Sharp MD-MT20WS, MD-MT20WGL, MD-MT20WBL, MD-MT20CS, MD-MT20S Service Manual

MD-MT20/20C/20W

SERVICE MANUAL

No. S6943MDMT20//

MD-MT20(S)
MD-MT20C(S)
MD-MT20W(BL)
MD-MT20W(GL)

Illustration: MD-MT20/20C

MD-MT20W(S)

• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.

Illustration: MD-MT20W

CONTENTS

SAFETY PRECAUTION FOR SERVICE MANUAL (MD-MT20W ONLY).............................................................................. 2

SPECIFICATIONS ................................................................................................................................................................. 3

NAMES OF PARTS ............................................................................................................................................................... 4

OPERATION MANUAL .......................................................................................................................................................... 5

QUICK GUIDE (MD-MT20 ONLY) ......................................................................................................................................... 8

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

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

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

NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 25

TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 25

VOLTAGE ............................................................................................................................................................................ 26

BLOCK DIAGRAM ............................................................................................................................................................... 27

SCHEMATIC DIAGRAM ...................................................................................................................................................... 28

WIRING SIDE OF P.W.BOARD........................................................................................................................................... 31

WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 36

TROUBLE SHOOTING ........................................................................................................................................................ 37

FUNCTION TABLE OF IC.................................................................................................................................................... 40

CIRCUIT DESCRIPTION ..................................................................................................................................................... 42

PARTS GUIDE/EXPLODED VIEW
PACKING OF THE SET (MD-MT20 ONLY)

Page

SHARP CORPORATION

– 1 –

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

MD-MT20/20C/20W

SAFETY PRECAUTION FOR SERVICE MANUAL (MD-MT20W ONLY)

Precaution to be taken when replacing and servicing the Laser Pickup.

The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class I Requirements.
However, the following precautions must be observed during servicing to protect your eyes against exposure to the laser beam.

(1) When the cabinet has been removed, the power is turned on without a compact disc, and the Pickup is on a position

outer than the lead-in position, the Laser will light for several seconds to detect a disc. Do not look into the Pickup Lens.

(2) The Laser Power Output of the Pickup inside the unit and replacement service parts have already been adjusted prior

to shipping.
(3) No adjustment to the Laser Power should be attempted when replacing or servicing the Pickup.
(4) Under no circumstances look directly into the Pickup Lens at any time.
(5) CAUTION - Use of controls or adjustments, or performance of procedures other than those specified herein may result

in hazardous radiation exposure.

CAUTION

This Portable MiniDisc Recorder is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT label is located on the bottom.
Use the Portable MiniDisc Recorder only in accordance with the instructions given in
this manual and do not attempt to interfere with the interlock switch or make any
other adjustment as this may result in exposure to hazardous radiation.

Laser Diode Properties

Material: GaAIAs
Wavelength: 785 nm
Pulse time:
Read mode; 0.8 mW Continuous
Write mode; max. 10 mW 0.5S

min. cycle 1.5S

Repetition

VARO ! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.
VARNING! Osynlig laserstralning när denna del är öppnad och spärren är urkopplad. Betrakta ej strälen.

Precaution to be taken when replacing and servicing the laser pickup.
The following precautions must be observed during servicing to protect your eyes against exposure to the laser.

Warning of possible eye damage when repairing:
If the AC adaptor or batteries are connected when the top houising (disc cover) of the unit is removed, and the PLAY key is
pressed, the laser will light up during focus access (2-3 seconds). (Fig. 2-1) During the operation, the laser will leak from the
opening between the magnetic head and the mechanical chassis (Fig. 2-2). In order to protect your eyes, you must not look
at the laser during repair. Before repairing be sure to disconnect the AC adaptor and remove the batteries.

Magnet head

Optical pick-up

Top Cabinet

Mechanism
Chassis

Spindle motor

Magnet Head

Main PWB

Laser Beam

Optical Pick-Up

Figure 2-1 Figure 2-2

– 2 –

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

SPECIFICATIONS

MD-MT20/20C MD-MT20W

■ General

Power source:

Power consumption:
Output power:

Charging time:

Battery life:

DC 2.4V: Rechargeable Nickel-Metal Hydride battery (AD­DC 5V: AC adaptor (AC 120V, 60 Hz)

DC 3.0V: Commercially available, “AA” size (LR6), alkaline
DC 4.5V: Separately available car adaptor, AD-CA20X

7.5W(AC adaptor)
RMS; 20 mW (10 mW + 10 mW)

(0.2% T.H.D.)
Approx. 4 hours (90 %)

Approx. 6 hours (fully charged)
(When using the AC adaptor included with the unit)

T20BT) x 1

battery x 2
(for cars with a 12-24V DC negative ground elec-

trical system)

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

Continuous recording:

Approx. 7.5 hours

Continuous play:
Approx. 12 hours

When using two, commercially
available, high capacity, “AA”
size (LR6), alkaline batteries

Continuous recording:

Approx. 7.5 hours

Continuous play:
Approx. 15 hours

General

Power source:

Power consumption:
Output power:

Charging time:

Battery life:

MD-MT20/20C/20W

DC 2.4V: Rechargeable Nickel-Metal Hydride battery (AD­DC 5V: AC adaptor (AC 110 - 240V, 50/60 Hz)

DC 3.0V: Commercially available, “AA” size (LR6), alkaline
DC 4.5V: Separately available car adaptor, AD-CA20X

0.15A (AC adaptor)
RMS; 20 mW (10 mW + 10 mW)

(0.2% T.H.D.)
Approx. 4 hours (90 %)

Approx. 6 hours (fully charged)
(When using the AC adaptor included with the unit)

T20BT) x 1

battery x 2
(for cars with a 12-24V DC negative earth electri-

cal system)

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

Continuous recording:

Approx. 7.5 hours

Continuous play:
Approx. 12 hours

When using two, commercially
available, high capacity, “AA”
size (LR6), alkaline batteries

Continuous recording:

Approx. 7.5 hours

Continuous play:

Approx. 15 hours

● The continuous recording time is for analog inputs when the volume level is set to “VOL
0”.

● The continuous play time shows the value when the volume level is set to “VOL 15”.

● The above values are the standard values when the unit is charged and used at an

ambient temperature of 68°F (20°C).

● The operating time when using an alkaline battery may be different, depending on the
type and manufacturer of the battery, and on the operating temperature.

Input sensitivity:

Output level:

Dimensions: Width: 3-7/16"(87.9 mm)

Weight: 0.52 lbs. (235 g) with rechargeable battery
Input jack: Line/optical digital, microphone (powered by the main unit)
Output jack: Headphones (impedance: 19 ohms)/remote control unit

Recording level Reference input level Input impedance

MIC H 0.25 mV 10 k ohms
MIC L

LINE 100 mV 20 k ohms

Headphones — 10 mW + 10 mW 16 ohms

LINE

Height: 1-3/16" (29.8 mm)
Depth: 3-1/8" (79.7 mm)

2.5 mV 10 k ohms

Specified

output

250 mV
(-12dB)

Maximum

output level

Load

impedance

—

10 k ohms

■ MiniDisc Recorder

Type: Portable MiniDisc recorder
Signal readout: Non-contact, 3-beam semi-conductor laser pick-up
Audio channels: Stereo 2 channels/monaural (long-play mode) 1 channel
Frequency response:
Rotation speed: Approx. 400 – 900 rpm
Error correction: ACIRC (Advanced Cross Interleave Reed-Solomon Code)
Coding: ATRAC (Adaptive Transform Acoustic Coding), 24-bit com-

Recording method: Magnetic modulation overwrite method
Sampling frequency:

Wow and flutter:

20 – 20,000 Hz (± 3 dB)

puted type

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

Unmeasurable (less than ±0.001% W. peak)

The continuous recording time is for analogue inputs when the volume level is set to

“VOL 0”.
The continuous play time shows the value when the volume level is set to “VOL 15”.
The above values are the standard values when the unit is charged and used at an

ambient temperature of 20°C (68°F).
The operating time when using an alkaline batteries may be different, depending on

the type and manufacturer of the battery, and on the operating temperature.

Input sensitivity:

Output level:

Dimensions: Width: 87.9 mm (3-7/16")

Weight: 235 g (0.52 lbs.) with rechargeable battery
Input socket: Line/optical digital, microphone (powered by the main unit)
Output socket: Earphones (impedance: 32 ohms)/remote control unit

Recording level Reference input level Input impedance

MIC H 0.25 mV 10 k ohms

MIC L

LINE 100 mV 20 k ohms

Earphones — 10 mW + 10 mW 32 ohms

LINE

Height: 29.8 mm (1-3/16")
Depth: 79.7 mm (3-1/8")

2.5 mV 10 k ohms

Specified

output

250 mV
(-12dB)

Maximum

output level

Load

impedance

—

10 k ohms

MiniDisc Recorder

Type: Portable MiniDisc recorder
Signal readout: Non-contact, 3-beam semi-conductor laser pick-up
Audio channels: Stereo 2 channels/monaural (long-play mode) 1 channel
Frequency response:
Rotation speed: Approx. 400 – 900 rpm
Error correction: ACIRC (Advanced Cross Interleave Reed-Solomon Code)
Coding: ATRAC (Adaptive Transform Acoustic Coding), 24-bit com-

Recording method: Magnetic modulation overwrite method
Sampling frequency:

Wow and flutter:

20 – 20,000 Hz (± 3 dB)

puted type

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

Unmeasurable (less than ±0.001% W. peak)

Specifications for this model are subject to change without prior
notice

– 3 –

MD-MT20/20C/20W

Main unit

1. Monaural Long-Play Mode Indicator

2. Record Indicator

3. Level Meter

4. Fast Play Indicator

5. Repeat Indicator

6. TOC Indicator

7. Battery Indicator

8. Random Indicator

9. Track Number Indicator

10. Character/Time Information Indicator

11. Synchro Recording Indicator

12. Disc Mode Indicator

13. Disc Name Indicator

14. Track Name Indicator

15. Remaining Recording Time Indicator

16. Total Track Number Indicator

17. Edit/Auto Mark/Time Mark Button

18. Mode Button

19. Display/Character Select Button

20. Bass/Delete Button

21. Enter/Fast Play/Synchro Button

22. Volume Up/Cursor Button

23. Volume Down/Cursor/Charge Button

24. Record/Track Mark Button

25. Fast Reverse/Recording Level Down/
Name Select Button

26. Stop/Power Off Button

27. Play/Pause Button

28. Fast Forward/Recording Level Up/
Name Select Button

NAMES OF PARTS

Illustration: MD-MT20/20C

11
12

13
14

17

29

123456

15 16

18 20 21

19

28

27262524

7
8

9
10

22
23

30
31

29. Open Lever

30. Remote Control/Earphones Socket

31. Optical/Line Input Socket

32. Microphone Input Socket

33. Hold Switch

34. 5V DC Input Socket

35. Battery Cover

Remote control unit

1. Headphones Jack (MD-MT20/20C)

1. Earphones Socket (MD-MT20W)

2. Fast Reverse/Recording Level Down/
Name Select Button

3. Hold Switch

4. Play/Pause Button

5. Fast Forward/Recording Level Up/
Name Select Button

6. Stop/Power Off Button

7. Volume Up/Cursor Button

8. Bass/Delete/Track Mark Button

9. Volume Down/Cursor Button

1

2

3

32

33

34
35

4
5

6
7

8
9

– 4 –

OPERATION MANUAL

POWER SOURCE

This unit can be used with the following power sources: a rechargeable battery, an AC

adaptor, commercially available alkaline batteries, and a separately available car adaptor

(AD-CA20X).

Rechargeable battery power

When the rechargeable battery is used for the

first time or when you want to use it after a

long period of disuse, be sure to charge it fully.

1

Open the battery cover.

Slide the battery cover as far as it will

go to the outside and then lift to open it.

If the battery cover is lifted without be-

ing slid all the way out, it may break.

2

Insert the rechargeable battery accord-

ing to the polarity marked on the bottom

of the unit.

3

Close the battery cover.

4

Plug the AC adaptor into the AC socket,

and then insert the plug on the AC adap-

tor lead into the DC IN 5V socket.

5

Press the CHARGE (VOLUME down)

button of the main unit to begin charg-

ing.

“

” will appear, and the battery

will begin charging.

After about 4 hours have passed,

“

” will go out.

This indicates that the battery charg-

ing is about 90% compleate.

To charge the battery fully, continue

charging for about 2 more hours.

(In this case, you do not need to press

the CHARGE button. Even if the

CHARGE button is pressed, “

”

will not appear.)

Notes:

After charging has been completed, the

AC adaptor may be left connected.

(For example, when charging at night)

The battery will not be charged when the

power to the main unit is turned on.

Do not force open the battery cover too wide.

Do not use a rechargeable battery or an

AC adaptor other than those specified

(ACCESSORIES).

The charging time will vary, depending

on the condition of the battery.

When the battery is charged for the first

time or is charged after not being used

for a long period, the operating time may

be shorter than normal.The battery life

will recover with normal use i.e. charg-

ing and discharging.

T o avoid shortening the service life of the

battery only recharge the battery after it

has been completely discharged.

1

2

3

5

4

AC 110-240V,

50/60 Hz

Insert securely,

all the way in.

To the DC IN 5V socket

AC 120V,

60 Hz

Insert securely,

all the way in.

To the DC IN 5V jack

For MD-MT20/20C

For MD-MT20W

RECORDING USING THE OPTICAL DIGITAL CABLE

This is the method used for recording digi-

tal signals from CDs or MDs exactly as they

are stored on the original. Compared to re-

cordings made from analogue inputs, digi-

tal recordings have extremely high-quality

sound.

1

Connect the external equipment.

2

Start recording.

Synchro recording:

Before starting a synchro recording,

perform the following steps on the

equipment connected to this unit.

(1) First, put it in the playback mode.

(2) Next, put it in the pause mode.

(3) Finally, position it at the beginning

of the track you want to record.

(1) Insert a recordable MiniDisc, and

then press the REC button.

(2) Press the ENTER/SYNC button.

(3) Start the playback on the equipment

connected to this unit.

Manual recording:

(1) Insert a recordable MiniDisc, and

then press the REC button.

(2) Press the button.

When recording from digital inputs,it

is not necessary to adjust the record-

ing level.

Notes:

This unit incorporates a sampling rate

converter.

When this unit is connected to digital

equipment such as CS/BS tuners or DA T

tape recorders that use a different sam-

pling frequency (32 kHz or 48 kHz), re-

cordings can still be made. (The sam-

pling frequency of this unit is 44.1 kHz.)

When making a digital recording from a

portable CD player (if the player has a

sound skip prevention function and this

function is turned on) the optical output

will drop out and digital recording will not

be possible. Be sure to turn the sound

skip prevention function off.

There are cases where digital recording

may be impossible.

In the following cases digital recording is

impossible, even if you are using digital

cables.

When you attempt to make a new digital

recording from a track that was digitally re-

corded on a MiniDisc.

MiniDiscs are designed so that only first

generation digital copies can be made.

Further digital copies are prevented by

the SCMS (Serial Copy Management

System).

Playback

Digital cable

CD player, MD

player, etc.

Digitally recorded MiniDisc

Analogue recording is

possible.

Recording

Playback

Digital cable

Recording

MD player

MD-MT20/20C/20W

– 5 –

MD-MT20/20C/20W

If the hold function is active whilst the power

is turned off, the power cannot be turned

on by mistake and the battery will not be

accidentally drained.

CONVENIENT OPERATION OF THE UNIT

< How to read the battery indicator >

When the battery is completely discharged,

the battery indicator will flash. Recharge the

battery or replace the alkaline batteries with

a new one.

When the battery has run completely out,

“BATT EMPTY” will appear. Then, the

power will be disconnected automatically.

Notes:

When using the unit with alkaline batteries

or a rechargeable battery, the battery indi-

cator will not correctly display the remain-

ing capacity for approximately 10 seconds

after the power has been turned on.

When the AC adaptor included with this unit

or a separately available car adaptor is

used, the battery indicator will not be shown.

The number of bars shown in the battery

indicator may increase or decrease, de-

pending on the operation being performed.

This is normal.

To prevent the unit from being

operated by mistake

To avoid accidental operation of the unit,

use the hold function.

Move the HOLD switch to the safety posi-

tion (direction indicated by the arrow).

When the unit is in the hold mode, press-

ing the buttons will have no affect.

To cancel the hold mode, move the

HOLD switch away from the safety po-

sition (the opposite direction of the ar-

row).

Battery indicator

Since the battery level is very low, you

cannot start recording or editing.

When the battery

level is high

When the battery

level is very low

Remote

control unit

Main

unit

Can be operated

from either the

remote control unit or

the main unit.

Can only be operated

from the remote

control unit.

Can only be operated

from the main unit.

Cannot be operated

from either the

remote control unit or

the main unit.

Cancel

Cancel

Cancel

Cancel

Hold

Hold

Hold

Hold

Checking the remaining amount

of battery level

The remaining amount of battery level is

shown by the battery indicator (

) dur-

ing operation.

TROUBLESHOOTING

Moisture condensation

In the following cases, condensation

may form inside the unit.

Shortly after turning on a heater.

When the unit is placed in a room where

there is excessive steam or moisture.

When the unit is moved from a cool

place to a warm place.

When the unit has condensation inside,

the disc signals cannot be read, and the

unit may not function properly.

If this happens, remove the disc.

The condensation should evaporate in

approximately 1 hour. The unit will then

function properly.

Many potential “problems” can be resolved by the owner without calling a service techni-

cian.

If something seems to be wrong with this product, check the following before calling your

authorised SHARP dealer or service centre.

PROBLEM CAUSE

The unit does not turn

on.

Is the AC adaptor disconnected?

Is the battery exhausted?

Is the unit in the hold mode?

Has condensation formed inside the unit?

Is the unit being influenced by mechanical shock or by

static electricity?

Is the volume set too low?

Is the remote control unit or the earphones plugged in?

Are you trying to play a MiniDisc with data on it instead

of a MiniDisc containing music?

Is the unit in the hold mode?

Is the battery exhausted?

Is the remote control unit plug or the earphone plug in-

serted firmly?

Is the battery exhausted?

Is the unit being subjected to excessive vibration?

Has the track number or character information been

written on the disc yet?

Is the unit in the recording or editing mode?

Is the MiniDisc protected against accidental erasure?

Is the unit connected properly to the other equipment?

Is the AC adaptor unplugged or did a power failure oc-

cur whilst recording or editing?

Is the unit in the hold mode?

Is an optical signal being output from the external equip-

ment?

Read the operation manual for the external equipment.

No sound is heard from

the earphones.

When the operation

buttons are pressed, the

unit does not respond.

Some sounds are

skipped.

The MiniDisc cannot be

ejected.

Recording and editing

are impossible.

If trouble occurs

When this product is subjected to strong

external interference (mechanical shock,

excessive static electricity, abnormal sup-

ply voltage due to lightning, etc.) or if it is

operated incorrectly, it may malfunction.

If such a problem occurs, do the following:

1. Unplug the AC adaptor from the AC

socket.

2. Remove the battery.

3. Leave the unit completely unpowered for

approximately 30 seconds.

4. Plug the AC adaptor back into the AC

socket and retry the operation.

If strange sounds, smell or smoke come out

of the unit or an object is dropped into the

unit, remove the AC adaptor from the AC

socket immediately and contact an

authorised SHARP service centre.

– 6 –

MD-MT20/20C/20W

When the number of tracks used reaches

the limit, regardless of the remaining re-

cording time, further recording will be

impossible.

(Maximum number of tracks: 255)

If a MiniDisc has been recorded or ed-

ited repeatedly or if a MiniDisc has

scratches on it, it may not be possible to

record the maximum number of tracks on

it.

If there are scratches on a disc, the unit

will automatically avoid recording in those

areas. The recording time will be reduced.

When the remaining recording time of a

disc is displayed, short tracks less than

12 seconds long may not be included in

the total.

For MiniDiscs on which repeated record-

ing and editing operations were per-

formed, the COMBINE function may not

work.

A cluster (about 2 seconds) is normally the

minimum unit of recording. So, even if a track

is less than 2 seconds long, it will use about

2 seconds of space on the disc.

Therefore, the time actually available for re-

cording may be less than the remaining time

displayed.

If there are scratches on discs, those sec-

tions will be automatically avoided (no record-

ing will be placed in those sections). There-

fore, the recording time will be reduced.

For MiniDiscs on which repeated record-

ing and editing were performed, some

sounds may be skipped whilst cueing and

reviewing.

If there are scratches or dust on a

MiniDisc, the track numbers following that

track will be increased by one.

MINIDISC SYSTEM LIMITATIONS

MiniDiscs are recorded using a different system than is used for cassette tapes or DAT

recordings. Therefore, the following conditions may be encountered, depending on how

the disc has been recorded or edited. These are due to system limitations, and should be

considered normal.

Even if the maximum recording

time of a MiniDisc has not been

reached, “DISC FULL” or “TOC

FULL” may be displayed.

Even if the number of tracks and

the recording time have not

reached the limit, “DISC FULL”

may be displayed.

Even if several short tracks are

erased, the remaining recording

time may not show an increase.

Two tracks may not be combined

in editing.

The total of the recorded time and

time remaining on a disc may not

add up to the maximum possible

recording time.

When recorded tracks are played

back using the cue and review op-

erations, some sounds may be

skipped.

A track number can be created in

the middle of a track.

● The battery is run down.

● Nothing is recorded.

● No copy can be made because of the

SCMS copyright system.

● A track cannot be edited.

● Recording cannot be performed

correctly due to vibration or shock in

the unit.

● Editing is impossible.

● The disc is scratched.

● Poor connection of the digital cable.

● The disc is out of recording space.

● The unit is in the hold mode.

● The EJECT lever was moved during

recording or editing.

● A disc has not been loaded.

● You tried to record on a playback- only

disc.

● Improper power is being supplied.

● The MD is write protected.

● You tried to record without loading an

MD.

● A playback-only MD was loaded and

the REC button was pressed when the

power was off.

● The disc is damaged.

● Since a track number is currently being

located or written to, the unit cannot

accept your command.

● You have come to the conclusion that

the unit is out of order.

● The temperature is too high.

● A large portion of the disc has been

damaged.

● There is no space left for recording

character information (track names,

disc names, etc.).

● The track has been protected from

being erased.

● A large portion of the disc has been

damaged.

● There is an error in the recorded signal.

● A disc which contains data other than

music was played.

● There is an error in the signal from the

disc.

● Charge the rechargeable battery or

replace the alkaline battery (or use the

AC adaptor for power).

● Replace the disc with a recorded disc.

● Record using the analog cable.

● Change the stop position of the track

and then try editing it.

● Re-record or replace it with another

recordable disc.

● Check the number of tracks.

● If the sound you hear is not right, try

recording again.

● Replace the disc with another

recordable disc.

● Connect the digital cable securely.

● Replace it with another recordable disc.

● Return the HOLD switch to its original

position.

● Turn off the power and remove the

MiniDisc.

● Load a disc.

● Replace it with a recordable disc.

● Use one of the specified power

sources.

● Move the write protection knob back to

its original position.

● Load a recordable MD.

● Replace it with a recordable MD.

● Reload the disc or replace it.

● Replace it with another recorded disc.

● Wait for a while and try the operation

again.

● To have it repaired, go to the distributor

where you purchased the unit.

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

● Replace it with another recorded disc.

● Replace it with another recordable disc.

● Edit the track with the device on which

it was recorded.

● Replace it with another recorded disc.

● Erase all of the signal errors, and then

try recording again.

● A disc which contains non-music data

cannot be played.

● Replace it with another recorded disc.

ERROR MESSAGES

( ): Error messages seen on the remote control.

Error messages

Remedy

BATT EMPTY

(Lo BATT)

BLANK DISC

(BLANK)

Can’t COPY

(Not REC)

Can’t EDIT

Can’t REC

(Not REC)

Can’t WRITE

DEFECT

(DEFECT)

Din UNLOCK

(UNLOCK)

READ ERROR

(E-READ)

DISC FULL

HOLD

(HOLD)

LOCKED

LOCK ERROR

NO DISC

PB DISC

POWER ?

SORRY

(SORRY)

SYSTEM ERR

(E-SYS)

TEMP OVER

(E-TEMP)

TOC ERROR

(E-TOC)

TOC FULL

Tr. Protect

U TOC ERROR

(E-UTOC)

? DISC

(?DISC)

Meaning

PROTECTED

– 7 –

MD-MT20/20C/20W

3

Connection /

Conexión

■ Analog recording

■

Grabación analógica

■ Digital recording

■

Grabación digital

■ Microphone

■

Micrófono

MIC IN

PLUG IN

POWER

Stereo microphone

Micrófono estéreo

Recording side

Lado de grabación

OPTICAL/

LINE IN

• To the line output jacks

on a stereo

•

A los enchufes de

salida de línea de un

equipo estéreo

LR

(RIGHT)

(DERECHO)

• Analog cable included with this unit

•

Cable analógico suministrado con este

(LEFT)

(IZQUIERDO)

Playback side

Lado de reproducción

Recording side

Lado de grabación

OPTICAL/

LINE IN

• Optical digital cable

(supplied)

•

Cable óptico digital

(suministrado)

Playback side

Lado de reproducción

Recording side

Lado de grabación

DIGITAL OUT

AUDIO OUT

1

2

4

3

5

5

1

Check the supplied accessories /

Compruebe los accesorios suministrados

2

Power source /

Alimentación

PORTABLE MINIDISC RECORDER

Quick Guide/Guía rápida

MD-MT20

■ Rechargeable battery power

■

Alimentación de la batería recargable

• AC 120V, 60Hz

•

120V CA, 60Hz

■ Alkaline battery power

■

Alimentación de la pila alcalina

■AC power

■

Alimentación de CA

• AC 120V, 60Hz

•

120V CA, 60Hz

● Carrying Bag x 1

●

Caja para el

transporte x 1

● Analog Cable x 1

●

Cable analógico x 1

● Optical Digital Cable

x 1

●

Cable óptico digital

x 1

● AC Adaptor x 1

●

Adaptador de CA x 1

● Headphones x 1

●

Auriculares x 1

● Remote Control Unit

x 1

●

Controlador remoto

x 1

● Rechargeable Nickel-

Metal Hydride Battery x 1

●

Batería recargable de

litio-ion x 1

1

2

3

● Battery Carrying Case

x 1

●

Caja portabaterías x 1

OUICK GUIDE (MD-MT20 ONLY)

– 8 –

MD-MT20/20C/20W

2

1

3

2

1

3

4

4

Recording /

Grabación

To turn off the power:

Para desconectar la alimentación:

To remove the MiniDisc:

Para extraer el minidisco:

Turn off the power and move the OPEN lever in the di-

rection indicated by the arrow.

Desconecte la alimentación y mueva la palanca OPEN en el

sentido indicado por la flecha.

Press the ENTER/SYNC button.

Pulse el botón ENTER/SYNC.

Begin playback on the source equipment.

Inicie la reproducción en el equipo fuente.

Press the REC button.

Pulse el botón

REC.

When a sound, such as a person speaking, is

picked up by the microphone, recording will be-

gin automatically.

Connect the stereo microphone to the MIC IN jack.

Insert a recordable MiniDisc.

Inserte un minidisco grabable.

■ Recording from CDs or MDs (Synchro recording)

■

Grabación de discos compactos o minidiscos (Grabación sincronizada)

■ Recording from the microphone (Mic synchro recording)

■

Grabación de un micrófono (Grabación sincronizada con micrófono)

Press the ENTER/SYNC button to select the syn-

chro recording level. (This level can be changed,

even while recording.)

Press the ■/:OFF button while in the stop mode.

Pulse el botón

■

/:OFF estando en el modo de parada.

Connect the external equipment.

Conecte el equipo externo.

1

Insert a recordable MiniDisc.

Inserte un minidisco grabable.

2

Press the REC button.

Pulse el botón REC.

3

4

5

6

1

2

3

4

5

6

Press the ■/:OFF button.

Pulse el botón

■

/:OFF.

To stop recording:

Para detener la grabación:

Mientras se produce el sonido del equipo externo

conectado a este aparato, pulse el botón o

para ajustar el nivel de grabación.

Conecte el micrófono estéreo al enchufe MIC IN del

aparato principal.

Pulse el botón o para ajustar el nivel

de grabación.

Press the or button to adjust the

recording level.

Pulse el botón ENTER/SYNC para seleccionar el

nivel de la grabación sincronizada. (Este nivel podrá

cambiarse incluso durante la grabación.)

Cuando el micrófono capte un ruido, el de una per-

sona que hable por ejemplo, la grabación empezará

automáticamente.

While playing sound from the external

equipment connected to this unit, press the

or button to adjust the recording

level.

5

Playing a MiniDisc /

Reproducción de un minidisco

2

1

3

4

Insert the headphones plug firmly into the

headphones jack on the remote control unit.

1

Plug the remote control unit into the jack on

the main unit. Push the plug all the way in.

2

● The power will be turned on automatically, and play-

back will start from the first track.

(Auto-play function)

●

La alimentación se conectará automáticamente, y la

reproducción empezará desde la primera pista.

(Función de reproducción automática)

To interrupt playback:

Para interrumpir la reproducción:

Press the button during playback.

● To resume playback, press the button again.

Pulse el botón

durante la reproducción.

●

Para reanudar la reproducción, pulse de nuevo el botón

To turn off the power:

Para desconectar la alimentación:

Press the button.

In the following cases, the auto-play function will not work.

● When the recordable MiniDisc write protection tab is closed

● When the auto-play function has been canceled

Playback does not start when a MiniDisc is inserted:

La

reproducción no empieza cuando se inserta un

minidisco:

6

Sound control /

Control del sonido

Adjust the bass level.

Each time the BASS button is pressed, the tone will be

switched as follows:

• Volume (0 - 30)

•

Volumen (0 - 30)

To stop playback:

Para detener la reproducción:

Press the ■/:OFF button.

Pulse el botón

■

/:OFF.

Press the ■/:OFF button while in the stop mode.

Pulse el botón

■ /

:OFF estando en el modo de parada.

3

Adjust the volume.

Press the + button to increase the volume and the –

button to decrease the volume.

Ajuste el volumen.

Pulse el botón + para aumentar el volumen y el botón –

para reducirlo.

BASS 1 ------- Bass sounds are emphasized slightly

.

BASS 2 ------- Bass sounds are emphasized more.

BASS 3 ------- Bass sounds are emphasized even more.

BASS OFF ----Bass emphasiz is canceled.

BASS 1 -------

Los sonidos graves se realzan ligeramente.

BASS 2 -------

Los sonidos graves se realzan más.

BASS 3 -------

Los sonidos graves se realzan aún más.

BASS OFF ----

El realce de los graves se cancela.

Inserte firmemente la clavija de los auriculares

en el enchufe de auriculares del controlador

remoto.

Enchufe el controlador remoto en el enchufe

del aparato principal. Empuje completamente

hacia adentro la clavija.

Pulse el botón

.

En los casos siguientes, la función de reproducción automática

no se activará.

●

Cuando esté cerrada la lengüeta de protección contra

escritura del minidisco grabable

●

Cuando haya sido cancelada la función de reproducción

automática

Ajuste el nivel de los graves.

Cada vez que pulse el botón BASS, el tono cambiará de la

forma siguiente:

Insert a MiniDisc.

Inserte un minidisco.

– 9 –

MD-MT20/20C/20W

DISASSEMBLY

Cares before disassembling

When assembling the machine after disassembling or
repair, observe the following requirements so as to ensure
safety and performance.

1. Remove the batteries from the machine, and take out the
mini-disc.

2. When assembling after repair, be sure to restore the
initial location of wires.
Since the screws are small, incorrect fixing may result in
malfunction.

3. When repairing, pay utmost attention to static electricity
of IC.

STEP

REMOVAL

1 Bottom Cabinet 1. Screw .....................(A1) x7 10-1

2 Top Cabinet 1. Open the Top cabinet. 10-1

3 Key Switch/LCD 1. Flexible PWB......... (C1) x2 10-2

4 Mechanism Unit 1. Flexible PWB......... (D1) x2 10-2

5 Main PWB 1. Flat cable................(E1) x1 10-2

6 Audio PWB

PROCEDURE

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

3. Screw .....................(B2) x1

2. Raise the rear part, and ..... 10-3

remove in the arrow direction.

2. Screw .....................(E2) x2

1.

Screw ......................(F1) x3 10-4

FIGURE

(A1)x2

ø1.4x2mm

Open Lever

ø1.4x2mm

(E2)x2

ø1.7x2.5mm

Main
PWB

(B1)x2

ø1.4x2mm

OpenOpen

(B2)x1

pull

pull

pull

LCD

Key Switch

Top Cabinet

(A1)x2

ø1.4x2mm

Bottom

Cabinet

Figu re 10-1

Put the fold on the connector, and
apply with the felt. Sagging may
result in contact with the sheet metal.

(D1)x1

pull

pull

pull

pull

pull

(A1)x1

ø1.4x2mm

(B1)x2

ø1.4x2mm

(A1)x2

ø1.4x2mm

Felt

(D1)x1*
Flexible PWB
for optical pickup

Audio

PWB

(F1)x3

ø1.7x2.5mm

(C2)x2

Mechanism

(E1)x1

Unit

LCD

Key Switch

Caution:

Carefully handle the main PWB and flexible PWB. After removing the
flexible PWB (1*) for the optical pickup from the connector, do not
touch directly the front end of flexible PWB with your hand so as to
prevent damage of optical pickup by static electricity.

Figure 10-2

Mechanism Unit

Audio PWB

Figure 10-4

Figure 10-3

– 10 –

REMOVING AND REINSTALLING THE MAIN PARTS

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

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

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

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

How to remove the head up/down motor
(See Fig. 11-2.)

1. Remove the solder joints (B1) x 2 of head up/down motor

lead wire.

2. Remove the screw (B2) x 1 pc., and remove the flexible
PWB.

3. Remove the screw (B3) x 1 pc., and remove the head up/
down motor.

Note:

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

(A2)x3
ø1.4x2.8mm

Spindle Motor

Remove the
solder joint
(B1)x2

Head Up/Down
Motor

MD-MT20/20C/20W

(A1)x1
Mechanism Flexible
PWB Solder joint

MD Mechanism

Figure 11-1

(B3)x1
ø1.4x5.5mm

(B2)x1
ø1.4x1.5mm

How to remove the sled motor (See Fig. 11-3.)

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

gear (C2) x 1 pc.

2. Remove the screws (C3) x 2 pcs., and remove the sled

motor.

3. Remove the solder joints (C4) x 2 of flexible PWB.

Note:

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

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

1. Remove the screws (D1) x4 which connects the magnetic

head to the head relay flexible PWB, remove the spring
washers (D2) x 2 and remove the soldering joints (D3) x 2.

Note:

Mount carefully so as not to damage the magnetic head.
(If the gear is damaged, noise is caused.)

How to reinstall the optical pickup unit
(See Fig. 11-5.)

1. Remove the screw (E1) x 1 pc.

2. Slowly raise the optical pickup.

(C1)x1

Stop Washer

(C2)x1

Drive Gear

Figure 11-2

Figure 11-3

(D1)x2
ø1.4x2.2mm

MD Mechanism

(C3)x2
ø1.4x1.2mm

Sled Motor

(C4)x2
Mechanism Flexible
PWB Solder Joint

MD Mechanism

(D2)x2
Spring Washer

Guide Shaft

Optical
Pickup Unit

Figure 11-5

(E1)x1
ø1.7x3mm

Thrust Plate Spring

MD Mechanism

– 11 –

Magnetic Head

(D1)x1
ø1.4x1.5mm

Figure 11-4

(D3)x2
Solder joint

(D1)x1
ø1.2x1.6mm

MD Mechanism

MD-MT20/20C/20W

ADJUSTMENT

Test disc

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

Type

Test disc

Parts No.

1 High reflection disc MMD-110 (TEAC Test MD) 88GMMD-110
2 Low reflection disc MMD-212 (TEAC Test MD) 74-minute disc 88GMMD-212
3 Low reflection disc MMD-213A (TEAC Test MD) 80-minute disc 88GMMD-213A
4 Low reflection disc Recording minidisc UDSKM0001AFZZ

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

Entering the TEST mode

1. Setting at port (power nonconnected state)

(1) Set the port as follows.
TEST1 : "Low" (TP416)
TEST0 : "High"
(2) Turn the Power ON.
(3) Test Mode STOP [ T E S T _ ]

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

(1) Holding down the DISP button and ENTER button, press the PLAY button.
(2) Normal mode setting initialization (BASS setting, VOL setting, etc.)
*Since the unit is changed to the setting for production line inspection , be sure to set it to the default setting state in the following default
setting procedure before returning it to the user.
(3) Indication of microcomputer version for one second [ 3 1 8 A f X ]

Destination

Microcomputer version

(4) Whole LCD lighting for 2 seconds
(5) Test Mode STOP [ T E S T _ ]
*When the PLAY button is pressed during indication (3) and (4), the process proceeds to (5).

EEPROM version

Leaving the TEST mode

(1) Press the STOP button in the TEST mode stop state or version indicating state or whole LCD lighting state.

Shipping setting method

Holding down simultaneously the VOLUME-DOWN Button and PLAY Button of the set unit without disc, supply the power from the DC IN plug.
After the indication "INIT" -> "BYE OK" disappears, release the power supply of DC IN.

Test Mode

1. AUTO 1 Mode • Perform preliminary automatic adjustment.

2. AUTO 2 Mode

3. TEST-PLAY Mode

4. TEST-REC Mode

5. MANUAL 1 Mode

6. MANUAL 2 Mode

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

AUTO1.

• Perform ATT (attenuator) automatic adjustment.

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

• Continuous playback from the specified address
is performed.

• 1 line, 10 lines or 384 lines manual jump is
performed.

• C1 error rate display (pit section), ADIP error
rate display (groove section)

• The temperature correction is performed only when
servo start is performed, but the posture correction
is not performed during continuous playback.

• Continuous record from the specified address
is performed.

• Change of record laser output(servo gain is also
changed according to laser output).

• The temperature correction is performed only
when servo start is performed, but the posture
correction is not performed during continuous
recording.

• Temperature is displayed. (Updating in real time)

• Seeing the displayed adjustment value, perform

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

• Temperature is displayed. (Updating in real time)

• Seeing the displayed adjustment value perform
manfully the preliminary adjustment.

(Error rate indication, jump test)

• Continuous playback is performed

(error rate display, jump test).

7. RESULT 1 Mode

8. RESULT 2 Mode

9. DIGITAL INPUT Mode

10. ERROR INFORMATION
Mode • Error information is initialized

11. NORMAL Mode

12. EEPROM Mode

13. INNER Mode

• The value adjusted in AUTO1 or MANUAL1 is
indicated.

• (Execution in servo "OFF" state").

• The value adjusted in AUTO 2 or MANUAL 2 is
indicated.

• Adjustment value is changed manually.
(error rate display, jump test).

• Digital input information is displayed.

• Error information is displayed.

• The mode is changed from the TEST mode to
the normal mode without adjustment.

• In the normal mode the internal operation mode,
memory capacity, etc. areindicated.

• In the normal mode both temperature correction
and posture correction are perfomed.

• Factors of digital servo are changed manually.
(Each servo is turned on individually.)

• Cut-off frequency of BASS1, BASS2 and BASS3
is selected manually.

• Temperature detection terminal voltage is
measured, and the reference value is set.

• Defaults are selected and set.

• Setting of EEPROM protect area is updated.
(In case of protect releasing)

• Determine the position where the INNER switch
is turned on. (only high reflection disc).

• The temperature correction is performed only
when servo start is performed, but the posture
correction is not performed.

– 12 –

MD-MT20/20C/20W

Operation in each TEST mode

1. AUTO1 Mode

• When the STOP button is pressed while the AUTO1 menu appears or during automatic adjustment, the mode changes to the TEST mode
stop state. At this time the adjustment value is not output.

• Be sure to adjust, using the specified disc MMD-213A or MMD-212.

At this time release the EEPROM (IC402) protection. (Refer to EEPROM write procedure.)

• Adjustment NG; Adjustment item out of range, focus ON failure, and adjustment error

• When the PLAY button is pressed while ADJ. OK is displayed, AUTO2 is executed.

2. AUTO2 Mode

• When the STOP button is pressed while the AUTO2 menu appears or during automatic adjustment, the mode changes to the TEST mode
stop state. At this time the adjustment value is not output.

• Adjustment NG; Adjustment item out of range, and adjustment error.

• When the PLAY button is pressed while ADJ. OK is displayed,TEST_PLAY is executed.

3. TEST-PLAY Mode

• When the STOP button is pressed while the TEST-PLAY menu appears, or in TEST-PLAY or continuous playback mode, the mode
changes to the TEST mode stop state.

• When the PLAY button is pressed while the TEST-PLAY menu appears,continuous playback is initiated from the current pickup position.

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

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

• Each time the MODE button is pressed while the TEST-PLAY mode target address is displayed, the digit which is changed by pressing the
SKIP UP/DOWN button is changed as follows.

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

• When the SKIP DOWN button is pressed in the TEST-PLAY mode target address is displayed, the digit of address specified by the MODE
button is set to -1h. (0 to F)
* When the SKIP UP/DOWN button is held down, the setting changes continuously, one cycle being 100 ms.

• When the BASS button is pressed in the continuous playback mode, the number of jump lines changes as follows.

* After the number of jump lines is indicated for one second, the address indication is restored. [ T R _ ]

• When the SKIP UP button is pressed in the continuous playback mode, the specified number of lines is jumped in the FWD direction.

• When the SKIP DOWN button is pressed in the continuous playback mode, the specified number of lines is jumped in the REV direction.
* When the SKIP UP/DOWN button is held down, jump is repeated every approx. 100 ms.

•Whenever the DISP button is pressed in the continuous playback mode, the indication changes as follows.
* Pre-mastered disc

* Recordabl disk

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

0032 — 0032 — 0032 — 0032 —

1 — 10 — 384 — 1

Continuous playback (SUBQ address indication) [ S Q ]

|

Continuous playback (C1 error indication) [ C E ]

|

Continuous playback (SUBQ address indication) [ S Q ]

Continuous playback (ADIP address indication) [ A P ]

|

Continuous playback (C1 error indication) [ C E ]

|

Continuous playback (ADIP error indication) [ A E ]

|

Continuous playback (ADIP address indication) [ A P ]

4. TEST-REC Mode

• When the STOP button is pressed while the TEST-REC menu appears, or in the TEST-REC mode or continuous record mode, the mode
changes to the TEST mode stop state.

• When the PLAY button is pressed while the TEST-REC menu appears, the continuous record is initiated from the current pickup position.

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

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

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

• Whenever the MODE button is pressed in the TEST-REC mode target address is displayed, the digit which is changed by the SKIP UP/

DOWN button changes as follows.

0032 — 0032 — 0032 — 0320 —

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

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

* When the SKIP UP/DOWN button is held down, the setting changes continuously, one cycle being 100 ms.

– 13 –

MD-MT20/20C/20W

5. NORMAL Mode

• When the STOP button is pressed while the NORMAL menu appears, the mode changes to the TEST mode stop state.

• Indication during operation
Indication of memory capacity on main unit LCD [ ] + Level meter

: Internal mode
: Address (Cluster section)

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

• Recording is also possible.

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

6. Error data display Mode

• Reversing when SKIP DOWN button is pressed

• When the STOP button is pressed while the error data indication menu appears or during error data indication, the mode changes to the
TEST mode stop state.

• Error data 0 is the latest error.

• Error which occurred in the TEST mode is also stored in the memory.

• When the DISP button is pressed while the error data indication menu appears, the error data is initialized. [ C L E A R _ ]

: Error Code

•

Explanation of error history code

12h : RF side FG, TG, and TCRS adjustment termination failure
13h : Adjustment servo retraction excessive retrial
16h : C. IN detection time-over
17h : A, B, E, F, and TCRSO offset measurement value out of

tolerable range
21h : Focus retraction completion allowable time-over
23h : Track search completion allowable time-over
24h : Disc linear speed measurement failure
32h : P-TOC read failure
42h : U-TOC read failure
44h : U-TOC write data write disabled/read check error
52h : SD write data write disabled
71h : Pickup position initialization time-over
72h : EEPROM data read check sum error
73h : Record head drive disabled (by EJECT lever)
82h : Power overvoltage detection
91h : Ambient temperature is higher that the allowable tempera-

ture.

: Address (Sector section)

7. INNER Mode

• when the STOP button is pressed on the INNER menu (SQ______ ), the state is changed to the TEST mode STOP state.

• : Address

– 14 –

MD-MT20/20C/20W

EEPROM (IC402) writing procedure

1. Procedure to replace EEPROM and write initial value of microcomputer in EEPROM

(1) Replace EEPROM.
(2) Deprive EEPROM of protection (connect the pins 8 and 6 of IC402).
(3) Refer to the latest EEPROM data list.
(4) Press the Display button, Ente button and Play button to start the test mode.
(5) Version display

[ V e r . ]

(6) The whole LCD lights.
(7) Test mode stop state.

[ T E S T ]

(8) Press the "BASS" button, and press twice the "SKIP DOWN" button.

[ E E P R O M ]

(9) Perform the operation to display "EEPROM SETTING MODE CHART", compare the EEPROM DATA LIST with the display,

and set according to the EEPROM DATA LIST with the VOL UP or VOL DOWN key.

(10)

Set the temperature reference. (Refer to the Temperature Reference Setting Method.)

(11)

Set according to the EEPROM DATA LIST.

(12)

Press the Stop button.

[ T E S T ]

(13)

Press the Stop button.

(14)

After data is written in EEPROM, turn off power .

(15)

Restore protection of EEPROM (Disconnect connection made in Step (2) above).

X

EEPROM version (f ~ Z)
Microcomputer ROM version

2. Temperature reference setting method

[1] Measurement, calculation and setting procedure

(1) Set the TEST mode.

• Set TEST 1, 0 = '01', and turn on power (or set PLAY ON in standby state).
(2) Start the EEPROM mode 'Temp' menu.

• Key operation in order of BASS, SKIP-DOWN x 2 times, PLAY, PLAY in the test mode STOP state.

• 'TM$$%%' is displayed. ($$= Temperature code, %% = Temperature reference)
(3) Once press SKIP-UP, and determine the displayed microcomputer TEMP input AD value.

• 'TPin##' is displayed. (## = TEMP input AD value)
(4) At the ambient temperature, determine the temperature corrected value from the temperature measurement value

correction table.

(5) Determine the temperature reference, using the following formula.

• Temperature reference = Microcomputer TEMP input AD value + Temperature corrected value
(6) Set the temperature reference value by button operation , and check whether the temperature code indication corresponds to "Temperature

Code Identification Table".

[2] Temperature measurement value correction table

Ambient

temperature

+ 9oC ~ +11oC - 05h + 10.0oC
+12oC ~ +14oC - 04h + 12.7oC
+15oC ~ +16oC - 03h + 15.4oC
+17oC ~ +19oC - 02h + 18.2oC
+20oC ~ +22oC - 01h + 20.9oC
+23oC ~ +24oC ± 00h + 23.6oC
+25oC ~ +27oC + 01h + 26.3oC
+28oC ~ +30oC + 02h + 29.0oC
+31oC ~ +33oC + 03h + 31.8oC

Temperature

correction

Center

temperature

Ambient

temperature

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

+ 3oC ~ +21oC 07h + 12.5oC
+15oC ~ +33oC 06h + 23.6oC
+26oC ~ +43oC 05h + 35.0oC

Temperature

correction

Center

temperature

– 15 –

MD-MT20/20C/20W

EEPROM DATA LIST (EEPROM version f)

TEMP setting

Item display Set values

T M _ _ Calculate values

Fucus setting

Item display Set values

F G _ _ B 0 H
F F 1 _ 7 0 H
F F 2 _ E 8 H
F Z H _ E D H
F L n _ 0 A H
D J G _ 1 4 H
F L V _ 3 3 H
W T f _ 2 0 H
F S S _ E 9 H

Tracking setting

Item display Set values

T G _ _ 4 8 H
T F 1 _ 7 0 H
T F 2 _ E 0 H
T F S _ 0 0 H
T B o _ 4 4 H
T B t _ 2 0 H
T K o _ 4 4 H
T K t _ 1 D H
T D o _ 6 7 H
T D t _ 3 4 H
T G R _ 0 0 H
S C t _ 4 0 H
S C m _ 5 3 H
C L p _ 1 8 H
C L r _ 2 8 H
J P I _ 0 1 H
K 1 0 _ 6 5 H

Spindle setting

Item display Set values

S P G _ 1 4 H
S P i _ E 0 H
S P m _ A 0 H
S P o _ 6 8 H
S P 1 _ 1 0 H
S P 2 _ 6 0 H
S P 3 _ F 2 H
S P 4 _ F 2 H
S P 5 _ 1 0 H
S P D _ 7 F H
S P K _ E B H

BASS setting

Item display Set values

B S 1 _ 3 F H
B S 2 _ 1 F H
B S 3 _ E 2 H

Sled setting

Item display Set values

S L G _ D F H
S L 2 _ 2 0 H
S L M _ 7 F H
S L V _ D 7 H
S K k _ 7 2 H
S K t _ 7 0 H
S K m _ 7 8 H
W T m _ 2 4 H
M V 1 _ 4 F H
M V 2 _ A A H
S R V _ 0 A H

ADJ. SET setting

Item display Set values

C O K _ A 0 H
F A T _ C 0 H
T A T _ 3 E H
C A T _ 2 0 H
F A B _ E 0 H

EQ. SET setting

Item display Set values

H Q 1 _ 9 0 H
H Q 2 _ 9 0 H
H S G _ 1 1 H
H S O _ F D H
L Q 1 _ 9 0 H
L Q 2 _ 9 0 H
L S G _ 1 1 H
L S O _ 0 0 H
G Q 1 _ 9 8 H
G Q 2 _ 8 4 H
G S G _ 1 1 H
F L p _ 0 8 H

Control setting

Item display Set values

C T 0 _ 0 5 H
C T 1 _ 1 1 H
C T 2 _ 7 F H
C T 3 _ 3 0 H
R C 0 _ C 0 H
R C 1 _ F E H
S Y C _ A 6 H
P W L _ 0 3 H
D R 1 _ 9 2 H
D R 2 _ C 8 H
I N 1 _ D 3 H
I N 2 _ 6 4 H
I N 3 _ D 2 H

I N H _ 6 4 H
D R H _ C 8 H
P L E _ 1 B H
R C E _ 4 2 H
E L T _ 7 6 H
S L T _ 4 3 H
S P M _ 0 0 H
M S L _ 0 0 H
U S 0 _ 0 0 H
U S 1 _ 0 0 H
U S 2 _ 0 0 H

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