Sharp MDMT-16-E, MDMT-20-H Service manual
Illustration: MD-MT20H
MD-MT20H/16E
SERVICE MANUAL
No. S5933MDMT20H/
MD-MT20H(BL)
MD-MT20H(GL)
MD-MT20H(S)
MD-MT16E(S)
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
DIFFERENCE BETWEEN
MD-MT16E AND MD-MT20H
MD-MT20H
Illustration: MD-MT16E
SECTION
Optical Digital cable None Used
Remote Control None Used
Rechargeable Battery None Used
Battery Carrying Case None Used
AC Adapter None Used
AC Adapter Pad None Used
MD-MD16E
CONTENTS
SAFETY PRECAUTION FOR SERVICE MANUAL ............................................................................................................... 2
SPECIFICATIONS ................................................................................................................................................................. 3
NAMES OF PARTS ............................................................................................................................................................... 4
OPERATION MANUAL (FOR MD-MT20H) ........................................................................................................................... 5
DISASSEMBLY...................................................................................................................................................................... 8
REMOVING AND REINSTALLING THE MAIN PARTS......................................................................................................... 9
ADJUSTMENT ...................................................................................................................................................................... 10
NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 23
TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 23
VOLTAGE ............................................................................................................................................................................ 24
BLOCK DIAGRAM ............................................................................................................................................................... 25
SCHEMATIC DIAGRAM ...................................................................................................................................................... 26
WIRING SIDE OF P.W.BOARD........................................................................................................................................... 29
WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 34
TROUBLE SHOOTING ........................................................................................................................................................ 35
FUNCTION TABLE OF IC.................................................................................................................................................... 38
CIRCUIT DESCRIPTION ..................................................................................................................................................... 40
PARTS GUIDE/EXPLODED VIEW
PACKING METHOD (MD-MT20H/MT16E FOR U.K. ONLY)
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-MT20H/16E
SAFETY PRECAUTION FOR SERVICE MANUAL
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.
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
LASER KLASSE 1
LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT
(For Europe)
VAROITUS! LAITTEEN KÄYTTÄMINEN MUULLA KUIN TÄSSÄ KÄYTTÖOHJEESSA
MAINITULLA TAVALLA SAATTAA ALTISTAA
KÄYTTÄJÄN TURVALLISUUSLUOKAN 1 YLITTÄVÄLLE
NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE.
VARNING - OM APPARATEN ANVÄNDS PÅ ANNAT SÄTT ÄN I DENNA BRUKSANVISNING
SPECIFICERAS. KAN ANVÄNDAREN UTSÄTTAS FÖR OSYNLIG LASERSTRÅLNING, SOM
ÖVERSKRIDER GRÄNSEN FÖR LASERKLASS 1.
(For U.K.)
VARO ! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.
VARNING! Osynlig laserstralning när denna del är öppnad och spärren är urkopplad. Betrakta ej strälen.
Precaution to be taken when replacing and servicing the laser pickup.
The following precautions must be observed during servicing to protect your eyesagainst exposure to the laser.
Warning of possible eye damage when repairing:
If the AC adaptor or batteries are connected when the top houising (disc cover) of the unit is removed, and the PLAY key is
pressed, the laser will light up during docus access (2-3 seconds). (Fig. 2-1) During the operation, the laser will lesk from the
opening btween the magnetic head and the mechanical chassis (Fig. 2-2). In order to protect your eyes, you most not look
at the laser durnd repaor. Before repaoring be sure to disconnect the AC adaptor and remove the batteries.
Magnet head
Mechanism
Chassis
Optical pick-up
Top Cabinet
Spindle motor
Figure 2-1 Figure 2-2
– 2 –
Magnet Head
Main PWB
Lasar Beam
Optical Pick-Up
■ General
Unmeasurable (less than ±0.001% W. peak)
● The continuous recording time is for analogue inputs when the volume level is set to
“VOL 0”.
● The continuous play time shows the value when the volume level is set to “VOL 15”.
● The above values are the standard values when the unit is charged and used at an
ambient temperature of 20°C (68°F).
● The operating time when using an alkaline batteries may be different, depending on
the type and manufacturer of the battery, and on the operating temperature.
Input sensitivity:
Recording level Reference input level Input impedance
MIC H 0.25 mV 10 k ohms
MIC L
2.5 mV 10 k ohms
LINE 100 mV 20 k ohms
Output level:
Specified
output
Maximum
output level
Load
impedance
Earphones — 10 mW + 10 mW 32 ohms
LINE
250 mV
(-12dB)
—
10 k ohms
Dimensions: Width: 87.9 mm (3-7/16")
Height: 29.8 mm (1-3/16")
Depth: 79.7 mm (3-1/8")
Weight: (MD-MT20H) 235 g (0.52 lbs.) with rechargeable battery
Input socket: Line/optical digital, microphone (powered by the main unit)
Output socket: Earphones (impedance: 32 ohms)/remote control unit
■ MiniDisc Recorder
Type: Portable MiniDisc recorder
Signal readout: Non-contact, 3-beam semi-conductor laser pick-up
Audio channels: Stereo 2 channels/monaural (long-play mode) 1 channel
Frequency response:
20 – 20,000 Hz (± 3 dB)
Rotation speed: Approx. 400 – 900 rpm
Error correction: ACIRC (Advanced Cross Interleave Reed-Solomon Code)
Coding: ATRAC (Adaptive T ransform 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:
Weight: (MD-MT16E) 180 g (0.40 lbs.) without battery
Power source:
(MD-MT20H for U.K.)
Power source:
(MD-MT20H for Europe)
Power consumption:
Output power:
Charging time:
MD-MT20H/16E
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO
THE OPERATION MANUAL.
SPECIFICATIONS
DC 2.4V: Rechargeable Nickel-Metal Hydride battery x 1
DC 5V: AC adaptor (AC 230 - 240V, 50/60 Hz)
DC 3.0V: Commercially available, “AA” size, alkaline bat-
DC 4.5V: Separately available car adaptor, AD-CA20X
DC 2.4V: Rechargeable Nickel-Metal Hydride battery x 1
DC 5V: AC adaptor (AC 220 - 230V, 50/60 Hz)
DC 3.0V: Commercially available, “AA” size, alkaline bat-
DC 4.5V: Separately available car adaptor, AD-CA20X
7 W (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)
tery x 2
(
for cars with a 12-24V DC negative earth electrical
system)
tery x 2
(
for cars with a 12-24V DC negative earth electrical
system)
Battery life:
Power source:
(MD-MT16E)
Power consumption:
(MD-MT16E)
Output power:
(MD-MT16E)
Charging time:
(MD-MT16E)
Battery life:
(MD-MT16E)
When using the rechargeable
battery (fully charged) included
with the unit
Continuous recording:
Approx. 7.5 hours
Continuous play:
Approx. 12 hours
DC 2.4V: Optional Rechargeable Nickel-Metal Hydride batDC 3.0V: Commercially available, “AA” size, alkaline batDC 4.5V: Optional car adaptor, AD-CA20X
DC 5V: Optional AC adaptor (AD-T20APE, AC 230 - 240V,
7 W (Optional 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)
tery (AD-T20BT) x 1
tery x 2
for cars with a 12-24V DC negative earth electrical
(
system)
50/60 Hz)
When using two, commercially
available, high capacity, “AA”
size, alkaline batteries
Continuous recording:
Approx. 7.5 hours
Continuous play:
Approx. 15 hours
When using two, commercially
available, high capacity, “AA”
size, alkaline batteries
Continuous recording:
Approx. 7.5hours
Continuous play:
Approx. 15 hours
When using the optional rechargeable battery AD-T20BT
(fully charged)
Continuous recording:
Approx. 7.5 hours
Continuous play:
Approx. 12 hours
Specifications for this model are subject to change without prior
notice
– 3 –
MD-MT20H/16E
■ 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
NAMES OF PARTS
Illustration: MD-MT20H
11
12
13
14
123456
15 16
17
19
18 20 21
7
8
9
10
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. V olume Down/Cursor/Charge Button
24. Record/Track Mark Button
25. Fast Reverse/Recording Level Down/
Name Select Button
26. Stop/Power Off Button
27. Play/Pause Button
28. Fast Forward/Recording Level Up/
Name Select Button
29. Open Lever
30. Remote Control/Earphones Socket
31. Optical/Line Input Socket
32. Microphone Input Socket
33. Hold Switch
34. 5V DC Input Socket
35. Battery Cover
29
22
23
28
27262524
30
31
32
33
34
35
■ Remote control unit (MD-MT20H Only)
1. Earphones Socket
2. Fast Reverse/Recording Level Down/
Name Select Button
3. Hold Switch
4. Play/Pause Button
5. Fast Forward/Recording Level Up/
Name Select Button
6. Stop/Power Off Button
7. Volume Up/Cursor Button
8. Bass/Delete/Track Mark Button
9. Volume Down/Cursor Button
– 4 –
1
2
3
4
5
6
7
8
9
OPERATION MANUAL (FOR MD-MT20H)
POWER SOURCE
■ Rechargeable battery power
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).
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 button of the main
unit to begin charging.
● “
” will appear, and the battery
will begin charging.
●After about 4 hours have passed,
“
” will go out.
This indicates that the battery charg-
ing is about 90% complete.
●
To charge the battery fully, continue
charging for about 2 more hours.
(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
on page 3 (ACCESSORIES).
● The charging time will vary, depending
on the condition of the battery.
● When the battery is charged for the first
time or is charged after not being used
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
in has been completely discharged.
1
2
4
3
5
AC 230-240V,
50/60 Hz
Insert securely,
all the way in.
To the DC IN 5V socket
RECORDING USING THE OPTICAL DIGITAL CABLE
This is the method used for recording digi-
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 Digital radios or DAT
tape recorders that use a different sam-
pling frequency (32 kHz or 48 kHz), re-
cordings can still be made. (The sam-
pling frequency of this unit is 44.1 kHz.)
● When making a digital recording from a
portable CD player (if the player has a
sound skip prevention function and this
function is turned on) the optical output
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-MT20H/16E
– 5 –
MD-MT20H/16E
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
■ Checking the remaining amount
of battery level
The remaining amount of battery level is
shown by the battery indicator (
) dur-
ing operation.
< How to read the battery indicator >
● 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
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
occur whilst recording or editing?
● Is the unit in the hold mode?
● Is an optical signal being output from the external
equipment?
Read the operation manual for the external equipment.
No sound is heard from
the earphones.
When the operation
buttons are pressed, the
unit does not respond.
Some sounds are
skipped.
The MiniDisc cannot be
ejected.
Recording and editing
are impossible.
■ If trouble occurs
When this product is subjected to strong
external interference (mechanical shock,
excessive static electricity, abnormal sup-
ply voltage due to lightning, etc.) or if it is
operated incorrectly, it may malfunction.
If such a problem occurs, do the following:
1. Unplug the AC adaptor from the AC
socket.
2. Remove the battery.
3. 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-MT20H/16E
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 run down.
● Nothing is recorded.
● No copy can be made because of
the SCMS copyright system.
● A track cannot be edited.
●
Recording cannot be performed cor-
rectly 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 OPEN lever was moved during
recording or editing.
● A disc has not been loaded.
● You tried to record on a playback-
only disc.
● Improper power is being supplied.
● The MD is write protected.
● The disc is damaged.
● Since a track number is currently
being located or written to, the unit
cannot accept your command.
● You have come to the conclusion
that the unit is out of order.
● The temperature is too high.
● A large portion of the disc has been
damaged.
● There is no space left for recording
character information (track names,
disc names, etc.).
● The track has been protected from
being erased.
● A large portion of the disc has been
damaged.
● There is an error in the recorded sig-
nal.
● 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 batteries (or use
the AC adaptor for power).
● Replace the disc with a recorded disc.
● Record using the analogue 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 re-
cordable disc.
● Connect the digital cable securely.
● Replace it with another recordable
disc.
● Return the HOLD switch to its origi-
nal position.
● Turn off the power and remove the
MiniDisc.
● Load a disc.
● Replace it with a recordable disc.
● Use one of the specified power
sources.
● Move the write protection knob back
to its original position.
● Reload the disc or replace it.
● Replace it with another recorded disc.
● Wait for a while and try the opera-
tion again.
● T o have it repaired, go to the distribu-
tor where you purchased the unit.
● Turn off the power, and wait for a
while.
● Replace it with another recorded
disc.
● Replace it with another recordable
disc.
● Edit the track with the device on
which it was recorded.
● Replace it with another recorded
disc.
● Erase all of the signal errors, and
then try recording again.
● A disc which contains non-music
data cannot be played.
● Replace it with another recorded
disc.
ERROR MESSAGES
Error messages
Remedy
BATT EMPTY
BLANK DISC
Can’t COPY
Can’t EDIT
Can’t REC
Can’t WRITE
DEFECT
Din UNLOCK
READ ERROR
DISC FULL
HOLD
LOCKED
LOCK ERROR
NO DISC
PB DISC
POWER ?
SORRY
SYSTEM ERR
TEMP OVER
TOC ERROR
TOC FULL
Tr. Protect
U TOC ERROR
? DISC
Meaning
PROTECTED
– 7 –
MD-MT20H/16E
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 8-1
2 Top Cabinet 1. Open the Top cabinet. 8-1
3 Key Switch/LCD 1. Flexible PWB......... (C1) x2 8-2
4 Mechanism Unit 1. Flexible PWB......... (D1) x2 8-2
5 Main PWB 1. Flat cable................ (E1) x1 8-2
6 Audio PWB
PROCEDURE
2. Screw ..................... (B1) x4
3. Screw ..................... (B2) x1
2. Raise the rear part, and remove 8-3
in the arrow direction.
2. Screw ..................... (E2) x2
1.
Screw ...................... (F1) x3 8-4
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 8-1
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 8-2
Mechanism Unit
Audio PWB
Figure 8-4
Figure 8-3
– 8 –
REMOVING AND REINSTALLING THE MAIN PARTS
(C1)x1
Stop Washer
MD Mechanism
Sled Motor
(C3)x2
ø1.4x1.2mm
(C2)x1
Drive Gear
(C4)x2
Mechanism Flexible
PWB Solder Joint
Remove the mechanism according to the disassembling methods 1 to 4. (See Page 8.)
How to remove the spindle motor (See Fig. 9-1.)
1. Remove the solder joint (A1) x 1 of flexible PWB.
2. Remove the screws (A2) x 3 pcs., and remove the spindle
motor.
How to remove the head up/down motor
(See Fig. 9-2.)
1. Remove the solder joints (B1) x 2 of head up/down motor
lead wire.
2. Remove the screw (B2) x 1 pc., and remove the flexible
PWB.
3. Remove the screw (B3) x 1 pc., and remove the head up/
down motor.
Note:
Take care so that the motor gear is not damaged.
(If the gear is damaged, noise is caused.)
(A2)x3
ø1.4x2.8mm
Spindle Motor
Remove the
solder joint
(B1)x2
Head Up/Down
Motor
MD-MT20H/16E
(A1)x1
Mechanism Flexible
PWB Solder joint
MD Mechanism
Figure 9-1
(B3)x1
ø1.4x5.5mm
(B2)x1
ø1.4x1.5mm
How to remove the sled motor (See Fig. 9-3.)
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. 9-4.)
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. 9-5.)
1. Remove the screw (E1) x 1 pc.
2. Slowly raise the optical pickup.
Figure 9-2
Figure 9-3
(D1)x2
ø1.4x2.2mm
MD Mechanism
(D2)x2
Spring Washer
Optical
Pickup Unit
Guide Shaft
(E1)x1
ø1.7x3mm
Thrust Plate Spring
Figure 9-5
MD Mechanism
– 9 –
Magnetic Head
(D1)x1
ø1.4x1.5mm
Figure 9-4
(D3)x2
Solder joint
(D1)x1
ø1.2x1.6mm
MD Mechanism
MD-MT20H/16E
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.
– 10 –
MD-MT20H/16E
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.
– 11 –
MD-MT20H/16E
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
– 12 –
MD-MT20H/16E
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
– 13 –
MD-MT20H/16E
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 _ D 2 H
S K t _ 7 0 H
S K m _ 7 8 H
W T m _ 2 4 H
M V 1 _ 4 F H
M V 2 _ A A H
S R V _ 0 A H
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 9 H
Control setting
Item display Set values
C T 0 _ 0 5 H
C T 1 _ 1 1 H
C T 2 _ 7 F H
C T 3 _ 3 0 H
R C 0 _ C 0 H
R C 1 _ F E H
S Y C _ A 6 H
P W L _ 0 3 H
D R 1 _ 9 2 H
D R 2 _ C 8 H
I N 1 _ D 3 H
I N 2 _ 6 4 H
I N 3 _ D 2 H
I N H _ 6 4 H
D R H _ C 8 H
P L E _ 1 B H
R C E _ 4 2 H
E L T _ 7 6 H
S L T _ 4 3 H
S P M _ 0 0 H
M S L _ 0 0 H
U S 0 _ 0 0 H
U S 1 _ 0 0 H
U S 2 _ 0 0 H
– 14 –
MD-MT20H/16E
: Test Mode STOP
: Pre-auto adjustment menu
: ATT auto adjustment menu
: Continuous record menu
: EEPROM setting menu
: INNER switch position measurement menu
BASS
T E S T
Slide external
periphery move
Slide internal
periphery move
Tset Mode Menu
Test Mode Change Chart
A U T O 1
A U T O 2
SKIP UP SKIP DOWN
SKIP DOWN
SKIP UP SKIP DOWN
SKIP UP SKIP DOWN
SKIP UP SKIP DOWN
SKIP UP SKIP DOWN
T R E C
SKIP UP SKIP DOWN
: Continuous playback menu
T P L A Y
SKIP UP SKIP DOWN
SKIP UP SKIP DOWN
SKIP UP SKIP DOWN
: Digital input signal monitor menu
D i n M o n
SKIP UP SKIP DOWN
E E P R O M
SKIP UP SKIP DOWN
I N N E R
SKIP UP
SKIP UP
SKIP DOWN
SKIP DOWN
SKIP UP
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [PLAY] button operation is performed in the specific menu, the operation of this
menu is executed.
: Pre-adjustment value check menu
R S L T 1
: ATT adjustment value check menu
R S L T 2
: Pre-manual adjustment menu
M A N U 1
: ATT manual adjustment menu
M A N U 2
: Error history display menu
E D A T A
: Test mode normal playback menu
N O R M A L
: Preautomatic Adjustment menu
: Preadjustment error (adjustment value output)
: During preadjustment adjustment
Adjustment error
Normal end
: Preadjustment normal end (adjustment value output)
: During ATT automatic adjustment
PLAY
PLAY
A U T O 1
Preautomatic Adjustment
A D J . O K
A D J . N G
A T 2
A T 1
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* " " represent the adjustment number as follows.
0 0 : Innermost periphery move
0 2 : ABEF offset tentative measurement
0 4 : RF side focus gain coarse adjustment
0 5 : Focus ATT tentative setting
0 6 : RF side bit section tracking gain adjustment
0 7 : COUT level setting for pit section adjustment
0 8 : External periphery move
0 9 : RF side groove section tracking gain adjustment
1 0 : COUT level setting for groove section adjustment
1 1 : RF side TCRS gain adjustment
1 2 : Tracking ATT initial setting
1 3 : RF side focus gain minor adjustment
1 4 : Focus ATT initial setting
1 5 : S gain "High" ABEF offset measurement
1 6 : TCRS offset measurement
1 7 : S gain "Low" ABEF offset measurement
– 15 –
MD-MT20H/16E
: ATT Autoadjustment menu
: ATT adjustment error (adjustment value output)
: During ATT autoadjustment
Adjustment error
Normal end
: ATT adjustment normal end (adjustment value output)
: Continuous playback (high reflection)
: Continuous playback (low reflection)
PLAY
PLAY
A U T O 2
ATT Auto Adjustment
A D J . O K
A D J . N G
S Q # # # #
A P # # # #
A T 2
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* " " represent the adjustment number as follows.
0 0 : Innermost periphery move
0 3 : Pit section tracking ATT setting
0 4 : Pit section focus ATT setting
0 6 : External periphery move (low reflection only)
0 7 : TCRS ATT setting (low reflection only)
0 8 : Groove section tracking ATT setting (low reflection only)
0 9 : Groove section focus ATT setting (low reflection only)
: Continuous playback menu
: Continuous playback (pit section)
: Continuous playback (groove section)
# # # # : Address
: Continuous playback (pit section)
: Continuous playback (groove section)
# # # # : Address
PLAY
T P L A Y
Continuous Playback
S Q # # # #
A P # # # #
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* In the start address set state the start address changes as follows when the [DISP] button is pressed.
0 0 3 2
H
(initial value) 0 3 C 0
H
0 7 0 0
H
0 8 A 0
H
A d 0 0 3 2
A d 0 3 C 0
DISP
DISP
A d 0 7 0 0
DISP
DISP
A d 0 8 A 0
* In the start address setting state the start address change digit changes when the [BASS] button is pressed.
1st digit (initial value) 2nd digit 3rd digit
A d 0 0 3 2
A d 0 0 3 2
MODE
MODE
A d 0 0 3 2
MODE
* In the continuous playback state the number of jump lines changes as follows shown
the [BASS] button is pressed.
1 (initial value) 10 384
1 T R
1 0 T R
BASS
BASS
3 8 4 T R
BASS
• Continuous playback from current pickup position
: Continuous playback menu
: Start address setting
DISP
T P L A Y
A d 0 0 3 2
PLAY
S Q # # # #
A P # # # #
• Continuous playback from any address
* In the start address set state the value of selection digit changes in the range of "0h to Fh"
when the [SKIP UP/DOWN] button is pressed
* When the [SKIP UP] button is pressed in the continued playback mode, jump of specified
number of lines occurs in the external periphery direction.
If the key is held down jump occurs continuously (100 ms cycle).
* When the [SKIP DOWN] button is pressed in the continuous playback mode, jump of
specified number of lines occurs in the internal periphery direction.
If the key is held down, jump occurs continuously (100 ms cycle).
A d 1 9 5 0 H
0 9 5 0
H
– 16 –
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