Sony MDSJE-470 Service manual

MDS-JE470

SERVICE MANUAL

Ver. 1.3 2005.03

US and foreign patents licensed form Dolby Laboratories Licensing Corporation.

SPECIFICATIONS

US Model

Canadian Model

AEP Model

UK Model

E Model

Australian Model

Model Name Using Similar Mechanism MDS-S50

MD Mechanism Type MDM-7A

Optical Pick-up Type KMS-260B/260E

System MiniDisc digital audio system Disc MiniDisc Laser Semiconductor laser

Laser output MAX 44.6 µW

1) 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 ACIRC (Advanced Cross Interleave

Sampling frequency 44.1 kHz Coding ATRAC (Adaptive TRansform Acoustic

Modulation system EFM (Eight-to-Fourteen Modulation) Number of channels 2 stereo channels Frequency response 5 to 20,000 Hz ±0.3 dB Signal-to-noise ratio Over 96 dB during play Wow and flutter Below measurable limit

Inputs

ANALOG IN Jack type: phono

DIGITAL OPTICAL IN Connector type: square optical

( λ = 780 nm) Emission duration: continuous

Reed Solomon Code)

Coding)/ATRAC 3

Impedance: 47 kilohms Rated input: 500 mVrms Minimum input: 125 mVrms

Impedance: 660 nm (optical wave length)

Outputs

ANALOG OUT Jack type: phono

Rated output: 2 Vrms (at 50 kilohms) Load impedance: over 10 kilohms

General Power requirements

U.S.A. and Canadian models: 120 V AC, 60Hz European model: 230 V AC, 50/60Hz Australian model: 240 V AC, 50/60Hz Hong Kong model: 220 – 240 V AC, 50/60Hz Other models: 110 – 120/220 – 240 V

AC, 50/60Hz

Adjustable with voltage selector Power consumption 14 W (0.5 W in standby mode) Dimensions (approx.) 430 x 95 x 285 mm

(w/h/d) incl. projecting parts and controls Mass (approx.) 3.0 kg

Supplied accessories

Audio connecting cords (2) Optical cable (1) Remote commander (remote) (1) R6 (size-AA) batteries (2)

Design and specifications are subject to change without notice.

9-873-891-14

2005C02-1

MINIDISC DECK

Sony Corporation

Audio Group

Pubulished by Sony Engineering Corporation

MDS-JE470

Ver 1.1 2002.03

CAUTION

Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer’s instructions.

ADVARSEL!

Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.

Udskiftning må kun ske med batteri

af samme fabrikat og type.

Levér det brugte batteri tilbage til leverandøren.

ADVARSEL

Eksplosjonsfare ved feilaktig skifte av batteri.

Benytt samme batteritype eller en tilsvarende type

anbefalt av apparatfabrikanten.

Brukte batterier kasseres i henhold til fabrikantens

instruksjoner.

Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller en likvärdig typ som rekommenderas av apparattillverkaren. Kassera använt batteri enligt gällande föreskrifter.

Paristo voi räjähtää, jos se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.

VARNING

VAROITUS

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 SelfDiagnosis Function (Error History Display Mode)”.

Three- or five-

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- or five-digit code and an error message on the display . I f the code and message alternate, f ind th em in the following table and perform the indicated countermeasure. Should the problem persist, consult your nearest Sony dealer.

Three- or fivedigit code/ Message

C11/Protected

C12/Cannot Copy

C13/REC Error

C13/Read Error

Cause/Remedy

The inserted MD is record-protected.

Take out the MD and close the record-

protect slot.

You tried to record a CD with a format that the external device connected to the deck does not support, such as CD-ROM or video CD.

Remove the disc and insert a music

CD.

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.

The deck could not read the TOC on the MD properly.

Take out the MD and insert it again.

digit code/ Message

C14/Toc Error

C41/Cannot Copy

C71/Din Unlock

E0001/ MEMORY NG

E0101/ LASER NG

Cause/Remedy

The deck could not read the TOC on the MD properly.

Insert another disc.

If possible, erase all the tracks on the

MD.

The sound source is a copy of commercially available music software, or you tried to record a CD-R (Recordable CD).

The Serial Copy Management System

prevents making a digital copy You cannot record a CD-R.

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

While recording from a dig ital comp one nt connected through the DIGIT AL IN connector, the digital connecting cable was unplugged or the digital component turned off.

Connect the cable or turn the digital

component back on.

There is an error in the internal data that the deck needs in order to operate.

Consult your nearest Sony dealer.

There is a problem with the optical pickup.

The optical pick-up may have failed.

Consult your nearest Sony dealer.

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 MENU/NO button to e xit the mode.

MDS-JE470

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

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

2. Rotate the lAMSL knob and when “[Service]” is displayed, press the YES button.

3. Rotate the lAMSL knob and display “Err Display”.

4. Pressing the YES button sets the error history mode and displays “op rec tm”.

5. Select the contents to be displayed or executed using the lAMSL knob.

6. Pressing the lAMSL knob will display or execute the contents selected.

7. Pressing the lAMSL knob another time returns to step 4.

8. Pressing the MENU/NO button displays “Err Display” and exits the error history mode.

9. To exit the test mode, press the REPEAT button. The unit sets into the STANDBY state, the disc is ejected, and the test mode ends.

ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS

Selecting the Test Mode

Display

op rec tm

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.

History

op play tm

spdl rp tm

retry err

total err

err history

retry adrs

er refresh

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 lAMSL 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 lAMSL knob.

Mode for erasing the error and retry address histories Procedure

1. Press the lAMSL knob when displayed as “er refresh”.

2. Press the YES 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.

tm change

op change

Mode for erasing the total time of recording and playback Procedure

1. Press the lAMSL knob when displayed as “tm refresh”.

2. Press the YES 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 lAMSL

2. Press the YES button when the display changes to “op change?”. When “Complete!” is displayed, it means erasure has completed.

knob when displayed as “op change”.

MDS-JE470

Display

spdl change

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.

History

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 lAMSL knob when displayed as “spdl change”

2. Press the YES button when the display changes to “spdl change?” When “Complete!” is displayed, it means erasure has completed.

TABLE OF CONTENTS

Description

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

2. GENERAL ........................................................................ 12

3. DISASSEMBLY

3-1. Disassembly flow .............................................................. 13

3-2. Upper Case (408226) ........................................................ 14

3-3. Front Panel Section ........................................................... 14

3-4. Main Board ....................................................................... 15

3-5. PT Board, VOL-SEL Board (SP model) ........................... 15

3-6. Mechanism Deck Section ( MDM-7A) ............................. 16

3-7. Over Light Head (HR901), BD Board .............................. 16

3-8. Holder Assy ....................................................................... 17

3-9. Loading Motor Assy (M103) ............................................ 17

3-10. Sled Motor Assy (M102), Slider ....................................... 18

3-11. Optical Pick-up.................................................................. 18

3-12. Spindle Moter Assy (M101).............................................. 19

4. TEST MODE ......................................................................20

MODEL IDENTIFICATION

— BACK PANEL —

MODEL

AEP, UK models

US model

CND model

SP models

HK model

AUS model

• Abbreviation CND : Canadian model SP : Singapore model HK : Hong Kong model AUS : Australian model

Part No.

PARTS No.

4-233-025-0s

4-233-025-1s

4-233-025-2s

4-233-025-3s

4-233-025-4s

4-233-025-5s

5. ELECTRICAL ADJUSTMENTS ............................... 25

6. DIAGRAMS

6-1. Circuit Boards Location ...................................................... 36

6-2. Block Diagrams

• BD Section ....................................................................... 38

• Main Section .................................................................... 39

6-3. Printed Wiring Board – BD Board – ................................... 40

6-4. Schematic Diagram – BD Section (1/2) – ........................... 41

6-5. Schematic Diagram – BD Section (2/2) – ........................... 42

6-6. Schematic Diagram – Main Section (1/2) – ........................ 43

6-7. Schematic Diagram – Main Section (2/2) – ........................ 44

6-8. Printed Wiring Board – Main Section – ............................. 45

6-9. Printed Wiring Board – Display Section – .......................... 46

6-10. Schematic Diagram – Display Section – .......................... 47

6-11. Printed Wiring Board – Power Section – ......................... 48

6-12. Schematic Diagram – Power Section – ............................ 49

6-13. IC Block Diagrams ........................................................... 50

6-14. IC Pin Functions ............................................................... 52

7. EXPLODED VIEWS

7-1. Chassis Section ................................................................... 59

7-2. Front Panel Section ............................................................. 60

7-3. Mechanism Section-1 (MDM-7A) ...................................... 61

7-4. Mechanism Section-2 (MDM-7A) ...................................... 62

8. ELECTRICAL PARTS LIST ........................................ 63

SECTION 1

SERVICE NOTES

MDS-JE470

SAFETY CHECK-OUT

(US model only)

After correcting the original service problem, perform the following safety checks 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

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 microampers). Leakage 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 passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)

To Exposed Metal Parts on Set

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.

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.

This caution label is located inside the unit.

0.15µF

1.5kΩ

Earth Ground

AC voltmeter (0.75V)

Fig. A. Using an AC voltmeter to check AC leakage.

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.

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation 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.

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.

MDS-JE470

JIG FOR CHECKING BD BOARD WAVEFORM

The special jig (J-2501-196-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be performed are shown as follows.

GND : Ground I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser) IOP : For measuring IOP (Check the deterioration of the optical pick-up laser) TE : TRK error signal (Traverse adjustment) VC : Reference level for checking the signal RF : RF signal (Check jitter) FE : Focus error signal

I+3V

GND

IOP

I+3V

IOP

GND

FE VC RF

CN105

I+3V Iop GND TE FE VC RF

for

MDM-7A

MDS-JE470

Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF BD BOARD) ARE REPLACED

The Iop value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to look at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD board), record the Iop value on the optical pick-up according to the following procedure.

Record Precedure:

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

2. Rotate the l AMS L knob to display “[Service]”, and press the YES button.

3. Rotate the l AMS L knob to display “Iop Write” (C05), and press the YES button.

4. The display becomes “Ref=@@@.@” (@ is an arbitrary number) and the numbers which can be changed will blink.

5. Input the Iop value written on the optical pick-up. To select the number : Rotate the l AMS L knob. To select the digit : Press the l AMS L knob.

6. When the YES button is pressed, the display becomes “Measu=@@@.@” (@ is an arbitrary number).

7. As the adjustment results are recorded for the 6 value. Leave it as it is and press the YES button.

8. “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop Write”.

9. Press the REPEAT button to complete.

Display Precedure:

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

2. Rotate the l AMS L knob to display “[Service]”, and press the YES button.

3. Rotate the l AMS L knob to display “Iop Read” (C26).

4. “@@.@/##.#” is displayed and the recorded contents are displayed. @@.@ : indicates the Iop value labeled on the optical pick-up. ##.# : indicates the Iop value after adjustment

5. To end, press the l AMS L button or MENU/NO button to display “Iop Read”. Then press the REPEAT button.

MDS-JE470

OPTICAL PICK-UP BLOCK TYPE DISCRIMINATION

There are two types of the optical pick-up block in this model. These are compatible except for the laser power. Check the type of the optical pick-up block before replacement. Ajdust following items after replacing the optical pick-up block.

• 5-6-2. Laser Power Check (See page 28)

• 5-10. LASER POWER ADJUSTMENT (See page 31)

Differences

KMS-260B KMS-260E

Color of the adhesive agent at PDIC portion Pink White

Form of FPC retainer plate Close the hole on SL base Not close the hole on SL base

APC variable resistor Small volume (2 type)

Fig. B type is for repair.

• Abbreviation

260B: KMS-260B model

260E: KMS-260E model

Big variable resistor (3 type) and chip resistor (Fig. A)

Small variable resistor (2 type) and chip resistor (Fig. B)

Hold on SL base

Adhesive agent at PDIC portion

KSN-260B

FPC retainer plate

APC variable resistor

Hold on SL base

Adhesive agent at PDIC portion

KSN-260E

FPC retainer plate

(Fig A)

CHIP

3 type variable resistor

(Fig B)

CHIP

2 type variable resistor

MDS-JE470

CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS

Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”.

• 5-6-2. Laser power check (see page 28)

• 5-6-3. Iop Compare (see page 28)

• 5-6-4. Auto Check (see page 29)

Note:

The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments. When performing adjustments, use the specified values for adjustments.

FORCED RESET

The system microprocessor can be reset in the following procedure. Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.

Procedure :

Remove the short-pin attached to CN406, and then attach it again.

[MAIN BOARD] (Component Side)

CN406

MDS-JE470

RETRY CAUSE DISPLAY MODE

• In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. During playback, the “track mode” for obtaining track information will be set. This is useful for locating the faulty part of the unit.

• The following will be displayed : During recording and stop : Retry cause, number of retries, and number of retry errors. During playback : Information such as type of disc played, part played, copyright. These are displayed in hexadecimal.

Procedure:

1. Insert the recordable disc.

2. Press MENU/NO button to display “Edit Menu” on the fluorescent display.

3. Turn l AMS L button to display “All Erase?” on the fluorescent display.

4. Press YES button to display “All Erase??” on the fluorescent display.

5. Press YES button, “Complete!” is displayed on the fluorescent display and it turns off immediately.

6. Procedure 1: Press the x button continuously for about 10 seconds.

Procedure 2: Press the LEVEL/DISPLAY/CHAR button while pressing the x button and MENU/NO button.

7. When the mode is set, “RTs 00c 00e 000” is displayed.

8. Press the z REC button to start recording. Then press the X button and start recording.

9. To check the “track mode”, press the H button to start play.

10.To exit the test mode, press the @/1 button, and turn OFF the power. When “TOC” disappears, disconnect the power plug from the outlet.

If the test mode cannot be exited, refer to “Forced Reset” on page 9.

Fig. 1 Reading the Test Mode Display (During recording and stop)

RTs@@c##c***

Fluorescent display tube display

@@ : Cause of retry ## : Number of retries *** : Number of retry errors

Reading the Retry Cause Display

Lower Bits

Hexadecimal

Bit

Binary

Higher Bits

84218421

b7 b6 b5 b4 b3 b2 b1 b0

00000001

00000010

00000100

00001000

00010000

00100000

01000000

10000000

Hexa-

decimal

Fig. 2 Reading the Test Mode Display (During playback)

@@###**$$

Fluorescent display tube display

@@ : Parts No. (name of area named on TOC) ### : Cluster ** : Sector $$ : Track mode (Track information such as copyright infor-

Cause of Retry Occurring conditions

shock

ader5

Discontinuous address

DIN unlock

FCS incorrect

IVR rec error

CLV unlock

Access fault

} Address (Physical address on disc)

mation of each part)

When track jump (shock) is detected

When ADER was counted more than five times continu-

ously

When ADIP address is not continuous

When DIN unlock is detected

When not in focus

When ABCD signal level exceeds the specified range

When CLV is unlocked

When access operation is not performed normally

Reading the Display:

Convert the hexadecimal display into binary display. If more than two causes, they will be added.

Example

When 42 is displayed: Higher bit : 4 = 0100 t b6 Lower bit : 2 = 0010 t b1 In this case, the retry cause is combined of “CLV unlock” and “ader5”.

When A2 is displayed: Higher bit : A = 1010 t b7+b5 Lower bit : 2 = 0010 t b2 The retry cause in this case is combined of “access fault”, “IVR rec error”, and “ader5”.

Reading the Track Mode Display

Hexadecimal

Bit

Binary

Higher Bits Lower Bits

84218421

b7 b6 b5 b4 b3 b2 b1 b0

00000001

00000010

00000100

00001000

00010000

00100000

01000000

10000000

Hexa-

decimal

When 0 When 1

Emphasis OFF

Monaural

This is 2-bit display. Normally 01.

01:Normal audio. Others:Invalid

Audio (Normal)

Original

Write prohibited

Details

MDS-JE470

Emphasis ON

Stereo

Invalid

Digital copy

No copyright

Write allowed

Reading the Display:

Convert the hexadecimal display into binary display. If more than two causes, they will be added.

Example When 84 is displayed:

Higher bit : 8 = 1000 t b7 Lower bit : 4 = 0100 t b2 In this case, as b2 and b7 are 1 and others are 0, it can be determined that the retry cause is combined of “emphasis OFF”, “monaural”, “original”, “copyright exists”, and “write allowed”.

Example When 07 is displayed:

Higher bit : 0 = 1000 t All 0 Lower bit : 7 = 0111 t b0+b1+b2 In this case, as b0, b1, and b2 are 1 and others are 0, it can be determined that the retry cause is combined of “emphasis ON”, “stereo”, “original”, “copyright exists”, and “write prohibited”.

Hexadecimal t Binary Conversion Table

Hexadecimal Binary Hexadecimal Binary

0000

0001

0010

0011

0100

0101

0110

0111

1000

1001

1010

1011

1100

1101

1110

1111

MDS-JE470

Parts Identification

The items are arranged in alphabetical order. Refer to the pages indicated in parentheses ( ) for details.

Main unit

SECTION 2

GENERAL

This section is extracted from instruction manual.

STANDBY

TIMER

RECOFF PLAY

PHONES PHONE LEVEL PC LINK

MIN MAX

(KEYBOARD)

AMS wh

(15) (20) (25) (35) (39) CLEAR (23) (30) (40) Display window EJECT (11) (20) (25) GROUP ON/OFF

GROUP

ON/OFF SKIP TIME

LEVEL/

DISPLAY/CHAR

PLAY MODE REPEAT

(13) (22)

(31)

GROUP SKIP INPUT (11)

LEVEL/DISPLAY/CHAR

(13) (22) (31)

(11) (21) (29) MD insertion slot MDLP indicator (14) (21) MENU/NO (15) (22) (25) (35)

(39)

PC LINK (KEYBOARD)

(39)

PHONE LEVEL PHONES jack PLAY MODE (20) (37) REC MODE (14) (22) REC (11)

Remote sensor REPEAT (20)

(21)

(17) (21) (36)

STANDBY indicator (11) (20)

TIME TIMER YES (15) (23) (25) (35) (39)

(17) (21)

(37)

EJECT

MDLP

INPUT REC MODE

REC

MENU/

CLEAR

AMS

PUSH ENTER

YES

BUTTON DESCRIPTIONS

(11) (20) (25)

`/1

(11) (20) (37) (40)

(11) (20) (39) (40)

(11) (20) (25) (37) (40)

x m/M

(20) (26) (40)

1) MDS-JE770 only.

2) MDS-JE770 only. For MDSJE470, the remote sensor is located on the display window.

• This set can be disassembled in the order shown below.

MDS-JE470

SECTION 3

DISASSEMBLY

3-1. DISASSEMBLY FLOW

3-3 FRONT PANEL SECTION

3-4 MAIN BOARD

SET

3-2 UPPER CASE (408226)

3-5 PT BOARD VOL-SEL BOARD (SP model)

3-7 BD BOARD

3-8 HOLDER ASSY

• Abbreviation SP : Singapore

3-6 MECHANISM DECK SECTION (MDM-7A)

3-7 OVER LIGHT HEAD (HR901)

3-7 BD BOARD

3-10 SLED MOTOR ASSY (M102)

Note 1: The processes enclosed with , remove in the any order. Note 2: You cannot go to the next process until every process enclosed with has done.

3-9 LOADING MOTOR ASSY (M103)

3-8 HOLDER ASSY

3-11 OPTICAL PICK-UP (KMS-260B/260E)

3-12 SPINDLE MOTOR ASSY (M101)

MDS-JE470

3-2. UPPER CASE (408226)

Two screws

(CASE 3TP2)

Case (408226)

Screw

(CASE 3TP2)

Two screws

(CASE 3TP2)

3-3. FRONT PANEL SECTION

Claw

Two screws

(+BVTP3x8)

Connector (CN830)

Claw

Connector (CN390)

Wire (flat type) (17core) (CN3)

Front panel

Two screws

(+BVTP3x8)

3-4. MAIN BOARD

Two screws

(+BVTP3x8)

Two screws

(+BVTP3x8)

screw (+BVTP3x8)

Connector (CN400)

Wire (flat type) (23core) (CN1)

Wire (flat type) (27core) (CN2)

MAIN board

MDS-JE470

3-5. PT BOARD, VOL-SEL BOARD (SP model)

VOL-SEL board (SP model)

Connector (CN900)

Connector (CN990) (SP model)

Nylom rivet (dia 3)

PT board

Three screws

(+PTTWH M3)

(+BVTP3x8) (SP model)

Two screws

MDS-JE470

3-6. MECHANISM DECK SECTION (MDM-7A)

Two step screws

(+BVTTWH M3)

Mechanism deck

Two step screws

(+BVTTWH M3)

Harnes

3-7. OVER LIGHT HEAD (HR901), BD BOARD

Note 1: If you disconnect the connector (CN104), you can remove the

BD board without removing the over write head (HR901).

Note 2: Be careful to handle the over write head (HR901) because it is

easy to be damaged.

Head, over light (HR901)

Remove the solder (four portion)

Screw (P1.7X6)

BD board

Connector (CN104)

Remove the solder (five portion)

Two screws (BTP2X6)

FLEXIBLE board (CN101)

3-8. HOLDER ASSY

Spring (holder), tension

Holder ASSY

Boss

MDS-JE470

Claw

3-9. LOADING MOTOR ASSY (M103)

Two screws (PWH1.7x2.5)

Belt (loading)

Motor ASSY, loading (M103)

MDS-JE470

)

3-10. SLED MOTOR ASSY (M102), SLIDER

Slider (EJ)

Remove the claw. Shift the slider in the arrow direction.

Two screws (BTP2X6)

3-11. OPTICAL PICK-UP

Guide (L)

Slider

Lever (CHG)

Lever (head)

Two screws

(PWH1.7X2.5)

Motor ASSY, sle

(M102)

FLEXIBLE board

Screw (P1.7X6)

SL base

Screw (M1.7), tapping

Gear (SD)

Optical pick-up

(KMS-260B/260E)

Main shaft

Two screws (K2X6)

Screw (BTP2X6

Base (BU-A)

3-12. SPINDLE MOTER ASSY (M101)

Spindle motor ASSY (M101)

MDS-JE470

Three screws (M1.7), tapping

MDS-JE470

SECTION 4

TEST MODE

4-1. PRECAUTIONS FOR USE OF TEST MODE

• As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it. Even if the A EJECT button is pressed while the disc is rotating during continuous playback, continuous recording, etc., the disc will not stop rotating. Therefore, it will be ejected while rotating. Be sure to press the A EJECT button after pressing the MENU/NO button and the rotation of disc is stopped.

4-1-1. Recording laser emission mode and operating buttons

• Continuous recording mode (CREC 1MODE) (C35)

• Laser power check mode (LDPWR CHECK) (C13)

• Laser power adjustment mode (LDPWR ADJUS) (C04)

• Iop check (Iop Compare) (C27)

• Iop value nonvolatile writing (Iop NV Save) (C06)

• Traverse (MO) check (EF MO CHECK) (C14)

• Traverse (MO) adjustment (EF MO ADJUS) (C07)

• When pressing the z REC button.

4-2. SETTING THE TEST MODE

The following are two methods of entering the test mode. Procedure 1: While pressing the l AMS L knob and x button, connect the power plug to an outlet, and release the l AMS L

knob and x button. When the test mode is set, “[Check]” will be displayed. Rotating the l AMS L knob switches between the following three groups; ··· y Check y Service y Develop y ···.

Procedure 2: While pressing the l AMS L knob, connect the power plug to the outlet and release the l AMS L knob.

When the test mode is set, “TEMP CHECK” will be displayed. By setting the test mode using this method, only the “Check” group of method 1 can be executed.

NOTE: Do not use the test mode in the [Develop] group.

If used, the unit may not operate normally. If the [Develop] group is set accidentally, press the MENU/NO button immediately to exit the [Develop] group.

4-3. EXITING THE TEST MODE

Press the REPEAT button. The disc is ejected when loaded, and “Standby” display blinks, and the STANDBY state is set.

4-4. BASIC OPERATIONS OF THE TEST MODE

All operations are performed using the l AMS L knob, YES button, and MENU/NO button. The functions of these buttons are as follows.

Function name

MENU/NO button

YES button

AMS knob

Left or Right

Push

Cancel or move to top hierarchy

Set

Select

Set submenu

Function

MDS-JE470

4-5. SELECTING THE TEST MODE

There are 26 types of test modes as shown below. The groups can be switched by rotating the l AMS L knob. After selecting the group to be used, press the YES button. After setting a certain group, rotating the l AMS L knob switches between these modes. Refer to “Group” in the table for details selected. All adjustments and checks during servicing can be performed in the test mode in the Service group.

NOTE: Do not use the test mode in the [Develop] group.

If used, the unit may not operate normally. If the [Develop] group is set accidentally, press the MENU/NO button immediately to exit the [Develop] group.

Display

AUTO CHECK

Err Display

TEMP ADJUS

LDPWR ADJUS

Iop Write

Iop NV Save

EF MO ADJUS

EF CD ADJUS

FBIAS ADJUS

AG Set (MO)

AG Set (CD)

TEMP CHECK

LDPWR CHECK

EF MO CHECK

EF CD CHECK

FBIAS CHECK

ScurveCHECK

VERIFYMODE

DETRK CHECK

0920 CHECK

Iop Read

Iop Compare

ADJ CLEAR

INFORMATION

CPLAY1MODE

CREC 1MODE

No.

Automatic self-diagnosis

C01

Error history display, clear

C02

Temperature compensation offset adjustment

C03

Laser power adjustment

C04

Iop data writing

C05

Writes current Iop value in read nonvolatile memory using microprocessor

C06

Traverse (MO) adjustment

C07

Traverse (CD) adjustment

C08

Focus bias adjustment

C09

Focus, tracking gain adjustment (MO)

C10

Focus, tracking gain adjustment (CD)

C11

Temperature compensation offset check

C12

Laser power check

C13

Traverse (MO) check

C14

Traverse (CD) check

C15

Focus bias check

C16

S-curve check

C17

Nonvolatile memory check

C18

Detrack check

C19

Most circumference check

C25

Iop data display

C26

Comparison with initial Iop value written in nonvolatile memory

C27

Initialization of nonvolatile memory for adjustment values

C28

Display of microprocessor version, etc.

C31

Continuous playback mode

C34

Continuous recording mode

C35

Details

Mark

Group

Check Service

• For details of each adjustment mode, refer to “5. Electrical Adjustments”. For details of “Err Display”, refer to “Self-Diagnosis Function” on page 2.

• If a different mode has been selected by mistake, press the MENU/NO button to exit that mode.

• Modes with (X) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set accidentally, press the MENU/NO button to exit the mode immediately.

+ 49 hidden pages