Sharp MD-MT877S Service Manual

MD-MT877/MD-MT877C

SERVICE MANUAL

No. S3118MDMT877/

PORTABLE MINIDISC RECORDER

MD-MT877(S)

MODEL MD-MT877C(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 .......................................................................................................................................................... 5

DISASSEMBLY.................................................................................................................................................................... 10

REMOVING AND REINSTALLING THE MAIN PARTS....................................................................................................... 11

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

NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 28

TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 28

BLOCK DIAGRAM ............................................................................................................................................................... 29

SCHEMATIC DIAGRAM ...................................................................................................................................................... 30

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

VOLTAGE ............................................................................................................................................................................ 36

WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 37

TROUBLESHOOTING ......................................................................................................................................................... 38

FUNCTION TABLE OF IC.................................................................................................................................................... 41

PARTS GUIDE/EXPLODED VIEW
PACKING OF THE SET (MD-MT877(S) FOR U.S.A. ONLY)

SHARP CORPORATION

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

MD-MT877/MD-MT877C

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

SPECIFICATIONS

Power source DC 1.2V: Rechargeable Nickel-Metal Hydride battery (AD-N55BT) x 1

DC 5V: AC adaptor (AC 120V, 60 Hz)
DC 1.5V: Commercially available, “AA” size (LR6), alkaline battery x 1
DC 1.5V: Separately available car adaptor, AD-CA55X (for cars with a 12-24V DC negative ground electrical sys-

tem) (Used with separately available plug adaptor (AD-M66PA))

Power consumption 7 W (AC adaptor)
Output power RMS; 10 mW (5 mW + 5 mW) (0.2% T.H.D.)
Charging time Approx. 3.5 hours
Input sensitivity MIC H: reference input level 0.25 mV input impedance 10 k ohms

MIC L: reference input level 2.5 mV input impedance 10 k ohms
LINE: reference input level 100 mV input impedance 20 k ohms

Output level Earphones:maximum output level 5 mW + 5 mW load impedance 32 ohms

LINE: specified output 250 mV (-12 dB) load impedance 10 k ohms

Dimensions Width: 2-27/32” (71.9 mm) Height: 11/16” (16.8 mm) Depth: 3-1/8” (78.7 mm)
Weight 0.29 lbs. (131 g) with rechargeable battery

Input jack Line/optical digital, microphone (powered by the main unit)
Output jack Earphones (impedance: 32 ohms)/remote control unit
Type Portable MiniDisc recorder
Signal readout Non-contact, 3-beam semiconductor laser pickup
Audio channels Stereo 2 channels/monaural (long-play mode) 1 channel
Frequency response

20 – 20,000 Hz (± 3 dB)

Rotation speed Approx. 400 – 1,350 rpm
Error correction ACIRC (Advanced Cross Interleave Reed-Solomon Code)
Coding ATRAC/ATRAC3 (Adaptive TRansform Acoustic Coding), 24-bit computed type
Recording method Magnetic modulation overwrite method
Sampling frequency

44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz, and then recorded.)

Wow and flutter Unmeasurable (less than ±0.001% W. peak)

Battery life

Stereo 2 times long 4 times long

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

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

When using one, commercially avail­able, high capacity, “AA” size (LR6), al­kaline battery with the rechargeable bat­tery (fully charged)

● The above values are the standard values when the unit is operated hori­zontally and charged at an ambient temperature of 77°F (25°C). (The
operable duration with the rechargeable battery will be shorter when the
unit is carried around.)

● The volume level is set at “VOL 15”.

● The LED is set at “LIGHT OFF”.

Continuous Continuous Continuous Continuous Continuous Continuous
recording: play: recording: play: recording: play:
Approx. Approx. Approx. Approx. Approx. Approx.

6.5 hours 12 hours 9 hours 13.5 hours 11.5 hours 15 hours
Continuous Continuous Continuous Continuous Continuous Continuous

recording: play: recording: play: recording: play:
Approx. Approx. Approx. Approx. Approx. Approx.
6 hours 16 hours 10 hours 19.5 hours 13 hours 22 hours

Continuous Continuous Continuous Continuous Continuous Continuous
recording: play: recording: play: recording: play:
Approx. Approx. Approx. Approx. Approx. Approx.
15 hours 29 hours 22 hours 33 hours 30 hours 40 hours

● Operable duration with a commercially available battery varies depend­ing on its maker, type, and conditions of use.

● “Fully charged” means that the charging is complete after approximately

3.5 hours since the remaining amount of the battery is reduced to “
(1 bar).

”

Specifications for this model are subject to change without prior
notice

– 2 –

NAMES OF P ARTS

MD-MT877/MD-MT877C

Main unit

1. Record/Track Mark Button

2. Mode Button

3. Volume/Cursor/Fast Forward/Fast Reverse/
Recording Level/Name Select Button

4. Stop/Power Off/Hold Button

5. Open Lever

6. Display/Character Select Button

7. Edit/Auto Mark/Time Mark Button

8. Play/Pause Button

9. Enter/Fast Play/Synchro Button

10. Bass/Delete Button

11. Rechargeable Battery Cover

12. Handstrap Holder

13. Optical/Line Input Jack

14. Microphone Input Jack

15.

Remote Control/Earphones/Line Output Jack

5

1

6

2

3

7

4

8

9

10

11

Main unit display panel

1. Level Meter

02. Record Indicator

03. Synchro Recording Indicator

04. Operation Indicator

05. Long-play/Recording Mode Indicator

6. Character/Time Information Indicator

7. Repeat Indicator

8. Battery Indicator

9. Random Indicator

10. Track Number Indicator

11. TOC Indicator

12. Disc Name Indicator

3-color LED

Various modes are indicated with three colors of lights.

Charging Light
Refresh Extinguishing starting with orange light

Playback Flashing the color of the activated play-
Recording Flashing the color of the activated re-

Fast Forward
Fast Reverse Flashing starting with orange light.
Volume (+) Lighting starting with yellow-green light.
Volume (–) Extinguishing instantly starting with or-

TOC Reading: flashing at random.

ing starting with yellow-green light.
after all the lights are lit.
back mode.
cording mode.

Flashing starting with yellow-green light.

ange light after all the lights are lit.

1
2
3
4
5
6

12

Yellow-

green

Blue

15

14

13

7
8
9
10
11
12

Orange

– 3 –

MD-MT877/MD-MT877C

Remote control unit

1. Earphones Jack

2. Fast Forward/Fast Reverse Button

3. Display Button

4. Play Mode Button

5. Sound/Track Mark Button

6. Stop/Power Off Button

7. Play/Pause Button

8. Volume Button

9. Hold Switch

Remote control display panel

1. Record Indicator

02. Track Number Indicator

03. Operation Indicator

04. Character/Time Information Indicator

05. Battery Indicator

06. Random Indicator

07. Synchro Recording Indicator

08. Total Track Number Indicator

09. Long-play/Recording Mode Indicator

10. Repeat Indicator

1

6

2345

7

8

123

7

8

4

9

56

9

10

Battery charger

1. Remote Control Holder
(You can hang the remote control on it.)

2. Lock Detector

3. Hook For Fixing The Main Unit

4. Charge/Operation Switch

5. Stand

6. AC Adaptor Connecting Jack

1

2

3

CHARGE

OPERATION

4
5
6

– 4 –

MD-MT877/MD-MT877C

OPERATION MANUAL

Using with the Rechargeable Battery

Charging

Do not force the
battery cover
open too far.

AC 120V
60Hz

Charge
mode

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.

2

Move the Charge/Operation switch to
charge mode.

3

Place the portable MD into the battery
charger and connect the AC adaptor.

●

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.

To the DC IN
5V jack

Checking Displays

Checking the remaining amount of
battery level

The remaining amount of battery level is shown
by the battery indicator ( ) during operation.

How to read the battery indicator

When the battery
level is high

● When the battery is completely discharged, the battery

indicator will flash. Recharge the battery or replace the
alkaline battery with a new one.

● When the battery has run completely out, “BATT EMPTY

(LoBA TT)” will appear. Then, the power will be discon­nected automatically.

Notes:

● If you use the battery which you stopped charging half-

way, “
tery is completely charged.

● The battery indicator will not correctly display the remain-

ing capacity for approximately 20 seconds after the power
has been turned on.

● When the AC adaptor or a separately available car adap-

tor is used, the battery indicator will not be shown.

● The number of bars shown in the battery indicator may

increase or decrease, depending on the operation be­ing performed. This is normal.

” may appear. It does not mean that the bat-

When the battery
low is very low

– 5 –

MD-MT877/MD-MT877C

Error Messages

ERROR MESSAGES

BATT EMPTY

(LoBATT)

BLANK MD

(BLANK)

Can’t COPY

(Can’tC)

Can’t EDIT

(Can’tE)

Can’t READ *

(Can’tS)
(Can’tT)
(Can’tU)

Can’t REC

(Can’tR)

Can’t STAMP
Can’t WRITE

(Can’tW)

CHARGEmode

DEFECT

(DEFECT)

DISC FULL
Er-MD **

(ErMD*)

HOLD

(HOLD)

LOCKED

(Can’tLOCK)

MEANING

● The battery is run down.

● Nothing is recorded.

● You tried to record from a copy prohibited

MiniDisc.

● A track cannot be edited.

● The disc data cannot be read because the disc

is damaged.

● Recording cannot be performed correctly due to
vibration or shock.

● Stamp function does not work.

● Cannot save the TOC information correctly to a

MiniDisc. (A large portion of the disc has been
damaged.)

● The Charge/Operation switch is not set to the
operation mode when using this unit with the AC
adaptor.

● The disc is scratched.

● The disc is out of recording space.

● The microprocessor has reported a system fault

and the unit is out of order.

● The unit is in the hold mode.

● You removed a MiniDisc while recording or

editing.

REMEDY

● Charge the rechargeable battery or replace the alka­line battery (or use the AC adaptor for power).

● Replace the disc with a recorded disc.

●

Record using the analog cable. (MD-MT877(S))
Record using the analogue cable. (MD-MT877C(S))

●

● Change the stop position of the track and then edit it.

● Reload the disc.

● Replace it with another recorded disc.

● Re-record or replace it with another recordable disc.

● Check the number of tracks.

● Replace the disc with another recordable disc.

● Set the Charge/Operation switch to the operation mode.

● If the sound you hear is not right, record again.

● Replace the disc with another recordable disc.

● Replace it with another recordable disc.

● To have it repaired, go to the distributor where you pur-

chased the unit.

● Return the HOLD switch to its original position.

● Turn off the power and remove the MiniDisc.

Error Messages : continued

ERROR MESSAGES

NO DISC
NO SIGNAL

(noSIG.)

PLAY MD

(PLAYmd)

POWER ?
PROTECTED

SORRY

(Sorry)

TEMP OVER

(TEMP!)

TOC FORM **

(Tform**)

TOC FULL
Tr. Protect

? DISC

(? DISC)

( ) : Error messages seen on the remote control.
Number or symbol appears in * position.

● A disc has not been loaded.

● Poor connection of the digital cable.

● No output signal comes out from the connected

unit to playback.

● The input signal has improper sampling fre­quency.

● You recorded on a playback-only disc.

● The battery charger is defective.

The write protection tab of a MiniDisc is set to

●

the protected position.

●

You tried to record on a playback-only disc.

● Since a track number is currently being located
or updated, the unit cannot accept your com­mand.

● The temperature is too high.

● There is an error in the recording signal.

● There is no space left for recording character

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

● The track has been protected from being erased.

● A disc which contains data other than music was

played.

● There is an error in the signal recorded on the
disc.

● Stamping is not possible.

MEANING

● Load a disc.

● Connect the digital cable securely.

●

If the portable CD player has a function to prevent sound
skips, deactivate it.

● Playback with the connected unit.

●

Replace it with a recordable disc.

● To have it repaired, go to the distributor where you
purchased the unit.
Move the write protection tab back to its original position.

●

● Replace it with a recordable MiniDisc.

● Wait for a while and try the operation again.

● Turn off the power, and wait for a while.

● Erase all of the tracks, and then record again.

● Replace it with another recordable disc.

● Edit the track with the device on which it was recorded.

● A disc which contains non-music data cannot be played.

● Replace it with another recorded disc.

● Retry.

REMEDY

– 6 –

MD-MT877/MD-MT877C

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

MiniDisc System Limitations

SYMPTOM

“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.

LIMITATIONS

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.

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

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 without calling a service technician.
If something seems to be wrong with this product, check the following before calling your authorized SHARP dealer or
service center.

PROBLEM CAUSE

The unit does not
turn on.

No sound is
heard from the
earphones.

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

Some sounds
are skipped.

●

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 by static electric­ity?

●

Is the volume set too low?

●

Is the remote control unit or the ear­phones plugged in?

●

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

●

Is the unit in the hold mode?

●

Is the battery exhausted?

●

Is the remote control unit plug or the
earphones plug inserted firmly?

●

Is the battery exhausted?

●

Is the unit being subjected to exces­sive vibration?

PROBLEM CAUSE

The MiniDisc can­not be ejected.

Recording and
editing are im­possible.

The battery cannot
be charged.

Nothing appears
on the remote
control display.

●

Has the track number or character
information been updated on the
disc yet?

●

Is the unit in the recording or edit­ing mode?

●

Is the MiniDisc protected against
accidental erasure?

●

Is the unit connected properly to the
other equipment?

●

Is the AC adaptor unplugged or did a
power failure occur while recording or
editing?

●

Is the unit in the hold mode?

●

Is an optical signal being output from
the stereo system?
Read the operation manual for the
stereo system.

●

Is the select switch for charging/
operation set on the charging side?

●

Is the jack clean?

●

Is the remote control display set to
“LIGHT OFF”?

– 7 –

MD-MT877/MD-MT877C

Preparation for use

Preparación para su utilización

The unit does not work if the • / –HOLD button is set to HOLD.

Este aparato no funciona si el botón • / –HOLD está puesto en HOLD.

Hold

Retención

Released

Liberación

CAUTION:

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

PRECAUCIÓN:

No se recomienda ponerse un minidisco en el bolsillo
trasero del pantalón, porque podría dañarlo al sentarse.

For operations

Para operaciones

Move it to operation mode when playing back or recording.

Muévalo a la posición del modo de operación para la reproducción o grabación.

Operation mode

Modo de operación

Press the • / –HOLD button for 2 seconds or more.

Pulse el botón • /–

HOLD

durante 2 o más segundos.

1

Insert a MiniDisc

Inserte un minidisco

2

Connect the AC adaptor

Conecte el adaptador de CA

44

222

1

1

Slide the OPEN lever to re­lease the compartment door.

Deslice la palanca OPEN para
abrir la puerta del comparti­miento.

2

Lift it up.

Levantelo.

Recordable

Para poder
grabar

Recording
prevented

Para no poder
grabar

Insert according to the direction of the arrow.

Insértelo de acuerdo con la dirección de la flecha.

33

3

Insert a MiniDisc as shown.

Inserte un minidisco como se
muestra.

4

Close the compartment.

Cierre el compartimiento.

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

Cuando desee grabar en un
minidisco, compruebe que la
lengüeta de protección contra
borrado esté colocada en la posición
para "poder grabar".

AC 120V, 60 Hz

120V CA, 60Hz

RELEASE

LOCK

To the DC IN 5V jack

A la toma DC IN 5V

1

Move the Charge/Operation
switch to Charge mode (RE­LEASE).

Mueva el selector de carga/
operación al modo de carga

(RELEASE).

2

Insert the portable MD into
the battery charger.

Inserte el MD portátil en el
cargador de baterías.

Before using the unit with a rechargeable battery, the battery has to be charged. Refer
to “Using with the rechargeable battery”.

Antes de emplear el aparato con una batería recargable, se deberá cargar la
batería. Consulte el apartado de "Empleo con la batería recargable".

Insert securely, all the way in.

Insértelo con seguridad a fondo.

3

Move the Charge/Operation
switch to Operation mode
(LOCK).

Mueva el selector de carga/
operación al modo de operación

(LOCK)

4

Plug the AC adaptor.

Enchufe el adaptador de CA.

To an AC outlet

A un tomacorriente
de CA

.

3

Connection

Conexión

LINE OUT

LEFTRIGHT

To a stereo system with
jacks (See left. Analog connection)

Note:

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

A un sistema estéreo provisto de tomas de salida de
línea "LINE OUT" o de salida de audio "AUDIO OUT"
(Vea a la izquierda, Conexión analógica)

Nota:

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

OPTICAL/

LINE IN

Red: To Right
Rojo: A la

derecha

White: To Left
Blanco: A la

izquierda

“LINE OUT” or “AUDIO OUT”

– 8 –

Recording

Grabación

Check that the unit is connected to the stereo system.

Compruebe que el aparato esté conectado al sistema estéreo.

MD-MT877/MD-MT877C

4

Press the PAUSE button on the stereo system to enter the play­back pause mode at the point you wish to start recording.

Pulse el botón PAUSE del sistema estéreo para entrar en el modo de pausa
de reproducción en el punto en el que desee iniciar la grabación.

5

Press the MODE button repeatedly to select the recording mode.

Pulse repetidamente el botón MODE para seleccionar el modo de grabación.

6

Press the button to start recording.

Pulse el botón para iniciar la grabación.

7

Begin playback on the stereo system, the output will be recorded.

Inicie la reproducción del sistema estéreo, y se grabará la salida.

1

Press the REC button.

Pulse el botón REC.

2

Begin playback on the stereo system connected to this unit.

Inicie la reproducción en el sistema estéreo conectado a este aparato.

3

Press the or button

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 o para ajustar el nivel de grabación.

Ajuste el nivel de grabación para que el volumen de sonido máximo de la fuente
produzca una indicación de entre –4 dB y 0 dB.

Level meter indicator

Indicador del medidor de nivel

to adjust the recording level.

0dB
4dB

Playing

Reproducción

To stop recording

Press the • / :OFF button.

When recording stops, “TOC” appears
(Table Of Contents). While “T OC” ap­pears, the MiniDisc recorded contents
have not yet been updated.

Para detener la grabación

Pulse el botón • /:OFF.

Cuando se detenga la grabación,
aparecerá “TOC” (índice). Mientras
aparece “TOC”, aún no se habrá
actualizado el contenido grabado en el MD.

TOC display

Visualización
TOC

To update the recorded contents
of the MiniDisc

Press the • / :OFF button while 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 en el modo de
parada.

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

1

Insert the earphones plug firmly into the earphones jack on
the remote control unit.

Inserte firmemente la clavija de los auriculares en la toma de auriculares del
controlador remoto.

2

Plug the remote control into the jack on the unit.

Enchufe el controlador remoto a la toma del aparato.

3

Insert a MiniDisc.

Inserte un MD

4

Press the button.

Pulse el botón .

To stop playback

Press the • / :OFF button (Remote
control: press the button).

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

Para detener la reproducción

Pulse el botón • /:OFF. (Controlador
remoto: pulse el botón .)

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

– 9 –

MD-MT877/MD-MT877C

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

PROCEDURE

1 Bottom Cabinet 1. Screw .....................(A1) x5 10-1

2 Top Cabinet 1. Open the Top cabinet.

2. Screw ..................... (B1) x4

3. Flexible PWB..........(B2) x1 10-2

3 Main PWB 1. Open the rechargeable

battery compartment of the
direction indicated by arrows.

2. Screw .................... (C1) x1

3. Flexible PWB......... (C2) x2

4 MD Mechanism 1. Pull the main frame to the A 10-3

direction and remove the MD

mechanism upward.

2. Screw .................... (D1) x1

5 LCD PWB 1.

Screw

2.

......................(E1) x6 10-4

Hook .......................

(E2) x4

FIGURE

10-1

10-2

(A1) x 1
ø 1.4 x 2 mm

Bottom Cabinet

Battery
Cover

2

1

(B1) x 2
ø 1.4 x 2 mm

OPEN

OPEN

EJECT
Knob

(A1) x 1
ø 1.4 x 2 mm

(C2) x 1(1*)

pull

Top Cabinet

Figure 10-1

Main PWB

pull

OPEN

(A1) x 2
ø 1.4 x 2 mm

(B1) x 2
ø 1.4 x 2 mm

OPENOPEN

(A1) x 1
ø 1.4 x 2 mm

(B2) x 1

(C2) x 1

(C1) x 1
ø 1.4 x 2.5 mm

Top Cabinet

(E1) x 6
ø 1.4 x 2 mm

Figure 10-4

(E2) x 4

Caution:

Main Frame

Carefully handle the main PWB and flexible PWB. After removing the
flexible PWB (1*) 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 10-2

MD Mechanism

LCD PWB

OPEN

A

Main Frame

(D1) x 1
ø 1.4 x 1.5 mm

Figure 10-3

– 10 –

REMOVING AND REINSTALLING THE MAIN PARTS

MD Mechanism

(B2) x 1
ø 1.4 x 3.8 mm

Solder Joints
(B1) x 2

Lift Motor

Remove the mechanism according to the disassembling meth­ods 1 to 4. (See Page 10.)

MD-MT877/MD-MT877C

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

1. Remove the solder joints (A1) x 4 of flexible PWB.

2. Remove the screws (A2) x 3 pcs., and remove the spindle
motor.

How to remove the lift motor (See Fig. 11-2.)

1. Remove the solder joints (B1) x 2 of lift motor lead wire.

2. Remove the screw (B2) 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 remove the sled motor (See Fig. 11-3.)

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

gear (C2) x 1 pc.

2. Remove the screws (C3) x 2 pcs.

3. Remove the solder joints (C4) x 3 of flexible PWB., and

remove the sled motor.

Note:

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

How to remove the magnetic head (See Fig. 11-4.)

1. Remove the screws (D1) x 2 pcs. of the magnetic head and

the optical pickup, and remove the solder joints (D2) x 2 pcs.
of the head flexible plate.

Note:

Mount carefully so as not to damage the magnetic head.

(A2) x 3
ø 1.4 x 3 mm

Spindle Motor

Solder joints
(A1) x 4

MD Mechanism

Figure 11-1

How to reinstall the optical pickup
(See Fig. 11-4.)

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

2. Remove the screw (E2) x 1 pc. to remove the thrust

spring, and remove the drive screw and the optical
pickup from MD mechanism.
Then, remove the drive screw from the optical pickup.

(E1) x 1
ø 1.4 x 1.8 mm

Drive

Grip Spring

Screw

Optical Pickup

Magnetic
head

(D1) x 2
ø1.4 x 1.8 mm

(D2)x2
Solder Joints

Figure 11-4

(E2) x 1

ø 1.7 x 3.5 mm

Thrust
Spring

MD Mechanism

Figure 11-2

(C3) x 2

ø 1.4 x 1.2 mm
Sled
Motor

(C1) x 1

(C2) x 1

(C4) x 3
Solder
Joints

MD Mechanism

Figure 11-3

– 11 –

MD-MT877/MD-MT877C

Test disc

ADJUSTMENT

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

Type

1 High reflection disc

2 Low reflection disc

3 Low reflection disc

Test disc Parts No.

MMD-110
(TEAC Test MD)

MMD-213A
(TEAC Test MD)

Recording
minidisc disc

88GMMD-110

88GMMD-213A

UDSKM0001AFZZ

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

recorded.

Entering the TEST mode

1. Setting at port (in standby state, disc-free state or power
nonconnected state)

(1) Set the port as follows.
TEST1 : "Low"
TEST0 : "High"
(2) Press the PLAY button in the standby state (it is allowed to

close the disc lid or to connect the power supply).

(3) Test Mode STOP [ T E S T _ ]

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

Test mode: Perform it with the remote control.
(1) Press and hold the "PLAY MODE" button on the remote control

and press the "PLAY" button.
(2) Release only the "PLAY MODE" button.
(3) Press and hold only the "PLAY" button and press the "VOL-

UME–" button.
(4) Normal mode setting initialization (BASS setting, VOLUME

setting, etc.)
(5) Test Mode STOP [ T E S T _ ]
(6) Press "VOLUME+" to check the microcomputer version.
(7) Press "VOLUME–" to light up all the LCDs.

Leaving the TEST mode

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

indicating state or whole LCD lighting state.
(2) EEPROM rewrite-enable area updating.
(3) Change to standby state

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

• 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 100 steps 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.

• Seeing the displayed adjustment value, perform

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

Shipping setting method

(1)

Insert the rechargeable battery. Do not close the compartment.

(2) Close the battery lid twice in succession while pressing the

VOLUME– button and the PLAY button on the main unit at the
same time. (Turn on and off the power twice)

(3) Make sure the display changes from [INIT] to [BYE OK].

6. MANUAL 2 Mode

7. ERROR INFORMATION
Mode • Error information is initialized

8. NORMAL Mode

9. EEPROM Mode

• Temperature is displayed.

• Seeing the displayed adjustment value, perform
ATT (attenuator) manual adjustment.

• Continuous playback is performed
(error rate display, jump test).

• 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 performed.

• Factors of digital servo are changed manually.

• 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.

– 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.

• 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.

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. MANUAL1 Mode

• Adjustment item to be made in AUTO1 mode is performed manually.

• When the VOLUME+ button is pressed during adjustment, the sett­ing increases, and the new setting is output.

• When the VOLUME– button is pressed during adjustment, the sett­ing decreases and the new setting is output.

• If the VOLUME+/– button is held down, the setting changes continu­ously with 100 ms cycle.

*In this operation, the setting change is performed for each digit. The

digit is changed by pressing the MODE button.

• If the setting is within the allowable range, the RANDOM display
lights.

• When the STOP button is pressed during MANUAL1 menu or mea­surement or adjustment, the state is changed to the TEST mode
stop state.

4. MANUAL2 Mode

• Adjustment item to be made in AUTO2 mode is performed manually.

• When the VOLUME+ button is pressed during adjustment, the sett­ing increases, and the new setting is output.

• When the VOLUME– button is pressed during adjustment, the sett­ing decreases and the new setting is output.

• If the VOLUME+/– button is held down, the setting changes continu­ously with 100 ms cycle.

*In this operation, the setting change is performed for each digit. The

digit is changed by pressing the MODE button.

• If the setting is within the allowable range, the RANDOM display
lights.

• When the STOP button is pressed during MANUAL2 menu or mea­surement or adjustment, the state is changed to the TEST mode
stop state.

• When the PLAY button is pressed in B-ATT set state, the mode is
changed to the continuous playback mode.

• As for operation during continuous playback refer to "TEST-PLAY
mode explanation".

MD-MT877/MD-MT877C

5. 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 DISP button is pressed in the TEST-PLAY menu, the
target address changes as follows.

0032 — 03C0 — 0700 — 08A0 — 0950— 0032 —
When the PLAY button is pressed while a target address is dis­played, continuous playback is performed after searching that
address.

• Each time the MODE button is pressed while the TEST-PLAY mode
target address is displayed, the digit which is changed by pressing
the FAST FORWARD/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 MODE 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 MODE button is set to -1h. (0 to F)

* When the FAST FORWARD/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 — 100 step — 1

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

address indication is restored. [ T R ] or [ 100 stp ]

• 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/REVERSE button is held down, jump

is repeated every approx. 100 ms.

• Whenever the DISP button is pressed in the continuous playback
mode, the indication changes as follows.

* Pre-mastered disc
Continuous playback [ S Q ]

(SUBQ address indication)
Continuous playback [ C E ]

(C1 error indication)
Continuous playback [ S Q ]

(SUBQ address indication)
* Recordabl disk

Continuous playback [ A P ]
(ADIP address indication)

Continuous playback [ C E ]
(C1 error indication)

Continuous playback [ A E ]
(ADIP error indication)

Continuous playback [ A P ]
(ADIP address indication)

|

|

|

|

|

– 13 –

MD-MT877/MD-MT877C

6. 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.

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

0032 — 03C0 — 0700 — 08A0 —0950 — 0032 —

When the PLAY button is pressed while a target address is dis­played, continuous playback is performed after searching that
address.

• Whenever the MODE button is pressed in the TEST-REC mode
target address is displayed, the digit which is changed by the FAST
FORWARD/REVERSE button changes as follows.

0032 — 0032 — 0032 — 0032 —

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

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

* When the FAST FORWARD/REVERSE button is held down, the

setting changes continuously, one cycle being 100 ms.

• When the VOLUME+/– button is pressed in the TEST-REC mode or
continuous record mode, the laser record power changes.
(Servo gain changes also according to record power.)

* After the laser record power is indicated for one second, the ad-

dress indication is restored. [ R P W _ ]

• : Address

• : Laser power cord

• Operation is disabled if the premastered disc or disc is in miserase­protected state.

7. 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

• 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 cancelled, and the power is turned off.

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

8. 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 DISP 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 : Adjustment servo retraction excessive retrial
16h : C. IN detection time-over
17h : A, B, E, F, and TCRSO offset measurement value out of

tolerable range
21h : Focus retraction completion allowable time-over
23h : Track search completion allowable time-over
32h : P-TOC read failure
42h : U-TOC read failure
44h : U-TOC write data write disabled/read check error
45h : U-TOC write test failure
52h : SD write data write disabled
72h : EEPROM data read check sum error
73h : Record head drive disabled (by EJECT lever)
91h : Ambient temperature is higher that the allowable temperature

Error messages

Can't READ

The details ' '

'f': Focus
'a': Servo adjustment
's': Track such
'r': TOC information reading
'u': UTOC information reading
'w': At the time of data writing
'p': Spindle start

Er-MD

The details ' '

'41': UTOC light test error
'80': EEPROM information reading error

– 14 –

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) Start the test mode. (Refer to page 12 "Entering the

TEST mode".)

(4) Version display (At the time of settlement of the test

mode by the button operation.)

[ V e r . ]

EEPROM version (c ~ z)
Microcomputer ROM

version
(5) The whole LCD lights.

(6) Test mode stop state.

[ T E S T ]

2. Temperature reference setting method

[1] Measurement, calculation and setting procedure

(1) Set the TEST mode.
(2) Start the EEPROM mode 'Temp' menu.

• Button operation in order of BASS, FAST REVERSE x

1 time, PLAY, PLAY in the test mode STOP state.

• 'TM$$%%' is displayed. ($$= Temperature code, %%
= Temperature reference)

(3) Once press FAST FORWARD, and determine the dis-

played microcomputer TEMP input AD value.

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

MD-MT877/MD-MT877C

(7) Press the "BASS" button, and press 1 time the "FAST

REVERSE" button.

[ E E P R O M ]

(8) Perform the operation to display "EEPROM SETTING

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

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

ture 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 .

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

ture corrected value from the temperature measure­ment value correction table.

(5) Determine the temperature reference, using the follow-

ing formula.

• Temperature reference = Microcomputer TEMP input

AD value + Temperature corrected value.

(6) 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

+ 8oC ~ +10oC - 05h + 9.1oC
+11oC ~ +13oC - 04h + 12.0oC
+14oC ~ +16oC - 03h + 14.9oC
+17oC ~ +19oC - 02h + 17.8oC
+20oC ~ +22oC - 01h + 20.7oC
+23oC ~ +25oC ± 00h + 23.6oC
+26oC ~ +28oC + 01h + 26.9oC
+29oC ~ +30oC + 02h + 29.4oC
+31oC ~ +33oC + 03h + 32.3oC

Temperature

correction

Center

temperature

[3] Temperature code identification
Check that the temperature code indicated after the servo
control corresponds to the temperature limits below

Ambient

temperature

- 9oC ~ +10oC 08h + 0.5oC

+ 3oC ~ +21oC 07h + 12.0oC
+15oC ~ +33oC 06h + 23.6oC
+26oC ~ +43oC 05h + 35.0oC

Temperature

correction

Center

temperature

– 15 –

MD-MT877/MD-MT877C

EEPROM DATA LIST (EEPROM version C)

Fucus setting

Item display

FG1 _ 44H
FG2 _ 70H
FF0 _ 10H
FF1 _ 70H
FF2 _ E8H
Ff0 _ 10H
Ff1 _ 48H
Ff2 _ EAH
FZH _ EDH
FLn _ 09H
FLp _ 06H
DJG _ 0F H
FSS _ 28H
FTS _ 18H
FSB _ 40H
FTB _ 38H
FGM _ 66H
TVG _ 84H
TO1 _ 50H
TO5 _ 58H
TOR _ 58H

Tracking setting

Item display

TG1 _ 14H
TG2 _ 2AH
TF0 _ 10H
TF1 _ 70H
TF2 _ E0H
Tf0 _ 10H
Tf1 _ 40H
Tf2 _ E4H
TFS _ 00H
TBo _ 20H
TBt _ 12H
TKo _ 20H
TKt _ 0DH
TDo _ 67H
TDt _ 34H
SCo _ 00H
SCt _ 3AH
SCm _ 48H
CLp _ 24H
CLr _ 30H
JPI _ 0EH
K10 _ 65H
THP _ 02H
THG _ 02H
TOP _ 00H
TOG _ F4H
T1P _ 20H

Set values

Set values

Spindle setting

Item display

SPG _ 30H
SPi _ 9AH
SPm _ 62H
SPo _ 4FH
PGM _ E0H
SP1 _ 10H
SP2 _ 60H
SP3 _ F2H
SP4 _ F2H
SP5 _ 10H
Sp2 _ 60H
Sp5 _ 10H
SD1 _ 7FH
SD2 _ 7FH
SPK _ EB H
MPG _ 28H
SPL _ 60H
SPW _ 0FH
SPB _ 66H
SRi _ C0H
SRm _ 9AH
SRo _ 7BH

Sled setting

Item display

SKS _ 7F H
SKL _ 7FH
SLC _ 24H
STL _ 07H
STM _ 42H
STE _ A6H
SDV _ 60H
SJP _ 03H
WTm_ 18H
SRV _ 54H
SLT _ 5CH
MVS _ 0AH
SLS _ 28H
SKE _ 0EH
SDE _ 1CH

Set values

Set values

– 16 –

MD-MT877/MD-MT877C

BASS setting

Item display

B1A _ 3FH
B1B _ 00H
B1C _ 00H
B2A _ 1FH
B2B _ 00H
B2C _ 00H
B3A _ E2H
B3B _ 00H
B3C _ 00H

ADJ.SET setting

Item display

COK _ 28H
FAT _ C0H
TAT _ 3EH
CAT _ 40H
FAB _ H

Digital EQ setting

Item display

HQ1 _ 90H
HQ2 _ 90H
HSG _ 11H
HSO _ FDH
LQ1 _ 90H
LQ2 _ 90H
LSG _ 11H
LSO _ 00H
GQ1 _ 98H
GQ2 _ 84H
GSG _ 11H
EQP _ 00H

Set values

Set values

Set values

Control setting

Item display

CT0 _ 02H
CT1 _ 01H
CT2 _ 30H
CT3 _ 20H
CT4 _ D0H
CT5 _ 4BH
CT6 _ 18H
RC0 _ C0H
RC1 _ FEH
SYC _ A6H
PWL _ 54H
DR1 _ 24H
DR2 _ 22H
IN1 _ 17H
IN2 _ 11H
INH _ 00H
DRH _ 64H
PLE _ A6H
RCE _ 94H
ELT _ A0H
X2T _ C0H
SDF _ 1F H
CHV _ 50H
DRS _ 5AH
DUP _ 00H
RFL _ D0H
CG1 _ 66H
FB0 _ FCH
RST _ 00H
R20 _ 80H
R21 _ 20H
R40 _ BFH
R41 _ 02H
FBL _ 16H
MC2 _ 00H
MC4 _ 00H
L2H _ 81H
L4H _ 80H
SPM _ 00H
MSL _ 80H
US0 _ 00H
US1 _ 00H
US2 _ 00H

Set values

– 17 –

MD-MT877/MD-MT877C

Do the following when replacing the mechanism, the pickup, the
EEPROM (IC402), the LSI(IC201) or the main PWB unit.

Enter the test mode, move the pickup to the most internal periphery and execute AUTO1.
(Use the disc of MMD-213A.)

A U T O 1

PLAY

A T 1

A D J . O K

PLAY

A T 2

A D J . O K

The indication of RAMDOM

The indication of "TEST"

AUTO2 It is made to carry it out

A D J . O K

A P # # # #

B Y E O K

(During the spare style automatic adjustment)

Normality completion

(During the adjustment that ATT is automatic)

Normality completion

Remote controller P-MODE button

(During the focus balance adjustment)

STOP is pushed

Move the pickup to the most internal periphery and press the BASS button
(Fast Forward Button)

PLAY

PLAY

STOP is pushed

(Adjustment completion)

(Continuance is regenerating)
It confirms that an address proceeds

Indication disappears
All the supply of the power supply is turned off

(In such cases as the battery)

If you replaced EEPROM, set the EEPROM valume to the final version.

Test Mode Start · Completion methool

• Starting method of the test mode
When the unit is in the stand-by state (with no display), the test mode is started by performing
the following operation using the remote control.
Press the [PLAY] button while pressing the [PLAY-MODE] button, and release the [PLAY-MODE] button
while keeping the [PLAY] button pressed, and press the [VOLUME–] button.

Indication after the start :

T E S T

Volume+

Volume -

All the lighting

• How to cancel the test mode

T E S T

STOP

: LCD all the lighting two seconds

: To the test mode stop ([Test mode menu])

Performance mode =Normal
Playback volume =28
LINE REC volume =30
Microphone REC volume =20
Resume setting =Cancellation

: Version indication 2 seconds

EEPROM version

Destination

Program version

: Test mode stop

B Y E
B Y E O K

POWER OFF

: [OK] or [NG]
Check the microcomputer RAM and EEPROM with
the contents of the preliminary adjustment.

Pickup position initialisation
EEPROM contents renewal

– 18 –

Change of Tset Mode Menus

BASS

T E S T

SKIP UP

Slide external

periphery move

SKIP DOWN

Slide internal

periphery move

SKIP DOWN

A U T O 1

SKIP UP SKIP DOWN

A U T O 2

SKIP UP SKIP DOWN

T P L A Y

SKIP UP SKIP DOWN

T R E C

SKIP UP SKIP DOWN

M A N U 1

SKIP UP SKIP DOWN

M A N U 2

SKIP UP SKIP DOWN

R S L T 1

SKIP UP SKIP DOWN

R S L T 2

SKIP UP SKIP DOWN

D i n M o n

SKIP UP SKIP DOWN

E D A T A

SKIP UP SKIP DOWN

N O R M A L

SKIP UP SKIP DOWN

E E P R O M

SKIP UP

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [VOLUME+] button is pressed in the "TEST MODE STOP" state, the program version
is displayed for 2 seconds
* When the [VOLUME–] button is pressed in the "TEST MODE STOP" state, all the displays
appear for 2 seconds.

: Test mode stop

: Pre-automatic adjustment menu

: ATT auto adjustment menu

: Continuous playback menu

: Continuous record menu

: Pre-manual adjustment menu

: ATT manual adjustment menu

: Pre-adjustment value check menu

: ATT adjustment value check menu

: Digital input signal monitor menu

: Error history display menu

: Test mode normal play menu

: EEPROM setting menu

MD-MT877/MD-MT877C

Servo 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.
* Move the pickup lens manually to the innermost periphery before performing the servo
preliminary auto adjustment. (Refer to "Change of test mode menus" for the operation method.)
* " " is the internal processing number, the meanings of the numbers are as follows.

0 0 : Initial setting
0 2 : ABEF input offset measurement
0 4 : AB input (ABMAXO) level setting
0 5 : Focus ATT tentative setting
0 6 : Pit section EF input level setting
0 7 : COUT level setting for pit section adjustment
0 8 : Sled external periphery move
0 9 : Groove section EF input level setting
1 0 : COUT level setting for groove section adjustment
1 1 : TCRS input level setting
1 2 : Tracking ATT initial setting
1 3 : AB input (LPFABO) level setting
1 4 : Focus ATT initial setting

1 6 : TCRS input offset measurement
* It is necessary for each test mode where servo operation is made to complete the preliminary
adjustment. (Otherwise, "ErADJ." appears.)
* The preliminary adjustment complete state is stored on the EEPROM (protected field).

: Preautomatic adjustment menu
Adjustment error

: During preautomatic adjustment

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

: During ATT automatic adjustment

– 19 –

MD-MT877/MD-MT877C

Servo 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

PLAY

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

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* Move the pickup lens manually to the innermost periphery before performing the servo
ATT auto adjustment. (Refer to "Change of test mode menus" for the operation method.)
* " " represent the adjustment number as follows.

0 0 : Initial setting
0 3 : Pit section tracking ATT setting
0 4 : Pit section focus ATT setting
0 6 : Sled 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 error (adjustment value output)

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

Continuous Playback

• Continuous playback from current pickup position

T P L A Y

PLAY

AUTO1 Practice finish?

YES

AUTO2 Practice finish?

NO

E r A D J

NO

AUTO2 Practice

: Continuous playback menu

YES

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

• Continuous playback from any address

T P L A Y

DISP

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 [DISP] button is pressed.
0 0 3 2

H

(initial value) 0 3 C 0

DISP

A d 0 0 3 2

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

MODE

A d 0 0 5 0

* 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
* If the [P-MODE] button is pressed in the continuous playback state, the mode is changed to the B-ATT setting
state of the ATT manual adjustment.

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

P-MODE

H B
L B

YES

No error?

NO

A D J. N G

: Continuous playback menu

: Start address setting

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

# # # # : Address

H

A d 0 3 C 0

DISP

0 9 5 0

A d 0 7 0 0

H

A d 0 9 5 0

A d 0 0 5 0

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

# # # # : Address

: High-reflection pit section B-ATT (focus) setting
: Low-reflection groove section B-ATT (focus) setting

: ATT setting

MODE

A d 0 0 5 0

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

0 7 0 0

H

DISP

MODE

# # # # : Address

DISP

A d 0 8 A 0

0 8 A 0

H

– 20 –

* In the continuous playback state the number of jump lines changes as follows shown
the [BASS] button is pressed.

1 (initial value) 10

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).

• Focus balance Adjustment mode

T-PLAY Each indication

PLAY

b # # #

DISP

BASS

1 0 T R

: Continuous playback menu

: Focus balance Adjustment mode

Others indication

* The focus balance adjustment mode is available only for low reflection discs.
* The RANDOM marker lights up in the focus balance adjustment mode.
* The focus balance ( ) can be changed by the VOL UP/DOWN button operation.
* If the PLAY button is pressed in the focus balance adjustment mode, the unit returns to the
continuous playback mode.

BASS

1 0 0 s t p

BASS

: Focus balance

# # # : Jitter error

100step

Continuous Record

Enter the EEPROM setting mode, and press the FAST FORWARD button.
Change the MSL setting value from 00 to 08 by using CTRL_ (control setting menu).
(If the MSL remains in 00, no signal is recorded.)

• Continuous record from the current pickup position

T R E C

PLAY

AUTO1 Practice finish?

YES

AUTO2 Practice finish?

NO

E r A D J

NO

AUTO2 Practice

: Continuous record menu

MD-MT877/MD-MT877C

YES

A P # # # #

• Continuous record playback from any address

T R E C

DISP

A d 0 0 3 2

PLAY

A P # # # #

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

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

A d 0 0 5 0

* 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 record state and start address set state the record laser power changes in the
range of "0h to Fh" when the [VOLUME +/–] button is pressed. (Initial value 0DH)

DISP

MODE

YES

No error?

NO

A D J. N G

: Continuous record menu

: Start address setting

: Continuous record

A d 0 3 C 0

0 9 5 0 H

A d 0 9 5 0

A d 0 0 5 0

: Continuous record

# # # #: Address

DISP DISP

A d 0 7 0 0

DISP

MODE

A d 0 0 5 0

MODE

# # # #: Address

A d 0 8 A 0

– 21 –

MD-MT877/MD-MT877C

Servo Pre-Manual Adjustment

M A N U 1

PLAY

T M P $ $

SKIP UP SKIP DOWN

A h

SKIP UP SKIP DOWN

B h

SKIP UP SKIP DOWN

E h

SKIP UP SKIP DOWN

F h

SKIP UP SKIP DOWN

L O N P

SKIP UP SKIP DOWN

A B

SKIP UP SKIP DOWN

S a

SKIP UP SKIP DOWN

S b

SKIP UP SKIP DOWN

e f

SKIP UP SKIP DOWN

P C H

SKIP UP SKIP DOWN

e f

SKIP UP SKIP DOWN

G C H

SKIP UP SKIP DOWN

T C

SKIP UP SKIP DOWN

S E

SKIP UP SKIP DOWN

S F

SKIP UP SKIP DOWN

a b

SKIP UP SKIP DOWN

S A

SKIP UP SKIP DOWN

S B

SKIP UP SKIP DOWN

T H

* When the [STOP] button is pressed in specific condition, the "TEST MODE STOP" state is set.
* If the [BASS] button is pressed in the laser ON state (with no disc or the lid open), laser power
changes as follows.

Play back Record power Maximum power

1 (initial value) 10 384

L O N P

* In the specific setting display state the setting change digit changes when the [P-MODE]
button is pressed.

• In the case of the setup value two digits.
1st digit (initial value) 2nd digit

• In the case of the setup value three digits.
1st digit (initial value) 2nd digit 3nd digit

* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/–]
button is pressed.
* If the [DISP] button is pressed, the display changes as follows.

BASS

P-MODE

P-MODE

: Pre-Manual Adjustment menu

: Temperature code indication

$ $ : Temperature code

: A signal offset (AINO) measurement

: B signal offset (BINO) measurement

: E signal offset (EINO) measurement

: F signal offset (FINO) measurement

: Laser ON (play power)

: AB signal level measurement (ABMAXO)

: A-ATT (focus) tentative setting

: B-ATT (focus) tentative setting

: Pit section EF signal level measurement (LPFEFO)

: Pit section adjustment COUT level setting

: Groove section EF signal level measurement (LPFEFO)

: Groove section adjustment COUT level setting

: TCRS signal level measurement (TCRSMIO)

: E-ATT (tracking) initial setting

: F-ATT (tracking) initial setting

: AB input level measurement (LPFABO)

: A-ATT (focus) initial setting

: B-ATT (focus) initial setting

: TCRS signal offset (TCRSO) measurement

L O N R

P-MODE

: Measurement value

: Measurement value

: Measurement value

: Measurement value

: Measurement value

: ATT setting

: ATT setting

: Measurement value

: COUT level setting

: Measurement value

: COUT level setting

: Measurement value

: ATT setting

: ATT setting

: Measurement value

: ATT setting

: ATT setting

: Measurement value

BASS

L O N M

BASS

P-MODE

P-MODE

– 22 –

• ABMAXO measurement value

S a
S b

DISP DISP

A B

• LPFABO measurement value

S A
S B

DISP DISP

a b

• LPFEFO measurement value

P C H

G C H

DISP DISP

e f

• LPFEINO/EFMIO measurement value

S E

DISP

e i

DISP

DISP

E F

• LPFFINO/EFMIO measurement value

S F

DISP

f i

DISP

DISP

E F

: A-ATT (focus) tentative setting
: B-ATT (focus) tentative setting

: ABMAXO measurement value indication
"1" Mark lighting

: A-ATT (focus) tentative setting
: B-ATT (focus) tentative setting

: LPFABO measurement value indication
"1" Mark lighting

: Pit section adjustment COUT level setting
: Group section adjustment COUT level setting

: LPFEFO measurement value indication
"1" Mark lighting

: E-ATT (tracking) initial setting

: LPFEINO measurement value indication
"1" Mark lighting

: EFMIO measurement value indication
"REPEAT", "1" Mark lighting

: F-ATT (tracking) initial setting

: LPFFINO measurement value indication
"1" Mark lighting

: EFMIO measurement value indication
"REPEAT", "1" Mark lighting

MD-MT877/MD-MT877C

Servo ATT Manual Adjustment

M A N U 2

PLAY

T M P $ $

SKIP UP SKIP DOWN

L O N P

SKIP UP SKIP DOWN

P E

SKIP UP SKIP DOWN

P F

SKIP UP SKIP DOWN

H A
L a

SKIP UP SKIP DOWN

H B
L b

SKIP UP SKIP DOWN

G C

SKIP UP SKIP DOWN

G E

SKIP UP SKIP DOWN

G F

SKIP UP SKIP DOWN

L A

SKIP UP SKIP DOWN

L B

* When the [STOP] button is pressed in specific condition, the "TEST MODE STOP" state is set.
* If the [PLAY] button is pressed in the B-ATT setting state, the mode is changed to the continuous
playback mode.
And if the [P-MODE] button is pressed in the continuous playback state, the mode is changed to
the B-ATT setting state of the ATT manual adjustment.

: ATT manual adjustment menu

: Temperature code indication

$ $ : Temperature code

: Laser ON (play power)

: Pit section E-ATT (tracking) setting

: Pit section F-ATT (tracking) setting

: High reflection A-ATT (focus) setting
: Low reflection A-ATT (focus) setting

: High reflection B-ATT (focus) setting
: Low reflection B-ATT (focus) setting

: TCRS ATT setting

:Groove section E-ATT (tracking) setting

:Groove section F-ATT (tracking) setting

: Low reflection A-ATT (focus) setting

: Low reflection B-ATT (focus) setting

: ATT setting

: ATT setting

: ATT setting

: ATT setting

: ATT setting

: ATT setting

: ATT setting

: ATT setting

: ATT setting

– 23 –

MD-MT877/MD-MT877C

gj

H B
L b
L B

PLAY P-MODE

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

* If the [BASS] button is pressed in the laser ON state (with no disc or the lid open), laser power
changes as follows.

Playback power Record power Maximum power

BASS

L O N P

* In the specific setting display state the setting change digit changes when the [P-MODE]
button is pressed.

* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/-]
button is pressed.
* If the [DISP] button is pressed, the display changes as follows.

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

P-MODE

• LPFABO measurement value

H A
H B
L a
L b
L A
L B

DISP DISP

a b

• TCRSMIO measurement value

G C

DISP DISP

T C

• LPFEINO/EFMIO measurement value

P E
G E

DISP

e i

DISP

DISP

E F

• LPFFINO/EFMIO measurement value

P F
G F

DISP

f i

DISP

DISP

E F

: High-reflection pit section B-ATT (focus) setting
: Low-reflection pit section B-ATT (focus) setting
: Low-reflection groove section B-ATT (focus) setting

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

L O N R

: ATT setting

BASS

L O N M

BASS

P-MODE

MODE

: High-reflection pit section A-ATT (focus) setting
: High-reflection pit section B-ATT (focus) setting
: Low-reflection pit section A-ATT (focus) setting
: Low-reflection pit section B-ATT (focus) setting
: Low-reflection groove section A-ATT (focus) setting
: Low-reflection groove section B-ATT (focus) setting

: LPFABO measurement value indication
"1" Mark lighting

: TCRS ATT setting

: TCRSMIO measurement value indication
"1" Mark lighting

: Pit section E-ATT (tracking) setting
: Groove section E-ATT (tracking) setting

: LPFEINO measurement value indication
"1" Mark lighting

: EFMIO measurement value indication
"REPEAT", "1" Mark lighting

: Pit section F-ATT (tracking) setting
: Groove section F-ATT (tracking) setting

: LPFFINO measurement value indication
"1" Mark lighting

: EFMIO measurement value indication
"REPEAT", "1" Mark lighting

– 24 –

Servo Pre-adjustment Value Check

MD-MT877/MD-MT877C

R S L T 1

PLAY

A H

SKIP UP SKIP DOWN

B H

SKIP UP SKIP DOWN

E H

SKIP UP SKIP DOWN

F H

SKIP UP SKIP DOWN

T H

SKIP UP SKIP DOWN

e f

SKIP UP SKIP DOWN

T C

SKIP UP SKIP DOWN

a b

SKIP UP SKIP DOWN

P C H

SKIP UP SKIP DOWN

G C H

SKIP UP SKIP DOWN

S A

SKIP UP SKIP DOWN

S B

SKIP UP SKIP DOWN

S E

SKIP UP SKIP DOWN

S F

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* In the specific setting display state the setting change digit changes when the [P-MODE]
button is pressed.

• In the case of the setup value two digits.
1st digit (initial value) 2nd digit

• In the case of the setup value three digits.
1st digit (initial value) 2nd digit 3nd digit

* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/–]
button is pressed.

: Pre-adjustment Value Check menu

: A signal offset measurement value (setting)

: B signal offset measurement value (setting)

: E signal offset measurement value (setting)

: F signal offset measurement value (setting)

: TCRS signal offset measurement value

: EF signal measurement value

: TCRS signal measurement value

: AB signal input measurement value

: Pit section adjustment COUT level setting

: Groove section adjustment COUT level setting

: A-ATT (focus) initial setting

: B-ATT (focus) initial setting

: E-ATT (tracking) initial setting

: F-ATT (tracking) initial setting

P-MODE

P-MODE

P-MODE

P-MODE

P-MODE

– 25 –

MD-MT877/MD-MT877C

Error History Display

• Error history clear

E D A T A

DISP

C L E A R

• Error history indication

E D A T A

PLAY

E 0 $ $

SKIP UP SKIP DOWN

E 1 $ $

SKIP UP SKIP DOWN

E 2 $ $

SKIP UP SKIP DOWN

E 3 $ $

SKIP UP SKIP DOWN

E 4 $ $

SKIP UP SKIP DOWN

E 5 $ $

SKIP UP SKIP DOWN

E 6 $ $

SKIP UP SKIP DOWN

E 7 $ $

SKIP UP SKIP DOWN

E 8 $ $

SKIP UP SKIP DOWN

E 9 $ $

SKIP UP SKIP DOWN

R C

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

After one second

: Error history indication menu

: Error history clear

: Error history indication menu

: Error history 0 indication

$ $ : Error code

: Error history 1 indication

$ $ : Error code

: Error history 2 indication

$ $ : Error code

: Error history 3 indication

$ $ : Error code

: Error history 4 indication

$ $ : Error code

: Error history 5 indication

$ $ : Error code

: Error history 6 indication

$ $ : Error code

: Error history 7 indication

$ $ : Error code

: Error history 8 indication

$ $ : Error code

: Error history 9 indication

$ $ : Error code

: Total recording time

ATT Setting Check

R S L T 2

PLAY

P E

SKIP UP SKIP DOWN

P F

SKIP UP SKIP DOWN

G E

SKIP UP SKIP DOWN

G F

SKIP UP SKIP DOWN

H A

SKIP UP SKIP DOWN

H B

SKIP UP SKIP DOWN

L A

SKIP UP SKIP DOWN

L B

SKIP UP SKIP DOWN

G C

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* In the specific setting display state the setting change digit changes when the [P-MODE]
button is pressed.

• In the case of the setup value three digits.
1st digit (initial value) 2nd digit 3nd digit

: ATT Setting Check menu

: Pit section E-ATT (tracking) setting

: Pit section F-ATT (tracking) setting

: Groove section E-ATT (tracking) setting

: Groove section F-ATT (tracking) setting

: High-reflection A-ATT (focus) setting

: High-reflection B-ATT (focus) setting

: Low-reflection A-ATT (focus) setting

: Low-reflection B-ATT (focus) setting

: TCRS-ATT setting

P-MODE

P-MODE

* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/–]
button is pressed.

– 26 –

Test Mode Normal Playback

MD-MT877/MD-MT877C

N O R M A L

PLAY

@@@@@@

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

: Test mode normal playback menu

: Normal playback mode

@@@@@@: Mode and address indication

EEPROM Setting

• Menu transition

E E P R O M

PLAY

T e m p

SKIP UP SKIP DOWN

SKIP DOWN

F o c u s

SKIP UP SKIP DOWN

T r a c k

SKIP UP SKIP DOWN

S p i n

SKIP UP SKIP DOWN

S l e d

SKIP UP SKIP DOWN

B a s s

SKIP UP SKIP DOWN

A D J S E T

SKIP UP SKIP DOWN

D E Q S E T

SKIP UP SKIP DOWN

C T R L

SKIP UP SKIP DOWN

SKIP UP

L S I I F

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

• TEMP Setting

T e m p

PLAY

T M $ $

SKIP UP SKIP DOWN

T P i n

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [DISP] button operation is performed in the specific state, the menu changes to
"TEMP SETTING menu".
* When the [P-MODE] button is pressed in each state, the set digit is changed.

1st digit (initial value) 2nd digit

* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/–]
button is pressed.

• Setup except for TEMP

Each setup menu

PLAY

P-MODE

P-MODE

Setup item

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [DISP] 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 [P-MODE]
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 [VOLUME +/–]
button is pressed.

P-MODE

P-MODE

: EEPROM setting menu

: TEMP setting menu

: Focus setting menu

: Tracking setting menu

: Spin setting menu

: Sled setting menu

: BASS setting menu

: Adjustment setting menu

: Digital EQ setting menu

: Control setting menu

: LSI setting TEST mode menu

: Temp setting menu

: TEMP standard value setup

: TEMP A/D input value indication

: Each setup menu except for TEMP

: Each setup item except for TEMP

: Setup value

$ $ : Temperature code

: Setup value

– 27 –

MD-MT877/MD-MT877C

NOTES ON SCHEMA TIC 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 pico-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

• 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.

TYPES OF TRANSISTOR AND DIODE

TOP VIEW

B

(G)

(3)

E

TOP

VIEW

(S)

1

2SA17457
2SA1832 GR
2SC4738 GR
2SD1979 S
DTC144 EE
RN1104
RN1444 A

C

(D)

(2)

3

FDN339 N

F10J2E

REF. NO

SW401 EJECT OFF—ON
SW901 DISC PROTECT OFF—ON
SWA01 RECORD OFF—ON
SWA02 PLAY OFF—ON
SWA03 BASS OFF—ON
SWA04 EDIT OFF—ON
SWA05 DISPLAY OFF—ON
SWA06 VOLUME – OFF—ON
SWA07 VOLUME + OFF—ON
SWA08 STOP OFF—ON
SWA09 MODE OFF—ON
SWA10 FAST REVERSE OFF—ON
SWA11 FAST FORWARD OFF—ON
SWA12 ENTER OFF—ON
SWA13 OPEN/CLOSE OFF—ON

DESCRIPTION

POSITION

TOP VIEW

1
2
3

6
5

4

RN4904
RN4911

2

1

TOP VIEW

HRB0103B
1SS372

1

2

3

FDG312 P

TOP VIEW

1SS361

TOP VIEW

SBE803

TOP VIEW

6
5
4

1
2
3

4

8
7

6

1
2
3

6
5
4

5

HN1C01 FU

FTD2017

– 28 –

MD-MT877/MD-MT877C

IC651

MOTOR

DRIVE

LB1938T

VCC

VEE

IC841

XC6372C281PR

2.8V UP CONVERTER

M903

LIFT MOTOR

IC842

62GR2522

2.5V REGULATOR

IC822 IR3M14N

DC/DC

CONVERTER

IC821 CPH3413

N-CH MOS FET

IC501

AD/DA

CONVERTER

AK4551VT

M902

SLED

MOTOR

IC101

RF SIGNAL

PROCESSOR

IR3R58M

2.3V REGULATOR

IC771 62GR2322

IC401

SYSTEM

MICROCOMPUTER

IX0419AW

RIPPLE

FILTER

OPIC

LASER

PICK

HEAD

M901

SPINDLE

MOTOR

IC201

ENDEC/SERVO/ATRAC

LR378161

+2.7V

+2.5V

T F

+2.5V

+2.7V

+2.7V

AVCC

+2.5V

+2.7V

J703

EARPHONES

TERMINAL

J703

REMOTE CONTROL

TERMINAL

+2.35V

SWA01-13

IC703

AUDIO AMP.

IR3R59N

IC701

AUDIO AMP.

IR3R54N

IC601

MOTOR DRIVE

BD6640KV

VM

IC402

EEPROM

58X2404T

VS

IC202

IX2824AF

16M BIT D-RAM

OPTICAL

J701

OPTICAL IN

J701

LINE IN

J702

MIC IN

(READY FOR

PLUG/IN POWER)

7,10,12

55,60

39,41,43

27,31,

40,45

29,40

37

26-30,

32-37,

39-46

2-5,7-11

14-23

6,7

66

74

9

2

3

15

4

20

17

6,19

12

10

6

24 L-CH

22 R-CH

17

Q721

1-2

1-3,17,27,52,64

1-3

2,5,6,7

96-99

40,47,

48,81,

91,92

31-33

49,72

2,5

17-22,

24,25

57,58

5

2

8

3

1,12

+2.7V

82-84,86,

89-100

4,7

5,6

SW401

EJECT

SW901

DISC

PROTECT

68

12,53,54,62

73

8

PLAYBACK SIGNAL

RECORD SIGNAL

+B

M

M

M

+2.7V

1-11,36,38,

73,74,93

R-CH

L-CH

2

R-CH

3

L-CH

VCC

L-CH

5

8

R-CH

HEAD DRIVE

IC351 74ACT02FT

IC354 CPH5608

IC353 FTD2005

VCC

F841

0.4A,DC 60V

2

2

2

1

IC431

RESET

S-80820LNP

1

59

-2.7V

IC404

GATE IC

N7SZ86P5

2

76

2,3

50

4

KEY UNIT

2

3

16

21

L-CH

4

3

R-CH

BATTERY

TERMINAL

EXTENSION

TERMINAL

9,16

L-CH

R-CH

IC271 FT75S54FU

OP AMP.

IC251 S-80808LNP

RESET

IC801 S-80814ALNP

RESET

Q251-Q254,Q261

Q801,Q802,Q821

2.5V REGULATOR

IC200 62GR2522

2

5

5

+2.3V

14,51,62

+1.5V

IC852 IR3M14N

DC/DC

CONVERTER

IC851 CPH3413

N-CH MOS FET

VCC

VEE

VCC

1-2V

IC873

62GR4522

4.5V REGULATOR

5,6

(+1.5V)

(-1.5V)

IC871

TC7S86FU

EXCLUSIVE

OR GATE

1

1

Figure 29 BLOCK DIAGRAM

– 29 –

MD-MT877/MD-MT877C

0

0

4

0

MAIN PWB-A

A

B

C

TP102

TP101

1 2 3 4 5 6 7 8 9

CN101

1

LDON

LDVAR

D

IC351

74ACT02FT

HEAD DRIVER

5

4 3

S

G2

G1
D1

D2

2 1

E

IC354

R361

15

IC354

CPH5608

0.039

HEAD DRIVER

F

TP661

11 10

CN601

11

G

HEAD

HEAD

COM

M

M901
SPINDLE
MOTOR

MECHANISM FLEXIBLE

PLAYBACK SIGNAL
RECORD SIGNAL

L103

TP107

TP111

TP110

TP108

TP103

TP106

TP105

TP109

TP113

TP114

10 11 12 13 14 15 16 17 18 19

A

B

RF4

RF2

DGND

DGND

VCC

VCC

COM

MP/R

AGND

CVCC

OPIC

OPTICAL PICKUP

TP352

IC351

8

GND

9

10
11

12

C357

13

0.1

VCC

14

C354 0.1

C353

10/6.3

D351

SBE803

4

3

C351

N.C.

2

47P

1 5

(CH)

C361

TP658

TP657

TP660

TP659

987654321

W
U

V

TP656

TP655

TP654

–
+

TP653

TP652

M

IC353

FTD2005

HEAD DRIVER

TP651

1

M902

SLED

MOTOR

U
W
V

M

M903
LIFT
MOTOR

R111

C114

12K

5P(CH)

CK111
CK112
CK113
CK114

C102 1

C103

1

TP144

TP144

R131

R132
1M

150K

R133

R134
1M

150K

RF SIGNAL PROCESSOR

T–
T+
F+
F–

TP121

TP120

TP116

TP117

TP118

TP115

TP119

TP122

20 21 22

22

F

E

T–

F–

F+

T+

RF1

RF3

R920
100K

7

0V

3

2

6

4.22V

Q901

5

1

RN1104

4

0V

3
2
1

R351

3.9

TP351

7

5

8

6

S2

D2

G2

S1S2G1

D1

S1

4 3 2 1

IC353

C602

1

C601

1

C603

1

C604

1

IC601

BD6640KV

MOTOR DRIVE

C111

1

C107

0.1

C106

C112

1234
RF1

1

RF2

2

RF3

3

RF4

4

REFI

5
6

AOUT

7

ASW

8

AIN

9

BIN

10

BSW

11

12

BOUT

1

0.1

48 47 46 45 44 43 42

1+2

PIN

3+4

NIN

PITG

R

and
SW

DIFF

REFO

BIAS

IC101

EIN

FIN

FOUT

EOUT

ESW

FSW

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

56K

56K

R137

R135

TP130

R136
390K

R138
390K

IC101 IR3R58M

R161

C165

1.2K

0.033

15

2

TP105A

C172

33/6.3

+B

C901

1

C912

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

0.1

49
50

C911

C2M

51

0.1

EXTCLK

52

N.C.

53

L602

H2PG2

54

22µH

H2ROUT

55

H2VM

56

H2FOUT

57

H2PG

58

L603

4.7µH

L604
22µH

L601

22µH

X176K

FODRF

H1PG1

59

H1ROUT

60

H1VM

61
62
63

IN1R

64

FODRR

C109

1

C110

0.22

C108

1

R112

220K

EFMO

41 40 39 38 37

EFMAGC

2-1

DCNF

GND1

MOTOR DRIVE

VG

IN2F

TRDRF

BIAS

BOUT

EOUT

TP131

TP132

LB1938T

VCC2

VCC1

SLVM1

49
50
51

62
63
64

IN2R

STALL

STHB

5

4 3 2 1

DCNT1

TRDRR

VCC1

VCC2

OPICPW

MODE

TCGO

AOUT

TP133

R140
390K

L171
10µH

C171
33/6.3

+B

5

N.C.
O2

6

O1

7

G

VCC

8

IC651

SLPG1

SLUOUT

C2P
C1M
C1P

IC601

H1FOUT
H1PG
IN1F

SPVM1

SPUOUT

7

8

6

BPF

TCGI

G
I2
I1

SLVOUT

SPPG1

9

ADIP

GND2

WBO

SW

RFADD

TP487A

D651
F10J2E

4
3
2
1

SLVM2

32

S2
S1

31

SGND

30

19
18
17

N.C.

10

ADAGI

AGC

ADIPO

R139
39K

C133

0.22

SLPG2

SLWOUT

SPVIN
SPUIN

PWIN1

SPVM2

SPVOUT

11

DTEMP

TP487

N.C.

12

C131

0.1

36
35
34

ADAGC

33

ADIPNF

N.C.

32
31
30
29

N.C.

28
27

DISC

26

SGAIN

25

TEMP

N.C.

SLCOM

BEMFW

ASGND

SPCOM

SPWIN

SPWOUT

SPPG2

14

13

C113
1

LDVAR

OPICGA

N.C.

BEMFV

BRK–
BRK+

CSL2
CSL1

CST
RIB

PWVM

15

C608

+B+B

CK102

+B

LDON

C652

N.C.

BEMFU

FG

PWOUT

16

L608

10µH

1

+B

C132

0.22

0.1

32

S3

31
30
29
28
27
26

C910 0.047

25

C909 0.047

24

C908 0.33

23
22
21

C907 0.0022

20

C906 0.0022

19

C905 0.0022

18

PWPG

17

TP100

R102

22K

R101

22K

+B

+B

SPDRF

R906
270K

SPDRR

14

R103

R909

10K

CK108

22K

R905
100K

R903
470

R904
10K

R104

TP139

22K

CK203

CK202

CK201

11

10

4
3

TP211

XRT

C204

0.47

+2.5V

C124
330P

330P

C123

220P

C122

C121
220P

EFMO

LDCNT1
LDCNT2

SPIN

C902

0.01

SLCNT3
SLCNT2
SLCNT1

13

R907
180K

R908
100K

2

3

1

TP901

SW901
DISC PROTECT

FOK
SENSE
CIN

DINT

R204

SYD0
SYD1
SYD2
SYD3
SYD4
SYD5
SYD6
SYD7
SYWR
SYRD
SYRS

TP201A

R403

TP202

R207

680

1

L204

TP208

TP209

76

TP210

77
78
79

OPTCNT

80

DAPON

81

ADPON

CK204

82

FOK

CK205

83

SENSE

CK206

84

COUT

85

MCCK

C203

86

DINTX

0.1

87

VDD2

88

DGND

1K

89

RSTX

90

SYSD0

91

SYSD1

92

SYSD2

93

SYSD3

94

SYSD4

95

SYSD5

96

SYSD6

97

SYSD7

98
99
100

9

TP201

HDON

FP31

FP32

+B

R404

100K

DISCPR

1K

TP610

C605

C600

0.1

22/6.3

TP204

R222

1M

C211 5P(CH)

C212

8P(CH)

CK207

DIN

X1O

BCLK

LRCK

DFCK

DOUT

DGND

PLLBVC

ADDATA

73

DADATA

74

FEMON

75

TOTMON

76

TEMON

77

HDON

78

IC201

LR378161

ENDEC/SERVO

/ATRAC

EFMMON

1

AVCC

2

SYWRX

98

SYRDX

99
100

SYRS

VREF

AVCC2

EFMI

BIN

EIN

AIN

AGND

TCG

WBI

7

5

9

8

4321

6

0.1

C209

C207

0.1

+B

OPICGA
BEEP
SGAIN

DISC

TP415

AUSCLK
AUDATA
CHGCNT

DSPDAT
DSPSTB
DSPSCK
PBMUTE

TP412

CIN
SPIN
DINT

DISCPR

C130

0.1

LDVAR

TEMP

RKEY

HKEY2

HKEY1

STDCK

22K

R424

R425

+B

XL201

33.8688MHz

LDCNT1

LDCNT2

CK225

54 53 52 51555657585960616263646566676869707172737475

X1I

VXI

VPO

VDD1

EMPH

DGND

ACRCER

48

PLCK

49

EFMO

50

X700KO

51
52

TCRS

VDD1

DGND

FIN

X176KO

TEST2

VBAT

TP206

TP207

0.1

R206

C205

100K

R205
27K

FODRF

X176KO

RFPCNT

25

26
27

RACLK

28

RADAT

29

CHGCNT

30

DSPDAT

31

DSPSTB

32

DSPSCK

33

PBOPON

34

P11

35

N.C.

CIN

36

SPIN

37

DINT

38

DISCPR

39

ARQD

40

P17

41

N.C.

AVSS

42

LDVAR

43
44

N.C.

RKCNG

45

TEMP

46

HKEY2

47

HKEY1

48
49
50

Vref

54535251 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75

22K

22K

PLVBAT

PLVDCI

R423

50
49

TEST0

TEST1

DILOCK

48

LDCNT2

LDCNT1

LEDON1

47

RAA11

46

RAD0

45

RAD1

44

RAWEX

43

RARASX

42

RAA9

41

RAD3

40

RAD2

39

RACASX

38

DGND

37

RAOEX

36

RAA8

35

RAA7

34

RAA6

SLDRR

23

33

RAA5

SPDRF

24

32

RAA4

25

SPDRR

31

VDD2

26

RAA3

30

RAA10

27

RAA2

29

RAA0

28

RAA1

27
26

SLDRF

TRDRR

TRDRF

FODRF

FODRR

2223 24 25212019181716151413121110

+1.5V

SPDRF

SPDRR

C100

10/6.3

TRDRR

TRDRF

FODRR

R422
100K

TP417

TP416

INPGCK

MCPGIN

INPGIN

VSS

JPNP

INPGI

TEST1

TEST0

MCPGI

INPGCK

OPICGA

RCPCNT

RFPCNT

23

BUZOUT

24

SGAIN

25

DISCP

26

MCMON

27

IC401

IX0419AW

SYSTEM

MICROCOMPUTER

RKEY

49

STDCK

50

PLVDCI

51

PLVBAT

52

OSC1

VCC

uSTBY

_DCIN

MD1

MD0

AVCC

_RESET

N.C.

TP400

R406

22K

SW401

FP59

EJECT

XL401

3.68MHz

TP406

_DCIN

D431

1SS361

R431

C431

330K

0.47

TP212

EFMO

TP205

12

C201

10/6.3

L100
10µH

C151

0.01

R151
100K

SYD7

SYD4

SYD3

SYD6

SYD5

RCAULT

7

13 12 11 101415161718192021222324

9

8

VCC

SYD7

SYD6

SYD5

SYD4

RCLAT

SYRS

1

SYRD

2

EEPK

98

EPRT

99
100

PCNT1

74

FOK

75

DCEXT
RMDAT

76

PCLDI

77

SCK0

78

FWE

VSS

EXTAL

MD2

EJSW

XTAL

R407

FP67

100K

FP66

SLCNT3

R408
100K

AURESET

IC431

S-80820LNP

RESET

VSS

OUT
VDD

CK224
TP203
CK222

1
2

Q103

FDG312 P

SYD2

SYD1

SYD0

5

4 3 2 1

6

SYD3

SYD2

SYD1

LEDCNT2

LEDCNT3

LEDCNT1

SLCNT3

SLCNT1

SLCNT2

10K

R405

SLCNT1

RPLAY

SLCNT2

4321

N.C.

SYWR

SYD0

CKSTP

EMPH0
PCNT2

PCNT3

BATON
DCNT1

RPLAY

SENSE

R462

22K

6
5
43

SYWR

EEPD
EPCS

XRST

_PLAY

DCON

PBLAT

LDON

STOP

ELON

SENSE

TP200

SYRS

SYRD

REC

FOK

DCEXT

1
2
3
4
5
6

7
8
9
10
11

12
C202
47/6.3

VCCDRAM

L202
10µH

+2.7V

R411
100K

TP409

TP408

R414

1K

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

N.C.

77
76

TP402

R402

100K

D432

1SS372

LDON

R461 100K

R463 100K

VCC
I/O1
I/O2
WE
RAS
N.C.

A10
A0
A1
A2
A3
VCC

IC202

IX2824A

16MBIT

D-RAM

VCC2R5V

58X2
EEPR

TP411A

TP411

1K

R415

R416

(GREEN)

XRT
HREC

EMPH0
PCNT2
DCON
PCNT3
PBAULT

BATON
DCNT1
(OG)
STOP
(BLUE)
ELON

TP401

C401

0.1

R464
220K

C454

0.0022

GND

CAS

GND

R412
15K

TP413

I/O4
I/O3

OE

IC4

5
6
7
8

1K

24
23
22
21
20
19

A9
A8

18

A7

17

A6

16

A5

15

A4

14
13

TP4

TP4

H

• NOTES ON SCHEMATIC DIAGRAM can be found on page 28.

• The numbers 1 to 15 are waveform numbers shown in page 37.

1

23456

Figure 30 SCHEMATIC DIAGRAM (1/2)

– 30 –

MD-MT877/MD-MT877C

+

R463

100K

LCD ASS'Y

CNA01

7

5

4 3 2 1
SWA13
OPEN/CLOSE

DADATA
ADDATA
DFCK

BCLK
LRCK
ADPON
DAPON
OPTCNT
DIN
EMPH1

1

24

VCC

GND

2

23

I/O1

I/O4

3

22

I/O2

I/O3

4

21

WE

CAS

5

20

RAS

OE

6

19

N.C.

A9

A10

A8

18

7

A0

A7

17

8

A6

A1

16

9

A5

A2

10

15

A4

A3

11

14

VCC

GND

12

13

C202

7/6.3

IC202

IX2824AF

16MBIT

D-RAM

L202
10µH

VCC2R5V

2.7V

58X2404T

R411

EEPROM

100K

09

TP411A

TP411

1K

R415

D432

1SS372

(GREEN)

XRT
HREC

EMPH0
PCNT2
DCON
PCNT3
PBAULT

BATON
DCNT1
(OG)
STOP
(BLUE)
ELON

TP401

R416

C401

0.1

IC402

R412
15K

5
6
7
8

TP413

1K

TP404

TP405

+B

+B

+B

4
3
2
1

TP410

R413

OPEN
STOP
HPLAY
HREC

TP407

IC200

C200

1
2

1K

R464
220K

C454

0.0022

+B

+2.7V

C500

10/6.3

C511

0.1

8

7

SDTO

IC501

SDTI

10

9

5

R200

100K

4 3

2
1

5

1

IC404

GND

N7SZ86P5

GATE IC

IC821 CPH3413 N-CH MOS FET
IC822 IR3M14N DC/DC CONVERTER
I

C841 XC6372C281PR 2.8V UP CONVERTER
IC851 CPH3413 N-CH MOS FET
IC852 IR3M14N DC/DC CONVERTER

C210

0.1

VCC

IC404

5
4 3

RDATA

+4.5V

2.5V REGULATOR

+1.5V

C852

22/6.3

1

C859

R831
180K

IC873

62GR4522

43

N.C.

5

C837

1

C502

0.0022

C501

0.0022

C503

5

4 3 2 1

6

3.3/10

VSS

VDD

AINL

AINR

DEM0

DEM1

VCOM

AOUTL

LRCK

SCLK

MCLK

PWAD

AOUTR

PWDA

C505

11

16

14

12

13

15

0.001

C506

0.001

R441
120

(–)

678

0V

Q443

2SC4738 GR

0V

R445

10K

IC200

62GR2522

1

6

R442

2

5

820

4 3

Q442

RN4911

+2.7V

1
2

N.C.

C773

C774

0.22

1

D772
F10J2E

C776

1

D862

F10J2E

C863

1

C862

D861
F10J2E

D852

F10J2E

R855
180K

C856
150P

(CH)

C839

–2.7V

4.5V REGULATOR

2
1

C836

0.47

R857
560K
R832
180K

0.33

R826

3.9M
R825

390K

D851
F10J2E

R854

10K

R834

1.5M

R827
270K

C828

1

D822

D1FH3

HRB0103B

C823

220/4

C858

1

R824

10K

C826
82P(CH)

C825

1

D821

C822
22/6.3

D

S

C857

33P

(CH)

R853
270K

C827

82P

(CH)

R823
270K

D831

HRB0103B

C834

0.1

D

S

IC501
AK4551VT
AD/DA CONVERTER

VCCADDA

TP500

EMPH0

IC771

5

62GR2322

4 3

2.3V REGULATOR

D771

F10J2E

R871

10K

1

C775
1

IC851

G

IC852

ERRAMP

5

EO
EIN

6
7

EIP

VREF

8

ROSC

IC822

ERRAMP

5

EO
EIN

6
7

EIP

VREF

8

ROSC

HRB0103B

0.1

C833

IC821

G

RCAULT

D832

OPEN
+2.7V
DSPSTB
DSPSCK
DSPDAT
HREC
HPLAY
HKEY2
HKEY1
STOP

AUSCLK

IC871

1
2

S

Q R

RSFF

CMP

OSC

S

Q R

RSFF

CMP

OSC

C832

0.1
L821

10µH

+B

AUDATA

GND

GND

BUF

OUT

VCC

STAND

BY

CTRL

GND

BUF

OUT

VCC

STAND

BY

CTRL

R833

C821

3.3

47

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

–2.7V

INPGCK
INPGIN
MCPGIN

VCC

L851
10µH

C851

3.3

4
3
2
1

4
3
2
1

VCCMICOM

CN451

TP463
TP464

R501 470
R502 470

R758

100

R757

2.2K
C760

0.1
R732

47K

PBMUTE

BEEP

5
4 3

C860

1

C838

0.1

C830

C876

1

CNLAND1

1

1
2
3
4
5
6
7
8
9

10
11
12

LEDA03 CL190HBX

13
14

LEDA02 TLGU1008

14

C509 1

C510 1

R754
180K

C758

R761

390K

12 11 10

HP

BEEP

BIAS

LOGIC

CLK

LAT

R733
47K

R731
47K

PBAULT

AURESET

C771

47/6.3

IC871

1

TC7S86FU

EXCLUSIVE

OR GATE

C845

D842

0.1

HRB0103B

C846

0.1

R844

47

I

C841

D841

1

N.C.

F10J2E

2

C850

0.1

C842

33/6.3

C843

0.22

C848

1

4 3
5

IC842

C844

10/6.3

62GR2522

2.5V

REGULATOR

6

CA02

0.1

RA13

18K

RA14

18K

RA12

33K

R720

6.8K

11

10

12

9

LOUT

RIHP

ROUT

R702

100

DGND

C702

10/6.3

C764
1

C754

1

1

100K

RHPVEE

LHPVEE

C753

1

TP772

AUDIO AMP.

C847

L841

4.7

5
4 3

R850

22K

DCON

PCNT2

PLVBAT

BATON

CHGCNT

STDCK

N.C.

RIN

ATT

LPF

RLPFO

ATT

LLPFO

LIN

N.C.

C763
1

IC703

IR3R59N

C869
47/6.3

1

TP842

C841
1

R762

9 8 7 6 5 4 3 2 1

AMP&GAIN SEL.

RHPVCC

AMP&GAIN SEL.

LHPVCC

DAT

TP771

R841
100K

2
1

LPF

CA01

8

LIHP

VEE

R-CH

R–

L–

L-CH

R829

0.1

R719

6.8K

N.C.

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

100K

7

AGND

C701

10/6.3

L+ R+

R822
100K

LEDA04

TLOU1008

R712 6.8K

5

6

RI

VCC

R703
100K

R701

100

R765

15

R766

15

+4.5V

F841

0.4A

DC60V

HN1C01FU

1
2

R810
22K

1
2

RN4904

HN1C01FU

R282

47K

RA05

5.6K

C734

0.1
4 3 2 1

LI

C766

0.22

HN1C01 FU

TP841

Q806

6
5
4 3

R807
100K

R809
47K

Q253

Q821

1
2

R256
100K

R281

QA01

2SC4738GR

RA15

10K

RA16

330

R711 6.8K

C733

24

23 22 21 20 19 18 17 16 15 14 13

C703

0.01

R729 4.7K

C492

1

R816
100K

Q807

R828

2.2K
Q802

FDN339N

3

5.39V

C840
220/4

R253

33K
6
5
4 3

6
5
4 3

1K

0.1

IC701
IR3R54N
AUDIO
AMP.

D495

MA8075M

C765

0.22

ELON

R813

PLVDCI

DCEXT

2.2K

5

6

0.85V

2

0V0V0V

1

0V

4.65V

R808

560K

R252
560K

C252

0.1
R821

2.2K

5.38V

5.39V

1M

R257

RA01

5.6K
RA02

8.2K
RA03

18K
RA04

56K

RA06

8.2K

RA07

18K

RA08

56K

R728

1K

R730 4.7K

D496
MA8075M

L491
33

KEY

PLAY

R492
1K

D492
15AZ7.5Y

RKEY

RPLAY

R495

1K

_DCIN

4

3 2 1

0V

Q803
2SA17457

0.86V

1.3V

Q804

HN1C01 FU

R802
100K

Q805

2SA1832 GR

Q252

FTD2017

G2 G1

5

S2

6

S1S1S2

7

D

D

8

Q254
2SA1832 GR

4.81V

R255
560K

R258
330K

C274 0.1

R278

22

C292

0.01

R292
100K

R715
100K

C731

0.22
C721 3.3/10

R812

1
2

4
3
2
1

1.3V

SWA01 RECORD

SWA02 PLAY

SWA03 BASS

SWA04 EDIT

SWA05 DISPLAY
SWA06 VOLUME–

SWA07 VOLUME+
SWA08 STOP
SWA09 MODE

SWA10 FAST REVERSE

FAST FORWARD

SWA11
SWA12 ENTER

R717

1K

R710

Q711

47

RN1444 A

C713

2

3

0V 1.87V

1

1

0V
L-CH
R-CH

C712
100P
(CH)

R716
100K

C714

4.47V

1

R726

+B

39K

R727

8.2K

C722 3.3/10

D494

C491

15AZ7.5Y

0.1
L454

D491
015Z5.1Y

C451

0.022

+B

Q493

2.73V

2SA1832 GR

2.21V

R496

22

(–)

C493

0.47

C817

0.1
R818

47K

R882

10K
C881

0.027

R814

27K

R801

47K

6

R805

5

1M

4 3

R806
100K

R264

100

1.3V

Q251

2SA17457

R254
1M

R277

2.2K

C273

0.1

23

(–)

R817
100K

S-80814ALNP

D801
RB521S30

OUT

1

VDD

IC801

Q261

HN1C01 FU

1
2

R263
100K

R251
22

0.78V

S-80808LNP

RESET

R274
56K

R275

15K
R276
120K

4 3
5

IC271
75S54FU
OP AMP.

100K

R881
18K

R815
100K

R803

R259

2.2K
C253

0.01

R291

2.2K

1K

R718
1K

C715

0.1

L702

L703

C711
100P(CH)

Q721

4.43V

R723

6.8K

C723

0.001

L452

RDATA

D493
015Z5.1Y

PCNT3

0V

Q825

1

0V

DTC144 EE

IC801

RESET

VSS

3 2

R261

6

1M

5
4 3

OUT

1

VSS

VDD

IC251

C272

0.1

-

2

+

1

3.91V

C726

3.3/10

N.C.

C251

R713
10K

R714

C724

0.001

R262
330K

0.1
4

3 2

10K

L453

N.C.

R725

L457

R273

100

R724

6.8K

L-CH
R-CH

NI-MH

L704

L456

DC-IN

Q801

RN4904

1 4
2

R271
470K

47K

R272
470K

C291

2SD1979 S

RIPPLE
FILTER

C725

3.3/10

L714
L713
L712
L711

L458

R804
330K

1

LCD/KEY PWB-B

TP706

7

TP708

VCC

9

TP707

Vout

8

GND

N.C.

6

TP701

1

TP702

L

2

TP703

R

3

TP704

GND

4

TP705

5

J701
OPTICAL/

Q721

LINE

TP714

4

TP713

2

TP712

3
1

TP711

J702
MIC IN

TP726

6

TP725

5

TP722

2

TP724

4

TP723

3

TP721

1

TP727

7

TP728

8

J703
REMOTE
CONTROL/
EARPHONES
TERMINAL

EXTENSION
TERMINAL,+

TP801

6
5
4 3

BATTERY
TERMINAL,+
EXTENSION
TERMINAL,+

TP803

BATTERY

TERMINAL,–

TP804

C270

1

CONTROL
TERMINAL

TP805

GND

TERMINAL,–

TP806

7

8 9 10 11 12

Figure 31 SCHEMATIC DIAGRAM (2/2)

– 31 –

MD-MT877/MD-MT877C

MAIN PWB-A (TOP VIEW)

A

1

C251

R821

B

FROM

OPTICAL

PICKUP
P35 9-G

FLEXIBLE PWB

Q821

C253

R259

22

4

R256

Q254

R255

C272

R258

R254

R275

C270

R274

C830

11

C860

C

D

FROM

MECHANISM

FLEXIBLE PWB

P35 9-A

IC822

5

R824

C857

R823

R827

C827

R826

R825

C826

C856

R833

TP487A

D832

C838

C836

D831

1

1
3
4

IC873

C844

5

C837

R841

IC251

R257

R276

R273

C274

R809

4

IC852

R854

R856

C832

C833

1

IC842

354

C848

Q443

R272

R277

R855

R271

4

C273

R822

R853

C834

R278

885

R857

C828

R408

R251

Q261

R263

13

IC271

5

R828

R832

C876

3
4

IC871

R264

R810
C839

R834

R871

C825

D822

R406

FP67

R262

Q802

Q806

3
4

D431

1

5

R405

Q804

R805

R261

R829

IC431

2

R831

R425

R423

FP66

R407

TP105A

R445

51

Q442

FLEXIBLE PWB

E

FROM

LCD/KEY PWB

P34 3-A

11

14

C511

C503

C500

C773

L204

R766

R765

F

SW401
EJECT

FLEXIBLE PWB

G

1

13

L458

87

4

L454

L457

L452

2

R767

D491

R768

D495

L453

IC771

5

1

C774

R207

12

C765

13

C492

D496

3

1

R442

4

C766

C753

D492

R492

5

R441

3

10

15

L491

D494

14

CN451

1

IC703

20

12

C491

L456

6

13

5

R762

15

C760

R757

R720

10

1

24

R712

C703

R731

R804

Q803

R807

1

C431

D432

R733

20

3

C454

IC801

4

R881

R806

R882

R803

R808

Q805

R431

R402

50

55

60

65

70

75

IC404

R461

R463

R464

R404

C909

R732

C910

C451

R754

R758

R761

C712

C734

5

IC701

R703

Q801

2

1

Q825

C881

FP59
CK111

R424

C130

80

R462

C906
C907

R903

C902

C754

R719

C733

1

24

R730

R812

R802

R816

45

4

R904

C758

C711

R711

R801

Q807

22

3

R813

C401

85

L713

2

C722

1

D801

C817

R818

R814

40

IC401

1

5

C605

C905

C908

R909

R907
R908

R905

C721

R729

L711

R817

R815

FP31

C165

FP32

35

C604

16

15

17

20

25

30
31

323540

R906

C723

C724

L712

CN101

30

95

C603

4

4

Q721

R161

100

C601

10

IC601

R723
R724

L714

C725

R725

R726

26

20

15

10

5

1

R414

C602

C901

25

R416

R413

5

45

6

L704

4

R716

R714

5

1

CK113

R422

4

R415

5

48

C292

R728

R727

24

1

CK112

L103

70

IC402

Q901

1

64

60

55

50

49

C912

R292

C731

C726

R715

CK114

51 50

76

1

8

C911

Q711

L702

L703

C714

R713

C212

R222

55

60

65

75

C713

R411

11

R412

1

2

3

1

D651

C353

R361

IC202

C211

45

TP411A

CN601

C357

5

IC354

1

C291

19

6

40

IC201

8580

2

R291

7

XL201

C204

3

C361

35 30

90

R204

C203

C210

C652

8

R920

14

5

8

C351

C209

C201

95

100

IC200

C200

5

1

R200

8

IC651

1

10

IC351

IC353

D351

3

R351

1318

12

26

25

12

20

15

10

5

1

TP201A

C207

4

R206

C205

R205

5

4

7

5

1

4

1

C354

J703

REMOTE CONTROL/

EARPHONES

J702

MIC IN

: Through-hole where the top, bottom and +B patterns are connected.
: Through-hole where the top, bottom and hround 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 37.

1

23456

Figure 32 WIRING SIDE OF P.W.BOARD (1/4)

– 32 –

J701

OPTICAL/LINE IN

MAIN PWB-A (BOTTOM VIEW)

TP109

TP108

CK224

TP207

TP204

TP131

TP408

R710

7

TERMINAL,-

CK225

TP209

R718

R717

8

GND

TP102

TP101

CK207

TP208

L821

D821

C822

TP708

9

10

11

CONTROL

TERMINAL

TP206

C202

TP805

R282

L202

R281

TP200

R151

Q103

C100

C102

C114

TP144

R136

R135
R131
R132

R134

1

9

C858

G

S

12

C852

C851

C109

C103

C112

R111

48

1

5

10

13

TP201

C106

C111

45

IC101

15 20

R138

R133

TP610

TP658

TP205

D852

D

IC851

C151

C110

C107

TP130

TP352

C859

TP806

L100

C113

40

R137

C133

TP411

TP660

TP655

TP100

C132

C108

R112

37

35

30

24 25

R140

TP659

TP657

TP652

TP702

D851

C840

L851

TP139
CK108

36

R101

C121

R139

CK202

TP661

TP651

TP654

TP707

C131

CK102

TP132

R102

C122

TP210

TP706

TP351

TP203

C123

TP407

TP653

CK201

C715

TP703

TP701

CK222

TP133

R104

R103

CK203

C124

TP409

TP656

TP452

TP113

TP107

TP401

TP405

14

TP106

TP105

TP416

L601

C600

C702

C701

TP705

15

2

TP114

TP111

TP110

TP115

TP415

TP455

TP417

CK205

TP456

SG

D

C821

L602

C823

TP704
R702

EXTENSION

TERMINAL,+

TP118

TP116

TP453

CK206

TP454

TP460

IC821

TP211

L603

C869

TP487

TP120

TP119

TP117

TP457

L608

C771

TP122

TP121

TP451

CK204

C608

L604

R701

TP801

TP404

TP462

TP103

C172

TP461

D842

C846

C776

TP412

TP714

TP712

TP711

TP459

C847

D772

TP713

TP804

TP402

D841

C863

TP725

TP212

TP458

C171

R844

C845

D771

TP726

TP721

TP413

TP463

TP500

TP771

EXTENSION

BATTERY

TERMINAL,+

TP803

TP841

TP410

C252

TP400

L171

TP464

L841

C841

D861

C775

D862

C862

TP202

TP772

TP723

F841

0.4A,

DC60V

TP842

R850

4

5

C506

C505

R252

XL401

C850

C843

8

IC501

9

R502

C501

C502

Q251

R253

D493

10

C764

R501

MD-MT877/MD-MT877C

BATTERY TERMINAL,+

Q252

Q253

C493

C842

15

C763

C510

3

1

16

R496

1

C509

3

4

6
8
7

5

BATTERY TERMINAL,-

R403

TP901

TP728

R495

Q493

IC841

5

TP727

TP724

TP722

TP406

SW901

DISC

PROTECT

3

1

2

J701

OPTICAL/LINE IN

7

8 9 10 11 12

J702

MIC IN

J703

REMOTE CONTROL/

EARPHONES

Figure 33 WIRING SIDE OF P.W.BOARD (2/4)

– 33 –

MD-MT877/MD-MT877C

LCD/KEY PWB-B(TOP VIEW)

A

TO MAIN PWB

B

C

1

CN451

P32 2-F

14

FLEXIBLE

PWB

D

LCD/KEY PWB-B(BOTTOM VIEW)

E

LEDA04

P35 7-H

LCD ASS'Y

LEDA03

F

LEDA02

SWA02

PLAY

SWA08

STOP

RA12
RA14

RA13

7

1

SWA12

ENTER

SWA05

DISPLAY

CNA01

CA02

SWA03
BASS

RA05

CA01

RA08

SWA04
EDIT

RA06

RA07

RA04

RA03

SWA13
OPEN/
CLOSE

RA01

RA02

RA16

RA15

QA01

G

SWA01

RECORD

SWA09

MODE

SWA07

VOLUME+

H

SWA11

FAST FORWARD

SWA06
VOLUME–

SWA10
FAST
REVERSE

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

1

23456

Figure 34 WIRING SIDE OF P.W.BOARD (3/4)

– 34 –

MD-MT877/MD-MT877C

M903

LIFT MOTOR

M902

SLED MOTOR

CN601

TO MAIN PWB

P32 2-D

MECHANISM

FLEXIBLE PWB(5)

MAGNETIC HEAD(3)

M901

SPINDLE MOTOR

LCD ASS'Y(217)

CN101

TO MAIN PWB

P32 2-B

OPTICAL PICKUP(4)

CNA01

TO LCD/KEY PWB

P34 4-F

7

8 9 10 11 12

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

– 35 –

MD-MT877/MD-MT877C

IC101

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

PIN
NO.

1
2
3
4
5
6
7

8

9

1
2

4
5
6
7

9

1
2
3
4
5
6

IC202

3

8

Q801

VOLTAGE

0.26 V

0.26 V

0.26 V

0.26 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

0.26 V

1.48 V
0 V
0 V

2.49 V

2.49 V

1.78 V
0 V

1.25 V

1.25 V

0.26 V

1.25 V

1.25 V

1.3 V

1.28 V

0.7 V

2.49 V

1.51 V
0 V

1.25 V

0.28 V

0.28 V

1.25 V

0.28 V

0.28 V

VOLTAGE

2.71 V

1.59 V

1.66 V

2.47 V

1.85 V
0 V

1.07 V

1.39 V

0.55 V

0.55 V

0.55 V

2.71 V
0 V

0.58 V

0.94 V

0.94 V

0.94 V

0.94 V

1.07 V

1.8 V

2.01 V

1.61 V

1.61 V
0 V

VOLTAGE

0.85 V

0.9 V

0.9 V
0 V
0 V

0.77 V

PIN
NO.

10
11
12
13
14

PIN
NO.

1
2
3
4

PIN
NO.

1
2
3

PIN
NO.

1
2
3
4
5
6

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

1
2

3
4
5
6
7

8
9

1
2
3
4
5
6
7
8
9

IC351

IC431

Q802

Q804

VOLTAGE

0.79 V

2.49 V

1.3 V
0 V

2.49 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V

1.25 V
1 V

1.55 V
0 V
0 V

1.24 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V

0.55 V

0.55 V

0.55 V

1.39 V

1.06 V

2.5 V

0.58 V

0.94 V

0.94 V

0.94 V

0.94 V

1.8 V
0 V

2.02 V

1.6 V

1.6 V

1.07 V

1.85 V

2.48 V

1.65 V

1.59 V

1.07 V

2.39 V

1.88 V

1.13 V

VOLTAGE

0 V
0 V

4.45 V
0 V
0 V

4.45 V
0 V

1.13 V

4.45 V
0 V

1.13 V

4.45 V
0 V

4.51 V

VOLTAGE

22.5 V

2.5 V
0 V
0 V

VOLTAGE

0 V

1.3 V

0.85 V

VOLTAGE

0 V
0 V
0 V
0 V

0.58 V

0.86 V

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.

PIN
NO.

PIN
NO.

PIN
NO.

1
2
3
4
5

1
2
3
4
5

1
2

3
4
5
6
7

8

1
2
3
4
5
6

IC404

IC200

IC353

Q442

VOLTAGE

1.24 V
0 V
0 V
0 V

2.5 V
0 V
0 V
0 V
0 V
0 V
–

1.55 V
0 V

0.67 V

0.67 V

2.7 V

1.24 V
–
0 V

1.24 V

1.24 V
0 V
0 V
0 V

1.23 V

1.23 V

1.23 V
0 V
0 V
0 V
0 V

2.5 V
0 V
0 V

1.25 V

2.5 V

2.5 V
0 V

2.5 V
–

0.8 V

0.8 V

1.25 V

0.7 V

1.25 V

1.4 V

0.7 V

2.49 V

2.49 V
0 V

VOLTAGE

2.5 V

2.5 V
0 V
0 V

2.5 V

VOLTAGE

0 V

2.7 V

1.34 V
0 V

2.5 V

VOLTAGE

2.7 V
0 V
0 V
0 V
0 V
0 V
0 V

2.7 V

VOLTAGE

5.17 V

4.66 V

4.66 V

1.8 V
0 V
0 V

VOLTAGE

VOLTAGE

–

2.49 V

2.49 V

0.7 V

0.8 V
–
–
–
–
–
–

2.5 V
0 V
0 V

2.1 V

2.68 V

2.57 V

2.5 V
0 V

2.49 V

2.49 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V

2.38 V

2.49 V

2.5 V
0 V
0 V

2.47 V

2.49 V
0 V

2.44 V
0 V
0 V
0 V
–

2.34 V

1.47 V

2.49 V

2.49 V

2.49 V

2.49 V

IC873

VOLTAGE

0 V

7.43 V

2.5 V
0 V

4.49 V

IC841

VOLTAGE

1.28 V

2.8 V

1.36 V

1.28 V
0 V

IC354

VOLTAGE

–
–
0 V
0 V
0 V

Q252

VOLTAGE

1.3 V

1.3 V

1.3 V

5.38 V

4.94 V
–
–

1.3 V

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.

PIN
NO.

PIN
NO.

PIN
NO.

1
2
3
4
5
6

1
2
3
4
5
6

1
2
3
4
5
6

1
2
3
4
5
6

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

Preform the measurement on
the IC401 pin 37 in the TEST
mode with GND short-circuited.
(LCD is in "TEST" state.)

PIN
NO.

1
2
3
4
5

PIN
NO.

1
2
3
4
5

PIN
NO.

1
2
3
4
5

PIN
NO.

1
2
3
4
5
6
7
8

VOLTAGE

0.27 V

0.98 V

2.5 V

2.5 V

2.5 V

2.5 V

2.39 V
0 V

2.4 V

2.5 V

2.5 V

2.5 V

1.27 V
0 V

0.64 V
0 V

1.6 V

1.97 V
0 V
0 V
0 V

1.4 V
0 V
0 V

1.33 V
0 V

1.4 V
0 V
0 V
0 V

2.49 V
0 V

2.47 V

2.47 V
0 V

2.49 V
0 V
0 V

2.49 V
0 V

2.47 V

2.47 V

2.5 V

2.49 V
0 V

2.5 V

2.49 V
0 V

2.49 V

2.49 V

Q103

VOLTAGE

2.5 V

2.5 V

0.2 V

2.5 V

2.5 V

2.5 V

Q261

VOLTAGE

0 V
0 V
0 V
0 V

0.55 V

1.15 V

Q253

VOLTAGE

5.39 V
0 V
0 V
0 V

2.5 V

5.37 V

Q806

VOLTAGE

0 V

0.56 V

4.6 V
0 V
0 V
0 V

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.

1

2

3

4

PIN
NO.

1

2

3
4
5

PIN
NO.

1

2

4

5

6

1
2
3
4
5
6
7
8
9

3

IC601

IC251

IC271

Q807

VOLTAGE

0 V
0 V
0 V

2.47 V

2.47 V
0 V
0 V
0 V
–
0 V
0 V
0 V
0 V

1.3 V
0 V
0 V
0 V
0 V
0 V
0 V
–
0 V

0.8 V
0 V

0.8 V

2.46 V
0 V

0.65 V
0 V
0 V

2.5 V

2.5 V

2.5 V
0 V
0 V
0 V

1.67 V
0 V

1.66 V

1.3 V

1.62 V
0 V

1.62 V

1.3 V

2.5 V

2.5 V

7.25 V

1.24 V

6.11 V

1.24 V

3.72 V

1.24 V
0 V
0 V
0 V

1.3 V
0 V
0 V
0 V
0 V

1.3 V
0 V
0 V
0 V

VOLTAGE

1.3 V

1.3 V
–
0 V

VOLTAGE

1 V
0 V

0.66 V
1 V

2.7 V

VOLTAGE

0 V
0 V

2.5 V
–
–

2.46 V

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
6
7
8

PIN
NO.

1
2
3
4
5
6
7

PIN
NO.

1
2
3
4
5

1
2
3
4
5
6
7
8
9

1
2
3
4
5
6
7

8

9

8

IC701

IC703

IC402

IC651

IC771

VOLTAGE

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

-2.48 V
0 V
0 V

2.29 V

0.85 V
0 V
0 V
0 V

VOLTAGE

0 V
0 V
0 V
0 V
0 V

1.76 V

-1.76 V
0 V

1.76 V
0 V

0.88 V
0 V

2.27 V
0 V
0 V

1.76 V
0 V

-1.76 V

-1.76 V
0 V
0 V
0 V
0 V
0 V

VOLTAGE

0 V

2.5 V
0 V
0 V

2.5 V
0 V

2.5 V

2.5 V

VOLTAGE

2.7 V
0 V
0 V
0 V
–

0.5 V

0.5 V
0 V

VOLTAGE

0 V

2.7 V

2.7 V
0 V

2.3 V

PIN
NO.

10
11
12
13
14
15
16

PIN
NO.

PIN
NO.

PIN
NO.

PIN
NO.

PIN
NO.

PIN
NO.

PIN
NO.

PIN
NO.

1
2
3
4
5
6
7
8
9

1
2
3
4
5

D
S
G

1
2
3
4
5
6
7
8

1
2
3
4
5

1
2
3
4

D
S
G

1
2
3
4
5
6
7
8

1
2
3
4
5
6

IC501

IC842

IC851

IC852

IC871

IC801

IC821

IC822

Q821

VOLTAGE

0 V
0 V
0 V
0 V

2.3 V
0 V
0 V
0 V
0 V

1.24 V

1.22 V

1.23 V
0 V
0 V

0.27 V

0.31 V

VOLTAGE

0 V

2.8 V

2.6 V
0 V

2.5 V

VOLTAGE

1.28 V
0 V

0.55 V

VOLTAGE

1.28 V

2.8 V

0.47 V
0 V

1.17 V

1.17 V

1.16 V

1.26 V

VOLTAGE

1.24 V

2.49 V
0 V

1.25 V

2.5 V

VOLTAGE

0 V

0.8 V
–
0 V

VOLTAGE

1.28 V
0 V

0.3 V

VOLTAGE

1.25 V

2.8 V

0.7 V
0 V

1.2 V

1.17 V

1.16 V

1.25 V

VOLTAGE

0 V

0.5 V
0 V
0 V

2.5 V

5.37 V

– 36 –

MD-MT877/MD-MT877C

WAVEFORMS OF MD CIRCUIT

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

5
6

7

8

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

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

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

10
11

9

Stopped

CH1=1V

TP201
(EFMMON)

1

TP210

(TEMON)

T

2

TP209

(TOTMON)

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

DC 10:1

T

CH2=2V

DC 10:1

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

CH3=500mV

DC 10:1 (2ms/div)

Main : 10K
Zoom : 10K

1994 / 12 / 16 01:03:40

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

2ms/div

ENV

9

10
11

14

Stopped

CH1=2V

DC 10:1 (50ms/div)

T

IC201(25)

12

1

(SPDRR)

2

VM

13

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

Stopped

CH1=2V

DC 10:1 (2ms/div)

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)

CH2=2V

DC 10:1

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

CH2=2V

DC 10:1

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

CH2=2V

DC 10:1

T

T

Main : 10K
Zoom : 10K

CH3=500mV

DC 10:1

Main : 10K
Zoom : 10K

1994 / 12 / 15 23:31:21

50ms/div

=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

Stopped

CH1=2V

ENV

1

10

1
10
12

13

9

10

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)

4

VM

=Filter= =Offset= =Record Length=

TP201

(EFMMON)

TP210

(TEMON)

Smoothiing : OFF
BW : FULL

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

Stopped

CH1=2V

DC 10:1

1

T

2

CH2=2V

DC 10:1

OFF

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

CH2=2V

DC 10:1

CH2=2V

DC 10:1

CH3=2V

DC 10:1

CH3=2V

DC 10:1

Main : 10K
Zoom : 10K

CH3=1V

DC 10:1

Main : 10K
Zoom : 10K

T

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

1s/div

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

9

ENV

10

ENV

Stopped

CH1=2V

DC 10:1 (500ms/div)

TP201

T

(EFMMON)

1

=Tracel= P-P 1.280V

=Filter=

=Offset= =Record Length=
CH1 : 0.000V
CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V

Stopped

CH1=2V

CH2=2V

DC 10:1

DC 10:1

=Filter= =Offset= =Record Length=

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

TP210

(TEMON)

Smoothiing : OFF
BW : FULL

T

1

Smoothiing : OFF
BW : FULL

CH3=2V

DC 10:1 (1s/div)

Main : 1K
Zoom : 1K

Main : 10K
Zoom : 10K

1994 / 12 / 16 01:23:16

500ms/div

MORM:200MS/s

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

1994 / 12 / 15 08:39:46

1s/div

NORM:1kS/s

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

3

TP121

4

(T-)

15

=Filter= =Offset= =Record Length=

Smoothiing : OFF

CH1 : 0.000V

BW : FULL

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

Main : 4K
Zoom : 4K

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

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

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

10K

Measurement

TP

1000P

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

– 37 –

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-MT877/MD-MT877C

TROUBLESHOOTING

Use the test mode which indicates trouble causes before repairing the unit. This mode records maximum 2 past error
causes as codes. Refer them for repairing.

Preparations

If dusts and foreign materials are accumulated on the pickup lens, playback sounds can be skipped or the TOC (Table of Contains)
can't be displayed. Clean the object lens and check the playback. When lens are dirty, do the following.
Turn off the power and wipe lens softly with a cleaning paper and a little marketing so as not to damage them.
Do not touch lens with bare hands.

If the unit doesn't work.
If the unit doesn't start after cleaning the pickup objects lens lens, check the unit as follows.

Is the power supply turned on when the remote control
button or 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 ?

• Power is not turned on when the / button is
pressed.

No

Is power turned on when the remote control button is
pressed ?

No

Yes

Yes

No

No

No

No

No

Perform the check stated in item "Power is not turned on
when the / 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".

• If "HOLD" appears, press and hold down STOP on
the main unit and cancel the HOLD mode.

Normal.

Is operation normal when the main body button is pressed ?

No

Does the pin 63 of IC401 oscillate ?

Yes

No

– 38 –

Check the remote control, headphone terminals on the
main unit (J703), IC401 and IC404.

Replace XL401.

• Abnormal display.

MD-MT877/MD-MT877C

Are the pin 2 (VCC) and pin 12, 13 (GND) normal ?

Yes

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

No

Is waveform output from IC401 pins 31 to 33 ?Is waveform output from CN451 pins 3 to 5 ?

Check between IC401 and
CN451.

• Audio playback clrcult.

In the normal playback mode, LCD play time display functions, but no audio is heard.
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 J703 pins 3 and 4.

Yes

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 for defective solder joint of audio signal line between
IC703 and J703.

Yes

No

Check the periphery of IC401.

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 15 ?

Yes

Does waveform appear on IC601 pins 7, 10 and 12 ?

Yes

Replace the spindle motor.

No

No

No

Check the IC201 periphery.

Replace IC601.

L608, IC201, IC601, CN601 and flex, etc. soldering check.

– 39 –

MD-MT877/MD-MT877C

• 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 2, 3, 6, and 7 of
IC651, pins 4 and 5 of CN601. Check whether disc is record­inhibited.

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

No

Does level of pins 43 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 in head drive flexible PWB,
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.

– 40 –

MD-MT877/MD-MT877C

FUNCTION TABLE OF IC

IC401 RH-iX0419AWZZ :System Microcomputer (IX0419AW) (1/2)

Pin No.

1 PE5 SYRS Output System LSI register selection output.
2 PE6 _SYRD Output System LSI read enable output.
3 PE7 _SYWR Output System LSI write enable output.
4-11 PD0-PD7 SYD0-SYD7 Input/Output System LSI parallel data bus.
12 CVCC CVCC Input Power supply of internal voltage drop circuit.
13 PC0 PCLAT Output Record audio IC data latch output.
14 Vss VSS — Ground potential.
15 PC1 _MCPGI Input Microphone plug insertion detection input.
16 PC2 _INPGI Input Line/digital plug insertion detection.
17 PC3 INPGCK Input Line/digital plug type detection.
18 PC4 RCPCNT Input/Output Record circuit power control output.
19* PC5 TEST1 Input Test mode setting input 1.
20* PC6 TEST0 Input Test mode setting input 0.
21 PC7 JPNP Input Kana conversion/Kana input existence/nonexistence discrimination.
22 PB0 OPICGA Output P.U detection sensitivity switching output.
23 PB1 RFRCNT Output RF_LSI power supply ON/OFF control output.
24 TIOCC3 BUZOUT Output Beep sound pulse output.
25 PB3 SGAIN Output RF amp gain pllarity switching output.
26 PB4 DISCP Output RF amp TE polarity switching output.
27* TIOCB4 MCMON Output Internal operation status monitor.
28 PB6 RACLK Output Audio IC data clock output.
29 PB7 RADAT Output Audio IC serial data output.
30 PA0 CHGCNT Output Charge control.
31 TxD2 DSPDAT Output Unit indication data output.
32 PA2 DSPSTB Output Unit display strobe output.
33 SCK2 DSPSCK Output Unit indication data clock output.
34 P10 PBOPON Output Audio IC output stage control output.
35* P11 P11 Output Reserve
36 P12/TCLKA CIN Input Track cross signal/focus drive detection.
37 TCLKB SPIN Input Spindle motor FG pulse detection input.
38 IRQ0 _DINT Input System LSI interruption.
39 P15 DISCPR Input Disc record inhibition switch input.
40 IRQ1 ARQD Input Disk cap opens and closes detection/it is started and required.
41* P17 P17 Output Reserve
42 AVSS AVSS — A/D and D/A converter ground potential.
43 DA1 LDVAR Output P.U. laser power setting output.
44* DA0 PA0 Output Reserve
45 AN7 RKCNG Input Remote control button operation detection input.
46 AN6 TEMP Input Ambient temperature detection input.
47 AN5 HKEY2 Input Unit button operation detection input 2.
48 AN4 HKEY1 Input Unit button operation detection input 1.
49 AN3 RKEY Input Remote control button operation detection input.
50 AN2 STDCK Input Lithium battery voltage detection input.
51 AN1 PLVDCI Input DC IN voltage detection input.
52 AN0 PLVBAT Input DC voltage detection input.
53 Vref VREF — A/D and D/A converter reference voltage.
54 AVCC AVCC Input A/D and D/A converter positive power supply.
55 MD0 MD0 Input Operation mode selection input 0.
56 MD1 MD1 Input Operation mode selection input 1.
57* OSC2 OSC2 — Sub clock (not used).

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

– 41 –

MD-MT877/MD-MT877C

IC401 RH-iX0419AWZZ :System Microcomputer (IX0419AW) (2/2)

Pin No.

58 OSC1 OSC1 — Sub clock.
59 RES _RESET Input Microcomputer hard reset input.
60 NMI DCIN Input DC IN edge detection.
61 STBY _STBY Input Microcomputer standby input (not used).
62 VCC VCC Input Positive power supply.
63 XTAL XTAL — Crystal connection terminal.
64 Vss VSS — Ground potential.
65 EXTAL EXTAL — Crystal connection terminal.
66 FWE FWE Input Flash write enable.
67 MD2 MD2 Input Operation mode selection input 2.
68 PF7 _EJSW Input Ejection lever operation detection input.
69 PF6 SLCNT3 Output Stepping control 3.
70 PF5 SLCNT2 Output Stepping control 2.
71 PF4 SLCNT1 Output Stepping control 1.
72 PF3/ADTRG _RPLAY Input Remote control PLAY button operation detection input.
73 PF2 SENSE Input System LSI servo sense input.
74 PF1 _FOK Input Focus OK signal input.
75 FP0/IRQ2 _DCEXT Input DC-IN detection (level).
76 TxD0 RMDAT Output Remote control indication data/PC link data output.
77 RxD0 PCLDI Input PC link data input.
78* SCK0 SCK0 Output Serial I/O clock output (not used).
79 P33 _ELON Output EL lighting control output L.
80 P34 LEDCTB Output LED lighting control (Blue).
81 P35 _STOP Input Unit stop button control detection input.
82 P36 LEDCTR Output LED lighting control (Orange).
83 P77 DCNT Output Mechanism driver enable output.
84 P76 BATON Output Battery power supply line ON/OFF.
85 P75 LDON Output P.C. laser ON/OFF control output.
86 P74 PBLAT Output Audio PC data clock output.
87 P73 PCNT3 Output _DC IN input control output.
88 P72 DCON Output DC power supply line ON/OFF.
89 P71 PCNT2 Output START Tr ON/OFF.
90 P70 EMPH0 Output Audio output emphasis control 0.
91 PG0/IRQ6 _PLAY Input Unit PLAY button operation detection input.
92 PG1/IRQ7 _REC Input Unit REC button operation detection.
93 PG2 _XRST Output System LSI hard reset output.
94 PG3 CKSTP Output Microcomputer standby operation monitor.
95 PG4 LEDCTG Output LED lighting control (Yellow-green).
96 PE0 _EPCS Output EEPROM chip selection output.
97 PE1 EEPD Input/Output EEPROM serial data input/output.
98 PE2 EEPK Output EEPROM serial clock output.
99 PE3 EPRT Output EEPROM write protection control output.
100 PE4 PCNT1 Output System power supply ON/OFF control output.

Port Name

Terminal Name Input/Output

Function

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

– 42 –

MD-MT877/MD-MT877C

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

Pin No.

56* EXPORT4
57 EXPORT5 LDCNT1 Output Recording head raising-lowering control output 0. See the separate table *3.
58 EXPORT6 LDCNT2 Output Recording head raising-lowering control output 1. See the separate table *3.
59 EXPORT7 EMPH1 Output Audio emphasis control output 1. See the separate table *2.
78 EXPORT3 HDON Output Recording head. 'H': Record electric current
79 EXPORT2 OPTCNT Output Optical digital input circuit ON/OFF control. 'H': Circuit operation ON
80 EXPORT0 DAPON Output D/A converter operation control output. 'H': Operation ON
81 EXPORT1 ADPON Output A/D converter operation control output. 'H': Operation ON

Port Name

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

*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)

Terminal Name Input/Output

Undecided justice

Output Not used Not used

*2: List of EMPH port settings

Details

EMPH1 EMPH0

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

Function

Details

Remarks

*3: List of LDCNT port settings

LDCNT2

LDCNT1

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

Details

– 43 –

MD-MT877/MD-MT877C

— M E M O —

– 44 –

PARTS GUIDE

PORTABLE MINIDISC RECORDER

MD-MT877(S)

MODEL MD-MT877C(S)

MD-MT877/MD-MT877C

“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-MT877/MD-MT877C

NO.

PARTS CODE

PRICE
RANK

DESCRIPTION

INTEGRATED CIRCUITS

IC101 VHIIR3R58M/-1 J AM RF Signal Processor,IR3R58M
IC200 VHI62GR2522-1 J AG 2.5V Regulator,62GR2522
IC201 VHILR378161-1 J BQ Endec/Servo/Atrac,LR378161
IC202 RH-IX2824AFZZ J AX 16MBit D-RAM,IX2824AF
IC251 VHIS80808LN-1 J AE Reset,S-80808LNP
IC271 VHI75S54FU+-1 J AG OP AMP,FT75S54FU
IC351 VHI74ACT02T-1 J AE Head Driver,74ACT02FT
IC353 VHIFTD2005/-1 J AG Head Driver,FTD2005
IC354 VHICPH5608/-1 J AH Head Driver,CPH5608
IC401 RH-IX0419AWZZ J BE System Microcomputer,

IC402 VHI58X2404T-1 J AF EEPROM,58X2404T
IC404 VHIN7SZ86P5-1 J AE Gate IC,N7SZ86P5
IC431 VHIS80820LN-1 J AD Reset,S-80820LNP
IC501 VHIAK4551VT-1 J AU AD/DA Converter,AK4551VT
IC601 VHIBD6640KV-1 J BA Moter Drive,BD6640KV
IC651 VHILB1938T+-1 J AL Motor Drive,LB1938T
IC701 VHIIR3R54N/-1 J AQ Audio Amp.,IR3R54N
IC703 VHIIR3R59N/-1 J AN Audio Amp.,IR3R59N
IC771 VHI62GR2322-1 J AF 2.3V Regulator,62GR2322
IC801 VHIS80814LN-1 J AE Reset,S-80814ALNP
IC821 VSCPH3413++-1 J AE N-ch MOS FET,CPH3413
IC822 VHIIR3M14N/-1 J AK DC/DC Converter,IR3M14N
IC841 VHI6372C281-1 J AH 2.8V UP Converter,

IC842 VHI62GR2522-1 J AG 2.5V Regulator,62GR2522
IC851 VSCPH3413++-1 J AE N-ch MOS FET,CPH3413
IC852 VHIIR3M14N/-1 J AK DC/DC Converter,IR3M14N
IC871 VHITC7S86FU-1 J AE Exclusive or Gate,TC7S86FU
IC873 VHI62GR4522-1 J AG 4.5V Regulator,62GR4522

IX0419AW

XC6372C281PR

TRANSISTORS

Q103 VHIFDG312P/-1 J AD P-ch Power MOS,FDG312 P
Q251 VS2SA17457/-1 J AB Silicon,PNP,2SA17457
Q252 VSFTD2017++-1 J AL N-ch MOS FET,FTD2017
Q253 VHIRN4904//-1 J AD Power Select Charge Drive,

Q254 VS2SA1832GR-1 J AC Silicon,PNP,2SA1832 GR
Q261 VHIHN1C01FU-1 J AD Power Transistor,HN1C01 FU
Q442 VSRN4911+++-1 J AD Digital Transistor,RN4911
Q443 VS2SC4738GR-1 J AC Silicon,NPN,2SC4738 GR
Q493 VS2SA1832GR-1 J AC Silicon,PNP,2SA1832 GR
Q711 VSRN1444A//-1 J AC Digital,NPN,RN1444 A
Q721 VS2SD1979S+-1 J AC Silicon,NPN,2SD1979 S
Q801 VHIRN4904//-1 J AD Power Select Charge Drive,

Q802 VSFDN339N++-1 J AG N-ch MOS FET,FDN339 N
Q803 VS2SA17457/-1 J AB Silicon,PNP,2SA17457
Q804 VHIHN1C01FU-1 J AD Power Transistor,HN1C01 FU
Q805 VS2SA1832GR-1 J AC Silicon,PNP,2SA1832 GR
Q806,807 VHIHN1C01FU-1 J AD Power Transistor,HN1C01 FU
Q821 VHIHN1C01FU-1 J AD Power Transistor,HN1C01 FU
Q825 VSDTC144EE/-1 J AB Digital,NPN,DTC144 EE
Q901 VSRN1104///-1 J AB Digital,NPN,RN1104
QA01 VS2SC4738GR-1 J AC Silicon,NPN,2SC4738 GR

RN4904

RN4904

DIODES

D351 VHDSBE803//-1 J AD Silicon,SBE803
D431 VHD1SS361//-1 J AB Silicon,1SS361
D432 VHD1SS372//-1 J AD Silicon,1SS372
D491 VHE015Z5R1Y-1 J AD Zener,5.1V,015Z5.1Y
D492 VHE15AZ7R5Y-1 J AC Zener,7.5V,15AZ7.5Y
D493 VHE015Z5R1Y-1 J AD Zener,5.1V,015Z5.1Y
D494 VHE15AZ7R5Y-1 J AC Zener,7.5V,15AZ7.5Y
D495,496 VHEMA8075M/-1 J AC Zener,7.5V,MA8075M
D651 VHDF10J2E//-1 J AC Silicon,F10J2E
D771,772 VHDF10J2E//-1 J AC Silicon,F10J2E
D801 VHDRB521S30-1 J AC Silicon,RB521S30
D821 VHDD1FH3+++-1 J AE Schottky,D1FH3
D822 VHDHRB0103B-1 J AC Silicon,HRB0103B
D831,832 VHDHRB0103B-1 J AC Silicon,HRB0103B
D841 VHDF10J2E//-1 J AC Silicon,F10J2E
D842 VHDHRB0103B-1 J AC Silicon,HRB0103B
D851,852 VHDF10J2E//-1 J AC Silicon,F10J2E
D861,862 VHDF10J2E//-1 J AC Silicon,F10J2E
LEDA02 VHPTLGU1008-1 J AE LED,Yellow-green,TLGU1008
LEDA03 VHPCL190HBX-1 J AR LED,Blue,CL190HBX
LEDA04 VHPTLOU1008-1 J AE LED,Orange,TLOU1008

NO. PARTS CODE

PRICE

RANK

DESCRIPTION

COILS

L100 VPBNN100K0000 J AC 10 µH
L103 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
L456~458 RCILC0353AFZZ J AB Tip Solid Induction,100mA
L491 VRS-TV2AB330J J AA 33 ohms,1/10W
L601,602 RCILC0372AFZZ J AC 22 µH,Choke
L603 RCILC0358AFZZ J AC 4.7 µH,Choke
L604 RCILC0372AFZZ J AC 22 µH,Choke
L608 RCILC0356AFZZ J AC 10 µH
L702,703 RCILC0353AFZZ J AB Tip Solid Induction,100mA
L704 RCILC0352AFZZ J AB Tip Impeder,150mA
L711 RCILC0352AFZZ J AB Tip Impeder,150mA
L712~714 RCILC0353AFZZ J AB Tip Solid Induction,100mA
L821 RCILC0005AWZZ J AF 10 µH,Choke
L841 RCILC0358AFZZ J AC 4.7 µH,Choke
L851 RCILC0005AWZZ J AF 10 µH,Choke

VIBRATORS

XL201 RCRSC0028AFZZ J AH Crystal,33.8688 MHz
XL401 RCRM-0039AWZZ J AF Ceramic,3.68 MHz

CAPACITORS

C100 VCSAPR0JJ106M 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 VCKYCZ1AB104K J AB 0.1 µF,10V
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 VCKYCZ1AB104K J AB 0.1 µF,10V
C113 VCKYCY0JB105K J AC 1 µF,6.3V
C114 VCCCCZ1HH5R0C J AB 5 pF (CH),50V
C121,122 VCKYCZ1HB221K J AB 220 pF,50V
C123,124 VCKYCZ1HB331K J AB 330 pF,50V
C130,131 VCKYCZ1AB104K J AB 0.1 µF,10V
C132,133 VCKYCY1AB224K J AB 0.22 µF,10V
C151 VCKYCZ1CB103K J AB 0.01 µF,16V
C165 VCKYCZ1AB333K J AB 0.033 µF,10V
C171,172 RC-SZ0002AWZZ J AD 33 µF,6.3V,Electrolytic
C200 VCKYCY0JB105K J AC 1 µF,6.3V
C201 VCSAPR0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C202 VCSATK0JJ476M J AD 47 µF,6.3V,Electrolytic,Tantalum
C203 VCKYCZ1AB104K J AB 0.1 µF,10V
C204 VCKYCY1AB474K J AC 0.47 µF,10V
C205 VCKYCZ1AB104K J AB 0.1 µF,10V
C207 VCKYCZ1AB104K J AB 0.1 µF,10V
C209,210 VCKYCZ1AB104K J AB 0.1 µF,10V
C211 VCCCCZ1HH5R0C J AB 5 pF (CH),50V
C212 VCCCCZ1HH8R0D J AB 8 pF (CH),50V
C251,252 VCKYCZ1AB104K J AB 0.1 µF,10V
C253 VCKYCZ1CB103K J AB 0.01 µF,16V
C270 VCKYCY0JB105K J AC 1 µF,6.3V
C272~274 VCKYCZ1AB104K J AB 0.1 µF,10V
C291 VCKYCY0JB105K J AC 1 µF,6.3V
C292 VCKYCZ1CB103K J AB 0.01 µF,16V
C351 VCCCCY1HH470J J AA 47 pF (CH),50V
C353 VCSAPR0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C354 VCKYCZ1AB104K J AB 0.1 µF,10V
C357 VCKYCZ1AB104K J AB 0.1 µF,10V
C361 VCKYTV1HB393K J AB 0.039 µF,50V
C401 VCKYCZ1AB104K J AB 0.1 µF,10V
C431 VCKYCY1AB474K J AC 0.47 µF,10V
C451 VCKYCY1EB223K J AB 0.022 µF,25V
C454 VCKYCZ1HB222K J AB 0.0022 µF,50V
C491 VCKYTV1CB104K J AA 0.1 µF,16V
C492 VCKYCY0JB105K J AC 1 µF,6.3V
C493 VCKYCY1AB474K J AC 0.47 µF,10V
C500 VCSAPR0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C501,502 VCKYCZ1HB222K J AB 0.0022 µF,50V
C503 VCSAPR1AJ335M J AD 3.3 µF,10V,Electrolytic,Tantalum
C505,506 VCKYCZ1HB102K J AB 0.001 µF,50V
C509,510 VCKYCY0JB105K J AC 1 µF,6.3V
C511 VCKYCZ1AB104K J AB 0.1 µF,10V
C600 RC-SZ0001AWZZ J AG 22 µF,6.3V,Electrolytic,Tantalum

– 1 –

MD-MT877/MD-MT877C

NO. PARTS CODE

C601~604 VCKYCY0JB105K J AC 1 µF,6.3V
C605 VCKYCZ1AB104K J AB 0.1 µF,10V
C608 VCKYTV1AB105K J AD 1 µF,10V
C652 VCKYCZ1AB104K J AB 0.1 µF,10V
C701,702 VCSAPR0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C703 VCKYCZ1CB103K J AB 0.01 µF,16V
C711,712 VCCCCZ1HH101J J AB 100 pF (CH),50V
C713,714 VCKYCY0JB105K J AC 1 µF,6.3V
C715 VCKYCZ1AB104K J AB 0.1 µF,10V
C721,722 VCSAPR1AJ335M J AD 3.3 µF,10V,Electrolytic,Tantalum
C723,724 VCKYCZ1HB102K J AB 0.001 µF,50V
C725,726 VCSAPR1AJ335M J AD 3.3 µF,10V,Electrolytic,Tantalum
C731 VCKYCY1AB224K J AB 0.22 µF,10V
C733,734 VCKYCZ1AB104K J AB 0.1 µF,10V
C753,754 VCKYCY0JB105K J AC 1 µF,6.3V
C758 VCKYCY0JB105K J AC 1 µF,6.3V
C760 VCKYCZ1AB104K J AB 0.1 µF,10V
C763,764 VCKYCY0JB105K J AC 1 µF,6.3V
C765,766 VCKYCY1AB224K J AB 0.22 µF,10V
C771 VCSATE0JJ476M J AD 47 µF,6.3V,Electrolytic,Tantalum
C773 VCKYCY1AB224K J AB 0.22 µF,10V
C774~776 VCKYCY0JB105K J AC 1 µF,6.3V
C817 VCKYCZ1AB104K J AB 0.1 µF,10V
C821 VCKYTQ1AB335K J AF 3.3 µF,10V
C822 RC-SZ0001AWZZ J AG 22 µF,6.3V,Electrolytic,Tantalum
C823 VCEAPW0GW227M J AD 220 µF,4.0V,Electrolytic
C825 VCKYCY0JB105K J AC 1 µF,6.3V
C826,827 VCCCCZ1HH820J J AB 82 pF (CH),50V
C828 VCKYCY0JB105K J AC 1 µF,6.3V
C830 VCKYCY0JB105K J AC 1 µF,6.3V
C832,833 VCKYCY1CB104K J AB 0.1 µF,16V
C834 VCKYCZ1AB104K J AB 0.1 µF,10V
C836 VCKYCY1AB474K J AC 0.47 µF,10V
C837 VCKYCY0JB105K J AC 1 µF,6.3V
C838 VCKYCY1CB104K J AB 0.1 µF,16V
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 RC-SZ0002AWZZ J AD 33 µF,6.3V,Electrolytic,Tantalum
C843 VCKYCY1AB224K J AB 0.22 µF,10V
C844 VCSAPR0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C845,846 VCKYCZ1AB104K J AB 0.1 µF,10V
C847,848 VCKYCY0JB105K J AC 1 µF,6.3V
C850 VCKYCZ1AB104K J AB 0.1 µF,10V
C851 VCKYTQ1AB335K J AF 3.3 µF,10V
C852 RC-SZ0001AWZZ J AG 22 µF,6.3V,Electrolytic,Tantalum
C856 VCCCCZ1EH151J J AB 150 pF (CH),25V
C857 VCCCCZ1HH330J J AB 33 pF (CH),50V
C858~860 VCKYCY0JB105K J AC 1 µF,6.3V
C862,863 VCKYCY0JB105K J AC 1 µF,6.3V
C869 VCSATE0JJ476M J AD 47 µF,6.3V,Electrolytic,Tantalum
C876 VCKYCY0JB105K J AC 1 µF,6.3V
C881 VCKYCZ1AB273K J AB 0.027 µF,10V
C901 VCKYCY0JB105K J AC 1 µF,6.3V
C902 VCKYCZ1CB103K J AB 0.01 µF,16V
C905~907 VCKYCZ1HB222K J AB 0.0022 µF,50V
C908 VCKYCY1AB334K J AC 0.33 µF,10V
C909,910 VCKYCZ1AB473K J AB 0.047 µF,10V
C911,912 VCKYCZ1AB104K J AB 0.1 µF,10V
CA01,02 VCKYCY1CB104K J AB 0.1 µF,16V

PRICE
RANK

DESCRIPTION

RESISTORS

R101~104 VRS-CZ1JB223J J AB 22 kohms,1/16W
R111 VRS-CZ1JB123J J AB 12 kohms,1/16W
R112 VRS-CZ1JB224J J AA 220 kohms,1/16W
R131 VRS-CZ1JB154D J AA 150 kohms,1/16W
R132 VRS-CZ1JB105D J AA 1 Mohm,1/16W
R133 VRS-CZ1JB154D J AA 150 kohms,1/16W
R134 VRS-CZ1JB105D J AA 1 Mohm,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-CZ1JB393J J AB 39 kohms,1/16W
R140 VRS-CZ1JB394J J AA 390 kohms,1/16W
R151 VRS-CZ1JB104J J AA 100 kohm,1/16W
R161 VRS-CZ1JB122J J AB 1.2 kohms,1/16W
R200 VRS-CZ1JB104D J AA 100 kohm,1/16W
R204 VRS-CZ1JB102J J AB 1 kohm,1/16W
R205 VRS-CZ1JB273D J AA 27 kohms,1/16W

VRS-CZ1JB000J J AB 0 ohm,Jumper,0.5×1.0mm

NO.

R206 VRS-CZ1JB104D J AA 100 kohm,1/16W
R207 VRS-CZ1JB681J J AB 680 ohms,1/16W
R222 VRS-CZ1JB105J J AB 1 Mohm,1/16W
R251 VRS-CZ1JB220J J AB 22 ohms,1/16W
R252 VRS-CZ1JB564J J AA 560 kohms,1/16W
R253 VRS-CZ1JB333J J AB 33 kohms,1/16W
R254 VRS-CZ1JB105J J AB 1 Mohm,1/16W
R255 VRS-CZ1JB564J J AA 560 kohms,1/16W
R256 VRS-CZ1JB104J J AA 100 kohm,1/16W
R257 VRS-CZ1JB105J J AB 1 Mohm,1/16W
R258 VRS-CZ1JB334J J AA 330 kohms,1/16W
R259 VRS-CZ1JB222J J AB 2.2 kohms,1/16W
R261 VRS-CZ1JB105J J AB 1 Mohm,1/16W
R262 VRS-CZ1JB334J J AA 330 kohms,1/16W
R263 VRS-CZ1JB104J J AA 100 kohm,1/16W
R264 VRS-CZ1JB101J J AB 100 ohm,1/16W
R271,272 VRS-CZ1JB474D J AA 470 kohms,1/16W
R273 VRS-CZ1JB473D J AA 47 kohms,1/16W
R274 VRS-CZ1JB563D J AA 56 kohms,1/16W
R275 VRS-CZ1JB153D J AA 15 kohms,1/16W
R276 VRS-CZ1JB124D J AB 120 kohms,1/16W
R277 VRS-CZ1JB222J J AB 2.2 kohms,1/16W
R278 VRS-CZ1JB220J J AB 22 ohms,1/16W
R281 VRS-CZ1JB102J J AB 1 kohm,1/16W
R282 VRS-CZ1JB473J J AA 47 kohms,1/16W
R291 VRS-CZ1JB222J J AB 2.2 kohms,1/16W
R292 VRS-CZ1JB104J J AA 100 kohm,1/16W
R351 VRS-TV2AB3R9J J AA 3.9 ohms,1/10W
R361 VRS-TQ2BB150J J AA 15 ohms,1/8W
R402 VRS-CZ1JB104D J AA 100 kohm,1/16W
R403 VRS-CZ1JB102J J AB 1 kohm,1/16W
R404 VRS-CZ1JB104J J AA 100 kohm,1/16W
R405 VRS-CZ1JB103J J AA 10 kohm,1/16W
R406 VRS-CZ1JB223J J AB 22 kohms,1/16W
R407,408 VRS-CZ1JB104J J AA 100 kohm,1/16W
R411 VRS-CZ1JB104J J AA 100 kohm,1/16W
R412 VRS-CZ1JB153J J AA 15 kohms,1/16W
R413~416 VRS-CZ1JB102J J AB 1 kohm,1/16W
R422 VRS-CZ1JB104J J AA 100 kohm,1/16W
R423 VRS-CZ1JB223D J AB 22 kohms,1/16W
R424,425 VRS-CZ1JB223J J AB 22 kohms,1/16W
R431 VRS-CZ1JB334J J AA 330 kohms,1/16W
R441 VRS-CZ1JB121J J AB 120 ohms,1/16W
R442 VRS-CZ1JB821J J AA 820 ohms,1/16W
R445 VRS-CZ1JB103J J AA 10 kohm,1/16W
R461 VRS-CZ1JB104J J AA 100 kohm,1/16W
R462 VRS-CZ1JB223J J AB 22 kohms,1/16W
R463 VRS-CZ1JB104J J AA 100 kohm,1/16W
R464 VRS-CZ1JB224J J AA 220 kohms,1/16W
R492 VRS-CZ1JB102J J AB 1 kohm,1/16W
R495 VRS-CZ1JB102J J AB 1 kohm,1/16W
R496 VRS-CZ1JB220J J AB 22 ohms,1/16W
R501,502 VRS-CZ1JB471J J AA 470 ohms,1/16W
R701,702 VRS-CZ1JB101J J AB 100 ohm,1/16W
R703 VRS-CZ1JB104J J AA 100 kohm,1/16W
R710 VRS-CZ1JB470J J AB 47 ohms,1/16W
R711,712 VRS-CZ1JB682J J AB 6.8 kohms,1/16W
R713,714 VRS-CZ1JB103J J AA 10 kohm,1/16W
R715,716 VRS-CZ1JB104J J AA 100 kohm,1/16W
R717,718 VRS-CZ1JB102J J AB 1 kohm,1/16W
R719,720 VRS-CZ1JB682J J AB 6.8 kohms,1/16W
R723,724 VRS-CZ1JB682J J AB 6.8 kohms,1/16W
R725 VRS-CZ1JB101J J AB 100 ohm,1/16W
R726 VRS-CZ1JB393J J AB 39 kohms,1/16W
R727 VRS-CZ1JB822J J AA 8.2 kohms,1/16W
R728 VRS-CZ1JB102J J AB 1 kohm,1/16W
R729,730 VRS-CZ1JB472J J AB 4.7 kohms,1/16W
R731~733 VRS-CZ1JB473J J AA 47 kohms,1/16W
R754 VRS-CZ1JB184J J AB 180 kohms,1/16W
R757 VRS-CZ1JB222J J AB 2.2 kohms,1/16W
R758 VRS-CZ1JB101J J AB 100 ohm,1/16W
R761 VRS-CZ1JB394J J AA 390 kohms,1/16W
R762 VRS-CZ1JB104J J AA 100 kohm,1/16W
R765,766 VRS-CZ1JB150J J AB 15 ohms,1/16W
R801 VRS-CZ1JB473J J AA 47 kohms,1/16W
R802 VRS-CZ1JB104J J AA 100 kohm,1/16W
R803 VRS-CZ1JB102J J AB 1 kohm,1/16W
R804 VRS-CZ1JB334J J AA 330 kohms,1/16W
R805 VRS-CZ1JB105J J AB 1 Mohm,1/16W
R806,807 VRS-CZ1JB104J J AA 100 kohm,1/16W
R808 VRS-CZ1JB564J J AA 560 kohms,1/16W
R809 VRS-CZ1JB473J J AA 47 kohms,1/16W

PRICE

RANK

DESCRIPTIONPARTS CODE

– 2 –

MD-MT877/MD-MT877C

NO.

R810 VRS-CZ1JB223J J AB 22 kohms,1/16W
R812 VRS-CZ1JB104J J AA 100 kohm,1/16W
R813 VRS-CZ1JB222J J AB 2.2 kohms,1/16W
R814 VRS-CZ1JB273J J AA 27 kohms,1/16W
R815~817 VRS-CZ1JB104J J AA 100 kohm,1/16W
R818 VRS-CZ1JB473J J AA 47 kohms,1/16W
R821 VRS-CZ1JB222J J AB 2.2 kohms,1/16W
R822 VRS-CZ1JB104J J AA 100 kohm,1/16W
R823 VRS-CZ1JB274J J AB 270 kohms,1/16W
R824 VRS-CZ1JB103J J AA 10 kohm,1/16W
R825 VRS-CZ1JB394D J AA 390 kohms,1/16W
R826 VRS-CZ1JB395J J AA 3.9 Mohms,1/16W
R827 VRS-CZ1JB274D J AK 270 kohms,1/16W
R828 VRS-CZ1JB222J J AB 2.2 kohms,1/16W
R829 VRS-CZ1JB104J J AA 100 kohm,1/16W
R831,832 VRS-CZ1JB184D J AB 180 kohms,1/16W
R833 VRS-CZ1JB470J J AB 47 ohms,1/16W
R834 VRS-CZ1JB155J J AA 1.5 Mohms,1/16W
R841 VRS-CZ1JB104J J AA 100 kohm,1/16W
R844 VRS-CZ1JB470J J AB 47 ohms,1/16W
R850 VRS-CZ1JB223J J AB 22 kohms,1/16W
R853 VRS-CZ1JB274J J AB 270 kohms,1/16W
R854 VRS-CZ1JB103J J AA 10 kohm,1/16W
R855 VRS-CZ1JB184D J AB 180 kohms,1/16W
R857 VRS-CZ1JB564D J AA 560 kohms,1/16W
R871 VRS-CZ1JB103J J AA 10 kohm,1/16W
R881 VRS-CZ1JB183J J AA 18 kohms,1/16W
R882 VRS-CZ1JB103J J AA 10 kohm,1/16W
R903 VRS-CZ1JB471J J AA 470 ohms,1/16W
R904 VRS-CZ1JB103J J AA 10 kohm,1/16W
R905 VRS-CZ1JB104J J AA 100 kohm,1/16W
R906 VRS-CZ1JB274J J AB 270 kohms,1/16W
R907 VRS-CZ1JB184J J AB 180 kohms,1/16W
R908 VRS-CZ1JB104J J AA 100 kohm,1/16W
R909 VRS-CZ1JB103J J AA 10 kohm,1/16W
R920 VRS-CZ1JB104J J AA 100 kohm,1/16W
RA01 VRS-CY1JB562J J AA 5.6 kohms,1/16W
RA02 VRS-CY1JB822J J AA 8.2 kohms,1/16W
RA03 VRS-CY1JB183J J AA 18 kohms,1/16W
RA04 VRS-CY1JB563J J AA 56 kohms,1/16W
RA05 VRS-CY1JB562J J AA 5.6 kohms,1/16W
RA06 VRS-CY1JB822J J AA 8.2 kohms,1/16W
RA07 VRS-CY1JB183J J AA 18 kohms,1/16W
RA08 VRS-CY1JB563J J AA 56 kohms,1/16W
RA12 VRS-CY1JB333F J AA 33 kohms,1/16W
RA13,14 VRS-CY1JB183F J AA 18 kohms,1/16W
RA15 VRS-CY1JB103J J AA 10 kohm,1/16W
RA16 VRS-CY1JB331J J AA 330 ohms,1/16W

PARTS CODE

PRICE
RANK

DESCRIPTION

OTHER CIRCUITRY PARTS

CN101 QCNCW046XAWZZ J AM Socket,22Pin
CN451 QCNCW862PAFZZ J AG Socket,14Pin
CN601 QCNCW862LAFZZ J AF Socket,11Pin
CNA01 QCNCW047GAWZZ J AF Socket,7Pin

1 F841 QFS-L401AAFNZ J AE

J701 VHLGP1FD202-1 J AT Jack,Optical/Line
J702 QJAKM0018AWZZ J AG Jack,Mic In
J703 QJAKM0015AWZZ J AL Jack,Remote Control/Earphones
M901 RMOTV0031AWZZ J AW Motor [Spindle]
M902 RMOTS0002AWZZ J AT Motor [Sled]
M903 RMOTV0033AWZZ J AW Motor [Lift]
SW401 QSW-M0010AWZZ J AE Switch,Key Type [Eject]
SW901 QSW-M0008AWZZ J AF Switch,Push Type [Disc Protect]
SWA01 QSW-K0237AFZZ J AC Switch,Key Type [Record]
SWA02 QSW-K0237AFZZ J AC Switch,Key Type [Play]
SWA03 QSW-K0237AFZZ J AC Switch,Key Type [Bass]
SWA04 QSW-K0237AFZZ J AC Switch,Key Type [Edit]
SWA05 QSW-K0237AFZZ J AC Switch,Key Type [Display]
SWA06 QSW-K0237AFZZ J AC Switch,Key Type [Volume -]
SWA07 QSW-K0237AFZZ J AC Switch,Key Type [Volume +]
SWA08 QSW-K0237AFZZ J AC Switch,Key Type [Stop]
SWA09 QSW-K0237AFZZ J AC Switch,Key Type [Mode]
SWA10 QSW-K0237AFZZ J AC Switch,Key Type [Fast Reverse]
SWA11 QSW-K0237AFZZ J AC Switch,Key Type [Fast Forward]
SWA12 QSW-K0237AFZZ J AC Switch,Key Type [Enter]
SWA13 QSW-M0009AWZZ J AE Switch,Push Type [Open/Close]

Square Tip Type Fuse,0.4A,DC60V

MD MECHANISM PARTS

1 NGERH0125AWZZ J AB Wheel,Drive
2 NSFTD0007AWZZ J AL Screw,Drive

NO. PARTS CODE

3 RCILH0003AWM1 J AT Magnetic Head Ass’y

1 4 RCTRH8210AFZZ J BM Optical Pickup

5 QPWBH0010AWZZ J AH Mechanism Flexible PWB
6 LHLDX3008AWM2 J AM Cartridge Holder Ass’y
7 MLEVF0058AWFW J AD Lift Lever
9 MSPRT0041AWFJ J AB Spring,Eject Lever
10 LANGK0211AWZZ J AC Bracket,Cancel
11 LCHSM0107AWM1 J AL Main Chassis Ass’y
12 MSPRP0044AWFJ J AB Spring,Thrust Plate
13 MLEVF0056AWFW J AC Lift Connection Lever
14 MLEVF0057AWFW J AC Lift Working Lever
15 NGERH0096AWZZ J AC Gear,Drive
16 MSPRP0043AWFJ J AB Spring,Grip
17 NBRGC0004AWZZ J AB Metal
501 LX-BZ0049AWZZ J AB Screw,ø1.4×1.8mm
502 LX-BZ0050AWZZ J AB Screw,ø1.4×2.5mm
503 LX-BZ0051AWZZ J AB Screw,ø1.4×3.8mm
504 LX-BZ0823AFZZ J AA Screw,ø1.4×1.2mm
505 LX-JZ0027AWZZ J AA Screw,ø1.7×3.5mm
506 LX-JZ0167AFZZ J AB Screw,ø1.4×3.0mm
507 LX-WZ9290AFZZ J AA Washer,ø0.8×ø2.4×0.25mm
508 LX-WZ9296AFZZ J AA Washer,ø1.5×ø3.5×0.25mm
M901 RMOTV0031AWZZ J AW Motor [Spindle]
M902 RMOTS0002AWZZ J AT Motor [Sled]
M903 RMOTV0033AWZZ J AW Motor [Lift]

PRICE

RANK

DESCRIPTION

CABINET PARTS

201 GCABA3008AWM1 J BA Top Cabinet Ass’y
202 GCABB3010AWM1 J AU Bottom Cabinet Ass’y

202 GCABB3013AWM1 J Bottom Cabinet Ass’y
203 GCABA1213AWSA J AM Center Cabinet

204 GFTAB1029AWSA J AE Cover,Battery
205 HDECQ0649AWSA J AL Decoration Plate
207 PSHEZ0095AWZZ J AE Sheet,Button
208 GMADI0007AWSA J AC LED Window A
209 GMADI0008AWSA J AC LED Window B
210 GMADI0009AWSA J AC LED Window C
212 LANGT0072AWFW J AB Bracket,Center Cabinet
213 JKNBZ0757AWSA J AQ Button,Operation A
214 JKNBZ0758AWSA J AK Button,Operation B
215 HDECQ0650AWSA J AF Decoration Plate
216 LHLDZ1291AWZZ J AF Holder,LCD
217 RUNTZ0025AWZZ J BB LCD Ass’y
218 JKNBK0081AWSA J AE Knob,Eject
219 LHLDZ3017AWM2 J AQ Main Frame Ass’y
220 LANGZ0031AWM2 J AG Battery Terminal,+
221 LHLDZ1282AWZZ J AF Holder,Battery
223 GCOVH1021AWZZ J AB Cover,Extension Terminal B
224 GCOVH1020AWZZ J AB Cover,Extension Terminal A
225 QTANB9028AWFQ J AC Extension Terminal,A
226 QTANB9032AWFQ J AG Battery Terminal,­227 PSHEZ0085AWZZ J AC Sheet,Insulation
228 LANGT0080AWFW J AC Bracket,Lock
229 GCOVH1023AWSA J AB Cover,Charging Stand
230 PSHEZ0098AWZZ J AB Sheet,Flexible PWB Protection
231 PSHET0046AWZZ J AD Sheet,PWB
232 PSPAZ0031AWZZ J AB Spacer,PWB B
233 PCUSG0068AWZZ J AB Cushion,Terminal
234 QTANB9029AWFQ J AC Charging Stand Terminal
235 PSHEZ0105AWZZ J A A Sheet,Main Frame
236 PSPAZ0028AWZZ J AA Spacer,PWB A
237 PSPAZ0027AWZZ J AB Spacer,Main Frame
238 PSHET0052AWZZ J AC Sheet,Button Guide
239 PSHET0053AWZZ J AA Sheet,Button
240 PSHET0059AWZZ J A A Sheet,Open/Close Button
241 PCUSG0078AWZZ J Cushion,Bracket
242 PSHET0060AWZZ J Sheet,Button
601 LX-BZ0047AWFC J AB Screw,ø1.4×1.5mm
602 LX-BZ0048AWFN J AC Screw,ø1.4×2.5mm
603 LX-BZ1008AFFC J AB Screw,ø1.4×2mm
604 LX-BZ0800AFZZ J AA Screw,ø1.4×2.5mm

[MD-MT877 (S)]
[MD-MT877C (S)]

PACKING PARTS
(MD-MT877 (S) Except for U.S.A./MD-MT877C (S) for
Canada)

SPAKA0284AWZZ J AE Packing Add.
SPAKC1155AWZZ J Packing Case [MD-MT877 (S)]
SPAKC1229AWZZ J Packing Case [MD-MT877C (S)]

– 3 –

MD-MT877/MD-MT877C

NO. PARTS CODE

SPAKZ0630AWZZ J Pad,AC Adaptor
SPAKZ0692AWZZ J AB Sheet,Bubble
SSAKA0009AWZZ J AA

PRICE
RANK

DESCRIPTION

Polyethylene Bag,Battery Charger

ACCESSORIES

GCASZ0002AWSA J AL Battery Case
QCNWG0029AWZZ J Connecting Cord,RCA Type

QCNWG0382AFZZ J AK Connecting Cord,RCA Type
QCNWG0422AFZZ J AQ Connecting Cord,Optical Type

1 RADPA3048AWZZ J AW AC Adaptor

RPHOH0176AFSA J AT Earphones
RRMCW0011AWSA J BK Remote Control

RRMCW0012AWSA J Remote Control
RUNTZ0032AWM1 J BL Battery Charger

TINSK0115AWZZ J AH Operation Manual
TINSZ0639AWZZ J AE

TINSZ0640AWZZ J AC Quick Guide [MD-MT877 (S)]
TLABZ0695AWZZ J AA Label,Caution (Battery Case)
UBAGC0005AWZZ J AD Battery Carrying Case
UBAGC0006AWSA J AH Carrying Case
UBATM0006AWSA J AY Battery

(From Serial No.105ЧЧЧЧЧ)
(To Serial No.104ЧЧЧЧЧ)

(To Serial No.102ЧЧЧЧЧ)
(From Serial No.103ЧЧЧЧЧ)

[MD-MT877C (S)]

Operation Manual [MD-MT877 (S)]

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

PWB-A 92LPWB3664MDSS J — Main
PWB-B 92LPWB3532KEYS J — LCD/Key

OTHER SERVICE PARTS

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

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

(TEAC Test MD)
(TEAC Test MD)

BATTEY CHARGER PARTS

22 RUNTZ0032AWM1 J BL Battery Charger
22- 1 GCABA1223AW01 J Front Cabinet
22- 2 ———— — Back Cabinet Unit

22- 3 LHLDZ1283AWSA J AE Remote Control Stand
22- 4 LHLDZ1285AWSA J AF Stand
22- 5 GLEGG0002AWZZ J AB Cushion A
22- 6 GLEGG0003AWZZ J AB Cushion B
22- 7 XEBSN20P05000 J AA Screw,ø2×5mm
22- 8 TLABM0107AWZZ J Label,Specifications
22- 9 TLABZ0855AWZZ J Label,Caution

(Not Replacement Unit)

NO.

PRICE

RANK

DESCRIPTIONPARTS CODE

– 4 –

MD-MT877/MD-MT877C

501x2

A

16

501

506x3

504x2

M901

502

B

3

10

505

M902

503

12

C

4

2

507

M903

15

17

1

D

E

6

14

11

508

13

F

G

9

7

5

H

1

23456

Figure 5 MD MECHANISM EXPLODED VIEW

– 5 –

MD-MT877/MD-MT877C

MD MECHANISM

A

205

603x2

B

201

OPENOPEN

218

203

236

603x2

C

237

235

207

219

220

204

221

210

OPENOPEN

209

208

D

241

212

212x3

601

223x2

212

E

F

G

H

LCD PWB

231

604x4

215

214

238

242

216

217

239x3

603

213

230

240

603

236

229

228

603

MAIN PWB

226

232

602

233

227

601

224x2

601

225x4

234

603x2

202

603

1

23456

Figure 6 CABINET EXPLODED VIEW

– 6 –

MD-MT877/MD-MT877C

A

B

22-1

22-6

22-7

22-7

C

22-3

22-4

D

E

22

22-8

22-5x2

22-2

F

22-5x2

G

22-9

H

1

23456

Figure 7 BATTERY CHARGER EXPLODED VIEW

– 7 –

PACKING OF THE SET (MD-MT877(S) FOR U.S.A. ONLY)

Setting position of switches and knobs

Remote Control HOLD CANCEL

MD-MT877/MD-MT877C

Operation Manual

Connecting Cord,
Optical Type

Quick Guide

AC Adaptor

AC Adaptor Pad
SPAKZ0630AWZZ

Carrying Case

Sheet, Bubble
SPAKZ0692AWZZ

Battery Case

Packing Add.
SPAKA0284AWZZ

Earphones

Battery

Connecting Cord,
RCA Type

Battey Charger

Label, Caution

Remote
Control

Battery
Carrying
Case

Polyethylene Bag, Battey Charger
SSAKA0009AWZZ

Packing Case
SPAKC1155AWZZ

:Not Replacement Item

– 8 –

MD-MT877/MD-MT877C

— M E M O —

– 9 –

— M E M O —

MD-MT877/MD-MT877C

– 10 –

MD-MT877/MD-MT877C

COPYRIGHT 2001 BY SHARP CORPORATION

©

ALL RIGHTS RESERVED.

No part of this publication may be reproduced,
stored in a retrieval system, or transmitted in
any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without
prior written permission of the publisher.

SHARP CORPORATION
Communication Systems Group
Quality & Reliability Control Center
Higashihiroshima, Hiroshima 739-0192, Japan

Printed in Japan

A0103-1267DS•HA•M
SC • LAG • SL