Sharp MD-SR60S Service Manual

MD-SR60

SERVICE MANUAL

No. S7059MDSR60S/

PORTABLE MINIDISC RECORDER

MODEL MD-SR60(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.

CONTENTS

Page

SPECIFICATIONS ................................................................................................................................................................. 2

NAMES OF PARTS ............................................................................................................................................................... 3

OPERATION MANUAL .......................................................................................................................................................... 4

QUICK GUIDE ........................................................................................................................................................................ 7

DISASSEMBLY...................................................................................................................................................................... 9

REMOVING AND REINSTALLING THE MAIN PARTS....................................................................................................... 10

ADJUSTMENT ...................................................................................................................................................................... 11

NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 24

TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 24

BLOCK DIAGRAM ............................................................................................................................................................... 25

SCHEMATIC DIAGRAM ...................................................................................................................................................... 26

WIRING SIDE OF P.W.BOARD........................................................................................................................................... 28

VOLTAGE ............................................................................................................................................................................ 31

WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 32

TROUBLESHOOTING ......................................................................................................................................................... 33

FUNCTION TABLE OF IC.................................................................................................................................................... 36

PARTS GUIDE/EXPLODED VIEW
PACKING OF THE SET

SHARP CORPORATION

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

MD-SR60

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

SPECIFICATIONS

General
Power source: DC 1.2V: Rechargeable Nickel-Metal Hydride

battery (AD-N70BT) x 1
DC 5V : AC adaptor (AC 120V, 60 Hz)
DC 1.5V: Commercially available,

"AA" size

(LR6), alkaline battery x 1
DC 4.5V: Separately available car adaptor,

AD-CA20X (for cars with a 12-24V

DC negative ground electrical

system)

Power consumption:

7W (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)

Battery life:

When using a
high capacity, "AA" size (LR6),
alkaline battery

commercially available,

Continuous recording

Approx. 3 hours
Continuous play

Approx. 7 hours

When using the rechargeable batter
(full charged) included with the unit

Continuous recording

Approx. 4.5 hours

Continuous play

Approx. 6.5 hours

The continuous recording time is for analog input when the
volume level is set to "VOL 0"
The continuous play time shows the value when the volume level
is set to "VOL 15"
The above values are the standard values when the unit is
charged and used at an ambient temperature of 68˚F (20˚C).

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

Input sensitivity:

Recording

level

Reference
input level

input

impedance

MIC H 0.25 mV 10 kohms

MIC L 2.5 mV 10 kohms

LINE 100 mV 20 kohms

Output level:

Specified

output

Maximum

output level

Load

impedance

Headphones — 10 mW + 10 mW 16 ohms
LINE 250 mV (-12 dB) — 10 kohms

Dimensions: Width: 3-15/16" (99.9 mm)

Height: 29/32"(22.9 mm)
Depth: 3-3/32" (77.9 mm)

Weight: 0.42 lbs.(191 g ) with rechargeable

battery

Input socket: Line/optical digital, microphone

(powered by the main unit)

Output socket: Headphones (impedance: 16 ohms)/

remote control unit

MiniDisc Recorder

Type: Portable MiniDisc recorder
Signal readout: Non-contact, 3-beam semiconductor

Audio channels: Stereo 2 channels/monaural (longplay
Frequency response: 20 - 20,000 Hz (± 3 dB)

Rotation speed: Approx. 400 - 900 rpm
Error correction: ACIRC (Advanced Cross Interleave

Coding: ATRAC (Adaptive Transform

Recording method: Magnetic modulation overwrite
Sampling frequency: 44.1kHz (32 kHz and 48kHz signals

Wow and flutter: Unmeasurable

Specifications for this model are subject to change without prior
notice

laser pick-up
mode) 1 channel

Reed-Solomon Code)
Acoustic Coding), 24-bit computed

type
method
are converted to 44.1kHz, and then

recorded)

(less than ±0.001% W. peek)

– 2 –

NAMES OF PARTS

9

31
32
33
34
35

29
30

20
21
22

23
24
25

26

27 28

36 37 38 39 40

41

42

43 44

MD-SR60

1. Volume Up/Cursor Button

2. Volume Down/Cursor Button

3. Edit/Auto Mark/Time Mark Button

4. Display/Character Select Button

5. Remote Control/Headphones/Line Output
Jack

6. Optical/Line Input Jack

7. Microphone Input Jack

8. Record/Track Mark Button

9. Stop/Power Off/Charge Button

10. Play/Pause Button

11. Enter/Fast Play/Synchro Button

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

13. Fast Rever se/Recording Level Down/
Name Select Button

14. Bass/Delete Button

15. Mode Button

16. Open Lever

17. 5V DC Input Jack

18. Battery Cover

19. Hold Switch

20. Level Meter

21. Monaural Long-Play Mode Indicator

22. Record Indicator

23. Synchro Recording Indicator

24. Disc Mode Indicator

25. Disc Name Indicator

26. Track Name Indicator

27. Remaining Recording Time Indicator

28. Total Track Number Indicator

29. Fast Play Indicator

30. Repeat Indicator

31. TOC Indicator

32. Battery Indicator

33. Random Indicator

34. Track Number Indicator

35. Character/Time Information Indicator

1
2
3

4

5
6
7

17

8
9

10

11

12
13

14
15
16

1

18

36. Headphones Jack

37. Bass/Delete/Track Mark Button

38. Volume Down/Cursor Button

39. Volume Up/Cursor Button

40. Hold Switch

41. Play/Pause Button

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

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

44. Stop/Power Off Button

– 3 –

MD-SR60

Battery P ower

12

5

To an AC
outlet

3

OPERATION MANUAL

Charging the rechargeable battery

4

1

2

6

When the rechargeable battery is used for the first
time or when you use it after a long period of dis­use, be sure to charge it fully.

1

Slide the battery cover as far as it will go
to the outside.

2

Lift the battery cover.

Do not force the battery cover open too far.

3

Insert the rechargeable battery from the
(+) marked side.

Only the rechargeable battery that is supplied
and the battery that is available separately
(Part number AD-N70BT) can be charged.

AC 120V,
60 Hz

5

To the DC
IN 5V jack

4

Close the battery cover.

5

Plug the AC adaptor into the A C outlet, and
then insert the plug on the other end into
the DC IN 5V jack.

6

Press the :OFF/CHRG (• ) button.

” will flash, and battery will begin charging.

“

Checking the remaining amount of
battery level

The remaining amount of battery level is shown
by the battery indicator (

How to read the battery indicator

When the battery
level is high

When the battery is completely discharged, the battery
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 discon­nected automatically.

Notes:

If you use the battery which you stopped charging half­way, “
tery is completely charged.

The battery indicator will not correctly display the remain­ing capacity for approximately 10 seconds after the po wer
has been turned on.

When the AC adaptor or a separately av ailable 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.

” may appear. It does not mean that the bat-

) during operation.

When the battery
level is very low

– 4 –

MiniDisc System Limitations

Troubleshooting

Many potential “problems” can be resolved by the owner without calling a service technician.
If something seems to be wrong with this product, check the following before calling your authorized SHARP dealer or
service center.

The unit does not turn on.

No sound is heard from the head­phones.

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.

PROBLEM CAUSE

●

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 headphones 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 headphones plug inserted 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 while recording or editing?

●

Is the unit in the hold mode?

●

Is an optical signal being output from the stereo system?
Read the operation manual for the stereo system.

The unit may have the following symptoms while recording or editing. The unit is not malfunctioning.

MD-SR60

SYMPTOM

“DISC FULL” or “TOC FULL” appears
even though the MiniDisc still has re­cording time left.

The remaining recording time does not
increase even though you erased tracks.

The total of the recorded time and the
remaining time does not match the maxi­mum recordable time.

Combine function does not work.

Sound skips in fast reverse/forward.

A track number is created in the middle
of a track.

LIMITATIONS

More than 255 tracks (maximum) cannot be recorded regardless of the re­cording time.
If the MiniDisc is recorded or edited repeatedly or if it has scratches (record­ing skips scratched parts), you may not be able to record the maximum
tracks above.

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.

One cluster (approximately 2 seconds) is the minimum unit for recording.
For example, a 3-second track uses 2 clusters (approximately 4 seconds).
Therefore, the actual recordable time may be shorter than the displayed
time.

A MiniDisc on which recording and editing are repeated may not allow the
combine function.

One track is divided and recorded in separate places on a repeatedly re­corded or edited MiniDisc.
Sound may skip.

A track number may be created if there are scratches or dust on the MiniDisc.

– 5 –

MD-SR60

g

Error Messages

ERROR MESSAGES

BATT EMPTY
BLANK MD
Can’t COPY
Can’t EDIT

● The battery is not charged or there

● Nothing is recorded.

● You tried to record from a copy pro-

● A track cannot be edited.

● The disc data cannot be read be-

is no battery in the compartment.

hibited MiniDisc.

MEANING

cause the disc is damaged.

Can’t READ (*)

Can’t REC
Can’t STAMP

Can’t WRITE

● Recording cannot be performed cor-

rectly due to vibration or shock.

● Stamp function does not work.

● Cannot save the TOC information

correctly to a MiniDisc. (A large por­tion of the disc has been damaged.)

DEFECT
DISC FULL

Er-MD (**)

● The disc is scratched.

● The disc is out of recording space.

● The microprocessor has reported a

system fault and the unit is out of or­der.

HOLD
LOCKED

NO DISC

● The unit is in the hold mode.

● You removed a MiniDisc while re-

cording or editing.

● A disc has not been loaded.

Number or symbol appears in (*) position.

REMEDY

● Charge the rechargeable battery or replace the alka-

line battery (or use the AC adaptor for power).

● Replace the disc with a recorded disc.

● Record using the analog cable.

● Change the stop position of the track and then edit it.

● Reload the disc.

● Replace it with another recorded disc.

*:f=focus ERROR r=TOC READ
a=SERVO ADJUST u=UTOC READ
s=TRACK SEARCH w=Data WRITE

● Re-record or replace it with another recordable disc.

● Check the number of tracks.

● Replace the disc with another recordable disc.

● If the sound you hear is not right, record again.

● Replace the disc with another recordable disc.

● Replace it with another recordable disc.

● To have it repaired, go to the distributor where you

purchased the unit.
**:80=EEPROM READ ERROR
41=UTOC WRITE ERROR

● Return the HOLD switch to its original position.

● Turn off the power and remove the MiniDisc.

● Load a disc.

ERROR MESSAGES

NO SIGNAL

PLAY MD

POWER ?

PROTECTED

●

Poor connection of the digital cable.

●

No output signal comes out from the
connected unit to playback.

●

You recorded on a playback-only
disc.

●

Improper power is being supplied.

●

The write protection tab of a MiniDisc
is set to the protected position.

●

You tried to record on a playback-

MEANING

only disc.

●

SORRY

Since a track number is currently
being located or written to, the unit
cannot accept your command.

●

TEMP OVER
TOC FORM

TOC FULL

Tr. Protect

? DISC

(**)

The temperature is too high.

●

There is an error in the recording
signal.

●

There is no space left for recording
character information (track names,
disc names, etc.).

●

The track has been protected from
being erased.

●

A disc which contains data other than
music was played.

●

There is an error in the signal re­corded on the disc.

Number or symbol appears in (*) position.

REMEDY

●

Connect the digital cable securely.

●

If the portable CD player has a function to prevent sound
skips, deactivate it.

●

Playback with the connected unit.

●

Replace it with a recordable disc.

●

Use one of the specified power sources.

●

Move the write protection tab back to its original position.

●

Replace it with a recordable MiniDisc.

●

Wait for a while and try the operation again.

●

Turn off the power, and wait for a while.

●

Erase all of the tracks, and then record again.

●

Replace it with another recordable disc.

●

Edit the track with the device on which it was recorded.

●

A disc which contains non-music data cannot be
played.

●

Replace it with another recorded disc.

– 6 –

QUICK GUIDE

OPTICAL/

LINE IN

AUDIO OUT

RIGHT LEFT

3

Connection /

Conexión

To a stereo system with “AUDIO OUT” or “LINE OUT”
jacks. (See left. Analog connection)

Note:

●

If the audio system has only one pair of jack then they are usu­ally input only and recording via this connection is not possible.

A un sistema estéreo provisto de tomas de salida de
audio "AUDIO OUT" o de salida de línea "LINE OUT".
(Vea a la izquierda, Conexión analógica)

Nota:

●

Si el sistema de audio sólo tiene un par de tomas, normalmente
son sólo de entrada y no puede realizarse la grabación
mediante esta conexión.

1

Insert a MiniDisc

Inserte un minidisco

MD-SR60

Quick Guide / Guía rápida

PORTABLE MINIDISC RECORDER

MODEL

/MODELO

MD-SR60

Quick Setup Guide

Guía rápida de configuración

Follow the setup procedure (1-3) before you use
this unit.

Siga los procedimientos de configuración (1-3) an­tes de utilizar el aparato.

Quick Operation Guide

Guía rápida de operación

Explains basic recording and playback procedures.

Explica los procedimientos básicos de grabación y
reproducción.

Refer to the operation manual for details.

Para más detalles, consulte el manual de manejo.

4

2

33

1

1

Slide the OPEN lever to re­lease the compartment door.

Deslice la palanca OPEN para
abrir la puerta del comparti­miento.

2

Lift up the compartment.

Levante el compartimiento.

Recordable

Para poder
grabar

Recording
prevented

Para no poder
grabar

Insert according to the direction arrow.

Insértelo de acuerdo con la dirección de la flecha.

3

Insert a MiniDisc as shown.

Inserte un minidisco como se
muestra.

4

Close the compartment door.

Cierre la puerta del comparti­miento.

When you record on a MiniDisc,
check that the erase prevention tab
is set to the “recordable” position.

Cuando desee grabar en un
minidisco, compruebe que la
lengüeta de protección contra
borrado esté colocada en la posición
para "poder grabar".

2

Connect the AC adaptor

Conecte el adaptador de CA

To the DC IN
5V jack.

A la toma DC
IN 5V

1

Plug the AC adaptor into the

AC outlet.

Enchufe el adaptador de CA
en el tomacorriente de CA.

Before using the unit with a rechargeable battery, the battery has to be charged.

Antes de emplear el aparato con una batería, deberá cargarse la batería.

2

Insert securely, all the way in.

Insértelo con seguridad a fondo.

2

Insert the plug on the other
end into the DC IN 5V jack.

Inserte la clavija del otro
extremo en la toma DC IN 5V .

AC 120V, 60 Hz

120V CA, 60Hz

1

To an AC
outlet

A un
tomacorriente
de CA

– 7 –

MD-SR60

Recording / Grabación

Check that the unit is connected to the stereo system.

Compruebe que el aparato esté conectado al sistema estéreo.

1

3

5

2

Playback/

Reproducción

4

Pause/

Pausa

6

Playback/

Reproducción

1

Press the REC button.

Pulse el botón REC.

2

Begin playback on the stereo system connected to this unit.

Inicie la reproducción en el sistema estéreo conectado a este aparato.

5

Playing /

Reproducción

1 Insert the headphones plug firmly into the headphones jack on the remote

control.

Inserte firmemente la clavija de los auriculares en la toma de auriculares del
controlador remoto.

2 Plug the remote control into the jack on the unit.

Enchufe el controlador remoto en el enchufe del aparato principal.

3 Insert a MiniDisc.

Inserte un minidisco.

4 Press the button.

Playback starts automatically with a playback only MiniDisc or a MiniDisc which is pro-

tected against accidental erasure (Auto-play function).

Pulse el botón

La reproducción se inicia automáticamente con un minidisco de sólo reproducción o un
minidisco protegido contra borrado accidental.

(Función de reproducción automática)

To stop playback

Press the • /:OFF button.

If the unit is not operated for at least 2 minutes
while in the stop mode, the power will shut off
automatically.

To the

jack

2

1

4

Para detener la reproducción

Pulse el botón • /:OFF.

Si el aparato no se utiliza durante un mínimo de 2
minutos estando en el modo de parada, la
alimentación se desconectará automáticamente

.

6

Preparation for use

4

Preparación para su utilización

Release the HOLD switch on the bottom of the unit before use. The unit does not
work if the switch is set to HOLD.

Para poder utilizarlo, suelte el interruptor HOLD de la parte inferior del aparato.
El aparato no funciona si el interruptor está colocado en HOLD.

Hold

Retenido

CAUTION:

It is not recommended to put the
MiniDisc into a rear pocket, as this
may damage the product when sitting.

PRECAUCIÓN:

No se recomienda ponerse un
minidisco en el bolsillo trasero del
pantalón, porque podría dañarlo al
sentarse.

Released

Liberado

Recording: continued

3 Press the REC LEVEL ( or ) button to adjust the recording level (only ana-

log connection).

Adjust the recording level so that the maximum sound volume from the source
makes the reading swing somewhere between –4 dB and 0 dB.

Pulse el botón REC LEVEL ( o ) para ajustar el nivel de grabación (sólo con
conexión analógica).

Ajuste el nivel de grabación para que el volumen de sonido máximo de la fuente
produzca una indicación de entre –4 dB y 0 dB.

4

Press the PA USE b utton on the stereo system to enter the pla ybac k pause mode.

Here you can search for the track to record.

Pulse el botón P AUSE del sistema estéreo para establecer el modo de pausa de
reproducción.

Ahora podrá buscar la pista que desee grabar.

5 Press the 06 button.

Pulse el botón 06

6 Begin playback on the stereo system to start recording.

Inicie la reproducción en el sistema estéreo para comenzar la grabación.

To stop recording

Press the • /:OFF button.

When recording stops, “TOC” appears . While
“TOC” appears, recorded contents haven’t
been written on the MiniDisc.

Para detener la grabación:

Pulse el botón • /:OFF.

Cuando se pare la grabación, aparecerá
"TOC". Mientras aparezca "TOC", el
contenido grabado no se habrá escrito
todavía en el minidisco.

Level meter indicator

Indicador del medidor de nivel

TOC display

Visualización TOC

0dB
4dB

To write recorded contents on the
MiniDisc

Press the • /:OFF

The power turns off after recorded contents
have been written on the MiniDisc.

Para escribir el contenido grabado en
el minidisco

Pulse el botón
de parada.

• /:OFF

La alimentación se desconecta después de
haberse escrito el contenido grabado en el
minidisco.

button while in the stop mode.

estando en el modo

– 8 –

DISASSEMBLY

(B1)x2
ø1.4x2mm

(B1)x2
ø1.4x2mm

(A1)x1
ø1.4x2mm

(A1)x2
ø1.4x2mm

(A1)x2
ø1.4x2mm

Open Lever

Bottom Cabinet

Top Cabinet

(A1)x1
ø1.4x2mm

Battery Cover

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 position the
wires in the same location.
Use the specified screws to fix the cabinet and the
mechanism unit. The use of the screws with length other
than specified may cause contact with the mechanism
unit resulting in malfunction.

3. When repairing, pay close attention so not to damage the
IC from static electricity.

MD-SR60

STEP

REMOVAL

1 Bottom Cabinet 1. Screw .....................(A1) x6 9-1

2 Top Cabinet 1. Open the Top cabinet.

3 Main PWB 1. Screw .................... (C1) x4 9-2

4 Mechanism Unit 1. Raise the rear part, and 9-3

PROCEDURE

2. Open the Battery Cover.

3. Screw ..................... (B1) x4

4. Flexible PWB.......... (B2) x2 9-2

2. Flexible PWB......... (C2) x2

3. Solder joint .............(C3) x2

remove in the arrow direction.

Mechanism Unit

FIGURE

9-1

(C3)x1

pull

(C2)x1*

Felt

Figure 9-1

(C1)x4
ø1.7x2.5mm

(C3)x1

(B2)x2

pull

(C2)x1

pull

pull

pull

pull

Main PWB

Mechanism Unit

Fold back the flexible PWBs to put on the
connector, and fix them with felt. Loosening
of the flexible PWBs may cause contact with
the sheet metal, resulting in disconnection or
short circuit.

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 9-2Figure 9-3

– 9 –

MD-SR60

REMOVING AND REINSTALLING THE MAIN PARTS

Remove the mechanism according to the disassembling meth­ods 1 to 4. (See Page 9.)

(A2)x3
ø1.4x2.8mm

How to remove the spindle motor (See Fig. 10-1.)

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 Lift motor (See Fig. 10-2.)

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

lead wire.

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

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

Note:

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

How to remove the sled motor (See Fig. 10-3.)

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. 10-4.)

1. Remove the screws (D1) x 4 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.

(B3)x1
ø1.4x5.5mm

Remove the
Solder joint
(B1)x2

Lift Motor

Stop Washer

Driver Gear

Spindle
Motor

(C1)x1

(C2)x1

Mechanism Flexible
PWB Solder joint
(A1)x1

MD Mechanism

Figure 10-1

(B2)x1
ø1.4x1.5mm

MD Mechanism

Figure 10-2

(C3)x2
ø1.4x1.2mm

Sled Motor

Mechanism Flexible
PWB Solder joint
(C4)x2

How to reinstall the optical pickup unit
(See Fig. 10-5.)

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

2. Slowly raise the optical pickup.

(E1)x1
ø1.7x3mm

Guide Shaft

Optical Pickup Unit

Figure 10-5

Thrust Plate Spring

MD Mechanism

– 10 –

Figure 10-3

Magnetic Head

Figure 10-4

MD Mechanism

(D1)x1
ø1.4x1.5mm

(D1)x1
ø1.2x1.6mm

MD Mechanism

(D1)x2
ø1.4x2.2mm

(D2)x2
Spring joint

Solder joint

(D3)x2

MD-SR60

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 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 [ Y 1 9 A b X ]

Destination

Microcomputer version

(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).

EEPROM version

Leaving the TEST mode

(1) Press the STOP button in the TEST mode stop 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. are indicated.

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

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

• Cutoff 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.

– 11 –

MD-SR60

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

* Recordable 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.

– 12 –

MD-SR60

5. NORMAL Mode

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

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

: Internal mode
: Address (Cluster section)
: Address (Sector section)

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

• Recording is also possible.

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

6. Error data display Mode

• Reversing when SKIP DOWN button is pressed

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

• Error data 0 is the latest error.

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

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

• : Error Code

Explanation of error history code

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

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

ture.

7. INNER Mode

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

• : Address

– 13 –

MD-SR60

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) Version display

[ V e r . ]

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

[ T E S T ]

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

[ E E P R O M ]

(8) 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.

(9) Set the temperature reference. (Refer to the Temperature 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.

X

EEPROM version (b ~ 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

– 14 –

EEPROM DATA LIST (EEPROM version b)

TEMP setting

Item display Set values

T M _ _ Calculate values

Focus 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 _ 2 0 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 _ 6 0 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

MD-SR60

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 _ A B H
S K k _ 7 2 H
S K t _ 4 C H
S K m _ 7 0 H
W T m _ 2 4 H
M V 1 _ 4 4 H
M V 2 _ 8 8 H
S R V _ 0 0 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 _ 6 4 H

EQ. SET setting

Item display Set values

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

Control setting

Item display Set values

C T 0 _ 0 1 H
C T 1 _ 1 1 H
C T 2 _ 4 0 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 1 H
D R 1 _ 0 0 H
D R 2 _ 0 0 H
I N 1 _ C 9 H
I N 2 _ 6 4 H
I N 3 _ 9 9 H

I N H _ 6 4 H
D R H _ 0 C H
P L E _ 1 B H
R C E _ 4 2 H
E L T _ 7 6 H
S L T _ 4 5 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

– 15 –