Sharp MD-MT88H User manual

MD-MT88H/99H
Page
SAFETY PRECAUTION FOR SERVICE MANUAL ............................................................................................................... 2
SPECIFICATIONS ................................................................................................................................................................. 3
ACCESSORIES ..................................................................................................................................................................... 5
NAMES OF PARTS ............................................................................................................................................................... 6
OPERATION MANUAL .......................................................................................................................................................... 7
DISASSEMBLY.................................................................................................................................................................... 12
REMOVING AND REINSTALLING THE MAIN PARTS....................................................................................................... 13
ADJUSTMENT ...................................................................................................................................................................... 14
MD ERROR MESSAGE DISPLAY CONTENT LIST ........................................................................................................... 27
NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 28
TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 28
BLOCK DIAGRAM ............................................................................................................................................................... 29
SCHEMATIC DIAGRAM ...................................................................................................................................................... 30
WIRING SIDE OF P.W.BOARD........................................................................................................................................... 32
VOLTAGE ............................................................................................................................................................................ 35
WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 36
TROUBLESHOOTING ......................................................................................................................................................... 37
FUNCTION TABLE OF IC.................................................................................................................................................... 40
PARTS GUIDE/EXPLODED VIEW
PACKING METHOD (FOR U.K. ONLY)
MD-MT88H(S)
MODEL MD-MT99H(S)/(BL)
CONTENTS
SERVICE MANUAL
SHARP CORPORATION
No. S6138MDMT88HS
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
PORTABLE MINIDISC RECORDER
Illustration: MD-MT88H
Illustration: MD-MT99H

– 2 –
MD-MT88H/99H
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 housing (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.
Precaution to be taken when replacing and servicing the
Laser Pickup.
THEAEL(ACCESSIBLEEMISSIONLEVEL)OFTHELASER
POWEROUTPUTISLESSTHANCLASS1BUTTHELASER
COMPONENT IS CAPABLE OF EMITTING RADIATION
EXCEEDING THE LIMIT FOR CLASS 1. THEREFORE IT IS
IMPORTANTTHATTHEFOLLOWINGPRECAUTIONSARE
OBSERVED DURING SERVICING TO PROTECT YOUR
EYES AGAINST EXPOSURE TO THE LASER BEAM.
(1) When the cabinet has been removed, the power is
turnedonwithouta compact disc, and the Pickup is on
aposition outerthanthelead-in position, theLaserwill
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) NoadjustmenttotheLaserPowershouldbeattempted
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 ofprocedures other than thosespecified
herein may result in hazardous radiation exposure.
SAFETY PRECAUTION FOR SERVICE MANUAL
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
Magnet head
Optical pickup Top Cabinet
,,,
Laser Beam
Optical Pick-Up
Main PWB
Spindle motor
Mechanism
Chassis Magnet Head
Figure 2-1 Figure 2-2
English:
This product is classified as a CLASS 1 LASER PRODUCT.
German:
Dieses Produkt ist ein Laserprodukt der Klasse 1.
French:
Ce Produit est Classifié comme étant un PRODUCTO
LASER DE CLASSE 1.
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.

– 3 –
MD-MT88H/99H
FORACOMPLETEDESCRIPTIONOFTHEOPERATIONOFTHISUNIT,PLEASEREFERTO
THE OPERATION MANUAL.
Specifications for this model are subject to change without prior
notice
SPECIFICATIONS
AC adaptor (AC 230-240 V, 50/60 Hz)
Power source: DC 5 V: AC adaptor (AC 220-230 V, 50/60 Hz)For Europe
For U.K.
DC 1.5 V: Commercially available, "AA" size (LR6), alkaline battery x 1
DC 1.2 V: Optional rechargeable Nickel-Metal Hydride battery (AD-N70BT) x 1
DC 4.5 V: Optional car adaptor, AD-CA20X (for cars with a 12-24 V 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. 3.5 hours (90 %)
Approx. 5.5 hours (fully charged)(When using the AC adaptor included with the unit)
Dimensions: Width: 81.1 mm (3-7/32") Height: 19.9 mm (13/16") Depth: 92.4 mm (3-21/32")
Weight: 147 g (0.32 lbs.) without battery
Input socket: Line/optical digital, microphone (powered by the main unit)
Output socket: Earphones (impedance: 32 ohms)
Type: Portable MiniDisc recorder
Signal readout: Non-contact, 3-beam semiconductor laser pickup
Audio channels: Stereo 2 channels/monaural 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/ATRAC3 (Adaptive TRansform Acoustic Coding), 24-bit computed type
Recording method: Magnetic modulation overwrite method
Sampling frequency: 44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz, and then recorded.)
Wow and flutter: Unmeasurable
(
less than ±0.001 % W. peak
)
Battery life:
Input sensitivity:
Output level:
Stereo 2 times long 4 times long
When using the optional re-
chargeable battery (fully
charged)
Continuous
recording:
Approx. 7.5
hours
Continuous
play: Approx.
13 hours
Continuous
recording:
Approx. 10.5
hours
Continuous
play: Approx.
15.5 hours
Continuous
recording:
Approx. 13.5
hours
Continuous
play: Approx.
17.5 hours
When using a commercially
available, high capacity, "AA"
size (LR6), alkaline battery
Continuous
recording:
Approx. 3
hours
Continuous
play: Approx.
15 hours
Continuous
recording:
Approx. 4.5
hours
Continuous
play: Approx.
17.5 hours
Continuous
recording:
Approx. 7
hours
Continuous
play: Approx.
20 hours
Recording lev-
el 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
Specified
output Maximum output level Load imped- ance
Earphones - 10 mW +
10 mW 32 ohms
LINE 250 mV
(-12 dB) - 10 k ohms
●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
25°C (77°F).
●The operating time when using an alkaline battery
may be different, depending on the type and manufac-
turer of the battery, and on the operating temperature.
MD-MT88H

– 4 –
MD-MT88H/99H
MD-MT99H
Power source: DC 1.2 V: Rechargeable Nickel-Metal Hydride battery (AD-N70BT) x 1
DC 5 V: AC adaptor (AC 220-230 V, 50/60 Hz) For Europe
For U.K.AC adaptor (AC 230-240 V, 50/60 Hz)
DC 1.5 V: Commercially available, "AA" size (LR6), alkaline battery x 1
DC 4.5 V: Optional car adaptor, AD-CA20X (for cars with a 12-24 V 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. 3.5 hours (90 %)
Approx. 5.5 hours (fully charged)(When using the AC adaptor included with the unit)
Dimensions: Width: 81.1 mm (3-7/32") Height: 19.9 mm (13/16") Depth: 92.4 mm (3-21/32")
Weight: 172 g (0.38 lbs.) with rechargeable battery
Input socket: Line/optical digital, microphone (powered by the main unit)
Output socket: Earphones (impedance: 32 ohms)/remote control unit
Type: Portable MiniDisc recorder
Signal readout: Non-contact, 3-beam semiconductor laser pickup
Audio channels: Stereo 2 channels/monaural 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/ATRAC3 (Adaptive TRansform Acoustic Coding), 24-bit computed type
Recording method: Magnetic modulation overwrite method
Sampling frequency: 44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz, and then recorded.)
Wow and flutter: Unmeasurable (less than ±0.001 % W. peak)
Battery life:
Input sensitivity:
Output level:
Stereo 2 times long 4 times long
When using the rechargeable
battery (fully charged) included
with the unit
Continuous
recording:
Approx. 7.5
hours
Continuous
play: Approx.
13 hours
Continuous
recording:
Approx. 10.5
hours
Continuous
play: Approx.
15.5 hours
Continuous
recording:
Approx. 13.5
hours
Continuous
play: Approx.
17.5 hours
When using a commercially
available, high capacity, "AA"
size (LR6), alkaline battery
Continuous
recording:
Approx. 3
hours
Continuous
play: Approx.
15 hours
Continuous
recording:
Approx. 4.5
hours
Continuous
play: Approx.
17.5 hours
Continuous
recording:
Approx. 7
hours
Continuous
play: Approx.
20 hours
Recording lev-
el 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
Specified
output Maximum output level Load imped- ance
Earphones - 10 mW +
10 mW 32 ohms
LINE 250 mV
(-12 dB) - 10 k ohms
●
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
25°C (77°F).
●
The operating time when using an alkaline battery
may be different, depending on the type and manufac-
turer of the battery, and on the operating temperature.
Specifications for this model are subject to change without prior
notice

– 5 –
MD-MT88H/99H
ACCESSORIES
MD-MT88H
MD-MT99H
Notes:
Earphones x 1
AC Adaptor (RADPA8046AWZZ) x 1 (For U.K.)
AC Adaptor (RADPA7045AWZZ) x 1 (For Europe)
Connection Cable (for analogue re-
cording) x 1
●Parts and equipment mentioned in this operation manual other than those detailed above are not included.
●The AC adaptor ma
y
be different from the one in the drawin
g
.
For U.K. For Europe
Notes:
●Parts and equipment mentioned in this operation manual other than those detailed above are not included.
●The AC adaptor ma
y
be different from the one in the drawin
g
.
Remote Control x 1 Earphones x 1 Battery Carrying Case x 1
Rechargeable Nickel-Metal
Hydride Battery (AD-N70BT) x 1 Connection Cable
(for analogue recording) x 1 Connection Cable
(for digital recording) x 1
For EuropeFor U.K.
AC Adaptor (RADPA8046AWZZ) x 1 (For U.K.)
AC Adaptor (RADPA7045AWZZ) x 1 (For Europe)

– 6 –
MD-MT88H/99H
NAMES OF PARTS
■Main unit
1.5V DC Input Socket
2.Optical/Line Input Socket
3.Microphone Input Socket
4.Bass/Delete Button
5.Edit/Auto Mark/Time Mark Button
6.Display/Character Select Button
7.Mode/Charge Button
8.Record/Track Mark Button
9.Volume/Cursor/Fast Forward/Fast Reverse/
Recording Level/Name Select Button
10.Play/Pause Button
11.Stop/Power Off/Hold Button
12.Enter/Fast Play/Synchro Button
13.Earphones/Line Output Socket
14.Open Lever
15.Battery Cover
Illustration: MD-MT88H
Import
-Names of
■Remote control unit (MD-MT99H)
1.Earphones Socket
2.Bass/Delete/Track Mark Button
3.Volume Down/Cursor Button
4.Volume Up/Cursor Button
5.Hold Switch
6.Play/Pause Button
7.Fast Reverse/Recording Level Down/Name Select
Button
8.Fast Forward/Recording Level Up/Name Select
Button
9.Stop/Power Off Button
■Display panel
1.Level Meter
2.Record Indicator
3.Long-play/Recording Mode Indicator
4.Monaural Mode Indicator
5.Repeat Indicator
6.TOC Indicator
7.Synchro Recording Indicator
8.Disc Mode Indicator
9.Disc Name Indicator
10.Track Name Indicator
11.Remaining Recording Time Indicator
12.Total Track Number Indicator
13.Fast Play Indicator
14.Battery Indicator
15.Random Indicator
16.Track Number Indicator
17.Character/Time Information Indicator

– 7 –
MD-MT88H/99H
OPERATION MANUAL
Battery Power
■Charging the rechargeable battery
When the rechargeable battery is used for the first
time or when you want to use it after a long period
of disuse, be sure to charge it fully.
●After the rechargeable battery is charged or used, it
will get slightly warm. This is normal.
●When the portable MD is turned on or operating, the
battery will not be charged.
1
Insert the rechargeable battery.
A rechargeable battery other than the AD-N70BT
cannot be charged.(MD-MT88H)
A rechargeble battery other than the one supplied
or the optional one (AD-N70BT) cannot be
charged.(MD-MT99H)
2
Plug the AC adaptor into the wall socket,
and then insert the plug on the other end
into the DC IN 5V socket.
3
Press the MODE/CHRG button.
" " will flash, and battery will begin charging.
AC 220-230V
50/60 Hz
(For U.K.)
(For Europe)
Illustration: MD-MT88H
■Checking the remaining amount of bat-
tery level
The remaining amount of battery level is shown by the
battery indicator ( ) during operation.
●When the battery is completely discharged, the bat-
tery indicator will flash. Recharge the battery or
replace the alkaline battery with a new one.
●When the battery has run completely out, "BATT
EMPTY" will appear. Then, the power will be discon-
nected automatically.
Notes:
●If you use the battery which you stopped charging
halfway, " " may appear. It does not mean that the
battery is completely charged.
●The battery indicator will not correctly display the
remaining capacity for approximately 10 seconds after
the power has been turned on.
●When the AC adaptor 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, depending on the operation
being performed. This is normal.
■Using with the rechargeable or alkaline
battery
Notes:
●Setting the volume level to "0" whilst recording with the
rechargeable or an alkaline battery reduces the bat-
tery drain.
●When you do not use the unit for hours, remove the
battery. (The battery drains gradually even when the
power is turned off.)
●This unit can be used with the AC adaptor when the
●Carry the battery in the supplied case.(MD-MT99H)
rechargeable or an alkaline battery is in the unit.
Caution:
Do not use a nickel-cadmium battery.
1
Disconnect the AC adaptor.
2
Insert the rechargeable bat-
tery or alkaline battery from
the (+) marked side.
Use a commercially available LR6,
"AA" size alkaline battery.

– 8 –
MD-MT88H/99H
Error Messages
Number or symbol appears in (*) position.
ERROR MES-
SAGES MEANING
BATT EMPTY ●The battery has run down.
BLANK MD ●Nothing is recorded.
(Replace the disc with a recorded disc.)
Can't COPY ●You tried to record from a copy prohib-
ited MiniDisc.
●You tried to record signals other than
music (such as data).
(Record using the analogue cable.)
Can't EDIT ●A track cannot be edited.
(Changethestoppositionofthetrackand
then edit it.)
Can't READ (*) ●The disc data cannot beread because
the disc or unit is damaged.
(Reload the Minidisc or replace it with an-
other one.)
Can't REC ●Recording cannot be performed cor-
rectly due to vibration or shock.
ERROR MES-
SAGES MEANING
Can'tSTAMP ●Stamp function does not work.
(Check the number of tracks.)
Can'tWRITE ●Cannot save the TOC information cor-
rectly to a MiniDisc.
DEFECT ●The disc is scratched.
(If the recorded sound is not right, retry
recording or replace the disc with a re-
cordable one.)
DISC FULL ●The disc is out of recording space.
Er-MD (**) ●The microprocessor has reported a
system fault and the unit is out of or-
der.
(To have it repaired, go to the distributor
where you purchased the unit.)
HOLD ●The unit is in the hold mode.
LOCKED ●You removed a MiniDisc whilst record-
ing or editing.
(Turn off the power and remove the Mini-
Disc.)
NO DISC ●A disc has not been loaded.
Number or symbol appears in (*) position.
ERROR MES-
SAGES MEANING
NO SIGNAL ●Poor connection of the digital cable.
●No output signal comes out from the
connected unit to playback.
(Use the AC power for the connected
unit.)
●The input signal has improper sam-
pling frequency.
NOT PLAY ●You tried to play back a track that can-
not be played with this equipment.
PLAY MD ●You recorded on a playback-only disc.
POWER ? ●Improper power is being supplied.
PROTECTED ●The write protection tab of a MiniDisc
is set to the protected position.
●You tried to record on a playback-only
disc.
SORRY ●Since a track number is currently be-
ing located or updated, the unit cannot
accept your command.
(Wait for a whilst and try the operation
again.)
ERROR MES-
SAGES MEANING
TEMP OVER ●The temperature is too high.
(Turn off the power, and wait for a whilst.)
TOC FORM
(**) ●There is an error in the recording sig-
nal.
(Erase all of the tracks, and then record
again.)
TOC FULL ●There is no space left for recording
character information (track names,
disc names, etc.).
Tr. Protect ●The track has been protected from be-
ing erased.
(Edit the track with the device on which it
was recorded.)
? DISC ●A disc which contains data other than
music was played.
(A disc which contains nonmusic data
cannot be played.)
●Thereisanerrorinthesignalrecorded
on the disc.

– 9 –
MD-MT88H/99H
MiniDisc System Limitations
The unit may have the following symptoms whilst recording or editing. The unit is not out of order.
SYMPTOM LIMITATIONS
"DISC FULL" or "TOC FULL" appears
even though the MiniDisc still has re-
cording time left.
More than 255 tracks (maximum) cannot be recorded regardless of
the recording time.If the MiniDisc is recorded or editedrepeatedly or
if it has scratches (recording skips scratched parts), you may not be
able to record the maximum tracks above.
The remaining recording time does not
increase even though you erased
tracks.
The unit does not count non-recorded portions that last 12 or fewer
seconds to display the remaining recording time. The time may not
increase even if you erase short tracks.
The total of the recorded time and the
remaining time does not match the max-
imum recordable time.
One cluster (approximately 2 seconds) is the minimum unit for re-
cording. For example, a 3-second track uses 2 clusters (approxi-
mately 4 seconds). Therefore, the actual recordable time may be
shorter than the displayed time.
Combine function does not work. A MiniDisc on which recording and editing are repeated may not al-
low the combine function.
Sound skips in fast reverse/forward. One track is dividedandrecordedinseparateplaces onarepeatedly
recorded or edited MiniDisc. Sound may skip.
A track number is created in the middle
of a track. A track number may be created if there are scratches or dust on the
MiniDisc.
MiniDisc System Limitations
The unit may have the following symptoms whilst recording or editing. The unit is not out of order.
SYMPTOM LIMITATIONS
"DISC FULL" or "TOC FULL" appears
even though the MiniDisc still has re-
cording time left.
More than 255 tracks (maximum) cannot be recorded regardless of
the recording time.If the MiniDisc is recorded or editedrepeatedly or
if it has scratches (recording skips scratched parts), you may not be
able to record the maximum tracks above.
The remaining recording time does not
increase even though you erased
tracks.
The unit does not count non-recorded portions that last 12 or fewer
seconds to display the remaining recording time. The time may not
increase even if you erase short tracks.
The total of the recorded time and the
remaining time does not match the max-
imum recordable time.
One cluster (approximately 2 seconds) is the minimum unit for re-
cording. For example, a 3-second track uses 2 clusters (approxi-
mately 4 seconds). Therefore, the actual recordable time may be
shorter than the displayed time.
Combine function does not work. A MiniDisc on which recording and editing are repeated may not al-
low the combine function.
Sound skips in fast reverse/forward. One track is dividedandrecordedinseparateplaces onarepeatedly
recorded or edited MiniDisc. Sound may skip.
A track number is created in the middle
of a track. A track number may be created if there are scratches or dust on the
MiniDisc.
Troubleshooting
Many potential "problems" can beresolved by the owner without calling a service technician. If something seems to be wrong
with this product, check the following before calling your authorised SHARP dealer or service centre.
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?
No sound is heard from the earphones.
●Is the volume set too low?
●Is the earphones plugged in? (MD-MT88H)
●Is the remote control unit or the earphones plugged
in? (MD-MT99H)
●Are youtrying to playa MiniDiscwith dataon itinstead
of a MiniDisc containing music?
When the operation buttons are pressed, the unit does
not respond.
●Is the unit in the hold mode?
●Is the battery exhausted?
●Is the earphones plug inserted firmly? (MD-MT88H)
●Is the remote control unit plug or the earphones plug
inserted firmly? (MD-MT99H)
Some sounds are skipped.
●Is the battery exhausted?
●Is the unit being subjected to excessive vibration?
The MiniDisc cannot be ejected.
●Has the track number or character information been
written on the disc yet?
●Is the unit in the recording or editing mode?
Recording and editing are impossible.
●Is the MiniDisc protected against accidental erasure?
●Is the unit connected properly to the other equipment?
●Is the AC adaptor unplugged or dida power failure oc-
cur whilst recording or editing?
●Is the unit in the hold mode?
●Is an optical signal being output from the stereo sys-
tem? Read the operation manual for the stereo sys-
tem.

– 10 –
MD-MT88H/99H
1 Inserting a MiniDisc
1 Slide the OPEN lever to re-
lease the compartment door.
2 Lift it up.
3 Insert a MiniDisc as shown.
4 Close the compartment door.
33
222 441
Insert according to
the direction arrow.
When you record on a MiniDisc,
check that the erase prevention tab
is set to the “Recordable” position.
Recordable Recording
prevented
Illustration: MD-MT88H
2
1
2 Connect the AC adaptor
To the DC IN 5V socket.
AC 230-240V,
50/60 Hz
AC 220-230V,
50/60 Hz Insert securely, all the way in.
To the wall socket.
1 Plug the AC adaptor into the
wall socket.
2 Insert the plug on the other
end into the DC IN 5V socket.
(For U.K.)
(For Europe)
Illustration: MD-MT88H
Preparation for use
The unit does not work
if the unit is in the hold mode.
Hold
Release
CAUTION:
It is not recommendable to put the
MiniDisc into a rear pocket, as this
maydamagethe productwhensitting.
Press the HOLD button for 2 seconds or more.
Illustration: MD-MT88H
LINE OUT
LEFTRIGHT
OPTICAL/
LINE IN
3 Connections
To a stereo system with “LINE OUT” or “AUDIO
OUT” sockets.
Note:
If the audio system has only one pair of sockets they
are usually for input only and recording via this connec-
tion is not possible.
Red: To Right
White: To Left
Illustration: MD-MT88H

– 11 –
MD-MT88H/99H
Recording
Check that the unit is connected to the stereo system.
1 Press the REC button.
2 Begin playback on the stereo system connected to this por-
table MD.
3 Press the 55
55
5or 44
44
4button to adjust the recording level.
Adjust the recording level so that the maximum sound volume from the
source makes the reading swing somewhere between – 4 dB and 0 dB.
0dB
4dB
This unit can adjust the digital recording level just the same as the ana-
logue recording.
Level meter indicator
Illustration: MD-MT88H
Recording: continued
4 Press the PAUSE button on the stereo system to enter the play-
back pause mode.
Here you can search for the track to record.
5 Press the MODE/CHRG button repeatedly to select the record-
ing mode.
6 Press the PLAY/PAUSE button to start the MiniDisc unit recording.
7 Beginplayback on the stereosystem, the output will be recorded.
To stop recording
Press the ■/ :OFF button.
●When recording stops, “TOC” ap-
pears. Whilst “TOC” appears, the
MiniDisc recorded contents have
not yet been updated.
●To prevent the new recording from
being lost, it is not possible to re-
move the MiniDisc whilst “TOC” is
displayed.
About the TOC
After any recording or editing function,
“TOC”(TableOfContents)is displayed.
To finalisetherecordingor editing func-
tion, press the
■/ :OFF button. During
thisprocess“TOC”will flash and “TOC
EDIT!” will be displayed.
During any recording or editing func-
tion,theMiniDiscunitlidislocked,and
the MiniDisc cannot be removed until
the process is finalised.
Warning:
If the power is removed (Battery/AC
adaptor)whilst“TOC”is displayed, the
MiniDiscunitlidwillremainlocked until
thebattery/mainpowerisrestoredand
the unit is turned on. Your new record-
ings or edited changes will be lost and
your MiniDisc may become unusable.
To update the recorded contents
of the MiniDisc
Press the ■/ :OFF button whilst in
the stop mode.
●The power turns off after recorded
contentshavebeenupdated onthe
MiniDisc.
TOC display
Playback
1Insert the earphones plug into the PHONES socket.
2Insert a MiniDisc.
3Press the PLAY/PAUSE button.
Playback starts automatically with a playback only MiniDisc or a MiniDisc
which is protected against accidental erasure (Auto-play function).
To stop playback
Press the ■ / :OFF button.
If the unit is not operated for at least 2
minutes whilst in the stop mode, the
power will shut off automatically.
MD-MT88H Playback
1Insert the earphones plug firmly into the earphones socket on
the remote control unit.
2Plug the remote control into the REMOTE socket on the unit.
3Insert a MiniDisc.
4Press the PLAY/PAUSE button.
Playback starts automatically with a playback only MiniDisc or a MiniDisc
which is protected against accidental erasure (Auto-play function).
To stop playback
Press the ■ / :OFF button.
If the unit is not operated for at least 2
minutes whilst in the stop mode, the
power will shut off automatically.
MD-MT99H

– 12 –
MD-MT88H/99H
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 position the
wires in the same location.
Use the specified screws to fix the cabinet and the
mechanismunit.Theuseof the screwswithlengthother
than specified may cause contact with the mechanism
unit resulting in malfunction.
3.Whenrepairing,paycloseattentionsonottodamagethe
IC from static electricity.
Caution:
Carefullyhandle the mainPWB 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.
(C1) x3
ø1.7 x2.5mm
(C1) x1
ø1.4 x2.5mm (B2) x2
(C2) x1
(C3) x1
(C3) x1
(C2) x1*
Pull
Pull Pull
Pull
Pull
Felt Put the fold on the connector, and apply
with the felt. Sagging may result in contact
with the sheet metal.
Main PWB
Center Cabinet
(D1) x1
ø1.4 x1.5mm (D1) x1
ø1.4 x1.5mm
Mechanism Unit
Center Cabinet
1 Bottom Cabinet 1. Screw .....................(A1) x6 12-1
2 Top Cabinet 1. Open the Top cabinet. 12-1
2. Screw .....................(B1) x4
3. Flexible PWB..........(B2) x2 12-2
3 Main PWB 1. Open the Battery Lid. 12-1
2. Screw .................... (C1) x4 12-2
3. Flexible PWB......... (C2) x2
4. Soldering ............... (C3) x2
4 Mechanism Unit 1. Screw .................... (D1) x2 12-3
2. Raise the rear part, and
remove in the arrow direction.
REMOVAL PROCEDURE
STEP FIGURE Figure 12-1
Figure 12-2
Figure 12-3
(A1) x2
ø1.4 x2mm
(A1) x2
ø1.4 x2mm
(A1) x1
ø1.4 x2mm
(B1) x2
ø1.4 x2mm
(B1) x2
ø1.4 x2mm
(A1) x1
ø1.4 x2mm
Top Cabinet
Bottom Cabinet
Battery Lid
Open Lever

– 13 –
MD-MT88H/99H
REMOVING AND REINSTALLING THE MAIN PARTS
Removethemechanismaccordingtothedisassemblingmeth-
ods 1 to 4. (See Page 13.)
How to reinstall the optical pickup
(See Fig. 13-5.)
1. Remove the screw (E1) x 1 pc., and remove the spring.
2. Slowly raise the optical pickup.
Howtoremovethemagnetichead(SeeFig.13-4.)
1.Remove the screws(D1) x 2pcs. of themagnetic head and
theopticalpickup,andremovethesolderjoints(D2)x2pcs.
of the head flexible plate.
Note:
Mount carefully so as not to damage the magnetic head.
How to remove the Lift motor (See Fig. 13-2.)
1. Remove the solder joints (B1) x 2 of lift motor lead wire.
2. Remove the screw (B2) x 1 pc., and remove the lift motor.
Note:
Take care so that the motor gear is not damaged.
(If the gear is damaged, noise is caused.)
How to remove the sled motor (See Fig. 13-3.)
1.Removethestopwasher (C1) x1pc.,andremove the drive
gear (C2) x 1 pc.
2. Remove the screws (C3) x 2 pcs.
3. Remove the solder joints (C4) x 2 of flexible PWB., and
remove the sled motor.
Note:
Take care so that the motor gear is not damaged.
(If the gear is damaged, noise is caused.)
Howto removethe spindlemotor (SeeFig. 13-1.)
1. Remove the solder joints (A1) x 4 of flexible PWB.
2. Remove the screws (A2) x 3 pcs., and remove the spindle
motor.
(B2) x1
ø1.4 x4.5mm
MD Mechanism
Remove the
Solder joints
(B1)x2
Lift Motor
(C3) x2
ø1.4 x1.2mm
Stop Washer
(C1)x1
Sled Motor
Drive Gear
(C2)x1
MD Mechanism
Mechanism Flexible
PWB Solder joints
(C4)x2
(D1) x2
ø1.4 x1.8mm
Solder joints
(D2)x2
Magnetic head
MD Mechanism
(E1) x1
ø1.7 x3mm
MD Mechanism
Optical Pickup Unit
Spring
(A2) x3
ø1.4 x2.5mm
Mechanism Flexible
PWB Solder joints
(A1)x4
Spindle
Motor
MD Mechanism
Figure 13-1
Figure 13-2
Figure 13-3
Figure 13-4
Figure 13-5

MD-MT88H/99H
– 14 –
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 START [ 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 [ Z 0 4 A b X ]
(4) Whole LCD lighting for 2 seconds
(5) Test Mode START [ 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.
Test Mode
Microcomputer version
Shipping setting method
Holding down simultaneously the VOLUME –Button and PLAY Button of the set unit without disc, supply the power from the DC IN plug.
After the indication "INIT" -> "BYE OK" disappears, release the power supply of DC IN.
1. AUTO 1 Mode • Perform preliminary automatic adjustment.
• If the combination of mechanism and pickup
PWB has been changed, be sure to start from
AUTO1.
2. AUTO 2 Mode • Perform ATT (attenuator) automatic adjustment.
• Perform continuous playback (error rate display,
jump test)
3. TEST-PLAY Mode • Continuous playback from the specified address
is performed.
• 1 line, 10 lines or 384 lines manual jump is
performed.
• C1 error rate display (pit section), ADIP error
rate display (groove section)
• The temperature correction is performed only when
servo start is performed, but the posture correction
is not performed during continuous playback.
4. TEST-REC Mode • Continuous record from the specified address
is performed.
• Change of record laser output(servo gain is also
changed according to laser output).
• The temperature correction is performed only
when servo start is performed, but the posture
correction is not performed during continuous
recording.
5. MANUAL 1 Mode • Temperature is displayed. (Updating in real time)
• Seeing the displayed adjustment value, perform
preliminary manual adjustment.
(Error rate indication, jump test)
6. MANUAL 2 Mode • Temperature is displayed. (Updating in real time)
• Seeing the displayed adjustment value perform
manfully the preliminary adjustment.
(Error rate indication, jump test)
• Continuous playback is performed
(Error rate display, jump test).
7. RESULT 1 Mode • The value adjusted in AUTO1 or MANUAL1 is
indicated.
• (Execution in servo "OFF" state").
8. RESULT 2 Mode • The value adjusted in AUTO 2 or MANUAL 2 is
indicated.
• Adjustment value is changed manually.
(Error rate display, jump test).
9. DIGITAL INPUT Mode • Digital input information is displayed.
10. ERROR INFORMATION • Error information is displayed.
Mode • Error information is initialized
11. NORMAL Mode • The mode is changed from the TEST mode to
the normal mode without adjustment.
• In the normal mode the internal operation mode,
memory capacity, etc. areindicated.
• In the normal mode both temperature correction
and posture correction are perfomed.
12. EEPROM Mode • Factors of digital servo are changed manually.
(Each servo is turned on individually.)
• Cut-off frequency of BASS1, BASS2 and BASS3
is selected manually.
• Temperature detection terminal voltage is
measured, and the reference value is set.
• Defaults are selected and set.
• Setting of EEPROM protect area is updated.
(In case of protect releasing)
13. INNER Mode • Determine the position where the INNER switch
is turned on. (Only high reflection disc).
• The temperature correction is performed only
when servo start is performed, but the posture
correction is not performed.

MD-MT88H/99H
– 15 –
• 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 disc
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 FAST FORWARD/FAST REVERSE /
button changes as follows.
0032 →0032 →0032 →0320 →........
• When the FAST FORWARD 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 FAST REVERSE 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 FAST FORWARD/FAST REVERSE /
button is held down, the setting changes continuously,
one cycle being 100 ms.
Operation in each TEST mode
1. AUTO1 Mode
•When the STOP button is pressedwhile the AUTO1 menu
appearsor during automaticadjustment, the modechanges
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.
Atthistimereleasethe 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 pressedwhile the AUTO2 menu
appearsor during automaticadjustment, the modechanges
to the TEST mode stop state. At this time the adjustment
value is not output.
• Adjustment NG; Adjustment item out of range, and adjust-
ment 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
isdisplayed,continuousplaybackisperformedaftersearch-
ing that address.
•EachtimetheMODEbuttonispressedwhiletheTEST-PLAY
modetargetaddressisdisplayed,thedigitwhich is changed
by pressing the FAST FORWARD/FAST REVERSE /
button is changed as follows.
0032 →0032 →0032 →0032 →........
• When the FAST FORWARD button is pressed in the
TEST-PLAY mode target address is displayed, the digit of
address specified by the MODE button is set to +1h. (0 to F)
• When the FAST REVERSE button is pressed in the
TEST-PLAY mode target address is displayed, the digit of
address specified by the MODE button is set to -1h. (0 to F)
* When the FAST FORWARD/FAST REVERSE /
button is held down, the setting changes continuously, one
cycle being 100 ms.
• When the BASS button is pressed in the continuous play-
back mode, the number of jump lines changes as follows.
1 →10 →384 →1 →........
* Afterthenumber ofjumplines is indicatedforone second,
the address indication is restored [ T R _ ]
• When the FAST FORWARD button is pressed in the
continuous playback mode, the specified number of lines
is jumped in the FWD direction.
• When the FAST REVERSE button is pressed in the
continuous playback mode, the specified number of lines
is jumped in the REV direction.
* When the FAST FORWARD/FAST REVERSE /
button is held down, jump is repeated every
approx. 100 ms.

MD-MT88H/99H
– 16 –
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 FAST REVERSE button is pressed
• When the STOP button is pressed while the error data
indication menu appears or during error data indication, the
mode changes to the TEST mode stop state.
• Error data 0 is the latest error.
• Error which occurred in the TEST mode is also stored in the
memory.
• When the DISP button is pressed while the error data
indication menu appears, the error data is initialized.
[ C L E A R _ ]
• : Error Code
Explanation of error history code
13h : Excessive number of retry to draw servo during its
adjustment.
16h : COUT detection time over during servo adjustment.
17h : The level of input signal from the RF amplifier is out of
the allowable range.
1Fh :Cannot clear the factor of ENDEC DINT.
21h : Cannot focus on the disc.
22h : Cannot start up the spindle.
23h : Track search time over.
32h : Cannot read P-TOC.
42h : Cannot read U-TOC.
44h : Cannot write U-TOC.
45h : Cannot perform write test of U-TOC.
52h : Cannot write SD. (Sound Data)
71h : Time over during initialization of the pickup position.
72h : Check sum error occurred when reading EEPROM.
73h : Cannot operate the recording head (by using the EJECT
lever).
91h : The ambient temperature is out of the allowable range.
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-MT88H/99H
– 17 –
EEPROM (IC402) writing procedure
1. Procedure to replace EEPROM and write initial
value of microcomputer in EEPROM
(1) Replace EEPROM.
(2) Refer to the latest EEPROM data list.
(3) Press the Display button, ENTER button and Play
button to start the test mode.
(4) Press the VOL. +key, version display
[ V e r . ]
EEPROM version (b ~ Z)
MicrocomputerROMversion
(5) Press the VOL. –key, the whole LCD lights.
(6) Test mode stop state.
[ T E S T ]
(7) Press the "BASS" button, and press twice the "FAST
REVERSE " button.
[ E E P R O M ]
(8) Performtheoperationtodisplay"EEPROMSETTING
MODE CHART", compare the EEPROM DATA LIST
with the display, and set according to the EEPROM
DATA LIST with the VOL. +or VOL. –button.
(9) Set the temperature reference. (Refer to the Tem-
perature Reference Setting Method.)
(10) Set according to the EEPROM DATA LIST.
(11) Press the Stop button.
[ T E S T ]
(12) Press the Stop button.
(13) After data is written in EEPROM, turn off power .
(14) Restore protection of EEPROM.
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
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, FAST REVERSE
x 3 times, PLAY , PLAY in the test mode
STOP state.
• 'TM§§ ' is displayed. (§§= Temperature code,
= Temperature reference)
(3) Once press FAST FORWARD , and determine
the displayed microcomputer TEMP input AD value.
• 'TPin##' is displayed. (## = TEMP input AD value)
(4) At the ambient temperature, determine the tempera-
ture corrected value from the temperature measure-
ment value correction table.
(5) Determine the temperature reference, using the fol-
lowing formula.
• Temperature reference = Microcomputer TEMP
input AD value + Temperature corrected value
(6) Set the temperature reference value by button opera-
tion, and check whether the temperature code indica-
tion corresponds to "Temperature Code Identification
Table".
[2] Temperature measurement value correction table
[3] Temperature code identification
X

MD-MT88H/99H
– 18 –
EEPROM DATA LIST (EEPROM version c)
TEMP setting ADJ. SET setting
Item display Set values
C O K _ 2 8 H
F A B _ 6 4 H
F B O _ F C H
H S G _ 1 1 H
L S G _ 1 2 H
C T 0 _ 8 2 H
C T 1 _ 8 1 H
C T 2 _ 3 0 H
B P 1 _ 7 D H
B P 2 _ 6 F H
B P W _ 6 6 H
B P S _ 5 F H
B P E _ 5 D H
B R 1 _ 7 E H
B R 2 _ 7 7 H
B R W _ 7 2 H
B R S _ 6 E H
B R E _ 6 1 H
P L E _ A 6 H
R C E _ 9 4 H
S D F _ 1 F H
P W L _ 0 1 H
C G 1 _ A 5 H
C H V _ 3 6 H
R C 0 _ C 0 H
R C 1 _ F E H
U S A _ 1 8 H
B S 0 _ 1 7 H
B S 1 _ 7 0 H
B C 0 _ 0 1 H
B C 1 _ D C H
B C 2 _ 0 5 H
B M K _ 1 E H
B E C _ 0 0 H
R 2 0 _ 8 0 H
R 2 1 _ 2 0 H
R 4 0 _ B F H
R 4 1 _ 0 2 H
F B L _ 1 6 H
M C 2 _ 0 0 H
M C 4 _ 0 0 H
L 2 H _ 8 1 H
L 4 H _ 8 0 H
M F P _ ◊◊H
S P M _ ◊◊H
M S L _ ◊◊H
U S 0 _ ◊◊H
U S 1 _ ◊◊H
U S 2 _ ◊◊H
Control setting
Item display Set values
Sled setting
Item display Set values
T M _ _ Calculate values
Tracking setting
Item display Set values
T G 1 _ 2 4 H
T B o _ 2 B H
T B t _ 1 A H
T K o _ 2 B H
T K t _ 1 6 H
T D o _ 6 7 H
T D t _ 3 A H
S C t _ 2 A H
C L p _ 2 8 H
C L r _ 3 2 H
J P I _ 0 8 H
K 1 0 _ 6 5 H
T H P _ 0 2 H
T H G _ 0 2 H
T 0 P _ 0 0 H
T 0 G _ F 2 H
T 1 P _ 2 0 H
Spindle setting
Focus setting
F G 1 _ 4 A H
F Z H _ E D H
F L n _ 0 9 H
F L p _ 0 6 H
F T s _ 2 0 H
F S B _ 4 8 H
F T B _ 3 8 H
T O 1 _ 3 2 H
T O R _ 3 8 H
Item display Set values
S P G _ 1 A H
S P i _ 7 A H
S P m _ 5 1 H
S P o _ 3 8 H
S D 1 _ 7 F H
S D 2 _ 7 F H
S P K _ E 0 H
S P W _ 0 F H
S P B _ 3 2 H
S R i _ 9 A H
S R m _ 6 B H
S R o _ 6 B H
S B R _ 6 6 H
O S L _ 1 4 H
Item display Set values
S L G _ 7 0 H
S L 2 _ 2 0 H
S L M _ 5 0 H
S K k _ 5 0 H
S K t _ 4 A H
S K m _ 5 0 H
W T m _ 2 4 H
S B L _ 4 8 H
M V 1 _ 4 4 H
M V 2 _ 8 8 H
S L V _ 3 8 H
S L T _ 6 5 H
S L P _ 4 C H
M V T _ 0 1 H
A S G _ F 0 H
A S M _ F 0 H
Item display Set values ◊◊H : CHECK-SUM

MD-MT88H/99H
– 19 –
: 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
FAST FORWARD FAST REVERSE
FAST REVERSE
FAST FORWARD FAST REVERSE
FAST FORWARD FAST REVERSE
FAST FORWARD FAST REVERSE
FAST FORWARD FAST REVERSE
T R E C
FAST FORWARD FAST REVERSE
: Continuous playback menu
T P L A Y
FAST FORWARD FAST REVERSE
FAST FORWARD FAST REVERSE
FAST FORWARD FAST REVERSE
: Digital input signal monitor menu
D i n M o n
FAST FORWARD FAST REVERSE
E E P R O M
FAST FORWARD FAST REVERSE
I N N E R
FAST FORWARD
FAST FORWARD
FAST REVERSE
FAST REVERSE
FAST FORWARD
* 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-MT88H/99H
– 20 –
: 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
MODE
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)
: Focus balance Adjustment mode
: Focus balance
# # # : Jitter error
PLAY
b # # #
: 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 H0 7 0 0 H0 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 [MODE] 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 [FAST FORWARD/REVERSE / ] button is pressed.
* When the [FAST FORWARD ] button is pressed in the continued playback mode, jump of specified
number of lines occurs in the external periphery direction.
If the key is held down jump occurs continuously (100 ms cycle).
* When the [FAST REVERSE ] button is pressed in the continuous playback mode, jump of
specified number of lines occurs in the internal periphery direction.
If the key is held down, jump occurs continuously (100 ms cycle).
A d 0 9 5 0 H
0 9 5 0 H