SONY MDSPC3 - Service Manual Immediate Download

MDS-PC3

SPECIFICATIONS

SERVICE MANUAL

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 (

= 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

Where purchased

Power requirements*

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.

Ver. 1.1 2005.03

Sony Corporation

Audio Group

Published by Sony Engineering Corporation

9-929-545-12

2005C02-1

MINIDISC DECK

SELF-DIAGNOSIS FUNCTION

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)".

Procedure for using the Self-Diagnosis Function (Error History Display Mode).

Note: 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.

Three-digit code/Message

Cause/Remedy

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.

Bottons and Corresponding Functions

"PGM" Lights-out

LCD displayed

Buttons

"PGM"

displayed

Nothing

TOC

EDIT

TOC EDIT

TOC

EDIT

TOC EDIT

displayed

@/1

ENTER

REPEAT

PLAY

CLEAR

PLAY

DISPLAY

(YES)

MODE

x/Z

EJECT

(EDIT)/

STOP

REC

SCROLL

TIME

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.

ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS

Selecting the Test Mode

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.

Description

TABLE OF CONTENTS

1. SERVICING NOTES ............................................. 5

2. GENERAL ........................................................................ 11

3. DISASSEMBLY

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

4. TEST MODE ..................................................................... 19

5. ELECTRICAL ADJUSTMENTS ............................... 24

6. DIAGRAMS

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. EXPLODED VIEWS

7-1. Chassis Section ................................................................... 54

7-2. Mechanism Section-1 (MDM-7A) ...................................... 55

7-3. Mechanism Section-2 (MDM-7A) ...................................... 56

8. ELECTRICAL PARTS LIST ........................................ 57

Table of Error Codes

Error Code

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.

SECTION 1

SERVICE NOTES

This appliance is classified as a

CLASS 1 LASER product. The

CLASS 1 LASER PRODUCT

MARKING is located on the

rear exterior.

Laser component in this product is capable

of emitting radiation exceeding the limit for

Class 1.

CAUTION

Use of controls or adjustments or performance of procedures

other than those specified herein may result in hazardous radia-

tion exposure.

Notes on chip component replacement

· Never reuse a disconnected chip component.

· Notice that the minus side of a tantalum capacitor may be

damaged by heat.

Flexible Circuit Board Repairing

· Keep the temperature of soldering iron around 270°C

during repairing.

· Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

· Be careful not to apply force on the conductor when soldering

or unsoldering.

NOTES ON HANDLING THE OPTICAL PICK-UP

BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic

break-down because of the potential difference generated by the

charged electrostatic load, etc. on clothing and the human body.

During repair, pay attention to electrostatic break-down and also

use the procedure in the printed matter which is included in the

repair parts.

The flexible board is easily damaged and should be handled with

care.

NOTES ON LASER DIODE EMISSION CHECK

Never look into the laser diode emission from right above when

checking it for adjustment. It is feared that you will lose your sight.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH

MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS

LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE

COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS

APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS

PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES

DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT

CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE

REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY

DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU

DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

This caution

label is located

inside the unit.

Lead free soldering

MAIN and PANEL boards of this product are lead free soldered

(contains no lead).

Lead-free solder have the following characteristics.

· The melting point is about 40 ºC higher than conventional solder.

Conventional soldering iron can be used, but must be pressed for

a longer time.

When using the soldering iron with a temperature adjustment func-

tion, set to about 350 ºC.

Note: Pressing the soldering iron too long may cause the board pat-

tern (copper coating) to peel off.

· Strong viscosity

As it has stronger viscosity than conventional solder, make sure

the IC terminal does not solder bridge.

· Can be used with conventional solder

Though it is best to add lead-free solder only, conventional solder

can also be added.

· Boards using lead-free solder are printed with the LF mark mean-

ing "Lead Free".

Fig. A.

Using an AC voltmeter to check AC leakage.

1.5 k

0.15

µF

voltmeter

(0.75 V)

To Exposed Metal

Parts on Set

Earth Ground

SAFETY CHECK-OUT

After correcting the original service problem, perform the follow-

ing safety check before releasing the set to the customer:

Check the antenna terminals, metal trim, "metallized" knobs, screws,

and all other exposed metal parts for AC leakage.

Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground and

from all exposed metal parts to any exposed metal part having a

return to chassis, must not exceed 0.5 mA (500 microamperes). Leak-

age current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA

WT-540A. Follow the manufacturers' instructions to use these

instruments.

2. A battery-operated AC milliammeter. The Data Precision 245

digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a VOM

or battery-operated AC voltmeter. The "limit" indication is 0.75

V, so analog meters must have an accurate low-voltage scale.

The Simpson 250 and Sanwa SH-63Trd are examples of a pas-

sive VOM that is suitable. Nearly all battery operated digital

multimeters that have a 2 V AC range are suitable. (See Fig. A)