MD-MT20/20C/20W
SERVICE MANUAL
No. S6943MDMT20//
MD-MT20(S)
MD-MT20C(S)
MD-MT20W(BL)
MD-MT20W(GL)
Illustration: MD-MT20/20C
MD-MT20W(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.
Illustration: MD-MT20W
CONTENTS
SAFETY PRECAUTION FOR SERVICE MANUAL (MD-MT20W ONLY).............................................................................. 2
SPECIFICATIONS ................................................................................................................................................................. 3
NAMES OF PARTS ............................................................................................................................................................... 4
OPERATION MANUAL .......................................................................................................................................................... 5
QUICK GUIDE (MD-MT20 ONLY) ......................................................................................................................................... 8
DISASSEMBLY.................................................................................................................................................................... 10
REMOVING AND REINSTALLING THE MAIN PARTS....................................................................................................... 11
ADJUSTMENT ...................................................................................................................................................................... 12
NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 25
TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 25
VOLTAGE ............................................................................................................................................................................ 26
BLOCK DIAGRAM ............................................................................................................................................................... 27
SCHEMATIC DIAGRAM ...................................................................................................................................................... 28
WIRING SIDE OF P.W.BOARD........................................................................................................................................... 31
WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 36
TROUBLE SHOOTING ........................................................................................................................................................ 37
FUNCTION TABLE OF IC.................................................................................................................................................... 40
CIRCUIT DESCRIPTION ..................................................................................................................................................... 42
PARTS GUIDE/EXPLODED VIEW
PACKING OF THE SET (MD-MT20 ONLY)
Page
SHARP CORPORATION
– 1 –
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
MD-MT20/20C/20W
SAFETY PRECAUTION FOR SERVICE MANUAL (MD-MT20W ONLY)
Precaution to be taken when replacing and servicing the Laser Pickup.
The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class I Requirements.
However, the following precautions must be observed during servicing to protect your eyes against exposure to the laser beam.
(1) When the cabinet has been removed, the power is turned on without a compact disc, and the Pickup is on a position
outer than the lead-in position, the Laser will light for several seconds to detect a disc. Do not look into the Pickup Lens.
(2) The Laser Power Output of the Pickup inside the unit and replacement service parts have already been adjusted prior
to shipping.
(3) No adjustment to the Laser Power should be attempted when replacing or servicing the Pickup.
(4) Under no circumstances look directly into the Pickup Lens at any time.
(5) CAUTION - Use of controls or adjustments, or performance of procedures other than those specified herein may result
in hazardous radiation exposure.
CAUTION
This Portable MiniDisc Recorder is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT label is located on the bottom.
Use the Portable MiniDisc Recorder only in accordance with the instructions given in
this manual and do not attempt to interfere with the interlock switch or make any
other adjustment as this may result in exposure to hazardous radiation.
Laser Diode Properties
Material: GaAIAs
Wavelength: 785 nm
Pulse time:
Read mode; 0.8 mW Continuous
Write mode; max. 10 mW 0.5S
min. cycle 1.5S
Repetition
VARO ! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.
VARNING! Osynlig laserstralning när denna del är öppnad och spärren är urkopplad. Betrakta ej strälen.
Precaution to be taken when replacing and servicing the laser pickup.
The following precautions must be observed during servicing to protect your eyes against exposure to the laser.
Warning of possible eye damage when repairing:
If the AC adaptor or batteries are connected when the top houising (disc cover) of the unit is removed, and the PLAY key is
pressed, the laser will light up during focus access (2-3 seconds). (Fig. 2-1) During the operation, the laser will leak from the
opening between the magnetic head and the mechanical chassis (Fig. 2-2). In order to protect your eyes, you must not look
at the laser during repair. Before repairing be sure to disconnect the AC adaptor and remove the batteries.
Magnet head
Optical pick-up
Top Cabinet
Mechanism
Chassis
Spindle motor
Magnet Head
Main PWB
Laser Beam
Optical Pick-Up
Figure 2-1 Figure 2-2
– 2 –
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO
THE OPERATION MANUAL.
SPECIFICATIONS
MD-MT20/20C MD-MT20W
■ General
Power source:
Power consumption:
Output power:
Charging time:
Battery life:
DC 2.4V: Rechargeable Nickel-Metal Hydride battery (ADDC 5V: AC adaptor (AC 120V, 60 Hz)
DC 3.0V: Commercially available, “AA” size (LR6), alkaline
DC 4.5V: Separately available car adaptor, AD-CA20X
7.5W(AC adaptor)
RMS; 20 mW (10 mW + 10 mW)
(0.2% T.H.D.)
Approx. 4 hours (90 %)
Approx. 6 hours (fully charged)
(When using the AC adaptor included with the unit)
T20BT) x 1
battery x 2
(for cars with a 12-24V DC negative ground elec-
trical system)
When using the rechargeable
battery (fully charged) included
with the unit
Continuous recording:
Approx. 7.5 hours
Continuous play:
Approx. 12 hours
When using two, commercially
available, high capacity, “AA”
size (LR6), alkaline batteries
Continuous recording:
Approx. 7.5 hours
Continuous play:
Approx. 15 hours
General
Power source:
Power consumption:
Output power:
Charging time:
Battery life:
MD-MT20/20C/20W
DC 2.4V: Rechargeable Nickel-Metal Hydride battery (ADDC 5V: AC adaptor (AC 110 - 240V, 50/60 Hz)
DC 3.0V: Commercially available, “AA” size (LR6), alkaline
DC 4.5V: Separately available car adaptor, AD-CA20X
0.15A (AC adaptor)
RMS; 20 mW (10 mW + 10 mW)
(0.2% T.H.D.)
Approx. 4 hours (90 %)
Approx. 6 hours (fully charged)
(When using the AC adaptor included with the unit)
T20BT) x 1
battery x 2
(for cars with a 12-24V DC negative earth electri-
cal system)
When using the rechargeable
battery (fully charged) included
with the unit
Continuous recording:
Approx. 7.5 hours
Continuous play:
Approx. 12 hours
When using two, commercially
available, high capacity, “AA”
size (LR6), alkaline batteries
Continuous recording:
Approx. 7.5 hours
Continuous play:
Approx. 15 hours
● The continuous recording time is for analog inputs when the volume level is set to “VOL
0”.
● The continuous play time shows the value when the volume level is set to “VOL 15”.
● The above values are the standard values when the unit is charged and used at an
ambient temperature of 68°F (20°C).
● The operating time when using an alkaline battery may be different, depending on the
type and manufacturer of the battery, and on the operating temperature.
Input sensitivity:
Output level:
Dimensions: Width: 3-7/16"(87.9 mm)
Weight: 0.52 lbs. (235 g) with rechargeable battery
Input jack: Line/optical digital, microphone (powered by the main unit)
Output jack: Headphones (impedance: 19 ohms)/remote control unit
Recording level Reference input level Input impedance
MIC H 0.25 mV 10 k ohms
MIC L
LINE 100 mV 20 k ohms
Headphones — 10 mW + 10 mW 16 ohms
LINE
Height: 1-3/16" (29.8 mm)
Depth: 3-1/8" (79.7 mm)
2.5 mV 10 k ohms
Specified
output
250 mV
(-12dB)
Maximum
output level
Load
impedance
—
10 k ohms
■ MiniDisc Recorder
Type: Portable MiniDisc recorder
Signal readout: Non-contact, 3-beam semi-conductor laser pick-up
Audio channels: Stereo 2 channels/monaural (long-play mode) 1 channel
Frequency response:
Rotation speed: Approx. 400 – 900 rpm
Error correction: ACIRC (Advanced Cross Interleave Reed-Solomon Code)
Coding: ATRAC (Adaptive Transform Acoustic Coding), 24-bit com-
Recording method: Magnetic modulation overwrite method
Sampling frequency:
Wow and flutter:
20 – 20,000 Hz (± 3 dB)
puted type
44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz,
and then recorded.)
Unmeasurable (less than ±0.001% W. peak)
The continuous recording time is for analogue inputs when the volume level is set to
“VOL 0”.
The continuous play time shows the value when the volume level is set to “VOL 15”.
The above values are the standard values when the unit is charged and used at an
ambient temperature of 20°C (68°F).
The operating time when using an alkaline batteries may be different, depending on
the type and manufacturer of the battery, and on the operating temperature.
Input sensitivity:
Output level:
Dimensions: Width: 87.9 mm (3-7/16")
Weight: 235 g (0.52 lbs.) with rechargeable battery
Input socket: Line/optical digital, microphone (powered by the main unit)
Output socket: Earphones (impedance: 32 ohms)/remote control unit
Recording level Reference input level Input impedance
MIC H 0.25 mV 10 k ohms
MIC L
LINE 100 mV 20 k ohms
Earphones — 10 mW + 10 mW 32 ohms
LINE
Height: 29.8 mm (1-3/16")
Depth: 79.7 mm (3-1/8")
2.5 mV 10 k ohms
Specified
output
250 mV
(-12dB)
Maximum
output level
Load
impedance
—
10 k ohms
MiniDisc Recorder
Type: Portable MiniDisc recorder
Signal readout: Non-contact, 3-beam semi-conductor laser pick-up
Audio channels: Stereo 2 channels/monaural (long-play mode) 1 channel
Frequency response:
Rotation speed: Approx. 400 – 900 rpm
Error correction: ACIRC (Advanced Cross Interleave Reed-Solomon Code)
Coding: ATRAC (Adaptive Transform Acoustic Coding), 24-bit com-
Recording method: Magnetic modulation overwrite method
Sampling frequency:
Wow and flutter:
20 – 20,000 Hz (± 3 dB)
puted type
44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz,
and then recorded.)
Unmeasurable (less than ±0.001% W. peak)
Specifications for this model are subject to change without prior
notice
– 3 –
MD-MT20/20C/20W
Main unit
1. Monaural Long-Play Mode Indicator
2. Record Indicator
3. Level Meter
4. Fast Play Indicator
5. Repeat Indicator
6. TOC Indicator
7. Battery Indicator
8. Random Indicator
9. Track Number Indicator
10. Character/Time Information Indicator
11. Synchro Recording Indicator
12. Disc Mode Indicator
13. Disc Name Indicator
14. Track Name Indicator
15. Remaining Recording Time Indicator
16. Total Track Number Indicator
17. Edit/Auto Mark/Time Mark Button
18. Mode Button
19. Display/Character Select Button
20. Bass/Delete Button
21. Enter/Fast Play/Synchro Button
22. Volume Up/Cursor Button
23. Volume Down/Cursor/Charge Button
24. Record/Track Mark Button
25. Fast Reverse/Recording Level Down/
Name Select Button
26. Stop/Power Off Button
27. Play/Pause Button
28. Fast Forward/Recording Level Up/
Name Select Button
NAMES OF PARTS
Illustration: MD-MT20/20C
11
12
13
14
17
29
123456
15 16
18 20 21
19
28
27262524
7
8
9
10
22
23
30
31
29. Open Lever
30. Remote Control/Earphones Socket
31. Optical/Line Input Socket
32. Microphone Input Socket
33. Hold Switch
34. 5V DC Input Socket
35. Battery Cover
Remote control unit
1. Headphones Jack (MD-MT20/20C)
1. Earphones Socket (MD-MT20W)
2. Fast Reverse/Recording Level Down/
Name Select Button
3. Hold Switch
4. Play/Pause Button
5. Fast Forward/Recording Level Up/
Name Select Button
6. Stop/Power Off Button
7. Volume Up/Cursor Button
8. Bass/Delete/Track Mark Button
9. Volume Down/Cursor Button
1
2
3
32
33
34
35
4
5
6
7
8
9
– 4 –
OPERATION MANUAL
POWER SOURCE
This unit can be used with the following power sources: a rechargeable battery, an AC
adaptor, commercially available alkaline batteries, and a separately available car adaptor
(AD-CA20X).
Rechargeable battery power
When the rechargeable battery is used for the
first time or when you want to use it after a
long period of disuse, be sure to charge it fully.
1
Open the battery cover.
Slide the battery cover as far as it will
go to the outside and then lift to open it.
If the battery cover is lifted without be-
ing slid all the way out, it may break.
2
Insert the rechargeable battery accord-
ing to the polarity marked on the bottom
of the unit.
3
Close the battery cover.
4
Plug the AC adaptor into the AC socket,
and then insert the plug on the AC adap-
tor lead into the DC IN 5V socket.
5
Press the CHARGE (VOLUME down)
button of the main unit to begin charg-
ing.
“
” will appear, and the battery
will begin charging.
After about 4 hours have passed,
“
” will go out.
This indicates that the battery charg-
ing is about 90% compleate.
To charge the battery fully, continue
charging for about 2 more hours.
(In this case, you do not need to press
the CHARGE button. Even if the
CHARGE button is pressed, “
”
will not appear.)
Notes:
After charging has been completed, the
AC adaptor may be left connected.
(For example, when charging at night)
The battery will not be charged when the
power to the main unit is turned on.
Do not force open the battery cover too wide.
Do not use a rechargeable battery or an
AC adaptor other than those specified
(ACCESSORIES).
The charging time will vary, depending
on the condition of the battery.
When the battery is charged for the first
time or is charged after not being used
for a long period, the operating time may
be shorter than normal.The battery life
will recover with normal use i.e. charg-
ing and discharging.
T o avoid shortening the service life of the
battery only recharge the battery after it
has been completely discharged.
1
2
3
5
4
AC 110-240V,
50/60 Hz
Insert securely,
all the way in.
To the DC IN 5V socket
AC 120V,
60 Hz
Insert securely,
all the way in.
To the DC IN 5V jack
For MD-MT20/20C
For MD-MT20W
RECORDING USING THE OPTICAL DIGITAL CABLE
This is the method used for recording digi-
tal signals from CDs or MDs exactly as they
are stored on the original. Compared to re-
cordings made from analogue inputs, digi-
tal recordings have extremely high-quality
sound.
1
Connect the external equipment.
2
Start recording.
Synchro recording:
Before starting a synchro recording,
perform the following steps on the
equipment connected to this unit.
(1) First, put it in the playback mode.
(2) Next, put it in the pause mode.
(3) Finally, position it at the beginning
of the track you want to record.
(1) Insert a recordable MiniDisc, and
then press the REC button.
(2) Press the ENTER/SYNC button.
(3) Start the playback on the equipment
connected to this unit.
Manual recording:
(1) Insert a recordable MiniDisc, and
then press the REC button.
(2) Press the button.
When recording from digital inputs,it
is not necessary to adjust the record-
ing level.
Notes:
This unit incorporates a sampling rate
converter.
When this unit is connected to digital
equipment such as CS/BS tuners or DA T
tape recorders that use a different sam-
pling frequency (32 kHz or 48 kHz), re-
cordings can still be made. (The sam-
pling frequency of this unit is 44.1 kHz.)
When making a digital recording from a
portable CD player (if the player has a
sound skip prevention function and this
function is turned on) the optical output
will drop out and digital recording will not
be possible. Be sure to turn the sound
skip prevention function off.
There are cases where digital recording
may be impossible.
In the following cases digital recording is
impossible, even if you are using digital
cables.
When you attempt to make a new digital
recording from a track that was digitally re-
corded on a MiniDisc.
MiniDiscs are designed so that only first
generation digital copies can be made.
Further digital copies are prevented by
the SCMS (Serial Copy Management
System).
Playback
Digital cable
CD player, MD
player, etc.
Digitally recorded MiniDisc
Analogue recording is
possible.
Recording
Playback
Digital cable
Recording
MD player
MD-MT20/20C/20W
– 5 –
MD-MT20/20C/20W
If the hold function is active whilst the power
is turned off, the power cannot be turned
on by mistake and the battery will not be
accidentally drained.
CONVENIENT OPERATION OF THE UNIT
< How to read the battery indicator >
When the battery is completely discharged,
the battery indicator will flash. Recharge the
battery or replace the alkaline batteries with
a new one.
When the battery has run completely out,
“BATT EMPTY” will appear. Then, the
power will be disconnected automatically.
Notes:
When using the unit with alkaline batteries
or a rechargeable battery, the battery indi-
cator will not correctly display the remain-
ing capacity for approximately 10 seconds
after the power has been turned on.
When the AC adaptor included with this unit
or a separately available car adaptor is
used, the battery indicator will not be shown.
The number of bars shown in the battery
indicator may increase or decrease, de-
pending on the operation being performed.
This is normal.
To prevent the unit from being
operated by mistake
To avoid accidental operation of the unit,
use the hold function.
Move the HOLD switch to the safety posi-
tion (direction indicated by the arrow).
When the unit is in the hold mode, press-
ing the buttons will have no affect.
To cancel the hold mode, move the
HOLD switch away from the safety po-
sition (the opposite direction of the ar-
row).
Battery indicator
Since the battery level is very low, you
cannot start recording or editing.
When the battery
level is high
When the battery
level is very low
Remote
control unit
Main
unit
Can be operated
from either the
remote control unit or
the main unit.
Can only be operated
from the remote
control unit.
Can only be operated
from the main unit.
Cannot be operated
from either the
remote control unit or
the main unit.
Cancel
Cancel
Cancel
Cancel
Hold
Hold
Hold
Hold
Checking the remaining amount
of battery level
The remaining amount of battery level is
shown by the battery indicator (
) dur-
ing operation.
TROUBLESHOOTING
Moisture condensation
In the following cases, condensation
may form inside the unit.
Shortly after turning on a heater.
When the unit is placed in a room where
there is excessive steam or moisture.
When the unit is moved from a cool
place to a warm place.
When the unit has condensation inside,
the disc signals cannot be read, and the
unit may not function properly.
If this happens, remove the disc.
The condensation should evaporate in
approximately 1 hour. The unit will then
function properly.
Many potential “problems” can be resolved by the owner without calling a service techni-
cian.
If something seems to be wrong with this product, check the following before calling your
authorised SHARP dealer or service centre.
PROBLEM CAUSE
The unit does not turn
on.
Is the AC adaptor disconnected?
Is the battery exhausted?
Is the unit in the hold mode?
Has condensation formed inside the unit?
Is the unit being influenced by mechanical shock or 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 earphone plug in-
serted firmly?
Is the battery exhausted?
Is the unit being subjected to excessive vibration?
Has the track number or character information been
written 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 oc-
cur whilst recording or editing?
Is the unit in the hold mode?
Is an optical signal being output from the external equip-
ment?
Read the operation manual for the external equipment.
No sound is heard from
the earphones.
When the operation
buttons are pressed, the
unit does not respond.
Some sounds are
skipped.
The MiniDisc cannot be
ejected.
Recording and editing
are impossible.
If trouble occurs
When this product is subjected to strong
external interference (mechanical shock,
excessive static electricity, abnormal sup-
ply voltage due to lightning, etc.) or if it is
operated incorrectly, it may malfunction.
If such a problem occurs, do the following:
1. Unplug the AC adaptor from the AC
socket.
2. Remove the battery.
3. Leave the unit completely unpowered for
approximately 30 seconds.
4. Plug the AC adaptor back into the AC
socket and retry the operation.
If strange sounds, smell or smoke come out
of the unit or an object is dropped into the
unit, remove the AC adaptor from the AC
socket immediately and contact an
authorised SHARP service centre.
– 6 –
MD-MT20/20C/20W
When the number of tracks used reaches
the limit, regardless of the remaining re-
cording time, further recording will be
impossible.
(Maximum number of tracks: 255)
If a MiniDisc has been recorded or ed-
ited repeatedly or if a MiniDisc has
scratches on it, it may not be possible to
record the maximum number of tracks on
it.
If there are scratches on a disc, the unit
will automatically avoid recording in those
areas. The recording time will be reduced.
When the remaining recording time of a
disc is displayed, short tracks less than
12 seconds long may not be included in
the total.
For MiniDiscs on which repeated record-
ing and editing operations were per-
formed, the COMBINE function may not
work.
A cluster (about 2 seconds) is normally the
minimum unit of recording. So, even if a track
is less than 2 seconds long, it will use about
2 seconds of space on the disc.
Therefore, the time actually available for re-
cording may be less than the remaining time
displayed.
If there are scratches on discs, those sec-
tions will be automatically avoided (no record-
ing will be placed in those sections). There-
fore, the recording time will be reduced.
For MiniDiscs on which repeated record-
ing and editing were performed, some
sounds may be skipped whilst cueing and
reviewing.
If there are scratches or dust on a
MiniDisc, the track numbers following that
track will be increased by one.
MINIDISC SYSTEM LIMITATIONS
MiniDiscs are recorded using a different system than is used for cassette tapes or DAT
recordings. Therefore, the following conditions may be encountered, depending on how
the disc has been recorded or edited. These are due to system limitations, and should be
considered normal.
Even if the maximum recording
time of a MiniDisc has not been
reached, “DISC FULL” or “TOC
FULL” may be displayed.
Even if the number of tracks and
the recording time have not
reached the limit, “DISC FULL”
may be displayed.
Even if several short tracks are
erased, the remaining recording
time may not show an increase.
Two tracks may not be combined
in editing.
The total of the recorded time and
time remaining on a disc may not
add up to the maximum possible
recording time.
When recorded tracks are played
back using the cue and review op-
erations, some sounds may be
skipped.
A track number can be created in
the middle of a track.
● The battery is run down.
● Nothing is recorded.
● No copy can be made because of the
SCMS copyright system.
● A track cannot be edited.
● Recording cannot be performed
correctly due to vibration or shock in
the unit.
● Editing is impossible.
● The disc is scratched.
● Poor connection of the digital cable.
● The disc is out of recording space.
● The unit is in the hold mode.
● The EJECT lever was moved during
recording or editing.
● A disc has not been loaded.
● You tried to record on a playback- only
disc.
● Improper power is being supplied.
● The MD is write protected.
● You tried to record without loading an
MD.
● A playback-only MD was loaded and
the REC button was pressed when the
power was off.
● The disc is damaged.
● Since a track number is currently being
located or written to, the unit cannot
accept your command.
● You have come to the conclusion that
the unit is out of order.
● The temperature is too high.
● A large portion of the disc has been
damaged.
● There is no space left for recording
character information (track names,
disc names, etc.).
● The track has been protected from
being erased.
● A large portion of the disc has been
damaged.
● There is an error in the recorded signal.
● A disc which contains data other than
music was played.
● There is an error in the signal from the
disc.
● 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.
● Change the stop position of the track
and then try editing it.
● Re-record or replace it with another
recordable disc.
● Check the number of tracks.
● If the sound you hear is not right, try
recording again.
● Replace the disc with another
recordable disc.
● Connect the digital cable securely.
● Replace it with another recordable disc.
● Return the HOLD switch to its original
position.
● Turn off the power and remove the
MiniDisc.
● Load a disc.
● Replace it with a recordable disc.
● Use one of the specified power
sources.
● Move the write protection knob back to
its original position.
● Load a recordable MD.
● Replace it with a recordable MD.
● Reload the disc or replace it.
● Replace it with another recorded disc.
● Wait for a while and try the operation
again.
● To have it repaired, go to the distributor
where you purchased the unit.
● Turn off the power, and wait for a while.
● Replace it with another recorded disc.
● Replace it with another recordable disc.
● Edit the track with the device on which
it was recorded.
● Replace it with another recorded disc.
● Erase all of the signal errors, and then
try recording again.
● A disc which contains non-music data
cannot be played.
● Replace it with another recorded disc.
ERROR MESSAGES
( ): Error messages seen on the remote control.
Error messages
Remedy
BATT EMPTY
(Lo BATT)
BLANK DISC
(BLANK)
Can’t COPY
(Not REC)
Can’t EDIT
Can’t REC
(Not REC)
Can’t WRITE
DEFECT
(DEFECT)
Din UNLOCK
(UNLOCK)
READ ERROR
(E-READ)
DISC FULL
HOLD
(HOLD)
LOCKED
LOCK ERROR
NO DISC
PB DISC
POWER ?
SORRY
(SORRY)
SYSTEM ERR
(E-SYS)
TEMP OVER
(E-TEMP)
TOC ERROR
(E-TOC)
TOC FULL
Tr. Protect
U TOC ERROR
(E-UTOC)
? DISC
(?DISC)
Meaning
PROTECTED
– 7 –
MD-MT20/20C/20W
3
Connection /
Conexión
■ Analog recording
■
Grabación analógica
■ Digital recording
■
Grabación digital
■ Microphone
■
Micrófono
MIC IN
PLUG IN
POWER
Stereo microphone
Micrófono estéreo
Recording side
Lado de grabación
OPTICAL/
LINE IN
• To the line output jacks
on a stereo
•
A los enchufes de
salida de línea de un
equipo estéreo
LR
(RIGHT)
(DERECHO)
• Analog cable included with this unit
•
Cable analógico suministrado con este
(LEFT)
(IZQUIERDO)
Playback side
Lado de reproducción
Recording side
Lado de grabación
OPTICAL/
LINE IN
• Optical digital cable
(supplied)
•
Cable óptico digital
(suministrado)
Playback side
Lado de reproducción
Recording side
Lado de grabación
DIGITAL OUT
AUDIO OUT
1
2
4
3
5
5
1
Check the supplied accessories /
Compruebe los accesorios suministrados
2
Power source /
Alimentación
PORTABLE MINIDISC RECORDER
Quick Guide/Guía rápida
MD-MT20
■ Rechargeable battery power
■
Alimentación de la batería recargable
• AC 120V, 60Hz
•
120V CA, 60Hz
■ Alkaline battery power
■
Alimentación de la pila alcalina
■AC power
■
Alimentación de CA
• AC 120V, 60Hz
•
120V CA, 60Hz
● Carrying Bag x 1
●
Caja para el
transporte x 1
● Analog Cable x 1
●
Cable analógico x 1
● Optical Digital Cable
x 1
●
Cable óptico digital
x 1
● AC Adaptor x 1
●
Adaptador de CA x 1
● Headphones x 1
●
Auriculares x 1
● Remote Control Unit
x 1
●
Controlador remoto
x 1
● Rechargeable Nickel-
Metal Hydride Battery x 1
●
Batería recargable de
litio-ion x 1
1
2
3
● Battery Carrying Case
x 1
●
Caja portabaterías x 1
OUICK GUIDE (MD-MT20 ONLY)
– 8 –
MD-MT20/20C/20W
2
1
3
2
1
3
4
4
Recording /
Grabación
To turn off the power:
Para desconectar la alimentación:
To remove the MiniDisc:
Para extraer el minidisco:
Turn off the power and move the OPEN lever in the di-
rection indicated by the arrow.
Desconecte la alimentación y mueva la palanca OPEN en el
sentido indicado por la flecha.
Press the ENTER/SYNC button.
Pulse el botón ENTER/SYNC.
Begin playback on the source equipment.
Inicie la reproducción en el equipo fuente.
Press the REC button.
Pulse el botón
REC.
When a sound, such as a person speaking, is
picked up by the microphone, recording will be-
gin automatically.
Connect the stereo microphone to the MIC IN jack.
Insert a recordable MiniDisc.
Inserte un minidisco grabable.
■ Recording from CDs or MDs (Synchro recording)
■
Grabación de discos compactos o minidiscos (Grabación sincronizada)
■ Recording from the microphone (Mic synchro recording)
■
Grabación de un micrófono (Grabación sincronizada con micrófono)
Press the ENTER/SYNC button to select the syn-
chro recording level. (This level can be changed,
even while recording.)
Press the ■/:OFF button while in the stop mode.
Pulse el botón
■
/:OFF estando en el modo de parada.
Connect the external equipment.
Conecte el equipo externo.
1
Insert a recordable MiniDisc.
Inserte un minidisco grabable.
2
Press the REC button.
Pulse el botón REC.
3
4
5
6
1
2
3
4
5
6
Press the ■/:OFF button.
Pulse el botón
■
/:OFF.
To stop recording:
Para detener la grabación:
Mientras se produce el sonido del equipo externo
conectado a este aparato, pulse el botón o
para ajustar el nivel de grabación.
Conecte el micrófono estéreo al enchufe MIC IN del
aparato principal.
Pulse el botón o para ajustar el nivel
de grabación.
Press the or button to adjust the
recording level.
Pulse el botón ENTER/SYNC para seleccionar el
nivel de la grabación sincronizada. (Este nivel podrá
cambiarse incluso durante la grabación.)
Cuando el micrófono capte un ruido, el de una per-
sona que hable por ejemplo, la grabación empezará
automáticamente.
While playing sound from the external
equipment connected to this unit, press the
or button to adjust the recording
level.
5
Playing a MiniDisc /
Reproducción de un minidisco
2
1
3
4
Insert the headphones plug firmly into the
headphones jack on the remote control unit.
1
Plug the remote control unit into the jack on
the main unit. Push the plug all the way in.
2
● The power will be turned on automatically, and play-
back will start from the first track.
(Auto-play function)
●
La alimentación se conectará automáticamente, y la
reproducción empezará desde la primera pista.
(Función de reproducción automática)
To interrupt playback:
Para interrumpir la reproducción:
Press the button during playback.
● To resume playback, press the button again.
Pulse el botón
durante la reproducción.
●
Para reanudar la reproducción, pulse de nuevo el botón
To turn off the power:
Para desconectar la alimentación:
Press the button.
In the following cases, the auto-play function will not work.
● When the recordable MiniDisc write protection tab is closed
● When the auto-play function has been canceled
Playback does not start when a MiniDisc is inserted:
La
reproducción no empieza cuando se inserta un
minidisco:
6
Sound control /
Control del sonido
Adjust the bass level.
Each time the BASS button is pressed, the tone will be
switched as follows:
• Volume (0 - 30)
•
Volumen (0 - 30)
To stop playback:
Para detener la reproducción:
Press the ■/:OFF button.
Pulse el botón
■
/:OFF.
Press the ■/:OFF button while in the stop mode.
Pulse el botón
■ /
:OFF estando en el modo de parada.
3
Adjust the volume.
Press the + button to increase the volume and the –
button to decrease the volume.
Ajuste el volumen.
Pulse el botón + para aumentar el volumen y el botón –
para reducirlo.
BASS 1 ------- Bass sounds are emphasized slightly
.
BASS 2 ------- Bass sounds are emphasized more.
BASS 3 ------- Bass sounds are emphasized even more.
BASS OFF ----Bass emphasiz is canceled.
BASS 1 -------
Los sonidos graves se realzan ligeramente.
BASS 2 -------
Los sonidos graves se realzan más.
BASS 3 -------
Los sonidos graves se realzan aún más.
BASS OFF ----
El realce de los graves se cancela.
Inserte firmemente la clavija de los auriculares
en el enchufe de auriculares del controlador
remoto.
Enchufe el controlador remoto en el enchufe
del aparato principal. Empuje completamente
hacia adentro la clavija.
Pulse el botón
.
En los casos siguientes, la función de reproducción automática
no se activará.
●
Cuando esté cerrada la lengüeta de protección contra
escritura del minidisco grabable
●
Cuando haya sido cancelada la función de reproducción
automática
Ajuste el nivel de los graves.
Cada vez que pulse el botón BASS, el tono cambiará de la
forma siguiente:
Insert a MiniDisc.
Inserte un minidisco.
– 9 –
MD-MT20/20C/20W
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 restore the
initial location of wires.
Since the screws are small, incorrect fixing may result in
malfunction.
3. When repairing, pay utmost attention to static electricity
of IC.
STEP
REMOVAL
1 Bottom Cabinet 1. Screw .....................(A1) x7 10-1
2 Top Cabinet 1. Open the Top cabinet. 10-1
3 Key Switch/LCD 1. Flexible PWB......... (C1) x2 10-2
4 Mechanism Unit 1. Flexible PWB......... (D1) x2 10-2
5 Main PWB 1. Flat cable................(E1) x1 10-2
6 Audio PWB
PROCEDURE
2. Screw .....................(B1) x4
3. Screw .....................(B2) x1
2. Raise the rear part, and ..... 10-3
remove in the arrow direction.
2. Screw .....................(E2) x2
1.
Screw ......................(F1) x3 10-4
FIGURE
(A1)x2
ø1.4x2mm
Open Lever
ø1.4x2mm
(E2)x2
ø1.7x2.5mm
Main
PWB
(B1)x2
ø1.4x2mm
OpenOpen
(B2)x1
pull
pull
pull
LCD
Key Switch
Top Cabinet
(A1)x2
ø1.4x2mm
Bottom
Cabinet
Figu re 10-1
Put the fold on the connector, and
apply with the felt. Sagging may
result in contact with the sheet metal.
(D1)x1
pull
pull
pull
pull
pull
(A1)x1
ø1.4x2mm
(B1)x2
ø1.4x2mm
(A1)x2
ø1.4x2mm
Felt
(D1)x1*
Flexible PWB
for optical pickup
Audio
PWB
(F1)x3
ø1.7x2.5mm
(C2)x2
Mechanism
(E1)x1
Unit
LCD
Key Switch
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 10-2
Mechanism Unit
Audio PWB
Figure 10-4
Figure 10-3
– 10 –
REMOVING AND REINSTALLING THE MAIN PARTS
Remove the mechanism according to the disassembling methods 1 to 4. (See Page 10.)
How to remove the spindle motor (See Fig. 11-1.)
1. Remove the solder joint (A1) x 1 of flexible PWB.
2. Remove the screws (A2) x 3 pcs., and remove the spindle
motor.
How to remove the head up/down motor
(See Fig. 11-2.)
1. Remove the solder joints (B1) x 2 of head up/down motor
lead wire.
2. Remove the screw (B2) x 1 pc., and remove the flexible
PWB.
3. Remove the screw (B3) x 1 pc., and remove the head up/
down motor.
Note:
Take care so that the motor gear is not damaged.
(If the gear is damaged, noise is caused.)
(A2)x3
ø1.4x2.8mm
Spindle Motor
Remove the
solder joint
(B1)x2
Head Up/Down
Motor
MD-MT20/20C/20W
(A1)x1
Mechanism Flexible
PWB Solder joint
MD Mechanism
Figure 11-1
(B3)x1
ø1.4x5.5mm
(B2)x1
ø1.4x1.5mm
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., and remove the sled
motor.
3. Remove the solder joints (C4) x 2 of flexible PWB.
Note:
Take care so that the motor gear is not damaged.
(If the gear is damaged, noise is caused.)
How to remove the magnetic head (See Fig. 11-4.)
1. Remove the screws (D1) x4 which connects the magnetic
head to the head relay flexible PWB, remove the spring
washers (D2) x 2 and remove the soldering joints (D3) x 2.
Note:
Mount carefully so as not to damage the magnetic head.
(If the gear is damaged, noise is caused.)
How to reinstall the optical pickup unit
(See Fig. 11-5.)
1. Remove the screw (E1) x 1 pc.
2. Slowly raise the optical pickup.
(C1)x1
Stop Washer
(C2)x1
Drive Gear
Figure 11-2
Figure 11-3
(D1)x2
ø1.4x2.2mm
MD Mechanism
(C3)x2
ø1.4x1.2mm
Sled Motor
(C4)x2
Mechanism Flexible
PWB Solder Joint
MD Mechanism
(D2)x2
Spring Washer
Guide Shaft
Optical
Pickup Unit
Figure 11-5
(E1)x1
ø1.7x3mm
Thrust Plate Spring
MD Mechanism
– 11 –
Magnetic Head
(D1)x1
ø1.4x1.5mm
Figure 11-4
(D3)x2
Solder joint
(D1)x1
ø1.2x1.6mm
MD Mechanism
MD-MT20/20C/20W
ADJUSTMENT
Test disc
MD adjustment needs two types of disc, namely recording disc (low reflection disc) and playback-only disc (high
reflection disc).
Type
Test disc
Parts No.
1 High reflection disc MMD-110 (TEAC Test MD) 88GMMD-110
2 Low reflection disc MMD-212 (TEAC Test MD) 74-minute disc 88GMMD-212
3 Low reflection disc MMD-213A (TEAC Test MD) 80-minute disc 88GMMD-213A
4 Low reflection disc Recording minidisc UDSKM0001AFZZ
Note: Use the low reflection disc on which music has been recorded.
Entering the TEST mode
1. Setting at port (power nonconnected state)
(1) Set the port as follows.
TEST1 : "Low" (TP416)
TEST0 : "High"
(2) Turn the Power ON.
(3) Test Mode STOP [ T E S T _ ]
2. Setting by special button operation (in standby state)
(1) Holding down the DISP button and ENTER button, press the PLAY button.
(2) Normal mode setting initialization (BASS setting, VOL setting, etc.)
*Since the unit is changed to the setting for production line inspection , be sure to set it to the default setting state in the following default
setting procedure before returning it to the user.
(3) Indication of microcomputer version for one second [ 3 1 8 A f X ]
Destination
Microcomputer version
(4) Whole LCD lighting for 2 seconds
(5) Test Mode STOP [ T E S T _ ]
*When the PLAY button is pressed during indication (3) and (4), the process proceeds to (5).
EEPROM version
Leaving the TEST mode
(1) Press the STOP button in the TEST mode stop state or version indicating state or whole LCD lighting state.
Shipping setting method
Holding down simultaneously the VOLUME-DOWN Button and PLAY Button of the set unit without disc, supply the power from the DC IN plug.
After the indication "INIT" -> "BYE OK" disappears, release the power supply of DC IN.
Test Mode
1. AUTO 1 Mode • Perform preliminary automatic adjustment.
2. AUTO 2 Mode
3. TEST-PLAY Mode
4. TEST-REC Mode
5. MANUAL 1 Mode
6. MANUAL 2 Mode
• If the combination of mechanism and pickup
PWB has been changed, be sure to start from
AUTO1.
• Perform ATT (attenuator) automatic adjustment.
• Perform continuous playback (error rate display,
jump test)
• Continuous playback from the specified address
is performed.
• 1 line, 10 lines or 384 lines manual jump is
performed.
• C1 error rate display (pit section), ADIP error
rate display (groove section)
• The temperature correction is performed only when
servo start is performed, but the posture correction
is not performed during continuous playback.
• Continuous record from the specified address
is performed.
• Change of record laser output(servo gain is also
changed according to laser output).
• The temperature correction is performed only
when servo start is performed, but the posture
correction is not performed during continuous
recording.
• Temperature is displayed. (Updating in real time)
• Seeing the displayed adjustment value, perform
preliminary manual adjustment.
(Error rate indication, jump test)
• Temperature is displayed. (Updating in real time)
• Seeing the displayed adjustment value perform
manfully the preliminary adjustment.
(Error rate indication, jump test)
• Continuous playback is performed
(error rate display, jump test).
7. RESULT 1 Mode
8. RESULT 2 Mode
9. DIGITAL INPUT Mode
10. ERROR INFORMATION
Mode • Error information is initialized
11. NORMAL Mode
12. EEPROM Mode
13. INNER Mode
• The value adjusted in AUTO1 or MANUAL1 is
indicated.
• (Execution in servo "OFF" state").
• The value adjusted in AUTO 2 or MANUAL 2 is
indicated.
• Adjustment value is changed manually.
(error rate display, jump test).
• Digital input information is displayed.
• Error information is displayed.
• The mode is changed from the TEST mode to
the normal mode without adjustment.
• In the normal mode the internal operation mode,
memory capacity, etc. areindicated.
• In the normal mode both temperature correction
and posture correction are perfomed.
• Factors of digital servo are changed manually.
(Each servo is turned on individually.)
• Cut-off frequency of BASS1, BASS2 and BASS3
is selected manually.
• Temperature detection terminal voltage is
measured, and the reference value is set.
• Defaults are selected and set.
• Setting of EEPROM protect area is updated.
(In case of protect releasing)
• Determine the position where the INNER switch
is turned on. (only high reflection disc).
• The temperature correction is performed only
when servo start is performed, but the posture
correction is not performed.
– 12 –
MD-MT20/20C/20W
Operation in each TEST mode
1. AUTO1 Mode
• When the STOP button is pressed while the AUTO1 menu appears or during automatic adjustment, the mode changes to the TEST mode
stop state. At this time the adjustment value is not output.
• Be sure to adjust, using the specified disc MMD-213A or MMD-212.
At this time release the EEPROM (IC402) protection. (Refer to EEPROM write procedure.)
• Adjustment NG; Adjustment item out of range, focus ON failure, and adjustment error
• When the PLAY button is pressed while ADJ. OK is displayed, AUTO2 is executed.
2. AUTO2 Mode
• When the STOP button is pressed while the AUTO2 menu appears or during automatic adjustment, the mode changes to the TEST mode
stop state. At this time the adjustment value is not output.
• Adjustment NG; Adjustment item out of range, and adjustment error.
• When the PLAY button is pressed while ADJ. OK is displayed,TEST_PLAY is executed.
3. TEST-PLAY Mode
• When the STOP button is pressed while the TEST-PLAY menu appears, or in TEST-PLAY or continuous playback mode, the mode
changes to the TEST mode stop state.
• When the PLAY button is pressed while the TEST-PLAY menu appears,continuous playback is initiated from the current pickup position.
• Whenever the DISP button is pressed in the TEST-PLAY menu, the target address changes as follows.
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
SKIP UP/DOWN button is changed as follows.
• When the SKIP UP 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 SKIP DOWN 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 SKIP UP/DOWN 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.
* After the number of jump lines is indicated for one second, the address indication is restored. [ T R _ ]
• When the SKIP UP button is pressed in the continuous playback mode, the specified number of lines is jumped in the FWD direction.
• When the SKIP DOWN button is pressed in the continuous playback mode, the specified number of lines is jumped in the REV direction.
* When the SKIP UP/DOWN 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
* Recordabl disk
0032 — 03C0 — 0700 — 08A0 — 0950— 0032 —
0032 — 0032 — 0032 — 0032 —
1 — 10 — 384 — 1
Continuous playback (SUBQ address indication) [ S Q ]
|
Continuous playback (C1 error indication) [ C E ]
|
Continuous playback (SUBQ address indication) [ S Q ]
Continuous playback (ADIP address indication) [ A P ]
|
Continuous playback (C1 error indication) [ C E ]
|
Continuous playback (ADIP error indication) [ A E ]
|
Continuous playback (ADIP address indication) [ A P ]
4. TEST-REC Mode
• When the STOP button is pressed while the TEST-REC menu appears, or in the TEST-REC mode or continuous record mode, the mode
changes to the TEST mode stop state.
• When the PLAY button is pressed while the TEST-REC menu appears, the continuous record is initiated from the current pickup position.
• Whenever the 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 SKIP UP/
DOWN button changes as follows.
0032 — 0032 — 0032 — 0320 —
• When the SKIP UP button s pressed in the TEST-REC mode target address is displayed, the digit of address specified by the BASS button
is set to +1h.(0 to F)
• When the SKIP DOWN button is pressed in the TEST-REC mode target address is displayed, the digit of address specified by the BASS
button is set to -1h. (0 to F)
* When the SKIP UP/DOWN button is held down, the setting changes continuously, one cycle being 100 ms.
– 13 –
MD-MT20/20C/20W
5. NORMAL Mode
• When the STOP button is pressed while the NORMAL menu appears, the mode changes to the TEST mode stop state.
• Indication during operation
Indication of memory capacity on main unit LCD [ ] + Level meter
: Internal mode
: Address (Cluster section)
• Selection of sound volume, BASS, etc. is possible (without indication)
• Recording is also possible.
• If the STOP button is pressed during operation in the NORMAL mode, the NORMAL mode is canceled, and the power is turned off.
6. Error data display Mode
• Reversing when SKIP DOWN button is pressed
• When the STOP button is pressed while the error data indication menu appears or during error data indication, the mode changes to the
TEST mode stop state.
• Error data 0 is the latest error.
• Error which occurred in the TEST mode is also stored in the memory.
• When the DISP button is pressed while the error data indication menu appears, the error data is initialized. [ C L E A R _ ]
: Error Code
•
Explanation of error history code
12h : RF side FG, TG, and TCRS adjustment termination failure
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
24h : Disc linear speed measurement failure
32h : P-TOC read failure
42h : U-TOC read failure
44h : U-TOC write data write disabled/read check error
52h : SD write data write disabled
71h : Pickup position initialization time-over
72h : EEPROM data read check sum error
73h : Record head drive disabled (by EJECT lever)
82h : Power overvoltage detection
91h : Ambient temperature is higher that the allowable tempera-
ture.
: Address (Sector section)
7. INNER Mode
• when the STOP button is pressed on the INNER menu (SQ______ ), the state is changed to the TEST mode STOP state.
• : Address
– 14 –
MD-MT20/20C/20W
EEPROM (IC402) writing procedure
1. Procedure to replace EEPROM and write initial value of microcomputer in EEPROM
(1) Replace EEPROM.
(2) Deprive EEPROM of protection (connect the pins 8 and 6 of IC402).
(3) Refer to the latest EEPROM data list.
(4) Press the Display button, Ente button and Play button to start the test mode.
(5) Version display
[ V e r . ]
(6) The whole LCD lights.
(7) Test mode stop state.
[ T E S T ]
(8) Press the "BASS" button, and press twice the "SKIP DOWN" button.
[ E E P R O M ]
(9) 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 VOL UP or VOL DOWN key.
(10)
Set the temperature reference. (Refer to the Temperature Reference Setting Method.)
(11)
Set according to the EEPROM DATA LIST.
(12)
Press the Stop button.
[ T E S T ]
(13)
Press the Stop button.
(14)
After data is written in EEPROM, turn off power .
(15)
Restore protection of EEPROM (Disconnect connection made in Step (2) above).
X
EEPROM version (f ~ Z)
Microcomputer ROM version
2. Temperature reference setting method
[1] Measurement, calculation and setting procedure
(1) Set the TEST mode.
• Set TEST 1, 0 = '01', and turn on power (or set PLAY ON in standby state).
(2) Start the EEPROM mode 'Temp' menu.
• Key operation in order of BASS, SKIP-DOWN x 2 times, PLAY, PLAY in the test mode STOP state.
• 'TM$$%%' is displayed. ($$= Temperature code, %% = Temperature reference)
(3) Once press SKIP-UP, and determine the displayed microcomputer TEMP input AD value.
• 'TPin##' is displayed. (## = TEMP input AD value)
(4) At the ambient temperature, determine the temperature corrected value from the temperature measurement value
correction table.
(5) Determine the temperature reference, using the following formula.
• Temperature reference = Microcomputer TEMP input AD value + Temperature corrected value
(6) Set the temperature reference value by button operation , and check whether the temperature code indication corresponds to "Temperature
Code Identification Table".
[2] Temperature measurement value correction table
Ambient
temperature
+ 9oC ~ +11oC - 05h + 10.0oC
+12oC ~ +14oC - 04h + 12.7oC
+15oC ~ +16oC - 03h + 15.4oC
+17oC ~ +19oC - 02h + 18.2oC
+20oC ~ +22oC - 01h + 20.9oC
+23oC ~ +24oC ± 00h + 23.6oC
+25oC ~ +27oC + 01h + 26.3oC
+28oC ~ +30oC + 02h + 29.0oC
+31oC ~ +33oC + 03h + 31.8oC
Temperature
correction
Center
temperature
Ambient
temperature
- 9oC ~ +10oC 08h + 0.5oC
+ 3oC ~ +21oC 07h + 12.5oC
+15oC ~ +33oC 06h + 23.6oC
+26oC ~ +43oC 05h + 35.0oC
Temperature
correction
Center
temperature
– 15 –
MD-MT20/20C/20W
EEPROM DATA LIST (EEPROM version f)
TEMP setting
Item display Set values
T M _ _ Calculate values
Fucus setting
Item display Set values
F G _ _ B 0 H
F F 1 _ 7 0 H
F F 2 _ E 8 H
F Z H _ E D H
F L n _ 0 A H
D J G _ 1 4 H
F L V _ 3 3 H
W T f _ 2 0 H
F S S _ E 9 H
Tracking setting
Item display Set values
T G _ _ 4 8 H
T F 1 _ 7 0 H
T F 2 _ E 0 H
T F S _ 0 0 H
T B o _ 4 4 H
T B t _ 2 0 H
T K o _ 4 4 H
T K t _ 1 D H
T D o _ 6 7 H
T D t _ 3 4 H
T G R _ 0 0 H
S C t _ 4 0 H
S C m _ 5 3 H
C L p _ 1 8 H
C L r _ 2 8 H
J P I _ 0 1 H
K 1 0 _ 6 5 H
Spindle setting
Item display Set values
S P G _ 1 4 H
S P i _ E 0 H
S P m _ A 0 H
S P o _ 6 8 H
S P 1 _ 1 0 H
S P 2 _ 6 0 H
S P 3 _ F 2 H
S P 4 _ F 2 H
S P 5 _ 1 0 H
S P D _ 7 F H
S P K _ E B H
BASS setting
Item display Set values
B S 1 _ 3 F H
B S 2 _ 1 F H
B S 3 _ E 2 H
Sled setting
Item display Set values
S L G _ D F H
S L 2 _ 2 0 H
S L M _ 7 F H
S L V _ D 7 H
S K k _ 7 2 H
S K t _ 7 0 H
S K m _ 7 8 H
W T m _ 2 4 H
M V 1 _ 4 F H
M V 2 _ A A H
S R V _ 0 A H
ADJ. SET setting
Item display Set values
C O K _ A 0 H
F A T _ C 0 H
T A T _ 3 E H
C A T _ 2 0 H
F A B _ E 0 H
EQ. SET setting
Item display Set values
H Q 1 _ 9 0 H
H Q 2 _ 9 0 H
H S G _ 1 1 H
H S O _ F D H
L Q 1 _ 9 0 H
L Q 2 _ 9 0 H
L S G _ 1 1 H
L S O _ 0 0 H
G Q 1 _ 9 8 H
G Q 2 _ 8 4 H
G S G _ 1 1 H
F L p _ 0 8 H
Control setting
Item display Set values
C T 0 _ 0 5 H
C T 1 _ 1 1 H
C T 2 _ 7 F H
C T 3 _ 3 0 H
R C 0 _ C 0 H
R C 1 _ F E H
S Y C _ A 6 H
P W L _ 0 3 H
D R 1 _ 9 2 H
D R 2 _ C 8 H
I N 1 _ D 3 H
I N 2 _ 6 4 H
I N 3 _ D 2 H
I N H _ 6 4 H
D R H _ C 8 H
P L E _ 1 B H
R C E _ 4 2 H
E L T _ 7 6 H
S L T _ 4 3 H
S P M _ 0 0 H
M S L _ 0 0 H
U S 0 _ 0 0 H
U S 1 _ 0 0 H
U S 2 _ 0 0 H
– 16 –
MD-MT20/20C/20W
: Test Mode STOP
: Pre-auto adjustment menu
: ATT auto adjustment menu
: Continuous record menu
: EEPROM setting menu
: INNER switch position measurement menu
BASS
T E S T
Slide external
periphery move
Slide internal
periphery move
Tset Mode Menu
Test Mode Change Chart
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
SKIP UP SKIP DOWN
: Continuous playback menu
T P L A Y
SKIP UP SKIP DOWN
SKIP UP SKIP DOWN
SKIP UP SKIP DOWN
: Digital input signal monitor menu
D i n M o n
SKIP UP SKIP DOWN
E E P R O M
SKIP UP SKIP DOWN
I N N E R
SKIP UP
SKIP UP
SKIP DOWN
SKIP DOWN
SKIP UP
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [PLAY] button operation is performed in the specific menu, the operation of this
menu is executed.
: Pre-adjustment value check menu
R S L T 1
: ATT adjustment value check menu
R S L T 2
: Pre-manual adjustment menu
M A N U 1
: ATT manual adjustment menu
M A N U 2
: Error history display menu
E D A T A
: Test mode normal playback menu
N O R M A L
: Preautomatic Adjustment menu
: Preadjustment error (adjustment value output)
: During preadjustment adjustment
Adjustment error
Normal end
: Preadjustment normal end (adjustment value output)
: During ATT automatic adjustment
PLAY
PLAY
A U T O 1
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.
* " " represent the adjustment number as follows.
0 0 : Innermost periphery move
0 2 : ABEF offset tentative measurement
0 4 : RF side focus gain coarse adjustment
0 5 : Focus ATT tentative setting
0 6 : RF side bit section tracking gain adjustment
0 7 : COUT level setting for pit section adjustment
0 8 : External periphery move
0 9 : RF side groove section tracking gain adjustment
1 0 : COUT level setting for groove section adjustment
1 1 : RF side TCRS gain adjustment
1 2 : Tracking ATT initial setting
1 3 : RF side focus gain minor adjustment
1 4 : Focus ATT initial setting
1 5 : S gain "High" ABEF offset measurement
1 6 : TCRS offset measurement
1 7 : S gain "Low" ABEF offset measurement
– 17 –
MD-MT20/20C/20W
: ATT Autoadjustment menu
: ATT adjustment error (adjustment value output)
: During ATT autoadjustment
Adjustment error
Normal end
: ATT adjustment normal end (adjustment value output)
: Continuous playback (high reflection)
: Continuous playback (low reflection)
PLAY
PLAY
A U T O 2
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.
* " " represent the adjustment number as follows.
0 0 : Innermost periphery move
0 3 : Pit section tracking ATT setting
0 4 : Pit section focus ATT setting
0 6 : External periphery move (low reflection only)
0 7 : TCRS ATT setting (low reflection only)
0 8 : Groove section tracking ATT setting (low reflection only)
0 9 : Groove section focus ATT setting (low reflection only)
: Continuous playback menu
: Continuous playback (pit section)
: Continuous playback (groove section)
# # # # : Address
: Continuous playback (pit section)
: Continuous playback (groove section)
# # # # : Address
PLAY
T P L A Y
Continuous Playback
S Q # # # #
A P # # # #
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* In the start address set state the start address changes as follows when the [DISP] button is pressed.
0 0 3 2
H
(initial value) 0 3 C 0
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 [BASS] button is pressed.
1st digit (initial value) 2nd digit 3rd digit
A d 0 0 3 2
A d 0 0 3 2
MODE
MODE
A d 0 0 3 2
MODE
* In the continuous playback state the number of jump lines changes as follows shown
the [BASS] button is pressed.
1 (initial value) 10 384
1 T R
1 0 T R
BASS
BASS
3 8 4 T R
BASS
• 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 [SKIP UP/DOWN] button is pressed
* When the [SKIP UP] 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 [SKIP DOWN] 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).
A d 1 9 5 0 H
0 9 5 0
H
– 18 –
MD-MT20/20C/20W
: Continuous record menu
PLAY
T R E C
Continuous Rrecord
A P # # # #
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* In the start address set state the start address changes as follows when the [DISP] button is pressed.
• Continuous record from the current pickup position
: Continuous record menu
: Start address setting
: Continuous record
# # # #: Address
: Continuous record
# # # #: Address
PLAY
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 [BASS] button is pressed.
A d 0 0 3 2
1st digit (initial value) 2nd digit 3rd digit
A d 0 0 3 2
MODE
A d 0 0 3 2
MODE
MODE
A d 1 9 5 0
: INNER switch position measurement menu
: Continuous playback (pit section)
# # # # : Address
PLAY
I N N E R
Inner Switch Position Measurement
S Q # # # #
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
: TEST mode normal playback menu
: Continuous playback
@@@@@@: Mode and address display
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.
* When the NORMAL mode is canceled, the power is turned off.
: Error history display menu
: Error history 0 display
§ § : Error code
: Error history 1 display
§ § : Error code
: Error history 2 display
§ § : Error code
: Error history 3 display
§ § : Error code
: Error history 4 display
§ § : Error code
: Error history 5 display
§ § : Error code
: Error history 6 display
§ § : Error code
: Error history 7 display
§ § : Error code
: Error history 8 display
§ § : Error code
: Error history 9 display
§ § : Error code
PLAY
E D A T A
Error History Display
E 0 § §
E 1 § §
: Error history display menu
: Error history clear
PLAY
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 display
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
– 19 –
MD-MT20/20C/20W
: 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 UP
SKIP DOWN
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [PLAY] button operation is performed in the specific state, the specific setting menu is set.
: BASS setting menu
PLAY
B a s s
BASS Setting
B S 1
B S 2
SKIP UP SKIP DOWN
B S 3
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".
* In the specific state the setting changes in the range of "00h to FFh" when the
[VOL UP/DOWN] button is pressed.
(The upper limit varies depending on the items)
* When the [MODE] button is pressed in each state, the set digit is changed.
: Focus setting menu
PLAY
F o c u s
Focus Setting
F G
F F 1
SKIP UP SKIP DOWN
F F 2
SKIP UP SKIP DOWN
F Z H
SKIP UP SKIP DOWN
F L n
SKIP UP SKIP DOWN
D J G
SKIP UP SKIP DOWN
SKIP UP SKIP DOWN
F L V
W T f
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".
* In specific state the setting changed in the range of "00h to FFh" when the [VOL UP/DOWN] button is pressed.
(The upper limit varies depending on the items)
* When the [MODE] button is pressed in each state, the set digit is changed.
F S S
SKIP UP SKIP DOWN
– 20 –
MD-MT20/20C/20W
: Spin setting menu
PLAY
S p i n
Spin Setting
S P G
S P i
SKIP UP SKIP DOWN
S P m
SKIP UP SKIP DOWN
S P o
SKIP UP SKIP DOWN
S P 1
SKIP UP SKIP DOWN
S P 2
SKIP UP SKIP DOWN
S P 3
SKIP UP SKIP DOWN
S P 4
SKIP UP SKIP DOWN
S P 5
SKIP UP SKIP DOWN
S P D
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".
* In specific state the setting changed in the range of "00h to FFh" when the
[VOL UP/DOWN] button is pressed.
(The upper limit varies depending on the items)
S P K
SKIP UP SKIP DOWN
* When the [MODE] button is pressed in each state, the set digit is changed.
: Tracking setting menu
PLAY
T r a c k
Tracking Setting
T G
T F 1
SKIP UP SKIP DOWN
T F 2
SKIP UP SKIP DOWN
T F S
SKIP UP SKIP DOWN
T B o
SKIP UP SKIP DOWN
T B t
SKIP UP SKIP DOWN
T K o
SKIP UP SKIP DOWN
T K t
SKIP UP SKIP DOWN
T D o
SKIP UP SKIP DOWN
T D t
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".
* In the specific state the setting changes in the range of "00h to FFh" when the [VOL UP/DOWN]
button is pressed. (The upper limit varies depending on the items)
T G R
SKIP UP SKIP DOWN
S C t
SKIP UP SKIP DOWN
S C m
SKIP UP SKIP DOWN
C L p
SKIP UP SKIP DOWN
C L r
SKIP UP SKIP DOWN
J P I
SKIP UP SKIP DOWN
K 1 0
SKIP UP SKIP DOWN
* When the [MODE] button is pressed in each state, the set digit is changed.
– 21 –
MD-MT20/20C/20W
: Slide setting menu
PLAY
S l e d
Sled Setting
S L G
S L 2
SKIP UP SKIP DOWN
S L M
SKIP UP SKIP DOWN
S L V
SKIP UP SKIP DOWN
S K k
SKIP UP SKIP DOWN
S K t
SKIP UP SKIP DOWN
S K m
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".
* In the specific state the setting changes in the range of "00h to FFh" when the
[VOL UP/DOWN] button is pressed.
(The upper limit varies depending on the items)
* When the [MODE] button is pressed in each state, the set digit is changed.
W T m
SKIP UP SKIP DOWN
M V 1
SKIP UP SKIP DOWN
M V 2
SKIP UP SKIP DOWN
S R V
SKIP UP SKIP DOWN
: Temp setting menu
: TEMP reference
: Reference
§ § : Temperature code
: TEMP A/D input value
: Measurement value
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".
* In the specific state the setting changes in the range of "00h to FFh" when the
[VOL UP/DOWN] button is pressed.
* When the [MODE] button is pressed in each state, the set digit is changed.
: Adjustment setting menu
PLAY
A D J S E T
Adjustment Setting
C O K
F A T
SKIP UP SKIP DOWN
T A T
SKIP UP SKIP DOWN
C A T
SKIP UP SKIP DOWN
F A B
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".
* 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 [VOL UP/DOWN]
button is pressed.
* When the [MODE] button is pressed in each state, the set digit is changed.
– 22 –
MD-MT20/20C/20W
: Digital EQ setting menu
PLAY
D E Q S E T
Digital EQ Setting
H Q 1
H Q 2
SKIP UP SKIP DOWN
H S G
SKIP UP SKIP DOWN
H S O
SKIP UP SKIP DOWN
L Q 1
SKIP UP SKIP DOWN
L Q 2
SKIP UP SKIP DOWN
L S G
SKIP UP SKIP DOWN
L S O
SKIP UP SKIP DOWN
G Q 1
SKIP UP SKIP DOWN
F L p
SKIP UP SKIP DOWN
G Q 2
SKIP UP SKIP DOWN
G S G
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".
* 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 [VOL UP/DOWN]
button is pressed.
* When the [MODE] button is pressed in each state, the set digit is changed.
: Control setting menu
PLAY
C T R L
Control Setting
C T 0
C T 1
SKIP UP SKIP DOWN
C T 2
SKIP UP SKIP DOWN
C T 3
SKIP UP SKIP DOWN
R C 0
SKIP UP SKIP DOWN
R C 1
SKIP UP SKIP DOWN
S Y C
SKIP UP SKIP DOWN
P W L
SKIP UP SKIP DOWN
D R 1
SKIP UP SKIP DOWN
D R 2
SKIP UP SKIP DOWN
I N 1
SKIP UP SKIP DOWN
I N 2
SKIP UP SKIP DOWN
I N 3
SKIP UP SKIP DOWN
I N H
SKIP UP SKIP DOWN
Continued to
the next page
SKIP UP SKIP DOWN
– 23 –
MD-MT20/20C/20W
Continued from
the preceding page
D R H
SKIP UP SKIP DOWN
P L E
SKIP UP SKIP DOWN
SKIP UP SKIP DOWN
SKIP UP SKIP DOWN
R C E
E L T
S L T
SKIP UP SKIP DOWN
S P M
SKIP UP SKIP DOWN
SKIP UP SKIP DOWN
SKIP UP SKIP DOWN
M S L
U S 0
SKIP UP SKIP DOWN
SKIP UP SKIP DOWN
U S 1
U S 2
* 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
[VOL UP/DOWN] button is pressed.
* When the [MODE] button is pressed in each state, the set digit is changed.
– 24 –
NOTES ON SCHEMA TIC DIAGRAM
MD-MT20/20C/20W
• Resistor:
To differentiate the units of resistors, such symbol as K and
M are used: the symbol K means 1000 ohm and the symbol
M means 1000 kohm and the resistor without any symbol is
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.
• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means micro-micro-farad and the unit of the
capacitor without such a symbol is microfarad. As to electrolytic capacitor, the expression “capacitance/withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
TOP VIEW
B
(G)
(3)
E
TOP
VIEW
C
(D)
(2)
(S)
1
2SA17457
2SC4213 B
RN1103
1SS361
• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chassis with no signal given.
• Parts marked with “ ” ( ) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.
REF. NO
SW401 EJECT OFF—ON
SW402 HOLD OFF—ON
SW403 DISC LID OPEN OFF—ON
SW902 DISC PROTECT OFF—ON
DESCRIPTION
POSITION
TOP VIEW
SB10015 C
TOP VIEW
1SS372
TOP VIEW
1SS360
TOP VIEW
SBE803
2SA1873 GR
Figure 25 TYPES OF TRANSISTOR AND DIODE
– 25 –
MD-MT20/20C/20W
VOLTAGE
IC101
PIN
VOLTAGE
NO.
0.72V
1
0.72V
2
3
0.72V
4
0.72V
1.24V
5
1.24V
6
0.71V
7
1.24V
8
1.24V
9
10
1.24V
11
1.24V
12
1.24V
13
2.5V
2.5V
14
15
0.18V
2.5V
16
17
2.5V
18
0V
19
0V
20
1.48V
21
2.35V
22
0V
23
0V
24
2.5V
1.24V
25
1.24V
26
1.24V
27
1.24V
28
1.24V
29
1V
30
1.24V
31
1.24V
32
1.24V
33
NC
34
1.25V
35
1.25V
36
37
0.17V
1.24V
38
1.24V
39
1.24V
40
1.24V
41
2.5V
42
0V
43
0V
44
1.24V
45
1.24V
46
1.24V
47
0V
48
IC202
PIN
VOLTAGE
NO.
1.28V
1
1.63V
2
2.57V
3
1.76V
4
1.44V
5
1.44V
6
0.6V
7
0.6V
8
0.6V
9
2.56V
10
0.6V
11
1V
12
1V
13
1V
14
1V
15
1.8V
16
1.9V
17
1.7V
18
1.7V
19
0V
20
IC354
PIN
VOLTAGE
NO.
–
1
–
2
0V
3
0V
4
0V
5
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PIN
NO.
1
2
3
4
5
6
7
8
IC201
VOLTAGE
0.88V
2.5V
1.27V
0V
1.25V
1.25V
1.25V
1.25V
1.25V
1.3V
2.2V
2V
0V
0V
0V
0V
1V
0V
0V
0V
0V
0V
0V
0V
0V
0.51V
0.51V
0.49V
1.44V
1.13V
2.56V
0.6V
1V
1V
0.8V
0.8V
0.8V
0V
2.13V
1.4V
1.56V
1.1V
1.75V
2.57V
1.74V
1.61V
0V
1.93V
1V
0.91V
IC351
VOLTAGE
0V
0V
4.42V
0V
0V
4.42V
0V
0.9V
4.42V
0V
0.9V
4.42V
0V
4.46V
IC353
VOLTAGE
2.74V
–
–
0V
0V
–
–
2.74V
PIN
VOLTAGE
NO.
51
1V 0V 0V
52
0V
53
0V
0V
54
0V
55
2V
56
0V
57
0V
58
0V
59
0V
60
0.14V
61
2V
62
0V
63
0.9V
64
0.9V
65
1.66V
66
1V
67
2V
68
0V
69
1V
70
1V
71
2V
72
0V
73
0V
74
0V
75
0V
76
0V
77
2V
78
0V
79
2V
80
1V
81
2V
82
0V
83
0V
84
1V
85
2V
86
2V
87
0V
88
2.36V
89
90
0.2V
91
1.65V
0V
92
0.1V
93
0.7V
94
95
1.35V
1.76V
96
0.32V
97
2.27V
98
2.36V
99
100
0.2V
IC901
PIN
VOLTAGE
NO.
0V
1
0V
2
0V
3
0V
4
0V
5
0V
6
–
7
2.44V
8
2V
9
0V
10
2.48V
11
0.67V
12
0V
13
2.35V
14
0V
15
2.5V
16
0V
17
0V
18
0V
19
0V
20
IC872
PIN
VOLTAGE
NO.
4.64V
1
4.64V
2
NC
3
0V
4
PIN
VOLTAGE
NO.
1
2
2.5V
0V
3
4
2.35V
NC
5
0.18V
6
0V
7
0.23V
8
0V
9
10
2.23V
2.12V
11
2.04V
12
2.25V
13
2.35V
14
0.18V
15
0V
16
0V
17
0V
18
2.35V
19
0.2V
20
2.35V
21
2.26V
22
0.14V
23
1.6V
24
0V
25
0.08V
26
1.6V
27
1.26V
28
1.7V
29
0.27V
30
0V
31
0V
32
2.1V
33
2.72V
34
2.72V
35
2.35V
36
0V
37
2.34V
38
0V
39
2.35V
40
0V
41
2.35V
42
2.35V
43
0V
44
0V
45
2.35V
46
0V
47
0V
48
0V
49
–
50
Preform the measurement on
the IC401 pin 37 in the TEST
mode with GND short-circuited.
(LCD is in "TEST" state.)
IC402
PIN
VOLTAGE
NO.
1
2
3
4
5
6
7
8
IC431
PIN
VOLTAGE
NO.
1
2
3
4
IC851
PIN
VOLTAGE
NO.
1
2
3
4
5
IC401
PIN
NO.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
2.34V
0V
–
–
0V
0V
0.26V
2.34V
2.34V
2.34V
NC
0V
NC
1.16V
0V
1.17V
2.33V
VOLTAGE
2.32V
2.34V
0V
2.32V
0V
2.34V
2.34V
0.3V
2.35V
2.35V
2.28V
2.35V
2.35V
2.35V
1.08V
1.13V
0V
2.34V
2.32V
2.34V
2.34V
2.1V
2.32V
2.32V
1.93V
2.34V
2.34V
0.82V
1.46V
1.33V
2.34V
2.34V
2.34V
0V
1.62V
0V
0V
2.32V
2.33V
2.33V
2.34V
1.7V
1.5V
0.12V
2.33V
2.33V
2.34V
0.18V
2.33V
IC501
PIN
VOLTAGE
NO.
2.5V 0V
1
2.5V
2
0V
3
0V
4
0V
5
0V
6
0V
7
0V
8
1V
9
1V
10
1V
11
0V
12
0V
13
2.5V
14
0V
15
0V
16
0V
17
0V
18
0V
19
0V
20
0V
21
0V
22
2.5V
23
2.5V
24
IC601
PIN
VOLTAGE
NO.
0V
1
1V
2
2.35V
3
0V
4
4.72V
5
0V
6
0V
7
0V
8
4.72V
9
4.72V
10
0V
11
0V
12
0V
13
4.72V
14
0V
15
0V
16
0V
17
0V
18
0V
19
0V
20
0V
21
0V
22
4.72V
23
0V
24
0V
25
0V
26
4.72V
27
4.72V
28
0V
29
0V
30
0V
31
4.72V
32
0V
33
0V
34
2.5V
35
9.67V
36
IC651
PIN
VOLTAGE
NO.
2.74V
1
NC
2
0V
3
0V
4
0V
5
0V
6
–
7
NC
8
–
9
NC
10
IC701
PIN
VOLTAGE
NO.
1
0V
2
0V
3
0V
4
0V
5
0V
6
0V
7
0V
8
0V
9
0V
10
0V
11
0V
12
0V
13
0V
14
0V
15
0V
16
–2.48V
17
0V
18
0V
19
2.72V
20
0.86V
21
0V
22
0V
23
0V
24
IC702
PIN
VOLTAGE
NO.
1
0V
9.66V
2
2.34V
3
4
NC
4.46V
5
IC703
PIN
VOLTAGE
NO.
1
0V
2
0V
0V
3
4
0V
0V
5
0V
6
0V
7
0.97V
8
0V
9
10
0V
0V
11
0V
12
2.34V
13
0V
14
0V
15
0V
16
–2.87V
17
0V
18
0V
19
2.74V
20
0.85V
21
0V
22
0V
23
0V
24
IC771
PIN
VOLTAGE
NO.
0V
1
2.74V
2
2.74V
3
NC
4
2.5V
5
IC841
PIN
VOLTAGE
NO.
1
NC
4.49V
2
4.64V
3
0V
4
2.34V
5
IC801
PIN
VOLTAGE
NO.
0V
1
0.2V
2
0V
3
0V
4
0.73V
5
0.73V
6
IC802
PIN
VOLTAGE
NO.
5V
1
5V
2
0.7V
3
5V
4
5V
5
5V
6
IC805
PIN
VOLTAGE
NO.
1
2.15V
2
1.38V
3
–
4
–2.86V
5
0V
0V
6
–1.49V
7
2.73V
8
IC806
PIN
VOLTAGE
NO.
1
0V
2
0V
3
4.44V
4
0V
5
0V
0V
6
IC808
PIN
VOLTAGE
NO.
1
2.15V
2
0.56V
3
0.56V
4
0V
5
0.56V
2.74V
6
IC807
PIN
VOLTAGE
NO.
1
2V
2
1.98V
3
1.98V
4
0V
5
0V
0.94V
6
IC821
PIN
VOLTAGE
NO.
1.25V
1
0.94V
2
1.16V
3
1.15V
4
1.13V
5
0V
6
0.54V
7
4.49V
8
0V
9
0.41V
10
1V
11
1V
12
IC871
PIN
VOLTAGE
NO.
4.64V
1
4.48V
2
NC
3
0V
4
4.63V
5
– 26 –
J701
OPTICAL IN
UNIT
OPTICAL IN
+2.5V
J701
LINE IN
J702
MIC IN
(READY FOR
PLUG/IN
POWER)
2
3
L-CH
R-CH
RIPPLE
24 L-CH
22 R-CH
Q721
FILTER
+4.5V
5
IC702
HEADPHONES
4.5V
62GR4522
REGULATOR
J703
LINE
L-CH
2
19
R-CH
18
J703
REMOTE
CONTROL
J801
DC IN JACK
(4~5.5V)
IC802 FDC634P
IC801 HN1C01FU
OVER VOLTAGE
REVERSE CONNECTION
PROTECTION CIRCUIT
MD-MT20/20C/20W
Ni - MH Battery
or
Dry Battery
(2 pieces)
1.7~3.4V
2.8V
CHARGING CIRCUIT
IC803 FDT439N
IC805 NJM022V
IC806 NDC631N
IC807 RN4904
IC808 HN1C01FU
IC871
IC872
S8324A28
S80813LN
UP CONVERTER
+B
L-CH
1-9,
IC202
IX2567AF
10
4MBIT D-RAM
R-CH
11-19
6
5
IC701
IR3R54N
AUDIO AMP.
10
VCC VEE
20 17
57,66
26-29,
32-37,
31
+2.7V
IC703
IR3R54N
AUDIO AMP.
5
6
19
1,2,23,24,14
IC501
AK4519VF
AD/DA CONVERTER
12
15
74
73
IC201
39-46
LR37811
SERVO ATRAC
ENCODE/DECODE/
3
50
52,53
17
VCC VEE
20
3
+2.5V
5
IC771 62GR2522
2.5V REGULATOR
VDD
+2.0V
62
2
2.0V
82-84,86,
89-100
2
17-24
3
IC200
62FP2002
REGULATOR
AVCC
+2.5V
–2.7V
+2.7V
3
2.5V
IC820
62FP2502
REGULATOR
2
+7~+10V
SW401
EJECT
97
98
IC401
SYSTEM
1, 20-30, 73, 93-95
MICROCOMPUTER
92
55
SW403
52,
IX0298AW
4
3
IC821
7
+2.7V
DISC LID
OPEN
82 74
9,
11,
13,
42
69,
70,
83,
14-16
DC/DC
IR3M09N
+2.7V
84
1-3
3
8
VCC
Q873
CONVERTER
3
4
6-9
8
FETIC
2
NDS332P
LCD UNIT
F871
T0.5A L 63V
IC841
XC62HS02
2.35V REGULATOR
5
+2.35V
KEY OPERATION UNIT
1-12
IC651
DRIVER
LB1930M
VCC VS
1
HEAD UP/DOWN
7,9 3,4
M
+2.7V
M903
HEAD
+4.5V
IC353
FTD2005
HEAD DRIVER
MOTOR
UP/DOWN
14
1
IC354
CPH5608
HEAD DRIVER
3
8,11
VCC
1,13
VS
IC351
74ACT02T
HEAD DRIVER
4
HEAD
40
IC101
IR3R55
SIGNAL
13,14
24,42
PROCESSOR
1-2
+2.7V
+2.7V
+2.5V
T F
LASER
OPIC
PICK
Figure 27 BLOCK DIAGRAM
– 27 –
+2.5V
36
35
16
SW402
HOLD
19-22
2,15-17,
5,9,10,14
VM
6,8
IC601
MPC17A39
4CH PWM DRIVER
VCC VG
13
24,26
29,31
17
IC901
SPINDLE MOTOR
DRIVER
BA6966FV
1, 3, 4, 5,
6,19,20
M
NC
23,27,28,32
M901
SW902
DISC
MOTOR
SPINDLE
PROTECT
IC402
EEPROM
S29L294A
M
M902
SLED
RECORD SIGNAL
PLAYBACK SIGNAL
MOTOR
MD-MT20/20C/20W
R
E
8
T
Z
D
U
D
D
S
C
6
P29 P30
P28
MAIN PWB-A1
A
B
C
CN101
FLEXBLE
PWB
PLAYBACK SIGNAL
RECORD SIGNAL
VCCPU
TP108
TP111
TP110
TP109
TP103
TP102
TP106
TP101
TP105
5
4 3 2 1
8
6
9
10 11
7
8
4 3 2
6
5
1 9
7
A
B
10 11
RF2
VCC
COM
MP/R
DGND
CVCC
DGND
LDON
LDVAR
TP114
TP115
14 15 16 17 18 19
12
13
14 15 16 17 1819 20
12
13
RF4
RF3
VCC
AGND
TP116
F
TP117
E
TP118
RF1
+B
+B
TP119
T+
TP120
20 21
F-
IC101
RF SIGNAL
PROCESSOR
IR3R55
C102
1
C103
1
C104
0.027
R105
390K
C161
18
TP121
TP122
22
2
21 22
F+
T-
C112
0.033
C110
C111
0.22
0.0033
CK112
48
47 464544
ROUT
TTR
EFM
RF1
GOUT
1
2
3
4
5
TP144
6
7
8
9
10
11
12
Q101
2SA17457
1
C165
0.033
FF+
T+
T-
RF2
RF3
RF4
REFI
REFO
RFADD
TCGI
AIN
BIN
EIN
FIN
R
and
SW
BIAS
13
AVCC
141516
R161
1.2K
DIFF
DIFF
CK101
BIAS
STBY
R154
1.2K
AGC
EFMAGI
DISC
CK102
17
CK103
C107
C109
0.012
1
43 42 41 393837
40
4
AVCC
EFMI
AGND
EFMO
EFMAGC
ADIP
AGC
LPF HPF
LOGIC
SGAIN
AGND
DGND
DTEMP
LATCH
22
18
19
20
21
TP145
CK104
C130
0.1
RF2-1
CLOCK
AUSCLK
RFLAT
TEMP
LDON
LDVAR
OPICGA
ADAG
DATA
23
TP151
AUDATA
ADAGC
ADIPI
ADIPO
ADLPFO
TCGO
24
CK106
22KO
22KI
WBO
AOUT
BOUT
EOUT
FOUT
DVCC
C106
0.22
36
35
34
33
32
31
CK108
30
CK107
29
TP133
28
TP132
27
TP131
26
TP130
25
TP100
VCCLASER
+B
L171
10µH
C171
R106
56K
R102
22K
R101
22K
+B
100/6.3
TP139
C121
270P
(CH)
C122
270P
(CH)
C123
390P
C124
390P
TP187
R103
22K
CK105
R104
22K
C209
22P(CH)
L201
L209
100mA
1
16
C204
0.47
11
TP208
FEMON
TP209
TOTMON
76
TP210
77
CK204
CK201
CK202
CK203
CK206
CK205
R204
1K
C203
0.1
TEMON
SBCK
78
SBO
79
SBSY
80
SFSY
81
82
FOK
SENSE
83
84
COUT
85
MCCK
DINTX
86
87
VDD1
88
DGND
89
RSTX
90
SYSD0
91
SYSD1
92
SYSD2
93
SYSD3
94
SYSD4
95
SYSD5
96
SYSD6
SYSD7
97
SYWRX
98
99
1
00
AVCC
SYRS
EFMMON
TP201
9
VCCRF
10
17
4
FOK
SENSE
CIN
3
DINT
XRT
SYD0
SYD1
SYD2
SYD3
SYD4
SYD5
SYD6
SYD7
SYWR
SYRD
SYRS
+B
TP202
100mA
L204
100mA
L202
R207
680
DADATA
ADDATA
71 72 73 74 75
70
VDD3
DGND
LRCK
BCLK
DFCK
ENCODE/
DECODE/SERVO
SYRDX
99
BIN
EIN
AIN
AGND
TCG
EFMI
7
5
9
8
4 3 2 1
6
C207
0.1
L203
100mA
C211
5P(CH)
100mA
R222
1M
TP204
XL201
CK207
33.868MHz
66 67 68 69
65
X1I
DIN
X1O
VDD1
DGND
DOUT
IC201
ATRAC
LR37811
FIN
VDD1
DGND
TEST0
WBI
VBAT
11
14
12 13
10
TP206
C205
0.1
R206
270K
L100
10µH
C100
R205
330K
15
C212
61 62 63 64
10/6.3
VPD
TEST1
L205
5P(CH)
59 60
VXI
ADPON
X176KO
TEST2
16 17 18 19
TP207
X176KO
100mA
L206
DAPON
FODRF
FODRF
OPTCNT
FODRR
FODRR
100mA
55 56 57 58
TRDRF
20
21
TRDRF
54
EMPH1
TRDRR
22
TRDRR
LDCNT2
SLDRF
23
SLDRF
LDCNT2
52 53
X700KO
LDCNT1
ACRCER
RAWEX
RARASX
RACASX
RAOEX
RAA10
SPDRR
SPDRF
SLDRR
24
SLDRR
LDCNT1
EFMO
PLCK
TCRS
RAD0
RAD1
RAA9
RAD3
RAD2
DGND
RAA8
RAA7
RAA6
RAA5
RAA4
VDD2
RAA0
RAA1
RAA2
RAA3
SPDRF
51
25
SPDRR
TP212
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
VCCENDEC
C201
EFMO
CK224
TP203
CK222
1
12
+B
C200
1
D
E
F
G
OPTICAL PICKUP UNIT
IC351
HEAD DRIVER
74ACT02T
C357
0.1
IC354
CPH5608
4
3
5
S
G1
D1
1
IC353:IC354
HEAD DRIVER
4
G2
5
D2
C351
2
56P(CH)
15
TP665
L921
100mA
TP662
TP661
TP663
TP664
TP666
15
16
14
12 11
M902
SLED
MOTOR
SW902
M
13
16
DISC PROTECT
COM
W
U
V
-
M
+
FLEXIBLE
PWB
M901
SPINDLE
MOTOR
MECHANISM FLEXIBLE
PWB ASS'Y
IC351
GND
8
9
10
11
12
13
VCC
14
C354
0.1
C353
10/6.3
D351
SBE803
3
2
1
C361
0.039
IC353
R361
FTD2005
15
PDCNT
INNSW
TP655
TP660
TP659
TP658
TP657
TP656
7
10
5
9
8
6
HEAD
OPIC
7
6
5
4
3
2
1
7
5
8
6
D2S1G2
S2
D1
G1S2S1
4 3 2 1
R922
100K
R921
330
14
TP652
TP651
TP653
TP654
4 3 2 1
CN601
1
-
+
M
M903
HEAD UP/
DOWN
MOTOR
PH901
PHOTE
INTERRUPER
R351
Q901
RN1113
5.6
TP351
VCCHEAD
R903
330
C903
3.3
R920
100K
R905
100K
32
1
SPVM
SPINDLE MOTOR
DRIVER
BA6966FV
R909
10K
FG
11
BRK- CSL2
12
BRK+
13
R906
270K
STBY
14
RIB
15
VCC
16
VM
17
18
TP901
WOUT RF
19
VOUT
20
C911
0.1
R403
1K
R601
56K
SL-
SL+
13
TP601
C608
1
C610
C609
1
IC901
C902
0.01
IC901
+8
R404
1
GND
CSL1
CST
COM
WIN
VIN
UIN
UOUT
100K
+B
DCNT1
L609
4.7µH
L610
4.7µH
L608
4.7µH
SLDRR
SLDRF
SPDRF
R907
180K
R908
100K
C910
0.033
10
9
C909
0.033
8
C908
7
0.22
6
C905
5
0.0022
C906
4
0.0022
3
C907
2
0.0022
1
R901
1
R902
1
DISCPR
HEAD UP/DOWN
X176KO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
4CH PWM DRIVER
MPC17A39
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 25.
• The numbers 1 to 18 are waveform numbers shown in page 36.
1
23456
Figure 28 SCHEMATIC DIAGRAM (1/3)
R904
33K
LB1930M
AGND
CLK
PS
OE
VD1
FO1
PGND
RO1
VD1
VD2
RO2
PGND
FO2
VD2
RI1
FI1
FI2
RI2
IC601
SPIN
HDON
G
6
O2
7
8
O1
9
VCC
10
IC651
DRIVER
LG
GND
VD3
FO3
PGND
RO3
VD3
VD4
RO4
IC601
PGND
FO4
VD4
RI3
FI3
FI4
RI4
– 28 –
SYD2
25
SYD2
SYD3
SYD4
SYD5
SYD6
SYD7
VSS
RCLAT
_MCPGI
_INPGI
INPGCK
RCPCNT
TEST1
TEST0
JPNP
VCC
_LCDRST
PBLAT
LDON
OPICGA
RFLAT
RACLK
RADAT
VSS
_ELON
_REC
51
SYD1
52
HREC
SW402
HOLD
TP413
PCNT1
SYD0
SYWR
SYRD
SYRS
21 22 23 24
20
SYD0
SYD1
SYRS
PCNT1
_SYRD
_SYWR
MICROCOMPU
_DCEXT
_KHOLD
MD0
BUZOUT
PBOPON
55
53
54
56 5758 59 60
TP412
TP404
PBMUTE
BEEP
R407
10K
R413
1K
R414
1K
R415
1K
TP409
DSPSCK
14
15 16 17
18 19
VSS
EEPK
EEPD
_EPCS
PLVON
IC401
SYSTEM
IX0298AWZ
_RESET
MD2
WDTOVF
MD1
INNSW
61
62 63
INNSW
TP403
R408
100K
D431
1SS361
C431
0.47
R431
330K
TP407
TP408
R412
10K
DSPSTB
11
12 13
SCKO
DSPSCK
_STBY
_NMI
64 65
TP400
XL401
4.19MHz
R461
10
DSPSTB
VCC
66
100K
1
2
3
4
P32
XTAL
1
2
DSPDAT
9
67
IC
S
S
O
V
1
DSPDAT
EXTAL
+B
SYD3
SYD4
SYD5
SYD7
R422
100K
RCAULT
MCPGIN
INPGIN
INPGCK
RCPCNT
DSPRST
PBAULT
LDON
OPICGA
RFLAT
TP416
TP417
ELON
SYD6
AUSCLK
AUDATA
PLVGIN
+B
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
+B
EFMO
SPDRR
G
5
I2
4
I1
3
2
1
LDCNT1
LDCNT2
R600
56
C601
+B
T-
T+
F-
F+
C604
VCCPWM
1
C605
L600
TP610
2.2µH
0.1
C600
22/6.3
F-
C603
1
1
C602
1
TP602
VG
36
C651
35
VC
1
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
C622
0.1
FODRR
FODRF
TRDRF
TRDRR
L604
4.7µH
F+
L603
4.7µH
L602
4.7µH
TT+
L601
4.7µH
MD-MT20/20C/20W
10/6 3
9
(
1
V
U
S
2
3
0
S
N
3
8
O
T
P29 P30
P28
DADATA
ADDATA
PCNT2
IC820
DINT
DFCK
BCLK
LRCK
DIN
ADPON
DAPON
OPTCNT
EMPH1
1
3
2
DCNT1
RCPCNT
HREC
HSTOP
HPLAY
HKEY2
HKEY1
R451
5.6K
R452
8.2K
R453
18K
+B
DSPDAT
DSPSCK
DSPSTB
DSPRST
CN701
TP761
TP763
TP764
TP765
TP767
TP768
TP769
TP770
+B
TP771
TP774
RPLAY
ELON
EMPH0
RESET
PBMUTE
BEEP
RCAULT
AUSCLK
AUDATA
PBAULT
INPGCK
INPGIN
MCPGIN
RKEY
TP775
TP777
TP779
TP780
TP782
TP783
TP785
TP786
TP787
TP788
TP789
TP790
TP791
TP792
TP793
R465
100K
+B
+B
+B
RDATA
C869
R455
5.6K
47/6.3
VCC2.7X
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
R456
8.2K
C482
1
(243)
FLAT CABLE
33 33
1
1
Q461
2SC4738 GR
L862
100µH
C865
1
R457
18K
C481
1
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
D861
EP10LA03
L203
CH)
L209
L201
100mA
1
11
TP208
FEMON
09
TOTMON
76
10
TEMON
77
SBCK
78
01
SBO
79
02
SBSY
80
03
SFSY
81
4
82
FOK
05
SENSE
83
84
COUT
06
85
MCCK
DINTX
86
203
87
VDD1
.1
88
DGND
89
RSTX
04
90
SYSD0
SYSD1
91
92
SYSD2
93
SYSD3
94
SYSD4
95
SYSD5
96
SYSD6
SYSD7
97
SYWRX
98
99
1
00
SYRS
EFMMON
TP201
VCCRF
R422
100K
TP202
100mA
L204
100mA
R207
680
DADATA
ADDATA
71 72 73 74 75
70
VDD3
DGND
LRCK
BCLK
DFCK
DECODE/SERVO
SYRDX
99
AVCC
EFMI
BIN
EIN
AIN
AGND
TCG
7
5
9
8
4 3 2 1
6
C207
0.1
SYD7
RCAULT
MCPGIN
INPGIN
INPGCK
RCPCNT
TP416
TP417
DSPRST
PBAULT
LDON
OPICGA
RFLAT
ELON
100mA
C211
5P(CH)
L202
100mA
R222
1M
TP204
XL201
CK207
33.868MHz
66 67 68 69
65
X1I
DIN
X1O
DOUT
DGND
IC201
ENCODE/
ATRAC
LR37811
VDD1
DGND
WBI
VBAT
FIN
11
12 13
10
TP206
R206
270K
R205
330K
+B
SYD3
SYD4
SYD5
SYD6
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
PLVGIN
AUSCLK
AUDATA
14
C205
0.1
C100
C212
61 62 63 64
VDD1
TEST0
15
L100
10µH
10/6.3
SYD2
25
SYD2
SYD3
SYD4
SYD5
SYD6
SYD7
VSS
RCLAT
_MCPGI
_INPGI
INPGCK
RCPCNT
TEST1
TEST0
JPNP
VCC
_LCDRST
PBLAT
LDON
OPICGA
RFLAT
RACLK
RADAT
VSS
_ELON
_REC
51
5P(CH)
59 60
VXI
VPD
TEST2
TEST1
16 17 18 19
SYD1
SYD1
53
52
HREC
L205
ADPON
X176KO
TP207
X176KO
SYD0
SYD0
PBOPON
54
PBMUTE
100mA
DAPON
FODRF
FODRF
SYWR
21 22 23 24
_SYWR
_DCEXT
55
TP412
L206
SYRD
100mA
TP212
LDCNT1
LDCNT2
52 53
55 56 57 58
51
54
X700KO
50
EFMO
CK224
PLCK
49
EMPH1
LDCNT1
LDCNT2
48
ACRCER
TCRS
47
RAD0
46
RAD1
45
RAWEX
44
RARASX
43
RAA9
42
RAD3
41
RAD2
40
RACASX
39
DGND
38
RAOEX
37
RAA8
36
RAA7
35
RAA6
34
RAA5
33
RAA4
32
VDD2
31
RAA10
30
RAA0
29
RAA1
28
RAA2
27
RAA3
26
SPDRR
SPDRF
SLDRR
SLDRF
24
23
25
VCCENDEC
C201
1
SPDRR
SPDRF
SLDRR
TP407
R413
1K
R414
TP408
1K
R412
R415
1K
10K
TP409
DSPSTB
DSPSCK
14
11
12 13
15 16 17
VSS
EEPK
EEPD
SCKO
_EPCS
PLVON
DSPSCK
IC401
SYSTEM
IX0298AWZZ
_STBY
_NMI
MD2
WDTOVF
MD1
INNSW
_RESET
61
64 65
62 63
TP400
INNSW
TP403
XL401
4.19MHz
TP203
CK222
C200
1
10
DSPSTB
VCC
66
OPTCNT
TRDRR
TRDRF
FODRR
20
22
21
SLDRF
TRDRR
TRDRF
FODRR
TP413
PCNT1
SYRS
20
18 19
SYRS
PCNT1
_SYRD
MICROCOMPUTER
_KHOLD
MD0
BUZOUT
56 5758 59 60
TP404
BEEP
EFMO
TP205
IC200
12
2.0V REGULATOR
62FP2002
+B
1
2
R411
100K
IC402
CS VCC
1
5
SK
NC
2
6
3
7
PRTCT
4
8
GND DODI
DSPDAT
PDCNT
9
7
8
P32
VSS
RMDAT
PDCNT
DSPDAT
SPWDS
VSS
EXTAL
XTAL
_STOP
_PLAY
EMPH0
68 69 70
67
71 72 73 74 75
HSTOP
HPLAY
EMPH0
DISCPR
4 5 6
3
TP411
TP410
3
DISCPR
SPIN
2
PCNT2
CHGON
_EJSW
CKSTP
_XRST
SENSE
DCNT1M
NIHEXT
MCMON
BAT0FF
LDVAR
CHGCNT
HKEY2
HKEY1
PLVDCI
PLVBAT
_DINT
HDON
SPIN
_FOK
AVSS
RKEY
TEMP
AVCC
_ARQD
OPEN
IC402
EEPROM
S29L294A
CIN
1
CIN
1
00
99
VDD
98
97
96
95
94
93
92
91
90
89
VSS
88
87
86
85
84
83
82
81
80
79
Vref
78
77
76
_ARQK
_RPLAY
R426
22K
RPLAY
1
2
3
4
5
6
7
8
9
10
TP200
VCCDRAM
R202
+B
TP418
TP402
R462
100K
33
HDON
R405
10K
TP401
I/O1
I/O2
WE
RAS
A9
A0
A1
A2
A3
VCC
TP414
R425
RKEY
C202
47/6.3
VCC2.5
R406
100K
XRT
FOK
SENSE
TP415
22K
R423
IC202
C820
1
C401
0.1
HKEY2
HKEY1
PLVDCI
PLVDRY
22K
GND
20
I/O4
19
I/O3
18
CAS
17
OE
16
A8
15
IX2567AF
A7
14
4MBIT D-RAM
A6
13
A5
12
A4
11
2.5V REGULATOR
62FP2502
TP406
TP405
BATINCK
BATON
LDVAR
TEMP
R424
22K
CN702
TP077
TP076
TP070
9
8
7
6
5
4
TP064
3
2
1
TP061
AUDIO
PWB-A2
C863
1
R467
R460
R458
56K
68K
18K
TP093
TP092
TP091
TP090
TP089
TP088
TP087
TP086
TP085
TP084
TP083
TP082
TP075
TP074
TP073
TP072
TP071
TP070B
TP069
TP068
TP067
TP066
TP065
TP064B
TP063
TP062
TP451
TP452
TP453
TP454
TP455
TP456
TP457
TP458
TP459
TP460
TP461
TP462
TP463
CN451
TP481
TP482
TP483
TP486
TP487
TP488
TP489
CN482
TP080
TP079
TP078
EMPH0
RESET
PBMUTE
BEEP
RCAULT
AUSCLK
AUDATA
PBAULT
INPGCK
INPGIN
MCPGIN
RKEY
RPLAY
RDATA
ELON
EDIT
1
1
DISPLY
2
2
SKIP DOW
3
3
SKIP UP
4
4
REC
5
5
P-MODE
6
6
STOP
7
7
VOL DOWN
8
8
PLAY
9
9
BASS
11
11
12
13
14
VOL UP
12
ENTER
13
GND
14
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
TP088B
TP087B
TP086B
C505
1000P
C506
1000P
15
C507
+B
+B
+B
IC802: IC
OVER V
CONNEC
CIRCUIT
IC85
2.35
REG
C851
TC7
150P
R851
(CH)
1
10K
2
3
GND
R408
R407
10K
100K
C431
0.47
SW402
L600
2.2µH
HOLD
22/6.3
+B
7
IC431
D431
SESET
1SS361
S80820LN
OUT
VSS
4
1
R431
330K
VDD
2
3
R461
100K
R463
100K
8 9 10 11 12
RESET
D461
RB731U
4 3
2
C454
0.0022
R464
100K
5
1
6
R466
560K
PCNT2
BATON
BATINCK
Figure 29 SCHEMATIC DIAGRAM (2/3)
R803
100K
TP811
C831
0.1
R277
39K
C830
1000P
R823
100K
C825
R832
10M
IC808
PLVDRY
5
4 3
R279
1
6
100
5
2
4
3
PCNT1
C810
0.33
R811
180K
C834
0.1
R833
D831
1SS372
47
C877
1
C832
0.1
PLVDCI
IC808 CHARGING CIRCUIT
PCNT1
HN1C01FU
R810
180K
VCC4.5
+B
+B
VCC2.7
VCCVG
1
2
IC702
C866
1
IC702
4.5V REGULATOR
62GR4522
R821
4P(CH)
C821
100K
R826
10K
R828
220K
220/4
R829
33K
C822
56P(CH)
R827
C827
1
VREF
DB
2
3
EAIN+
EAIN-
4
EAOUT
5
6
GND
D821
300K
EC30LA02
22/6.3
L822
IC821
10µH
C826
1
IC82
CPH
O
PWM
G
– 29 –
MD-MT20/20C/20W
P28
P29
P30
TP451
TP452
TP453
TP454
R458
56K
TP455
TP456
TP457
TP458
TP459
TP460
TP461
TP462
TP463
TP481
TP482
TP483
TP486
TP487
TP488
TP489
CN451
CN482
11
12
13
14
C
OP
A
AY
Y2
Y1
R451
5.6K
R452
8.2K
R453
18K
+B
DSPDAT
DSPSCK
DSPSTB
DSPRST
R455
5.6K
R456
8.2K
C482
1
R457
18K
C481
1
B
CN701
TP761
TP763
TP764
TP765
TP767
TP768
TP769
RKEY
RPLAY
ELON
EMPH0
RESET
PBMUTE
BEEP
RCAULT
AUSCLK
AUDATA
PBAULT
INPGCK
INPGIN
MCPGIN
TP770
TP771
TP774
TP775
TP777
TP779
TP780
TP782
TP783
TP785
TP786
TP787
TP788
TP789
TP790
TP791
TP792
TP793
+B
C
(243)
CN702
FLAT CABLE
33 33
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
1
TP093
33
TP092
32
TP091
31
TP090
30
TP089
29
TP088
28
TP087
27
TP086
26
TP085
25
TP084
24
TP083
23
TP082
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1
TP070
TP064
TP077
TP076
TP061
TP075
TP074
TP073
TP072
TP071
TP070B
TP069
TP068
TP067
TP066
TP065
TP064B
TP063
TP062
RPLAY
RDATA
TP080
TP079
TP078
EMPH0
RESET
PBMUTE
BEEP
RCAULT
AUSCLK
AUDATA
PBAULT
INPGCK
INPGIN
MCPGIN
RKEY
D
ELON
AUDIO
PWB-A2
EDIT
1
1
DISPLY
2
2
SKIP DOWN
3
3
SKIP UP
4
4
REC
5
5
P-MODE
6
6
STOP
7
7
VOL DOWN
8
8
PLAY
9
9
BASS
11
VOL UP
12
ENTER
13
GND
14
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
KEY SWITCH
FLEXIBLE
PWB ASS'Y
6 7 8
TP088B
TP087B
TP086B
12
11
10
7
5
9
C505
1000P
8
4 3 2 1
C506
1000P
15
C507
+B
+B
+B
6
AINL
SCLK
LRCK
VCML
SDTO
MCLK
VCMR
PWDA
PWAD
IC501
CMODE
SDTI
VD
AOUTL
AOUTR
DEM0
DEM1
2.2
C762
4.7
R500
C508
C761
2.2
1
1
2
2.5V REGULATOR
C773
0.22
VCOM
62 GR2522
DGND
13 14 15 16 17 18 19 20 21 22 23
10/6.3
EMPH0
AINR
AGND
IC771
VRAD
VB
24
C500
10/6.3
5
4 3
E
IC802: IC802
OVER VOLTAGE REVERSE
C825
R821
4P(CH)
C821
100K
R826
10K
R828
220K
220/4
R851
10K
R829
33K
C822
56P(CH)
R827
300K
C827
C851
150P
(CH)
1
2
3
4
5
6
D821
EC30LA02
22/6.3
CONNECTION PROTECTION
CIRCUIT
IC851
VREF
DB
EAIN+
EAIN-
EAOUT
GND
L822
IC821
10µH
2.35V
REGULATOR
TC7S14FU
1
2
3
C826
1
IC822
CPH3403
GND
G
OSCIN
OSCOUT
STATE
PWM
D
3
ROSC
1
VCC
R852
47K
OSC
VCC
OUT
L821
4.7µH
S
5
4
12
11
10
9
8
7
C829
2
Q874
RN1113
C823
390P
VCC13
0.01
R853
100
C852
1
C824
560P
R824
15K
R831
100K
D822
1SS389
MICOM2.35V
VCCPOWER
C828
1
C806
3.3
IC821
DC/DC
CONVERTER
IR3M09N
R460
68K
Q461
2SC4738 GR
R465
100K
F
G
PCNT1
VCC4.5
C866
H
1
L862
100µH
C865
C869
47/6.3
VCC2.7X
PLVDCI
PLVDRY
IC808 CHARGING CIRCUIT
HN1C01FU
R810
180K
+B
VCC2.7
VCCVG
1
5
2
IC702
4 3
IC702
4.5V REGULATOR
62GR4522
1
R467
18K
C863
1
D861
1
EP10LA03
IC808
R279
1
6
100
R277
39K
5
2
4
3
PCNT1
C810
0.33
R811
D831
1SS372
C877
1
C832
0.1
180K
R833
47
C834
0.1
TP811
C831
0.1
R823
100K
R832
C830
1000P
10M
23456
• NOTES ON SCHEMATIC DIAGRAM can be found on page 25.
• The numbers 1 to 18 are waveform numbers shown in page 36.
LCD ASS'Y
LCD
LCD
DRIVER
SW401
1
EJECT
2
R717
1K
3
L-ch
R-ch
R715
100K
R716
100K
+B
MCPGIN
R729
2.7K
C721
3.3/10
C722
3.3/10
R765:R766
MD-MT20W
18
MD-MT20/20C
8.2
D494
15AZ7.5Y
KEY
PLAY
C752
0.082
C751
0.082
RKEY
RPLAY
DC JACK
1
2
3
SW801
VCC4
TP803
TP804
1
C714
R728
1K
C731
0.22
R492
J801
DC IN
2
1
1K
D492
15AZ7.5Y
3
C713
1
R714
10K
RIPPLE
FILTER
C452
1000P
C491
0.1
L454
100mA
4
C712
100P
(CH)
R727
8.2K
L-ch
R-ch
C720
1000P
C735
1000P
RDATA
C723
1000P
SW801
Ni-MH
BATTERY
DETECTION
BATTERY
TERMINAL
VRDA
C503
3.3/10
VA
TP500
C511
1
C774
1
L771
100µH
VCC2
C805
100/6.3
FET IC
Q873
NDS332P
D
S
G
IC841
2.35V REGULATOR
XC62HS02
4 3
5
C841
10/6.3
R501
470
C501
0.0022/50
C502
0.0022/50
C504
3.3/10
IC501
AD/DA
CONVERTER
AK4519VF
L500
47µH
C771
47/6.3
TP800
D801
SB10015C
C254
R878
100K
2
1
C875
C509
2.2
C510
2.2
R502
470
11
12
10
RIHP
LOUT
ROUT
14
13
15
R757
27K
R756
27K
ROUT
C760
0.027
C759
0.027
13 14 15 16 17 18 19 20 21 22 23
RESET
PBMUTE
RCAULT
BEEP
PBAULT
AUDATA
AUSCLK
R815
56K
R816
C801
0.1
24K
5
4
6
IC802
FDC634P
3 2 1
S
D
Q253
RN1113
G
2
3
1
R259
Q252
82K
2SC4738GR
R260
3.3M
R257
100K
R256
R258
180K
R261
270K
C253
0.1
R262
24K
7
8
6
0.1
V+
R270
100
O - +
0.1
TP809
C256
R274
R268
75K
2.2K
R267
75K
R265
R269
22K
100
R275
56K
D871
EP10LA03
1
VCC12
2
0.1
C874
15/10
2.8V UP CONVERTER
R720
8.2K
R719
8.2K
7
9
8
LIHP
AGND
DGND
VEE
16 17 18
R702
100
C702
10/6.3
R754
270K
C757
0.68
11 12
10
9
RIHP
LOUT
DGND
C754
1
C719
10/10
C753
L719
0.47uH
D802
015Z5.1Y
R800
22K
R801
2.2K
R802
1K
D812
SB10015C
IC803
FDT439N
CHARGING
CIRCUIT
TP808
Q254
RN1113
3
18K
R254
C258
2.2K
0.0047
R255
0.2M
5
+ - O
IC805
V-
C255
4 3 2 1
0.1
R271
1K
R266
100K
R264
18K
L871
47µH
VCC11
IC871
S8324A28
R712
5.6K
6
5
RI LI
VCC
20 21
19
R703
C701
10/6.3
R701
100
R762
4.3K
R761
4.3K
C756
0.68
8
7
LIHP
AGND
VEE
L752
22uH
1
VCC1
C800
1
R808
5.6K
R807
680
1
2
1
1
2
NJM022V
Q251
RN1113
2
3
5
4 3
R711
5.6K
C734
0.1
2
4 3
22 23
120K
C703
0.01
R769
C758
3.3/10
4
6
5
RI
LI
VCC
R753
120K
L751
22uH
R768
1K
R806
IC801
1
6
2
5
4 3
4
3 2
D803 1SS382
REVERSE
CONNECTION
VCC3
R273
56K
C250
0.1
D S S
6
D D
5
G
4 3
IC806
NDC631N
R263
100K
R276
1
3.3K
Q255
RN1113
2
F871
T0.5A L 63V
R871
10K
C876
1
C871
0.47
15K
C766
0.22
R710
56
C733
0.1
1
24
R770
IC701
AUDIO
AMP.
IR3R54N
15K
Q711
RN1444 A
3 2 1
IC703
AUDIO AMP.
IR3R54N
24
C755
0.01
R765
R-ch
C765
0.22
R766
R767
1K
R763
R764
68
68
L888
TIP IMPEDER
TP805
TP801
1K
TP802
R809
2.2K
D800
1SS360
L887
TIP IMPEDER
IC801
HN1C01FU
R804
1.0A
R278
2.2K
R252
150K
R253
75K
GND1
R250
1
R251
1
IC805,IC806,IC807
CHARGING CIRCUIT
1
6
2
5
3
4 3
IC807
1
RN4904
!
VSS
4
1
OUT
VDD
3 2
IC872
S80813LN
2.8V UP CONVERTER
INPGCK
INPGIN
R730
2.7K
L-ch
C715
0.1
R713
10K
L703
100mA
C711
100P
(CH)
R726
39K
R723
6.8K
L456
100mA
L452
100mA
L451
150mA
L702
100mA
R724
6.8K
L713
100mA
C724
1000P
C776
1000P
TP721B
SW403
DISC LID
OPEN
2
3
L704
100mA
2SC4213 B
C726
3.3/10
L714
100mA
L712
100mA
TP729
L453
100mA
Q721
L711
100mA
TP726
TP725
TP722
TP724
TP723
TP721
TP727
TP728
1
4
TP707
TP709
TP708
TP701
TP702
TP703
TP704
TP705
R725
100
C725
TP713
TP712
3.3/10
TP714
J701
OPTICAL/
LINE IN
7
VCC
9
Vout
8
GND
6
1
L
2
R
3
GND
4
5
J702
MICIN
4
2
3
1
TP711
J703
REMOTE CONTROL/
HEADPHONES
6
5
2
4
3
1
7
8
Figure 30 SCHEMATIC DIAGRAM (3/3)
– 30 –
MD-MT20/20C/20W
OPTICAL PICKUP
UNIT(13)
MAGNETIC HEAD FLEXIBLE PWB(18)
MAGNETIC
HEAD(24)
MECHANISM
FLEXIBLE PWB
M902
SLED MOTOR
M903
HEAD
UP/DOWN MOTOR
PH901
PHOTO
INTERRUPTER
M901
SPINDLE MOTOR
SW902
DISC
PROTECT
TO MAIN PWB
P32 5-H
CN601
TO MAIN PWB
P32 3-C
CN482
LCD Ass'y (214)
KEY SWITCH FLEXIBLE PWB Ass'y (213)
TO MAIN PWB
P32 2-C
CN451
CN101
TO MAIN PWB
P32 4-H
A
B
C
D
E
F
G
H
1
23456
Figure 31 WIRING OF P.W.BOARD (1/5)
– 31 –
MD-MT20/20C/20W
A
TO AUDIO PWB
CN702
P34 3-A
TP451
1
5
TP457
1
TP802
2
1
5
10
15
20
25
30
33
R456
R457
R455
R458
TP801
TP761
TP453
R424
R426
R425
TP459
TP790
TP793
33
FLAT CABLE
(243)
33
9
TP454
R453
R451
TP209
TP210
TP400
TP208
TP204
XL401
TP202
TP775
TP782
20 191817
TP792
1
TP212
To LCD Ass'y
P31 5-E
CN482
TP487
TP462
TP403
65
70
TP774
TP786
TP777
2345
R452
TP779
TP788
1
TP483
TP452
51
TP455
75
TP787
16
1
B
1
To Key Switch Flexible Ass'y
P31 2-E
13 1
L887
10
CN451
10
13
J801
L888
C800
3
TP763
CN701
TP789
C
TP456
TP458
TP805
R816
C801
TP764
TP460
TP461
R815
TP800
D
J801
DC IN
1
E
TP765
TP767
TP768
TP769
TP770
F
TP771
TP780
TP412
TP783
G
MAIN PWB-A1 (BOTTOM VIEW)
Terminal, Battery
(237) /
11
TP481
1
5
9
50
55
60
76
C401
TP791
C481
TP489
R422
TP785
45
80
TP203
IC202
TP205
TP488
TP401
TP417
40 35
85 90
TP809
TP145
151413 12
6
TP482
C482
TP463
TP486
C831
D831
R821
IC401
TP206
7
R829
89
C823
C824
10
12
IC821
156
C832
C830
R826
R828
R832
R827
TP416
TP410
30
95
TP405
TP808
R405
TP415
11
10
9
7
R823
26 25
20
15
10
5
100
TP200
C825
1
SW402
HOLD
C828
C822
R413
TP414
R406
TP404
C852
TP811
R811
TP413
R414
R415
R831R824
R810
TP408
TP406
R852
TP207
D822
C829
IC851
54
1
R412
TP409
IC402
5
TP418
3
R411
TP411
17
C851
8
CK107
C604
C810
14
TP402
TP652
R904
C907
C906
C909
TP407
R106
R851
R853
CK108
TP132
CK105
TP665
TP133
TP139
TP106
C603
C602
C601
TP201
TP130
TP131
25
36
TP100
L604
37
16
R277
TP651
R902
C905
C910
C908
CK106
24 20
30
35
31
46
L603
L602
L601
R901
TP151
CK104
IC101
C107
R279
TP663
R907
R908
C130
CK103
C106
Terminal, Battery
(235)
Terminal, Battery
(233)
14
IC808
TP610
TP187
1
20
5
15
IC901
10
11
R906
C161
Q101
CK101
CK102
13
15
12
10
5
1
4540
48
C112
CK112
C109
C110
C111
2
TP664
R922
R921
R905
R154
TP117
15
TP661
TP662
C903
TP144
TP666
TP656
TP601
C911
TP103
R276
TP660
TP657
R903
TP122
22
20
CN101
15
10
5
1
TP101
TP804
R265
TP901
R909
C902
TP803
R267
16
15
10
5
1
TP653
TP121
R804
R266
R264
64
1
IC807
TP602
L921
R269
C255
C256
R274
3
CN601
TP658
C357
TP120
1
IC805
4
R275
R260
TP654
1
IC351
5
7
TP110
R271
Q255
R261
R263
TP119
C254
R259
Q251
R252
R253
C250
TP655
TP116
TP111
TP109
TP108
TP102
TP105
14
10
TP659
8
8
5
C258
R255
R254
R262
C253
Q253
R278
Q254
R273
13
TP351
18
TP118
TP115
TP114
1
To Optical Pickup Unit
P31 1-D
: Through-hole where the top, bottom and +B patterns are connected.
: Through-hole where the top, bottom and hround patterns are connected.
H
: Through-hole where the top and bottom patterns are connected.
• The numbers 1 to 18 are waveform numbers shown in page 36.
1
23456
Figure 32 WIRING OF P.W.BOARD (2/5)
– 32 –
22
1
To Mechanism Flexible PWB
P31 6-D
16
R270
MD-MT20/20C/20W
MAIN PWB-A1 (TOP VIEW)
Q252
R256
G
D
S
Q901
R250
C609
C610
R258
SW801
1
2
3
R251
IC803
C608
R920
8
IC353
1
C353
R257
SW801
Ni-MH
BATTERY
DETECTION
6
IC806
5
4
D812
3
4
C104
C805
35
30
C806
IC822
1
20
56
R102
C820
2
IC820
C100
L100
G
S
IC651
R104
R103
R101
R206
1
3
R205
C124
L821
D
C826
C827
10
D
Q874
100
1
C207
C122
C121
C123
C205
R407
R803
R408
10
R404
Q873
5
15
20
25
R878
26
D821
G
R403
30
C863
S
L822
C821
C834
R833
L862
D861
C204
R204
C203
CK206
95
IC431
3
4
CK205
CK204
R431
CK202
CK203
C865
CK201
76808590
IC201
35
45 50
40
CK222
R268
C600
1
R361
D351
L608
C351
2
4
3
R351
R600
C651
C605
5
R601
IC354
4
5
12
1
10
15
18
3
C103
C622
36
IC601
25
19
L171
C171
R161
C165
R105
C102
L600
L609
L610
C361
5
5
4
C354
2
1
70
65
60
55
51
3
C869
C431
D431
R466
R465
75
R463
C201
CK224
1
2
IC200
C866
IC872
R461
CK207
F871
T0.5A L 63V
1
2
3
1
2
3
3
C871
L204
R222
C211
R423
C200
R202
R871
R207
4
L205
3
2
C874
1
IC871
IC702
2
1
D461
L203
L202
XL201
C202
5
5
4
C209
C876
Q461
L201
L206
C875
4
5
6
C212
C877
C454
L209
D871
3
IC841
445
D801
R464
L871
1
2
1
2
3
D800
D802
IC801
R462
D803
R800
R467
3
4
2
3
IC802
R801
2
1
5
6
C841
R460
6
5
4
R809
R807
R808
1
4
R802
R806
12
7
8 9 10 11 12
Figure 33 WIRING OF P.W.BOARD (3/5)
– 33 –
MD-MT20/20C/20W
AUDIO PWB-A2 (TOP VIEW)
A
FLAT
CABLE
(243)
TO MAIN PWB
CN701
P32 2-B
33
33
1
1
L752
L751
CN702
B
R756
R757
R710
24
15
13
C758
2530
R753
20
C719
R717
C715
Q711
33
C766
R764
C765
R763
C
C771
L771
R762
R761
R769
R770
R768
R767
R766
R765
1
5
IC703
10
12
C756
C757
D
C773
C774
4
IC771
5
E
L500
5
C500
C511
3
2
1
C762
24
C761
C508
R500
1520
L719
C507
13
IC501
C505
10
C504
F
G
R502
C502
C503
4
1
C510
C723
5
R501
C501
C509
3
2
12
C506
Q721
R726
C726
1
R712
R720
4
R725
C725
R711
R719
3
C759
C760
C711
C722
C755
R754
R730
9
8
7
R723
C752
2
1520
C754
C753
C491
L702
C721
C720
R724
1
L453
L454
C751
C712
3
2
R729
L713
L712
C724
C731
510
L703
R703
D494
C702
R727
L456
4
C703
1
R714
R728
R492
R702
C701
C714
L704
L714
R716
D492
6
5
J701
OPTICAL/
LINE IN
1
SW401
EJECT
8
7
6
SW403
DISC LID
OPEN
: Through-hole where the top, bottom and +B patterns are connected.
: Through-hole where the top, bottom and hround patterns are connected.
H
: Through-hole where the top and bottom patterns are connected.
• The numbers 1 to 18 are waveform numbers shown in page 36.
1
23456
Figure 34 WIRING OF P.W.BOARD (4/5)
– 34 –
C776
MD-MT20/20C/20W
AUDIO PWB-A2 (BOTTOM VIEW)
J703
REMOTE
CONTOL/
HEADPHONES
L452
TP721
TP721B
L451
1
TP705
2
TP729
R715
R713
TP701
R701
TP728
C713
5
6
8
7
TP727
TP722
3
TP725
TP726
TP062
TP061
TP704
C452
TP063
TP723
TP066
TP064
4
TP724
TP702
TP065
13
TP068
TP069
TP064B
TP703
15
20
TP067
IC701
TP070
TP071
TP077
TP080
TP072
10
5
TP070B
TP073
TP709
TP708
12
TP086
TP082
TP089
TP707
TP076
TP075
TP091
TP092
TP074
TP083
TP093
TP079
TP087
TP084
TP088B
TP085
TP090
TP088
TP500
L711
TP711
1
J702
MIC
IN
TP713
TP712
TP714
3
C735
7
8 9 10 11 12
24
2
C734
4
1
C733
TP086B
TP087B
TP078
Figure 35 WIRING OF P.W.BOARD (5/5)
– 35 –
MD-MT20/20C/20W
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
(EFM)
TP210
(TEOUT)
TP209
(TOTAL)
Stopped
CH1=1V
DC 10:1
CH3=500mV
DC 10:1 (2ms/div)
2ms/div
CH2=2V
DC 10:1
T
1
2
9
10
11
1994 / 12 / 16 01:23:16
=Filter=
=Tracel= P-P 1.280V
=Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.000V
CH2 : 0.00V
Main : 1K
Zoom : 1K
CH3 : 0.00V
CH4 : 0.00V
=Trigger=
Mode : AUTO
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM
T
TP201
(EFM)
Stopped
CH1=2V
DC 10:1 (500ms/div)
500ms/div
1
MORM:200MS/s
9
1994 / 12 / 15 08:39:46
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.00V
CH2 : 0.00V
Main : 10K
Zoom : 10K
CH3 : 0.00V
CH4 : 0.0V
=Trigger=
Mode : AUTO
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM
T
TP210
(TEOUT)
TP656
(SL+)
TP657
(SL-)
Stopped
CH1=2V
DC 10:1
CH3=2V
DC 10:1 (1s/div)
1s/div
CH2=2V
DC 10:1
1
3
2
NORM:1kS/s
10
14
15
CH2=500mV
DC 10:1
CH1 : 0.00V
CH2 : 0.000V
CH3 : 0.00V
CH4 : 0.00V
T
CH3=5V
DC 10:1
Main : 10K
Zoom : 10K
Stopped
CH1=1mV
DC 10:1
TP208
1
(FEOUT)
1
TP122
2
(F+)
2
3
CK205
3
(SENSE)
CK204
T
4
(FOK)
4
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
1994 / 12 / 15 22:54:19
CH4=2V
50ms/div
DC 10:1 (50ms/div)
NORM:200kS / s
=Trigger=
Mode : NORMAL
Type : EDGE CH4
Detay : 0.0ns
Hold OFF : MINIMUM
WAVEFORMS OF MD CIRCUIT
CH2=2V
DC 10:1
CH1 : 0.00V
CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V
T
CH3=2V
DC 10:1
Main : 5K
Zoom : 5K
1994 / 12 / 16 00:24:17
CH4=2V
50us/div
DC 10:1 (50us/div)
NORM:100MS / s
=Trigger=
Mode : AUTO
Type : EDGE CH3
Detay : 0.0ns
Hold OFF : MINIMUM
Stopped
CH1=2V
DC 10:1
SDTi
5
1
SCLK
6
2
T
LRCK
7
3
MCLK
8
4
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
10
11
16
CH2=2V
DC 10:1
T
1994 / 12 / 15 23:31:21
50ms/div
ENV
1
10
14
12
13
Stopped
CH1=2V
DC 10:1 (50ms/div)
T
SPDRR
1
TP601
2
(VM)
15
=Filter= =Offset= =Record Length=
Smoothiing : OFF
CH1 : 0.00V
BW : FULL
CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V
Stopped
CH1=2V
CH2=2V
DC 10:1 (2ms/div)
TP201
9
(EFM)
2
T
TP210
(TEOUT)
1
TP209
(TOTAL)
DC 10:1
T
Main : 10K
Zoom : 10K
CH3=500mV
DC 10:1
=Trigger=
Mode : NORMAL
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM
1994 / 12 / 15 08:57:26
2ms/div
ENV
1
10
12
13
=Filter= =Offset= =Record Length=
Smoothiing : OFF
CH1 : 0.00V
BW : FULL
CH2 : 0.00V
CH3 : 0.000V
CH4 : 0.0V
Stopped
CH1=500mV
DC 10:1 (20us/div)
CH2=2V
DC 10:1
Main : 10K
Zoom : 10K
=Trigger=
Mode : NORMAL
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM
1994 / 12 / 15 09:10:03
20us/div
ENV
9
T
CK105
(HPFO)
10
Stopped
CH1=2V
DC 10:1
TP208
(FEOUT)
1
T
TP210
(TEOUT)
2
TP656
3
(SL+)
TP657
4
(SL-)
BandwidthONSmooth
FULL 20MHz
=Filter= =Offset= =Record Length=
TP208
(FEOUT)
TP210
(TEOUT
SPDRR
TP601
(VM)
TP201
(EFM)
TP210
(TEOUT)
Smoothiing : OFF
BW : FULL
)
Smoothiing : OFF
BW : FULL
CH1 : 0.00V
CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V
Stopped
CH1=2V
DC 10:1
T
1
2
3
4
=Filter= =Offset= =Record Length=
CH1 : 0.00V
CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V
Stopped
CH1=2V
DC 10:1
1
T
2
CH2=2V
DC 10:1
CH2=2V
DC 10:1
CH2=2V
DC 10:1
T
1994 / 12 / 18 09:26:46
CH4=2V
DC 10:1 (1s/div)
=Trigger=
Mode : AUTO
Type : EDGE CH2
Detay : 0.0ns
Hold OFF : MINIMUM
1994 / 12 / 15 09:58:45
CH4=2V
DC 10:1 (1s/div)
=Trigger=
Mode : AUTO
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM
1994 / 12 / 15 21:54:52
CH4=1V
500us/div
DC 10:1 (500us/div)
1s/div
ENV
1s/div
ENV
ENV
CH3=2V
DC 10:1
OFF
Main : 10K
Zoom : 10K
CH3=2V
DC 10:1
Main : 10K
Zoom : 10K
CH3=1V
DC 10:1
1
CK108
17
(WBO)
2
18
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.000V
CH2 : 0.00V
CH3 : 0.000V
CH4 : 0.0V
Main : 4K
Zoom : 4K
=Trigger=
Mode : NORMAL
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM
For TP208, TP209, and TP210, use the specific LPF, and
observe the waveform.
10K
Measurement
TP
1000P
3
TP121
4
(T-)
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.00V
CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V
– 36 –
Main : 10K
Zoom : 10K
=Trigger=
Mode : NORMAL
Type : EDGE CH2
Detay : 0.0ns
Hold OFF : MINIMUM
When watching the EEM monitor (TP201)
Set MSL from 00H to 80H with EEPROM control setting. After
completion restore 00H.
MD-MT20/20C/20W
TROUBLE SHOOTING
It is advisable to use the TEST mode (refer to Error Data Display Mode, P19) indicating the causes of troubles before
starting repair. Causes of operation errors (up to 10 errors) are recorded as error codes. This information is useful
for repair.
When does not function
When the CD section does not operate When the objective lens of the optical pickup is dirty,this section may not operate.Clean
the objective lens,and check the playback operation.When this section does not operate even after the above step is taken,check
the following items.
Remove the cabinet and follow the troubleshooting instructions.
"Track skipping and/or no TOC(Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup lens.
Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."
Turn the power off.
Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.
Do not touch the lens with the bare hand.
Is the power supply turned on when the remote control
button or main unit button is pressed?
Yes
Does the display operate normally?
Yes
Is playback state set?
Yes
Is audio output normal?
Yes
Is recording/playback operation normal?
• Power is not turned on when the / button is
pressed.
Is power turned on when the remote control button is
pressed?
No
No
No
No
No
No
Perform the check stated in item "Power is not turned on
when the PLAY button is pressed".
Perform the check stated in item "Abnormal display".
Perform the check stated in item "Playback state connot be
set".
Perform the check stated in item "Audio playback circuit".
Perform the check stated in item "Recording/playback
operation".
Is operation normal when the main body button is pressed?
No
Is the pin 55 of IC401 in H state? (TP404)
Yes
Does the pin 66 of IC401 oscillate? (TP400)
Yes
No
No
– 37 –
Check the periphery of remote controller and main unit
headphone terminal (J703) and IC401.
Check the position of Hold switch.
Replace XL401.
MD-MT20/20C/20W
• Abnormal display
Is waveform output from CN482 pins 6 to 8?
Are the pin 4 (VCC) and pin 5 (GND) normal?
Yes
Check for pattern breakage of flexible PWB, check for
defects of display microcomputer (replace the display unit).
No
Is waveform output from IC401 pins 9,11,13?
Yes
Check between IC401 and
CN482.
• Playback state cannot be set
When it has been ascertained that the address up to cluster address is normal in the TEST mode.
Is initialization performed normally in case of high- reflection
disc playback?
No
Is the lead-in photointerrupter set to OFF when the optical
pickup moves to the innermost periphery in NORMAL mode?
(Is TP654 in H level?).
Yes
Yes
No
Does the playback time display advance?
Check IC201 and IC202 connection line.
Check the lead-in photointerrupter, mechanical flex
PWB soldering and CN601 connection.
No
Check the periphery of IC401.
No
Ia an attempt to repeat repeatedly the TOC part performed
on the low-reflection disc?
Yes
Position check in INNER mode
No
Replace the disc.
• Audio playback clrcult
Although the playback time display is acting., no sound is given during playback in the normal mode.
Is audio wavefrom output from IC501 pins 19 and 20?
Yes
Is audio wavefrom output from IC703 pins 18 and 19.
Yes
Is audio wavefrom output from J703 pins 3 and 4.
Yes
Check headphones jack,and periphery of headphone.
No
No
No
Check IC201 pins 70 to 72, pin 74 and IC501 pins 9, 10, 11,
15
Check the pins 5 and 6 of IC703.
Check whether there is defective solder joint of audio signal
line between IC703 and J703
– 38 –
• The spindle motor fails to run.Does the head move
MD-MT20/20C/20W
Does the waveform appear on the IC201 pins 24 and 25 after
TEST mode AUTO2 completion and in this state?
Yes
Does waveform appear on the IC601 pin 13?
Yes
Does waveform appear on IC901 pins 1, 19 and 20?
Yes
Replace the spindle motor.
No
No
No
Check the IC201 periphery.
Replace. IC601
L608, IC201, IC901, CN601 and flex, etc. soldering check
• Recording/playback operation
Insert a low reflection disc, and ascertain audio output by normal playback, and then set TEST REC mode.
Does the head move down, failing to start record even
when the continuous record mode is set after address?
No
Does the RF waveform of TP201 appear when playback is
No
Yes
Yes
Check voltage of pins 52 and 53 of IC201, pins 3, 4, 7, and 9 of
IC651, pins 1 and 2 of CN601. Check whether disc is recordinhibited.
Does level of pins 86 of IC401 and pin 17 of IC101 change
depending on record and playback?
Yes
Is RF pattern output from IC201 pin 50?
Yes
Check whether there is any damage in IC101, periphery of
laser diode.
Check for defects of IC351 in head drive flexible PWB,head,
flexible PWB.
Is audio monitor output given in normal mode LINE IN
record?
No
Is waveform obtained on IC501 pins 3 and 6?
No
Is audio waveform observed on the pins 18 and 19 of
IC703?
Yes
No
No
Yes
Yes
No
Check periphery of IC401 and IC101.
Check for soldering failure of IC201 .
Check waveforms of pins 9 to 12 of IC501, pins 70 to 73 of
IC201.
Check whether the pin 7 of IC501 and the pin 59 of IC201 are in
H state.
Does voltage on the IC701 pins 13 to 15 change in case of
record VOLUME UP/DOWN?
Check whether input waveform is observed on the pins 5
and 6 of IC703.
– 39 –
MD-MT20/20C/20W
FUNCTION TABLE OF IC
IC401 RH-iX0298AWZZ: System Microcomputer (IX0298AW) (1/3)
Pin No.
1 P12/TCLKA CIN Input Track cross signal/focus drive detection
2 TCLKB SPIN Input Spindle motor FG pulse detection input
3 P14 CHGON Output Ni-MH battery charge ON output
4 P15 DISCPR Input Disc record inhibition switch input
5 TIOCA2 SPWDS Input Spindle motor FG pulse width detection
6 P17 PDCNT Output Inner detection PD current control output
7 Vss VSS — Ground potential
8 TxD0 RMDAT Output Remote control indication data output
9 TxD1 DSPDAT Output Unit indication data output
10 P32 P32 Output Spare [connected to _RPLAY (pin 75)]
11 P33 DSPSTB Output Main unit's display strobe output
12* SCK0 SCK0 Output Serial I/O clock output (not used)
13 SCK1 DSPSCK Output Unit indication data clock output
14 PE0 _EPCS Output EEPROM chip selection output
15 PE1 EEPD Input/Output EEPROM serial data input/output
16 PE2 EEPK Output EEPROM serial clock output
17 PE3 PLVON Output Battery voltage measurement ON output
18 Vss VSS — Ground potential
19 PE4 PCNT1 Outout Vref supply control output of power IC
20 PE5 SYRS Output System LSI register selection output
21 PE6 _SYRD Output System LSI read enable output
22 PE7 _SYWR Output System LSI write enable output
23-30 PD0-PD7 SYD0-SYD7 Input/Output System LSI parallel data bus
31 Vss VSS — Ground potential
32 PC0 RCLAT Output Record audio IC data latch output
33 PC1 _MCPGI Input Microphone plug insertion detection input
34 PC2 _INPGI Input Line/digital plug insertion detection
35 PC3 INPGCK Input Line/digital plug type detection
36 PC4 RCPCNT Input/Output Record circuit power control output
37* PC5 TEST1 Input Test mode setting input 1
38* PC6 TEST0 Input Test mode setting input 0
39 PC7 JPNP Input Kana conversion/Kana input existence/nonexistence discrimination
40 Vcc VCC — Positive power supply
41* PB0 PBO Output Spare 0
42 PB1 _LCDRST Output LCD driver reset output
43 PB2 PBLAT Output Audio IC data latch output
44 PB3 LDON Output P.U. laser ON/OFF control output
45 PB4 OPICGA Output P.U. detection sensitivity selection output
46 PB5 RFLAT Output RF amplifier IC data latch output
47 PB6 RACLK Output RF/Audio IC data clock output
48 PB7 RADAT Output RF/Audio IC serial data output
49 Vss VSS — Ground potential
50 PA0 _ELON Output EL light control output
51 PA1 PLVGIN Output Battery voltage detection gain select output
52 PA2 _REC Input Unit REC button operation detection input
53 PA3 PBOPON Output Audio IC output stage control output
54 P20 _DCEXT Input DC-IN detection input
55 P21 _KHOLD Input Unit key hold switch input
56 TIOCC3 BUZOUT Output Beep sound pulse output
57 MD0 MD0 Input Operation mode selection input 0
Input/Output
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
FunctionPort Name Terminal Name
– 40 –
MD-MT20/20C/20W
IC401 RH-iX0298AWZZ: System Microcomputer (IX0298AW) (2/3)
Pin No.
58 MD1 MD1 Input Operation mode selection input 1
59 P23 INNSW Input Mechanism inner SW position detection input
60 WDTOVF WDTOVF Output Watch dog timer (not used)
61 MD2 MD2 Input Operation mode selection input 2
62 RES _RESET Input Microcomputer hard reset input
63 NMI _NMI Input Nonmaskable interruption (not used)
64 STBY _STBY Input Microcomputer standby input (not used)
65 Vcc VCC — Positive power supply
66 XTAL XTAL — Crystal connection terminal
67 EXTAL EXTAL — Crystal connection terminal
68 Vss VSS — Ground potential
69 PF7 _STOP Input Unit STOP button operation detection input
70 PF6 _PLAY Input Unit PLAY button operation detection input
71 PF5 EMPH0 Output Audio emphasis control output 0
72* PF4 PF4 Output Spare
73 PF3 _DINT Input System LSI interruption
74 PF2 _ARQD Input Disk cap opens and closes detection/it is started and required
75 PF1 _RPLAY Input Remote control PLAY key operation detection
76 IRQ0 _ARQK Input It is started by the button input, requirement
77 AVcc AVCC — A/D and D/A converter positive power supply
78 Vref VREF — A/D and D/A converter reference voltage
79 AN0 PLVBAT Input Battery voltage detection input
80 AN1 PLVDCI Input DC jack voltage detection input
81 P42 TEMP Output Ambient temperature detection input
82 AN3 RKEY Input Remote control key operation detection input
83 AN4 HKEY1 Input Unit key operation detection input 1
84 AN5 HKEY2 Input Unit key operation detection input 2
85 AN6 CHGCNT Output Charging current control output
86 DA1 LDVAR Output P.U. laser power setting output
87 AVss AVSS — A/D and D/A converter ground potential
88 Vss VSS — Ground potential
89 P24 BATOFF Output Battery OFF output
90 TIOCB4 MCMON Output Internal operation status monitor
91 P26 NIHEXT Input Ni-MH battery detection input
92 P27 DCNT1M Output Mechanism driver enable output
93 PG0 SENSE Input System LSI servo sense input
94 PG1 _FOK Input Focus OK signal input
95 PG2 _XRST Output System LSI hard reset output
96 PG3 CKSTP Output Microcomputer standby operation monitor output
97 PG4 _EJSW Input Ejection lever operation detection input
98 Vcc VDD — Positive power supply
99 P10 PCNT2 Output Vcc supply control output of power IC
100 P11 HDON Output Recording head current control output
Input/Output
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
FunctionPort Name Terminal Name
– 41 –
MD-MT20/20C/20W
IC401 RH-iX0298AWZZ: System Microcomputer (IX0298AW) (3/3)
System LSI expansion output port (6th generation: LR37811)
Pin No.
52 EXPORT0 LDCNT1 Output Recording head raising-lowering control output 1 See the separate table *3.
53 EXPORT1 LDCNT2 Output Recording head raising-lowering control output 2 See the separate table *3.
54 EXPORT2 — Output Not used. (Open)
55 EXPORT3 EMPH1 Output Audio emphasis control output 1 See the separate table *2.
56 EXPORT4 DCNT Output Mechanism driver enable output 'H': Driver operation ON
57 EXPORT5 OPTCNT Output Optical digital input circuit control 'H': Circuit operation ON
58 EXPORT6 DAPON Output D/A converter operation control output 'H': Operation ON
59 EXPORT7 ADPON Output A/D converter operation control output 'H': Operation ON
Port Name
Terminal Name Input/Output
Function
Remarks
*1: List of TEST port settings
TEST1
TEST0
H H Normal mode
H L No adjustment mode
L H Test mode
L L (Settings prohibited)
Details
*2: List of EMPH port settings
EMPH1 EMPH0
H H fs=32K: 'ON'
H L fs=48K: 'ON'
L H OFF
L L fs=44.1K: 'ON'
Details
*3: List of LDCNT port settings
LDCNT1 LDCNT0
H H Brake
H L Drive UP
L H Drive DOWN
L L Output OFF
Details
CIRCUIT DESCRIPTION
Charging control works as shown below.
Charging is performed in the following three modes.
Initial charging -> Main charging Supplementary charging -> Finish
The details are shown below.
The current value is measured by voltage on both ends of R250/R251.
Initial charging
The charging current is approx. 250 mA. The initial charging time varies depending on the battery condition. The charging time may
be more than five minutes, depending on the initial battery condition. If the battery voltage is below 2.0 V (or over 3.75 V) after two
minutes, the charging mode is cancelled. When the battery voltage is over 2.0 V and less than 3.75 V after five minutes, the main
charging mode is selected.
Main charging
The charging current is approx. 375 mA. The main charging time varies depending on the battery condition.
<Main charging stop mode>
When the full-charge check is performed, the output of pin 51 is pulled H and the voltage is measured at five minute intervals (eight
separate voltage measurements should be made to get a mean voltage value for consideration). The voltage value is read 500 msec
after the output of pin 51 (battery voltage detection gain select output) is pulled H.
The current reading is compared with the reading taken 30 minutes before and one of three judgements is given: Same, Higher or
Lower.
The voltage drop is detected, and the charging is stopped.
When battery voltage is over 2.8 V, a full-charge check will be performed (when it is below 2.8 V, the full-charge check will not be
conducted).
When the battery voltage is not over 2.8 V, the initial charging mode is not changed to the main charging mode.
It may be more than five minutes before the battery voltage exceeds 2.8 V.
(The initial charging time varies depending on the battery condition.)
Supplementary charging
The supplementary charging mode (charging current: 250 A) will be engaged using the following specifications, depending on the
main charging mode.
After the main charging is completed, the battery is charged for about two hours at a current of 250 mA, and then the charging mode
is cancelled.
– 42 –
MD-MT20/20C/20W
Battery voltage measurement
When the battery is being used or while it is being charged, the output of pin 17 should be H (battery voltage measurement output).
The output should be held L in the power-off mode and in the other modes. However, when it is necessary to measure the battery
voltage, pull pin 17 (battery voltage measurement output) H temporarily, to make the measurement.
Power supply change
When one of the power supplies is selected, the port settings are as follows:
Port name
Pin 3 Charge ON output L L
Pin 85 Charging current control output Output port L Output port H
Pin 89 Battery OFF output H (1) L (3)
The port settings in the power-off mode are as follows:
When operating from the AC adaptor
When operating from the battery
Port name
Pin 3 Charge ON output L L H
Pin 85 Charging current control output Output port L Output port L 3-mode output
Pin 89 Battery OFF output H (1) L (3) L
When operating from the AC adaptor
When operating from the battery
When charging
Charging test mode
For details about the test mode, see the separate page.
Charging circuit description
The charging current value is determined by measuring the voltage across R250/R251.
The charging current is controlled by IC805, Q252, IC803, the rechargeable battery, and R250/R251.
The reference voltage for IC401 is output from pin 85 (DA port) and is input on pin 5 on IC805.
Since the charging current is controlled by the NFB loop, the circuit is designed so that pin 5 on IC805 will have the same potential
as the voltage across R250/R251. Since R250/R251 is 0.5 ohms, the desired charging current can be obtained by varying the
potential of pin 5 on IC805.
Battery voltage measurement
The battery voltage can be measured using either of the following two modes.
1) Pin 51 on IC401 Output L
The output should always be L except during the following charging voltage measurement mode.
2) Pin 51 on IC401 Output H
The output should be H while in the charging voltage measurement mode.
Since the charging voltage is measured at intervals of five minutes while in the charging mode, the output should only be H about
500 msec every 5 minutes.
SW801
Ni-MH
BATTERY
DETECTION
VCC4
TP803
NFB loop
BATTERY
TERMINAL
Reference voltage
input section
Q253
RN1113
3
R260
3.3M
R257
100K
C254
0.1
R259
82K
R261
270K
R262
24K
R270
D
2
1
Q252
2SC4738 GR
100
G
R258
180K
C253
0.1
7
8
V+
O - +
D812
S
SB10015C
IC803
FDT439N
CHARGING
CIRCUIT
R256
18K
R255
5
6
+
-
O
IC805
NJM022V
V-
TP808
0.2M
C258
0.0047
Q254
RN1113
3
R254
2.2K
2
1
VCC3
R273
C250
D S S
1
D D
2
G
IC806
NDC631N
56K
0.1
6
5
4 3
R278
2.2K
R252
150K
R253
75K
R250
GND1
1
R804
1.0A
R251
Resistor to
detect the
charging
current
TP804
1
– 43 –
MD-MT20/20C/20W
–– MEMO ––
– 44 –
PARTS GUIDE
MD-MT20/20C/20W
MODEL
“HOW TO ORDER REPLACEMENT PARTS”
To have your order filled promptly and correctly, please furnish the
following information.
1. MODEL NUMBER 2. REF. No.
3. PART NO. 4. DESCRIPTION
MARK: SPARE PARTS-DELIVERY SECTION
Explanation of capacitors/resistors parts codes
Capacitors
VCC ....................... Ceramic type
VCK........................ Ceramic type
VCT........................ Semiconductor type
VC • • MF ............... Cylindrical type (without lead wire)
VC • • MN............... Cylindrical type (without lead wire)
VC • • TV................ Square type (without lead wire)
VC • • TQ ............... Square type (without lead wire)
VC • • CY ............... Square type (without lead wire)
VC • • CZ ............... Square type (without lead wire)
VC • • • • • • • • • J .. The 13th character represents capacity difference.
("J" ±5%, "K" ±10%, "M" ±20%, "N" ±30%,
"C" ±0.25 pF, "D" ±0.5 pF, "Z" +80-20%.)
If there are no indications for the electrolytic capacitors, error is ±20%.
MD-MT20(S)
MD-MT20C(S)
MD-MT20W(BL)
MD-MT20W(GL)
MD-MT20W(S)
For U.S.A. only
Contact your nearest SHARP Parts Distributor to order.
For location of SHARP Parts Distributor,
Please call Toll-Free;
1-800-BE-SHARP
Resistors
VRD ....................... Carbon-film type
VRS........................ Carbon-film type
VRN ....................... Metal-film type
VR • • MF ............... Cylindrical type (without lead wire)
VR • • MN............... Cylindrical type (without lead wire)
VR • • TV................ Square type (without lead wire)
VR • • TQ ............... Square type (without lead wire)
VR • • CY ............... Square type (without lead wire)
VR • • CZ ............... Square type (without lead wire)
VR • • • • • • • • • J .. The 13th character represents error.
("J" ±5%, "F" ±1%, "D" ±0.5%.)
If there are no indications for other parts, the resistors are ±5%
carbon-film type.
NOTE:
Parts marked with “ ” are important for maintaining the safety of the set.
Be sure to replace parts with specified ones for maintaining the safety and performance of the set.
MD-MT20/20C/20W
PARTS CODE NO. PARTS CODE
PRICE
RANK
DESCRIPTIONNO.
INTEGRATED CIRCUITS
IC101 VHIIR3R55//-1 J AQ RF Signal,Processor,IR3R55
IC200 VHI62FP2002-1 J AE 2.0V Regulator,62FP2002
IC201 VHILR37811/-1 J BB Encode/Decode/Servo Atrac,
IC202 RH-IX2567AFZZ J BA 4M bit D-RAM,IX2567AF
IC351 VHI74ACT02T-1 J AE Head Driver,74ACT02T
IC353 VHIFTD2005/-1 J AG Head Driver,FTD2005
IC354 VHICPH5608/-1 J AH Head Driver,CPH5608
IC401 RH-IX0298AWZZ J AX System Microcomputer,
IC402 VHIS29L294A-1 J AH EEPROM,S29L294A
IC431 VHIS80820LN-1 J AD Reset,S80820LN
IC501 VHIAK4519VF-1 J AQ AD/DA Converter,AK4519VF
IC601 VHIMPC17A39-1 J AQ 4ch PWM Driver,MPC17A39
IC651 VHILB1930M/-1 J AH Head Up/Down Driver,LB1930M
IC701 VHIIR3R54N/-1 J AQ Audio Amp.,IR3R54N
IC702 VHI62GR4522-1 J AG 4.5V Regulator,62GR4522
IC703 VHIIR3R54N/-1 J AQ Audio Amp.,IR3R54N
IC771 VHI62GR2522-1 J AG 2.5V Regulator,62GR2522
IC801 VHIHN1C01FU-1 J AD Over Voltage Reverse
IC802 VHIFDC634P/-1 J AG Over Voltage Reverse ConnecIC803 VSFDT439N//-1 J AL Charging Circuit,FDT439N
IC805 VHINJM022V/-1 J AG Charging Circuit,NJM022V
IC806 VHINDC631N/-1 J AG Charging Circuit,NDC631N
IC807 VHIRN4904//-1 J AD Charging Circuit,RN4904
IC808 VHIHN1C01FU-1 J AD Charging Circuit,HN1C01FU
IC820 VHI62FP2502-1 J AE 2.5V Regulator,62FP2502
IC821 VHIIR3M09N/-1 J AL DC/DC Converter,IR3M09N
IC822 VHICPH3403/-1 J AE 2.7V Regulator,CPH3403
IC841 VHIXC62HS02-1 J AE 2.35V Regulator,XC62HS02
IC851 VHITC7S14FU-1 J AE 2.35V Regulator,TC7S14FU
IC871 VHIS8324A28-1 J AH 2.8V Up Converter,S8324A28
IC872 VHIS80813LN-1 J AE 2.8V Up Converter,S80813LN
IC901 VHIBA6966FV-1 J AM Spindle Motor Driver,BA6966FV
Q873 VHINDS332P/-1 J AD FETIC,NDS332P
LR37811
IX0298AW
Connection Protection Circuit,
HN1C01FU
tion Protection Circuit,FDC634P
TRANSISTORS
Q101 VS2SA17457/-1 J AB Silicon,PNP,2SA17457
Q251 VSRN1113///-1 J AC Digital,NPN,RN1113
Q252 VS2SC4738GR-1 J AC Silicon,NPN,2SC4738 GR
Q253~255 VSRN1113///-1 J AC Digital,NPN,RN1113
Q461 VS2SC4738GR-1 J AC Silicon,NPN,2SC4738 GR
Q711 VSRN1444A//-1 J AC Digital,NPN,RN1444 A
Q721 VS2SC4213B/-1 J AC Silicon,NPN,2SC4213 B
Q874 VSRN1113///-1 J AC Digital,NPN,RN1113
Q901 VSRN1113///-1 J AC Digital,NPN,RN1113
DIODES
D351 VHDSBE803//-1 J AD Silicon,SBE803
D431 VHD1SS361//-1 J AB Silicon,1SS361
D461 VHDRB731U//-1 J AC Silicon,RB731U
D492 VHE15AZ7R5Y-1 J AC Zener,7.5V,15AZ7.5Y
D494 VHE15AZ7R5Y-1 J AC Zener,7.5V,15AZ7.5Y
D800 VHD1SS360//-1 J AB Silicon,1SS360
D801 VHDSB10015C-1 J AD Silicon,SB10015C
D802 VHE015Z5R1Y-1 J AD Zener,5.1V,015Z5.1Y
D803 VHD1SS382//-1 J AC Silicon,1SS382
D812 VHDSB10015C-1 J AD Silicon,SB10015C
D821 VHDEC30LA02-1 J AF Silicon,EC30LA02
D822 VHD1SS389//-1 J AB Silicon,1SS389
D831 VHD1SS372//-1 J AD Silicon,1SS372
D861 VHDEP10LA03-1 J AD Silicon,EP10LA03
D871 VHDEP10LA03-1 J AD Silicon,EP10LA03
COILS
L100 VPBNN100K0000 J AC 10 µH
L171 RCILC0356AFZZ J AC 10 µH,Choke
L201~206 RCILC0353AFZZ J AB Tip Solid Induction,100mA
L209 RCILC0353AFZZ J AB Tip Solid Induction,100mA
L451 RCILC0352AFZZ J AB Tip Impeder,150mA
L452~454 RCILC0353AFZZ J AB Tip Solid Induction,100mA
L456 RCILC0353AFZZ J AB Tip Solid Induction,100mA
L500 RCILC0344AFZZ J AC 47 µH,Choke
L600 RCILC0331AFZZ J AC 2.2 µH,Choke
L601~604 RCILC0358AFZZ J AC 4.7 µH,Choke
L608~610 RCILC0358AFZZ J AC 4.7 µH,Choke
PRICE
RANK
L702~704 RCILC0353AFZZ J AB Tip Solid Induction,100mA
L711~714 RCILC0353AFZZ J AB Tip Solid Induction,100mA
L719 VPBNNR47K0000 J AC 0.47 µH
L751,752 RCILC0354AFZZ J AC 22 µH,Choke
L771 RCILC0359AFZZ J AC 100 µH,Choke
L821 RCILC0004AWZZ J AF 4.7 µH,Choke
L822 RCILC0005AWZZ J AF 10 µH,Choke
L862 RCILC0359AFZZ J AC 100 µH,Choke
L871 RCILC0344AFZZ J AC 47 µH,Choke
L887,888 RCORF0017AWZZ J AE Tip Impeder
L921 RCILC0353AFZZ J AB Tip Solid Induction,100mA
DESCRIPTION
VIBRATORS
XL201 RCRSC0028AFZZ J AH Crystal,33.868 MHz
XL401 RCRM-0201AFZZ J AD Ceramic,4.19 MHz
CAPACITORS
C100 VCSATA0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C102,103 VCKYTV1AB105K J AD 1 µF,10V
C104 VCKYCY1CB273K J AA 0.027 µF,16V
C106 VCKYTV1CB224K J AB 0.22 µF,16V
C107 VCKYCY1EB123K J AA 0.012 µF,25V
C109 VCKYTV1AB105K J AD 1 µF,10V
C110 VCKYTV1CB224K J AB 0.22 µF,16V
C111 VCKYCY1HB332K J AA 0.0033 µF,50V
C112 VCKYCY1CB333K J AA 0.033 µF,16V
C121,122 VCCCCY1HH271J J AA 270 pF (CH),50V
C123,124 VCCSCY1HL391J J AA 390 pF,50V
C130 VCKYCY1CB104K J AB 0.1 µF,16V
C161 VCKYTV1AB105K J AD 1 µF,10V
C165 VCKYCY1CB333K J AA 0.033 µF,16V
C171 VCSATE0JJ107M J AE 100µF,6.3V,Electrolytic,Tantalum
C200,201 VCKYTV1AB105K J AD 1 µF,10V
C202 VCSATE0JJ476M J AD 47 µF,6.3V,Electrolytic,Tantalum
C203 VCKYCY1CB104K J AB 0.1 µF,16V
C204 VCKYTV1CB474K J AC 0.47 µF,16V
C205 VCKYCY1CB104K J AB 0.1 µF,16V
C207 VCKYCY1CB104K J AB 0.1 µF,16V
C209 VCCCCY1HH220J J AA 22 pF (CH),50V
C211,212 VCCCCY1HH5R0C J AA 5 pF (CH),50V
C250 VCKYCY1CB104K J AB 0.1 µF,16V
C253 VCKYTV1CB104K J AA 0.1 µF,16V
C254~256 VCKYCY1CB104K J AB 0.1 µF,16V
C258 VCKYCY1HB472K J AA 0.0047 µF,50V
C351 VCCCCY1HH560J J AA 56 pF (CH),50V
C353 VCSAFA0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C354 VCKYCY1CB104K J AB 0.1 µF,16V
C357 VCKYCY1CB104K J AB 0.1 µF,16V
C361 VCKYTV1HB393K J AB 0.039 µF,50V
C401 VCKYCY1CB104K J AB 0.1 µF,16V
C431 VCKYTV1CB474K J AC 0.47 µF,16V
C452 VCKYCY1HB102K J AA 1000 pF,50V
C454 VCKYCY1HB222K J AA 0.0022 µF,50V
C481,482 VCKYTQ1CB105K J AD 1 µF,16V
C491 VCKYTV1CB104K J AA 0.1 µF,16V
C500 VCSATA0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C501,502 VCKYCY1HB222K J AA 0.0022 µF,50V
C503,504 VCSATA1AJ335M J AB 3.3 µF,10V,Electrolytic,Tantalum
C505,506 VCKYCY1HB102K J AA 1000 pF,50V
C507 VCSATA0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C508 VCKYTV1AB105K J AD 1 µF,10V
C509,510 VCKYTV1CF225Z J AC 2.2 µF,16V
C511 VCKYTV1AB105K J AD 1 µF,10V
C600 VCEAPS226AF0J J AB 22 µF,6.3V,Electrolytic
C601~604 VCKYTV1AB105K J AD 1 µF,10V
C605 VCKYCY1CB104K J AB 0.1 µF,16V
C608 VCKYTQ1CB105K J AD 1 µF,16V
C609,610 VCKYTV1AB105K J AD 1 µF,10V
C622 VCKYCY1CB104K J AB 0.1 µF,16V
C651 VCKYTV1CF105Z J AB 1 µF,16V
C701,702 VCSATA0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C703 VCKYCY1EB103K J AA 0.01 µF,25V
C711,712 VCCCCY1HH101J J AA 100 pF (CH),50V
C713,714 VCKYTV1AB105K J AD 1 µF,10V
C715 VCKYCY1CB104K J AB 0.1 µF,16V
C719 VCSATA1AJ106M J AE 10 µF,10V,Electrolytic,Tantalum
C720 VCKYCY1HB102K J AA 1000 pF,50V
C721,722 VCSATA1AJ335M J AB 3.3 µF,10V,Electrolytic,Tantalum
C723,724 VCKYCY1HB102K J AA 1000 pF,50V
C725,726 VCSATA1AJ335M J AB 3.3 µF,10V,Electrolytic,Tantalum
C731 VCKYCY1CF224Z J AB 0.22 µF,16V
– 1 –
MD-MT20/20C/20W
NO. PARTS CODE
C733,734 VCKYTV1CB104K J AA 0.1 µF,16V
C735 VCKYCY1HB102K J AA 1000 pF,50V
C751,752 VCKYTV1CB823K J AB 0.082 µF,16V
C753,754 VCKYTV1CF105Z J AB 1 µF,16V
C755 VCKYCY1EB103K J AA 0.01 µF,25V
C756,757 VCKYTV1AB684K J AC 0.68 µF,10V
C758 VCSATA1AJ335M J AB 3.3 µF,10V,Electrolytic,Tantalum
C759,760 VCKYCY1CB273K J AA 0.027 µF,16V
C761,762 VCKYTV1CF225Z J AC 2.2 µF,16V
C765,766 VCKYTV1CB224K J AB 0.22 µF,16V
C771 VCSATE0JJ476M J AD 47 µF,6.3V,Electrolytic,Tantalum
C773 VCKYTV1CB224K J AB 0.22 µF,16V
C774 VCKYTV1CF105Z J AB 1 µF,16V
C776 VCKYCY1HB102K J AA 1000 pF,50V
C800 VCKYTV1AB105K J AD 1 µF,10V
C801 VCKYCY1CB104K J AB 0.1 µF,16V
C805 VCEAPS107AF0J J AC 100 µF,6.3V,Electrolytic
C806 VCKYTQ1AB335K J AF 3.3 µF,10V
C810 VCKYTV1CB334K J AC 0.33 µF,16V
C820 VCKYTV1AB105K J AD 1 µF,10V
C821 VCEAPS227AF0G J AC 220 µF,4V,Electrolytic
C822 VCCCCY1HH560J J AA 56 pF (CH),50V
C823 VCCSCY1HL391J J AA 390 pF,50V
C824 VCCSCY1HL561J J AA 560 pF,50V
C825 VCCCCY1HH4R0C J AA 4 pF (CH),50V
C826 VCKYTQ1CB105K J AD 1 µF,16V
C827 RC-SZ0001AWZZ J AG 22 µF,6.3V,Electrolytic
C828 VCKYTV1AB105K J AD 1 µF,10V
C829 VCKYCY1EB103K J AA 0.01 µF,25V
C830 VCKYCY1HB102K J AA 1000 pF,50V
C831,832 VCKYCY1CB104K J AB 0.1 µF,16V
C834 VCKYCY1CB104K J AB 0.1 µF,16V
C841 VCSATA0JJ106M J AD 10 µF,6.3V,Electrolytic,Tantalum
C851 VCCCCY1HH151J J AA 150 pF (CH),50V
C852 VCKYTV1AB105K J AD 1 µF,10V
C863 VCKYTQ1CB105K J AD 1 µF,16V
C865,866 VCKYTQ1CB105K J AD 1 µF,16V
C869 VCSATE0JJ476M J AD 47 µF,6.3V,Electrolytic,Tantalum
C871 VCKYTV1CB474K J AC 0.47 µF,16V
C874 RC-SZ1145AFZZ J AD 15 µF,10V,Electrolytic
C875 VCKYTV1CB104K J AA 0.1 µF,16V
C876,877 VCKYTV1AB105K J AD 1 µF,10V
C902 VCKYCY1EB103K J AA 0.01 µF,25V
C903 VCKYTQ1AB335K J AF 3.3 µF,10V
C905~907 VCKYCY1HB222K J AA 0.0022 µF,50V
C908 VCKYTV1CB224K J AB 0.22 µF,16V
C909,910 VCKYCY1CB333K J AA 0.033 µF,16V
C911 VCKYCY1CB104K J AB 0.1 µF,16V
PRICE
RANK
DESCRIPTION
RESISTORS
VRS-CY1JB000J J AA 0 ohm,Jumper,0.8×1.55mm,
VRS-TV2AB000J J AA 0 ohm,Jumper,1.25×2mm,Green
R101~104 VRS-CY1JB223J J AA 22 kohms,1/16W
R105 VRS-CY1JB394J J AA 390 kohms,1/16W
R106 VRS-CY1JB563J J AA 56 kohms,1/16W
R154 VRS-CY1JB122J J AA 1.2 kohms,1/16W
R161 VRS-CY1JB122J J AA 1.2 kohms,1/16W
R202 VRS-TV2AB330J J AA 33 ohms,1/10W
R204 VRS-CY1JB102J J AA 1 kohm,1/16W
R205 VRS-CY1JB334F J AA 330 kohms,1/16W
R206 VRS-CY1JB274F J AA 270 kohms,1/16W
R207 VRS-CY1JB681J J AA 680 ohms,1/16W
R222 VRS-CY1JB105J J AA 1 Mohm,1/16W
R250,251 VRS-TV2AB1R0F J AB 1 ohm,1/10W
R252 VRS-CY1JB154D J AA 150 kohms,1/16W
R253 VRS-CY1JB753D J AA 75 kohms,1/16W
R254 VRS-CY1JB222J J AA 2.2 kohms,1/16W
R255 VRS-CY1JB225J J AA 0.2 Mohms,1/16W
R256 VRS-CY1JB183J J AA 18 kohms,1/16W
R257 VRS-CY1JB104J J AA 100 kohm,1/16W
R258 VRS-CY1JB184J J AA 180 kohms,1/16W
R259 VRS-CY1JB823J J AA 82 kohms,1/16W
R260 VRS-CY1JB335J J AA 3.3 Mohms,1/16W
R261 VRS-CY1JB274F J AA 270 kohms,1/16W
R262 VRS-CY1JB243F J AA 24 kohms,1/16W
R263 VRS-CY1JB104J J AA 100 kohm,1/16W
R264 VRS-CY1JB183D J AA 18 kohms,1/16W
R265 VRS-CY1JB223D J AA 22 kohms,1/16W
R266 VRS-CY1JB104D J AA 100 kohm,1/16W
R267 VRS-CY1JB753D J AA 75 kohms,1/16W
Green
NO.
R268 VRS-CY1JB222J J AA 2.2 kohms,1/16W
R269,270 VRS-CY1JB101J J AA 100 ohm,1/16W
R271 VRS-CY1JB102J J AA 1 kohm,1/16W
R273 VRS-CY1JB563J J AA 56 kohms,1/16W
R274 VRS-CY1JB753D J AA 75 kohms,1/16W
R275 VRS-CY1JB563D J AA 56 kohms,1/16W
R276 VRS-CY1JB332D J AA 3.3 kohms,1/16W
R277 VRS-CY1JB393J J AA 39 kohms,1/16W
R278 VRS-CY1JB222J J AA 2.2 kohms,1/16W
R279 VRS-CY1JB101J J AA 100 ohm,1/16W
R351 VRS-TV2AB5R6J J AA 5.6 ohms,1/10W
R361 VRS-TQ2BB150J J AA 15 ohms,1/8W
R403 VRS-CY1JB102J J AA 1 kohm,1/16W
R404 VRS-CY1JB104J J AA 100 kohm,1/16W
R405 VRS-CY1JB103J J AA 10 kohm,1/16W
R406 VRS-CY1JB104J J AA 100 kohm,1/16W
R407 VRS-CY1JB103J J AA 10 kohm,1/16W
R408 VRS-CY1JB104J J AA 100 kohm,1/16W
R411 VRS-CY1JB104J J AA 100 kohm,1/16W
R412 VRS-CY1JB103J J AA 10 kohm,1/16W
R413~415 VRS-CY1JB102J J AA 1 kohm,1/16W
R422 VRS-CY1JB104J J AA 100 kohm,1/16W
R423 VRS-CY1JB223F J AA 22 kohms,1/16W
R424 VRS-CY1JB223J J AA 22 kohms,1/16W
R425 VRS-CY1JB223J J AA 22 kohms,1/16W
R426 VRS-CY1JB223F J AA 22 kohms,1/16W
R431 VRS-CY1JB334J J AA 330 kohms,1/16W
R451 VRS-CY1JB562J J AA 5.6 kohms,1/16W
R452 VRS-CY1JB822J J AA 8.2 kohms,1/16W
R453 VRS-CY1JB183J J AA 18 kohms,1/16W
R455 VRS-CY1JB562J J AA 5.6 kohms,1/16W
R456 VRS-CY1JB822J J AA 8.2 kohms,1/16W
R457 VRS-CY1JB183J J AA 18 kohms,1/16W
R458 VRS-CY1JB563J J AA 56 kohms,1/16W
R460 VRS-CY1JB683J J AA 68 kohms,1/16W
R461~465 VRS-CY1JB104J J AA 100 kohm,1/16W
R466 VRS-CY1JB564J J AA 560 kohms,1/16W
R467 VRS-CY1JB183J J AA 18 kohms,1/16W
R492 VRS-CY1JB102J J AA 1 kohm,1/16W
R500 VRS-CY1JB4R7J J AA 4.7 ohms,1/16W
R501,502 VRS-CY1JB471J J AA 470 ohms,1/16W
R600 VRS-CY1JB560J J AA 56 ohms,1/16W
R601 VRS-CY1JB563J J AA 56 kohms,1/16W
R701,702 VRS-CY1JB101J J AA 100 ohm,1/16W
R703 VRS-CY1JB124J J AA 120 kohms,1/16W
R710 VRS-TV2AB560J J AA 56 ohms,1/10W
R711,712 VRS-CY1JB562J J AA 5.6 kohms,1/16W
R713,714 VRS-CY1JB103J J AA 10 kohm,1/16W
R715,716 VRS-CY1JB104J J AA 100 kohm,1/16W
R717 VRS-CY1JB102J J AA 1 kohm,1/16W
R719,720 VRS-CY1JB822J J AA 8.2 kohms,1/16W
R723,724 VRS-CY1JB682J J AA 6.8 kohms,1/16W
R725 VRS-CY1JB101J J AA 100 ohm,1/16W
R726 VRS-CY1JB393J J AA 39 kohms,1/16W
R727 VRS-CY1JB822J J AA 8.2 kohms,1/16W
R728 VRS-CY1JB102J J AA 1 kohm,1/16W
R729,730 VRS-CY1JB272J J AA 2.7 kohms,1/16W
R753 VRS-CY1JB124J J AA 120 kohms,1/16W
R754 VRS-CY1JB274J J AA 270 kohms,1/16W
R756,757 VRS-CY1JB273J J AA 27 kohms,1/16W
R761,762 VRS-CY1JB432J J AA 4.3 kohms,1/16W
R763,764 VRS-CY1JB680J J AA 68 ohms,1/16W
R765,766 VRS-CY1JB180J J AA 18 ohms,1/16W [MD-MT20W]
R765,766 VRS-CY1JB8R2J J AA 8.2 ohms,1/16W [MD-MT20/20C]
R767,768 VRS-CY1JB102J J AA 1 kohm,1/16W
R769,770 VRS-CY1JB153J J AA 15 kohms,1/16W
R800 VRS-CY1JB223J J AA 22 kohms,1/16W
R801 VRS-CY1JB222F J AA 2.2 kohms,1/16W
R802 VRS-CY1JB102J J AA 1 kohm,1/16W
R803 VRS-CY1JB104J J AA 100 kohm,1/16W
R804 VHHMSMDC100-1 J AH Thermistor,Positive/Negative C,
R806 VRS-TV2AB102J J AA 1 kohm,1/10W
R807 VRS-CY1JB681F J AA 680 ohms,1/16W
R808 VRS-CY1JB562J J AA 5.6 kohms,1/16W
R809 VRS-CY1JB222J J AA 2.2 kohms,1/16W
R810,811 VRS-CY1JB184F J AA 180 kohms,1/16W
R815 VRS-CY1JB563F J AA 56 kohms,1/16W
R816 VRS-CY1JB243F J AA 24 kohms,1/16W
R821 VRS-CY1JB104J J AA 100 kohm,1/16W
R823 VRS-CY1JB104J J AA 100 kohm,1/16W
R824 VRS-CY1JB153J J AA 15 kohms,1/16W
PRICE
RANK
DESCRIPTIONPARTS CODE
1.0A
– 2 –
MD-MT20/20C/20W
PARTS CODE NO. PARTS CODE
R826 VRS-CY1JB103J J AA 10 kohm,1/16W
R827 VRS-CY1JB304F J AF 300 kohms,1/16W
R828 VRS-CY1JB224F J AA 220 kohms,1/16W
R829 VRS-CY1JB333J J AA 33 kohms,1/16W
R831 VRS-CY1JB104J J AA 100 kohm,1/16W
R832 VRS-CY1JB106J J AA 10 Mohm,1/16W
R833 VRS-CY1JB470J J AA 47 ohms,1/16W
R851 VRS-CY1JB103J J AA 10 kohm,1/16W
R852 VRS-CY1JB473J J AA 47 kohms,1/16W
R853 VRS-CY1JB101J J AA 100 ohm,1/16W
R871 VRS-CY1JB103J J AA 10 kohm,1/16W
R878 VRS-CY1JB104J J AA 100 kohm,1/16W
R901,902 VRS-CY1JB1R0J J AA 1 ohm,1/16W
R903 VRS-CY1JB331J J AA 330 ohms,1/16W
R904 VRS-CY1JB333J J AA 33 kohms,1/16W
R905 VRS-CY1JB104J J AA 100 kohm,1/16W
R906 VRS-CY1JB274J J AA 270 kohms,1/16W
R907 VRS-CY1JB184J J AA 180 kohms,1/16W
R908 VRS-CY1JB104J J AA 100 kohm,1/16W
R909 VRS-CY1JB103J J AA 10 kohm,1/16W
R920 VRS-CY1JB104J J AA 100 kohm,1/16W
R921 VRS-CY1JB331J J AA 330 ohms,1/16W
R922 VRS-CY1JB104J J AA 100 kohm,1/16W
PRICE
RANK
DESCRIPTIONNO.
OTHER CIRCUITRY PARTS
CN101 QCNCW801XAFZZ J AH Socket,22Pin
CN451 QCNCW804NAFZZ J AE Socket,13Pin
CN482 QCNCW804JAFZZ J AE Socket,9Pin
CN601 QCNCW716RAFZZ J AF Socket,16Pin
CN701,702 QCNCWWQ33AFZZ J AE Socket,33Pin
! F871 QFS-L501AAFN0 J AG Fuse,T0.5A L 63V
J701 VHLGP1FB95R-1 J AP Jack,Optical/Line IN
J702 QJAKM0014AWZZ J AF Jack,Mic IN
J703 QJAKM0015AWZZ J AL Jack,Remote Control/
J801 QJAKC0007AWZZ J AF Jack,DC IN
M901 RMOTV0524AFZZ J AS Motor Ass’y [Spindle]
M902 RMOTV0511AFZZ J AT Motor Ass’y [Sled]
M903 RMOTV0512AFM1 J AR Motor Ass’y [Head Up/Down]
PH901(8-3) VHPGP1S93K/-1 J AF Phote Interrupter,GP1S93K
SW401 QSW-M0172AFZZ J AD Switch,Push Type [Eject]
SW402 QSW-S0948AFZZ J AC Switch,Slide Type [Hold]
SW403 QSW-M0172AFZZ J AD Switch,Push Type
SW801 QSW-M0006AWZZ J AD Switch,Push Type
SW902(8-2) QSW-M0170AFZZ J AD Switch,Push Type [Disc Protect]
Headphones
[Disc Lid Open]
[Ni-MH Battery Detection]
MECHANICAL PARTS
1 NGERH0597AFZZ J AC Wheel,Drive
2 NSFTD0334AFZZ J AD Screw,Drive
3 LHLDX3141AFM1 J AP Cartridge Holder Ass’y
4 MSPRT1625AFFJ J AD Spring,Eject Lever
5 LANGF1610AFZZ J AC Bracket,Cancel
6 LCHSM0944AFM1 J AT Main Chassis Ass’y
7 PCUSG0599AFZZ J AB Cushion,Mechanism
8 QPWBH0337AFM1 J AN Mechanism Flexible PWB Ass’y
8- 1 ———— — Mechanism Flexible PWB
8- 2(SW902) QSW-M0170AFZZ J AD Switch,Push Type [Disc Protect]
8- 3(PH901) VHPGP1S93K/-1 J A F Phote Interrupter,GP1S93K
9 MSPRP0925AFZZ J Spring,Drive Screw
10 PCOVP1339AFZZ J AD Cover,Mechanism
11 MARMM0170AFM1 J AK Magnetic Field Block
12 NGERH0603AFZZ J AE Gear,Drive
! 13 RCTRH8175AFZZ J BM Optical Pickup Unit
! 13 RCTRH8175AF10 J BM Optical Pickup Unit [For U.S.A.]
14 MSPRP0922AFFJ J AD Spring,Drive Grip
15 MSPRP0923AFZZ J Spring,Thrust Plate
16 NSFTM0292AFFW J AC Shaft,Guide
17 MLEVF2641AFZZ J Lever,Eject
18 QPWBH0338AFZZ J AH Magnetic Head Flexible PWB
19 MLEVF2637AFM1 J AH Lift Working Lever Ass’y
20 MLEVF2638AFFW J AD Lever,Block
21 MLEVF2639AFFW J AD Lever,Lift Joint
22 MLEVF2640AFZZ J Lever,Lift
23 MSPRD1362AFFJ J AD Spring,Lift Lever
24 RCILH0112AFZZ J AM Magnetic Head
501 LX-BZ0804AFFF J AA Screw,ø1.4×2.2mm
502 LX-JZ0154AFZZ J AA Screw,ø1.4×2.8mm
(Not Replacement Item)
[Except for U.S.A.]
PRICE
RANK
503 LX-BZ0823AFZZ J AA Screw,ø1.4×1.2mm
504 LX-WZ9290AFZZ J AA Washer,ø0.8×ø2.4×0.2mm
505 LX-BZ0800AFZZ J AA Screw,ø1.4×2.5mm
506 XSPSN14P01500 J A A Screw,ø1.7×2.5mm
507 LX-JZ0148AFZZ J AA Screw,ø1.7×3mm
508 XWSSD14-05000 J AA Washer,ø1.4×0.5mm
509 LX-BZ0959AFZZ J AB Screw,ø1.4×1.8mm
510 LX-WZ9296AFZZ J AA Washer,ø1.5×ø3.5×0.25mm
511 LX-BZ0974AFZZ J AB Screw,ø1.4×5.5mm
512 LX-BZ0991AFZZ J AB Screw,ø1.2×1.6mm
M901 RMOTV0524AFZZ J AS Motor Ass’y [Spindle]
M902 RMOTV0511AFZZ J AT Motor Ass’y [Sled]
M903 RMOTV0512AFM1 J AR Motor Ass’y [Head Up/Down]
DESCRIPTION
CABINET PARTS
201 GFTAT3004AWM1 J AW Top Cabinet Ass’y
201 GFTAT3004AWM2 J AW Top Cabinet Ass’y
201 GFTAT3004AWM3 J AW Top Cabinet Ass’y
201- 1 ———— — Top Cabinet
201- 2 ———— — Bracket,Top Cabinet
202 HDECQ0480AWM1 J AM Decoration Plate Ass’y
202- 1 ———— — Plate,Decoration
202- 2 PSHEZ0033AWZZ J AD Sheet,Decoration Plate
203 TCAUS0044AWZZ J AB Label A,Class 3B
204 PSHEZ0035AWZZ J AB Sheet A,Operation Button
205 PSHEZ0036AWZZ J AB Sheet B,Operation Button
206 PSHEZ0037AWZZ J AC Sheet C,Operation Button
207 JKNBZ0623AWSA J AM Button,Operation
208 LANGT0058AWFW J AG Bracket,Operation Button
209 MSPRP0026AWFW J AB Spring A,Cartridge
210 MSPRP0027AWFW J AC Spring B,Cartridge
211 MSPRP0028AWFW J AB Spring C,Cartridge
212 TCAUS0043AWZZ J AC Label B,Class 3B
213 RUNTK0005AWZZ J AV Key Switch Flexible PWB Ass’y
214 RUNTZ0015AWZZ J BD LCD Ass’y
215 PSHEZ0046AWZZ J AB Sheet E,LCD
216 PSHEZ0044AWZZ J AB Sheet C,LCD
217 PCUSZ0016AWZZ J AB Cushion,Mechanism,Top
218 PSHEZ0045AWZZ J AB Sheet D,LCD
219 PCUSZ0017AWZZ J AB Cushion,Cartridge
220 GFTAU3008AWSA J AS Bottom Cabinet [MD-MT20-S]
220 GFTAU3009AWSA J AS Bottom Cabinet [MD-MT20C-S]
220 GFTAU3010AWSA J AS Bottom Cabinet [MD-MT20W-S]
220 GFTAU3011AWSA J AS Bottom Cabinet [MD-MT20W-BL]
220 GFTAU3012AWSA J AS Bottom Cabinet
221 JKNBZ0625AWSA J AD Button,Hold
222 GCOVA1241AWSA J AC Cover,DC IN Jack
223 PSHET0014AWZZ J AE Sheet,Bottom Cabinet
224 PSHEZ0043AWZZ J AB Insulate Fiber,
225 LHLDZ3010AWM1 J AW Main Frame Ass’y
226 PCUSZ0015AWZZ J AB Cushion,Mechanism,Front
227 PCUSZ0014AWZZ J AB Cushion,Mechanism,Right
228 PCUSG0534AFZZ J AC Rubber,Preventive Vibration
229 PCUSG0641AFSA J AB Insulator
230 PSHET0015AWZZ J AB Sheet B,Insulator
231 PSHET0016AWZZ J AC Sheet C,Insulator
232 PCOVW1009AW00 J AC Cover,Battery Terminal,233 QTANB9018AWFQ J AD Terminal,Battery,234 PCOVW1008AW00 J AC Cover,Battery Terminal,+
235 QTANB9017AWFQ J AD Terminal,Battery,+
236 PGIDM0027AW00 J AC Guide,Battery
237 QTANB9016AWFQ J AD Terminal,Battery,+/238 LHLDZ1231AW00 J AC Holder,Battery Terminal,+/239 MLEVP0094AW00 J AC Lever,Battery Push
240 JKNBZ0624AWSA J AF Lever,Open
241 GCABA1185AWSA J AF Front Cabinet
241 GCABA1185AWSB J AF Front Cabinet [MD-MT20W-BL]
242 GCABB1185AWSA J AE Rear Cabinet
242 GCABB1185AWSB J AE Rear Cabinet [MD-MT20W-BL]
[MD-MT20-S/20C-S/20W-S]
[MD-MT20W-BL]
[MD-MT20W-GL]
(Not Replacement Item)
(Not Replacement Item)
(Not Replacement Item)
[MD-MT20W Only]
[MD-MT20W Only]
[MD-MT20W-GL]
Bottom Cabinet Sheet
[Except for MD-MT20W-BL]
[Except for MD-MT20W-BL]
– 3 –
MD-MT20/20C/20W
NO. PARTS CODE
243 QCNWN1478AWZZ J AG Flat Cable,33Pin
244 PSHEF0019AWZZ J AB Felt,Mechanism Flexible PWB
245 GDORB0001AWSA J AE Door,Battery [MD-MT20-S/
245 GDORB0001AWSB J AE Door,Battery [MD-MT20W-BL]
245 GDORB0001AWSC J AE Door,Battery [MD-MT20W-GL]
246 PCUSZ0012AWZZ J AB Cushion,Vub
247 PSHEZ0047AWZZ J Insulate Fiber B
601 LX-BZ0045AWF3 J Screw,ø1.4×2mm
602 LX-BZ0805AFFN J AB Screw,ø1.7×2.5mm
603 LX-BZ0045AWFN J Screw,ø1.4×2mm
PRICE
RANK
DESCRIPTION
20C-S/20W-S]
ACCESSORIES/PACKING PARTS (MD-MT20C/20W)
QCNWG0382AFZZ J AK Connecting Cord,RCA Type
QCNWG0422AFZZ J AQ Optical Digital Cable
RADPA3040AWZZ J AX AC Adaptor [MD-MT20C]
RADPA5402AFZZ J BF AC Adapter [MD-MT20W Except
RADPA5403AFZZ J BF AC Adaptor
RADPA6435AFZZ J BG AC Adaptor [MD-MT20W for
RADPA8493AFZZ J BH AC Adaptor [MD-MT20W for
RPHOH0003AWZZ J AZ Headphones [MD-MT20C Only]
RPHOH0176AFZZ J AR Earphones [MD-MT20W Only]
RRMCW0001AWSA J AZ Remote Control
SPAKA0219AWZZ J AC Packing Add.,Unit [MD-MT20W]
SPAKA0220AWZZ J AC Packing Add.,Unit [MD-MT20C]
SPAKC0810AWZZ J AG Packing Case [MD-MT20W-S]
SPAKC0811AWZZ J AG Packing Case [MD-MT20C]
SPAKC0825AWZZ J AG Packing Case [MD-MT20W-BL]
SPAKC0829AWZZ J AG Packing Case [MD-MT20W-GL]
SPAKZ0485AWZZ J AD Pad,AC Adaptor [MD-MT20C]
SPAKZ0486AWZZ J AD Pad,AC Adaptor [MD-MT20W
SPAKZ0487AWZZ J AD Pad,AC Adaptor [MD-MT20W for
SPAKZ0490AWZZ J AC Pad,Operation Manual
SPAKZ0518AWZZ J AB Sheet,Protect
SPAKZ0522AWZZ J AC Cushion,Protect
TCAUA0040AWZZ J AB Card,Taiwan Caution
TCAUH0050AWZZ J AB Caution,Headphones
TGANZ0022AW20 J AE Card,Taiwan Guarntee [MD-
TGANZ0022AW21 J AE Card,Taiwan Guarntee [MD-
TGANZ0022AW32 J Card,Taiwan Guarntee [MD-
TINSE0253AWZZ J AE Operation Manual [MD-MT20W
TINSK0093AWZZ J AG Operation Manual [MD-MT20C]
TINSZ0431AWZZ J AG Operation Manual [MD-MT20W
TLABE0304AWZZ J AB Label,Bar Code [MD-MT20W-S
TLABE0305AWZZ J AB Label,Bar Code [MD-MT20W-GL
TLABE0306AWZZ J AB Label,Bar Code [MD-MT20W-BL
TLABG0002AWZZ J AB Label,Hong Kong [MD-MT20W
TLABH0055AWZZ J AF Sheet,E/C Comparision [MD-
TLABJ0009AWSA J AB Label,SHARP Corpration Japan
TLABJ0010AWZZ J AB Label,Japan [MD-MT20W for
TLABN0088AWZZ J AB Label,SER No. [Except for
for Taiwan/Australia/
New Zealand/Hong Kong]
[MD-MT20W for Taiwan]
Australia/New Zealand]
Hong Kong]
Except for Australia/
New Zealand]
Australia/New Zealand]
[MD-MT20W for Australia/
New Zealand Only]
[MD-MT20W for Taiwan Only]
[MD-MT20C Only]
MT20W-BL for Taiwan Only]
MT20W-GL for Taiwan Only]
MT20W-S for Taiwan Only]
for Australia/New Zealand]
Except for Australia/
New Zealand]
for Australia/New Zealand/
Taiwan Only]
for Australia/New Zealand/
Taiwan Only]
for Australia/New Zealand/
Taiwan Only]
for Hong Kong Only]
MT20W for Taiwan Only]
[MD-MT20W for Chile/Peru/
Bolivia Only]
Chile/Peru/Bolivia Only]
Taiwan of MD-MT20W]
NO.
TLABN0092AWZZ J AB Label,SER No. [MD-MT20C/20W
TLABN0092AW02 J AB Label,SER No. [MD-MT20W
TLABN0094AWZZ J AB Label,Taiwan SER.No. [MDTLABRF232AWZZ J AB Label,Bar Code [MD-MT20C]
TLABR1054AWZZ J AB Label,Bar Code [MD-MT20W-S
TLABR1055AWZZ J AB Label,Bar Code [MD-MT20W-BL
TLABR1056AWZZ J AB Label,Bar Code [MD-MT20W-GL
TLABS0225AWZZ J AB Label,CPA [MD-MT20W for Asia/
TLABZ0589AWZZ J AB Label,Taiwan Impoter [MDTLABZ0590AWZZ J AB Label,Taiwan Impoter [MDTLABZ0591AWZZ J AB Label,Taiwan Impoter [MDTLABZ0600AWSA J AC Label,Made in Malaysia [MD-
TLABZ0618AWZZ J AB Label,Made in Malaysia [MD-
TLSTS0011AWZZ J AB Taiwan SS List
TSPC-0574AWZZ J AC Label,Taiwan Specifications
TSPC-0576AWZZ J AC Label,Taiwan Specification [MDTSPC-0577AWZZ J AC Label,Taiwan Specifications
UBAGC0001AWZZ J AK Battery Carrying Case
UBAGC0002AWSA J AK Carrying Case
UBATM0002AWSA J BC Battery,Rechargeable Nickel-
92LG-CARD1266E J AB Gurantee Card [MD-MT20W for
92LPLUG155A J AG Adaptor,AC Plug [MD-MT20W
PRICE
RANK
DESCRIPTIONPARTS CODE
for New Zealand]
Except for Asia/Middle and
Near East/Africa/Australia/
New Zealand/Hong Kong]
MT20W for Taiwan Only]
for Central South America/
Brazil/Chile/Peru/Bolivia Only]
for Central South America/
Brazil/Chile/Peru/Bolivia Only]
for Central South America/
Brazil/Chile/Peru/Bolivia Only]
Middle and Near East/Africa
Only]
MT20W-S for Taiwan Only]
MT20W-BL for Taiwan Only]
MT20W-GL for Taiwan Only]
MT20W for Australia/
New Zealand/Brazil Only]
MT20W for Australia/New
Zealand/Taiwan/Brazil Only]
[MD-MT20W for Taiwan Only]
[MD-MT20W-S for Taiwan
Only]
MT20W-BL for Taiwan Only]
[MD-MT20W-GL for Taiwan
Only]
Metal Hydride
Australia/New Zealand Only]
for Middle South America/
Brazil/Chile/Peru/Bolivia Only]
ACCESSORIES (MD-MT20)
QCNWG0382AFZZ J AK Connecting Cord,RCA Type
QCNWG0422AFZZ J AQ Optical Digital Cable
RADPA3040AWZZ J AX AC Adaptor [MD-MT20]
RPHOH0003AWZZ J AZ Headphones [MD-MT20]
RRMCW0001AWSA J AZ Remote Control
TCAUH0050AWZZ J AB Caution,Headphones
TINSE0254AWZZ J AE Operation Manual [MD-MT20]
TINSZ0429AWZZ J AB Quick Guide [MD-MT20 Only]
UBAGC0001AWZZ J AK Battery Carrying Case
UBAGC0002AWSA J AK Carrying Case
UBATM0002AWSA J BC Battery,Rechargeable Nickel-
[MD-MT20 Only]
Metal Hydride
P.W.B. ASSEMBLY (Not Replacement Item)
PWB-A1,2 92LPWB3107MDSS J — Main,Audio (Combined Ass’y)
OTHER SERVICE PARTS
UDSKM0001AFZZ J AZ Recording Mini Disc
88GMMD-110 J BV High Reflection Disc MMD-110
88GMMD-212 J BU Low Reflection Disc MMD-212
88GMMD-213A J Low Reflection Disc MMD-213A
(TEAC Test MD)
(TEAC Test MD)
(TEAC Test MD)
– 4 –
MD-MT20/20C/20W
501x2
508x2
A
11
506
8
8-3(PH901)
24
B
505
16
14
509
C
502x3
512
18
(SW902)
503
8-1
8-2
507
13
2
D
M903
511
7
M901
9
1
507
19
15
510
21
503x2
504
E
12
6
M902
20
F
10
503
5
3
G
22
17
H
23
4
1
23456
Figure 5 MD MECHANISM EXPLODED VIEW
– 5 –
MD-MT20/20C/20W
229x2
230
A
202-1
202-2
603x2
202
201
B
201-1
239
603x2
228
238
237
245
231
227
226
243
225
236
PWB-A2
C
204
206
201-2
203
234
235
233
232
602x3
247
PWB-A1
205
MD-MT20W Only
207
214
D
602
602
244
601
215
216x2
E
208
F
218
213
217
209
240
224
223
242
241
219
601
211
210
G
212
MD-MT20W Only
219
222
603x2 603
MD MECHANISM
220
H
246
1
23456
Figure 6 CABINET EXPLODED VIEW
– 6 –
603x2
221
603x2
MD-MT20/20C/20W
PACKING OF THE SET (MD-MT20 ONLY)
Setting position of switches and knobs
UNIT HOLD OFF
Remote Control HOLD CANCEL
AC Adaptor
Connecting Cord
Rechargeable
Headphones
Battery Carrying
Case
SPAKZ0485AWZZ
AC Adaptor Pad
Remote Control
Battery
Optical Digital Cable
Operation Manual
Headphones Caution
Quick Guide
Carying Case
TLABN0088AWZZ
SER No. Label
SPAKZ0522AWZZ
Protect Cushion
SPAKC0809AWZZ
Packing Case
Not Replacement Item
SPAKA0220AWZZ
Packing Add., Unit
1
3
TLABN0092AWZZ
SER No. Label
SPAKZ0518AWZZ
Protect Sheet
2
TLABR1051AWZZ
Bar Code Label
COPYRIGHT 1999 BY SHARP COPORATION
©
ALL RIGHTS RESERVED.
No part of this publication may be reproduced,
stored in a retrieval system, or transmitted in
any from or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without
prior written permission of the publisher.
– 7 –
SHARP CORPORATION
Communication Systems Group
Quality & Reliability Control Center
Higashihiroshima, Hiroshima 739-0192, Japan
Printed in Japan
A9907-3034NS•HA•M
SA • SC • SL • SZ • EX • LAG
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