Page 1
MD-MT20/20C/20W
– 1 –
CONTENTS
Page
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)
SERVICE MANUAL
SHARP CORPORATION
No. S6943MDMT20//
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
MD-MT20(S)
MD-MT20C(S)
MD-MT20W(BL)
MD-MT20W(GL)
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-MT20/20C
Illustration: MD-MT20W
Page 2
MD-MT20/20C/20W
– 2 –
Figure 2-1 Figure 2-2
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.
SAFETY PRECAUTION FOR SERVICE MANUAL (MD-MT20W ONLY)
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
CAUTION
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
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.
Magnet Head
Laser Beam
Optical Pick-Up
Main PWB
Spindle motor
Mechanism
Chassis
Page 3
MD-MT20/20C/20W
– 3 –
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO
THE OPERATION MANUAL.
SPECIFICATIONS
Specifications for this model are subject to change without prior
notice
General
Power source:
DC 2.4V: Rechargeable Nickel-Metal Hydride battery (AD-
T20BT) x 1
DC 5V: AC adaptor (AC 110 - 240V, 50/60 Hz)
DC 3.0V: Commercially available, “AA” size (LR6), alkaline
battery x 2
DC 4.5V: Separately available car adaptor, AD-CA20X
(for cars with a 12-24V DC negative earth electri-
cal system)
Power consumption:
0.15A (AC adaptor)
Output power:
RMS; 20 mW (10 mW + 10 mW)
(0.2% T.H.D.)
Charging time:
Approx. 4 hours (90 %)
Approx. 6 hours (fully charged)
(When using the AC adaptor included with the unit)
Battery life:
When using the rechargeable
battery (fully charged) included
with the unit
When using two, commercially
available, high capacity, “AA”
size (LR6), alkaline batteries
Continuous recording:
Approx. 7.5 hours
Continuous recording:
Approx. 7.5 hours
Continuous play:
Approx. 12 hours
Continuous play:
Approx. 15 hours
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:
Recording level Reference input level Input impedance
MIC H 0.25 mV 10 k ohms
MIC L
2.5 mV 10 k ohms
LINE 100 mV 20 k ohms
Output level:
Specified
output
Maximum
output level
Load
impedance
Earphones — 10 mW + 10 mW 32 ohms
LINE
250 mV
(-12dB)
—
10 k ohms
Dimensions: Width: 87.9 mm (3-7/16")
Height: 29.8 mm (1-3/16")
Depth: 79.7 mm (3-1/8")
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
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:
20 – 20,000 Hz (± 3 dB)
Rotation speed: Approx. 400 – 900 rpm
Error correction: ACIRC (Advanced Cross Interleave Reed-Solomon Code)
Coding: ATRAC (Adaptive Transform Acoustic Coding), 24-bit com-
puted type
Recording method: Magnetic modulation overwrite method
Sampling frequency:
44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz,
and then recorded.)
Wow and flutter:
■ General
Power source:
DC 2.4V: Rechargeable Nickel-Metal Hydride battery (AD-
T20BT) x 1
DC 5V: AC adaptor (AC 120V, 60 Hz)
DC 3.0V: Commercially available, “AA” size (LR6), alkaline
battery x 2
DC 4.5V: Separately available car adaptor, AD-CA20X
(for cars with a 12-24V DC negative ground elec-
trical system)
Power consumption:
7.5W(AC adaptor)
Output power:
RMS; 20 mW (10 mW + 10 mW)
(0.2% T.H.D.)
Charging time:
Approx. 4 hours (90 %)
Approx. 6 hours (fully charged)
(When using the AC adaptor included with the unit)
Battery life:
When using the rechargeable
battery (fully charged) included
with the unit
When using two, commercially
available, high capacity, “AA”
size (LR6), alkaline batteries
Continuous recording:
Approx. 7.5 hours
Continuous recording:
Approx. 7.5 hours
Continuous play:
Approx. 12 hours
Continuous play:
Approx. 15 hours
Unmeasurable (less than ±0.001% W. peak)
● 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:
Recording level Reference input level Input impedance
MIC H 0.25 mV 10 k ohms
MIC L
2.5 mV 10 k ohms
LINE 100 mV 20 k ohms
Output level:
Specified
output
Maximum
output level
Load
impedance
Headphones — 10 mW + 10 mW 16 ohms
LINE
250 mV
(-12dB)
—
10 k ohms
Dimensions: Width: 3-7/16"(87.9 mm)
Height: 1-3/16" (29.8 mm)
Depth: 3-1/8" (79.7 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
■ 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:
20 – 20,000 Hz (± 3 dB)
Rotation speed: Approx. 400 – 900 rpm
Error correction: ACIRC (Advanced Cross Interleave Reed-Solomon Code)
Coding: ATRAC (Adaptive Transform Acoustic Coding), 24-bit com-
puted type
Recording method: Magnetic modulation overwrite method
Sampling frequency:
44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz,
and then recorded.)
Wow and flutter:
MD-MT20/20C MD-MT20W
Page 4
MD-MT20/20C/20W
– 4 –
NAMES OF PARTS
Illustration: MD-MT20/20C
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
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
33
34
35
123456
7
8
9
10
11
12
13
14
15 16
22
17
28
18 20 21
23
27262524
19
29
30
32
31
4
2
5
1
6
7
8
9
3
Remote control unit
1. Headphones Jack (MD-MT20/20C)
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. Earphones Socket (MD-MT20W)
Page 5
MD-MT20/20C/20W
– 5 –
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 DAT
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
Page 6
MD-MT20/20C/20W
– 6 –
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.
Page 7
MD-MT20/20C/20W
– 7 –
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
Page 8
MD-MT20/20C/20W
– 8 –
OUICK GUIDE (MD-MT20 ONLY)
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
Page 9
MD-MT20/20C/20W
– 9 –
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.
Page 10
MD-MT20/20C/20W
– 10 –
1 Bottom Cabinet 1. Screw .....................(A1) x7 10-1
2 Top Cabinet 1. Open the Top cabinet. 10-1
2. Screw .....................(B1) x4
3. Screw .....................(B2) x1
3 Key Switch/LCD 1. Flexible PWB......... (C1) x2 10-2
4 Mechanism Unit 1. Flexible PWB......... (D1) x2 10-2
2. Raise the rear part, and ..... 10-3
remove in the arrow direction.
5 Main PWB 1. Flat cable................(E1) x1 10-2
2. Screw .....................(E2) x2
6 Audio PWB
1.
Screw ......................(F1) x3 10-4
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.
REMOVAL
PROCEDURE
STEP
FIGURE
Figu re 10-1
Figure 10-2
Figure 10-3
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.
Mechanism Unit
Figure 10-4
Open Lever
Bottom
Cabinet
LCD
Key Switch
Top Cabinet
(A1)x2
ø1.4x2mm
(A1)x2
ø1.4x2mm
(A1)x2
ø1.4x2mm
(A1)x1
ø1.4x2mm
(B1)x2
ø1.4x2mm
(B2)x1
ø1.4x2mm
(B1)x2
ø1.4x2mm
OpenOpen
(C2)x2
pull
pull
pull
pull
pull
pull
pull
pull
LCD
(D1)x1
Main
PWB
(E2)x2
ø1.7x2.5mm
Audio
PWB
Mechanism
Unit
(E1)x1
Key Switch
Put the fold on the connector, and
apply with the felt. Sagging may
result in contact with the sheet metal.
Felt
(D1)x1*
Flexible PWB
for optical pickup
(F1)x3
ø1.7x2.5mm
Audio PWB
Page 11
MD-MT20/20C/20W
– 11 –
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.
Figure 11-5
Figure 11-1
Figure 11-2
Figure 11-3
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.
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.)
Figure 11-4
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.)
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.)
(A2)x3
ø1.4x2.8mm
MD Mechanism
Spindle Motor
(A1)x1
Mechanism Flexible
PWB Solder joint
(C1)x1
Stop Washer
MD Mechanism
Sled Motor
(C3)x2
ø1.4x1.2mm
(C2)x1
Drive Gear
(C4)x2
Mechanism Flexible
PWB Solder Joint
(D3)x2
Solder joint
(D1)x1
ø1.4x1.5mm
(D1)x1
ø1.2x1.6mm
(D1)x2
ø1.4x2.2mm
Magnetic Head
MD Mechanism
(D2)x2
Spring Washer
(E1)x1
ø1.7x3mm
Guide Shaft
Optical
Pickup Unit
MD Mechanism
Thrust Plate Spring
(B2)x1
ø1.4x1.5mm
(B3)x1
ø1.4x5.5mm
MD Mechanism
Remove the
solder joint
(B1)x2
Head Up/Down
Motor
Page 12
MD-MT20/20C/20W
– 12 –
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 ]
(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).
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
ADJUSTMENT
Test disc
MD adjustment needs two types of disc, namely recording disc (low reflection disc) and playback-only disc (high
reflection disc).
Type
Test disc
Parts No.
Note: Use the low reflection disc on which music has been recorded.
EEPROM version
Destination
Leaving the TEST mode
(1) Press the STOP button in the TEST mode stop state or version indicating state or whole LCD lighting state.
Test Mode
Microcomputer version
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.
1. AUTO 1 Mode • Perform preliminary automatic adjustment.
• If the combination of mechanism and pickup
PWB has been changed, be sure to start from
AUTO1.
2. AUTO 2 Mode
• Perform ATT (attenuator) automatic adjustment.
• Perform continuous playback (error rate display,
jump test)
3. TEST-PLAY Mode
• Continuous playback from the specified address
is performed.
• 1 line, 10 lines or 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.
4. TEST-REC Mode
• Continuous record from the specified address
is performed.
• Change of record laser output(servo gain is also
changed according to laser output).
• The temperature correction is performed only
when servo start is performed, but the posture
correction is not performed during continuous
recording.
5. MANUAL 1 Mode
• Temperature is displayed. (Updating in real time)
• Seeing the displayed adjustment value, perform
preliminary manual adjustment.
(Error rate indication, jump test)
6. MANUAL 2 Mode
• 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
• The value adjusted in AUTO1 or MANUAL1 is
indicated.
• (Execution in servo "OFF" state").
8. RESULT 2 Mode
• The value adjusted in AUTO 2 or MANUAL 2 is
indicated.
• Adjustment value is changed manually.
(error rate display, jump test).
9. DIGITAL INPUT Mode
• Digital input information is displayed.
10. ERROR INFORMATION
• Error information is displayed.
Mode • Error information is initialized
11. NORMAL Mode
• The mode is changed from the TEST mode to
the normal mode without adjustment.
• In the normal mode the internal operation mode,
memory capacity, etc. areindicated.
• In the normal mode both temperature correction
and posture correction are perfomed.
12. EEPROM Mode
• 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)
13. INNER Mode
• 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.
Page 13
MD-MT20/20C/20W
– 13 –
Operation in each TEST mode
1. AUTO1 Mode
• When the STOP button is pressed while the AUTO1 menu appears or during automatic adjustment, the mode changes to the TEST mode
stop state. At this time the adjustment value is not output.
• Be sure to adjust, using the specified disc MMD-213A 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.
0032 — 03C0 — 0700 — 08A0 — 0950— 0032 —
When the PLAY button is pressed while a target address is displayed, continuous playback is performed after searching that address.
• Each time the MODE button is pressed while the TEST-PLAY mode target address is displayed, the digit which is changed by pressing the
SKIP UP/DOWN button is changed as follows.
0032 — 0032 — 0032 — 0032 —
• 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.
1 — 10 — 384 — 1
* 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
Continuous playback (SUBQ address indication) [ S Q ]
|
Continuous playback (C1 error indication) [ C E ]
|
Continuous playback (SUBQ address indication) [ S Q ]
* Recordabl disk
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.
Page 14
MD-MT20/20C/20W
– 14 –
5. NORMAL Mode
• When the STOP button is pressed while the NORMAL menu appears, the mode changes to the TEST mode stop state.
• Indication during operation
Indication of memory capacity on main unit LCD [ ] + Level meter
: Internal mode
: Address (Cluster section)
: Address (Sector section)
• Selection of sound volume, BASS, etc. is possible (without indication)
• Recording is also possible.
• If the STOP button is pressed during operation in the NORMAL mode, the NORMAL mode is canceled, and the power is turned off.
6. Error data display Mode
• Reversing when 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.
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
Page 15
MD-MT20/20C/20W
– 15 –
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 . ]
EEPROM version (f ~ Z)
Microcomputer ROM version
(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).
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
Temperature
correction
+ 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
Center
temperature
Ambient
temperature
Temperature
correction
Center
temperature
- 9oC ~ +10oC 08h + 0.5oC
+ 3oC ~ +21oC 07h + 12.5oC
+15oC ~ +33oC 06h + 23.6oC
+26oC ~ +43oC 05h + 35.0oC
X
Page 16
MD-MT20/20C/20W
– 16 –
EEPROM DATA LIST (EEPROM version f)
TEMP setting
Item display Set values
T M _ _ Calculate values
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
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
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
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
Fucus setting
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
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
Spindle setting
Page 17
MD-MT20/20C/20W
– 17 –
: 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
Page 18
MD-MT20/20C/20W
– 18 –
: 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
Page 19
MD-MT20/20C/20W
– 19 –
: 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.
Page 20
MD-MT20/20C/20W
– 20 –
: 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
Page 21
MD-MT20/20C/20W
– 21 –
: 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.
Page 22
MD-MT20/20C/20W
– 22 –
: 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.
Page 23
MD-MT20/20C/20W
– 23 –
: 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
Page 24
MD-MT20/20C/20W
– 24 –
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.
Page 25
MD-MT20/20C/20W
– 25 –
SW401 EJECT OFF—ON
SW402 HOLD OFF—ON
SW403 DISC LID OPEN OFF—ON
SW902 DISC PROTECT OFF—ON
NOTES ON SCHEMA TIC DIAGRAM
• Resistor:
To differentiate the units of resistors, such symbol as K and
M are used: the symbol K means 1000 ohm and the symbol
M means 1000 kohm and the resistor without any symbol is
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.
• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means 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
• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chassis with no signal given.
• Parts marked with “ ” ( ) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.
POSITION
REF. NO
DESCRIPTION
Figure 25 TYPES OF TRANSISTOR AND DIODE
1SS372
2SA17457
2SC4213 B
RN1103
TOP
VIEW
TOP VIEW
SB10015 C
TOP VIEW
B
(G)
(3)
E
(S)
1
C
(D)
(2)
1SS361
TOP VIEW
1SS360
TOP VIEW
SBE803
2SA1873 GR
TOP VIEW
Page 26
MD-MT20/20C/20W
– 26 –
PIN
NO.
VOLTAGE
1
2
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
100
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
IC401
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
1
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
Preform the measurement on
the IC401 pin 37 in the TEST
mode with GND short-circuited.
(LCD is in "TEST" state.)
PIN
NO.
VOLTAGE
IC101
0.72V
0.72V
0.72V
0.72V
1.24V
1.24V
0.71V
1.24V
1.24V
1.24V
1.24V
1.24V
2.5V
2.5V
0.18V
2.5V
2.5V
0V
0V
1.48V
2.35V
0V
0V
2.5V
1.24V
1.24V
1.24V
1.24V
1.24V
1V
1.24V
1.24V
1.24V
NC
1.25V
1.25V
0.17V
1.24V
1.24V
1.24V
1.24V
2.5V
0V
0V
1.24V
1.24V
1.24V
0V
IC201
1V 0V 0V
IC501
2.5V 0V
IC701
IC821
1.25V
IC841
NC
IC202
IC351
IC402
IC871
IC702
IC354
IC353
IC601
IC651
IC703
IC771
IC801
IC802
IC901
3
1
2
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
3
100
1
2
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
3
1
2
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
3
1
2
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
3
2
4
5
3
1
2
4
5
6
7
8
9
10
11
12
3
1
2
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
3
1
2
4
5
6
7
8
3
1
2
4
5
3
1
2
4
5
3
1
2
4
5
3
1
2
4
5
6
7
8
9
10
9
10
11
12
13
14
3
1
2
4
5
3
1
2
4
5
6
7
8
3
1
2
4
5
6
3
1
2
4
5
6
7
8
3
1
2
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
3
1
2
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
3
1
2
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
3
1
2
4
5
6
3
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
0.49V
1.44V
1.13V
2.56V
0.6V
1V
1V
0.8V
0.8V
0.8V
0V
2.13V
1.4V
0.51V
0.51V
1.56V
1.1V
1.75V
2.57V
1.74V
1.61V
0V
1.93V
1V
0.91V
0V
0V
0V
0V
2V
0V
0V
0V
0V
0.14V
2V
0V
0.9V
0.9V
1.66V
1V
2V
0V
1V
1V
2V
0V
0V
0V
0V
0V
2V
0V
2V
1V
2V
0V
0V
1V
2V
2V
0V
2.36V
0.2V
1.65V
0V
0.1V
0.7V
1.35V
1.76V
0.32V
2.27V
2.36V
0.2V
2.5V
0V
2.35V
NC
0.18V
0V
0.23V
0V
2.23V
2.12V
2.04V
2.25V
2.35V
0.18V
0V
0V
0V
2.35V
0.2V
2.35V
2.26V
0.14V
1.6V
0V
0.08V
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
1.6V
1.26V
1.7V
0.27V
0V
0V
2.1V
2.72V
2.72V
2.35V
0V
2.34V
0V
2.35V
0V
2.35V
2.35V
0V
0V
2.35V
0V
0V
0V
–
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
2.5V
0V
0V
0V
0V
0V
0V
1V
1V
1V
0V
0V
2.5V
0V
0V
0V
0V
0V
0V
0V
0V
2.5V
2.5V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
–2.48V
0V
0V
2.72V
0.86V
0V
0V
0V
0.94V
1.16V
1.15V
1.13V
0V
0.54V
4.49V
0V
0.41V
1V
1V
1.28V
1.63V
2.57V
1.76V
1.44V
1.44V
0.6V
0.6V
0.6V
2.56V
0.6V
1V
1V
1V
0V
0V
4.42V
0V
0V
0V
9.66V
2.34V
NC
4.46V
4.64V
4.48V
NC
0V
4.63V
4.42V
0V
0.9V
–
–
0V
0V
0V
2.74V
–
–
0V
0V
–
–
2.74V
2.34V
0V
–
–
0V
0V
0.26V
2.34V
4.42V
0V
0.9V
4.42V
0V
4.46V
1V
1.8V
1.9V
1.7V
1.7V
0V
0V
0V
4.72V
0V
0V
0V
0V
0V
0V
0V
0V
4.72V
0V
0V
0V
4.72V
4.72V
0V
0V
0V
4.72V
0V
0V
2.5V
9.67V
2.74V
NC
0V
0V
0V
0V
–
NC
–
NC
0V
0V
0V
0V
0V
0V
2.74V
2.74V
NC
2.5V
0V
0.2V
0V
0V
0.73V
0.73V
0V
–
2.44V
2V
0V
2.48V
0.67V
0V
2.35V
0V
2.5V
0V
0V
0V
0V
0V
0V
0V
0V
0V
4.49V
4.64V
0V
2.34V
5V
5V
0.7V
5V
5V
5V
0V
0V
0.97V
0V
0V
0V
0V
1V
2.35V
0V
4.72V
0V
0V
0V
4.72V
4.72V
0V
0V
2.34V
0V
0V
0V
–2.87V
0V
0V
2.74V
0.85V
0V
0V
0V
PIN
NO.
VOLTAGE
IC431
1
2
4
3
2.34V
2.34V
NC
0V
PIN
NO.
VOLTAGE
IC805
1
2
4
5
6
7
8
3
2.15V
1.38V
–
–2.86V
0V
0V
–1.49V
2.73V
PIN
NO.
VOLTAGE
IC806
1
2
4
5
6
3
0V
0V
4.44V
0V
0V
0V
PIN
NO.
VOLTAGE
IC807
1
2
4
5
6
3
2V
1.98V
1.98V
0V
0V
0.94V
PIN
NO.
VOLTAGE
IC808
1
2
4
5
6
3
2.15V
0.56V
0.56V
0V
0.56V
2.74V
PIN
NO.
VOLTAGE
1
IC851
NC
2
4
5
3
1.16V
0V
1.17V
2.33V
PIN
NO.
VOLTAGE
1
IC872
4.64V
2
4
3
4.64V
NC
0V
VOLTAGE
Page 27
MD-MT20/20C/20W
– 27 –
Figure 27 BLOCK DIAGRAM
IC651
HEAD UP/DOWN
DRIVER
LB1930M
VCC VS
IC351
HEAD DRIVER
74ACT02T
VCC VEE
2.8V
UP CONVERTER
IC871
S8324A28
IC872
S80813LN
CHARGING CIRCUIT
IC803 FDT439N
IC805 NJM022V
IC806 NDC631N
IC807 RN4904
IC808 HN1C01FU
M903
HEAD
UP/DOWN
MOTOR
IC841
XC62HS02
2.35V REGULATOR
IC821
IR3M09N
DC/DC
CONVERTER
IC501
AD/DA CONVERTER
AK4519VF
M902
SLED
MOTOR
IC101
SIGNAL
PROCESSOR
IR3R55
2.5V REGULATOR
IC771 62GR2522
2.5V
REGULATOR
IC820
62FP2502
IC401
SYSTEM
MICROCOMPUTER
IX0298AW
RIPPLE
FILTER
VCC VEE
IC702
62GR4522
4.5V
REGULATOR
OPIC
LASER
PICK
HEAD
M901
SPINDLE
MOTOR
IC201
ENCODE/DECODE/
SERVO ATRAC
LR37811
+2.7V
+2.5V
T F
+2.5V
+2.7V
+2.7V
VDD
+2.0V
+2.7V
–2.7V
AVCC
+2.5V
+7~+10V
+2.5V
J703
HEADPHONES
LINE
J703
REMOTE
CONTROL
IC802 FDC634P
IC801 HN1C01FU
OVER VOLTAGE
REVERSE CONNECTION
PROTECTION CIRCUIT
J801
DC IN JACK
(4~5.5V)
1.7~3.4V
+2.35V
LCD UNIT
KEY OPERATION UNIT
IC901
SPINDLE MOTOR
DRIVER
BA6966FV
IC703
AUDIO AMP.
IR3R54N
IC701
AUDIO AMP.
IR3R54N
IC601
4CH PWM DRIVER
MPC17A39
VM
IC402
EEPROM
S29L294A
+4.5V
VCC
VS
IC202
IX2567AF
4MBIT D-RAM
+2.5V
+4.5V
OPTICAL IN
UNIT
J701
OPTICAL IN
J701
LINE IN
J702
MIC IN
(READY FOR
PLUG/IN
POWER)
2.0V
REGULATOR
IC200
62FP2002
1, 3, 4, 5,
6,19,20
17
16
35
VCC VG
13
24,26
29,31
6,8
5,9,10,14
23,27,28,32
13,14
24,42
40
3
26-29,
32-37,
39-46
1-9,
11-19
14
8,11
4
1
7,9 3,4
57,66
74
15
6
19
5
20 17
20
17
10
6
24 L-CH
22 R-CH
19
Q721
3
1,13
1-2
2,15-17,
19-22
6-9
1-12
1-3
14-16
52,
69,
70,
83,
84
9,
11,
13,
42
82 74
2
2
17-24
50
31
5
3
5
2
8
5
8
52,53
10
+2.7V
82-84,86,
89-100
62
3
3
4
2
1,2,23,24,14
2
7
3
NC
SW402
HOLD
SW902
DISC
PROTECT
55
92
4
SW401
EJECT
SW403
DISC LID
OPEN
97
98
73
12
PLAYBACK SIGNAL
RECORD SIGNAL
+B
F871
T0.5A L 63V
M
M
M
IC354
CPH5608
HEAD DRIVER
IC353
FTD2005
HEAD DRIVER
3
1
36
Q873
NDS332P
FETIC
Ni - MH Battery
or
Dry Battery
(2 pieces)
+2.7V
+2.7V
1, 20-30, 73, 93-95
R-CH
L-CH
2
R-CH
3
L-CH
3
VCC
L-CH
5
18
R-CH
Page 28
MD-MT20/20C/20W
– 28 –
• The numbers 1 to 18 are waveform numbers shown in page 36.
A
B
C
D
E
F
G
H
1
23456
Figure 28 SCHEMATIC DIAGRAM (1/3)
• NOTES ON SCHEMATIC DIAGRAM can be found on page 25.
P28
P29 P30
L921
100mA
TP665
L206
100mA
L205
100mA
L202
100mA
L201
100mA
CK105
C209
22P(CH)
IC354
CPH5608
5
4
3
2
1
D351
SBE803
5
4
3
2
1
R414
1K
R413
1K
TP408
R415
1K
R
1
R412
10K
TP409
TP407
TP413
R422
100K
R461
100K
D431
1SS361
C431
0.47
R431
330K
IC
S
E
S
8
2
1
IC353
FTD2005
8
7
6
5
4 3 2 1
C361
0.039
C351
56P(CH)
R361
15
TP351
R351
5.6
C357
0.1
IC351
HEAD DRIVER
74ACT02T
11
10
9
8
7
6
5
4
3
2
1
C354
0.1
C353
10/6.3
Q901
RN1113
R920
100K
R403
1K
R600
56
IC651
HEAD UP/DOWN
DRIVER
LB1930M
10
9
8
7
6
5
4
3
2
1
C200
1
TP664
TP666
CN601
16
9
8
7
6
5
4 3 2 1
TP212
C204
0.47
TP187
TP204
TP602
TP901
R922
100K
R921
330
TP400
TP412
TP202
C651
1
C622
0.1
C602
1
C601
1
L602
4.7µH
L601
4.7µH
C610
1
C609
1
C608
1
TP601
L608
4.7µH
L609
4.7µH
L610
4.7µH
IC601
4CH PWM DRIVER
MPC17A39
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
TP207
SW402
HOLD
R601
56K
C605
0.1
TP610
C600
22/6.3
L600
2.2µH
TP417
TP416
CK106
TP151
R404
100K
R222
1M
XL201
33.868MHz
C211
5P(CH)
C212
5P(CH)
CK207
L209
100mA
L203
100mA
R207
680
L204
100mA
TP203
CK224
CK222
L603
4.7µH
L604
4.7µH
C603
1
C604
1
XL401
4.19MHz
R408
100K
R407
10K
TP404
TP403
L171
10µH
C171
100/6.3
C130
0.1
C112
0.033
TP206
R106
56K
TP145
C207
0.1
C203
0.1
R204
1K
TP116
TP117
TP120
CN101
9
8
7
6
5
4 3 2 1
TP122
TP121
TP111
TP118
TP110
TP114
TP103
TP108
TP102
TP106
TP109
TP101
TP105
TP115
TP119
TP663
TP662
TP661
TP660
TP659
TP658
TP657
TP656
TP655
TP654
TP653
TP652
TP651
C122
270P
(CH)
C121
270P
(CH)
C124
390P
C123
390P
R105
390K
TP209
TP210
CK201
CK202
CK203
CK206
CK205
CK204
R206
270K
C205
0.1
R205
330K
C165
0.033
R161
1.2K
C903
3.3
R906
270K
R905
100K
C910
0.033
C908
0.22
C906
0.0022
C909
0.033
C905
0.0022
C907
0.0022
IC901
SPINDLE MOTOR
DRIVER
BA6966FV
11
10
9
8
7
6
5
4
3
2
1
R902
1
R901
1
R904
33K
C911
0.1
R903
330
R907
180K
R908
100K
R909
10K
C902
0.01
C103
1
TP144
IC401
SYSTEM
MICROCOMPU
T
IX0298AWZ
Z
C100
10/6.3
L100
10µH
TP139
R154
1.2K
CK101
C161
1
TP100
R103
22K
R104
22K
CK104
C102
1
C111
0.0033
IC101
RF SIGNAL
PROCESSOR
IR3R55
48
4
40
35
34
33
32
31
30
29
28
27
26
25
24
9
8
7
6
5
4
3
2
1
IC201
ENCODE/
DECODE/SERVO
ATRAC
LR37811
1
00
76
10
9
8
7
6
5
4 3 2 1
CK112
TP201
TP208
C110
0.22
C201
1
R102
22K
R101
22K
CK103
C106
0.22
CK102
C109
1
C107
0.012
C104
0.027
Q101
2SA17457
CK107
TP131
TP130
TP133
CK108
TP132
DSPRST
PCNT1
SYD0
SYD1
SYD2
SYD3
SYD4
SYD5
SYD6
SYWR
SYRD
SYRS
SYD7
DSPDAT
DSPSTB
DSPSCK
VCCLASER
VCCHEAD
SPVM
SL-
SL+
T+T-F-
F+
VCCPWM
VCCPU
VCCRF
ELON
AUDATA
PBAULT
HREC
EFMO
DISCPR
PDCNT
INNSW
LDCNT2
LDCNT1
X176KO
X176KO
SLDRF
SLDRR
TRDRF
TRDRR
FODRR
FODRF
DCNT1
SPDRF
SPDRR
EFMO
INNSW
SPIN
HDON
RFLAT
OPICGA
LDON
INPGCK
INPGIN
MCPGIN
PBMUTE
BEEP
AUSCLK
RCAULT
RCPCNT
VCCENDEC
LDCNT1
LDCNT2
SYRS
SYRD
SYWR
SYD7
SYD6
SYD5
SYD4
SYD3
SYD2
SYD1
SYD0
DINT
CIN
SENSE
FOK
SPDRR
SPDRF
SLDRR
SLDRF
TRDRR
TRDRF
FODRR
FODRF
XRT
AUDATA
AUSCLK
RFLAT
TEMP
LDON
LDVAR
OPICGA
_LCDRST
PLVGIN
PLVON
SCKO
P32
_DCEXT
_ELON
GND
VCC
D1
S
G1
G2
D2
D2S1G2
S2
D1
G1S2S1
G
I1
VCC
I2
G
O1
O2
RI4
FI4
FI3
RI3
VD4
FO4
PGND
RO4
VD4
VD3
RO3
PGND
FO3
VD3
GND
LG
VC
VG
RI2
FI2
FI1
RI1
VD2
FO2
PGND
RO2
VD2
VD1
RO1
PGND
FO1
VD1
OE
PS
CLK
AGND
JPNP
EXTAL
VCC
_STBY
_NMI
MD2
WDTOVF
MD1
MD0
BUZOUT
VSS
RCPCNT
VSS
VSS
EEPD
V
D
O
U
MAIN PWB-A1
UOUT
VM
VOUT
WOUT RF
RIB
STBY
BRK+
BRK- CSL2
CSL1
CST
COM
WIN
VIN
UIN
FG
VCC
GND
T+
T-
F+
F-
PCNT1
PBOPON
RCLAT
PBLAT
RADAT
RACLK
RFLAT
OPICGA
EFMO
TCRS
RAA3
RAA2
RAA1
RAA0
RAA4
RAA5
RAA6
RAA7
RAA8
RAOEX
RACASX
RAD2
RAD3
VDD2
DGND
RAA9
RARASX
RAWEX
RAD1
RAD0
VDD1
DGND
AVCC
EFMI
DGND
VDD1
VDD1
DGND
BIN
EIN
FIN
AIN
AGND
TCG
SPDRR
SPDRF
SLDRR
SLDRF
TRDRR
TRDRF
X176KO
TEST2
FODRF
FODRR
TEST0
TEST1
WBI
VBAT
SYRDX
SYWRX
SYSD7
SYSD6
SYSD5
SYSD4
SYSD3
SYSD2
SYSD1
SYSD0
RSTX
DINTX
MCCK
COUT
SENSE
FOK
SFSY
SBSY
SBO
SBCK
TEMON
TOTMON
X700KO
LDCNT2
EMPH1
OPTCNT
DAPON
ADPON
VXI
VPD
X1I
X1O
DIN
DOUT
VDD3
DGND
LRCK
BCLK
DFCK
ADDATA
DADATA
FEMON
SYRS
PLCK
ACRCER
RAA10
LDCNT1
LOGIC
LPF HPF
R
and
SW
DIFF
DIFF
EFM
AGC
ADIP
AGC
BIAS
RF1
RF2
RF3
RF4
REFI
REFO
RFADD
TCGI
AIN
BIN
EIN
FIN
BIAS
AVCC
STBY
DISC
SGAIN
AGND
DGND
DTEMP
LATCH
CLOCK
DATA
DVCC
FOUT
EOUT
BOUT
AOUT
TCGO
WBO
22KI
22KO
ADLPFO
ADIPO
ADIPI
ADAGC
ADAG
RF2-1
EFMO
EFMI
AVCC
AGND
EFMAGC
EFMAGI
TTR
GOUT
ROUT
EFMMON
T-
F+
T+
F-
INPGCK
_INPGI
_MCPGI
TEST1
TEST0
_KHOLD
_REC
DSPSCK
DSPDAT
DSPSTB
D
D
S
C
_RESET
VCC
XTAL
INNSW
LDON
SYRS
_SYRD
_SYWR
SYD7
SYD6
SYD5
SYD4
SYD3
SYD2
SYD1
SYD0
EEPK
_EPCS
MECHANISM FLEXIBLE
PWB ASS'Y
V
U
W
COM
-
-
+
+
HEAD
M901
SPINDLE
MOTOR
M903
HEAD UP/
DOWN
MOTOR
M902
SLED
MOTOR
M
M
M
OPIC
VCC
MP/R
B
A
LDON
COM
CVCC
VCC
DGND
DGND
LDVAR
AGND
E
F
T-
F+
T+
F-
RF2
RF4
RF3
RF1
10
11
12
+B
+B
+B
+B
+B
+B
+B
17
16
15
14
13
2
18
3
4
1
11
10
9
+B
12
1
2
3
4
32
1
+8
PH901
PHOTE
INTERRUPER
+B
+B
+B
IC353:IC354
HEAD DRIVER
SW902
DISC PROTECT
PLAYBACK SIGNAL
RECORD SIGNAL
OPTICAL PICKUP UNIT
FLEXBLE
PWB
1
16
FLEXIBLE
PWB
IC351
IC901
IC601
47 464544
43 42 41 393837
36
23
22
21
20
19
18
17
13
141516
10 11
12
13
14 15 16 17 18 19
20 21
22
10 11
12
13
14 15 16 17 1819 20
21 22
1 9
8
7
6
5
4 3 2
12
13
14
15
14
13
12 11
10
12
13
14
15
16
17
18
19
20
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
99
11
12 13
14
15
16 17 18 19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52 53
54
55 56 57 58
59 60
61 62 63 64
65
66 67 68 69
70
71 72 73 74 75
9
10
11
12 13
14
15 16 17
18 19
20
21 22 23 24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56 5758 59 60
61
62 63
64 65
66
67
6
Page 29
MD-MT20/20C/20W
– 29 –
7
8 9 10 11 12
Figure 29 SCHEMATIC DIAGRAM (2/3)
P28
P29 P30
TP064B
TP070B
TP086B
TP087B
TP088B
C507
10/6 3
C505
1000P
C506
1000P
TP082
TP089
TP087
TP085
TP084
TP083
TP080
TP079
TP078
TP086
TP093
TP092
TP091
TP090
TP073
TP063
TP064
TP065
TP066
TP067
TP068
TP069
TP070
TP062
TP061
TP077
TP076
TP075
TP074
TP072
TP071
CN702
9
8
7
6
5
4
3
2
1
TP088
R467
18K
Q461
2SC4738 GR
L206
100mA
L205
100mA
L202
100mA
L201
100mA
R279
100
R277
39K
C827
22/6.3
R460
68K
R833
47
C834
0.1
D831
1SS372
C831
0.1
C832
0.1
9
(
CH)
TP418
TP483
TP489
TP488
TP486
TP487
TP482
TP481
C481
1
C482
1
CN482
9
8
7
6
5
4
3
2
1
IC808 CHARGING CIRCUIT
HN1C01FU
6
5
4
3
2
1
C877
1
R466
560K
C866
1
R851
10K
C851
150P
(CH)
IC85
1
2.35
V
REG
U
TC7
S
3
2
1
TP786
TP788
TP789
TP787
TP785
TP783
TP780
TP779
TP793
TP792
TP791
TP790
TP761
TP775
TP774
TP771
TP770
TP769
TP768
TP767
TP765
TP764
TP763
CN701
9
8
7
6
5
4
3
2
1
TP782
TP777
C454
0.0022
R462
100K
R464
100K
R414
1K
R413
1K
TP408
R415
1K
IC402
EEPROM
S29L294A
R411
100K
R412
10K
TP411
TP409
TP407
TP410
TP413
R458
56K
R457
18K
R456
8.2K
R455
5.6K
R453
18K
R452
8.2K
R451
5.6K
TP460
CN451
9
8
7
6
5
4
3
2
1
TP453
TP452
TP451
TP461
TP454
TP455
TP456
TP457
TP458
TP459
TP462
TP463
R422
100K
R461
100K
R463
100K
D461
RB731U
6
5
4 3
2
1
D431
1SS361
C431
0.47
R431
330K
IC431
SESET
S80820LN
4
3
2
1
IC202
4MBIT D-RAM
IX2567AF
9
8
7
6
5
4
3
2
1
D861
EP10LA03
C863
1
C865
1
L862
100µH
C869
47/6.3
TP405
IC820
2.5V REGULATOR
62FP2502
C820
1
R803
100K
R465
100K
R426
22K
IC200
2.0V REGULATOR
62FP2002
C200
1
R202
33
IC702
4.5V REGULATOR
62GR4522
5
4 3
2
1
L822
10µH
C826
1
R823
100K
R828
220K
C825
4P(CH)
R829
33K
6
5
4
3
2
1
R827
300K
R826
10K
R821
100K
C830
1000P
R832
10M
C822
56P(CH)
D821
EC30LA02
C821
220/4
C810
0.33
R811
180K
R810
180K
IC82
2
CPH
3
TP811
TP414
C202
47/6.3
TP212
TP204
TP400
TP412
TP202
TP207
SW402
HOLD
0
22/6.3
L600
2.2µH
TP417
TP416
TP406
R406
100K
R405
10K
TP205
R222
1M
XL201
33.868MHz
C211
5P(CH)
C212
5P(CH)
CK207
L209
100mA
L203
100mA
R207
680
L204
100mA
TP203
CK224
CK222
C401
0.1
XL401
4.19MHz
R425
22K
R424
22K
R423
22K
R408
100K
R407
10K
TP404
TP403
TP415
TP402
TP401
TP206
C207
0.1
203
.1
04
09
10
01
02
03
06
05
4
R206
270K
C205
0.1
R205
330K
IC401
SYSTEM
MICROCOMPUTER
IX0298AWZZ
1
00
1
C100
10/6.3
L100
10µH
IC201
ENCODE/
DECODE/SERVO
ATRAC
LR37811
1
00
76
10
9
8
7
6
5
4 3 2 1
TP201
TP208
C201
1
TP200
VCCVG
DSPRST
DSPSTB
DSPSCK
DSPDAT
DSPRST
VCC4.5
RPLAY
RESET
PBMUTE
BEEP
RCAULT
AUSCLK
AUDATA
PBAULT
INPGCK
INPGIN
MCPGIN
ELON
RKEY
RDATA
EMPH0
RPLAY
PCNT1
SYD0
SYD1
SYD2
SYD3
SYD4
SYD5
SYD6
SYWR
SYRD
SYRS
SYD7
DSPDAT
DSPSTB
DSPSCK
CIN
HKEY2
HREC
HSTOP
HPLAY
HKEY1
VCCRF
VCC2.5
VCC2.7X
BATON
BATINCK
PCNT2
TEMP
PLVDCI
PLVDRY
RESET
BATINCK
BATON
RCPCNT
ELON
PCNT2
DINT
AUDATA
PBAULT
HREC
HPLAY
HSTOP
VCC2.7
PCNT1
PLVDCI
PLVDRY
BCLK
LRCK
DAPON
ADPON
DIN
DFCK
ADDATA
OPTCNT
EMPH1
DADATA
DCNT1
DISCPR
SPIN
X176KO
RKEY
EFMO
INNSW
PDCNT
HDON
LDVAR
RFLAT
OPICGA
LDON
INPGCK
INPGIN
MCPGIN
EMPH0
PBMUTE
BEEP
AUSCLK
RCAULT
RCPCNT
HKEY2
HKEY1
VCCENDEC
VCCDRAM
SENSE
FOK
XRT
LDCNT1
LDCNT2
SPDRR
SPDRF
SLDRR
SLDRF
TRDRR
TRDRF
FODRR
FODRF
_LCDRST
OPEN
DCNT1M
NIHEXT
BAT0FF
CHGCNT
PLVGIN
PLVON
SCKO
P32
CHGON
GND
_DCEXT
I/O1
I/O2
WE
RAS
A9
A0
A1
A2
A3
VCC
A5
A6
A7
A8
OE
CAS
I/O3
I/O4
GND
_ARQK
_ELON
SPWDS
PCNT1
O
S
EAIN+
DB
EAIN-
VREF
PWM
GND
EAOUT
PCNT2
JPNP
VDD
VSS
VSS
EXTAL
VCC
_STBY
_NMI
MD2
WDTOVF
MD1
MD0
BUZOUT
VSS
RCPCNT
VSS
VSS
EEPD
VSS
VDD
OUT
PCNT1
PBOPON
RCLAT
PBLAT
RADAT
RACLK
RFLAT
OPICGA
RMDAT
PLVBAT
PLVDCI
MCMON
EFMO
TCRS
RAA3
RAA2
RAA1
RAA0
RAA4
RAA5
RAA6
RAA7
RAA8
RAOEX
RACASX
RAD2
RAD3
VDD2
DGND
RAA9
RARASX
RAWEX
RAD1
RAD0
VDD1
DGND
AVCC
EFMI
DGND
VDD1
VDD1
DGND
BIN
EIN
FIN
AIN
AGND
TCG
SPDRR
SPDRF
SLDRR
SLDRF
TRDRR
TRDRF
X176KO
TEST2
FODRF
FODRR
TEST0
TEST1
WBI
VBAT
SYRDX
SYWRX
SYSD7
SYSD6
SYSD5
SYSD4
SYSD3
SYSD2
SYSD1
SYSD0
RSTX
DINTX
MCCK
COUT
SENSE
FOK
SFSY
SBSY
SBO
SBCK
TEMON
TOTMON
X700KO
LDCNT2
EMPH1
OPTCNT
DAPON
ADPON
VXI
VPD
X1I
X1O
DIN
DOUT
VDD3
DGND
LRCK
BCLK
DFCK
ADDATA
DADATA
FEMON
SYRS
PLCK
ACRCER
RAA10
LDCNT1
EFMMON
CKSTP
PDCNT
INPGCK
_INPGI
_MCPGI
TEST1
TEST0
_KHOLD
_STOP
_REC
_PLAY
_RPLAY
DSPSCK
DSPDAT
DSPSTB
HDON
DISCPR
_EJSW
_ARQD
PRTCT
GND DODI
SK
CS VCC
NC
RKEY
AVCC
_FOK
SENSE
_DINT
CIN
SPIN
_RESET
VCC
XTAL
EMPH0
INNSW
VSS
LDON
SYRS
_SYRD
_SYWR
SYD7
SYD6
SYD5
SYD4
SYD3
SYD2
SYD1
SYD0
_XRST
EEPK
_EPCS
AVSS
Vref
LDVAR
TEMP
HKEY2
HKEY1
ELON
RDATA
RPLAY
RKEY
PBMUTE
AUDATA
PBAULT
BEEP
RCAULT
AUSCLK
RESET
MCPGIN
INPGCK
INPGIN
EMPH0
AUDIO
PWB-A2
GND
P-MODE
ENTER
DISPLY
VOL DOWN
VOL UP
BASS
EDIT
REC
SKIP DOW
N
SKIP UP
STOP
PLAY
+B
1
11
+B
+B
12
2
3
1
2
3
1
1
2
3
4
5
6
7
8
+B
+B
+B
+B
+B
+B
+B
+B
+B
33 33
1
1
FLAT CABLE
(243)
15
3
G
+B
+B
9
8
7
6
5
4
3
2
1
IC802: IC
8
OVER V
O
CONNEC
T
CIRCUIT
IC402
IC702
IC808
IC821
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
99
11
12 13
14
15
16 17 18 19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52 53
54
55 56 57 58
59 60
61 62 63 64
65
66 67 68 69
70
71 72 73 74 75
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
51
52
53
54
55
56 5758 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
10
11
A4
12
13
14
15
16
17
18
19
20
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
11
12
13
14
9
8
7
6
5
4
3
2
1
11
12
13
14
Page 30
MD-MT20/20C/20W
– 30 –
• The numbers 1 to 18 are waveform numbers shown in page 36.
A
B
C
D
E
F
G
H
1
23456
Figure 30 SCHEMATIC DIAGRAM (3/3)
• NOTES ON SCHEMATIC DIAGRAM can be found on page 25.
P28
P30
P29
TP064B
TP070B
TP086B
TP087B
TP088B
TP721B
L451
150mA
C776
1000P
L500
47µH
C452
1000P
L456
100mA
L452
100mA
TP729
L453
100mA
TP500
C504
3.3/10
C503
3.3/10
C511
1
C500
10/6.3
C508
1
C762
2.2
C761
2.2
R500
4.7
C507
10/6.3
C505
1000P
C506
1000P
IC501
AD/DA
CONVERTER
AK4519VF
9
8
7
6
5
4 3 2 1
R501
470
C509
2.2
R502
470
C510
2.2
C501
0.0022/50
C502
0.0022/50
C773
0.22
C774
1
IC771
2.5V REGULATOR
62 GR2522
5
4 3
2
1
R710
56
SW401
EJECT
4
3
2
1
SW403
DISC LID
OPEN
4
3
2
1
L771
100µH
C771
47/6.3
TP082
TP089
TP087
TP085
TP084
TP083
TP080
TP079
TP078
TP086
TP093
TP092
TP091
TP090
TP073
TP063
TP064
TP065
TP066
TP067
TP068
TP069
TP070
TP062
TP061
TP077
TP076
TP075
TP074
TP072
TP071
CN702
9
8
7
6
5
4
3
2
1
TP088
C723
1000P
R767
1K
TP721
C712
100P
(CH)
TP703
Q711
RN1444 A
TP714
C731
0.22
C711
100P
(CH)
R727
8.2K
TP722
R726
39K
R728
1K
J703
REMOTE CONTROL/
HEADPHONES
8
7
6
5
4
3
2
1
C726
3.3/10
C725
3.3/10
R723
6.8K
R724
6.8K
L751
22uH
C765
0.22
TP723
R769
15K
R770
15K
R717
1K
R768
1K
TP705
C701
10/6.3
L752
22uH
IC701
AUDIO
AMP.
IR3R54N
9
8
7
6
5
4 3
2
1
R763
68
C752
0.082
R713
10K
TP708
C735
1000P
C713
1
C703
0.01
C757
0.68
R725
100
R764
68
TP728
C758
3.3/10
C755
0.01
C753
1
R715
100K
TP724
Q721
2SC4213 B
TP726
C766
0.22
TP709
TP725
R716
100K
TP701
C715
0.1
C760
0.027
TP702
TP707
C722
3.3/10
R754
270K
R757
27K
R720
8.2K
R719
8.2K
R712
5.6K
R711
5.6K
C754
1
R729
2.7K
R730
2.7K
L714
100mA
C759
0.027
TP704
J701
OPTICAL/
LINE IN
9
8
7
6
5
4
3
2
1
TP727
C714
1
L454
100mA
C756
0.68
C720
1000P
R701
100
R762
4.3K
R761
4.3K
R703
120K
J702
MICIN
4
3
2
1
L704
100mA
L703
100mA
D492
15AZ7.5Y
R765
D494
15AZ7.5Y
L712
100mA
R492
1K
L702
100mA
C751
0.082
R766
R714
10K
C491
0.1
R753
120K
C721
3.3/10
C702
10/6.3
R756
27K
TP711
TP713
C724
1000P
TP712
L711
100mA
L713
100mA
R702
100
C734
0.1
C733
0.1
L719
0.47uH
C719
10/10
IC703
AUDIO AMP.
IR3R54N
9
8
7
6
5
4
3 2 1
R467
18K
Q461
2SC4738 GR
R806
1K
R279
100
R277
39K
C827
22/6.3
F871
T0.5A L 63V
R460
68K
C876
1
R833
47
C834
0.1
D831
1SS372
C831
0.1
C832
0.1
D803 1SS382
REVERSE
CONNECTION
4
3 2
1
R802
1K
TP483
TP489
TP488
TP486
TP487
TP482
TP481
C481
1
C482
1
CN482
9
8
7
6
5
4
3
2
1
IC808 CHARGING CIRCUIT
HN1C01FU
6
5
4
3
2
1
R278
2.2K
R853
100
C258
0.0047
R254
2.2K
Q874
RN1113
C877
1
C866
1
R852
47K
R851
10K
C851
150P
(CH)
C852
1
IC851
2.35V
REGULATOR
TC7S14FU
5
4
3
2
1
Q255
RN1113
IC807
RN4904
6
5
4 3
2
1
R276
3.3K
R265
22K
R275
56K
Q251
RN1113
R263
100K
R274
75K
C256
0.1
R267
75K
R264
18K
R266
100K
R256
18K
R258
180K
R260
3.3M
R273
56K
Q254
RN1113
C250
0.1
R253
75K
R252
150K
C871
0.47
TP786
TP788
TP789
TP787
TP785
TP783
TP780
TP779
TP793
TP792
TP791
TP790
TP761
TP775
TP774
TP771
TP770
TP769
TP768
TP767
TP765
TP764
TP763
CN701
9
8
7
6
5
4
3
2
1
TP782
TP777
R871
10K
IC872
S80813LN
4
3 2
1
IC871
S8324A28
5
4 3
2
1
L871
47µH
D812
SB10015C
IC803
FDT439N
CHARGING
CIRCUIT
TP809
R257
100K
R458
56K
R457
18K
R456
8.2K
R455
5.6K
R453
18K
R452
8.2K
R451
5.6K
TP460
CN451
9
8
7
6
5
4
3
2
1
TP453
TP452
TP451
TP461
TP454
TP455
TP456
TP457
TP458
TP459
TP462
TP463
J801
DC IN
3
2
1
TP802
TP801
L887
TIP IMPEDER
L888
TIP IMPEDER
R815
56K
IC802
FDC634P
6
5
4
3 2 1
R816
24K
C801
0.1
TP800
R808
5.6K
IC801
HN1C01FU
6
5
4 3
2
1
D800
1SS360
R807
680
D802
015Z5.1Y
R800
22K
R801
2.2K
C800
1
R809
2.2K
TP805
D801
SB10015C
C805
100/6.3
C806
3.3
TP803
TP804
R804
1.0A
Q253
RN1113
TP808
D861
EP10LA03
C863
1
C865
1
L862
100µH
C869
47/6.3
R250
1
R251
1
IC806
NDC631N
6
5
4 3
2
1
R259
82K
Q252
2SC4738GR
R268
2.2K
C255
0.1
C254
0.1
R255
0.2M
R262
24K
R261
270K
C253
0.1
IC805
NJM022V
8
7
6
5
4 3 2 1
R271
1K
R269
100
R270
100
R465
100K
D871
EP10LA03
C875
0.1
C874
15/10
C841
10/6.3
IC841
2.35V REGULATOR
XC62HS02
5
4 3
2
1
IC702
4.5V REGULATOR
62GR4522
5
4 3
2
1
L822
10µH
C826
1
R878
100K
Q873
NDS332P
D822
1SS389
R831
100K
C829
0.01
C823
390P
L821
4.7µH
R823
100K
R828
220K
R824
15K
C825
4P(CH)
R829
33K
C828
1
IC821
DC/DC
CONVERTER
IR3M09N
9
8
7
6
5
4
3
2
1
R827
300K
R826
10K
R821
100K
C830
1000P
R832
10M
C822
56P(CH)
C824
560P
D821
EC30LA02
C821
220/4
C810
0.33
R811
180K
R810
180K
IC822
CPH3403
TP811
VCC11
VCCVG
DSPRST
DSPSTB
DSPSCK
DSPDAT
VCCPOWER
VCC4.5
RPLAY
RESET
PBMUTE
BEEP
RCAULT
AUSCLK
AUDATA
PBAULT
INPGCK
INPGIN
MCPGIN
ELON
RKEY
EMPH0
VCC12
VCC3
Y2
C
OP
AY
Y1
VCC2
VCC1
VCC4
GND1
VCC2.7X
VCC13
VCC2.7
MICOM2.35V
PCNT1
PLVDCI
PLVDRY
DC JACK
VCC
GND
OUT
VDD
VSS
O - +
+ - O
V-
V+
G
D D
D S S
PCNT1
OSCOUT
OSCIN
EAIN+
DB
EAIN-
VREF
OSC
ROSC
STATE
PWM
VCC
OUT
GND
EAOUT
RDATA
EMPH0
RESET
ELON
RDATA
RPLAY
RKEY
PBMUTE
AUDATA
PBAULT
BEEP
RCAULT
AUSCLK
RESET
MCPGIN
INPGCK
INPGIN
EMPH0
RKEY
RPLAY
MCPGIN
INPGIN
INPGCK
PBMUTE
RCAULT
BEEP
PBAULT
AUDATA
AUSCLK
AUDIO
PWB-A2
VB
VCML
VCMR
VRAD
VRDA
AINR
AINL
VA
AGND
LRCK
SCLK
SDTI
SDTO
MCLK
DEM0
DEM1
VD
DGND
PWDA
PWAD
CMODE
AOUTL
AOUTR
VCOM
Vout
GND
VCC
GND
R
L
PLAY
KEY
R-ch
L-ch
R-ch
L-ch
R-ch
L-ch
VEE
VCC
DGND
ROUT
LOUT
RIHP
LIHP
AGND
RI LI
VEE
LI
RI
AGND
LIHP
RIHP
DGND
VCC
LOUT
ROUT
LCD ASS'Y
LCD
DRIVER
LCD
GND
P-MODE
ENTER
DISPLY
VOL DOWN
VOL UP
BASS
EDIT
REC
SKIP DOWN
SKIP UP
STOP
PLAY
+B
+B
+B
+B
+B
33 33
1
1
FLAT CABLE
(243)
BATTERY
TERMINAL
SW801
Ni-MH
BATTERY
DETECTION
D
G
S
3
2
1
+B
6 7 8
15
3
2
1
2
1
3
IC805,IC806,IC807
CHARGING CIRCUIT
2
3
1
!
3
2
1
G
D
S
+B
S
G
D
9
8
7
6
5
4
3
2
1
KEY SWITCH
FLEXIBLE
PWB ASS'Y
1
2
3
RIPPLE
FILTER
IC801
2.8V UP CONVERTER
FET IC
SW801
IC802: IC802
OVER VOLTAGE REVERSE
CONNECTION PROTECTION
CIRCUIT
2.8V UP CONVERTER
IC501
IC702
IC808
IC821
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
10
11
12
10
11
12
13 14 15 16 17 18 19 20 21 22 23
24
11
12
13
14
9
8
7
6
5
4
3
2
1
11
12
13
14
10
11 12
13 14 15 16 17 18 19 20 21 22 23
24
10
11
12
13
14
15
16 17 18
19
20 21
22 23
24
R765:R766
MD-MT20W
18
MD-MT20/20C
8.2
Page 31
MD-MT20/20C/20W
– 31 –
A
B
C
D
E
F
G
H
1
23456
Figure 31 WIRING OF P.W.BOARD (1/5)
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
Page 32
MD-MT20/20C/20W
– 32 –
• The numbers 1 to 18 are waveform numbers shown in page 36.
: Through-hole where the top, bottom and +B patterns are connected.
: Through-hole where the top, bottom and hround patterns are connected.
: Through-hole where the top and bottom patterns are connected.
A
B
C
D
E
F
G
H
1
23456
Figure 32 WIRING OF P.W.BOARD (2/5)
TP106
TP205
TP110
TP105
C110
C109
C106
C111
TP100
TP102
TP101
CK112
C112
TP139
TP108
C107
TP114
TP200
IC202
TP404
TP109
R106
TP144
TP115
CK105
IC101
TP203
TP402
CN101
TP111
TP103
TP145
TP791
TP132
TP406
TP415
TP118
CK107
TP116
R406
TP418
TP809
TP117
TP131
TP206
CK108
TP405
TP808
TP787
TP414
TP133
CK106
R405
CK102
CK103
TP207
CK101
C401
TP130
CK104
TP411
TP122
TP151
Q101
TP121
C130
TP119
TP120
R154
IC402
TP351
C161
TP408
IC401
TP201
TP409
R908
R906
C903
R907
TP407
R905
C908
C902
R909
R413
C910
IC351
R903
TP901
R415
R411
C909
TP413
IC901
R414
R412
C906
TP659
TP658
TP452
TP187
TP662
C357
TP601
C810
R902
C907
R810
R811
TP651
TP663
TP410
TP416
TP417
C911
TP652
TP785
R901
R904
TP655
L921
TP602
TP654
TP811
C825
R827
R832
R921
TP653
R452
TP401
TP610
R422
R922
R853
TP656
TP489
R828
C822
R823
R826
C830
R829
R821
L601
C601
R851
C851
R852
D831
TP488
TP657
CN601
TP661
TP486
IC851
C832
C831
L602
C852
C828
TP660
IC821
C602
TP463
TP664
TP665
TP666
L603
C603
C482
C481
C824
C604
IC808
C829
R279
TP481
TP482
D822
L604
IC807
R831R824
R265
R273
Q254
Q251
R263
C823
R277
C250
R264
R253
R252
R278
R276
R259
R260
Q253
R261
TP804
C253
Q255
R275
R266
R262
R254
R271
R274
R267
R255
C258
C256
IC805
C254
C255
R269
TP803
R804
TP483
TP454
R456
TP453
R457
TP451
R455
TP456
TP458
CN482
CN451
R424
TP460
R426
TP461
R425
R453
TP457
TP805
R451
L888
TP487
R815
R816
C800
TP462
TP801
TP800
C801
TP802
L887
TP209
TP210
TP455
TP208
TP403
TP400
TP761
TP763
TP764
TP459
TP765
TP204
XL401
TP767
TP202
TP768
TP779
TP774
TP769
TP775
TP786
TP770
CN701
TP788
TP782
TP771
TP777
TP780
TP790
TP412
TP792
TP783
TP793
TP789
TP212
R458
64
3
1
46
31
16
15
10
5
1
14
8
1
5
7
10
14
5
8
C905
1
5
10
11
15
20
7
12
10
156
1
5
10
13
1
5
9
33
30
25
20
15
10
5
1
1
2345
6
7
89
10
20 191817
16
151413 12
11
SW402
HOLD
37
36
35
30
25
24 20
15
12
13
10
5
1
48
4540
22
1
5
10
15
20
1
2
3
To Key Switch Flexible Ass'y
P31 2-E
To LCD Ass'y
P31 5-E
Terminal, Battery
(237) /
13 1
9
1
54
1
3
1
22
1
16
Terminal, Battery
(233)
Terminal, Battery
(235)
1
1
TO AUDIO PWB
CN702
P34 3-A
MAIN PWB-A1 (BOTTOM VIEW)
FLAT CABLE
(243)
33
33
2
1
9
13
11
17
18
10
16
14
15
26 25
30
20
15
10
5
1
100
50
51
55
45
40 35
60
65
70
75
80
85 90
95
76
J801
8
5
1
4
J801
DC IN
To Optical Pickup Unit
P31 1-D
To Mechanism Flexible PWB
P31 6-D
Page 33
MD-MT20/20C/20W
– 33 –
7
8 9 10 11 12
Figure 33 WIRING OF P.W.BOARD (3/5)
R270
R258
R257
Q252
R256
SW801
R250
IC806
R251
D812
IC803
R268
L821
L822
C821
R600
C805
C622
C600
C651
L600
C605
C609
L609
C610
C826
C863
C834
R833
L862
C865
C869
C806
IC601
IC822
C608
L610
D821
C827
D861
L608
C431
C204
IC431
D431
R204
C203
Q873
R431
Q874
IC651
CK202
CK201
CK206
CK205
CK203
CK204
R601
R878
Q901
C361
L171
R466
C207
C124
C122
R920
R104
R361
R102
IC353
C123
C121
C351
R103
IC354
D351
R101
IC201
R205
C171
R206
C354
R351
C205
C353
R161
C165
CK224
CK222
IC820
R105
C104
C201
R803
R407
R408
R404
R403
C103
C102
C820
IC200
C100
L100
R202
C202
C200
R806
R423
L206
L205
R462
R800
R802
XL201
D803
C211
C212
R222
L202
R808
L203
L209
L201
IC801
CK207
L204
R207
C209
R463
R801
R807
D461
R465
D802
C454
R464
R461
R809
D800
R871
C871
IC872
D801
IC802
Q461
IC702
C877
C866
R467
R460
C875
IC871
C841
C874
IC841
D871
F871
T0.5A L 63V
C876
L871
1
2
3
6
4
5
G
D
S
1
5
10
15
18
19
20
25
30
35
36
8
5
1
4
1
2
3
12
5
4
4
5
3
2
1
3
1
56
10
G
S
D
3
3
3
3
2
2
2
2
1
1
1
3
3
3
2
2
2
1
1
1
1
445
5
4
4
4
4
4
5
5
5
6
6
1
2
3
4
S
G
D
3
1
2
1
5
10
15
20
25
26
30
35
40
45 50
51
55
60
65
70
75
76808590
95
100
3
2
1
4
5
6
MAIN PWB-A1 (TOP VIEW)
SW801
Ni-MH
BATTERY
DETECTION
12
3
4
Page 34
MD-MT20/20C/20W
– 34 –
Figure 34 WIRING OF P.W.BOARD (4/5)
A
B
C
D
E
F
G
H
1
23456
• The numbers 1 to 18 are waveform numbers shown in page 36.
: Through-hole where the top, bottom and +B patterns are connected.
: Through-hole where the top, bottom and hround patterns are connected.
: Through-hole where the top and bottom patterns are connected.
IC771
R764
C503
C504
L500
C500
C774
C766
C502
R502
L771
C771
C510
C723
C511
R763
R762
R770
R769
R761
C773
C501
R501
C765
C762
C508
SW401
EJECT
C509
IC501
R765
R767
R500
R768
L719
C757
C756
IC703
R766
C507
R726
C726
R757
R756
C506
C505
Q721
C719
C758
R710
Q711
C725
R725
R720
R712
C760
C759
C715
R717
R719
R711
R754
C753
C754
R730
R753
C755
R723
C711
SW403
DISC LID
OPEN
C722
L702
C752
C721
C491
L454
L453
C712
R729
C751
R724
C720
C724
L712
L713
L703
C731
D494
R703
R727
L456
C703
R728
R492
C701
C702
R702
L704
R714
R716
L714
C714
D492
CN702
L751
L752
C761
1
5
10
15
20
24
13
12
4
5
3
2
1
9
8
7
13
1520
24
1
5
10
12
3
2
1
4
3
2
1
4
33
33
33
6
J701
OPTICAL/
LINE IN
TO MAIN PWB
CN701
P32 2-B
7
8
6
5
AUDIO PWB-A2 (TOP VIEW)
FLAT
CABLE
(243)
2
1
3
4
5
1
1
1
510
1520
2530
Page 35
MD-MT20/20C/20W
– 35 –
7
8 9 10 11 12
Figure 35 WIRING OF P.W.BOARD (5/5)
R701
C452
C735
IC701
C734
C733
C776
L452
L711
3
4
8
7
2
1
5
6
J703
REMOTE
CONTOL/
HEADPHONES
J702
MIC
IN
1
2
24
3
4
1
5
10
12
13
15
20
TP701
TP702
TP711
TP713
TP712
TP714
TP091
TP086B
TP078
TP707
TP708
TP500
TP087B
TP088B
TP087
TP085
TP079
TP090
TP075
TP088
TP083
TP084
TP709
TP074
TP070B
TP089
TP072
TP070
TP067
TP071
TP073
TP724
TP722
TP729
TP721
TP723
TP725
TP721B
TP726
TP704
TP703
TP064B
TP705
TP077
TP068
TP066
TP062
TP064
TP061
TP728
TP727
TP063
TP065
TP076
TP093
TP092
TP082
TP086
TP080
TP069
L451
R715
R713
C713
AUDIO PWB-A2 (BOTTOM VIEW)
Page 36
MD-MT20/20C/20W
– 36 –
WAVEFORMS OF MD CIRCUIT
NORM:200kS / s
1994 / 12 / 15 22:54:19
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.00V
CH2 : 0.000V
Main : 10K
Zoom : 10K
CH3 : 0.00V
CH4 : 0.00V
=Trigger=
Mode : NORMAL
Type : EDGE CH4
Detay : 0.0ns
Hold OFF : MINIMUM
T
TP208
(FEOUT)
CK204
(FOK)
TP122
(F+)
CK205
(SENSE)
Stopped
CH1=1mV
DC 10:1
CH3=5V
DC 10:1
CH4=2V
DC 10:1 (50ms/div)
50ms/div
CH2=500mV
DC 10:1
T
1
4
3
2
1
2
3
4
NORM:100MS / s
1994 / 12 / 16 00:24:17
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.00V
CH2 : 0.00V
Main : 5K
Zoom : 5K
CH3 : 0.00V
CH4 : 0.00V
=Trigger=
Mode : AUTO
Type : EDGE CH3
Detay : 0.0ns
Hold OFF : MINIMUM
T
SDTi
MCLK
SCLK
LRCK
Stopped
CH1=2V
DC 10:1
CH3=2V
DC 10:1
CH4=2V
DC 10:1 (50us/div)
50us/div
CH2=2V
DC 10:1
T
1
4
3
2
5
6
7
8
ENV
1994 / 12 / 16 01:03:40
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.00V
CH2 : 0.00V
Main : 10K
Zoom : 10K
CH3 : 0.000V
CH4 : 0.00V
=Trigger=
Mode : NORMAL
Type : EDGE CH2
Detay : 0.0ns
Hold OFF : MINIMUM
T
TP201
(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
ENV
1994 / 12 / 15 23:31:21
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.00V
CH2 : 0.00V
Main : 10K
Zoom : 10K
CH3 : 0.00V
CH4 : 0.00V
=Trigger=
Mode : NORMAL
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM
T
SPDRR
TP601
(VM)
Stopped
CH1=2V
DC 10:1 (50ms/div)
50ms/div
CH2=2V
DC 10:1
T
1
2
12
13
FULL 20MHz
BandwidthONSmooth
OFF
1994 / 12 / 18 09:26:46
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.00V
CH2 : 0.00V
Main : 10K
Zoom : 10K
CH3 : 0.00V
CH4 : 0.00V
=Trigger=
Mode : AUTO
Type : EDGE CH2
Detay : 0.0ns
Hold OFF : MINIMUM
T
TP208
(FEOUT)
TP210
(TEOUT)
TP656
(SL+)
TP657
(SL-)
Stopped
CH1=2V
DC 10:1
CH3=2V
DC 10:1
CH4=2V
DC 10:1 (1s/div)
1s/div
CH2=2V
DC 10:1
1
4
3
2
ENV
1
10
14
15
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 08:57:26
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.00V
CH2 : 0.00V
Main : 10K
Zoom : 10K
CH3 : 0.000V
CH4 : 0.0V
=Trigger=
Mode : NORMAL
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM
T
TP201
(EFM)
TP210
(TEOUT)
TP209
(TOTAL)
Stopped
CH1=2V
DC 10:1 (2ms/div)
2ms/div
CH2=2V
DC 10:1
1
2
ENV
T
CH3=500mV
DC 10:1
9
10
11
1994 / 12 / 15 09:58:45
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.00V
CH2 : 0.00V
Main : 10K
Zoom : 10K
CH3 : 0.00V
CH4 : 0.00V
=Trigger=
Mode : AUTO
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM
T
TP208
(FEOUT)
TP210
(TEOUT
)
SPDRR
TP601
(VM)
Stopped
CH1=2V
DC 10:1
CH3=2V
DC 10:1
CH4=2V
DC 10:1 (1s/div)
1s/div
CH2=2V
DC 10:1
1
3
4
2
ENV
1
10
12
13
1994 / 12 / 15 08:39:46
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.00V
CH2 : 0.00V
Main : 10K
Zoom : 10K
CH3 : 0.00V
CH4 : 0.0V
=Trigger=
Mode : AUTO
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM
T
TP210
(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
1994 / 12 / 15 21:54:52
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.00V
CH2 : 0.00V
Main : 10K
Zoom : 10K
CH3 : 0.00V
CH4 : 0.00V
=Trigger=
Mode : NORMAL
Type : EDGE CH2
Detay : 0.0ns
Hold OFF : MINIMUM
T
T
TP201
(EFM)
TP210
(TEOUT)
TP121
(T-)
Stopped
CH1=2V
DC 10:1
CH3=1V
DC 10:1
CH4=1V
DC 10:1 (500us/div)
500us/div
CH2=2V
DC 10:1
1
3
4
2
ENV
9
10
18
For TP208, TP209, and TP210, use the specific LPF, and
observe the waveform.
When watching the EEM monitor (TP201)
Set MSL from 00H to 80H with EEPROM control setting. After
completion restore 00H.
1994 / 12 / 15 09:10:03
=Filter= =Offset= =Record Length=
Smoothiing : OFF
BW : FULL
CH1 : 0.000V
CH2 : 0.00V
Main : 4K
Zoom : 4K
CH3 : 0.000V
CH4 : 0.0V
=Trigger=
Mode : NORMAL
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM
T
CK105
(HPFO)
CK108
(WBO)
Stopped
CH1=500mV
DC 10:1 (20us/div)
20us/div
CH2=2V
DC 10:1
1
2
ENV
16
17
1000P
10K
TP
Measurement
Page 37
MD-MT20/20C/20W
– 37 –
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?
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".
No
Yes
Does the display operate normally?
Is playback state set?
Yes
Perform the check stated in item "Playback state connot be
set".
No
Is audio output normal?
Yes
Perform the check stated in item "Audio playback circuit".
No
Is recording/playback operation normal?
Yes
Perform the check stated in item "Recording/playback
operation".
No
• Power is not turned on when the / button is
pressed.
No
No
Yes
Check the periphery of remote controller and main unit
headphone terminal (J703) and IC401.
No
Is the pin 55 of IC401 in H state? (TP404)
Is operation normal when the main body button is pressed?
Check the position of Hold switch.
Is power turned on when the remote control button is
pressed?
No
Does the pin 66 of IC401 oscillate? (TP400)
Replace XL401.
Yes
Page 38
MD-MT20/20C/20W
– 38 –
Yes
Check whether there is defective solder joint of audio signal
line between IC703 and J703
No
Yes
Is audio wavefrom output from J703 pins 3 and 4.
Check the pins 5 and 6 of IC703.
No
Yes
Is audio wavefrom output from IC703 pins 18 and 19.
Check IC201 pins 70 to 72, pin 74 and IC501 pins 9, 10, 11,
15
No
• Abnormal display
No
Yes
Are the pin 4 (VCC) and pin 5 (GND) normal?
Is waveform output from IC401 pins 9,11,13?
Is waveform output from CN482 pins 6 to 8?
• Playback state cannot be set
Is initialization performed normally in case of high- reflection
disc playback?
Yes
Check between IC401 and
CN482.
No
Check the periphery of IC401.
Does the playback time display advance?
Yes
Position check in INNER mode
Check IC201 and IC202 connection line.
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?).
Check the lead-in photointerrupter, mechanical flex
PWB soldering and CN601 connection.
No
Ia an attempt to repeat repeatedly the TOC part performed
on the low-reflection disc?
Yes
No
No
Replace the disc.
No
• Audio playback clrcult
When it has been ascertained that the address up to cluster address is normal in the TEST mode.
Yes
Is audio wavefrom output from IC501 pins 19 and 20?
Check headphones jack,and periphery of headphone.
Although the playback time display is acting., no sound is given during playback in the normal mode.
Check for pattern breakage of flexible PWB, check for
defects of display microcomputer (replace the display unit).
Page 39
MD-MT20/20C/20W
– 39 –
• The spindle motor fails to run.Does the head move
No
Does the waveform appear on the IC201 pins 24 and 25 after
TEST mode AUTO2 completion and in this state?
Check the IC201 periphery.
Yes
Does waveform appear on the IC601 pin 13?
Does waveform appear on IC901 pins 1, 19 and 20?
Replace the spindle motor.
Yes
No
L608, IC201, IC901, CN601 and flex, etc. soldering check
No
Replace. IC601
Yes
• Recording/playback operation
Insert a low reflection disc, and ascertain audio output by normal playback, and then set TEST REC mode.
Yes
Does the head move down, failing to start record even
when the continuous record mode is set after address?
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.
No
Does the RF waveform of TP201 appear when playback is
Does level of pins 86 of IC401 and pin 17 of IC101 change
depending on record and playback?
Is RF pattern output from IC201 pin 50?
Yes
No
Check for soldering failure of IC201 .
No
Check periphery of IC401 and IC101.
Check whether there is any damage in IC101, periphery of
laser diode.
Yes
Check for defects of IC351 in head drive flexible PWB,head,
flexible PWB.
No
Yes
Is audio monitor output given in normal mode LINE IN
record?
Check waveforms of pins 9 to 12 of IC501, pins 70 to 73 of
IC201.
Is waveform obtained on IC501 pins 3 and 6?
No
Yes
Check whether the pin 7 of IC501 and the pin 59 of IC201 are in
H state.
No
No
Does voltage on the IC701 pins 13 to 15 change in case of
record VOLUME UP/DOWN?
Is audio waveform observed on the pins 18 and 19 of
IC703?
Yes
Check whether input waveform is observed on the pins 5
and 6 of IC703.
Yes
Page 40
MD-MT20/20C/20W
– 40 –
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
IC401 RH-iX0298AWZZ: System Microcomputer (IX0298AW) (1/3)
FUNCTION TABLE OF IC
Pin No.
FunctionPort Name Terminal Name
Input/Output
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Page 41
MD-MT20/20C/20W
– 41 –
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
IC401 RH-iX0298AWZZ: System Microcomputer (IX0298AW) (2/3)
Pin No.
FunctionPort Name Terminal Name
Input/Output
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Page 42
MD-MT20/20C/20W
– 42 –
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
System LSI expansion output port (6th generation: LR37811)
Pin No.
Function
Port Name
Terminal Name Input/Output
Remarks
H H Normal mode
H L No adjustment mode
L H Test mode
L L (Settings prohibited)
TEST1
Details
*1: List of TEST port settings
H H fs=32K: 'ON'
H L fs=48K: 'ON'
L H OFF
L L fs=44.1K: 'ON'
EMPH1 EMPH0
Details
*2: List of EMPH port settings
H H Brake
H L Drive UP
L H Drive DOWN
L L Output OFF
LDCNT1 LDCNT0
Details
*3: List of LDCNT port settings
TEST0
IC401 RH-iX0298AWZZ: System Microcomputer (IX0298AW) (3/3)
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.
CIRCUIT DESCRIPTION
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.
Page 43
MD-MT20/20C/20W
– 43 –
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.
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.
Power supply change
When one of the power supplies is selected, the port settings are as follows:
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)
Port name
When operating from the AC adaptor
When operating from the battery
The port settings in the power-off mode are as follows:
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
Port name
When operating from the AC adaptor
When operating from the battery
When charging
R278
2.2K
C258
0.0047
R254
2.2K
R256
18K
R258
180K
R260
3.3M
R273
56K
Q254
RN1113
C250
0.1
R253
75K
R252
150K
D812
SB10015C
IC803
FDT439N
CHARGING
CIRCUIT
R257
100K
TP803
TP804
R804
1.0A
Q253
RN1113
TP808
R250
1
R251
1
IC806
NDC631N
6
5
4 3
2
1
R259
82K
Q252
2SC4738 GR
C254
0.1
R255
0.2M
R262
24K
R261
270K
C253
0.1
IC805
NJM022V
8
7
6
5
R270
100
VCC3
VCC4
GND1
O - +
+
-
O
V-
V+
G
D D
D S S
BATTERY
TERMINAL
SW801
Ni-MH
BATTERY
DETECTION
D
G
S
3
2
1
3
2
1
Reference voltage
input section
NFB loop
Resistor to
detect the
charging
current
Page 44
MD-MT20/20C/20W
– 44 –
–– MEMO ––
Page 45
MD-MT20/20C/20W
PARTS GUIDE
NOTE:
Parts marked with “ ” are important for maintaining the safety of the set.
Be sure to replace parts with specified ones for maintaining the safety and performance of the set.
MODEL
MD-MT20(S)
MD-MT20C(S)
MD-MT20W(BL)
MD-MT20W(GL)
MD-MT20W(S)
“HOW TO ORDER REPLACEMENT PARTS”
To have your order filled promptly and correctly, please furnish the
following information.
1. MODEL NUMBER 2. REF. No.
3. PART NO. 4. DESCRIPTION
MARK: SPARE PARTS-DELIVERY SECTION
For U.S.A. only
Contact your nearest SHARP Parts Distributor to order.
For location of SHARP Parts Distributor,
Please call Toll-Free;
1-800-BE-SHARP
Explanation of capacitors/resistors parts codes
Capacitors
VCC ....................... Ceramic type
VCK........................ Ceramic type
VCT........................ Semiconductor type
VC • • MF ............... Cylindrical type (without lead wire)
VC • • MN............... Cylindrical type (without lead wire)
VC • • TV................ Square type (without lead wire)
VC • • TQ ............... Square type (without lead wire)
VC • • CY ............... Square type (without lead wire)
VC • • CZ ............... Square type (without lead wire)
VC • • • • • • • • • J .. The 13th character represents capacity difference.
("J" ±5%, "K" ±10%, "M" ±20%, "N" ±30%,
"C" ±0.25 pF, "D" ±0.5 pF, "Z" +80-20%.)
If there are no indications for the electrolytic capacitors, error is ±20%.
Resistors
VRD ....................... Carbon-film type
VRS........................ Carbon-film type
VRN ....................... Metal-film type
VR • • MF ............... Cylindrical type (without lead wire)
VR • • MN............... Cylindrical type (without lead wire)
VR • • TV................ Square type (without lead wire)
VR • • TQ ............... Square type (without lead wire)
VR • • CY ............... Square type (without lead wire)
VR • • CZ ............... Square type (without lead wire)
VR • • • • • • • • • J .. The 13th character represents error.
("J" ±5%, "F" ±1%, "D" ±0.5%.)
If there are no indications for other parts, the resistors are ±5%
carbon-film type.
Page 46
PRICE
RANK
DESCRIPTIONNO.
PARTS CODE NO. PARTS CODE
PRICE
RANK
DESCRIPTION
MD-MT20/20C/20W
– 1 –
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,
LR37811
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,
IX0298AW
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
Connection Protection Circuit,
HN1C01FU
IC802 VHIFDC634P/-1 J AG Over Voltage Reverse Connec-
tion Protection Circuit,FDC634P
IC803 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
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
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
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
Page 47
NO.
PRICE
RANK
DESCRIPTIONPARTS CODE
NO. PARTS CODE
PRICE
RANK
DESCRIPTION
MD-MT20/20C/20W
– 2 –
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
RESISTORS
VRS-CY1JB000J J AA 0 ohm,Jumper,0.8×1.55mm,
Green
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
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,
1.0A
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
Page 48
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RANK
DESCRIPTIONNO.
PARTS CODE NO. PARTS CODE
PRICE
RANK
DESCRIPTION
MD-MT20/20C/20W
– 3 –
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
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/
Headphones
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
[Disc Lid Open]
SW801 QSW-M0006AWZZ J AD Switch,Push Type
[Ni-MH Battery Detection]
SW902(8-2) QSW-M0170AFZZ J AD Switch,Push Type [Disc Protect]
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
(Not Replacement Item)
8- 2(SW902) QSW-M0170AFZZ J AD Switch,Push Type [Disc Protect]
8- 3(PH901) VHPGP1S93K/-1 J AF 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
[Except for U.S.A.]
! 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
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 AA 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]
CABINET PARTS
201 GFTAT3004AWM1 J AW Top Cabinet Ass’y
[MD-MT20-S/20C-S/20W-S]
201 GFTAT3004AWM2 J AW Top Cabinet Ass’y
[MD-MT20W-BL]
201 GFTAT3004AWM3 J AW Top Cabinet Ass’y
[MD-MT20W-GL]
201- 1 ———— — Top Cabinet
(Not Replacement Item)
201- 2 ———— — Bracket,Top Cabinet
(Not Replacement Item)
202 HDECQ0480AWM1 J AM Decoration Plate Ass’y
202- 1 ———— — Plate,Decoration
(Not Replacement Item)
202- 2 PSHEZ0033AWZZ J AD Sheet,Decoration Plate
203 TCAUS0044AWZZ J AB Label A,Class 3B
[MD-MT20W Only]
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
[MD-MT20W Only]
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
[MD-MT20W-GL]
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,
Bottom Cabinet Sheet
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
[Except for MD-MT20W-BL]
241 GCABA1185AWSB J AF Front Cabinet [MD-MT20W-BL]
242 GCABB1185AWSA J AE Rear Cabinet
[Except for MD-MT20W-BL]
242 GCABB1185AWSB J AE Rear Cabinet [MD-MT20W-BL]
Page 49
NO.
PRICE
RANK
DESCRIPTIONPARTS CODE
NO. PARTS CODE
PRICE
RANK
DESCRIPTION
MD-MT20/20C/20W
– 4 –
243 QCNWN1478AWZZ J AG Flat Cable,33Pin
244 PSHEF0019AWZZ J AB Felt,Mechanism Flexible PWB
245 GDORB0001AWSA J AE Door,Battery [MD-MT20-S/
20C-S/20W-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
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
for Taiwan/Australia/
New Zealand/Hong Kong]
RADPA5403AFZZ J BF AC Adaptor
[MD-MT20W for Taiwan]
RADPA6435AFZZ J BG AC Adaptor [MD-MT20W for
Australia/New Zealand]
RADPA8493AFZZ J BH AC Adaptor [MD-MT20W for
Hong Kong]
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
Except for Australia/
New Zealand]
SPAKZ0487AWZZ J AD Pad,AC Adaptor [MD-MT20W for
Australia/New Zealand]
SPAKZ0490AWZZ J AC Pad,Operation Manual
[MD-MT20W for Australia/
New Zealand Only]
SPAKZ0518AWZZ J AB Sheet,Protect
SPAKZ0522AWZZ J AC Cushion,Protect
TCAUA0040AWZZ J AB Card,Taiwan Caution
[MD-MT20W for Taiwan Only]
TCAUH0050AWZZ J AB Caution,Headphones
[MD-MT20C Only]
TGANZ0022AW20 J AE Card,Taiwan Guarntee [MD-
MT20W-BL for Taiwan Only]
TGANZ0022AW21 J AE Card,Taiwan Guarntee [MD-
MT20W-GL for Taiwan Only]
TGANZ0022AW32 J Card,Taiwan Guarntee [MD-
MT20W-S for Taiwan Only]
TINSE0253AWZZ J AE Operation Manual [MD-MT20W
for Australia/New Zealand]
TINSK0093AWZZ J AG Operation Manual [MD-MT20C]
TINSZ0431AWZZ J AG Operation Manual [MD-MT20W
Except for Australia/
New Zealand]
TLABE0304AWZZ J AB Label,Bar Code [MD-MT20W-S
for Australia/New Zealand/
Taiwan Only]
TLABE0305AWZZ J AB Label,Bar Code [MD-MT20W-GL
for Australia/New Zealand/
Taiwan Only]
TLABE0306AWZZ J AB Label,Bar Code [MD-MT20W-BL
for Australia/New Zealand/
Taiwan Only]
TLABG0002AWZZ J AB Label,Hong Kong [MD-MT20W
for Hong Kong Only]
TLABH0055AWZZ J AF Sheet,E/C Comparision [MD-
MT20W for Taiwan Only]
TLABJ0009AWSA J AB Label,SHARP Corpration Japan
[MD-MT20W for Chile/Peru/
Bolivia Only]
TLABJ0010AWZZ J AB Label,Japan [MD-MT20W for
Chile/Peru/Bolivia Only]
TLABN0088AWZZ J AB Label,SER No. [Except for
Taiwan of MD-MT20W]
TLABN0092AWZZ J AB Label,SER No. [MD-MT20C/20W
for New Zealand]
TLABN0092AW02 J AB Label,SER No. [MD-MT20W
Except for Asia/Middle and
Near East/Africa/Australia/
New Zealand/Hong Kong]
TLABN0094AWZZ J AB Label,Taiwan SER.No. [MD-
MT20W for Taiwan Only]
TLABRF232AWZZ J AB Label,Bar Code [MD-MT20C]
TLABR1054AWZZ J AB Label,Bar Code [MD-MT20W-S
for Central South America/
Brazil/Chile/Peru/Bolivia Only]
TLABR1055AWZZ J AB Label,Bar Code [MD-MT20W-BL
for Central South America/
Brazil/Chile/Peru/Bolivia Only]
TLABR1056AWZZ J AB Label,Bar Code [MD-MT20W-GL
for Central South America/
Brazil/Chile/Peru/Bolivia Only]
TLABS0225AWZZ J AB Label,CPA [MD-MT20W for Asia/
Middle and Near East/Africa
Only]
TLABZ0589AWZZ J AB Label,Taiwan Impoter [MD-
MT20W-S for Taiwan Only]
TLABZ0590AWZZ J AB Label,Taiwan Impoter [MD-
MT20W-BL for Taiwan Only]
TLABZ0591AWZZ J AB Label,Taiwan Impoter [MD-
MT20W-GL for Taiwan Only]
TLABZ0600AWSA J AC Label,Made in Malaysia [MD-
MT20W for Australia/
New Zealand/Brazil Only]
TLABZ0618AWZZ J AB Label,Made in Malaysia [MD-
MT20W for Australia/New
Zealand/Taiwan/Brazil Only]
TLSTS0011AWZZ J AB Taiwan SS List
[MD-MT20W for Taiwan Only]
TSPC-0574AWZZ J AC Label,Taiwan Specifications
[MD-MT20W-S for Taiwan
Only]
TSPC-0576AWZZ J AC Label,Taiwan Specification [MD-
MT20W-BL for Taiwan Only]
TSPC-0577AWZZ J AC Label,Taiwan Specifications
[MD-MT20W-GL for Taiwan
Only]
UBAGC0001AWZZ J AK Battery Carrying Case
UBAGC0002AWSA J AK Carrying Case
UBATM0002AWSA J BC Battery,Rechargeable Nickel-
Metal Hydride
92LG-CARD1266E J AB Gurantee Card [MD-MT20W for
Australia/New Zealand Only]
92LPLUG155A J AG Adaptor,AC Plug [MD-MT20W
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
[MD-MT20 Only]
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-
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
(TEAC Test MD)
88GMMD-212 J BU Low Reflection Disc MMD-212
(TEAC Test MD)
88GMMD-213A J Low Reflection Disc MMD-213A
(TEAC Test MD)
Page 50
MD-MT20/20C/20W
A
B
C
D
E
F
G
H
1
23456
Figure 5 MD MECHANISM EXPLODED VIEW
– 5 –
M903
M902
M901
503x2
502x3
508x2
501x2
11
505
24
18
509
512
8-2
(SW902)
8-1
8
8-3(PH901)
507
503
507
9
19
15
1
2
14
16
13
511
510
21
504
12
503
5
3
10
23
17
4
22
20
6
7
506
Page 51
MD-MT20/20C/20W
A
B
C
D
E
F
G
H
1
23456
Figure 6 CABINET EXPLODED VIEW
– 6 –
MD MECHANISM
202-2
202-1
202
201
201-1
603x2
203
205
207
206
204
201-2
214
216x2
215
213
217
209
208
211
601
212
210
224
223
240
242
601
602
602
244
602x3
225
243
245
238
237
229x2
230
239
231
603x2
241
226
228
227
PWB-A2
PWB-A1
236
235
234
233
232
218
603x2
221
603x2
603x2 603
222
220
219
219
246
MD-MT20W Only
MD-MT20W Only
247
Page 52
MD-MT20/20C/20W
– 7 –
PACKING OF THE SET (MD-MT20 ONLY)
Setting position of switches and knobs
UNIT HOLD OFF
Remote Control HOLD CANCEL
A9907-3034NS•HA•M
SHARP CORPORATION
Communication Systems Group
Quality & Reliability Control Center
Higashihiroshima, Hiroshima 739-0192, Japan
Printed in Japan
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.
©
Battery Carrying
Case
Quick Guide
Optical Digital Cable
Operation Manual
Headphones Caution
Carying Case
TLABN0088AWZZ
SER No. Label
1
3
2
SPAKZ0522AWZZ
Protect Cushion
SPAKZ0518AWZZ
Protect Sheet
TLABR1051AWZZ
Bar Code Label
TLABN0092AWZZ
SER No. Label
SPAKC0809AWZZ
Packing Case
Rechargeable
Battery
Headphones
Connecting Cord
Remote Control
SPAKA0220AWZZ
Packing Add., Unit
Not Replacement Item
SPAKZ0485AWZZ
AC Adaptor Pad
AC Adaptor
SA • SC • SL • SZ • EX • LAG
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