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Model Name Using Similar Mechanism

MDS-JE640

MD Mechanism Type

MDM-7A

Optical Pick-up Type

KMS-260B/J1N

US Model

Canadian Model

AEP Model

UK Model

E Model

US and foreign patents licensed form Dolby Laboratories
Licensing Corporation.

Photo: SILVER

System

MiniDisc digital audio system

Disc

MiniDisc

Laser

Semiconductor laser (

λ = 780 nm)

Emission duration:  continuous

Laser output

Less than 44.6 

µW*

* This output is the value

measured at a distance of
200 mm from the objective lens
surface on the Optical Pick-up
Block with 7 mm aperture.

Laser diode

Material: GaAlAs

Revolutions (CLV)

400 rpm to 900 rpm

Error correction

Advanced Cross Interleave Reed
Solomon Code (ACIRC)

Sampling frequency

44.1 kHz

Coding

Adaptive Transform Acoustic
Coding (ATRAC)

Modulation system

EFM (Eight-to-Fourteen
Modulation)

Number of channels

2 stereo channels

Frequency response

5 to 20,000 Hz 

±0.5 dB

Signal-to-noise ratio

Over 94 dB during playback

Wow and flutter

Below measurable limit

Inputs

LINE (ANALOG) IN

Jack type:  stereo-mini
Impedance:  47 kilohms
Rated input:  500 mVrms
Minimum input:  125 mVrms

DIGITAL  (OPTICAL) IN Connector type:  square optical

Impedance:  660 nm (optical wave
length)

Outputs

LINE (ANALOG) OUT (VARIABLE)

Jack type:  stereo-mini
Rated output:  1 Vrms (at
50 kilohms)
Load impedance:  Over 10 kilohms

DIGITAL (OPTICAL) OUT

Connector type:  square optical
Rated output:  –18 dBm
Impedance:  660 nm (optical wave
length)

PHONES

Jack type:  stereo-mini
Rated output:  5 mW
Load impedance:  32 ohms

General

*

U.S.A. and Canada

120 V AC, 60 Hz

Other countries

220 – 230 V AC, 50/60 Hz

* Using an AC power adaptor (supplied)

Power consumption

7 W

Dimensions (approx.)

152 

× 52 × 255 mm (6 × 2 

1

/

8

 

×

10 

1

/

8

 inches) (w/h/d) incl.

projecting parts and controls

Mass (approx.)

1.0 kg (2 lb 4 oz)

Supplied accessories

• AC power adaptor (1)

• Audio connecting cord

(stereo mini-plug 

× 1 y stereo mini-plug × 1)

(1)

• Optical cable (1)

• Remote commander (remote) RM-D52M (1)

• PC connecting kit PCLK-MN10* (1)

* Required for operation by personal computer.  For

details, refer to the operating instructions supplied
with the PCLK-MN10.

2006L02-1
© 2006.12

2

The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes which
show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box
in the instruction manual. For details on how to check error codes during servicing, refer to the following “Procedure for using the Self-
Diagnosis Function (Error History Display Mode)”.

Perform the self-diagnosis function in the “error history display mode” in the test mode. The following describes the least required
procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the  x/Z  button to exit the
mode.

Self-Diagnosis Function

The deck’s self-diagnosis function automatically checks the condition of the MD deck when an error
occurs, then issues a three-digit code and an error message on the display.  If the code and message
alternate, find them in the following table and perform the indicated countermeasure.  Should the problem
persist, consult your nearest Sony dealer.

C11/Protected

The inserted MD is record-protected.
, Take out the MD and close the record-protect slot (page 13).

C12/Cannot Copy

An attempt was made to play a disc that is not compatible with this deck
(MD data disc, etc.).
, Replace the disc.

C13/Rec Error

The recording was not made properly.
, Set the deck in a stable surface, and repeat the recording procedure.

The inserted MD is dirty (with smudges, fingerprints, etc.), scratched, or
substandard in quality.
, Replace the disc and repeat the recording procedure.

C13/Read Error

The deck could not read the TOC on the MD properly.
, Take out the MD and insert it again.

C14/Toc Error

The deck could not read the TOC on the MD properly.
, Insert another disc.
, If possible, erase all the tracks on the MD (page 29).

C41/Cannot Copy

The digitally dubbed material cannot be recorded digitally (page 11).

C71/Din Unlock

The sporadic appearance of this message is caused by the digital signal being
recorded.  This will not affect the recording.

While recording from a digital component connected through the DIGITAL
(OPTICAL) IN connector, the digital connecting cable was unplugged or the
digital component turned off.
, Connect the cable or turn the digital component back on.

E0001/MEMORY NG

There is an error in the internal data that the deck needs in order to operate.
, Consult your nearest Sony dealer.

E0101/LASER NG

There is a problem with the optical pickup.

, Consult your nearest Sony dealer.

*Note:
As this unit has only a few buttons, one button is assigned with several functions in the test mode.”
Press the  z  button,  AMS  knob to switch the functions.

• Each time the  z  button is pressed, the display switches in the follwing order, “PGM”  t  “blank”  t  “PGM”  t –.
• Rotate the  AMS  knob and the display switches in the following order, “blank”  t  “TOC”  t  “EDIT”  t “TOC EDIT” t

“[         ]”  t  “[TOC      ]”  t  “[     EDIT]”  t  “[TOC EDIT]”  t  “blank”  t – –.

For simplicity, operations of  z  button will not be discribed here.

Example)  x/Z  : Lights-out “PGM” and press the  x/Z  button.

 x/Z “PGM”  : Display “PGM” and press the  x/Z  button.

The functions of each button change with the display.

Nothing

TOC

EDIT

TOC EDIT

TOC

EDIT

TOC EDIT

displayed

@/1

@/1

ENTER

REPEAT

PLAY

CLEAR

FF

PLAY

DISPLAY

—

(YES)

MODE

MENU

x/Z

EJECT

(EDIT)/

STOP

REC

—

FR

SCROLL

TIME

—

NO

3

1. While pressing the  AMS  knob and  x/Z  button, connect the power plug to the outlet, and release the  AMS  knob and  x/Z  button.

When the test mode is set, “[Check]” will be displayed.

2. Rotate the  AMS  knob and when “[Service]” is displayed, press the  @/1  button.
3. Rotate the  AMS  knob and display “Err Display”.
4. Pressing the  @/1  button sets the error history mode and displays “op rec tm”.
5. Select the contents to be displayed or executed using the  AMS  knob.
6. Pressing the  AMS  knob will display or execute the contents selected.
7. Pressing the  AMS  knob another time returns to step 4.
8. Pressing the  x/Z  button displays “Err Display” and exits the error history mode.
9. To exit the test mode, remove the power plug to the outlet.

Display

op rec tm

op play tm

spdl rp tm

retry err

total err

err history

retry adrs

er refresh

tm refresh

op change

spdl change

History

Displays the total recording time.
When the total recording time is more than 1 minute, displays the hour and minute
When less than 1 minute, displays “Under 1 min”
The display time is the time the laser is set to high power, which is about 1/4 of the actual recording time.

Displays the total playback time.
When the total playback time is more than 1 minute, displays the hour and minute
When less than 1 minute, displays “Under 1 min”

Displays the total rotating time of the spindle motor.
When the total rotating time is more than 1 minute, displays the hour and minute
When less than 1 minute, displays “Under 1 min”

Displays the total number of retry errors during recording and playback
Displays “r xx p yy”. xx is the number of errors during recording. yy is the number of errors during playback.
This is displayed in hexadecimal from 00 to FF.

Displays the total number of errors
Displays “total xx”. This is displayed in hexadecimal from 00 to FF.

Displays the past ten errors.
Displays “0x ErrCd@@”.
X is the history number. The younger the number, the more recent is the history (00 is the latest). @@ is the error code.
Select the error history number using the  AMS  knob.

Displays the past five retry addresses.
Displays “xx ADRS yyyy”, xx is the history number, yyyy is the cluster with the retry error.
Select the error history number using the  AMS  knob.

Mode for erasing the error and retry address histories
Procedure
1. Press the  AMS  knob when displayed as “er refresh”.
2. Press the  @/1  button when the display changes to “er refresh?”.
When “complete!” is displayed, it means erasure has completed.
Be sure to check the following after executing this mode.
*Data has been erased.
*Perform recording and playback, and check that the mechanism is normal.

Mode for erasing the total time of recording and playback
Procedure
1. Press the  AMS  knob when displayed as “tm refresh”.
2. Press the  @/1  button when the display changes to “tm refresh?”.
When “complete!” is displayed, it means erasure has completed.

Mode for erasing the total time of op rec tm, op play tm.
These histories are based on the time of replacement of the optical pickup. If the optical pick-up has been replaced, perform this
procedure and erase the history.
Procedure
1. Press the  AMS  knob when displayed as “op change”.
2. Press the  @/1  button when the display changes to “op change?”.
When “Complete!” is displayed, it means erasure has completed.

Mode for erasing the total spdl rp tm time
These histories are based on the time of replacement of the spindle motor. If the spindle motor has been replaced, perform this
procedure and erase the history.
Procedure
1. Press the  AMS  knob when displayed as “spdl change”
2. Press the  @/1  button when the display changes to “spdl change?”
When “Complete!” is displayed, it means erasure has completed.

4

Description

5

........................................................................ 11

3-1. Case (U) .............................................................................. 14
3-2. MD Mechanism Deck (MDM-74) ...................................... 14
3-3. Main Board ......................................................................... 15
3-4. Over Light Head (HR901), BD (MD) Board ...................... 15
3-5. Holder Assy ......................................................................... 16
3-6. Loading Motor Assy (M103) .............................................. 16
3-7. Sled Motor Assy (M102), Slider ......................................... 17
3-8. Optical Pick-up (MD) (KMS-260B/JIN) ............................ 17
3-9. Spindle Motor Assy (M101) ............................................... 18

..................................................................... 19

............................... 24

6-1. Block Diagrams

• BD Section ....................................................................... 36
• Main Section .................................................................... 37

6-2. Printed Wiring Board – BD Section – ................................. 38
6-3. Schematic Diagram – BD Section (1/2) – ........................... 39
6-4. Schematic Diagram – BD Section (2/2) – ........................... 40
6-5. Printed Wiring Board – Main Section – .............................. 41
6-6. Schematic Diagram – Main Section (1/2) – ........................ 42
6-7. Schematic Diagram – Main Section (2/2) – ........................ 43
6-8.

Printed Wiring Board – Panel Section – ........................... 44

6-9.  Schematic Diagram – Panel Section – ............................... 45
6-10. IC Block Diagrams ........................................................... 46
6-11. IC Pin Functions ............................................................... 49

7-1. Chassis Section ................................................................... 54
7-2. Mechanism Section-1 (MDM-7A) ...................................... 55
7-3. Mechanism Section-2 (MDM-7A) ...................................... 56

........................................ 57

Error Code

10

12

20

21

22

23

24

30

31

40

41

42

43

50

51

Could not load

Loading switches combined incorrectly

Timed out without reading the top of PTOC

Could read top of PTOC, but detected error

Timed out without accessing UTOC

Timed out without reading UTOC

Error in UTOC

Could not start playback

Error in sector

Retry cause generated during normal recording

Retried in DRAM overflow

Retry occurred during TOC writing

Retry aborted during S.F editing

Other than access processing, and could not read address.

Focus NG occurred and overran.