Sharp MD-MT877CS Service Manual

MD-MT877/MD-MT877C

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)

SERVICE MANUAL

SHARP CORPORATION

No. S3118MDMT877/

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

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.

PORTABLE MINIDISC RECORDER

– 2 –

MD-MT877/MD-MT877C

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

Specifications for this model are subject to change without prior
notice

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

● 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”.

● Operable duration with a commercially available battery varies depend-

ing 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).

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)

Stereo 2 times long 4 times long

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

– 3 –

MD-MT877/MD-MT877C

NAMES OF P ARTS

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

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

Main unit display panel

3-color LED

Various modes are indicated with three colors of lights.

Charging Light

ing starting with yellow-green light.

Refresh Extinguishing starting with orange light

after all the lights are lit.

Playback Flashing the color of the activated play-

back mode.

Recording Flashing the color of the activated re-

cording mode.

Fast Forward

Flashing starting with yellow-green light.

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

ange light after all the lights are lit.

TOC Reading: flashing at random.

13

14

15

12

2

1

3

4

5

6

7

8

9

10

11

1
2
3
4
5
6

7
8
9
10
11
12

Blue

Yellow-

green

Orange

– 4 –

MD-MT877/MD-MT877C

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

Remote control display panel

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

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

Battery charger

1

8

6

7

9

2345

123

4

56

7

8

9

10

1

4
5
6

3

2

CHARGE

OPERATION

– 5 –

MD-MT877/MD-MT877C

OPERATION MANUAL

Using with the Rechargeable Battery

Charging

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.

●

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.

AC 120V
60Hz

Charge
mode

Do not force the
battery cover
open too far.

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.

To the DC IN
5V jack

Checking the remaining amount of
battery level

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

● 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

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

Notes:

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

way, “

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

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.

Checking Displays

When the battery
level is high

When the battery
low is very low

How to read the battery indicator

– 6 –

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)

MEANING

● 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.

REMEDY

● 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.

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

– 7 –

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.

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?

●

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”?

The MiniDisc can­not be ejected.

Recording and
editing are im­possible.

The battery cannot
be charged.

Nothing appears
on the remote
control display.

PROBLEM CAUSE

PROBLEM CAUSE

– 8 –

MD-MT877/MD-MT877C

33

1

222

44

1

Insert a MiniDisc

Inserte un minidisco

1

Slide the OPEN lever to re­lease the compartment door.

Deslice la palanca OPEN para
abrir la puerta del comparti­miento.

2

Lift it up.

Levantelo.

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".

Insert according to the direction of the arrow.

Insértelo de acuerdo con la dirección de la flecha.

Recordable

Para poder
grabar

Recording
prevented

Para no poder
grabar

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".

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.

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.

2

Connect the AC adaptor

Conecte el adaptador de CA

RELEASE

LOCK

To the DC IN 5V jack

A la toma DC IN 5V

AC 120V, 60 Hz

120V CA, 60Hz

Insert securely, all the way in.

Insértelo con seguridad a fondo.

To an AC outlet

A un tomacorriente
de CA

LINE OUT

LEFTRIGHT

OPTICAL/

LINE IN

White: To Left
Blanco: A la

izquierda

Red: To Right
Rojo: A la

derecha

3

Connection

Conexión

To a stereo system with

“LINE OUT” or “AUDIO OUT”

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.

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.

– 9 –

MD-MT877/MD-MT877C

Recording

Grabación

Check that the unit is connected to the stereo system.

Compruebe que el aparato esté conectado al sistema estéreo.

1

Press the REC button.

Pulse el botón REC.

2

Begin playback on the stereo system connected to this unit.

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

3

Press the or button

to adjust the recording level.

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

Pulse el botón 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.

0dB
4dB

Level meter indicator

Indicador del medidor de nivel

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.

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.

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.

TOC display

Visualización
TOC

Playing

Reproducción

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.

– 10 –

MD-MT877/MD-MT877C

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

2 Top Cabinet 1. Open the Top cabinet.

10-1

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

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

3 Main PWB 1. Open the rechargeable

10-2
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

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

2.

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

(E2) x4

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.

REMOVAL

PROCEDURE

STEP

FIGURE

Figure 10-1

Figure 10-2

Figure 10-4

Caution:

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 10-3

OPENOPEN

OPEN

Top Cabinet

Bottom Cabinet

EJECT
Knob

(B1) x 2
ø 1.4 x 2 mm

(B1) x 2
ø 1.4 x 2 mm

(A1) x 1
ø 1.4 x 2 mm

(A1) x 1
ø 1.4 x 2 mm

(A1) x 1
ø 1.4 x 2 mm

(A1) x 2
ø 1.4 x 2 mm

OPEN

(C1) x 1
ø 1.4 x 2.5 mm

(C2) x 1(1*)

(C2) x 1

(B2) x 1

pull

pull

Battery
Cover

Main Frame

Main PWB

1

2

OPEN

A

Main Frame

MD Mechanism

OPEN

(D1) x 1
ø 1.4 x 1.5 mm

(E1) x 6
ø 1.4 x 2 mm

(E2) x 4

LCD PWB

Top Cabinet

– 11 –

MD-MT877/MD-MT877C

REMOVING AND REINSTALLING THE MAIN PARTS

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

Figure 11-1

Figure 11-2

Figure 11-3

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.

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.

Figure 11-4

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 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.

(A2) x 3
ø 1.4 x 3 mm

MD Mechanism

Spindle Motor

Solder joints
(A1) x 4

MD Mechanism

(B2) x 1
ø 1.4 x 3.8 mm

Solder Joints
(B1) x 2

Lift Motor

(C1) x 1

(C2) x 1

(C3) x 2

ø 1.4 x 1.2 mm
Sled
Motor

(C4) x 3
Solder
Joints

MD Mechanism

(E1) x 1
ø 1.4 x 1.8 mm

(D2)x2
Solder Joints

MD Mechanism

(E2) x 1

ø 1.7 x 3.5 mm

Grip Spring

(D1) x 2
ø1.4 x 1.8 mm

Optical Pickup

Drive
Screw

Thrust
Spring

Magnetic
head

MD-MT877/MD-MT877C

– 12 –

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 _ ]

1 High reflection disc

MMD-110

88GMMD-110

(TEAC Test MD)

2 Low reflection disc

MMD-213A

88GMMD-213A

(TEAC Test MD)

3 Low reflection disc

Recording

UDSKM0001AFZZ

minidisc disc

ADJUSTMENT

Test disc

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

Type

Test disc Parts No.

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

recorded.

1. AUTO 1 Mode • Perform preliminary automatic adjustment.

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

AUTO1.

2. AUTO 2 Mode

• Perform ATT (attenuator) automatic adjustment.

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

3. TEST-PLAY Mode

• 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.

4. TEST-REC Mode

• 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.

5. MANUAL 1 Mode

• Temperature is displayed.

• Seeing the displayed adjustment value, perform

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

6. MANUAL 2 Mode

• Temperature is displayed.

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

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

7. ERROR INFORMATION

• Error information is displayed.

Mode • Error information is initialized

8. NORMAL Mode

• 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.

9. EEPROM Mode

• 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.

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

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].

Test Mode

MD-MT877/MD-MT877C

– 13 –

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".

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)

MD-MT877/MD-MT877C

– 14 –

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.

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

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

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

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

• Recording is also possible.

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

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

MD-MT877/MD-MT877C

– 15 –

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 ]

Ambient

temperature

Temperature

correction

+ 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

Center

temperature

Ambient

temperature

Temperature

correction

Center

temperature

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

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

(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 .

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)

(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

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

MD-MT877/MD-MT877C

– 16 –

EEPROM DATA LIST (EEPROM version C)

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

Item display

Set values

Fucus setting

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

Item display

Set values

Tracking setting

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 _ EBH
MPG _ 28H
SPL _ 60H
SPW _ 0FH
SPB _ 66H
SRi _ C0H
SRm _ 9AH
SRo _ 7BH

Item display

Set values

Spindle setting

SKS _ 7FH
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

Item display

Set values

Sled setting

MD-MT877/MD-MT877C

– 17 –

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

Item display

Set values

BASS setting

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

Item display

Set values

ADJ.SET setting

Digital EQ setting

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

Item display

Set values

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 _ 00 H
DRH _ 64H
PLE _ A6H
RCE _ 94H
ELT _ A0H
X2T _ C0H
SDF _ 1FH
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

Item display

Set values

Control setting

MD-MT877/MD-MT877C

– 18 –

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

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

Volume+

Volume -

: Version indication 2 seconds

EEPROM version

Test Mode Start · Completion methool

All the lighting

T E S T

• 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.

: LCD all the lighting two seconds

Destination

Program version

• How to cancel the test mode

T E S T

B Y E
B Y E O K

POWER OFF

: Test mode stop

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

Pickup position initialisation
EEPROM contents renewal

STOP

Indication after the start :

(During the spare style automatic adjustment)

(During the focus balance adjustment)

(During the adjustment that ATT is automatic)

Normality completion

(Adjustment completion)

(Continuance is regenerating)
It confirms that an address proceeds

PLAY

PLAY

A U T O 1

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

A D J . O K

A T 2

A T 1

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

The indication of RAMDOM

A P # # # #

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

B Y E O K

PLAY

STOP is pushed

Remote controller P-MODE button

A D J . O K

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

The indication of "TEST"

A D J . O K

AUTO2 It is made to carry it out

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

PLAY

STOP is pushed

Normality completion

(In such cases as the battery)

MD-MT877/MD-MT877C

– 19 –

: Test mode stop

: Pre-automatic adjustment menu

: ATT auto adjustment menu

: EEPROM setting menu

BASS

T E S T

Slide external

periphery move

Slide internal

periphery move

Change of Tset Mode Menus

A U T O 1

A U T O 2

SKIP UP SKIP DOWN

SKIP DOWN

SKIP UP SKIP DOWN

SKIP UP SKIP DOWN

SKIP UP SKIP DOWN

SKIP UP SKIP DOWN

T R E C

T P L A Y

SKIP UP SKIP DOWN

SKIP UP SKIP DOWN

: Error history display menu

E E P R O M

SKIP UP SKIP DOWN

SKIP UP

SKIP DOWN

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.

: Pre-manual adjustment menu

: ATT manual adjustment menu

: Continuous playback menu

M A N U 1

: Continuous record menu

M A N U 2

: Test mode normal play menu

E D A T A

N O R M A L

: Digital input signal monitor menu

SKIP UP SKIP DOWN

SKIP UP SKIP DOWN

: Pre-adjustment value check menu

D i n M o n

SKIP UP SKIP DOWN

: ATT adjustment value check menu

R S L T 1

R S L T 2

: Preautomatic adjustment menu
Adjustment error

: Preadjustment error (adjustment value output)

: During preautomatic adjustment

Adjustment error

Normal end

: Preadjustment normal end (adjustment value output)

: During ATT automatic adjustment

PLAY

PLAY

A U T O 1

Servo Preautomatic Adjustment

A D J . O K

A D J . N G

A T 2

A T 1

* 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).

MD-MT877/MD-MT877C

– 20 –

: ATT auto adjustment menu

: ATT adjustment error (adjustment value output)

: During ATT auto adjustment

Adjustment error

Normal end

: ATT adjustment error (adjustment value output)

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

PLAY

PLAY

A U T O 2

Servo ATT Auto Adjustment

A D J . O K

A D J . N G

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

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
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)

: Continuous playback menu

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

# # # # : Address

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

# # # # : Address

Continuous Playback

* 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

H

0 7 0 0

H

0 8 A 0

H

A d 0 0 3 2

A d 0 3 C 0

DISP

DISP

A d 0 7 0 0

DISP

DISP

A d 0 8 A 0

* 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

A d 0 0 5 0

MODE

MODE

A d 0 0 5 0

MODE

• Continuous playback from current pickup position

: Continuous playback menu

: Start address setting

DISP

T P L A Y

A d 0 0 3 2

PLAY

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

• Continuous playback from any address

* 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.

A d 0 9 5 0

PLAY

T P L A Y

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

AUTO1 Practice finish?

AUTO2 Practice finish?

YES

YES

E r A D J

AUTO2 Practice

No error?

A D J. N G

NO

NO

YES

NO

0 9 5 0

H

P-MODE

H B
L B

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

: 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

MD-MT877/MD-MT877C

– 21 –

: Continuous record menu

Continuous Record

* 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.

• Continuous record from the current pickup position

: Continuous record menu

: Start address setting

: Continuous record

# # # #: Address

: Continuous record

# # # #: Address

DISP

T R E C

A d 0 0 3 2

PLAY

A P # # # #

• Continuous record playback from any address

A d 0 0 3 2

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 3 C 0

DISP

A d 0 7 0 0

DISP DISP

DISP

A d 0 8 A 0

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

* 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)

A d 0 0 5 0

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

A d 0 0 5 0

MODE

A d 0 0 5 0

MODE

MODE

A d 0 9 5 0

0 9 5 0 H

PLAY

T R E C

A P # # # #

AUTO1 Practice finish?

AUTO2 Practice finish?

YES

YES

E r A D J

AUTO2 Practice

No error?

A D J. N G

NO

NO

YES

NO

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.)

* 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

1 0 T R

BASS

BASS

1 0 0 s t p

BASS

* 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

100step

DISP

T-PLAY Each indication

b # # #

PLAY

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.

: Continuous playback menu

: Focus balance Adjustment mode

: Focus balance

# # # : Jitter error

MD-MT877/MD-MT877C

– 22 –

: Pre-Manual Adjustment menu

: Temperature code indication

$ $ : Temperature code

: A signal offset (AINO) measurement

: Measurement value

: B signal offset (BINO) measurement

: Measurement value

: E signal offset (EINO) measurement

: Measurement value

: F signal offset (FINO) measurement

: Measurement value

: Laser ON (play power)

: AB signal level measurement (ABMAXO)

: Measurement value

: A-ATT (focus) tentative setting

: ATT setting

: B-ATT (focus) tentative setting

: ATT setting

: Pit section adjustment COUT level setting

: COUT level setting

: Groove section adjustment COUT level setting

: COUT level setting

: E-ATT (tracking) initial setting

: ATT setting

: F-ATT (tracking) initial setting

: ATT setting

PLAY

M A N U 1

Servo Pre-Manual Adjustment

T M P $ $
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

SKIP UP SKIP DOWN

: Pit section EF signal level measurement (LPFEFO)

: Measurement value

: Groove section EF signal level measurement (LPFEFO)

: Measurement value

: TCRS signal level measurement (TCRSMIO)

: Measurement value

: A-ATT (focus) initial setting

: ATT setting

: B-ATT (focus) initial setting

: ATT setting

: TCRS signal offset (TCRSO) measurement

: Measurement value

a b
S A

SKIP UP SKIP DOWN

S B

SKIP UP SKIP DOWN

T H

SKIP UP SKIP DOWN

: AB input level measurement (LPFABO)

: Measurement value

* 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.

P-MODE

P-MODE

P-MODE

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

1 (initial value) 10 384

BASS

BASS

BASS

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

L O N P

L O N R

L O N M

Play back Record power Maximum power

P-MODE

P-MODE

MD-MT877/MD-MT877C

– 23 –

S F

f i

E F

DISP

DISP

S E
e i

E F

DISP

DISP

DISP

DISP

• LPFFINO/EFMIO measurement value

• LPFEINO/EFMIO measurement value

G C H

e f

DISP DISP

P C H

S B
a b

DISP DISP

S A

• LPFEFO measurement value

• LPFABO measurement value

S b
A B

DISP DISP

S a

• ABMAXO measurement value

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

: LPFFINO measurement value indication
"1" Mark lighting

: F-ATT (tracking) initial setting

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

: LPFEINO measurement value indication
"1" Mark lighting

: E-ATT (tracking) initial setting

: LPFEFO measurement value indication
"1" Mark lighting

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

: LPFABO measurement value indication
"1" Mark lighting

: ABMAXO measurement value indication
"1" Mark lighting

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

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

: ATT manual adjustment menu

: Temperature code indication

$ $ : Temperature code

: Laser ON (play power)

: Pit section E-ATT (tracking) setting

: ATT setting

: Pit section F-ATT (tracking) setting

: ATT setting

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

: ATT setting

: TCRS ATT setting

: ATT setting

:Groove section E-ATT (tracking) setting

: ATT setting

:Groove section F-ATT (tracking) setting

: ATT setting

: Low reflection A-ATT (focus) setting

: ATT setting

: Low reflection B-ATT (focus) setting

: ATT setting

PLAY

M A N U 2

Servo ATT Manual Adjustment

T M P $ $
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

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

: ATT setting

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

SKIP UP SKIP DOWN

* 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.

MD-MT877/MD-MT877C

– 24 –

gj

L b

S Q # # # #

PLAY P-MODE

H B

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

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

: ATT setting

L B

A P # # # #

P F

f i

E F

DISP

DISP

P E

e i

E F

DISP

DISP

DISP

DISP

• LPFFINO/EFMIO measurement value

• LPFEINO/EFMIO measurement value

T C

DISP DISP

G C

H B

a b

DISP DISP

H A

• TCRSMIO measurement value

• LPFABO measurement value

* 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.

P-MODE

P-MODE

* 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

BASS

BASS

L O N P

L O N R

L O N M

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

: LPFFINO measurement value indication
"1" Mark lighting

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

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

: LPFEINO measurement value indication
"1" Mark lighting

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

: TCRSMIO measurement value indication
"1" Mark lighting

: TCRS ATT setting

: LPFABO measurement value indication
"1" Mark lighting

: 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

L b

L a

L B

L A

G E

G F

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

MODE

MD-MT877/MD-MT877C

– 25 –

: 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

PLAY

R S L T 1

Servo Pre-adjustment Value Check

A H
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

SKIP UP SKIP DOWN

* 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.

P-MODE

: B-ATT (focus) initial setting

: E-ATT (tracking) initial setting

: F-ATT (tracking) initial setting

S B

S E

SKIP UP SKIP DOWN

S F

SKIP UP SKIP DOWN

P-MODE

P-MODE

P-MODE

P-MODE

MD-MT877/MD-MT877C

– 26 –

: 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

PLAY

R S L T 2

ATT Setting Check

P E
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

SKIP UP SKIP DOWN

* 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

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

P-MODE

P-MODE

: 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

PLAY

E D A T A

Error History Display

E 0 $ $

E 1 $ $

: Error history indication menu

: Error history clear

DISP

E D A T A

C L E A R

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

• Error history clear

• Error history indication

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

: Total recording time

R C

SKIP UP SKIP DOWN

After one second

MD-MT877/MD-MT877C

– 27 –

: EEPROM setting menu

: Focus setting menu

: Spin setting menu

: Tracking setting menu

: Sled setting menu

: BASS setting menu

: TEMP setting menu

: Adjustment setting menu

: Digital EQ setting menu

: Control setting menu

PLAY

E E P R O M

EEPROM Setting

F o c u s

S p i n

SKIP UP SKIP DOWN

T r a c k

SKIP UP SKIP DOWN

S l e d

SKIP UP SKIP DOWN

B a s s

SKIP UP SKIP DOWN

T e m p

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 DOWN

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

• Menu transition

L S I I F

SKIP UP SKIP DOWN

SKIP UP

: Temp setting menu

: TEMP standard value setup

: Setup value

$ $ : Temperature code

: TEMP A/D input value indication

PLAY

T e m p

• TEMP Setting

T M $ $

T P i n

SKIP UP SKIP DOWN

* 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

* 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

P-MODE

P-MODE

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

P-MODE

P-MODE

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

: Each setup menu except for TEMP

: Each setup item except for TEMP

: Setup value

PLAY

Each setup menu

• Setup except for TEMP

Setup item

: LSI setting TEST mode menu

: Test mode normal playback menu

: Normal playback mode

@@@@@@: Mode and address indication

PLAY

N O R M A L

Test Mode Normal Playback

@@@@@@

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

– 28 –

MD-MT877/MD-MT877C

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

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.

POSITION

REF. NO

DESCRIPTION

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

TOP

VIEW

F10J2E

TOP VIEW

B

(G)

(3)

E

(S)

1

C

(D)

(2)

SBE803

TOP VIEW

1SS361

TOP VIEW

HN1C01 FU

1
2
3

6

7

8

4

5

FTD2017

TOP VIEW

1
2
3

4

5

6

FDN339 N

HRB0103B
1SS372

TOP VIEW

1

2

3

4

5

6

1

2

3

FDG312 P

RN4904
RN4911

TOP VIEW

1
2
3

4

5

6

TYPES OF TRANSISTOR AND DIODE

– 29 –

MD-MT877/MD-MT877C

Figure 29 BLOCK DIAGRAM

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

– 30 –

MD-MT877/MD-MT877C

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

A

B

C

D

E

F

G

H

1

23456

Figure 30 SCHEMATIC DIAGRAM (1/2)

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

+2.5V

+1.5V

+2.7V

MAIN PWB-A

11

1

PLAYBACK SIGNAL
RECORD SIGNAL

OPTICAL PICKUP

MECHANISM FLEXIBLE

51

50

49

64

63

62

19
18
17

32
31
30

1

11

10

4
3

15

14

2

9

12

13

L103

11 10

987654321

W
V

U

–

V

U

W

COM

+

M901
SPINDLE
MOTOR

M903
LIFT
MOTOR

M902

SLED

MOTOR

M

M

M

TP487

TP487A

TP105A

LDVAR

LDON

OPICGA

1 2 3 4 5 6 7 8 9

TP113

TP107

TP116

TP117

TP118

TP111

TP114

TP110

TP108

TP103

TP102

TP106

TP101

TP105

TP109

TP115

TP119

TP120

TP121

TP122

T–

F+

T+

F–

RF1

RF3

RF4

RF2

F+

T–

F–

T+

AGND

MP/R

VCC

CVCC

COM

VCC

DGND

DGND

LDVAR

LDON

F

E

10 11 12 13 14 15 16 17 18 19

OPIC

TP352

14

13

12

11

10

9

8

7
6
5
4
3
2
1

VCC

GND

TP351

8

7

6

5

4 3 2 1

3
2
1 5

4

5

4 3

2 1

TP656

TP658

TP657

TP655

TP654

TP660

TP659

TP661

TP651

TP653

TP652

HEAD

DCNT1

TRDRR

TRDRF

FODRR

FODRF

X176K

SPDRF

3

2

1

N.C.

SPVM1

SPPG1

SPVM2

SPWOUT

SPVOUT

SPUOUT

SPPG2

IN2R

IN1F

STALL

STHB

PWVM

PWOUT

PWPG

H1PG

N.C.

EXTCLK

C1P

C1M

C2P

H2ROUT
H2VM
H2FOUT
H2PG

H1ROUT
H1VM

H1FOUT

H1PG1

H2PG2

VCC2

VCC1

SLVM1

SLUOUT

SLPG1

SLVOUT

SLVM2

SLPG2

SLCOM

BEMFW

BEMFV

BEMFU

SLWOUT

RIB

SPCOM

SPWIN

S2
S1

ASGND

CST

CSL1

CSL2

FG

BRK–
BRK+

IN1R

IN2F

C2M

VG

S3

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

32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17

SPVIN

SGND

PWIN1

SPUIN

16

15

14

13

12

11

10

9

8

7

6

5

4 3 2 1

64

63

62

61

60

59

58

57

56

55

54

53

52

51

50

49

8

7

6

5

4
3
2
1

G

G

I1

VCC

I2

O1

O2

ESW

BOUT

FSW

TCGO

AOUT

BOUT

EOUT

DTEMP

RFADD

TCGI

EIN

FIN

FOUT

EOUT

48 47 46 45 44 43 42

10

ASW

BSW

GND1

NIN

PITG

3+4

PIN

1+2

1234

R

and
SW

DIFF

BIAS

RF1
RF2
RF3
RF4
REFI

REFO

AIN
BIN

AOUT

12

11

9

8

7

6

5

4

3

2

1

41 40 39 38 37

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

EFMAGC

ADAGI

2-1

DCNF

VCC1

BIAS

ADIP

ADIPO

EFMO

AGC

MODE

SW

OPICPW

VCC2

WBO

GND2

BPF

CK102

35

36

34
33
32
31
30
29
28
27
26
25

DISC
SGAIN
TEMP

ADIPNF

ADAGC

TP901

TP610

DISCPR

SLCNT3
SLCNT2
SLCNT1

SPDRR

SPIN

LDCNT2

LDCNT1

EFMO

HDON

TP100

TP211

TP209

TP210

FOK
SENSE
CIN

SYD1

DINT

SYD0

SYD3

SYD2

SYD5

SYD4

SYD7
SYWR
SYRD

SYD6

SYRS

XRT

TP201A

TP201

X176KO

TRDRR

TRDRF

FODRF

FODRR

SPDRF

SPDRR

6
5
43

2

1

VCC2R5V

VCCDRAM

TP200

CK224
TP203
CK222

TP205

CK225

TP212

EFMO

LDCNT2

LDCNT1

TP204

CK207

TP208

CK202

CK201

CK203

TP202

RAA11

RAA1

RAA0

RAA4

RAA5

RAA6

RAA7

RAA8

RAOEX

RACASX

RAD2

RAD3

VDD2

DGND

RAA9

RARASX

RAWEX

RAD1

RAD0

ACRCER

RAA10

DGND

VDD2

SYSD7

SYSD6

SYSD5

SYSD4

SYSD3

SYSD2

SYSD1

SYSD0

RSTX

DINTX

MCCK

COUT

SENSE

FOK

ADPON

DAPON

OPTCNT

VDD1

VREF

AVCC2

DGND

EFMI

BIN

EIN

FIN

AIN

AGND

TCG

SLDRF

TRDRR

TRDRF

X176KO

TEST2

FODRF

FODRR

WBI

VBAT

LEDON1

EMPH

LDCNT2

LDCNT1

PLLBVC

VPO

DILOCK

VDD1

DGND

TEST0

TEST1

VXI

X1I

X1O

DIN

DOUT

DGND

LRCK

BCLK

DFCK

ADDATA
DADATA

9

8

7

6

5

4321

2

1

2223 24 25212019181716151413121110

54 53 52 51555657585960616263646566676869707172737475

29
28
27
26

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

10
11
12

15
14
13

18
17
16

21
20
19

24
23
22

97
98

99

98

99

100

100

96

95

94

93

92

91

90

89

88

87

86

85

84

83

82

81

80

79

78

77

76

73
74
75

HDON

76
77

48
49
50
51
52

23
24
25
26
27

78

TEMON

TOTMON

FEMON

SYRDX

SYWRX

SYRS

AVCC

EFMMON

EFMO
X700KO
TCRS

PLCK

RAA3
RAA2

SPDRR

SPDRF

SLDRR

VCC

A10

VCC

A3

A2

A1

A0

RAS

WE

I/O2

I/O1

GND

I/O4
I/O3

CAS

OE
A9

GND

A8
A7
A6
A5
A4

9

8

7

6

5

4

3

2

1

SYD7

SYD4

SYD3

SYRS

SYRD

SYD6

SYD5

SYD2

SYD1

SYD0

SYWR

RCAULT

INPGCK

MCPGIN

INPGIN

RFPCNT

TP417

TP416

BEEP
SGAIN

OPICGA

TP415

PBMUTE

AUSCLK
AUDATA

DSPSCK

DSPSTB

DSPDAT

CHGCNT

CIN

DISCPR

SPIN

DISC

DINT

FP31

FP32

TP412

LDVAR

TEMP

RKEY

STDCK

HKEY2

HKEY1

PLVBAT

PLVDCI

FP66

TP406

_DCIN

FP59

TP400

FP67

SLCNT3

SLCNT1

FOK

SENSE

LDON

RPLAY

DCEXT

SLCNT2

TP401

TP402

AURESET

P17

P11

ARQD

DINT

AVSS

PBOPON

RADAT

RACLK

CHGCNT

DSPSCK

DSPDAT
DSPSTB

DISCPR

CIN
SPIN

LDVAR

RKCNG
TEMP
HKEY2
HKEY1

OSC1

FWE

SLCNT3

RPLAY

VSS

EXTAL

VCC

uSTBY

_DCIN

MD2

MD1

MD0

SLCNT1

EJSW

AVCC

SENSE

_RESET

XTAL

SLCNT2

Vref

RFPCNT

OPICGA

JPNP

RCPCNT

RCLAT

INPGCK

INPGI

MCPGI

TEST1

TEST0

VCC

VSS

SYWR

SYD7

SYD6

SYD5

SYD4

SYD3

SYD2

SYD1

SYD0

9

8

7

6

5

4 3 2 1

1
2

13 12 11 101415161718192021222324

23
24
25
26
27

49
50
51
52

74
75
76
77
78

98
99
100

25

29

28

27

26

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

54535251 5556 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75

LEDCNT3

LEDCNT2

LEDCNT1

STOP

PCNT3

PCNT2

BATON

EPRT

ELON

N.C.

N.C.

N.C.

EEPD

PBLAT

CKSTP

REC

DCON

_PLAY

EMPH0

DCNT1

LDON

XRST

EEPK

EPCS

97

98

99

100

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

BUZOUT
SGAIN
DISCP
MCMON

PCNT1

SYRS
SYRD

PLVBAT

PLVDCI

STDCK

RKEY

SCK0

PCLDI

RMDAT

FOK
DCEXT

TP4

0

STOP

ELON

DCON
PCNT3

EMPH0
PCNT2

PBAULT

DCNT1

HREC

XRT

BATON

(OG)

(GREEN)

(BLUE)

TP411A

TP408

TP409

TP411

8

7

6

5

TP413

VDD

OUT

VSS

4321

HEAD

S

G2

G1

D2

D1

S1S2G1

D1

S2

G2

S1

D2

A

B

20 21 22

1

22

N.C.

N.C.

3

1

2

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

+B

+B+B

+B

+B

+B

+B

+B

+B

+B

+B

4.22V

0V

0V

N.C.

N.C.

C165

0.033

R903
470

L608
10µH

C608

1

R907
180K

R908
100K

R905
100K

C908 0.33

C910 0.047
C909 0.047

C905 0.0022

C907 0.0022
C906 0.0022

R904
10K

C901

1

C911

0.1

C912

0.1

IC601

L604
22µH

L603

4.7µH

L601

22µH

L602
22µH

C602

1

C601

1

C603

1

C604

1

C151

0.01

R151
100K

R403

1K

SW901
DISC PROTECT

R404

100K

R407
100K

XL401

3.68MHz

C431

0.47

R431
330K

D431

1SS361

IC431

S-80820LNP

RESET

R461 100K

C454

0.0022

R464
220K

R463 100K

R462

22K

SW401
EJECT

R423

22K

R425

22K

IC401

IX0419AW

SYSTEM

MICROCOMPUTER

IC4

0

58X2

4

EEPR

R416

1K

TP4

0

C401

0.1

D432

1SS372

R402

100K

R405

10K

R424

22K

R422
100K

C202
47/6.3

L202
10µH

CN601

L100
10µH

C100

10/6.3

C201

10/6.3

R205
27K

Q103

FDG312 P

C605

0.1

C600
22/6.3

C902

0.01

R909

10K

IC651

LB1938T

MOTOR DRIVE

C652

0.1

D651
F10J2E

R351

3.9

R361

15

C361

0.039

IC354

C351
47P
(CH)

TP207

CN101

IC201

LR378161

ENDEC/SERVO

/ATRAC

CK204

CK205
CK206

C203

0.1

IC202

IX2824A

16MBIT

D-RAM

IC353

IC351

C357

0.1

C354 0.1

C113
1

C353

10/6.3

C112

0.1

C111

1

R111
12K

C114
5P(CH)

C109

1

R112

220K

R133
150K

TP139

R103

22K

CK108

R104

22K

R101

22K

R102

22K

C123

330P

C121
220P

C122

220P

CK111

C124
330P

CK113

CK112

CK114

C209

0.1

R204

1K

R161

1.2K

C171
33/6.3

L171
10µH

C172

33/6.3

R206
100K

C205

0.1

TP206

C207

0.1

C108

1

C131

0.1

IC101

C110

0.22

C132

0.22

C106

1

C133

0.22

C107

0.1

R139
39K

R140
390K

TP130

TP131

TP132

TP133

R138
390K

R137

56K

R135

56K

R136
390K

R132
1M

R131
150K

R134
1M

TP144

TP144

C102 1

C103

1

C204

0.47

R222

1M

C211 5P(CH)

XL201

33.8688MHz

C212

8P(CH)

Q901

RN1104

R920
100K

D351

SBE803

C130

0.1

R406

22K

R408
100K

R412
15K

R411
100K

R414

1K

R415

1K

IC601

BD6640KV

MOTOR DRIVE

IC353

FTD2005

HEAD DRIVER

IC354

CPH5608

HEAD DRIVER

IC351

74ACT02FT

HEAD DRIVER

R906
270K

IC101 IR3R58M

RF SIGNAL PROCESSOR

R207

680

L204

– 31 –

MD-MT877/MD-MT877C

7

8 9 10 11 12

Figure 31 SCHEMATIC DIAGRAM (2/2)

+

2.7V

–2.7V

+4.5V

+1.5V

+2.7V

+2.7V

+2.7V

–2.7V

+4.5V

LCD/KEY PWB-B

EXTENSION
TERMINAL,+

GND

TERMINAL,–

BATTERY
TERMINAL,+
EXTENSION
TERMINAL,+

BATTERY

TERMINAL,–

CONTROL
TERMINAL

5

678

EO

GND

VCC

ROSC

OSC

EIN

EIP

BY

OUT

BUF

S

Q R

RSFF

CMP

CTRL

VREF

ERRAMP

STAND

VCC2R5V

10
11
12

15
14
13

18
17
16

21
20
19

24
23
22

VCC

A10

VCC

A3

A2

A1

A0

RAS

WE

I/O2

I/O1

GND

I/O4
I/O3

CAS

OE
A9

GND

A8
A7
A6
A5
A4

9

8

7

6

5

4

3

2

1

TP401

TP405

STOP

ELON

DCON
PCNT3

EMPH0
PCNT2

PBAULT

DCNT1

HREC

XRT

BATON

(OG)

(GREEN)

(BLUE)

TP411A

09

TP411

TP407

TP410

8

7

6

5

4
3
2
1

TP413

OPEN

HPLAY

STOP

HREC

VCCMICOM

5

43

2
1

DADATA
ADDATA

BCLK
LRCK

DFCK

ADPON
DAPON
OPTCNT
DIN
EMPH1

16

15

14

13

12

11

10

9

8

7

6

5

4 3 2 1

AINR

AINL

LRCK

SCLK

SDTI

SDTO

MCLK

DEM0

DEM1

VDD

VSS

PWDA

PWAD

AOUTL

AOUTR

VCOM

5
4 3

2

1

VCC

GND

8

7

6

5

4
3
2
1

8

7

6

5

4
3
2
1

EO

GND

VCC

ROSC

OSC

EIN

EIP

BY

OUT

BUF

S

Q R

RSFF

CMP

CTRL

VREF

ERRAMP

STAND

5

4 3

2
1

DCON

PCNT2

PBAULT

AURESET

BEEP

PBMUTE

AUDATA

AUSCLK

RCAULT

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

12 11 10

9 8 7 6 5 4 3 2 1

ATT

LIN

LLPFO

L–

L+ R+

R–

RLPFO

RIN

LHPVEE

LHPVCC

DAT

CLK

LAT

RHPVEE

RHPVCC

HP

BEEP

LPF

LPF

ATT

AMP&GAIN SEL.

AMP&GAIN SEL.

LOGIC

BIAS

INPGCK
INPGIN
MCPGIN

STOP

OPEN

DSPSTB
DSPSCK
DSPDAT
HREC
HPLAY
HKEY2
HKEY1

14

13

12

11

10

9

8

7

6

5

4

3

2

1

CNLAND1

LCD ASS'Y

7

6

5

4 3 2 1

24

23 22 21 20 19 18 17 16 15 14 13

12

11

10

9

8

7

6

5

4 3 2 1

VEE

VCC

DGND

ROUT

LOUT

RIHP

LIHP

AGND

RI

LI

L-CH

R-CH

6
5
4 3

2

1

6
5
4 3

2

1

6
5
4 3

2

1

PLVBAT

STDCK

BATON

CHGCNT

5

4 3

2
1

+

-

4
3 2

1

8

7

6

5

4
3
2
1

OUT
VDD

VSS

D

S1S1S2

S2

G2 G1

D

6
5
4 3

2

1

3

2
1

6
5
4 3

2

1 4

3 2

1

6
5
4 3

2

1

VSS

VDD

OUT

6

5

4

3 2 1

DCEXT

PLVDCI

_DCIN

PCNT3

RKEY

RPLAY

ELON

KEY

PLAY

R-CH

L-CH

9
8

7

6

5

4

3

2

1

Vout
GND

VCC

GND

R

L

R-CH

L-CH

4

3

2

1

8

7

6
5

4
3

2

1

DC-IN

TP804

TP803

NI-MH

EMPH0

23

1

3

2

1

D

G

S

G

D

S

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

+B

+B

+B

+B

+B

+B

+B

14

1

(–)

0V

0V

0V 1.87V

0V

4.43V

3.91V

4.47V

2.73V

(–)

2.21V

(–)

0V

0V

0V

0V0V0V

0.85V

0.86V

1.3V

5.39V

0V

4.65V

1.3V

0.78V

1.3V

5.38V

4.81V

5.39V

N.C.

N.C.

N.C.

LEDA02 TLGU1008

CNA01

LEDA03 CL190HBX

LEDA04

TLOU1008

RA16

330

QA01

2SC4738GR

RA15

10K

SWA10 FAST REVERSE

SWA12 ENTER

SWA07 VOLUME+

SWA08 STOP

SWA06 VOLUME–

RA01

5.6K

SWA03 BASS

RA02

8.2K

SWA02 PLAY

RA03
18K

SWA01 RECORD

RA04
56K

RA06

8.2K

RA07

18K

RA08

56K

SWA04 EDIT

SWA09 MODE

RA05

5.6K

SWA05 DISPLAY

SWA11

FAST FORWARD

CA01

0.1

CA02

0.1

RA13
18K

RA14

18K

RA12

33K

SWA13
OPEN/CLOSE

C270

1

R445

10K

Q443

2SC4738 GR

R441
120

C852

22/6.3

Q442

RN4911

6
5
4 3

2

1

R442
820

R812

100K

R813

2.2K

R815
100K

R816
100K

Q807

HN1C01 FU

R881
18K

C881

0.027

R882

10K

C860

1

C292

0.01

C774
1

C454

0.0022

R464
220K

R463

100K

R200

100K

C210

0.1

C200

1

IC200

5

4 3

2
1

C510 1

C509 1

TP463

C837

1

IC873

62GR4522

4.5V REGULATOR

C836

0.47

C859

1

IC404

5
4 3

2

1

TP500

C503

3.3/10

C505

0.001

C506

0.001

C501

0.0022

C502

0.0022

IC501

C500

10/6.3

C511

0.1

R501 470
R502 470

IC402
58X2404T
EEPROM

R416

1K

TP404

C401

0.1

D432

1SS372

R831
180K

C840
220/4

TP464

R731
47K

R733
47K

R732

47K

TP462

CN451

C202

7/6.3

L202
10µH

TP460

TP453

TP452

TP459

TP458

TP457

TP455

TP454

TP456

TP451

TP461

D801
RB521S30

R495

1K

R496

22

C493

0.47

Q493
2SA1832 GR

F841

0.4A

DC60V

TP841

R828

2.2K

R802
100K

Q802

FDN339N

R256
100K

R257

1M

R710

47

R822
100K

Q821

HN1C01FU

R821

2.2K

C253

0.01

R259

2.2K

R807
100K

Q806

HN1C01FU

R809
47K

R810
22K

Q805

2SA1832 GR

R808

560K

R829

100K

R282

47K

R254
1M

Q825
DTC144 EE

R817
100K

Q254
2SA1832 GR

R255
560K

R258
330K

IC271
75S54FU
OP AMP.

R278

22

C272

0.1

R277

2.2K

R274
56K

R275
15K

C273

0.1

C274 0.1

R276
120K

R272
470K

R273

47K

Q801

RN4904

TP801

TP805

TP806

IC801

R805
1M

R804
330K

Q803
2SA17457

R803

1K

R801

47K

Q804

HN1C01 FU

R281

1K

R291

2.2K
C291

1

R292
100K

R261
1M

R263
100K

R264

100

R262
330K

Q261

HN1C01 FU

R814

27K

R806
100K

R271
470K

R253

33K

C252

0.1

R251
22

Q251

2SA17457

C251

0.1

R252
560K

Q253

RN4904

IC251

S-80808LNP

RESET

Q252

FTD2017

C817

0.1
R818

47K

IC771
62GR2322

2.3V REGULATOR

5
4 3

2

1

C773

0.22

R850

22K

C850

0.1

C841
1

L841

4.7

I

C841

5
4 3

2

1

D841
F10J2E

C843

0.22

C842

33/6.3

TP842

D842
HRB0103B

C847

1

C846

0.1

R844

47

C845

0.1

C851

3.3

L851
10µH

C775
1

R871

10K

C863

1

C862

1

D861
F10J2E

D862

F10J2E

C776

1

D772
F10J2E

D771

F10J2E

IC871

TC7S86FU

EXCLUSIVE

OR GATE

IC851

C858

1

D851
F10J2E

D852

F10J2E

C876

1

C822
22/6.3

C823

220/4

C821

3.3

C828

1

C825

1

D822

HRB0103B

D821

D1FH3

IC821

L821
10µH

C838

0.1

R833

47

D832

HRB0103B

C833

0.1

C834

0.1

D831

HRB0103B

C832

0.1

C848

1

R841
100K

C844

10/6.3

IC842

62GR2522

2.5V

REGULATOR

C830

1

R824

10K

IC852

C857

33P

(CH)

R855
180K

C856
150P

(CH)

R857
560K

R853
270K

IC822

C827

82P

(CH)

C826
82P(CH)

R826

3.9M
R825

390K

R827
270K

R823

270K

R832
180K

R834

1.5M

C839

0.33

R854
10K

R717

1K

R711 6.8K

R719

6.8K

R712 6.8K

R720

6.8K
C734

0.1
C733

0.1

IC701
IR3R54N
AUDIO
AMP.

R714

10K

R713
10K

C712
100P
(CH)

C715

0.1

C711
100P(CH)

TP707

TP703

TP705

TP708

TP701

TP704

TP706

TP702

J701
OPTICAL/
LINE

C714

1

Q711

RN1444 A

C713

1

R718
1K

R715
100K

R716
100K

C703

0.01

R702

100

R701

100

C701

10/6.3

R703
100K

C702

10/6.3

C721 3.3/10

C723

0.001
C724

0.001

TP712

TP711

TP713

J702
MIC IN

TP714

C725

3.3/10

R723

6.8K

R724

6.8K

R725

100

C726

3.3/10

R726

39K

C722 3.3/10

R729 4.7K

R730 4.7K

R727

8.2K

C731

0.22

R728

1K

Q721

C765

0.22

C766

0.22

R766

15

R765

15

D495

MA8075M

D496
MA8075M

C492

1

C763
1

C764
1

L491
33

D493
015Z5.1Y

D491
015Z5.1Y

C491

0.1

R492
1K

D494
15AZ7.5Y

D492
15AZ7.5Y

TP726
TP725

TP724
TP723

TP722

TP721

TP728

J703
REMOTE
CONTROL/
EARPHONES
TERMINAL

TP727

TP772

TP771

C771

47/6.3

C869
47/6.3

IC202

IX2824AF

16MBIT

D-RAM

R758
100

R761

390K

IC703

IR3R59N

AUDIO AMP.

C754

1

R762

100K

R754
180K

C753

1

R757

2.2K
C760

0.1

C758

1

RDATA

VCCADDA

RDATA

GND

VCC

R412
15K

R411
100K

R415

1K

R413

1K

IC501
AK4551VT
AD/DA CONVERTER

IC200

62GR2522

2.5V REGULATOR

IC404

N7SZ86P5

GATE IC

IC801

S-80814ALNP

RESET

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

IC871

Q721

2SD1979 S

RIPPLE
FILTER

L704

L702

L703

L714
L713
L712
L711

L456

L452

L453

L454

L457

L458

C451

0.022

– 32 –

MD-MT877/MD-MT877C

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

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

A

B

C

D

E

F

G

H

1

23456

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

SW401
EJECT

R730

C703

R703

C604

R724

R723

Q721

R726

R725

C725

R716

R715

C714

C713

R713

R714

R727

R728

R292

C731

C726

Q711

IC601

C603

C292

C912

D651

C911

Q901

R412

R411

CN101

R161

C165

CK113

CK112

CK114

R422

IC202

XL201

C209

IC201

C201

CN601

TP411A

C204

R204

C203

C200

IC200

C210

R200

C652

IC651

C291

R291

C353

IC351

R920

C357

IC353

C354

R351

D351

C361

IC354

R361

C351

C251

IC251

R821

R256

IC822

R817

D801

IC801

Q801

Q802

Q825

R424

R251

FP59

R431

C830

R274

R259

C253

R258

R255

C270

R809

R275

R254

C272

C274

R277

Q254

Q821

C273

R810

R278

R828

R822

C839

R829

Q806

R806

Q804

Q261

R816

R813

Q807

R802

C881

Q805

R807

R808

IC431

C431

R831

R832

R834

IC852

IC271

IC842

IC401

D822

CK111

C130

C401

FP66

R425

D432

C860

D431

R871

C876

IC871

R423

C825

R857

R853

C857

R827

R823

R824

C827

C826

TP487A

R826

R825

R854

R833

C838

C836

D831

C834

C828

D832

C856

R856

C832

R855

R402

C833

C837

IC873

C844

C848

R841

R408

R406

R405

R407

R766

R765

C765

C766

IC703

R767

R768

D491

C492

D496

D495

D492

R492

L491

D494

C491

IC701

C722

R729

R907
R908

C721

IC771

C774

C503

C511

CN451

C753

IC404

C605

C905

R461

R463

R462

R904

C906

C910

C909

R909

Q442

Q443

R441

R442

C500

TP105A

FP67

R445

R903

C907

R404

C454

R464

R732

R733

R731

C760

R757

R712

C734

C733

R758

R754

R720

R719

R711

C758

C754

C902

R761

C712

C711

R762

C901

C723

C724

R906

R905

C601

C602

R413

IC402

R415

R414

R416

FP32

FP31

C212

C211

R222

R815

R814

TP201A

C207

R206

C205

R205

R257

R272

R271

R263

R264

R262

R261

R805

R804

R803

R882

R881

R812

R801

C817

R818

R276

R273

Q803

C773

C908

J701

OPTICAL/LINE IN

6

1

7

12

1318

19

24

1

5

10

45

40

35 30

26

25

20

15

100

95

90

8580

76

75

70

65

60

55

51 50

1

22

1

5

10

45

40

35

30

26

25

20

15

100

95

85

75

70

65

60

55

51

50

80

1

4

8

5

1

11

1

4

8

5

1

1

5

7

8

10

14

5

4

8

1

2

3

5

1

5

10

15

16

17

20

25

30
31

323540

45

48

49

50

55

60

64

1

5

13

15

20

24

10

12

1

5

13

15

20

24

10

12

1

14

5

4

3

1

1

3

4

5

3
4

5

1

1

354

11

4

4

5

885

3
4

5

1

3
4

1

2

13
5

4

1

3

4

2

J702

MIC IN

J703

REMOTE CONTROL/

EARPHONES

87

2

5

4

3

6

1

2

1

4

4

5

4

3

1

2

6

1

3

5

4

L452

L453

L454

L456

L457

L458

L713

L714

L204

L702

L703

L704

L711

L712

R207

C451

L103

1

FROM

OPTICAL

PICKUP
P35 9-G

FLEXIBLE PWB

MAIN PWB-A (TOP VIEW)

FLEXIBLE PWB

FROM

MECHANISM

FLEXIBLE PWB

P35 9-A

1

11

FLEXIBLE PWB

FROM

LCD/KEY PWB

P34 3-A

1

14

13

12

22

– 33 –

MD-MT877/MD-MT877C

7

8 9 10 11 12

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

J703

REMOTE CONTROL/

EARPHONES

TP728

TP901

R403

SW901

DISC

PROTECT

TP406

TP725

TP726

TP721

TP723

TP771

TP772

TP500

TP202

C502

C506

C764

C763

C501

TP722

TP724

C509

C510

TP727

R502

C505

R501

IC841

C842

IC501

D862

L171

L841

C841

C843

D861

D771

D772

TP463

C775

C862

C863

R850

C850

TP842

D493

R496

C171

TP458

TP461

R844

C845

TP464

D841

F841

0.4A,

DC60V

R495

C493

Q493

TP402

XL401

TP400

TP212

TP804

TP801

TP803

TP841

TP410

TP413

C252

R252

R253

Q252

Q253

Q251

TP404

TP113

TP114

TP118

C172

CK204

TP451

TP459

TP103

TP462

TP122

TP102

TP107

TP111

TP116

TP120

TP115

TP119

TP117

TP121

TP101

CK225

TP106

TP105

TP110

TP415

TP455

TP417

TP457

TP453

CK205

TP456

TP454

CK206

TP416

CK207

TP208

TP401

C823

C776

L604

D821

C847

D842

C846

C608

L608

TP460

IC821

L821

TP405

L601

L602

L603

TP211

C821

R717

C822

C600

C869

C771

TP711

J702

MIC IN

TP412

TP713

TP714

R701

TP712

TP708

R702

TP704

C702

TP487

J701

OPTICAL/LINE IN

C701

TP705

C851

C852

TP806

C859

TP703

TP701

TP351

C840

L851

TP452

R710

C715

R718

D851

IC851

D852

C858

TP352

TP702

TP707

CK201

TP706

TP201

TP655

TP205

TP654

TP652

TP653

TP651

CK203

TP209

TP210

TP407

TP409

TP408

TP660

TP658

TP659

TP657

TP661

TP656

TP610

TP411

CK202

R134

R133

R131
R132

R135

R136

C133

TP130

R139

R140

C121

C122

C123

C124

R137

R138

TP109

TP108

CK224

TP207

IC101

TP204

TP131

R101

R102

TP132

TP133

CK108

C131

TP203

CK222

CK102

R104

R103

TP100

TP805

C202

L202

Q103

C100

C103

C102

C111

C132

C113

C109

L100

C106

C110

C108

C112

C107

R112

TP139

TP206

C151

TP200

R151

R282

R281

C114

TP144

R111

1

5

10

12

13

15 20

24 25

30

35

36

37

40

45

48

SG

D

D

G

S

1

15

10

9

8

5

16

4

5

3

1

7

8

9

2

1

3

EXTENSION

BATTERY

TERMINAL,+

EXTENSION

TERMINAL,+

GND

TERMINAL,-

CONTROL

TERMINAL

BATTERY TERMINAL,-

BATTERY TERMINAL,+

11

9

7

5

8

6

3

4

15

2

14

10

1

MAIN PWB-A (BOTTOM VIEW)

– 34 –

MD-MT877/MD-MT877C

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

A

B

C

D

E

F

G

H

1

23456

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

LCD/KEY PWB-B(TOP VIEW)

LCD ASS'Y

P35 7-H

SWA13
OPEN/
CLOSE

CA02

RA06

CA01

RA08

RA07

RA05

LEDA03

LEDA02

LEDA04

QA01

RA16

RA15

SWA01

RECORD

SWA09

MODE

SWA07

VOLUME+

SWA10
FAST
REVERSE

SWA11

FAST FORWARD

SWA06
VOLUME–

SWA02

PLAY

SWA05

DISPLAY

SWA12

ENTER

SWA04
EDIT

SWA03
BASS

RA04

RA03

RA02

RA01

RA14

RA12

RA13

CNA01

SWA08

STOP

1

7

14

1

CN451

TO MAIN PWB

P32 2-F

FLEXIBLE

PWB

LCD/KEY PWB-B(BOTTOM VIEW)

– 35 –

MD-MT877/MD-MT877C

7

8 9 10 11 12

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

TO MAIN PWB

P32 2-D

M902

SLED MOTOR

M903

LIFT MOTOR

MECHANISM

FLEXIBLE PWB(5)

M901

SPINDLE MOTOR

MAGNETIC HEAD(3)

CN601

TO MAIN PWB

P32 2-B

OPTICAL PICKUP(4)

TO LCD/KEY PWB

P34 4-F

LCD ASS'Y(217)

CN101

CNA01

– 36 –

MD-MT877/MD-MT877C

VOLTAGE

PIN
NO.

VOLTAGE

1
2

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

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

100

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

IC401

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

1

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

PIN
NO.

VOLTAGE

IC101

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

IC201

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

–

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

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

IC501

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

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

IC701

IC842

0 V

2.8 V

2.6 V
0 V

2.5 V

IC202

IC351

IC651

IC200

IC404

IC871

IC353

IC601

IC703

IC771

IC801

IC354

3

1
2

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

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

3

100

1
2

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

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

3

1
2

4
5
6
7
8

9
10
11
12
13
14
15
16

3

1
2

4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

3

2

4
5

3

1
2

4
5
6
7

8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

3

1
2

4
5
6
7
8

3

1
2

4
5

3

1
2

4
5

3

1
2

4
5

3

1
2

4
5
6
7

8

9
10
11
12
13
14

3

1
2

4
5

3

1
2

4
5
6
7

8

3

1
2

4

3

37
38

40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56

39

1
2

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

3

1
2

4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

3

1
2

4
5

3

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

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

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

0 V

2.7 V

1.34 V
0 V

2.5 V

1.24 V

2.49 V
0 V

1.25 V

2.5 V

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

2.7 V

2.7 V
0 V
0 V
0 V
–

0.5 V

0.5 V
0 V

0 V

2.7 V

2.7 V
0 V

2.3 V

0 V

0.8 V
–
0 V

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

–
–
0 V
0 V
0 V

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

57
58
59
60
61
62
63
64

PIN
NO.

VOLTAGE

IC851

D
S
G

1.28 V
0 V

0.55 V

PIN
NO.

VOLTAGE

IC873

1
2

4
5

3

0 V

7.43 V

2.5 V
0 V

4.49 V

PIN
NO.

VOLTAGE

IC402

1
2

4
5
6
7
8

3

0 V

2.5 V
0 V
0 V

2.5 V
0 V

2.5 V

2.5 V

PIN
NO.

VOLTAGE

IC431

1
2

4

3

22.5 V

2.5 V
0 V
0 V

2.5 V

2.5 V
0 V
0 V

2.5 V

PIN
NO.

VOLTAGE

IC251

1
2

4

3

1.3 V

1.3 V
–
0 V

PIN
NO.

VOLTAGE

IC271

1
2

4
5

3

1 V
0 V

0.66 V
1 V

2.7 V

PIN
NO.

VOLTAGE

1

IC841

1.28 V

2.8 V

1.36 V

1.28 V
0 V

2

4
5

3

PIN
NO.

VOLTAGE

IC822

1
2

4
5
6
7
8

3

1.25 V

2.8 V

0.7 V
0 V

1.2 V

1.17 V

1.16 V

1.25 V

PIN
NO.

VOLTAGE

IC852

1
2

4
5
6
7
8

3

1.28 V

2.8 V

0.47 V
0 V

1.17 V

1.17 V

1.16 V

1.26 V

PIN
NO.

VOLTAGE

IC821

D
S
G

1.28 V
0 V

0.3 V

PIN
NO.

VOLTAGE

Q103

1
2

4
5
6

3

2.5 V

2.5 V

0.2 V

2.5 V

2.5 V

2.5 V

PIN
NO.

VOLTAGE

Q442

1
2

4
5
6

3

5.17 V

4.66 V

4.66 V

1.8 V
0 V
0 V

PIN
NO.

VOLTAGE

Q807

1
2

4
5
6

3

0 V
0 V

2.5 V
–
–

2.46 V

PIN
NO.

VOLTAGE

Q801

1
2

4
5
6

3

0.85 V

0.9 V

0.9 V
0 V
0 V

0.77 V

PIN
NO.

VOLTAGE

Q804

1
2

4
5
6

3

0 V
0 V
0 V
0 V

0.58 V

0.86 V

PIN
NO.

VOLTAGE

Q802

1
2
3

0 V

1.3 V

0.85 V
PIN

NO.

VOLTAGE

Q806

1
2

4
5
6

3

0 V

0.56 V

4.6 V
0 V
0 V
0 V

PIN
NO.

VOLTAGE

Q253

1
2

4
5
6

3

5.39 V
0 V
0 V
0 V

2.5 V

5.37 V

PIN
NO.

VOLTAGE

Q821

1
2

4
5
6

3

0 V

0.5 V
0 V
0 V

2.5 V

5.37 V

PIN
NO.

VOLTAGE

Q261

1
2

4
5
6

3

0 V
0 V
0 V
0 V

0.55 V

1.15 V

PIN
NO.

VOLTAGE

Q252

1
2

4
5
6
7
8

3

1.3 V

1.3 V

1.3 V

5.38 V

4.94 V
–
–

1.3 V

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

– 37 –

MD-MT877/MD-MT877C

WAVEFORMS OF MD CIRCUIT

NORM:200kS / s

1994 / 12 / 15 22:54:19

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

CH1 : 0.00V
CH2 : 0.000V

Main : 10K

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

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

T

TP208

(FEMON)

CK204

(FOK)

TP120

(F+)

CK206

(CIN)

Stopped

CH1=1mV

DC 10:1

CH3=5V

DC 10:1

CH4=2V

DC 10:1 (50ms/div)

50ms/div

CH2=500mV

DC 10:1

T

1

4

3

2

1

2

3

4

NORM:100MS / s

1994 / 12 / 16 00:24:17

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

CH1 : 0.00V
CH2 : 0.00V

Main : 5K

Zoom : 5K
CH3 : 0.00V
CH4 : 0.00V

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

T

IC501(9)

(SDTi)

IC501(11)

(MCLK)

IC501(12)

(SCLK)

IC501(10)

(LRCK)

Stopped

CH1=2V

DC 10:1

CH3=2V

DC 10:1

CH4=2V

DC 10:1 (50us/div)

50us/div

CH2=2V

DC 10:1

T

1

4

3

2

5
6

7

8

ENV

1994 / 12 / 16 01:03:40

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

CH1 : 0.00V
CH2 : 0.00V

Main : 10K

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

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

T

TP201
(EFMMON)

TP210

(TEMON)

TP209

(TOTMON)

Stopped

CH1=1V

DC 10:1

CH3=500mV

DC 10:1 (2ms/div)

2ms/div

CH2=2V

DC 10:1

T

1

2

9

10
11

ENV

1994 / 12 / 15 23:31:21

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

CH1 : 0.00V
CH2 : 0.00V

Main : 10K

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

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

T

IC201(25)
(SPDRR)

VM

Stopped

CH1=2V

DC 10:1 (50ms/div)

50ms/div

CH2=2V

DC 10:1

T

1

2

12

13

FULL 20MHz

BandwidthONSmooth

OFF

1994 / 12 / 18 09:26:46

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

CH1 : 0.00V
CH2 : 0.00V

Main : 10K

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

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

T

TP208

(FEMON)

TP210

(TEMON)

Stopped

CH1=2V

DC 10:1

CH3=2V

DC 10:1

CH4=2V

DC 10:1 (1s/div)

1s/div

CH2=2V

DC 10:1

1

2

ENV

1

10

1994 / 12 / 16 01:23:16

=Filter=

=Tracel= P-P 1.280V

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

CH1 : 0.000V
CH2 : 0.00V

Main : 1K

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

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

T

TP201

(EFMMON)

Stopped

CH1=2V

DC 10:1 (500ms/div)

500ms/div

1

MORM:200MS/s

9

1994 / 12 / 15 08:57:26

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

CH1 : 0.00V
CH2 : 0.00V

Main : 10K

Zoom : 10K
CH3 : 0.000V
CH4 : 0.0V

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

T

TP201

(EFMMON)

TP210

(TEMON)

TP209

(TOTMON)

Stopped

CH1=2V

DC 10:1 (2ms/div)

2ms/div

CH2=2V

DC 10:1

1

2

ENV

T

CH3=500mV

DC 10:1

9

10
11

1994 / 12 / 15 09:58:45

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

CH1 : 0.00V
CH2 : 0.00V

Main : 10K

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

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

T

TP208

(FEMON)

TP210

(TEMON

)

IC201(25)

(SPDRR)

VM

Stopped

CH1=2V

DC 10:1

CH3=2V

DC 10:1

CH4=2V

DC 10:1 (1s/div)

1s/div

CH2=2V

DC 10:1

1

3

4

2

ENV

1
10
12

13

1994 / 12 / 15 08:39:46

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

CH1 : 0.00V
CH2 : 0.00V

Main : 10K

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

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

T

TP210

(TEMON)

Stopped

CH1=2V

DC 10:1

CH3=2V

DC 10:1 (1s/div)

1s/div

CH2=2V

DC 10:1

1

NORM:1kS/s

10

1994 / 12 / 15 21:54:52

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

CH1 : 0.00V
CH2 : 0.00V

Main : 10K

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

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

T

T

TP201

(EFMMON)

TP210

(TEMON)

TP121

(T-)

Stopped

CH1=2V

DC 10:1

CH3=1V

DC 10:1

CH4=1V

DC 10:1 (500us/div)

500us/div

CH2=2V

DC 10:1

1

3

4

2

ENV

9

10

15

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

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

H to 80H with EEPROM control setting. After

completion restore 00

H.

1994 / 12 / 15 09:10:03

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

CH1 : 0.000V
CH2 : 0.00V

Main : 4K

Zoom : 4K
CH3 : 0.000V
CH4 : 0.0V

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

T

CK108

(ADIPO)

Stopped

CH1=500mV

DC 10:1 (20us/div)

20us/div

CH2=2V

DC 10:1

ENV

14

1000P

10K

TP

Measurement

– 38 –

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 ?

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".

No

Yes

Does the display operate normally ?

Is playback state set ?

Yes

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

No

Is audio output normal ?

Yes

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

No

Is recording/playback operation normal ?

Yes

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

No

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

No

Yes

Is operation normal when the main body button is pressed ?

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

No

Does the pin 63 of IC401 oscillate ?

Replace XL401.

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

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

No

No

Normal.

Yes

Yes

– 39 –

MD-MT877/MD-MT877C

Yes

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

No

Yes

Is audio waveform output from J703 pins 3 and 4.

Check the pins 4 and 21 of IC703.

No

Yes

Is audio waveform output from IC703 pins 8 and 17.

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

12.

No

• Abnormal display.

No

Yes

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

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

Yes

Check between IC401 and
CN451.

No

Check the periphery of IC401.

• Audio playback clrcult.

Is audio waveform output from IC501 pins 15 and 16 ?

Check headphones jack, and periphery of headphone.

In the normal playback mode, LCD play time display functions, but no audio is heard.

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

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

No

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

Check the IC201 periphery.

Yes

Does waveform appear on the IC601 pin 15 ?

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

Replace the spindle motor.

Yes

No

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

No

Replace IC601.

Yes

– 40 –

MD-MT877/MD-MT877C

• Recording/playback operation.

Yes

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

No

Does level of pins 43 of IC401 and pin 86 of change
depending on record and playback ?

Is RF pattern output from IC201 pin 50 ?

Yes

No

Check for soldering failure of IC201 .

No

Check periphery of IC401 and IC101.

Check whether there is any damage in IC101, periphery of
laser diode.

Yes

Check for defects of IC351 in head drive flexible PWB,
head, flexible PWB.

No

No

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

No

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.

No

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

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

Yes

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

Yes

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.

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

Yes

Yes

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

Change MSL from 00H to 80H by the control setting of EEPROM. After completing the operation, return in to 00H.

Insert a low reflection disc, and ascertain audio output by normal playback, and then set TEST REC mode.

– 41 –

MD-MT877/MD-MT877C

FUNCTION TABLE OF IC

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).

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

Pin No.

Function

Port Name

Terminal Name Input/Output

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

– 42 –

MD-MT877/MD-MT877C

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.

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

Pin No.

Function

Port Name

Terminal Name Input/Output

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

– 43 –

MD-MT877/MD-MT877C

56* EXPORT4

Undecided justice

Output Not used Not used
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

Pin No.

Function

Port Name

Terminal Name Input/Output

Remarks

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

TEST1

Details

*1: List of TEST port settings

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

EMPH1 EMPH0

Details

*2: List of EMPH port settings

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

LDCNT2

LDCNT1

Details

*3: List of LDCNT port settings

TEST0

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

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

– 44 –

MD-MT877/MD-MT877C

— M E M O —

MD-MT877/MD-MT877C

PARTS GUIDE

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.

“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

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

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%.

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.

MD-MT877(S)

MODEL MD-MT877C(S)

PORTABLE MINIDISC RECORDER

PRICE
RANK

DESCRIPTION

NO.

PARTS CODE

NO. PARTS CODE

PRICE

RANK

DESCRIPTION

MD-MT877/MD-MT877C

– 1 –

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,

IX0419AW
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,

XC6372C281PR
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

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,

RN4904
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,

RN4904
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

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

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

NO.

PRICE

RANK

DESCRIPTIONPARTS CODE

NO. PARTS CODE

PRICE
RANK

DESCRIPTION

MD-MT877/MD-MT877C

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

RESISTORS

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

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 A B 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

– 2 –

PRICE
RANK

DESCRIPTION

NO.

PARTS CODE

NO. PARTS CODE

PRICE

RANK

DESCRIPTION

MD-MT877/MD-MT877C

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

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

Square Tip Type Fuse,0.4A,DC60V
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]

MD MECHANISM PARTS

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

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]

CABINET PARTS

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

[MD-MT877 (S)]

202 GCABB3013AWM1 J Bottom Cabinet Ass’y

[MD-MT877C (S)]
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 AA 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 AA 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

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 –

NO.

PRICE

RANK

DESCRIPTIONPARTS CODE

NO. PARTS CODE

PRICE
RANK

DESCRIPTION

MD-MT877/MD-MT877C

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

Polyethylene Bag,Battery Charger

ACCESSORIES

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

(From Serial No.105ЧЧЧЧЧ)

QCNWG0382AFZZ J AK Connecting Cord,RCA Type

(To Serial No.104ЧЧЧЧЧ)

QCNWG0422AFZZ J AQ Connecting Cord,Optical Type

1 RADPA3048AWZZ J AW AC Adaptor

RPHOH0176AFSA J AT Earphones
RRMCW0011AWSA J BK Remote Control

(To Serial No.102ЧЧЧЧЧ)

RRMCW0012AWSA J Remote Control

(From Serial No.103ЧЧЧЧЧ)
RUNTZ0032AWM1 J BL Battery Charger
TINSK0115AWZZ J AH Operation Manual

[MD-MT877C (S)]
TINSZ0639AWZZ J AE

Operation Manual [MD-MT877 (S)]
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

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

(TEAC Test MD)

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

(TEAC Test MD)

BATTEY CHARGER PARTS

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

(Not Replacement 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

– 4 –

MD-MT877/MD-MT877C

A

B

C

D

E

F

G

H

1

23456

Figure 5 MD MECHANISM EXPLODED VIEW

– 5 –

5

3

10

4

2

1

17

6

9

7

M901

12

15

M902

M903

11

501

16

501x2

502

506x3

504x2

505

503

507

14

508

13

MD-MT877/MD-MT877C

A

B

C

D

E

F

G

H

1

23456

Figure 6 CABINET EXPLODED VIEW

– 6 –

OPENOPEN

OPENOPEN

LCD PWB

MD MECHANISM

223x2

224x2

225x4

MAIN PWB

603x2

603x2

212x3

604x4

603x2

205

201

207

210

209

208

212

212

214

215

216

217

231

230

203

218

219

220

221

204

601

226

602

227

601

235

237

236

232

601

603

603

603

228

229

236

202

233

234

213

239x3

240

603

238

241

242

MD-MT877/MD-MT877C

A

B

C

D

E

F

G

H

1

23456

– 7 –

Figure 7 BATTERY CHARGER EXPLODED VIEW

22-1

22-5x2

22-4

22-3

22-6

22-5x2

22-2

22-7

22-7

22

22-9

22-8

MD-MT877/MD-MT877C

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

Setting position of switches and knobs

Remote Control HOLD CANCEL

– 8 –

Operation Manual

Carrying Case

Earphones

Battery Case

AC Adaptor

Packing Case
SPAKC1155AWZZ

Connecting Cord,
RCA Type

Battery

Battery
Carrying
Case

Remote
Control

Label, Caution

Battey Charger

AC Adaptor Pad
SPAKZ0630AWZZ

Sheet, Bubble
SPAKZ0692AWZZ

Packing Add.
SPAKA0284AWZZ

Quick Guide

Connecting Cord,
Optical Type

Polyethylene Bag, Battey Charger
SSAKA0009AWZZ

:Not Replacement Item

— M E M O —

MD-MT877/MD-MT877C

– 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.

A0103-1267DS•HA•M
SC • LAG • SL

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

Printed in Japan

©