Sharp MD-MT20H(BL) User manual

MD-MT20H/16E
– 1 –
CONTENTS Page
SAFETY PRECAUTION FOR SERVICE MANUAL ............................................................................................................... 2
SPECIFICATIONS ................................................................................................................................................................. 3
NAMES OF PARTS ............................................................................................................................................................... 4
OPERATION MANUAL (FOR MD-MT20H) ........................................................................................................................... 5
DISASSEMBLY...................................................................................................................................................................... 8
REMOVING AND REINSTALLING THE MAIN PARTS......................................................................................................... 9
ADJUSTMENT ...................................................................................................................................................................... 10
NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 23
TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 23
VOLTAGE ............................................................................................................................................................................ 24
BLOCK DIAGRAM ............................................................................................................................................................... 25
SCHEMATIC DIAGRAM ...................................................................................................................................................... 26
WIRING SIDE OF P.W.BOARD........................................................................................................................................... 29
WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 34
TROUBLE SHOOTING ........................................................................................................................................................ 35
FUNCTION TABLE OF IC.................................................................................................................................................... 38
CIRCUIT DESCRIPTION ..................................................................................................................................................... 40
PARTS GUIDE/EXPLODED VIEW
PACKING METHOD (MD-MT20H/MT16E FOR U.K. ONLY)
SERVICE MANUAL
SHARP CORPORATION
No. S5933MDMT20H/
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
MD-MT20H(BL)
MD-MT20H(GL)
MD-MT20H(S)
MD-MT16E(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-MT20H
Illustration: MD-MT16E
DIFFERENCE BETWEEN
MD-MT16E AND MD-MT20H
Optical Digital cable None Used
Remote Control None Used
Rechargeable Battery None Used
Battery Carrying Case None Used
AC Adapter None Used
AC Adapter Pad None Used
MD-MD16E
SECTION MD-MT20H

MD-MT20H/16E
– 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
outerthan thelead-in position,the Laserwill lightfor severalseconds todetect adisc. Donot lookinto thePickup 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-Useofcontrolsor adjustments, or performance ofproceduresotherthanthosespecified herein may result
in hazardous radiation exposure.
SAFETY PRECAUTION FOR SERVICE MANUAL
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 eyesagainst 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 docus access (2-3 seconds). (Fig. 2-1) During the operation, the laser will lesk from the
opening btween the magnetic head and the mechanical chassis (Fig. 2-2). In order to protect your eyes, you most not look
at the laser durnd repaor. Before repaoring be sure to disconnect the AC adaptor and remove the batteries.
(For U.K.)
(For Europe)
Laser Diode Properties
●Material: GaAlAs
●Wavelength: 785 nm
●Pulse time:
Read mode: 0.8 mW Continuous
Write mode: max 10 mW 0.5S
min cycle 1.5S
Repetition
VAROITUS! LAITTEEN KÄYTTÄMINEN MUULLA KUIN TÄSSÄ KÄYTTÖOHJEESSA
MAINITULLA TAVALLA SAATTAA ALTISTAA
KÄYTTÄJÄN TURVALLISUUSLUOKAN 1 YLITTÄVÄLLE
NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE.
VARNING - OM APPARATEN ANVÄNDS PÅ ANNAT SÄTT ÄN I DENNA BRUKSANVISNING
SPECIFICERAS. KAN ANVÄNDAREN UTSÄTTAS FÖR OSYNLIG LASERSTRÅLNING, SOM
ÖVERSKRIDER GRÄNSEN FÖR LASERKLASS 1.
LASER KLASSE 1
LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT
Magnet Head Lasar Beam
Optical Pick-Up
Main PWB
Spindle motor
Mechanism
Chassis
Magnet head
Optical pick-up Top Cabinet

MD-MT20H/16E
– 3 –
FORACOMPLETEDESCRIPTIONOFTHEOPERATIONOFTHISUNIT,PLEASEREFERTO
THE OPERATION MANUAL.
SPECIFICATIONS
Specifications for this model are subject to change without prior
notice
■General
Power source:
(MD-MT20H for U.K.) DC 2.4V: Rechargeable Nickel-Metal Hydride battery x 1
DC 5V: AC adaptor (AC 230 - 240V, 50/60 Hz)
DC 3.0V: Commercially available, “AA” size, alkaline bat-
tery x 2
DC 4.5V: Separately available car adaptor, AD-CA20X
(
for cars with a 12-24V DC negative earth electrical
system)
Power consumption: 7 W (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, alkaline batteries
Continuous recording:
Approx. 7.5 hours Continuous recording: Approx. 7.5hours
Continuous play:
Approx. 12 hours Continuous play: Approx. 15 hours
Power source:
(MD-MT20H for Europe) DC 2.4V: Rechargeable Nickel-Metal Hydride battery x 1
DC 5V: AC adaptor (AC 220 - 230V, 50/60 Hz)
DC 3.0V: Commercially available, “AA” size, alkaline bat-
tery x 2
DC 4.5V: Separately available car adaptor, AD-CA20X
(
for cars with a 12-24V DC negative earth electrical
system)
Power source:
(MD-MT16E) DC 2.4V: Optional RechargeableNickel-Metal Hydridebat-
tery (AD-T20BT) x 1
DC 3.0V: Commercially available, “AA” size, alkaline bat-
tery x 2
DC 4.5V: Optional car adaptor, AD-CA20X
(
for cars with a 12-24V DC negative earth electrical
system)
DC 5V: OptionalACadaptor (AD-T20APE, AC230-240V,
50/60 Hz)
Power consumption:
(MD-MT16E) 7 W (Optional AC adaptor)
Output power:
(MD-MT16E) RMS; 20 mW (10 mW + 10 mW)
(0.2% T.H.D.)
Charging time:
(MD-MT16E) Approx. 4 hours (90 %)
Approx. 6 hours (fully charged)
(When using the AC adaptor)
Battery life:
(MD-MT16E)
When using the optional re-
chargeable battery AD-T20BT
(fully charged)
When using two, commercially
available, high capacity, “AA”
size, 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: (MD-MT20H) 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(AdaptiveTransformAcousticCoding),24-bitcomputed
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:
Weight: (MD-MT16E) 180 g (0.40 lbs.) without battery

MD-MT20H/16E
– 4 –
NAMES OF PARTS
■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 InformationIndicator
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
■Remote control unit (MD-MT20H Only)
1. Earphones Socket
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
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
25
1
6
7
8
9
3
Illustration: MD-MT20H

MD-MT20H/16E
– 5 –
OPERATION MANUAL (FOR MD-MT20H)
POWER SOURCE
■ Rechargeable battery power
This unit can be used with the following power sources: a rechargeable battery, anAC adaptor, commercially available alkaline batteries, and a separately available car adaptor (AD-CA20X).
Whenthe rechargeablebattery isused forthe first time or when you want to use it after a longperiod ofdisuse,besuretochargeitfully. 1
Open the battery cover.
●Slide the battery cover as far as it will
go to the outside and then lift to open it.
Ifthebattery cover isliftedwithout 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 theAC adaptor into theAC socket,
andtheninsert the plugontheACadap- tor lead into the DC IN 5V socket.
5
Press the CHARGE button of the main
unit to begin charging. ●“ ” 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% complete.
●
To charge the battery fully, continue
charging for about 2 more hours. (Inthis case, youdonot need topress 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)
●Thebattery will notbecharged whenthe
power to the main unit is turned on.
●
Donotforceopenthebatterycovertoo wide.
●Do not use a rechargeable battery or an
AC adaptor other than those specified on page 3 (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 fora long period,theoperating time may be shorter than normal. The battery life will recover with normal use i.e. charg- ing and discharging.
●To avoid shortening the service life of the
battery only recharge the battery after in has been completely discharged.
1 2 4
3
5
AC 230-240V, 50/60 Hz
Insert securely, all the way in.
To the DC IN 5V socket
RECORDING USING THE OPTICAL DIGITAL CABLE
This is the method used for recording digi- talsignalsfromCDsor 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) Starttheplaybackontheequipment
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
equipmentsuchas Digital radios 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 willdropout 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. ●MiniDiscsare designed so that only first
generation digital copies can be made. Further digital copies are prevented by the SCMS (Serial Copy Management System).
Playback Digital cable
CD player, MD player, etc.
Digitally recorded MiniDisc
Analogue recording is possible.
Recording
Playback Digital cable Recording
MD player

MD-MT20H/16E
– 6 –
Ifthe holdfunction is active whilst thepower is turned off, the power cannot be turned on by mistake and the battery will not be accidentally drained.
CONVENIENT OPERATION OF THE UNIT
■Checking the remaining amount
of battery level
The remaining amount of battery level is shown by the battery indicator ( ) dur-
ing operation.
< How to read the battery indicator > ●Whenthebatteryiscompletelydischarged,
thebatteryindicatorwillflash.Rechargethe batteryorreplacethealkalinebatterieswith 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.
●WhentheACadaptorincludedwiththisunit
or a separately available car adaptor is used,thebatteryindicatorwillnotbeshown.
●The number of bars shown in the battery
indicator may increase or decrease, de- pendingontheoperationbeingperformed. 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). ●Whenthe unitis inthe holdmode, 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
Sincethe battery levelis 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
TROUBLESHOOTING
■Moisture condensation In the following cases, condensation may form inside the unit. ●Shortly after turning on a heater. ●Whenthe unitis 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
occur whilst recording or editing?
●Is the unit in the hold mode? ●Is an optical signal being output from the external
equipment? 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. Leavetheunit completelyunpoweredfor
approximately 30 seconds.
4. Plug the AC adaptor back into the AC
socket and retry the operation.
Ifstrangesounds, smell or smoke comeout 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.

MD-MT20H/16E
– 7 –
Whenthenumber 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 recordthe maximum number of trackson it. If there are scratches on a disc, the unit willautomaticallyavoidrecordinginthose areas.Therecordingtimewillbereduced. 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 minimumunitofrecording.So,evenifatrack is less than 2 seconds long, it will use about 2 seconds of space on the disc. Therefore, the time actually available for re- cordingmaybelessthantheremainingtime displayed. If there are scratches on discs, those sec- tionswillbeautomaticallyavoided(norecord- 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 soundsmaybeskippedwhilstcueingand reviewing. If there are scratches or dust on a MiniDisc,thetracknumbersfollowingthat 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 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 cor- rectlyduetovibrationorshockintheunit.
●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 OPEN 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. ●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.
●Thereis an error inthe recorded sig-
nal.
●Adiscwhichcontainsdataotherthan
music was played.
●There is an error in the signal from
the disc.
●Charge the rechargeable battery or
replacethe alkaline batteries (oruse the AC adaptor for power).
●Replace the disc with a recorded disc. ●Record using the analogue cable. ●Changethestop position of thetrack
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 re-
cordable disc.
●Connect the digital cable securely. ●Replace it with another recordable
disc.
●Return the HOLD switch to its origi-
nal 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.
●Movethe write protectionknob back
to its original position.
●Reload the disc or replace it.
●Replaceit withanotherrecordeddisc.
●Wait for a while and try the opera-
tion again.
●Tohave itrepaired, goto thedistribu-
tor 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 Remedy
BATT EMPTY
BLANK DISC
Can’t COPY
Can’t EDIT
Can’t REC
Can’t WRITE
DEFECT
Din UNLOCK
READ ERROR
DISC FULL
HOLD
LOCKED
LOCK ERROR
NO DISC
PB DISC
POWER ?
SORRY
SYSTEM ERR
TEMP OVER
TOC ERROR
TOC FULL
Tr. Protect
U TOC ERROR
? DISC
Meaning
PROTECTED

MD-MT20H/16E
– 8 –
1 Bottom Cabinet 1. Screw .....................(A1) x7 8-1
2 Top Cabinet 1. Open the Top cabinet. 8-1
2. Screw .....................(B1) x4
3. Screw .....................(B2) x1
3 Key Switch/LCD 1. Flexible PWB......... (C1) x2 8-2
4 Mechanism Unit 1. Flexible PWB......... (D1) x2 8-2
2. Raise the rear part, and remove 8-3
in the arrow direction.
5 Main PWB 1. Flat cable................(E1) x1 8-2
2. Screw .....................(E2) x2
6 Audio PWB 1. Screw ...................... (F1) x3 8-4
DISASSEMBLY
Cares before disassembling
When assembling the machine after disassembling or
repair, observe the following requirements so as to ensure
safety and performance.
1.Removethebatteriesfromthemachine,andtakeoutthe
mini-disc.
2. When assembling after repair, be sure to restore the
initial location of wires.
Sincethescrews are small, incorrect fixing mayresult in
malfunction.
3. When repairing, pay utmost attention to static electricity
of IC.
REMOVAL PROCEDURE
STEP FIGURE
Figu re 8-1
Figure 8-2
Figure 8-3
Caution:
Carefullyhandle themain PWBand flexible PWB.After removingthe
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 8-4
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

MD-MT20H/16E
– 9 –
REMOVING AND REINSTALLING THE MAIN PARTS
Removethemechanismaccordingtothedisassemblingmeth-
ods 1 to 4. (See Page 8.)
How to remove the spindle motor (See Fig. 9-1.)
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 9-5
Figure 9-1
Figure 9-2
Figure 9-3
How to reinstall the optical pickup unit
(See Fig. 9-5.)
1. Remove the screw (E1) x 1 pc.
2. Slowly raise the optical pickup.
How to remove the magnetic head (See Fig. 9-4.)
1. Remove the screws (D1) x4 which connects the magnetic
head to the head relay flexible PWB, remove the spring
washers(D2)x2 and remove the soldering joints (D3)x2.
Note:
Mount carefully so as not to damage the magnetic head.
(If the gear is damaged, noise is caused.)
Figure 9-4
How to remove the head up/down motor
(See Fig. 9-2.)
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. 9-3.)
1.Removethe stop washer(C1)x1pc., and removethedrive
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

MD-MT20H/16E
– 10 –
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
Holdingdownsimultaneously theVOLUME-DOWNButton andPLAYButton oftheset unitwithoutdisc, supplythepower fromtheDC INplug.
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.

MD-MT20H/16E
– 11 –
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.

MD-MT20H/16E
– 12 –
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

MD-MT20H/16E
– 13 –
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) Performtheoperationtodisplay"EEPROMSETTINGMODECHART",comparetheEEPROMDATALISTwiththe 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)Setthetemperaturereferencevaluebybuttonoperation,andcheckwhetherthetemperaturecodeindicationcorrespondsto"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

MD-MT20H/16E
– 14 –
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 _ D 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 9 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

MD-MT20H/16E
– 15 –
: 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

MD-MT20H/16E
– 16 –
: 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

MD-MT20H/16E
– 17 –
: 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.

MD-MT20H/16E
– 18 –
: 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

MD-MT20H/16E
– 19 –
: 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.

MD-MT20H/16E
– 20 –
: 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.