST REVERSE

J P I

FAST FORWARD FAST REVERSE

K 1 0

FAST FORWARD FAST REVERSE

T H P

FAST FORWARD FAST REVERSE

T H G

FAST FORWARD FAST REVERSE

T O P

FAST FORWARD FAST REVERSE

T O G

FAST FORWARD FAST REVERSE

T 1 P

Sled Setting

S l e d

PLAY

: Sled setting menu

S K S

FAST FORWARD FAST REVERSE

S K L

FAST FORWARD FAST REVERSE

S L C

FAST FORWARD FAST REVERSE

S T L

FAST FORWARD FAST REVERSE

S T M

FAST FORWARD FAST REVERSE

S T E

FAST FORWARD FAST REVERSE

S D V

FAST FORWARD FAST REVERSE

S J P

FAST FORWARD FAST REVERSE

W T m

FAST FORWARD FAST REVERSE

S R V

FAST FORWARD FAST REVERSE

S L T

FAST FORWARD FAST REVERSE

M V S

FAST FORWARD FAST REVERSE

S L S

FAST FORWARD FAST REVERSE

S K E

FAST FORWARD FAST REVERSE

S D E

FAST FORWARD FAST REVERSE

B P E

FAST FORWARD FAST REVERSE

B P W

FAST FORWARD FAST REVERSE

B P 1

FAST FORWARD FAST REVERSE

B R E

FAST FORWARD FAST REVERSE

B R W

FAST FORWARD FAST REVERSE

S R S

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [MENU] button operation is performed in the specific state, the menu changes to
"TEMP SETTING menu".
* In the specific state the setting changes in the range of "00h to FFh" when the
[VOL.+/–] button is pressed.
(The upper limit varies depending on the items)
* When the [ENTER] button is pressed in each state, the set digit is changed.

– 22 –

TEMP Setting

MD-MT180

T e m p

PLAY

T M § §

FAST FORWARD FAST REVERSE

T p i n

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [MENU] button operation is performed in the specific state, the menu changes to
"TEMP SETTING menu".
* In the specific state the setting changes in the range of "00h to FFh" when the
[VOL.+/–] button is pressed.
* When the [ENTER] button is pressed in each state, the set digit is changed.

: Temp setting menu

: TEMP reference

: TEMP A/D input value

: Reference

§ § : Temperature code
: Measurement value

Adjustment Setting

A D J S E T

PLAY

: Adjustment setting menu

C O K

FAST FORWARD FAST REVERSE

F A B

FAST FORWARD FAST REVERSE

H S G

FAST FORWARD FAST REVERSE

L S G

* When the [STOP ] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [MENU] button operation is performed in the specific state, the menu changes to
"TEMP SETTING menu".
* In the specific setting display state the setting change digit changes when the [ENTER]
button is pressed.

1st digit (initial value) 2nd digit

* In the specific state the setting changes in the range of "0h to Fh" when the [VOL.+/–]
button is pressed.
* When the [ENTER] button is pressed in each state, the set digit is changed.

ENTER
ENTER

– 23 –

MD-MT180

Control Setting

C T R L

PLAY

: Control setting menu

C T 0

FAST FORWARD FAST REVERSE

C T 1

FAST FORWARD FAST REVERSE

C T 2

FAST FORWARD FAST REVERSE

C T 3

FAST FORWARD FAST REVERSE

T S A

FAST FORWARD FAST REVERSE

U S A

FAST FORWARD FAST REVERSE

P L E

FAST FORWARD FAST REVERSE

R C E

FAST FORWARD FAST REVERSE

S D F

FAST FORWARD FAST REVERSE

F B O

FAST FORWARD FAST REVERSE

B H S

FAST FORWARD FAST REVERSE

B S 0

FAST FORWARD FAST REVERSE

B S 1

FAST FORWARD FAST REVERSE

B U 0

FAST FORWARD FAST REVERSE

B D 0

FAST FORWARD FAST REVERSE

B D 1

FAST FORWARD FAST REVERSE

B M K

FAST FORWARD FAST REVERSE

B E C

FAST FORWARD FAST REVERSE

C S T

FAST REVERSE
FAST FORWARD

U S 2

FAST FORWARDFAST REVERSE

U S 1

FAST FORWARDFAST REVERSE

U S 0

FAST FORWARDFAST REVERSE

M S L

FAST FORWARDFAST REVERSE

S P M

FAST FORWARDFAST REVERSE

M F P

FAST FORWARDFAST REVERSE

T G 2

FAST FORWARDFAST REVERSE

F G 2

FAST FORWARDFAST REVERSE

A D E

FAST FORWARDFAST REVERSE

C 1 E

FAST FORWARDFAST REVERSE

A C T

FAST FORWARDFAST REVERSE

S S K

FAST FORWARDFAST REVERSE

C V 1

FAST FORWARDFAST REVERSE

C V 0

FAST FORWARDFAST REVERSE

E R C

FAST FORWARDFAST REVERSE

M C T

FAST FORWARDFAST REVERSE

I J D

FAST FORWARDFAST REVERSE

I J U

– 24 –

MD ERROR MESSAGE DISPLAY CONTENT LIST

MD-MT180

Display content

Can' t READ*

Can' t READ*

Can' t READ*

Can't LOCK

Er-MD41

Er-MD80

TOC FORM** Abnormal data DISC detection L*: UTOC SELECTOR is Loop * indicates the detailed factor.

NAME FULL

OPEN The disc compartment is open. Open lid is detected while the

Readout of the information
completed.

Readout of the TOC information
is not completed.

Readout of the U-TOC information
is not completed.

The EJECT lever cannot be locked.

Judged it abnormal by the U-TOC
write test.

EEPROM readout Check sum error

The number of characters for names
exceeds the specification limit.

Error content

is not

f: Focus error
r: READ ERR
s: Search time over
w: SD write time over
p: Time over at spindle start-up

a_: Address abnormal
t_: FTNO > LTNO

Error code

* indicates the detailed factor.

system is running.

Remarks

– 25 –

MD-MT180

NOTES ON SCHEMATIC DIAGRAM

• Resistor:
To differentiate the units of resistors, such symbol as K and
M are used: the symbol K means 1000 ohm and the symbol
M means 1000 kohm and the resistor without any symbol is
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.

• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means micro-micro-farad and the unit of the
capacitor without such a symbol is microfarad. As to electro­lytic capacitor, the expression “capacitance/withstand volt­age” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type

TOP VIEW

B

(G)

(3)

E

TOP

VIEW

C
(D)
(2)

(S)

1

2SB1462 J

MA132WK
2SD1819 AS
DTC123 TKA
KTA2015 Y
MCH3409
UN5210
UN5213

• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas­sis with no signal given.

• Parts marked with “ ” ( ) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.

REF. NO

SW401 EJECT OFF—ON
SW403 LID OPEN OFF—ON
SW601 DISC PROTECT OFF—ON

TOP VIEW

DESCRIPTION

S

POSITION

TOP

VIEW

F10J2E
F05J2L

GD

2SJ520 TL

TOP VIEW

HRB0103B

TOP VIEW

RB731U

Figure 26 TYPES OF TRANSISTOR AND DIODE

TOP VIEW

SBE803

XP01401

– 26 –

+2.5V

VCCMICOM

SPINFG

PCNT1

+2.5V

VCC+2.5V

+2.5V

+2.5V

+2.5V

+2.5V

+2.5V

+2.5V

–2.5V

+2.5V

FT

+2.5V

+2.5V

+2.5V

+4.5V

+4.5V

–2.5V

VGBATT

DC-IN (5V)

J801

PS801

CHARGING

TERMINAL(1.5V)

BATTERY

(1.2V)

MMM

SPINDLE

MOTOR

LIFT

MOTOR

SLED

MOTOR

M902

M903

M901

MOTOR

DRIVER

LB1930M

IC651

REGULATOR

62FP1602

IC902

ENDEC/SERVO/

ATRAC

LR378161

IC201

HEAD DRIVER

74ACT02T

MCH6616

CPH5608

IC351

IC353

IC354

MAGNETIC

HEAD

RF SIGNAL

PROCESSOR

IR3R58M

IC101

OPTICAL PICUP

LASER

OPIC

PICK

16M BIT

D-RAM

IX2824AF

IC202

LCD UNIT

OPTICAL/

LINE-IN

J701

AUDIO AMP.

IR3R54N

IC701

AUDIO AMP.

IR3R59N

IC703

HEADPHONES

KEY SWITCH

PWB

SW401 EJECT

SW403

LID OPEN

J703A

AD/DA

CONVERTER

AK4551VT

IC501

PWM/MOTOR DRIVER

LV8201W

IC601

EEPROM

58X2402T

IC402

SYSTEM

MICROCOMPUTER

IX0529AW

IC401

2.3V

REGULATOR

6204B23M

IC771

4.5V
REGULATOR

6204B45M

IC873

1.1A

F841

IC801 MM3032A

3.0V REGULATOR

IC802 XP04501

IC803 S80819LN

RESET

Q801,Q803,Q891

Q250,Q251,Q257

Q851

Q461

DC/DC

CONVERTER

IR3M14N

IC852

0.4A,DC60V

2.5V UP
CONVERTER

6372C251

IC841

EXCLUSIVE

OR GATE

74HC1G86

IC871

RESET

S80820LN

IC431

IC253,260,809 XP04313

IC256 XP04315

IC258,259,892 XP04501

IC255 NJM022V OPE AMP.

IC257 S80808LN RESET

IC251 FTD2017 N-CH MOS FET

PLAYBACK SIGNAL

RECORD SIGNAL

MD-MT180

– 27 –

Figure 27 BLOCK DIAGRAM

MD-MT180

+

+

B

A

A

G

O

N

N

Y

Y

9

4

5

6

7

8

E

3

4

D

D

2

MAIN PWB-A

1+2

DIFF

+B

1

C107

C112

0.033

PIN

3+4

BIAS

FIN

EIN

R137

R138
390K

TP351

VCCHEAD

SPDRF

SLCNT3
SLCNT2
SLCNT1

L605
22µH

C109

1

1

0.22

C108

C110

0.033

C106

220K

R112

GND1

VCC1

EFMAGC

BIAS

NIN

PITG

GND2

BPF

MODE

FSW

TCGO

EOUT

BOUT

AOUT

FOUT

TCGI

56K

TP130

TP131

TP132

TP133

R140

390K

+B

L171
10µH

C172

33/6.3

C171

33/6.3

Q901

UN5210

100K

R920

SPIN

IC651

LB1930M

MOTOR
DRIVER

6

5

G

G

4

7

O2

I2

3

8

I1

O1

2

9

VCC

10

1

LDCNT2

R603
R604
100K

33

SEL

34

PWM

VS3

35

GND1

OUT3

36

PGND3

37

SWO

38

PGND4

39

SVO

40

VS4

41

SUO

42

FG

43

49

CP2

VCC2

44

CP1

50

IN3

45

S3

46

S2

47

S1

RF

VS

CPC1

CPC2

VG

48

49 50

51 5253 54 55 565758 59 60 6162 63 64

C612

0.1
C611

0.1

1

1M

R605

C615

1

PWM/MOTOR DRIVER

C605

1

EFMO

DCNF

373839404142434445464748

C131

0.1

2-1

36

ADAGI

35

ADAGC

34

AGC

ADIP

ADIPNF

33

ADIPO

32
31

WBO

30

VCC2

29

OPICPW

SW

28

CK102

DISC

27

SGAIN

26

TEMP

25

DTEMP

RFADD

R139

39K

0.22

C133

LDON
LDVAR
OPICGA

TP171

+B

TP665

C652

0.1
D651

F10J2E

LDCNT1

+B

1

C621

330K

120K

R602

20212223242526272829303132

RMIN

VCTL

RMAX

VCOIN

VCREF

S/S

17

OUT2F

BRK

PGND2

18

PGND1

VCO

19

OUT1F
OUT1R

WCIN

63

COMIN

64

WOUT

UOUT

RF2

UCIN

VS

VOUT

C617

0.0047

IC601

LV8201W

C113

R403

13

MUTE
OUT2R

VCC1

GND2

C132

1K
3

VS2

VS1

IN2R
IN2F

IN1R

VCIN

COM

C618

C111

R132

R134

1

5P(CH)

C114

1234

RF1

1

RF2

2

and

RF3

3

SW

RF4

4

1

REFI

5

TP144

6

AOUT

7

ASW

R131

8

120K

AIN

9

BIN

10

BSW

11

R133

820K 820K

12

120K

BOUT

R136

390K

12K

R111

R

REFO

ESW

EOU

13 14 15 16 17 18 19 20 21 22 23 24

56K

R135

A

IC101

IR3R58M

RF SIGNAL

PROCESSOR

1

C103

C102

B

15

+B

L101

100mA

C

CN101

TP101

1234

1

LDVAR

TP103

TP102

LDON

DGND

5

DGND

TP105

VCC

TP107

TP111

TP110

TP108

TP106

10 1112 13 14 15 1617 18 19 202122

8

9

6

7

A

B

RF2

COM

MP/R

CVCC

AGND

OPIC

VCC

TP115

TP114

RF4

RF3

TP116

E

TP117

F

RF1

TP119

TP118

T+

TP120

F+

OPTICAL PICKUP (1)

+B

D

C357

0.1

43

5

S

G2

G1

C351

D2

D1

12

IC354

E

CPH5608

HEAD DRIVER

GND

8

7

9

6

1

0

5

1

4

1

2

3

1

3

2

1

VCC

4

1

1

C354

0.1
C353
10/6.3

D351

SBE803

3

4

(CH)

C361

0.039

5

R361

15

2
1

IC353

MCH6616

HEAD

DRIVER

47P

T–

6

123

F–

5
D1
S1

TP121

TP122

22

4
G2
G1

2

IC351

S2
D2

R161

1.2K
F–
F+
T+
T–

C165

0.033

HEAD

DRIVER

74ACT02T

F

1

R611

R610

TP661

TP659

TP658

TP657

TP656

TP660

TP655

TP654

TP653

TP652

TP651

CN601

4321

8

9

1011

6

5

G

MAGNETIC

HEAD(20)

M

M901
SPINDLE
MOTOR

7

11

COM
W
V
U

MECHANISM
FLEXIBLE PWB (19)

1

M902
SLED
MOTOR

U
W
V

M

+

M

–

M903
LIFT
MOTOR

+B

0.22

1

+B

+B

+B

R404

100K

1

2
SW601
DISC
PROTECT

TP602

C620

0.0068

171819

16

NC

15
14
13
12
11
10

9
8
7
6
5
4
3

IN1F

2
1

C619

0.0047

0.0047

1

C608

R101

CK100

DISCPR

+B

C613

1

L602

22µH

22K

L601
22µH

PLAYBACK SIGNAL
RECORD SIGNAL

CK139

EFMO

SPDRR

DCNT1

C602

C604

TRDRR
TRDRF
FODRR
FODRF

TP610

1

1

C122
220P
(CH)

C121
220P
(CH)

11

10

4

CK211

C204

CK208

CK209
CK210

3

0.47

+B

1

FOK
SENSE
CIN

DINT

+B

R204

1K

XRT
SYD0

SYD1
SYD2
SYD3

+2.5V

SYD4
SYD5
SYD6
SYD7
SYWR
SYRD
SYRS

+B

1

C601

+B

1

C603

+B

L604
22µH

L603

R102

22µH

CK108

14

22K

CK203

CK204

CK205

CK206

9

TP201A

R422

CK202

CK201

TP209

TP210

C203

100K

TP208

0.1

C221

22P
(CH)

76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99

100

TP201

TEMON

HDON

OPTCNT
DAPON
ADPON
FOK
SENSE
COUT
MCCK
DINTX
VDD2
DGND
RSTX
SYSD0
SYSD1
SYSD2
SYSD3
SYSD4
SYSD5
SYSD6
SYSD7

EFMMON

234

1

HDON

RCAULT
MCPGIN
INPGIN
INPGCK

TP416
TP417

OPICGA
PBMUTE
PBAULT
LDON
DISC
SGAIN

L204

AVCC

C207

SYD7

AUSCLK

TP202

XL201

33.8688MHz
C211

100mA

680

R207

BCLK

LRCK

DFCK

DGND

73
74

FEMON

75
76

ENDEC/SERVO/

98
99
100

WBI

AGND

EFMI

AVCC2

VREF

6

5

7

C209

0.1 0.1

SYD3

SYD4

SYD5

SYD6

26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

+B

AUDATA

5P(CH)

1M

R222

TP204

CK207

DIN

DOUT

PLLBVC

ADDATA
DADATA

TOTMON

LR378161

ATRAC

SYWRX
SYRDX
SYRS

TCG

AIN

BIN

10 1112 13 14 151617 18 19 2021 22

8

9

SYD1

SYD2

SYD3
SYD4
SYD5
SYD6
SYD7
VSS
RCLAT
MCPGI
INPGI
INPGCK
RCPCNT
TEST1
TEST0
JPNP
VCC
OPICGA
PBOPON
PBLAT
LDON
DISCP
SGAIN
RACLK

SLCNT2

SLCNT1

51 5253 54 55 5657 58 59 606162 63 64 6566 67 68 6970 71 72 737475

SLCNT2

SLCNT1

LDCNT1

LDCNT2

C212

8P

(CH)

X1I

VXI

X1O

VPO

VDD1

EMPH

DGND

LDCNT1

LDCNT2

X700KO

51
52

TCRS

53

TEST0
TEST1

54

IC201

SLDRR

23
24

SPDRF

25

SPDRR

VBAT

FODRR

FODRF

TEST2

X176KO

FIN

EIN

DGND

VDD1

0.1

TP206

C205

FODRR

TP207

R206

FODRF

100K

27K

R205

+B

TP409

TP411

SYD0

SYRS

SYRD

SYWR

1K

R416

1K

R414

PE4

VSS

EPRT

EEPK

SYRS

EEPD

SYRD

SYWR

SYD0

23
24

SYD1

25

SYD2

IC401

IX0529AW

SYSTEM

MICROCOMPUTER

48

RADAT

49

VSS

50

DLBHP

DCEXT

EMPH0

DHLAT

SLCNT3

BUZOUT

MD0

MD1

WDT0VF

MD2

CK403

EMPH0

BEEP

SLCNT3

D431

MA132WK

R431

C431

330K

0.47

+B

525354555657585960616263646566676869707172737475

EFMO

PLCK

ACRCER

DILOCK

LEDON1

RAA11

RAD0
RAD1

RAWEX

RARASX

RAA9
RAD3
RAD2

RACASX

DGND

RAOEX

RAA8
RAA7
RAA6
RAA5
RAA4
VDD2

RAA10

RAA0
RAA1
RAA2
RAA3

TRDRF

TRDRR

SLDRF

24 25

23

TRDRF

TRDRR

+B

58X2402T

R412
15K

R411

100K

5

TP408

6
7

TP411A

8

1K

R415

DSPSTB

DSPSCK

10111213141516171819202122232425

SCK0

EPCS

DSPSTB

DSPSCK

NMI

RESET

µSTBY

VCC

XL401

4.19MHz

AURESET

IC431

S80820LN

OUT
VDD

RESET

TP212

CK225

51

TP205

50
49

CK224

48

TP203

47

CK222

46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26

12

SPDRF

SPDRR

C100
10/6.3

IC402

EEPROM

DSPDAT

8

9

7

RMDAT

DSPDAT
CIN

1
2

SPIN
RFPCNT

3

78

Vref
AVCC

77

ARQK

76

XTAL

EXTAL

VSS

TP400

4321

VSS

+B

C201

10/6.3

L100

10µH

4
3
2
1

6

VSS

LCDRST

PLAY

REC

TP410

DISCPR
4321

5

SPWDS

DISCPR

CKSTP

SENSE
DCNT1
PLVON

MCMON

CHGON

LDVAR

CHGCNT

HKEY2
HKEY1

CHIMON

PLVBAT

STOP

PF4

R461

EFMO

SPIN

PCNT1
PCNT2

VCC

EJSW
XRST

FOK

VSS

AVSS

RKEY
TEMP

DINT

TP441

100K

R463

CIN

ARQD

RPLAY

100K

TP407

R413

100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76

RPLAY
TP402

R402

VCC4R5

3
2

C454

0.0022

100K

1K

R464

R423

1

4

RB731U
3
2
1

R465

220K

R405
10K

TP401

22K

D461

100K

TP415

SW403

CK200

VCCDRAM

TP406
R406
10K

CK405

C401

0.1

TEMP

22K

R425

R424

RKEY
DINT

LID OPEN

4
5

6

1
2
3
4
5
6

7
8

9

10
11
12

33/6.3

L202

3
2

XRT
FOK
SENSE

LDVAR

22K

1SS389

R466

VCC
I/O1
I/O2
WE
RAS

A10
A0
A1
A2
A3
VCC

C202

IX282

16M
D-R

10µH

4

1

D467

560K

GN

CAS

GN

IC

VCC2R

SW401

PC
PC

PLV
CH

CHGC
HKE

PLVB

22K

R467

I/O
I/O

HKE

C13

O
A

A
A
A
A
A

EJECT

0.1

H

• NOTES ON SCHEMATIC DIAGRAM can be found on page 26.

• The numbers 1 to 15 are waveform numbers shown in page 44.

1

23456

Figure 28 SCHEMATIC DIAGRAM (1/4)

– 28 –

MD-MT180

TP407

C454

1K

R413

100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76

P402

R402

100K

VCC4R5

1

3
2

4

R464

0.0022

R405
10K

TP401

22K

R423

D461

RB731U

3
2
1

R465

100K

220K

CK200

TP415

C401

0.1

22K

R425

RKEY
DINT

SW403

LID OPEN

4

5

6

1

VCC

2

I/O1

3

I/O2

4

WE

5

RAS

6

A10

7

A0

8

A1

9

A2

10

A3

11

VCC

12 13

C202

33/6.3

IX2824AF

16M BIT

VCCDRAM

D-RAM

L202

10µH

VCC2R5V

4

3
2

1

TP406
R406
10K

CK405

XRT
FOK
SENSE

LDVAR

TEMP

R424

22K

D467

1SS389

560K

R466

GND

I/O4
I/O3

CAS

OE

A9
A8

A7
A6
A5
A4

GND

IC202

EJECT

SW401

PCNT1
PCNT2

PLVON
CHGON

CHGCNT
HKEY2
HKEY1

C130

0.1

PLVBAT

22K

R467

24
23
22
21
20
19

18
17
16
15
14

DCNT1

+B

HREC
HPLAY

STOP

+B

DADATA
ADDATA
DFCK

BCLK
LRCK
ADPON
DAPON
OPTCNT
DIN
EMPH1

+B

IC501

AK4551VT

AD/DA

CONVERTER

PCNT1

+B

R891

43

2

+B

1

5

1

C837

6204B45M

4.5V REGULATOR

C860

10/6.3

PCNT2
PLVBAT
CHGON
PLVON
CHGCNT

IC873

L860

100µH

C836

R717

1K

Q711

DTC123 TKA

R715
100K

1

C714

C712

100P(CH)

10K

R728A

L452

150mA

TP722
TP724

100mA

TP723

TP806

R802

321

Q891

4

5

OUT
VDD

4

OUT
VDD

3 2

RESET

1
R257

27K

R252

150K

0.1

C252

R271

68K

R270

C255

0.1

LCD UNIT

R718

C715

0.1
C713
1

L702

L703

C716

0.1

C711

100P

(CH)

PS801

1.1A

R803

560

1.2K

D802

XP01401

R806

56K

4 321

VSS

IC803

S80819LN

RESET

+B

EXCEPT FOR

+B

VSS

100

R272

4

6

5

123

68K

(229)

LCD

LCD

DRIVER

1K

TP706

7

VCC

TP708

9

Vout

TP707

8

GND

R713

10K

TP701

1

TP702

L

2

TP703

3

TP704

GND

4

L704

5

TP705

R714

10K

L702~704:100mA

4

L-CH

2

R-CH

3
1

J703A

HEADPHONES

D801

F05J2L

CK805

L800

100MHz

TP805

1

TP801

2

TP802

3

L801

R808

MA8051M

100MHZ

1

R810

1

VCCBATT

C864

0.1

C865

0.1

CB

C866

,

0.1

C867

0.1

MAIN PWB VERSION

TP803

TP804

IC256

XP04315

J701
OPTICAL/
LINE-IN

R

J801

DC-IN

5V

BATTERY

TERMINAL(227)

BATTERY

TERMINAL(211)

CHARGING

TERMINAL(226)

CN451

CN482

R719

6.8K

101112

9

LOUT

RIHP

R702

22

C702

10/6.3

R+

L+

C492

R766

L-CH
R-CH

C766C765

0.220.22

IC802

10K

XP04501

R816

1.5K

1
2

22K

R819

C818

Q250

KTA2015 Y

Q257
2SB1462J

6
5
43

R251

100

R288

47K

1
2
3
4
5
6
7
8
9

10
11
12

1
2
3
4
5
6
7

R720

6.8K

8

7

AGND

LIHP

DGND

VEE

D495

1

15

R767

4.7

R768

4.7

Q461

Q801

2SD1819 AS

2SJ520 TL

S

1

6

2

5
43

6
5
43

R818

560K

0.1
G2

5

S2S2S1

6
7
8

R294
100K

R281
22K

2
1

R282

R285

100K

2
1

R269

1

12

6

RI

VCC

C701

IC703

IR3R59N

MA8075M

G

0.01

C802

G1

S1

DD

1M

R255
C251

56K

0.1

R256

R261

1K

R262
120K

39K

BASS
REC
MENU
DOLBY
ENTER
STOP
PLAY
SKIP DOWN
VOL DOWN
VOL UP
SKIP UP
GND

KEY SWITGH
FLEXIBLE PWB (228)

7

1

R712

6.8K
R711

6.8K

0.1

C734
5

R703
100K

10/6.3

LI

4321

C703

100

R701

0.1

C733

L-CH

R-CH

R716

100K

0.01

AUDIO AMP.

D496

MA8075M

TP729

L454

L453

100mA

R460

68K

27K

R462

L802

R809

100MHz

1

D

R807

R811

22K

1

R812

D803

10K

R813

10K

32
4

IC809

XP04313

4
3
2
1

IC892

XP04501

1
2

R293
680

2.2K

R286

4.7K

8

V+

1 2 3 4

1SS388

1

C801

IC801

MM3032A

3.0V REGULATOR
IC251

FTD2017
N-CH MOS FET

R296

6

47K
5
4 3

R292
100K

S80808LN

Q251

R291

100

2SD1819 AS

C253

R254

0.1

22K

R253

6

5

7

39K

–

+

O

MA111

D251

+ –O

V-

IC255

NJM022V

OPE AMP.

47K

R266

C254

0.1

10K

R267

R250

100

+B

1

IC257

1

C291

HREC
HKEY2

HPLAY
HKEY1

STOP

IC902

62FP1602

REGULATOR

21

+B

3

+2.5V

+B

1

4321

8

6

5

7

VDD

DEM1

DEM0

SDTO

MCLK

SDTI

SCLK

LRCK

10 11 12 13 14 15 16

9

VSS

PWAD

C501

AINL

0.0022

AINR

AOUTL

PWDA

R501C509

470

R502

470

C502

0.0022

VCOM

AOUTR

6

C503

C551

2.2

C510

0.022

2.2

3.3/10
TP500

VCCADDA

+B

C511

IC501

5

8

+2.5V

7

C856

68P
(CH)

C839

+B

EMPH0

C863

D821

M1FH3

R856

3.3M

0.33

C773

0.22

+2.5V +B

-2R5

1

M1FH3

C853

220/4

IC771

6204B23M

1

+B

2

2.3V

REGULATOR

D862

F10J2E

D861

F10J2E

D851

C862

D

G

C852

22/6.3

S

Q851

D

L821

G

10µH

S

Q821

MCH3409

C857

18P

R854

(CH)

10K

330K

R857

R832

180K

R853
270K

C848

5

C774

43

1

IC871

74HC1G86

1
2

100K

R871

EXCLUSIVE

L851

OR GATE

1

10µH

+B

MCH3409

1

C821

IC852

IR3M14N

GND

ERRAMP

5

RSFF

Q

EO

BUF

EIN

R

S

6

CMP

EIP

VREF

7

STAND

OSC

8

CTRL

ROSC

DC/DC

CONVERTER

0.1

C846

C847

0.1

GND

C851

BY

C771

C869

1

0.1

+B

+B

33/6.3

47/6.3

4
3
2
1

OUT

VCC

VCC

C845D843 D842

+B

TP771

AUSCLK

RCAULT

5
4 3

1

C830

0.1HRB0103B HRB0103B
R844

47

TP860

TP772

AUDATA

+B

C876

1

+B

0.22

C843

VGBATT

VCCMICOM

+B

+B

+B

+2.5V

R892

10K

47K

R855
390K

R831

180K

1

R457

R456

5.6K

8.2K

R451

5.6K

INPGCK
INPGIN

MCPGIN

R754
150K

TP412

100

R758

2.2K

R757

0.1

C760

PBMUTE

BEEP

AURESET

IC841

6372C251

2.5V UP

CONVERTER

D841

1

C842

33/6.3

5

2

43

R850
100K

0.1

C850

R277

F10J2E

R458

18K

R453
18K

R452

8.2K

DSPDAT
DSPSCK
DSPSTB

+B +B

C758

1

R762

R761

150K

100K
8

9

101112

HP

BIAS

BEEP

AMPuGAIN SEL.

RHPVCC

LOGIC

AMPuGAIN SEL.

13 14 15 16 17 18 19 20 21 22 23 24

LAT

DAT

CLK

LHPVCC

PBAULT

F841

0.4A,DC60V

TP842

L841

22

C841

IC259

XP04501

4 3

2

5

1

6

39K

R279

100

CK809

TP451
TP452
TP453
TP454
TP455
TP456
TP457
TP458
TP459
TP460
TP461
TP462

TP481

R481

TP482

33K

C482

TP483

0.01

TP484

R483 R482

7

RHPVEE

LHPVEE

DCVDD

1

C259

TP485

18K 18K

TP487

C481

0.1

ROUT

IC701

IR3R54N

13 14 15 16 17 18 19 20 21 22 23 24

AUDIO AMP.

C762

2.2

C754

1

4321

6

5

RLPFO

R–

RIN

ATT

LPF

LPF

ATT

LLPFO

LIN

L–

2.2

C761
R765

15

C753

1

+B

+B

R814

10K

R815

C840

220/4

Q803

UN5213

TP841

R295
100K

IC253

43
5
6

R283

100K

XP04313

R287

560K

1

390K

R284

2

IC258

XP04501

43

0.1

5
6

+B

IC260

XP04313

D281

MA111

IC253,260,809 POWER SELECT CHARGE DRIVER
IC256 DIGITAL TRANSISTOR
IC258,259,802,892 POWER TRANSISTOR

7

8 9 10 11 12

Figure 29 SCHEMATIC DIAGRAM (2/4)

– 29 –

MD-MT180

SUB PWB-B

A

B

CK14

C

D

E

D2

1SS385

C2

0.1

1413121110 9 8

QH

VCC

IC1

A

1234 1234

R1

10K

Q

CK

QF

QE

QG

GND

QDQCQBQAB

567

74VHC164FT

CK16

D1

1SS385

CK13

10K

R2

8765

CL

PR

VCC

QDCK

C1

100P
(CH)

C3

0.1

QGND

CK13A

IC2

TC7W74FK

CKG

CKV

+B

TP771

AUDATA

AUSCLK

RCAULT

TP772

INPGCK
INPGIN

MCPGIN

TP412

2.2K

R757

C760

PBMUTE

BEEP

MAIN PWB VERSION ,

R754
150K

C758

1

R762

R761

150K

101112

R758

0.1

100

AURESET

9

HP

BIAS

BEEP

AMPuGAIN SEL.

RHPVCC

LOGIC

AMPuGAIN SEL.

13 14 15 16 17 18 19 20 21 22 23 24

LAT

DAT

CLK

PBAULT

+B

100K

8

7

RHPVEE

LHPVEE

LHPVCC

R719

6.8K

101112

9

LOUT

ROUT

RIHP

IC701

IR3R54N

C762

2.2

6

5

C753

1

4321

RLPFO

RIN

LLPFO

LIN

DGND

13 14 15 16 17 18 19 20 21 22 23 24

AUDIO AMP.

R702

22

C702

10/6.3

C754

1

R–

R+

ATT

LPF

LPF

ATT

L+

C492

L–

R766

2.2

C761

L-CH
R-CH

R765

15

C766C765

0.220.22

B C

MAIN PWB-A

R720

R712

6.8K

8

LIHP

1

15

R767

R768

4.7

6.8K

VEE

D495

4.7

0.1

C734

6

5

7

LI

RI

AGND

VCC

R703

100K

C701

10/6.3

R701

IC703

IR3R59N

AUDIO AMP.

MA8075M

D496

MA8075M

R711

6.8K

4321

C703

100

0.01

DSPDAT

DSPSTB

DSPSCK

10111213141516171819202122232425

SYD3

26

SYD4

27

SYD5

28

SYD6

29

SYD7

F

R422

100K

G

RCAULT
MCPGIN
INPGIN
INPGCK

TP416
TP417

OPICGA
PBMUTE
PBAULT
LDON
DISC
SGAIN

AUSCLK

AUDATA

30

VSS

31

RCLAT

32

MCPGI

33

INPGI

34

INPGCK

35

RCPCNT

36

TEST1

37

TEST0

38

JPNP

39

VCC

40

OPICGA

41

PBOPON

42

PBLAT

43

LDON

44

DISCP

45

SGAIN

46

RACLK

47
48
49
50

+B

PE4

VSS

EPRT

SYRS

SYRD

SYWR

SYD0

23
24

SYD1

25

SYD2

IX0484AW

SYSTEM

MICROCOMPUTER

48

RADAT

49

VSS

50

DLBHP

EMPH0

DCEXT

DHLAT

SLCNT3

SLCNT2

SLCNT1

BUZOUT

MD0

EMPH0

BEEP

MD1

51 5253545556 57 58 59 60 61 62 63 64 65 6667686970 71 72 73 74 75

EEPK

EPCS

EEPD

IC401

RESET

WDT0VF

MD2

CK403

SCK0

DSPSTB

DSPSCK

1
2
3

78
77
76

XTAL

NMI

µSTBY

VCC

XL401

4.19MHz

AURESET

9

DSPDAT

EXTAL

H

• NOTES ON SCHEMATIC DIAGRAM can be found on page 26.

1

23456

Figure 30 SCHEMATIC DIAGRAM (3/4)

8

6

7

VSS

RMDAT

CIN
SPIN
RFPCNT

Vref
AVCC
ARQK

PLAY

VSS

TP400

DISCPR

4321

5

SPWDS

DISCPR

LCDRST

CKSTP

SENSE
DCNT1
PLVON

MCMON

CHGON

LDVAR

CHGCNT

HKEY2
HKEY1

CHIMON

PLVBAT

STOP

REC

PF4

SPIN

CIN

PCNT1
PCNT2

VCC

EJSW
XRST

FOK

VSS

AVSS

RKEY
TEMP

DINT

ARQD

RPLAY

– 30 –

100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76

RPLAY

TP402

R402

100K

R405

10K

TP401

R423

TP415

22K

C401

0.1

R425

RKEY

DINT

22K

3
2

TP406

R406
10K
CK405

LDVAR

TEMP

22K

R424

4

1

XRT
FOK
SENSE

EJECT

SW401

PCNT1
PCNT2

PLVON
CHGON

CHGCNT

HKEY2
HKEY1

C130

0.1

PLVBAT

+B

D2

1SS385

C2

0.1

1413121110 9 8

QH

VCC

IC1

A

1234 1234

R1

10K

Q

CK

QF

QE

QG

GND

QDQCQBQAB

567

74VHC164FT

D1

1SS385

R2
10K

8765

PR

VCC

C1

100P
(CH)

C3

0.1

QGND

CL

QDCK

IC2

TC7W74FK

MD-MT180

MAIN PWB VERSION

MAIN PWB-A

X

R422

100K

RCAULT
MCPGIN
INPGIN
INPGCK

TP416
TP417

OPICGA
PBMUTE
PBAULT
LDON
DISC
SGAIN

AUSCLK

AUDATA

DSPSTB

DSPSCK

SYD3

26

SYD4

27

SYD5

28

SYD6

29

SYD7

30

VSS

31

RCLAT

32

MCPGI

33

INPGI

34

INPGCK

35

RCPCNT

36

TEST1

37

TEST0

38

JPNP

39

VCC

40

OPICGA

41

PBOPON

42

PBLAT

43

LDON

44

DISCP

45

SGAIN

46

RACLK

47
48
49
50

+B

PE4

VSS

SCK0

EPRT

EEPK

SYRS

EPCS

EEPD

SYRD

SYWR

SYD0

23
24

SYD1

25

SYD2

MICROCOMPUTER

48

RADAT

49

VSS

50

DLBHP

EMPH0

DHLAT

SLCNT3

SLCNT2

SLCNT1

BUZOUT

MD0

EMPH0

BEEP

MD1

51 5253545556 57 58 59 60 61 62 63 64 65 6667686970 71 72 73 74 75

DSPSTB

DSPSCK

IC401

IX0484AW

SYSTEM

DCEXT

NMI

RESET

WDT0VF

MD2

µSTBY

VCC

CK403

XL401

4.19MHz

DSPDAT

10111213141516171819202122232425

9

1
2
3

78
77
76

XTAL

8

7

VSS

RMDAT

DSPDAT

CIN
SPIN
RFPCNT

Vref
AVCC
ARQK

PLAY

EXTAL

VSS

TP400

6

5

SPWDS

LCDRST

MCMON

CHGCNT

CHIMON

PLVBAT

STOP

REC

DISCPR

SPIN

4321

PCNT1
PCNT2

VCC

EJSW

DISCPR

CKSTP

XRST

FOK

SENSE

DCNT1

PLVON

CHGON

VSS

AVSS

LDVAR
HKEY2

HKEY1

RKEY
TEMP

PF4

DINT

+B

CIN

RPLAY

ARQD

TP402

RPLAY

TP771

AUSCLK

RCAULT

100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76

R402

100K

TP772

AUDATA

R405

10K

TP415

TP401

C401

R425

RKEY
DINT

22K

R423

0.1

22K

INPGCK
INPGIN

MCPGIN

TP412

R757

PBMUTE

3
2

TP406

R406
10K
CK405

LDVAR

TEMP

22K

R424

R754
150K

C758

R761

150K

100

R758

2.2K

0.1

C760

BEEP

4

1

XRT
FOK
SENSE

101112

HP

BIAS

BEEP

LOGIC

13 14 15 16 17 18 19 20 21 22 23 24

LAT

DAT

CLK

AURESET

PBAULT

EJECT

SW401

PCNT1
PCNT2

PLVON
CHGON

CHGCNT

HKEY2
HKEY1

C130

0.1

PLVBAT

+B

+B

1

R762

100K
8

9

6

7

RHPVEE

AMPuGAIN SEL.

RHPVCC

AMPuGAIN SEL.

LHPVEE

LHPVCC

R720

6.8K

R719

6.8K

101112

8

9

LIHP

LOUT

ROUT

RIHP

IC701

IR3R54N

C762

2.2

4321

5

RLPFO

RIN

LLPFO

LIN

C753

1

DGND

13 14 15 16 17 18 19 20 21 22 23 24

AUDIO AMP.

R702

22

C702

10/6.3

C754

1

R–

R+

ATT

LPF

LPF

ATT

C761

R765

15

1

L+

C492

L–

15

R767

R766

2.2

4.7

L-CH
R-CH

R768

4.7

C766C765

0.220.22

6

7

RI

AGND

VCC

VEE

C701

IC703

IR3R59N

D495

MA8075M

C734
5

LI

R703
100K

10/6.3

D496

MA8075M

R712

6.8K
R711

6.8K

0.1
4321

0.01

C703

100

R701

AUDIO AMP.

AURESET

7

8 9 10 11 12

Figure 31 SCHEMATIC DIAGRAM (4/4)

– 31 –

MD-MT180

A

MAIN PWB VERSION B X0021AWZZ

SUB PWB-B is added to this version PWB.
SUB PWB-B is shown in page 36,37.

TP707

TP455

TP458

C212

TP408

606570

12

TP453

C853

20

55

TP207

OPTICAL/LINE-INHEADPHONES

C840

L860

TP806

C205

J701

TP459

TP602

45

40

35

C202

TP409

51

50

25

R856

TP401

TP205

R206

TP460

TP659

30

26

TP658

R205

TP206

R857

TP656

D842

C860

TP651

TP655

L202

TP701

TP801

TP657

TP661

TP212

TP119

TP703

TP706

TP805

C856

R855

R844

C201

TP122

C857

C837

C845

TP653

TP652

1

R854

R832

C850

TP120

12

C839

R831

R853

C848

C847

C842

C843

C841

5

10

TP804

TP860

C830

5

IC852

8

4

5

C846

R850

TP841

IC202

Q801

TP610

1

3

IC873

1

D843

TP351

TP660

IC841

45

TP842

F841

0.4A,DC60V

TP802

4

TP654

C836

13

D841

20

15

24

TP803

13

TP402

L841

TP121

J801
DC-IN

5V

2

15

J703A

SW403

LID OPEN

B

TP725

TP722

TP724

SW601

DISC PROTECT

TP726

TP665

C

TP5

TP7

C773

3

1

IC771

C774

4

5

D

TP456

TP412

TP441

TP6

TP462

TP772

TP500

C821

TP723

TP721

TP484

R892

TP727

TP771

TP483

C862

D861

1

TP400

SW401

E

F

G

EJECT

10

11

TP406

IC902

TP111

9

TP116

2

3

1

TP115

TP114

TP131

TP133

TP132

TP108

L821

R891

TP107

D862

TP202

TP106
TP130

TP410

R204

TP482

C204

TP102

TP201

TP144

TP711

TP729

TP485

C863

TP415

TP101

TP417

TP416

TP117

TP481

TP210

TP209

76

C203

D821

D851

TP452

100

TP118

TP713

Q851

TP407

75

80

85

90

95

1

C209

TP411

TP204

TP208

TP171

TP105

C207

L851

5

TP714

TP110

TP457

TP451

C851

Q821

TP461

XL201

C211

10 15

TP705

TP704

TP712

TP702

TP708

TP487

C852

TP454

R222

IC201

TP103

MAIN PWB-A (BOTTOM VIEW)

: Through-hole where the top, bottom and +B patterns are connected.
: Through-hole where the top, bottom and ground patterns are connected.

H

: Through-hole where the top and bottom patterns are connected.

• The numbers 1 to 15 are waveform numbers shown in page 44.

1

23456

Figure 32 WIRING SIDE OF P.W.BOARD (1/11)

– 32 –

MAIN PWB VERSION B X0021AWZZ

SUB PWB-B is added to this version PWB.
SUB PWB-B is shown in page 36,37.

D802

J801
DC-IN

5V

R803

R802

R809

L802

(–)

CHASSIS

GND

CHARGING TERMINAL(226)

KEY SWITCH
FLEXIBLE PWB
(228)

MECHANISM
FLEXIBLE PWB
(19)

LCD UNIT(229)

C354

(+)

CHARGING TERMINAL(226)

D351

3

L602 L604 L603L601

C620

13

C621

R603

L605

R808

1

7

C613

R602

Q891

R807

17

32

C608

C605

IC353

3
1

C602

R604

R810

R811

R813

C353

5

IC351

C601

16

20

25

30

33

R815

R814

IC802

3

4

C351

C604

15

35

R611

4
6

R806

D803

C802

CN601

IC354

1

2

10

3

1

6

10

IC601

R610

L801

1

Q803

D801

R816

1
2

2

R812

3

IC801

3

14

8

C603

40

CHASSIS

GND

2

5

L800

Q901

5

R257

4

1

4

R920

CK224

45

CK805

IC803

3

C801

R460

C361

D651

OPTICAL/LINE-IN

1

R713

3

C713

C712

Q711

7

R462

C716

Q461

1

11

5

C357

IC651

6

TP203

CK222

1

1

64

60

55

49

48

CK200

C612

J701

1

L171

C172

100

26

CK204

5

10

15

20

24

1

CK211

C171

C733

R101
R102

C703

C734

CP6

CN482

95

30

R137

C100

IC701

R719

C122

L100

R703

5

IC401

35

C401

5

R714

L703

R715

R716

CK201

C715

R718

8

R717

PS801

1.1A

CN451

R361

C652

1

TP411A

10

122

C619

C618

C617

R605

C615

C611

L704

4

C714

2

L702

9

C711

R712

R711

R728A

CP5

R458

1

R451
R452

12

CK405

CK206

IC871

1

5

R871

4

3

1

4

IC402

5

CK225

L101

OPTICAL
PICKUP (1)

R413
R415

R414
R416

R411

8

R412

CK208

CK209

CK210

R161

C165

CN101

C876

R456

R457

R453

CK207

25

C701

CK205

90

R422

R136

R135

R138

C121

R140
C133
R139

C113

C702

R720

CP7

1

7

40

13

24

TP201A

C130

1520

10

C482
C481

R481

R424

85

CK102

R134

12

15

25

C132

20

13

12

45

10

R702

R482

R425

80

R133

IC101

30

R483

R423

R701

C771

5

C869

55

R131

R467

R466

76

70

65

60

50

35

D467

C103

R132

45

40

L453

51

C102

1

36

J703A

HEADHONES

3

4

L454

CK418

R465

R463

D461

R402

75

CK403

D431

C431

R431

R405

C112

R111

48

R112

C110

37

C108

C131

CK139

L452

R461

4
1

C114

C107

C106

1

2

R406

XL401

2

C111

C109

C492

R754

3

R271

R272

CK100

CK108

C758

R266

R267

R270

1

1

BATTERY TERMINAL (227)

(–)

C766

R768

R767

1

D496

D495

C760

R502

R269

IC431

3

IC256

85

IC251

R762

R761

C502

C865

R758

C501

R262

R250

1

64

4

R757

12

C510

R501

C551

4

IC255

C254

58

C255

R252

6

1

R293

Q250

C864

C509

1

C221

R261

4

4
3

5

10

C511

8

1

R253

3

2

R256

Q251

MD-MT180

SW403
LID OPEN

32

C454

R464

R404

R766

C765

R765

R403

24

IC703

20

15

13

C761

C762

C503

IC501

L204

CK809

R254

1
3

(+)

BATTERY TERMINAL (211)

R207

C253

3

4

R286

R281

CK202

16

15

10

9

1

2

3

4

R255

C252

6

D251

D281

4

1

C259

R285

6

6

1

4

3

R287

Q257

6

1

4

3

R282

6

1

4

3

IC253

4

C753

C754

CK203

R288

IC258

IC260

SW401
EJECT

4

6
8
7

5

MAIN PWB-A (TOP VIEW)

7

8 9 10 11 12

Figure 33 WIRING SIDE OF P.W.BOARD (2/11)

– 33 –

14

R819

C291

R291

IC892

R818

IC257

R296

C818

R292

R295

C251

IC259

R251

R294

IC809

R277

R284

R283

R279

MD-MT180

A

MAIN PWB VERSION C X0021AWZZ

SUB PWB-B is added to this version PWB.
SUB PWB-B is shown in page 36,37.

TP707

TP455

TP458

C212

606570

12

TP408

TP453

C853

20

OPTICAL/LINE-INHEADPHONES

C840

L860

55

TP207

TP806

C205

J701

TP459

TP602

45

40

35

C202

TP409

51

50

25

R856

TP401

TP205

R206

TP460

TP659

30

26

TP658

R205

TP206

R857

TP656

D842

C860

TP651

TP655

L202

TP701

TP801

TP657

TP661

TP212

TP119

TP703

TP706

TP805

C856

R855

R844

C201

TP122

C857

C837

C845

TP653

TP652

1

R832

C850

TP120

12

R854

C839

R831

R853

C848

C847

C842

C843

C841

5

10

TP804

TP860

C830

5

IC852

8

4

5

C846

R850

TP841

IC202

Q801

TP610

1

3

IC873

1

D843

TP351

TP660

IC841

45

TP842

F841

0.4A,DC60V

TP802

4

TP654

C836

13

D841

20

15

24

TP803

13

TP402

L841

TP121

J801
DC-IN

5V

2

15

J703A

SW403

LID OPEN

B

TP725

TP724

TP722

IC771

3

C773

4

TP5

TP7

1

C774

5

TP726

TP665

SW601

DISC PROTECT

C

D

TP456

TP412

TP441

TP6

TP462

TP772

TP500

C821

TP723

TP721

TP484

R892

TP727

TP771

TP483

C862

D861

1

TP400

SW401

E

F

EJECT

TP406

IC902

3

TP111

TP133

TP116

2

1

TP115

TP114

TP131

TP132

TP108

L821

R891

TP107

D862

TP202

TP106
TP130

TP410

R204

TP482

C204

TP102

TP201

TP144

TP711

TP729

TP485

C863

TP415

TP101

TP417

TP416

TP117

TP481

TP210

TP209

76

C203

D821

D851

TP452

100

TP118

TP713

Q851

TP407

75

80

85

90

95

1

C209

TP411

TP204

TP208

TP171

TP105

C207

L851

TP714

5

TP457

C851

Q821

TP110

TP704

TP712

TP451

TP461

XL201

C211

R222

IC201

10 15

TP705

TP702

TP708

TP487

C852

TP454

TP103

9

G

10

11

MAIN PWB-A (BOTTOM VIEW)

: Through-hole where the top, bottom and +B patterns are connected.
: Through-hole where the top, bottom and ground patterns are connected.

H

: Through-hole where the top and bottom patterns are connected.

• The numbers 1 to 15 are waveform numbers shown in page 44.

1

23456

Figure 34 WIRING SIDE OF P.W.BOARD (3/11)

– 34 –

MAIN PWB VERSION C X0021AWZZ

SUB PWB-B is added to this version PWB.
SUB PWB-B is shown in page 36,37.

D802
J801
DC-IN

5V

R803

R802

R809

L802

(–)

CHASSIS

GND

CHARGING TERMINAL(226)

KEY SWITCH
FLEXIBLE PWB
(228)

MECHANISM
FLEXIBLE PWB
(19)

LCD UNIT(229)

C354

(+)

CHARGING TERMINAL(226)

D351

3

L602 L604 L603L601

C620

13

C621

R603

L605

R808

1

7

C613

R602

Q891

R807

17

32

C608

C605

IC353

3
1

C602

R604

R810

R811

R813

C353

5

IC351

C601

16

20

25

30

33

R815

R814

IC802

3

4

C351

C604

15

35
R611

4
6

R806

D803

C802

CN601

IC354

1

2

10

3

1

6

10

IC601

R610

L801

1

Q803

D801

R816

1
2

2

R812
3

IC801

3

14

8

C603

40

CHASSIS

GND

2

5

L800

Q901

5

R257

4

1

4

R920

CK224

45

CK805

IC803

3

C801

R460

C361

D651

OPTICAL/LINE-IN

1

R713

3

C713

C712

Q711

7

R462

C716

Q461

1

11

5

C357

IC651

6

TP203

CK222

1

1

64

60

55

49

48

CK200

C612

J701

1

L171

C172

100

26

CK204

5

10

15

20

24

1

CK211

C171

C733

R101
R102

C703

C734

CP6

CN482

95

30

R137

C100

IC701

R719

C122

L100

R703

5

IC401

35

C401

5

R714

L703

R715

R716

CK201

C715

R718

8

R717

PS801

1.1A

CN451

R361

C652

1

TP411A

10

122

C619

C618

C617

R605

C615

C611

L704

4

C714

2

L702

9

C711

R712

R711

R728A

CP5

R458

1

R451
R452

12

CK405

CK206

IC871

1

5

R871

4

3

1

4

IC402

5

CK225

L101

OPTICAL
PICKUP (1)

R413
R415

R414

R416

R411

8

R412

CK208

CK209

CK210

R161

C165

CN101

C876

R456

R457

R453

CK207
25

C701

CK205

90

R422

R136

R135

R138

C121

R140
C133
R139

C113

C702

R720

CP7

1

7

40

13

24

TP201A

C130

1520

10

C482
C481

R481

R424

85

CK102

R134

12

15

25

C132

20

13

12

45

10

R702

R482

R425

80

R133

IC101

30

R483

R423

R701

C771

5

C869

55

R131

R467

76

70

65

60

50

35

D467

R466

C103
R132

45

40

L453

51

C102

1

36

J703A

HEADHONES

3

4

L454

CK418

R465

R463

D461

R402

75

CK403

D431

C431

R431

R405

C112

R111

48

R112

C110

37

C108

C131

CK139

L452

R461

4
1

C114

C107

C106

1

2

R406

XL401

2

C111

C109

R754

3

R271

R272

CK108

C492

C758

R267

R270

CK100

1

1

BATTERY TERMINAL (227)

(–)

C766

R768

R767

1

D496

D495

C760

R502

R269

IC431

R266

3

IC256

85

IC251

R762

R761

C502

C865

R758

C510

C501

R262

R250

1

64

4

R757

12

R501

C551

4

IC255

C254

58

C255

R252

6

1

R293

Q250

C864

C509

1

C221

R261

4

4
3

5

10

C511

8

1

R253

3

2

R256

Q251

MD-MT180

SW403
LID OPEN

32

C454

R464

R404

R766

C765

R765

R403

24

IC703

20

15

13

C761

C762

C503

IC501

L204

CK809

R254

1
3

(+)

BATTERY TERMINAL (211)

R207

C253

3

4

R286

R281

CK202

16

15

10

9

1

2

3

4

R255

C252

6

D251

4

D281

1

C259

R285

6

6

1

4

3

R287

Q257

6

1

4

3

R282

6

1

4

3

IC253

4

C753

C754

CK203

R288

IC258

IC260

SW401
EJECT

4

6
8
7

5

MAIN PWB-A (TOP VIEW)

7

8 9 10 11 12

Figure 35 WIRING SIDE OF P.W.BOARD (4/11)

– 35 –

14

R819

C291

R291

IC892

R818

IC257

R296

C818

R292

R295

C251

IC259

R251

R294

IC809

R277

R284

R283

R279

MD-MT180

o

A

MAIN PWB VE

SUB PWB-B is added t

B

SW403
LID OPEN

1

13

1520

C

10

5

6

12

CP7

1

CK418

1

5

IC703

10

12

D

7

CK205

76

85

80

90

E

F

IC401

35

40

45

CK102

12

13

10

15

IC101

20

25

24

TP201A

75

70

65

60

55

51

50

1

5

45

40

35

30

36

CK403

48

37

CK139

XL401

4

3

1

2

3

85

CK100

IC251

CK108

1

1

64

4

4

IC255

58

4

1

4

6

3

1

8

IC501

CK809

1

1
3

3

3

4

2

G

C113

100

4

32

24

20

15

13

CK202

16

15

CK203

10

9

1

2

3

6
4

1

6

1
3

1
3

1
3

SW401
EJECT

4

6
4

6
4

6
4

IC703

13

15

14

TP665

TP726

T

MAIN PWB-A (TOP VIEW)

X0021AWZZ B :P33

H

1

X0021AWZZ C :P35

23456

Figure 36 WIRING SIDE OF P.W.BOARD (5/11)

– 36 –

MD-MT180

SUB PWB-B

MAIN PWB VERSION B , C

SUB PWB-B is added to this version PWB.

TP456

TP441

TP5

TP7

5

TP412

3

TP111

1

TP6

TP133

TP772

TP462

TP500

2

1

TP723

TP721

TP484

TP114

TP132

TP108

TP665

TP726

TP725

TP722

TP724

3

4

TP400

TP406

TP727

TP483

TP115

TP771

TP116

TP131

C2

L821

TP107

14

1

TP202

TP106

TP130

TP410

IC1

TP729

TP482

TP485

TP415

TP101

TP201

TP144

10

5

TP102

TP117

TP711

TP417

TP416

8

7

TP209

76

CKV

D1

D2

R1

TP452

TP118

C1

TP481

TP210

100

CK14

TP713

TP407

75

80

85

90

95

1

CK13

R2

CK16

TP411

TP204

TP208

TP171

TP105

1

L851

5

C3

CK13A

8

IC2

CKG

TP714

TP110

5

4

TP704

TP712

TP457

TP451

TP454

TP461

XL201

IC201

10 15

TP705

TP708

TP487

TP702

TP103

TP707

TP455

TP458

TP408

606570

TP453

C853

55

20

C840

TP207

TP806

TP459

TP602

TP409

51
50

45

40

35

25

TP401

TP205

TP460

30

26

TP658

TP206

TP656

TP659

TP651

TP655

TP801

TP657

TP661

TP212

TP119

TP701

TP703

TP706

TP805

TP122

TP653

TP652

1

TP120

12

TP860

5

8

5

5

10

TP804

3

4

1

TP660

IC841

45

TP842

TP841

IC202

TP802

TP610

4

1

TP654

TP351

13

TP803

TP402

24

TP121

20

15

13

MAIN PWB-A (BOTTOM VIEW)

X0021AWZZ B :P32
X0021AWZZ C :P34

7

8 9 10 11 12

Figure 37 WIRING SIDE OF P.W.BOARD (6/11)

– 37 –

MD-MT180

A

B

C

D

E

F

MAIN PWB VERSION X X0035AWZZ

J703A

SW403

LID OPEN

TP727

TP5

5

TP7

1

TP412

C774

TP6

TP772

TP462

TP500

C821

TP723

TP721

TP484

R892

D861

TP771

TP483

L821

C862

R891

SW601

DISC PROTECT

TP665

TP726

TP725

TP722

TP724

C773

3

IC771

4

TP456

TP441

1

SW401
EJECT

TP400

5

TP406

IC902

1

4

1

IC2

7

8

C3

C1

2

3

1

TP111

TP133

5

R2

TP114

IC1

D2

TP132

TP115

TP108

C2

10

D1

TP116

TP107

TP131

8

R1

TP106
TP130

TP410

D862

14

R204

TP202

TP201

TP482

C204

TP102

TP144

TP711

TP729

TP485

C863

TP415

TP101

TP417

TP416

TP117

TP210

TP209

C203

D821

D851

TP481

TP452

76

100

TP118

TP713

Q851

TP407

75

80

85

90

95

1

C209

TP411

TP208

TP171

TP105

C207

TP714

L851

TP204

5

Q821

TP110

TP704

TP712

TP457

TP451

C851

TP461

XL201

C211

R222

IC201

10 15

TP487

TP454

TP705

TP702

TP708

TP707

C852

606570

TP103

TP455

TP458

C212

TP408

12

TP453

C853

20

OPTICAL/LINE-INHEADPHONES

C840

L860

55

TP207

TP806

C205

J701

TP459

TP602

45

40

35

C202

TP409

51
50

25

R856

TP401

TP205

R206

TP460

TP659

30

26

TP658

R205

TP206

R857

TP656

D842

C860

TP212

TP651

TP655

TP119

L202

TP801

TP657

TP661

TP701

TP703

TP706

TP805

R844

C201

TP122

C857

C856

R855

C837

C845

TP653

TP652

1

C850

TP120

12

R854

R832
C839

R831

R853

C848

C847

C842

C843

C841

5

10

TP804

TP860

C830

5

IC852

8

4

5

C846

R850

TP841

IC202

Q801

TP610

1

3

IC873

1

D843

TP351

TP660

IC841

45

TP842

F841

0.4A,DC60V

TP802

4

TP654

C836

13

D841

24

20

15

TP803

13

TP402

L841

TP121

J801

DC-IN
5V

15

2

9

10

11

G

MAIN PWB-A (BOTTOM VIEW)

: Through-hole where the top, bottom and +B patterns are connected.
: Through-hole where the top, bottom and ground patterns are connected.

H

: Through-hole where the top and bottom patterns are connected.

• The numbers 1 to 15 are waveform numbers shown in page 44.

1

23456

Figure 38 WIRING SIDE OF P.W.BOARD (7/11)

– 38 –

MAIN PWB VERSION X X0035AWZZ

D802

J801

DC-IN
5V

R803

R802

R809

L802

(–)

CHASSIS

GND

CHARGING TERMINAL(226)

KEY SWITCH
FLEXIBLE PWB
(228)

MECHANISM
FLEXIBLE PWB
(19)

LCD UNIT(229)

C354

(+)

C866

CHARGING TERMINAL(226)

D351

C867

3

L602 L604 L603L601

C620

13

C621

R603

L605

1

7

C613

R602

R808

Q891

17

32

C608

R807

3
1

C602

R604

C605

R810

R811

R813

C353

IC353

5

IC351

C601

16

20

25

30

33

R815

R814

IC802

3

4

4
6

C351

C604

15

35
R611

R806

D803

C802

CN601

IC354

1

2

10

3

1

6

10

IC601

R610

L801

1

2

Q803

D801

R816

1
2

2

R812
3

IC801

5

3

14

8

C603

40

CHASSIS

GND

L800

Q901

5

R257

4

1

4

R920

CK224

45

CK805

IC803

3

C801

R460

C361

D651

60

55

48

OPTICAL/LINE-IN

1

R713

3

C713

C712

Q711

7

R462

C716

Q461

1

11

5

C357

IC651

6

TP203

CK222

1

1

64

49

CK200

C612

J701

C703

24

1

C733

CK211

R101
R102

C171

C734

CP6

95

30

R137

IC701

R719

CN482

L100

C100

C701

R703

5

IC401

35

C401

C122

5

R714

L703

R715

R716

CK201

C715

R718

8

PS801

1.1A

CN451

R361

C652

1

TP411A

10

122

C619

C618

C617

R605

C615

C611

L704

4

C714

2

L702

9

C711

R717

R712

R711

R728A

1

12

CK205

CK204

IC871

1

5

R871

4

3

1

4

IC402

R411

5

8

R412

CK208

CK225

CK209

CK210

L101

C165

CN101

OPTICAL
PICKUP (1)

CP5

R456

R458
R457

R452

R453

CK206

C876

R413
R415

R414
R416

R161

1

CK207
25

L171

C172

R451

CK405

100

5

10

15

20

26

90

R136

R422

R135

R138

C121

R140
C133
R139

C113

R720

1

7

13

24

TP201A

CP7

C130

C702

1520

10

C482
C481

R481

R424

85

40

CK102

12

15

C132

R134

25

20

13

12

45

10

R702

R482

R425

R133

IC101

30

R483

R423

80

R701

C771

55

5

C869

70

65

60

R131

R467

R466

76

50

R132

35

D467

C103

45

40

J703A

HEADHONES

3

L453

4

CK418

R463

D461

R402

75

CK403

C431

R431

51

C102
1

48

37

36

CK139

L454

R465

R405

C112

R111

D431

C110

C131

R112

C108

L452

R461

4

C114

1

1

R406

C107

C106

2

C111

C109

R754

XL401

3

2

R271

C492

C758

R272

CK100

CK108

1

BATTERY TERMINAL (227)

(–)

C766

R768

R767

1

D496

D495

C760

R502

R269

IC431

R266

R267
R270

3

IC256

85

IC251

1

R762

R761

C502

C865

R758

C501

R262

R250

1

64

4

R757
12

C510

R501

C551

4

IC255

C254

58

C255

R252

6

1

R293

Q250

C864

C509

1

C511

C221

R261

4

4
3

5

10

8

1

R253

3

2

R256

Q251

MD-MT180

SW403
LID OPEN

32

C454

R464

R404

R766

C765

R765

R403

24

IC703

20

15

13

C761

C762

C503

IC501

CK202

16

15

10

9

R207

L204

CK809

R254

1
3

(+)

BATTERY TERMINAL (211)

3

4

R286

C253

R281

1

2

3

4

R255

C252

6

D251

4

1

C259

R285

6

6

1

4

3

Q257

6

1

4

3

R282

6

1

4

3

IC253

4

D281

R287

C753

C754

CK203

R288

IC258

IC260

SW401
EJECT

4

6
8
7

5

MAIN PWB-A (TOP VIEW)

7

8 9 10 11 12

Figure 39 WIRING SIDE OF P.W.BOARD (8/11)

– 39 –

14

R819

C291

R291

IC892

R818

IC257

R296

C818

R292

R295

C251

IC259

R251

R294

IC809

R277

R283

R279

R284

MD-MT180

A

B

C

D

E

F

MAIN PWB VERSION D X0021AWZZ

J703A

SW403

LID OPEN

TP727

TP5

TP7

5

TP412

1

C774

TP6

TP462

TP772

TP500

C821

TP723

TP721

TP484

R892

D861

TP771

TP483

L821

C862

R891

SW601

DISC PROTECT

TP665

TP726

TP725

TP722

TP724

C773

3

IC771

4

TP456

TP441

1

TP400

SW401
EJECT

TP406

IC902

3

TP111

TP133

TP116

2

TP114

TP132

TP115

TP108

TP107

TP131

1

TP202

TP106
TP130

TP410

D862

R204

TP482

C204

TP102

TP201

TP144

TP711

TP729

TP485

C863

TP415

TP101

TP417

TP416

TP117

TP210

TP209

C203

D821

D851

TP481

TP452

76

TP118

J701

OPTICAL/LINE-INHEADPHONES

TP705

TP704

TP712

TP702

TP708

TP714

TP110

TP457

TP451

C851

Q821

TP461

XL201

C211

10 15

TP487

TP454

R222

IC201

TP707

C852

606570

TP103

TP455

TP458

C212

TP408

12

TP453

C853

20

C840

L860

55

TP207

TP806

TP459

TP602

C205

TP713

Q851

L851

TP407

TP411

TP204

TP208

75

80

85

90

95

100

1

5

C207

C209

TP171

TP105

TP409

50

45

40

35

25

C202

51

R856

TP401

TP205

R206

TP460

TP659

30

26

TP658

R205

TP206

R857

TP656

D842

C860

TP651

TP655

L202

TP801

TP657

TP661

TP212

TP119

TP701

TP703

TP706

TP805

R844

TP122

C856

R855

C837

C201

TP653

TP652

C857

C845

1

C850

TP120

12

R854

R832
C839

R853

5

R831

5

C848

C847

C842

C843

C841

5

10

TP804

TP860

C830

IC852

8

4

TP660

C846

R850

TP842

TP841

IC202

TP802

Q801

TP610

4

1

3

TP654

IC873

1

C836

D843

TP351

13

TP803

IC841

45

D841

F841

0.4A,DC60V

24

20

15

13

TP402

L841

TP121

J801
DC-IN

5V

2

15

9

10

11

G

MAIN PWB-A (BOTTOM VIEW)

: Through-hole where the top, bottom and +B patterns are connected.
: Through-hole where the top, bottom and ground patterns are connected.

H

: Through-hole where the top and bottom patterns are connected.

• The numbers 1 to 15 are waveform numbers shown in page 44.

1

23456

Figure 40 WIRING SIDE OF P.W.BOARD (9/11)

– 40 –

MAIN PWB VERSION D X0021AWZZ

J701

OPTICAL/LINE-IN

R806

D803

IC802

3

4

C802

CN601

4
6

IC354

1

2

10

C604

35
R611

3

1

6

10

IC601

R610

L801

1

2

Q803

D801

R816

1
2

2

R812
3

IC801

5

3

14

8

C603

40

CHASSIS

GND

L800

Q901

5

R257

4

1

4

R920

CK224

45

CK805

IC803

3

C801

R460

C361

D651

60

55

48

C712

C357

6

1

1

Q461

5

TP203

1

R713

3

C713

Q711

R462

1

11

IC651

CK222

64

49

CK200

C612

5

R714

L703

R715

R716

CK201

C715

R718

7

8

R717

PS801

1.1A

C716

CN451

R361

C652

1

TP411A

10

122

C619

C618

C617

R605

C615

C611

L704

4

C714

2

L702

9

C711

R712

R728A

1

CK205

CK204

IC871

1

5

R871

4

3

1

4

IC402

R411

5

8

R412

CK208

CK225

CK209

L101

C165

CN101

OPTICAL
PICKUP (1)

D802
J801
DC-IN

5V

R803

R802

R809

L802

(–)

CHASSIS

GND
CHARGING TERMINAL(226)

KEY SWITCH
FLEXIBLE PWB
(228)

MECHANISM
FLEXIBLE PWB
(19)

LCD UNIT(229)

C354

(+)

C866

CHARGING TERMINAL(226)

D351

C867

7

3

L602 L604 L603L601

C620

13

C621

R603

L605

R808

1

C613

R602

Q891

R807

17

32

C608

C605

C353

IC353

3
1

5

C602

R604

R810

R811

R814

R813

C351

IC351

C601

16

15

20

25

30

33

R815

R711

CP5

12

CK206

R413
R415

R414

R416

CK210

R161

R456

R458

R457

R452

R453

C876

1

CK207
25

L171

C172

R451

CK405

100

26

MD-MT180

J703A

HEADHONES

SW403

C703

C701

R702

R701

C702

R703

24

1

C734

C733

CP6

5

10

15

20

30

CK211

R137

R101

R102

C171

CN482

95

L100

C100

IC701

5

R719

90

IC401

35

C401

R136

C122

1

7

R422

R135

R138

C121

R140
C133
R139

C113

R720

CP7

13

24

TP201A

C130

1520

10

C482
C481

R481

R424

85

40

CK102

12

15

25

C132

R134

10

20

13

12

R482

45

R133

IC101

R425

80

30

R483

R423

C771

5

55

C869

70

65

60

R131

76

50

R467

R466

C103
R132

35

D467

45

40

L453

51

C102

1

36

R402

3

4

CK418

R463

75

C431

R465

D461

CK403

R431

R405

C112

R111

48

37

CK139

L454

D431

C110

C131

R112

C108

L452

R461

4

1

C114

1

2

R406

C107

C106

XL401

2

C111

C109

R754

3

R271

C492

C758

R267
R270

R272

CK100

CK108

1

1

BATTERY TERMINAL (227)

(–)

C766

R768

R767

1

D496

D495

C760

R502

R269

IC431

R266

3

IC256

85

IC251

R761

C502

C865

R762

R758

C501

R262

R250

1

64

C510

C254

C255

1

4

C864

R757

12

C509

R501

C511

C221

C551

R261

4

IC255

58

R253

R252

4

1

4

6

3

R293

Q250

5

10

8

1

3
2

Q251

LID OPEN

32

C454

R404

R766

C765

R765

R403

24

IC703

20

15

13

C761

C762

C503

IC501

CK202

16

15

10

9

R207

L204

CK809

2

3

C253

R254

R255

6

1

4

3

3

1

C259

R285

4

6

1
3

Q257

1

R286

R256

R281

3

R282
1

3

(+)

BATTERY TERMINAL (211)

4

R464

1

4

C252

D251

D281

6
4

R287

6
4

6
4

IC253

C753

C754

CK203

R288

IC258

IC260

SW401
EJECT

4

6
8
7

5

MAIN PWB-A (TOP VIEW)

7

8 9 10 11 12

Figure 41 WIRING SIDE OF P.W.BOARD (10/11)

– 41 –

14

R819

IC257

C291

R291

IC892

R818

R296

C818

R292

R295

C251

IC259

R251

R294

IC809

R277

R283

R279

R284

MD-MT180

TO MAIN PWB

P33,P35,P39,P41

8-C,D

CN601

MAGNETIC HEAD (20)

TO MAIN PWB

P33,P35,P39,P41

9-C,D
CN451

M901

SPINDLE MOTOR

MECHANISM
FLEXIBLE PWB (19)

M902

SLED MOTOR

M903

LIFT MOTOR

LCD UNIT (229)

KEY SWITCH FLEXIBLE PWB (228)

CN101

P33,P35,P39,P41

8,9-E,F

TO MAIN PWB

P33,P35,P39,P41

CN482

9,10-C,D

TO MAIN PWB

OPTICAL PICKUP (1)

Figure 42 WIRING SIDE OF P.W.BOARD (11/11)

– 42 –

PIN
NO.

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36

37
38
39
40
41
42
43
44
45
46
47
48

PIN
NO.

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

1
2
3
4
5
6
7
8
9

1
2
3
4
5
6
7
8
9

IC101

IC202

VOLTAGE

0.27V

0.27V

0.27V

0.27V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

0.28V

1.49V
0V
0V

2.61V

2.61V

2.36V
0V

1.31V

1.31V

0.26V

1.08V
0V

1.31V

1.31V

0.27V

2.61V

1.53V
0V

1.31V

0.19V

0.29V

1.31V

0.29V

0.51V

VOLTAGE

2.6V

1.8V
0V
0V
0V

0.3V

1.1V

1.45V

0.58V
0V

0.59V

2.61V
0V

0.55V

0.85V

0.85V

0.85V

0.85V

1.1V

1.88V

2.05V

1.82V

1.82V
0V

PIN
NO.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

PIN
NO.

1
2
3
4
5
6
7
8

PIN
NO.

1
2
3
4
5
6

PIN
NO.

1

2

3

4

5

6

7

8

PIN
NO.

1
2
3
4
5
6

VOLTAGE

0.79V

2.61V

1.31V
0V

2.61V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.31V

1.63V
0V
0V

1.31V
0V
0V
0V
0V
0V
0V
0V

0.23V

0.6V

0.6V

0.6V

1.45V

1.03V

2.61V

0.6V

0.9V

0.9V

0.9V

0.9V

1.88V
0V

2.1V

1.8V

1.8V

1.1V

1.8V

2.5V

1.1V

1.8V

1.1V

2.5V

1.98V

1.1V

IC251

VOLTAGE

2.1V
0V
0V
0V

4.36V

2.1V

2.1V

2.1V

IC253

VOLTAGE

0V
0V
0V

4.55V

4.51V
0V

IC255

VOLTAGE

–1.03V
0V
0V
–2.3V
0V
0V
–1.69V

2.6V

IC256

VOLTAGE

0V
0V
0V
0V

1.95V

1.95V

IC201

PIN
NO.

51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77

78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99

100

PIN
NO.

1
2
3
4

PIN
NO.

1
2
3
4
5
6

PIN
NO.

1
2
3
4
5
6

PIN
NO.

1
2
3
4
5
6

VOLTAGE

1.3V
0V
0V
0V

2.6V
0V
0V
0V
0V
0V

0.9V

1.6V
0V

0.71V

0.71V

2.6V

1.3V

0.46V
0V

1.3V

1.3V
0V
0V
0V

1.3V

1.3V
0V
0V
0V
0V
0V

2.6V
0V
0V

1.3V

2.6V

2.6V
0V

0.86V

0.86V

0.86V

0.86V

0.86V

0.86V

0.86V

0.86V

0.86V

2.52V

2.52V
0V

IC257

VOLTAGE

0V
0V
0V
0V

IC258

VOLTAGE

0V

0.59V

4.16V
0V
0V
0V

IC259

VOLTAGE

0V

0.54V

0.54V
0V

0.54V

2.51V

IC260

VOLTAGE

0V
0V
–2.36V
0V
0V
–0.2V

VOLTAGE

PIN

VOLTAGE

NO.

0V

1

0V

2

2.52V

3

2.5V

4

0V

5

0V

6

0V

7

0V

8

0V

9

0V

10

2.38V

11

2.52V

12

2.45V

13

2.45V

14

2.52V

15

0V

16

2.52V

17

0V

18

0V

19

0V

20

2.52V

21

2.52V

22

0.9V

23

0.88V

24

0.88V

25

1.03V

26

0.8V

27

0.8V

28

0.58V

29

0.58V

30

0V

31

0V

32

2.61V

33

2.58V

34

2.58V

35

2.52V

36

0V

37

2.52V

38

0V

39

2.52V

40

0V

41

2.52V

42

2.52V

43

0V

44

0V

45

0V

46

0V

47

0V

48

0V

49

2.52V

50

IC351

PIN

VOLTAGE

NO.

1

0V

2

0V

3

4.47V

4

0V

5

0V

6

4.47V
0V

7
8

1.18V

4.46V

9

10

0V

11

1.18V

12

4.46V

13

0V

14

4.5V

IC353

PIN

VOLTAGE

NO.

1

0.23V

2

0.23V
0V

3
4

0.42V
0V

5

2.61V

6

IC354

PIN

VOLTAGE

NO.

1.07V

1

0V

2

0V

3

0V

4

0V

5

IC401

PIN
NO.

51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77

78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99

100

PIN
NO.

1
2
3
4
5
6
7
8

PIN
NO.

1
2
3
4

PIN
NO.

10
11
12
13
14
15
16

1
2
3
4
5
6
7
8
9

VOLTAGE

2.52V

2.52V

2.52V

2.52V
0V
0V

2.52V

2.52V
0V

2.52V

2.44V

2.52V

2.52V

2.52V

2.52V

1.14V

1.18V

2.49V
0V

2.49V

2.44V
0V

2.61V

2.47V

2.5V

0.15V

2.52V

2.52V
0V

2.13V

1.49V

2.52V

2.52V

2.52V
0V
0V
0V
0V
0V
0V
0V

2.52V
0V

2.61V

2.52V
0V

2.5V

2.52V

2.52V

2.52V

IC402

VOLTAGE

0V

2.52V
0V
0V
0V
0V

2.52V
0V

IC431

VOLTAGE

0V

2.52V
0V
0V

IC501

VOLTAGE

0V

1.1V

1.1V
0V

2.31V
0V
0V
0V
0V

1.3V

1.26V

1.29V
0V
0V

0.54V

0.62V

PIN
NO.

10
11
12
13
14
15
16

17
18
19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36
37
38
39
40
41
42
43
44
45
46
47
48

49

50

51
52
53
54
55
56
57
58
59
60
61
62
63

64

PIN
NO.

10

1
2
3
4
5
6
7
8
9

1
2
3
4
5
6
7
8
9

IC601

IC651

VOLTAGE

0V
0V
0V
0V
0V
0V
0V

2.1V
0V
0V
0V
0V

2.1V
0V
0V

2.52V
0V

2.61V

0.78V

2.61V
0V
0V
0V

-

-

0.32V

0.25V

2.61V

0.23V
0V
0V

2.61V

0.21V

1.3V

2.1V
0V
0V

1.85V
0V

1.85V

2.1V

1.68V
0V

2.61V
0V

2.52V

2.52V

2.52V

1.3V

2.2V

3.91V

6.5V

7.81V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V

VOLTAGE

0V
0V
0V
0V
0V
0V

1.07V
0V

1.07V
0V

PIN
NO.

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

PIN
NO.

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

PIN
NO.

1
2
3
4
5

PIN
NO.

1
2
3
4

PIN
NO.

1
2
3
4
5
6

PIN
NO.

1
2
3
4

1
2
3
4
5
6
7
8
9

1
2
3
4
5
6
7
8
9

IC701

IC703

IC771

IC801

IC802

IC803

VOLTAGE

0.9V
0V

0.72V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
–2.39V
0V
0V

2.56V

0.88V
0V
0V
0V

VOLTAGE

0V
0V

0.29V
0V
0V

2.61V
–2.41V
0V
0V
0V
0V

1.32V

2.52V

2.61V
0V

2.61V
0V
–2.41V
–2.41V
0V
0V

1.29V
0V
0V

VOLTAGE

2.579V
0V

2.579V
0V

2.321V

VOLTAGE

0V

4.6V

2.02V
0V

VOLTAGE

0.49V

1.06V
0V

0.49V
1V

4.76V

VOLTAGE

4.55V

4.60V
0V
0V

MD-MT180

IC809

PIN

VOLTAGE

NO.

0V

1

2.52V

2

4.53V

3

4.56V

4

0V

5

0V

6

IC841

PIN

VOLTAGE

NO.

-

1

2.516V

2

2.098V

3

2.038V

4

0V

5

IC852

PIN

VOLTAGE

NO.

0V

1

2.5V

2

0V

3

0V

4

0.93V

5

0.93V

6

0V

7

0V

8

IC871

PIN

VOLTAGE

NO.

1.286V

1

2.513V

2

0V

3

0V

4

2.515V

5

IC873

PIN

VOLTAGE

NO.

1

6.94V

2

0V

2.51V

3
4

-

4.53V

5

IC892

PIN

VOLTAGE

NO.

0V

1

0V

2

0V

3
4

1.69V

0.6V

5

0V

6

IC902

PIN

VOLTAGE

NO.

0V

1

0V

2

2.61V

3

– 43 –

MD-MT180

ENV

1994 / 12 / 16 01:03:40

=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL

CH1 : 0.00V
CH2 : 0.00V

Main : 10K

Zoom : 10K
CH3 : 0.000V
CH4 : 0.00V

=Trigger=
Mode : NORMAL
Type : EDGE CH2
Detay : 0.0ns
Hold OFF : MINIMUM

T

TP201

(EFMMON)

TP210

(TEMON)

TP209

(TOTMON)

Stopped

CH1=1V

DC 10:1

CH3=500mV

DC 10:1 (2ms/div)

2ms/div

CH2=2V

DC 10:1

T

1

2

9

10
11

1994 / 12 / 16 01:23:16

=Filter=

=Tracel= P-P 1.280V

=Offset= =Record Length=
Smoothiing : OFF
BW : FULL

CH1 : 0.000V
CH2 : 0.00V

Main : 1K

Zoom : 1K
CH3 : 0.00V
CH4 : 0.00V

=Trigger=
Mode : AUTO
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM

T

TP201

(EFMMON)

Stopped

CH1=2V

DC 10:1 (500ms/div)

500ms/div

1

MORM:200MS/s

9

1994 / 12 / 15 08:39:46

=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL

CH1 : 0.00V
CH2 : 0.00V

Main : 10K

Zoom : 10K
CH3 : 0.00V
CH4 : 0.0V

=Trigger=
Mode : AUTO
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM

T

TP210

(TEMON)

Stopped

CH1=2V

DC 10:1

CH3=2V

DC 10:1 (1s/div)

1s/div

CH2=2V

DC 10:1

1

NORM:1kS/s

10

Stopped

CH1=1mV

DC 10:1

TP208

1

(FEMON)

1

TP120

2

(F+)

2

3

CK206

3

(CIN)

CK204

T

4

(FOK)

4

=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL

CH2=500mV

DC 10:1

CH1 : 0.00V
CH2 : 0.000V
CH3 : 0.00V
CH4 : 0.00V

T

CH3=5V

DC 10:1

Main : 10K
Zoom : 10K

1994 / 12 / 15 22:54:19

CH4=2V

50ms/div

DC 10:1 (50ms/div)

NORM:200kS / s

=Trigger=
Mode : NORMAL
Type : EDGE CH4
Detay : 0.0ns
Hold OFF : MINIMUM

WAVEFORMS OF MD CIRCUIT

CH2=2V

DC 10:1

CH1 : 0.00V
CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V

T

CH3=2V

DC 10:1

Main : 5K
Zoom : 5K

1994 / 12 / 16 00:24:17

CH4=2V

50us/div

DC 10:1 (50us/div)

NORM:100MS / s

=Trigger=
Mode : AUTO
Type : EDGE CH3
Detay : 0.0ns
Hold OFF : MINIMUM

5
6

7

8

Stopped

CH1=2V

DC 10:1

IC501(9)

(SDTi)

1

IC501(12)

(SCLK)

2

T

IC501(10)

(LRCK)

3

IC501(11)

(MCLK)

4

=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL

12

13

9

10
11

14

Stopped

CH1=2V

CH2=2V

DC 10:1 (50ms/div)

T

IC201(25)

1

(SPDRR)

IC601(18)

2

(SPDRR)

VM

Smoothiing : OFF
BW : FULL

Stopped

TP201

(EFMMON)

2

T

TP210

(TEMON)

1

TP209

(TOTMON)

=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL

Stopped

CH1=500mV

DC 10:1 (20us/div)

T

CK108

(ADIPO)

DC 10:1

=Filter= =Offset= =Record Length=

CH1 : 0.00V
CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V

T

CH2=2V

CH1=2V

DC 10:1

DC 10:1 (2ms/div)

CH1 : 0.00V
CH2 : 0.00V
CH3 : 0.000V
CH4 : 0.0V

CH2=2V

DC 10:1

T

CH3=500mV

Main : 10K
Zoom : 10K

DC 10:1

Main : 10K
Zoom : 10K

1994 / 12 / 15 23:31:21

50ms/div

ENV

=Trigger=
Mode : NORMAL
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM

1994 / 12 / 15 08:57:26

2ms/div

ENV

=Trigger=
Mode : NORMAL
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM

1994 / 12 / 15 09:10:03

20us/div

ENV

1

10

1
10
12

13

9

10

Stopped

CH1=2V

DC 10:1

TP208

(FEMON)

1

T

TP210

(TEMON)

2

BandwidthONSmooth

FULL 20MHz

=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL

Stopped

CH1=2V

DC 10:1

T

TP208

1

(FEMON)

TP210

2

(TEMON

)

IC201(25)

3

(SPDRR)

IC601(18)

4

(SPDRR)

VM

=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL

Stopped

CH1=2V

DC 10:1

TP201

(EFMMON)

1

TP210

T

(TEMON)

2

CH2=2V

DC 10:1

OFF

CH1 : 0.00V
CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V

CH2=2V

DC 10:1

CH1 : 0.00V
CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V

CH2=2V

DC 10:1

CH3=2V

DC 10:1

Main : 10K
Zoom : 10K

CH3=2V

DC 10:1

Main : 10K
Zoom : 10K

T

CH3=1V

DC 10:1

1994 / 12 / 18 09:26:46

CH4=2V

DC 10:1 (1s/div)

=Trigger=
Mode : AUTO
Type : EDGE CH2
Detay : 0.0ns
Hold OFF : MINIMUM

1994 / 12 / 15 09:58:45

CH4=2V

DC 10:1 (1s/div)

=Trigger=
Mode : AUTO
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM

1994 / 12 / 15 21:54:52

CH4=1V

500us/div

DC 10:1 (500us/div)

1s/div

ENV

1s/div

ENV

ENV

=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL

For TP208, TP209, and TP210, use the specific LPF, and
observe the waveform.

TP

CH1 : 0.000V
CH2 : 0.00V
CH3 : 0.000V
CH4 : 0.0V

Main : 4K
Zoom : 4K

10K

=Trigger=
Mode : NORMAL
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM

Measurement

0.001

15

3

TP121

4

(T-)

=Filter= =Offset= =Record Length=

Smoothiing : OFF

CH1 : 0.00V

BW : FULL

CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V

– 44 –

Main : 10K
Zoom : 10K

=Trigger=
Mode : NORMAL
Type : EDGE CH2
Detay : 0.0ns
Hold OFF : MINIMUM

When watching the EEM monitor (TP201)
Set MSL from 00
completion restore 00

H to 80H with EEPROM control setting. After

H.

MD-MT180

TROUBLESHOOTING

It is advisable to use the TEST mode (refer to Error Data Display Mode, P14) indicating the causes of troubles before
starting repair. Causes of operation errors (up to 10 errors) are recorded as error codes. This information is useful
for repair.

When MD playback does not function

When the objective lens of the optical pickup is dirty, this section may not operate. Clean the objective lens, and check the playback
operation. When this section does not operate even after the above step is taken, check the following items.
Remove the cabinet and follow the troubleshooting instructions.
"Track skipping and/or no TOC (Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup
lens. Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."

Turn the power off.
Gently clean the lens with a lens cleaning tissue and a small amount of lens cleaner on the market.
Do not touch the lens with the bare hand.

Is the power supply turned on when the main unit button
is pressed?

Yes

Does the display operate normally?

Yes

Is playback state set?

Yes

Is audio output normal?

Yes

Is recording/playback operation normal?

• Abnormal display

Are the pin 7 (VCC) and pin 6 (GND) normal?

Yes

No

No

No

No

No

No

Perform the check stated in item "Power is not turned on
when the PLAY button is pressed".

Perform the check stated in item "Abnormal display".

Perform the check stated in item "Playback state cannot be
set".

Perform the check stated in item "Audio playback circuit".

Perform the check stated in item "Recording/playback
operation".

Is waveform output from IC401 pins 9,11,13?Is waveform output from CN482 pins 1 to 3?

Check between IC401 and
CN482.

Yes

No

Check the periphery of IC401.

Check for pattern breakage of flexible PWB, check for
defects of display microcomputer (replace the display unit).

– 45 –

MD-MT180

• Audio playback circuit

Although the playback time display is acting., no sound is given during playback in the normal mode.
Is audio waveform output from IC501 pins 15 and 16?

Yes

Is audio waveform output from IC703 pins 8 and 17.

Yes

Is audio waveform output from J703A pins 2 and 3.

Yes

Check headphones jack, and periphery of headphone.

• The spindle motor fails to run. Does the head move

Does the waveform appear on the IC201 pins 24 and 25 after
TEST mode AUTO2 completion and in this state?

Yes

Does waveform appear on the IC601 pin 36?

Yes

No

No

No

No

No

Check IC201 pins 70 to 72, pin 74 and IC501 pins 9, 10, 11, 12.

Check the pins 4 and 21 of IC703.

Check whether there is defective solder joint of audio signal line
between IC703 and J703A

Check the IC201 periphery.

Replace. IC601

Does waveform appear on IC601 pins 56, 57 and 58?

Yes

Replace the spindle motor.

No

L605, IC201, IC601, CN601 and flex, etc. soldering check

– 46 –

• Recording/playback operation.

Insert a low reflection disc, and ascertain audio output by normal playback, and then set TEST REC mode.
Change MSL from 00H to 80H by the control setting of EEPROM. After completing the operation, return in to 00H.

Does the head move down, failing to start record even
when the continuous record mode is set after address ?

Yes

No

Check voltage of pins 57 and 58 of IC201, pins 3, 4, 7, and 9 of
IC651, pins 4 and 5 of CN601. Check whether disc is record­inhibited.

MD-MT180

Does the RF waveform appear at TP201 when recording/
Playback is performed.

No

Does level of pins 44 of IC401 and pin 86 of change
depending on record and playback ?

Yes

Is RF pattern output from IC201 pin 50 ?

Yes

Check whether there is any damage in IC101, periphery of
laser diode.
Check for defects of IC351 head, flexible PWB.

Check whether input waveform is observed on the pins 5
and 6 of IC701.

Yes

Is audio waveform observed on the pins 10 and 12 of IC701 ?

Yes

Yes

No

No

No

No

Check periphery of IC401 and IC101.

Check for soldering failure of IC201 .

Check whether the audio signal line between IC701 and J701 is
defective.

Check whether the voltage of pins 13 to 15 of IC701 varies with
the recording VOLUME +/– button operation. Check whether the
soldering of IC701 is poor.

Is the output waveform output to the pin 8 of IC501 ?

Yes

Check the periphery of IC501 and the waveform of the pins
70 to 73 of IC201.

No

Check whether the pin 7 of IC501 and the pin 81 of IC201 are in
H state.

– 47 –

MD-MT180

FUNCTION TABLE OF IC

IC401 RH-iX0484AWZZ :System Microcomputer (IX0484AW) (1/2) Main PWB Version B,C,X
IC401 RH-iX0529AWZZ :System Microcomputer (IX0529AW) (1/2) Main PWB Version D

Pin No.

1 P12 CIN Output Track cross signal/focus drive detection
2 P13 SPIN Input/Output Spindle motor FG pulse detection input
3* P14 RFPCNT Output RF control
4 P15 DISCPR Output Disc record inhibition switch input
5* TIOCA2 SPWDS Output Reserve
6* P17 LCDRST Output Reserve
7 VSS VSS — Ground potential
8* TxD0 RMDAT Output Remote control indication data output
9 TxD1 DSPDAT Output Unit indication data output
10* P32 P32 Output Reserve
11 P33 DSPSTB Output Main unit display strobe output
12* SCK0 SCK0 Output Serial I/O clock output (not used)
13 SCK1 DSPSCK Output Unit indication data clock output
14 PE0 _EPCS Output EEPROM chip selection output
15 PE1 EEPD Input/Output EEPROM serial data input/output
16 PE2 EEPK Output EEPROM serial clock output
17 PE3 EPRT Output EEPROM write protection
18 VSS VSS — Ground potential
19* PE4 PE4 Output Reserve
20 PE5 SYRS Output System LSI register selection output
21 PE6 _SYRD Output System LSI read enable output
22 PE7 _SYWR Output System LSI write enable output
23-30 PD0-PD7 SYD0-SYD7 Input/Output System LSI parallel data bus
31 VSS VSS — Ground potential
32 PC0 RCLAT Output Record audio IC data latch output
33 PC1 _MCPGI Input Microphone plug insertion detection input
34 PC2 _INPGI Input Line/digital plug insertion detection
35 PC3 INPGCK Input Line/digital plug type detection
36 PC4 RCPCNT Input/Output Record circuit power control output
37* PC5 TEST1 Input Test mode setting input 1
38* PC6 TEST0 Input Test mode setting input 0
39 PC7 JPNP Input Kana conversion/Kana input existence/nonexistence discrimination
40 VCC VCC — Positive power supply
41 PB0 OPICGA Output P.U detection sensitivity switching output
42 PB1 PBOPON Output Audio IC output stage control output
43 PB2 PBLAT Output Audio IC data latch output
44 PB3 LDON Output P.U. laser ON/OFF control output
45 PB4 DISCP Output RF amp TE polarity switching output
46 PB5 SGAIN Output RF amp gain polarity switching output
47 PB6 RACLK Output Audio IC data clock output
48 PB7 RADAT Output Audio IC serial data output
49 VSS VSS — Ground potential
50* PA0 DLBHP Input Judgement input
51 PA1 SLCNT1 Output Stepping control 1
52 PA2 SLCNT2 Output Stepping control 2
53 PA3 SLCNT3 Output Stepping control 3
54* P20 DHLAT Output Latch output for dolby headphone
55 P21 EMPH0 Output Audio emphasis control output 0
56 P22 BUZOUT Output Beep sound pulse output
57 MD0 MD0 Input Operation mode selection input 0

Input/Output

In this unit, the terminal with asterisk mark (*) is open terminal which is not connected to the outside.

– 48 –

FunctionPort Name Terminal Name

MD-MT180

IC401 RH-iX0484AWZZ :System Microcomputer (IX0484AW) (2/2) Main PWB Version B,C,X
IC401 RH-iX0529AWZZ :System Microcomputer (IX0529AW) (2/2) Main PWB Version D

Pin No.

58 MD1 MD1 Input Operation mode selection input 1
59 P23 DCEXT Input/Output DC-IN detection (level)
60* WDT0VF WDT0VF Output Watch dog timer (not used)
61 MD2 MD2 Input Operation mode selection input 2
62 RES _RESET Input Microcomputer hard reset input
63 NMI NMI Input Nonmaskable interruption input (not used)
64 STBY _STBY Input Microcomputer standby input (not used)
65 VCC VCC — Positive power supply
66 XTAL XTAL — Crystal connection terminal
67 EXTAL EXTAL — Crystal connection terminal
68 VSS VSS — Ground potential
69 PF7 _PLAY Input Unit PLAY button operation detection input
70 PF6 _REC Input Unit REC button operation detection input
71 PF5 _STOP Input Unit STOP button operation detection input
72* PF4 PF4 Output Reserve
73 IRQ3 _DINT Input System LSI interruption
74 IRQ2 ARQD Input Disk cap opens and closes detection/it is started and required
75 IRQ1 _RPLAY Input Remote control PLAY key operation detection input
76 IRQ0 _ARQK Input Start request by the key /DC-IN input
77 AVCC AVCC — A/D and D/A converter positive power supply
78 VREF VREF — A/D and D/A converter reference voltage
79 AN0 PLVBAT Input Battery voltage detection input
80 AN1 CHIMON Input D/C - D/C converter unusual voltage detection
81 AN2 TEMP Input Ambient temperature detection input
82 AN3 RKEY Input Remote control key operation detection input
83 AN4 HKEY1 Input Unit key operation detection input 1
84 AN5 HKEY2 Input Unit key operation detection input 2
85 P46/AN6/DA0 CHGCNT Output Charging current control output
86 DA1 LDVAR Output P.U. laser power setting output
87 AVSS AVSS — A/D and D/A converter ground potential
88 VSS VSS — Ground potential
89 P24 CHGON Output Battery charge ON/OFF control output
90* TIOCB4 MCMON Output Internal operation status monitor
91 P26 PLVON Output Battery power supply line ON/OFF
92 P27 DCNT1 Output Mechanism driver enable output
93 PG0 SENSE Input/Output System LSI servo sense input
94 PG1 _FOK Input/Output Focus OK signal input
95 PG2 _XRST Output System LSI hard reset output
96* PG3 CKSTP Output Microcomputer standby operation monitor output
97 PG4 _EJSW Input/Output Ejection lever operation detection input
98 VCC VCC — Positive power supply
99 P10 PCNT2 Output Servo DC-DC converter ON/OFF control
100 P11 PCNT1 Output Main DC-DC converter ON/OFF control

Port Name

Terminal Name Input/Output

In this unit, the terminal with asterisk mark (*) is open terminal which is not connected to the outside.

Function

– 49 –

MD-MT180

IC201 VHiLR378161-1 :Endec/Servo/Atrac (LR378161)
System LSI expansion output port (LR378161)

Pin No. Function

56 EXPORT0 LEDON1 Output LED ON/OFF 'H':ON"L":OFF
57 EXPORT1 LDCNT1 Output Recording head raising-lowering control output 1 See the separate table *3.
58 EXPORT2 LDCNT2 Output Recording head raising-lowering control output 2 (Open)
59 EXPORT3 EMPH1 Output Audio emphasis control output 1 See the separate table *2.
78 EXPORT4 HDON Output Not used. 'H': Record electric current
79 EXPORT5 OPTCNT Output Optical digital input circuit control 'H': Circuit operation ON
80 EXPORT6 DAPON Output D/A converter operation control output 'H': Operation ON
81 EXPORT7 ADPON Output A/D converter operation control output 'H': Operation ON

Port Name

Terminal Name

Input/Output

Remarks

*1: List of TEST port settings

TEST1

TEST0

H H Normal mode
H L No adjustment mode
L H Test mode
L L (Settings prohibited)

Details

*2: List of EMPH port settings

EMPH1 EMPH0

H H fs=32K: 'ON'
H L fs=48K: 'ON'
L H OFF
L L fs=44.1K: 'ON'

IC201 VHiLR378161-1 :Endec/Servo/Atrac (LR378161)

FEMON

DADATA

ADDATA

DFCK

BCLK

LRCK

DGND

PLLBVC

DOUT

DIN

X1O

X1I

DGND

VDD1

VPO

75747372717069686766656463626160595857565554535251

FOK

VDD2

RSTX

SYRS

76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100

LR378161

TOTMON

TEMON

HDON

OPTCNT

DAPON
ADPON

SENSE

COUT

MCCK

DINTX

DGND

SYSD0
SYSD1
SYSD2
SYSD3
SYSD4
SYSD5
SYSD6
SYSD7

SYWRX

SYRDX

Details

VXI

EMPH1

LDCNT2

LDCNT1

LEDON1

*3: List of LDCNT port settings

LDCNT1 LDCNT0

H H Brake
H L Drive UP
L H Drive DOWN
L L Output OFF

DILOCK

TEST1

TEST0

TCRS

X700KO

50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26

Details

EFMO
PLCK
ACRCER
RAA11
RAD0
RAD1
RAWEX
RARASX
RAA9
RAD3
RAD2
RACASX
DGND
RAOEX
RAA8
RAA7
RAA6
RAA5
RAA4
VDD2
RAA10
RAA0
RAA1
RAA2
RAA3

12345678910111213141516171819202122232425

FIN

AIN

BIN

EFMI

AVCC

EFMMON

AGND

AVCC2

WBI

VREF

TCG

EIN

VBAT

VDD1

DGND

TEST2

FODRF

FODRR

X176KO

TRDRF

TRDRR

SLDRF

SLDRR

SPDRF

– 50 –

SPDRR

MD-MT180

IC601 VHiLV8201W+-1 :PWM Driver (LV8201W)(1/2)

Pin No. Terminal Name

1 COM Spindle motor COM point connection terminal.
2 IN1F H bridge 1 logic input terminal. Output from pins 9 and 7.
3 IN1R
4 IN2F H bridge 2 logic input terminal. Output from pins 12 and 14.
5 IN2R
6 GND2 GND terminal in the MOS circuit section.
7 OUT1R H bridge 1 reverse output terminal.
8 VS1 H bridge 1 motor power supply terminal. The capacitor is connected to the GND terminal.
9 OUT1F H bridge 1 forward output terminal.
10 PGND1 H bridge 1 output section GND terminal.
11 PGND2 H bridge 2 output section GND terminal.
12 OUT2F H bridge 2 forward output terminal.
13 VS2 H bridge 2 motor power supply terminal. The capacitor is connected to the GND terminal.
14 OUT2R H bridge 2 reverse output terminal.
15* NC NC terminal.
16 MUTE Mute terminal for H bridge 1-, 2-, 3-phase thread, and half bridge.

17 S/S Start/stop terminal in the spindle motor section. Started with “H” level input.
18 BRK Brake terminal in the spindle motor section. Counter torque brake applied with “L” level input.
19 VCO VCO oscillation terminal. The capacitor is connected to the GND terminal.

20 VCC1 Terminal for supplying power to the bipolar circuit. The capacitor is connected to the GND terminal.

21 VCOIN

22 RMAX

23 RMIN VCO minimum frequency setting terminal. The frequency rises by lowering the connection resistance.
24* VCTL Speed control input terminal.
25* VCREF Terminal with referential voltage for speed control.
26* NC NC terminal
27 PWM
28 GND1 GND of bipolar circuit section.
29* NC NC terminal
30* SWCO Position detection comparator output terminal in the thread driver section.
31* SVCO
32* SUCO
33* SCOM Input terminal for position detection comparator COM in the thread driver section.
34 SEL Switching terminal for digital input “H”/analog input “L”. In digital input, torque directional signal is input into

35 VS3 Power supply terminal for half bridge output section. The capacitor is connected to the GND terminal.
36 OUT3 Half bridge output terminal
37 PGND3 GND terminal for half bridge output section.
38 SWO 3-phase thread W-phase output terminal.
39 PGND4 Thread output section GND terminal.
40 SVO 3-phase thread V-phase output terminal.
41 VS4 Power supply terminal for 3-phase thread output section. The capacitor is connected to the GND terminal.
42 SUO 3-phase thread U-phase output terminal.
43 FG FG pulse output terminal (MOS output). It outputs the pulse equivalent to 3-hole.

Output terminals of drivers above have high impedance when L is input.

VCO oscillation frequency is changed in accordance with the revolution speed of the motor (voltage at VCOIN terminal).

Used by connecting to the VCC2 terminal (pin 44).
VCO control voltage input terminal. The capacitor is connected to the GND terminal.

Control output is generated according to the revolution speed of the motor inside the logic, and charged/discharged to the
capacitor connected to the GND terminal. The voltage at this terminal controls the VCO oscillation frequency.

VCO maximum frequency setting terminal. The resistor is connected to the GND terminal. The frequency rises by
lowering the resistance. With the VCOIN terminal set to VCC-1V, the VCO oscillation frequency is set to
than 48 times of the switching frequency at the highest revolution speed of the motor.

PWM signal input terminal in digital input mode (when SEL terminal is “H”). Output TR is turned on by inputting “H”.

the BRK terminal (pin 18) and PWM signal into PWM terminal to drive the spindle motor.

Function

more

In this unit, the terminal with asterisk mark (*) is open terminal which is not connected to the outside.

– 51 –

MD-MT180

IC601 VHiLV8201W+-1 :PWM Driver (LV8201W)(2/2)

Pin No. Terminal Name Function

44 VCC2 Terminal for supplying power to MOS circuit. Used by connecting to VCC1 terminal (pin 20).
45 IN3 Half bridge logic input terminal. Output from pin 36.
46 S3 Logic input terminal in 3-phase thread section. Output from pins 42, 40, and 38.
47 S2
48 S1
49 CP2 Output terminal for charge pump booster pulse. The capacitor is connected between this terminal and

50 CP1
51 CPC1
52 CPC2

53 VG Charge pump booster output terminal. The capacitor is connected to the GND terminal.
54,60 RF
55,59 VS Power supply terminal for driving the spindle motor. The capacitor is connected to the GND terminal.
56 WOUT Spindle section output terminal. The motor coil is connected.
57 VOUT
58 UOUT
61 UCIN Input terminal for spindle motor position detection comparator. The capacitor is connected between this
62 VCIN terminal and COMIN terminal (pin 64).
63 WCIN
64 COMIN Input terminal for spindle motor position detection comparator. The capacitor is connected between this

CPC2 terminal (pin 52). Open this when used with doubled voltage.
Charge pump booster output terminal. The capacitor is connected between this terminal and CPC1 terminal (pin 51).
Charge pump booster terminal. The capacitor is connected between this terminal and CP1 terminal (pin 50).
Charge pump booster terminal. The capacitor is connected between this terminal and CP2 terminal (pin 49).

Open this when used with doubled voltage.

Output current detection terminal. The drive current is detected by connecting the GND terminal with low resistance.

terminal and pins 61-63.

In this unit, the terminal with asterisk mark (*) is open terminal which is not connected to the outside.

IC601 VHiLV8201W+-1 :PWM Driver (LV8201W)

RF

VG

VS

COM

IN1F

IN1R

IN2F

IN2R

GND2

OUT1R

VS1

OUT1F
PGND1
PGND2

OUT2F

VS2

OUT2R

NC

MUTE

1
2
3
4
5
6
7
8
9
10
11
12

13
14
15
16

WOUT

VOUT

UOUT

VS

RF2

UCIN

VCIN

WCIN

COMIN

6364 62 61 60 59 58 57 56 55 54 53

LV8201W

52 51 50 49

CPC1

CPC2

CP1

CP2

48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33

S1
S2
S3
IN3
VCC2
FG
SUO
VS4
SVO
PGND4
SWO
PGND3
OUT3
VS3
SEL
SCOM

17 18 19 20 21 22 23 24 25 26 27

S/S

BRK

VCO

VCC1

VCOIN

RMIN

RMAX

VCTL

VCREF

NC

– 52 –

28 29 30 31 32

NC

PWM

GND1

SWCO

SVCO

SUCO

IC202 RH-iX2824AFZZ: 16M Bit D-RAM (IX2824AF)

MD-MT180

Pin No.

1 Vcc Power supply (2.6V)
2 I/O1 Data input/data output
3 I/O2 Data input/data output
4 WE Write enable
5 RAS Low address strobe
6* NC Not connected
7 A10 Address input
8-11 A0-A3 Address input
12 Vcc Power supply (2.6V)
13 GND Ground (0V)
14-19 A4-A9 Address input
20 OE Output enable
21 CAS Column address strobe
22 I/O3 Data input/data output
23 I/O4 Data input/data output
24 GND Ground (0V)

Terminal Name

Function

In this unit, the terminal with asterisk mark (*) is open terminal which is not connected to the outside.

– 53 –

MD-MT180

— M E M O —

– 54 –

PARTS GUIDE

PORTABLE MINIDISC RECORDER

MODEL MD-MT180(S)

MD-MT180

“HOW TO ORDER REPLACEMENT PARTS”

To have your order filled promptly and correctly, please furnish the
following information.

1. MODEL NUMBER 2. REF. No.

3. PART NO. 4. DESCRIPTION

MARK: SPARE PARTS-DELIVERY SECTION

Explanation of capacitors/resistors parts codes

Capacitors

VCC ....................... Ceramic type

VCK........................ Ceramic type

VCT........................ Semiconductor type

VC • • MF ............... Cylindrical type (without lead wire)

VC • • MN............... Cylindrical type (without lead wire)

VC • • TV................ Square type (without lead wire)

VC • • TQ ............... Square type (without lead wire)

VC • • CY ............... Square type (without lead wire)

VC • • CZ ............... Square type (without lead wire)

VC • • • • • • • • • J .. The 13th character represents capacity difference.

("J" ±5%, "K" ±10%, "M" ±20%, "N" ±30%,
"C" ±0.25 pF, "D" ±0.5 pF, "Z" +80-20%.)

If there are no indications for the electrolytic capacitors, error is ±20%.

For U.S.A. only

Contact your nearest SHARP Parts Distributor to order.

For location of SHARP Parts Distributor,
Please call Toll-Free;
1-800-BE-SHARP

Resistors

VRD ....................... Carbon-film type

VRS........................ Carbon-film type

VRN ....................... Metal-film type

VR • • MF ............... Cylindrical type (without lead wire)

VR • • MN............... Cylindrical type (without lead wire)

VR • • TV................ Square type (without lead wire)

VR • • TQ ............... Square type (without lead wire)

VR • • CY ............... Square type (without lead wire)

VR • • CZ ............... Square type (without lead wire)

VR • • • • • • • • • J .. The 13th character represents error.

("J" ±5%, "F" ±1%, "D" ±0.5%.)

If there are no indications for other parts, the resistors are ±5%
carbon-film type.

NOTE:

Parts marked with “ ” are important for maintaining the safety of the set.
Be sure to replace parts with specified ones for maintaining the safety and performance of the set.

MD-MT180

NO.

PART CODE

PRICE
RANK

DESCRIPTION

INTEGRATED CIRCUITS

IC1 VHIVHC164FT-1 J CMOS LOGIC,VHC164FT
IC2 VHITC7W74FK-1 J CMOS LOGIC,TC7W74FK
IC101 VHIIR3R58M/-1 J AM RF Signal Processor,IR3R58M

IC201 VHILR378161-1 J BQ Endec/Servo/Atrac,LR378161
IC202 RH-IX2824AFZZ J AX 16M BIT D-RAM,IX2824AF
IC251 VSFTD2017++-1 J AL N-ch MOS FET,FTD2017
IC253 VSXP04313++-1 J AC Power Select Charge Drive,

IC255 VHINJM022V/-1 J AG Ope Amp.,NJM022V
IC256 VSXP04315++-1 J AC Digital Transistor,XP04315
IC257 VHIS80808LN-1 J AE Reset,S80808LN
IC258,259 VSXP04501++-1 J AC Power Transistor,XP04501
IC260 VSXP04313++-1 J AC Power Select Charge Drive,

IC351 VHI74ACT02T-1 J AE Head Driver,74ACT02T
IC353 VSMCH6616++-1 J AG Head Driver,MCH6616
IC354 VHICPH5608/-1 J AH Head Driver,CPH5608
IC401 RH-IX0484AWZZ J BB

IC401 RH-IX0529AWZZ J BA
IC402 VHI58X2402T-1 J AF EEPROM,58X2402T

IC431 VHIS80820LN-1 J AD Reset,S80820LN
IC501 VHIAK4551VT-1 J AU AD/DA Converter,AK4551VT
IC601 VHILV8201W+-1 J BA PWM Driver,LV8201W
IC651 VHILB1930M/-1 J AH Motor Driver,LB1930M
IC701 VHIIR3R54N/-1 J AQ Audio Amp.,IR3R54N
IC703 VHIIR3R59N/-1 J AN Audio Amp.,IR3R59N
IC771 VHI6204B23M-1 J AF 2.3V Regulator,6204B23M
IC801 VHIMM3032A+-1 J AE 3.0V Regulator,MM3032A
IC802 VSXP04501++-1 J AC Power Transistor,XP04501
IC803 VHIS80819LN-1 J AE Reset IC,S80819LN
IC809 VSXP04313++-1 J AC Power Select Charge Drive,

IC841 VHI6372C251-1 J AH 2.5V UP Converter,6372C251
IC852 VHIIR3M14N/-1 J AK DC/DC Converter,IR3M14N
IC871 VHI74HC1G86-1 J AE Exclusive or Gate,74HC1G86
IC873 VHI6204B45M-1 J AF 4.5V Regulator,6204B45M
IC892 VSXP04501++-1 J AC Power Transistor,XP04501
IC902 VHI62FP1602-1 J AF Regulator,62FP1602

[Main PWB Version B,C,X]
[Main PWB Version B,C,X]

XP04313

XP04313

System Microcomputer,IX0484AW

[Main PWB Version B,C,X]

System Microcomputer,IX0529AW

[Main PWB Version D]

XP04313

TRANSISTORS

Q250 VSKTA2015Y+-1 J AC Silicon,PNP,KTA2015 Y
Q251 VS2SD1819AS-1 J AC Silicon,NPN,2SD1819 AS
Q257 VS2SB1462J+-1 J AC Silicon,PNP,2SB1462 J
Q461 VS2SD1819AS-1 J AC Silicon,NPN,2SD1819 AS
Q711 VSDTC123TKA-1 J AC Digital,NPN,DTC123 TKA
Q801 VS2SJ520TL+-1 J AM FET,2SJ520 TL (P-ch)
Q803 VSUN5213+++-1 J AC Digital,NPN,UN5213
Q821 VSMCH3409++-1 J AF FET,MCH3409
Q851 VSMCH3409++-1 J AF FET,MCH3409
Q891 VSXP01401++-1 J AC Silicon,PNP,XP01401
Q901 VSUN5210+++-1 J AC Digital,NPN,UN5210

DIODES

D1,2 VHD1SS385++-1 J Silicon,1SS385
D251 VHDMA111///-1 J AC Silicon,MA111

D281 VHDMA111///-1 J AC Silicon,MA111
D351 VHDSBE803//-1 J AD Silicon,SBE803
D431 VHDMA132WK/-1 J AB Silicon,MA132WK
D461 VHDRB731U//-1 J AC Silicon,RB731U
D467 VHD1SS389//-1 J AB Silicon,1SS389
D495,496 VHEMA8075M/-1 J AC Zener,MA8075M
D651 VHDF10J2E//-1 J AC Silicon,F10J2E
D801 VHDF05J2L//-1 J AC Silicon,F05J2L
D802 VHEMA8051M/-1 J AC Zener,MA8051M
D803 VHD1SS388++-1 J AC Silicon,1SS388
D821 VHDM1FH3+++-1 J AD Schottky,M1FH3
D841 VHDF10J2E//-1 J AC Silicon,F10J2E
D842,843 VHDHRB0103B-1 J AC Silicon,HRB0103B
D851 VHDM1FH3+++-1 J AD Schottky,M1FH3
D861,862 VHDF10J2E//-1 J AC Silicon,F10J2E

[Main PWB Version B,C,X]

NO. PARTS CODE

PRICE

RANK

DESCRIPTION

COILS

L100 VPBNN100K0000 J AC 10 µH
L101 RCILC0353AFZZ J AB Tip Solid Induction,100mA
L171 RCILC0356AFZZ J AC 10 µH
L202 VPBNN100K0000 J AC 10 µH
L204 RCILC0353AFZZ J AB Tip Solid Induction,100mA
L452 RCILC0352AFZZ J AB Tip Impeder,150mA
L453,454 RCILC0353AFZZ J AB Tip Solid Induction,100mA
L601~604 RCILC0372AFZZ J AC 22 µH,Choke
L605 RCILC0372AFZZ J AC 22 µH,Choke
L702~704 RCILC0353AFZZ J AB Tip Solid Induction,100mA
L800,801 RCILZ0027AWZZ J AD 100 MHz,Tip Impeder
L802 RCILZ0027AWZZ J AD 100 MHz,Tip Impeder
L821 RCILC0016AWZZ J AE 10 µH
L841 RCILC0372AFZZ J AC 22 µH,Choke
L851 RCILC0016AWZZ J AE 10 µH
L860 VPCBM101K0000 J AC 100 µH

VIBRATORS

XL201 RCRSC0028AFZZ J AH Crystal,33.8688 MHz
XL401 RCRM-0203AFZZ J AD Ceramic,4.19 MHz

CAPACITORS

C1 VCCCCY1HH101J J AA 100 pF (CH),50V
C2,3 VCKYCY1CB104K J AB 0.1 µF,16V
C100 VCSAFA0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum

C102,103 VCKYCY0JB105K J AC 1 µF,6.3V
C106 VCKYCY0JB105K J AC 1 µF,6.3V
C107 VCKYCZ1CB333K J AB 0.033 µF,16V
C108,109 VCKYCY0JB105K J AC 1 µF,6.3V
C110 VCKYCY1AB224K J AB 0.22 µF,10V
C111 VCKYCY0JB105K J AC 1 µF,6.3V
C112 VCKYCZ1CB333K J AB 0.03 µF,16V
C113 VCKYCY0JB105K J AC 1 µF,6.3V
C114 VCCCCZ1HH5R0C J AB 5 pF (CH),50V
C121,122 VCCCCZ1HH221J J AB 220 pF (CH),50V
C130,131 VCKYCY1CB104K J AB 0.1 µF,16V
C132,133 VCKYCY1AB224K J AB 0.22 µF,10V
C165 VCKYCY1EB333K J AC 0.033 µF,25V
C171,172 VCSAFA0JJ336M J AE 33 µF,6.3V,Electrolytic,Tantalum
C201 VCSATA0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C202 VCSAFA0JJ336M J AE 33 µF,6.3V,Electrolytic,Tantalum
C203 VCKYCY1CB104K J AB 0.1 µF,16V
C204 VCKYCY1AB474K J AC 0.47 µF,10V
C205 VCKYCY1CB104K J AB 0.1 µF,16V
C207 VCKYCY1CB104K J AB 0.1 µF,16V
C209 VCKYCY1CB104K J AB 0.1 µF,16V
C211 VCCCCY1HH5R0C J AA 5 pF (CH),50V
C212 VCCCCY1HH8R0D J AA 8 pF (CH),50V
C221 VCCCCY1HH220J J AA 22 pF (CH),50V
C251 VCKYCY1CB104K J AB 0.1 µF,16V
C252 VCKYCY1CB104K J AB 0.1 µF,16V
C253~255 VCKYCY1CB104K J AB 0.1 µF,16V
C259 VCKYCY1CB104K J AB 0.1 µF,16V
C291 VCKYCY0JB105K J AC 1 µF,6.3V
C351 VCCCCY1HH470J J AA 47 pF (CH),50V
C353 VCSATA0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C354 VCKYCY1CB104K J AB 0.1 µF,16V
C357 VCKYCY1CB104K J AB 0.1 µF,16V
C361 VCKYTV1HB393K J AB 0.039 µF,50V
C401 VCKYCY1CB104K J AB 0.1 µF,16V
C431 VCKYCY1AB474K J AC 0.47 µF,10V
C454 VCKYCY1HB222K J AA 0.0022 µF,50V
C481 VCKYCY1CB104K J AB 0.1 µF,16V
C482 VCKYCY1EB103K J AA 0.01 µF,25V
C492 VCKYCY0JB105K J AC 1 µF,6.3V
C501,502 VCKYCY1HB222K J AA 0.0022 µF,50V
C503 VCSATA1AJ335M J AB 3.3 µF,10V,Electrolytic,Tantalum
C509,510 VCKYTV1CF225Z J AC 2.2 µF,16V
C511 VCKYCY0JB105K J AC 1 µF,6.3V
C551 VCKYCY1EB223K J AB 0.022 µF,25V
C601~605 VCKYCY0JB105K J AC 1 µF,6.3V
C608 VCKYCY0JB105K J AC 1 µF,6.3V
C611,612 VCKYCY1CB104K J AB 0.1 µF,16V
C613 VCKYCY0JB105K J AC 1 µF,6.3V

[Main PWB Version B,C,X]
[Main PWB Version B,C,X]

– 1 –

MD-MT180

NO. PART CODE

C615 VCKYCY0JB105K J AC 1 µF,6.3V
C617~619 VCKYCZ1EB472K J AB 0.0047 µF,25V
C620 VCKYCY1HB682K J AA 0.0068 µF,50V
C621 VCKYCY0JB105K J AC 1 µF,6.3V
C652 VCKYCY1CB104K J AB 0.1 µF,16V
C701,702 VCSATA0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C703 VCKYCY1EB103K J AA 0.01 µF,25V
C711,712 VCCCCY1HH101J J AA 100 pF (CH),50V
C713,714 VCKYCY0JB105K J AC 1 µF,6.3V
C715,716 VCKYCY1CB104K J AB 0.1 µF,16V
C733,734 VCKYCY1CB104K J AB 0.1 µF,16V
C753,754 VCKYCY0JB105K J AC 1 µF,6.3V
C758 VCKYCY0JB105K J AC 1 µF,6.3V
C760 VCKYCY1CB104K J AB 0.1 µF,16V
C761,762 VCKYTV1CF225Z J AC 2.2 µF,16V
C765,766 VCKYTV1CB224K J AB 0.22 µF,16V
C771 VCSAFA0JJ336M J AE 33 µF,6.3V,Electrolytic,Tantalum
C773 VCKYCY1AB224K J AB 0.22 µF,10V
C774 VCKYCY0JB105K J AC 1 µF,6.3V
C801 VCKYCY0JB105K J AC 1 µF,6.3V
C802 VCKYCY1EB103K J AA 0.01 µF,25V
C818 VCKYCY1CB104K J AB 0.1 µF,16V
C821 VCKYCY0JB105K J AC 1 µF,6.3V
C830 VCKYCY0JB105K J AC 1 µF,6.3V
C836 VCKYCY0JB105K J AC 1 µF,6.3V
C837 VCKYCY0JB105K J AC 1 µF,6.3V
C839 VCKYCY1AB334K J AC 0.33 µF,10V
C840 VCEAPW0GW227M J AD 220 µF,4.0V,Electrolytic
C841 VCKYCY0JB105K J AC 1 µF,6.3V
C842 VCSAFA0JJ336M J AE 33 µF,6.3V,Electrolytic,Tantalum
C843 VCKYCY1AB224K J AB 0.22 µF,10V
C845,846 VCKYCY1CB104K J AB 0.1 µF,16V
C847,848 VCKYCY1CB104K J AB 0.1 µF,16V
C850 VCKYCY1CB104K J AB 0.1 µF,16V
C851 VCKYCY0JB105K J AC 1 µF,6.3V
C852 RC-SZ0001AWZZ J AG 22 µF,6.3V,Electrolytic
C853 VCEAPW0GW227M J AD 220 µF,4.0V,Electrolytic
C856 VCCCCY1HH680J J AA 68 pF (CH),50V
C857 VCCCCY1HH180J J AA 18 pF (CH),50V
C860 VCSATA0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C862,863 VCKYCY0JB105K J AC 1 µF,6.3V
C864,865 VCKYCY1CB104K J AB 0.1 µF,16V
C866,867 VCKYCY1CB104K J AB 0.1 µF,16V [Except for Main

C869 VCSATE0JJ476M J AD 47 µF,6.3V,Electrolytic,Tantalum
C876 VCKYCY0JB105K J AC 1 µF,6.3V

PRICE
RANK

DESCRIPTION

PWB Version B,C]

RESISTORS

VRS-CY1JB000J J AA
VRS-CZ1JB000J J AB 0 ohm,Jumper,0.5×1.0mm
VRS-TV2AB000J J AA 0 ohm,Jumper,1.25×2mm,Green

R1,2 VRS-CY1JB103J J AA 10 kohm,1/16W
R101,102 VRS-CZ1JB223J J AB 22 kohms,1/16W

R111 VRS-CY1JB123J J AA 12 kohms,1/16W
R112 VRS-CZ1JB224J J AA 220 kohms,1/16W
R131 VRS-CZ1JB124D J AB 120 kohms,1/16W
R132 VRS-CZ1JB824D J AB 820 kohms,1/16W
R133 VRS-CZ1JB124D J AB 120 kohms,1/16W
R134 VRS-CZ1JB824D J AB 820 kohms,1/16W
R135 VRS-CZ1JB563D J AA 56 kohms,1/16W
R136 VRS-CZ1JB394D J AA 390 kohms,1/16W
R137 VRS-CZ1JB563D J AA 56 kohms,1/16W
R138 VRS-CZ1JB394D J AA 390 kohms,1/16W
R139 VRS-CY1JB393J J AA 39 kohms,1/16W
R140 VRS-CY1JB394J J AA 390 kohms,1/16W
R161 VRS-CY1JB122J J AA 1.2 kohms,1/16W
R204 VRS-CY1JB102J J AA 1 kohm,1/16W
R205 VRS-CY1JB273F J AA 27 kohms,1/16W
R206 VRS-CY1JB104F J AA 100 kohm,1/16W
R207 VRS-CY1JB681J J AA 680 ohms,1/16W
R222 VRS-CY1JB105J J AA 1 Mohm,1/16W
R250,251 VRS-CY1JB101J J AA 100 ohm,1/16W
R252 VRS-CY1JB154F J AA 150 kohms,1/16W
R253 VRS-CY1JB393F J AF 39 kohms,1/16W
R254 VRS-CY1JB223J J AA 22 kohms,1/16W
R255 VRS-CY1JB472J J AA 4.7 kohms,1/16W
R256 VRS-CY1JB563J J AA 56 kohms,1/16W
R257 VRS-CY1JB273F J AA 27 kohms,1/16W
R261 VRS-CY1JB102J J AA 1 kohm,1/16W

0 ohm,Jumper,0.8×1.55mm,Green

[Main PWB Version B,C,X]

NO.

R262 VRS-CY1JB124F J AA 120 kohms,1/16W
R266 VRS-CY1JB473F J AA 47 kohms,1/16W
R267 VRS-CY1JB103F J AA 10 kohm,1/16W
R269 VRS-CY1JB393F J AF 39 kohms,1/16W
R270,271 VRS-CY1JB683F J AA 68 kohms,1/16W
R272 VRS-CY1JB101J J AA 100 ohm,1/16W
R277 VRS-CY1JB393J J AA 39 kohms,1/16W
R279 VRS-CY1JB101J J AA 100 ohm,1/16W
R281 VRS-CY1JB223J J AA 22 kohms,1/16W
R282 VRS-CY1JB105J J AA 1 Mohm,1/16W
R283 VRS-CY1JB104J J AA 100 kohm,1/16W
R284 VRS-CY1JB394J J AA 390 kohms,1/16W
R285 VRS-CY1JB104J J AA 100 kohm,1/16W
R286 VRS-CY1JB222J J AA 2.2 kohms,1/16W
R287 VRS-CY1JB564J J AA 560 kohms,1/16W
R288 VRS-CY1JB473J J AA 47 kohms,1/16W
R291 VRS-CY1JB101J J AA 100 ohm,1/16W
R292 VRS-CY1JB104J J AA 100 kohm,1/16W
R293 VRS-CY1JB681J J AA 680 ohms,1/16W
R294,295 VRS-CY1JB104J J AA 100 kohm,1/16W
R296 VRS-CY1JB473J J AA 47 kohms,1/16W
R361 VRS-TQ2BB150J J AA 15 ohms,1/8W
R402 VRS-CY1JB104J J AA 100 kohm,1/16W
R403 VRS-CY1JB102J J AA 1 kohm,1/16W
R404 VRS-CY1JB104J J AA 100 kohm,1/16W
R405,406 VRS-CY1JB103J J AA 10 kohm,1/16W
R411 VRS-CY1JB104J J AA 100 kohm,1/16W
R412 VRS-CY1JB153J J AA 15 kohms,1/16W
R413~416 VRS-CY1JB102J J AA 1 kohm,1/16W
R422 VRS-CY1JB104J J AA 100 kohm,1/16W
R423 VRS-CY1JB223F J AA 22 kohms,1/16W
R424,425 VRS-CY1JB223J J AA 22 kohms,1/16W
R431 VRS-CY1JB334J J AA 330 kohms,1/16W
R451 VRS-CY1JB562J J AA 5.6 kohms,1/16W
R452 VRS-CY1JB822J J AA 8.2 kohms,1/16W
R453 VRS-CY1JB183J J AA 18 kohms,1/16W
R456 VRS-CY1JB562J J AA 5.6 kohms,1/16W
R457 VRS-CY1JB822J J AA 8.2 kohms,1/16W
R458 VRS-CY1JB183J J AA 18 kohms,1/16W
R460 VRS-CY1JB683J J AA 68 kohms,1/16W
R461 VRS-CY1JB104J J AA 100 kohm,1/16W
R462 VRS-CY1JB273J J AA 27 kohms,1/16W
R463 VRS-CY1JB104J J AA 100 kohm,1/16W
R464 VRS-CY1JB224J J AA 220 kohms,1/16W
R465 VRS-CY1JB104J J AA 100 kohm,1/16W
R466 VRS-CY1JB564J J AA 560 kohms,1/16W
R467 VRS-CY1JB223J J AA 22 kohms,1/16W
R481 VRS-CY1JB333F J AA 33 kohms,1/16W
R482,483 VRS-CY1JB183F J AA 18 kohms,1/16W
R501,502 VRS-CY1JB471J J AA 470 ohms,1/16W
R602 VRS-CY1JB124J J AA 120 kohms,1/16W
R603 VRS-CY1JB334J J AA 330 kohms,1/16W
R604 VRS-CY1JB104J J AA 100 kohm,1/16W
R605 VRS-CZ1JB105J J AB 1 Mohm,1/16W
R610,611 VRS-CY1JB1R0J J AA 1 ohm,1/16W
R701 VRS-CY1JB101J J AA 100 ohm,1/16W
R702 VRS-CY1JB220J J AA 22 ohms,1/16W
R703 VRS-CY1JB104J J AA 100 kohm,1/16W
R711,712 VRS-CY1JB682J J AA 6.8 kohms,1/16W
R713,714 VRS-CY1JB103J J AA 10 kohm,1/16W
R715,716 VRS-CY1JB104J J AA 100 kohm,1/16W
R717,718 VRS-CY1JB102J J AA 1 kohm,1/16W
R719,720 VRS-CY1JB682J J AA 6.8 kohms,1/16W
R728A VRS-CY1JB103J J AA 10 kohm,1/16W
R754 VRS-CY1JB154J J AA 150 kohms,1/16W
R757 VRS-CY1JB222J J AA 2.2 kohms,1/16W
R758 VRS-CY1JB101J J AA 100 ohm,1/16W
R761 VRS-CY1JB154J J AA 150 kohms,1/16W
R762 VRS-CY1JB104J J AA 100 kohm,1/16W
R765,766 VRS-CY1JB150J J AB 15 ohms,1/16W
R767,768 VRS-CY1JB4R7J J AA 4.7 ohms,1/16W
R802 VRS-CY1JB561J J AA 560 ohms,1/16W
R803 VRS-CY1JB122J J AA 1.2 kohms,1/16W
R806 VRS-CY1JB563J J AA 56 kohms,1/16W
R807 VRS-CY1JB223J J AA 22 kohms,1/16W
R808 VRS-TV2AB1R0F J AB 1 ohm,1/10W
R809 VRS-TV2AB1R0J J AA 1 ohm,1/10W
R810 VRS-TV2AB1R0F J AB 1 ohm,1/10W
R811 VRS-TV2AB1R0J J AA 1 ohm,1/10W
R812~815 VRS-CY1JB103F J AA 10 kohm,1/16W
R816 VRS-CY1JB152J J AA 1.5 kohms,1/16W
R818 VRS-CY1JB564J J AA 560 kohms,1/16W

PRICE

RANK

DESCRIPTIONPARTS CODE

– 2 –

MD-MT180

NO.

R819 VRS-CY1JB223J J AA 22 kohms,1/16W
R831,832 VRS-CY1JB184F J AA 180 kohms,1/16W
R844 VRS-CY1JB470J J AA 47 ohms,1/16W
R850 VRS-CY1JB104J J AA 100 kohm,1/16W
R853 VRS-CY1JB274J J AA 270 kohms,1/16W
R854 VRS-CY1JB103J J AA 10 kohm,1/16W
R855 VRS-CY1JB394F J AA 390 kohms,1/16W
R856 VRS-CY1JB335J J AA 3.3 Mohms,1/16W
R857 VRS-CY1JB334F J AA 330 kohms,1/16W
R871 VRS-CY1JB104J J AA 100 kohm,1/16W
R891 VRS-CY1JB473J J AA 47 kohms,1/16W
R892 VRS-CY1JB103J J AA 10 kohm,1/16W
R920 VRS-CY1JB104J J AA 100 kohm,1/16W

PART CODE

PRICE
RANK

DESCRIPTION

OTHER CIRCUITRY PARTS

CN101 QCNCW046XAWZZ J AM Socket,22Pin
CN451 QCNCW804MAFZZ J AD Socket,12Pin
CN482 QCNCW804GAFZZ J AD Socket,7Pin
CN601 QCNCW716LAFZZ J AF Socket,11Pin

1 F841 QFS-L401AAFNZ J AE

J701 VHLGP1FD210-1 J AM Jack,Optical/Line In
J703A QJAKM0021AWZZ J AD Jack,Headphones
J801 QJAKC0007AWZZ J AF Jack,DC IN,5V
M901 RMOTV0044AWZZ J AW Motor Ass’y [Spindle]
M902 RMOTS0002AWZZ J AT Motor Ass’y [Sled]
M903 RMOTV0033AWZZ J AW Motor Ass’y [Lift]

1 PS801 VHHSMDM110V-1 J AK Conductive Restn Switch,1.1A

SW401 QSW-M0001AWZZ J AD Switch,Push Type [Eject]
SW403 QSW-M0172AFZZ J AD Switch,Push Type [Lid Open]
SW601 QSW-M0170AFZZ J AD Switch,Push Type [Disc Protect]

Square Tip Type Fuse,0.4A,DC60V

MD MECHANISM PARTS

1 1 92LHPM280 J BT Optical Pickup Unit

2 LANGZ0053AWFW J AD Bracket,Left
3 LANGZ0052AWFW J AC Bracket,Right
4 LCHSM0148AWM1 J AG Main Chassis Ass’y
5 LHLDX3016AWM1 J AK Cartridge Holder Ass’y
6 MLEVF0073AWFW J AC Lever,Lift
7 MLEVF0074AWFW J AC Lever,Eject
8 MLEVF0075AWFW J AC Lever,Cancel
9 MLEVF0102AWFW J AC Lift Link Lever
10 MLEVF0103AWFW J AC Lift Move Lever
11 MLEVF0104AWFW J AC Protect Lever,Eject
12 MSPRP0044AWFJ J AB Spring,Thrust
13 MSPRP0067AWFJ J AB Spring,Drive Grip
14 MSPRT0054AWFJ J AB Spring,Eject Lever
15 NBRGC0004AWZZ J AB Metal
16 NGERH0096AWZZ J AC Gear,Drive
17 NGERH0125AWZZ J AB Drive Wheel
18 NSFTD0011AWZZ J AG Drive Screw
19 QPWBH0023AWZZ J AK Mechanism Flexible PWB Ass’y
20 RCILH0003AWM1 J AT Magnetic Head Ass’y
501 LX-BZ0040AWZZ J AB Screw,ø1.4×1.5mm
502 LX-BZ0059AWZZ J AB Screw,ø1.4×1.8mm
503 LX-JZ0027AWZZ J AA Screw,ø1.7×3.5mm
504 LX-JZ0034AWZZ J AA Screw,ø1.4×5mm
505 LX-JZ0167AFZZ J AB Screw,ø1.4×3.0mm
506 LX-WZ9290AFZZ J AA Washer,ø0.8×ø2.4×0.2mm
M901 RMOTV0044AWZZ J AW Motor Ass’y [Spindle]
M902 RMOTS0002AWZZ J AT Motor Ass’y [Sled]
M903 RMOTV0033AWZZ J AW Motor Ass’y [Lift]

NO. PARTS CODE

215 MLEVP0120AWZZ J AC Lever,Detect
216 MSPRD0174AWFJ J AB Spring,Detect Lever
217 MSPRT0068AWFJ J AB Spring,Eject Lever
218 PCUSU0008AWZZ J AB Cushion,LCD Unit
219 PCUSZ0040AWZZ J AB Cushion,Battery
220 PSHEF0026AWZZ J AA Felt
221 PSHET0086AWZZ J AH Shield Sheet,A
222 PSHET0087AWZZ J AB Insulation Sheet,Battery
223 PSHET0098AWZZ J AC Shield Sheet,B
224 PSHEZ0115AWZZ J AA Tape
225 PSHEZ0137AWZZ J AC Tape,Window
226 QTANB9028AWFQ J AC Terminal,Charging (+,-)
227 QTANB9043AWFQ J AE Terminal,Battery (-)
228 RUNTK0018AWZZ J AN Key Switch Flexible PWB Ass’y.
229 RUNTZ0046AWZZ J BA LCD Unit Ass’y.
230 PSHET0103AWZZ J Sheet,Knob
231 PSHET0105AWZZ J Sheet,LCD
601 LX-BZ0048AWFN J AC Screw,ø1.4×2.5mm
603 LX-BZ0063AWFC J AB Screw,ø1.4×2.5mm
604 LX-BZ0960AFZZ J AB Screw,ø1.4×1.5mm
605 LX-BZ1008AFFC J AB Screw,ø1.4×2mm
606 LX-CZ0010AWFC J AB Screw,ø1.4×4mm
607 LX-CZ0011AWFD J AB Screw,ø1.4×2mm
608 LX-CZ0016AWFN J AB Screw,ø1.4×2.5mm
609 LX-CZ0019AWFF J AB Screw,ø1.4×3mm

PRICE

RANK

DESCRIPTION

ACCESSORIES

GCASZ0002AWSA J AL Battery Case
PCOVW1015AWZZ J AC Battery Carrying Case

1 RADPA3059AWZZ J AX AC Adapter

QCNWG0029AWZZ J AK Connecting Cord,RCA Type
RPHOH0011AWZZ J AT Earphones

TINSE0411AWZZ J AG Operation Manual
TINSE0412AWZZ J AF Quick Guide
UBATM0009AWSA J AY Rechargeable Battery

P.W.B. ASSEMBLY (Not Replacement Item)

PWB-A 92LPWB3804MDSS J — Main

OTHER SERVICE PARTS

UDSKM0001AFZZ J AZ Recording Mini Disc
88GMMD-110 J BV High Reflection Disc MMD-110

88GMMD-212 J BU Low Reflection Disc MMD-212
88GMMD-213A J BT Low Reflection Disc MMD-213A

(TEAC Test MD)
(TEAC Test MD)
(TEAC Test MD)

CABINET PARTS

201 GCABA1258AWSA J AN Top Cabinet
202 GCABB1272AWSA J AL Bottom Cabinet
203 GCOVA1414AWSB J AD Cover,Terminal
204 GDORB0005AWSB J AD Door,Battery
205 HDECQ0820AWSA J AK Decoration Plate,Window
206 JKNBZ0860AWSA J AM Button,Operation
207 JKNBZ0861AWSB J AC Knob,Eject
208 LANGT0127AWFW J AE Bracket,Key Switch
209 LANGT0128AWM1 J AG Bracket,Ass’y.,Mechanism
210 LANGT0129AWFW J AD Arm Bracket,L
211 LANGZ0057AWM1 J AH Terminal Ass’y.,Battery (+)
212 LBOSZ0002AWZZ J AC Boss
213 LHLDZ1406AWZZ J AB Holder,Battery Terminal (-)
214 MLEVP0119AWZZ J AC Lever,Eject

– 3 –

502x2

MD-MT180

A

20

501

13

B

1

18

505x3

M901

503

12

19

15

C

503

3

17

501x2

M903

506

D

9

M902

16

4

E

2

10

11

F

G

5

504

8

7

H

6

14

1

23456

Figure 4 MD MECHANISM EXPLODED VIEW

– 4 –

MD-MT180

A

205

MD
MECHANISM

225

B

603x2

210

209

201

222

605

604

C

215

206

216

213

220

212

604

226x2

219

D

231

229

227

PWB-A

224

218

228

E

223

230

607

601

601

211

208

F

221

214

217

203

608

G

609

603

603

608

606x2

202

H

1

23456

Figure 5 CABINET EXPLODED VIEW

207

606

– 5 –

204

PACKING OF THE SET (FOR U.S.A. ONLY)

Pad,Operation Manual
SPAKZ0490AWZZ

Quick Guide

Operation Manual

MD-MT180

Earphones

Connecting Cord,
RCA Type

Battery Case

Bag,Polyethylene
SSAKH0033AWZZ

Label,SER.No.,Set
TLABN0092AWZZ

Packing Case

SPAKC1341AWZZ

Battery Carring Case

Rechargeable Battery

AC Adaptor

Pad,Unit
SPAKA0336AWZZ

Label,Bar Code

TLABR1254AWZZ

Label,SER.No.,Packing Case
TLABN0190AWZZ

– 6 –

: Not Replacement Item

MD-MT180

–MEMO–

–MEMO–

MD-MT180

MD-MT180

COPYRIGHT 2002 BY SHARP CORPORATION

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SHARP CORPORATION
AV Systems Group
Audio Systems Division
Higashihiroshima, Hiroshima 739-0192, Japan

Printed in Japan

A0204-667SS•HA•M

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