Sony MDS-JE780 Service Manual

MDS-JE780

SERVICE MANUAL

Ver. 1.4 2006.12

US and foreign patents licensed form Dolby Laboratories Licensing Corporation.

SPECIFICATIONS

System MiniDisc digital audio system Disc MiniDisc Laser Semiconductor laser

(λ = 780 nm) Emission duration: continuous

Laser output MAX 44.6 µW1)

1) This output is the value measured at a distance of 200 mm from the objective lens surface on theOptical Pick-up Block with 7 mm aperture.

Laser diode Material: GaAlAs Revolutions (CLV) 400 rpm to 900 rpm Error correction ACIRC (Advanced Cross Interleave

Reed Solomon Code) Sampling frequency 44.1 kHz Coding ATRAC (Adaptive Transform

Acoustic Coding)/ATRAC 3 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 98 dB during play Wow and flutter Below measurable limit

Inputs

ANALOG IN Jack type: phono

Impedance: 47 kilohms

Rated input: 500 mVrms

Minimum input:125 mVrms DIGITAL OPTICAL IN Connector type: square optical

Impedance: 660 nm (optical wave length) DIGITAL COAXIAL IN (European model only)

Jack type: phono

Impedance: 75 ohms

Rated input: 0.5 Vp-p, ±20%

AEP Model

UK Model

E Model

Model Name Using Similar Mechanism MDS-JE480 MD Mechanism Type MDM-7S1A Optical Pick-up Type KMS-260B/260E

Outputs

PHONES Jack type: stereo phone

Rated output: 28 mW Load impedance: 32 ohms

ANALOG OUT Jack type: phono

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

DIGITAL OPTICAL OUT

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

General

Power requirements European model: 230 V AC, 50/60 Hz Other model: 110 – 120/220 – 240 V AC, 50/60 Hz

Adjustable with voltage selector Power consumption 15 W (0.4 W in standby mode) Dimensions (approx.) 430 x 95 x 285 mm (w/h/d) incl.

projecting parts and controls Mass (approx.) 3.1 kg

Supplied accessories

Audio connecting cords (2) Optical cable (1) OpenMG Jukebox CD-ROM (1) Operating instructions for OpenMG Jukebox (1) Remote commander (remote) (1) R6 (size-AA) batteries (2) USB cable (1) Instruction manual

Design and specifications are subject to change without notice.

9-874-014-05

MINIDISC DECK

Sony Corporation

Home Audio Division Published by Sony Techno Create Corporation

MDS-JE780

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.

VARNING

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

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.

VAROITUS

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

This caution label is located inside the unit.

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.

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 .

MDS-JE780

Take out the MD and close the recordprotect 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.

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.

Take out the MD and insert it again.

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,

he digital connecti ng cable

Check the connection 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.

There is a problem with the loading. ,The loading may have failed. Consult your nearest Sony dealer.

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

Cause/Remedy

Three- or fivedigit code/ Message

Cause/Remedy

C11/Protected

C12/Cannot Copy

C13/REC Error

rC13/Read Erro

C14/Toc Error

C41/Cannot Copy

C71/Din Unlock

E0001/ MEMORY NG

E010

E0201/ LOADING NG

LASER NG

The inserted MD is record-protected.

The recording was not made properly.

The deck could not read the TOC on the

MD properly.

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

may have been

incompletely connected and come loose or the digital component was turned off.

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)”.

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 exit the mode.

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.

MDS-JE780

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

spdl 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 chang?”. 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 lAMSL knob when displayed as “spdl change”

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

knob when displayed as “op change”.

MDS-JE780

Ver. 1.2

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.

MODEL IDENTIFICATION

— BACK PANEL —

MODEL

AEP and RU models

UK model

SP model

• Abbreviation

SP : Singapore model RU : Russian model

Description

Par t No.

PARTS No.

4-238-939-1s 4-238-939-2s 4-238-939-5s

TABLE OF CONTENTS

1. SERVICING NOTES ........................................................ 6

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

3. DISASSEMBLY

3-1. Disassembly flow .............................................................. 12

3-2. Upper Case ........................................................................ 13

3-3. Front Panel Section ........................................................... 13

3-4. USB Board, Main Board ................................................... 14

3-5. PT Board, VOL SEL Board (SP model only) ................... 14

3-6. Mechanism Deck Section ( MDM-7S1A) ........................ 15

3-7. Over Light Head (HR901), BD Board .............................. 15

3-8. Holder Assy ....................................................................... 16

3-9. Loading Motor Assy (M103) ............................................ 16

3-10. Sled Motor Assy (M102), Slider ....................................... 17

3-11. Optical Pick-up (KMS-260B/260E) .................................. 17

3-12. Spindle Motor Assy (M101) ............................................. 18

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

5. ELECTRICAL ADJUSTMENTS ............................... 23

6. DIAGRAMS

6-1. Circuit Boards Location ...................................................... 33

6-2. Block Diagrams

• BD Section ....................................................................... 34

• Main Section .................................................................... 35

6-3. Printed Wiring Board – BD Board – ................................... 36

6-4. Schematic Diagram – BD Section (1/2) – ........................... 37

6-5. Schematic Diagram – BD Section (2/2) – ........................... 38

6-6. Schematic Diagram – Main Section (1/2) – ........................ 39

6-7. Schematic Diagram – Main Section (2/2) – ........................ 40

6-8. Printed Wiring Board – Main Section – ............................. 41

6-9. Printed Wiring Board – Display Section – .......................... 42

6-10. Schematic Diagram – Display Section – .......................... 43

6-11. Printed Wiring Board – USB/Power Section – ................ 44

6-12. Schematic Diagram – USB/Power Section – ................... 45

6-13. IC Pin Function Description ........................................... 46

6-14. IC Block Diagrams ........................................................... 51

7. EXPLODED VIEWS

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

7-2. Chassis Section-2 ................................................................ 55

7-3. Front Panel Section ............................................................. 56

7-4. Mechanism Section-1 (MDM-7S1A) ................................. 57

7-5. Mechanism Section-2 (MDM-7S1A) ................................. 58

8. ELECTRICAL PARTS LIST ........................................ 59

MDS-JE780

SECTION 1

SERVICING NOTES

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

CN10

I+3V Iop GND TE FE VC RF

for

MDM-7S1

I+3V

GND

Iop

I+3V

Iop

GND

FE VC RF

Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP IS 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, record the Iop value on the optical pick-up according to the following procedure.

Record Procedure:

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 Procedure:

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.

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 26)

• 5-10. LASER POWER ADJUSTMENT (See page 29)

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)

MDS-JE780

KSN-260B

Hold on SL base

APC variable resistor

Adhesive agent at PDIC portion

• CLEANING THE OPTICAL PICK-UP

Note 1: In cleaning the lens, do not apply an excessive force

As the optical pick-up is vulnerable, application of excessive force could damage the lens holder.

Note 2: In cleaning, do not use a cleaner other than exclusive

cleaning liquid. (KK-91 or isopropyl alcohol)

Note 3: Wipe the obujective lens spirally from center toward

outside. (See Figure A)

Note 4: Eject the disc, if loaded. Note 5: Disconnect the power cord from the socket to shut off

the power supply.

FPC retainer plate

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

(Figure A)

MDS-JE780

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 26)

• 5-6-3. Iop Compare (see page 26)

• 5-6-4. Auto Check (see page 27)

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 CN404, and then attach it again.

[MAIN BOARD] (Component Side)

CN404

NOTES ON REPLACING BD BOARD OR MD MECHANISM DECK

In replacing the BD board or MD mechanism deck, perform the work through the steps provided below:

1. Remove the IC195 from the BD board to be replaced.

2. Remove the IC195 from new BD board.

3. Mount the IC195 on new BD board, which was removed from the BD board to be replaced.

4. Install new BD board in the set.

Note: The IC195 cannot be replaced with a new part.

– BD BOARD

(Conductor Side) –

OPERATION CHECK IN NORMAL MODE

Aiso in checking the recording and other functions, connect the set to the PC with a USB cable and perform the operation on the application software “OpenMG Jukebox” attached.

IC195

CN103 CN102

12723

MDS-JE780

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 knob to display “All Erase?” on the fluorescent display.

4. Press YES button or l AMS L knob 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 “T OC” disappears, disconnect the power plug from the outlet.

If the test mode cannot be exited, refer to “Forced Reset” on page 8.

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

RTs@@c##e***

Fluorescent display tube display

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

Reading the Retry Cause Display

Higher Bits Lower Bits

Hexadecimal

Bit

Binary

84218421

b7 b6 b5 b4 b3 b2 b1 b0

00000001

00000010

00000100 00001000 00010000 00100000 01000000 10000000

Hexa-

decimal

04 08 10 20 40 80

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 continuously 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”.

Hexadecimal t Binary Conversion Table

Hexadecimal Binary Hexadecimal Binary

0 1 2 3 4 5 6 7

0000 0001 0010 0011 0100 0101 0110 0111

8 9 A B C D E F

1000 1001 1010 1011 1100 1101 1110 1111

MDS-JE780

Reading the Track Mode Display

Higher Bits Lower Bits

Hexadecimal

Bit

Binary

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”.

84218421

b7 b6 b5 b4 b3 b2 b1 b0

00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000

Hexa-

decimal

01 02 04 08 10 20 40 80

When 0 When 1

Emphasis OFF Monaural This is 2-bit display. Normally 01. 01:Normal audio. Others:Invalid Audio (Normal) Original Copyright Write prohibited

Details

Emphasis ON Stereo

Invalid Digital copy No copyright 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

0 1 2 3 4 5 6 7

0000 0001 0010 0011 0100 0101 0110 0111

9 A B C D E

1000 1001 1010 1011 1100 1101 1110 1111

Main unit

MDS-JE780

SECTION 2

GENERAL

This section is extracted from instruction manual.

ALPHBAETICAL ORDER

A - M

AMS wj (14) (21) (27) (39) (43) CLEAR wh (24) (33) (43) Display window wa EJECT A 8 (1 0) (21) (26) GROUP ON/OFF 3 (11) (23)

(34) GROUP SKIP 4 (12) (23) (34) INPUT ws (10) KEYBOARD jack qj (43) LEVEL/DISPLAY/CHAR w; (10)

(16) (21) (32) MD insertion slot 6 (10) (20) MDLP indicator 7 (14) (21) MENU/NO qs (14) (21) (26) (39)

(43)

3 4 5

N - Y

NET MD 5 (9) PHONE LEVEL qh (21) PHONES jack qg (17) (21) (40) PLAY MODE qk (20) (42) REC MODE wf (13) REC z wg (10) (14) (17) Remote sensor 2 (8) REPEAT ql (20) STANDBY indicator 1 (10) (20) TIMER

qf (42)

YES qd (14) (25) (27) (39) (43)

7 8 9 0 qa qs qd

BUTTON DESCRIPTIONS

?/1 1 (10) (20) (26) H 9 (10) (20) (42) (44) X 0 (10) (21) (44) x qa (10) (21) (26) (42) (44) m/M wd (21) (28) (44)

STANDBY

?/1

TIMER

RECOFF PLAY

PHONES PHONE LEVEL KEYBOARD

MIN MAX

qh qj

GROUP

ON/OFF SKIP NET MD

PLAY MODE REPEAT

DISPLAY/CHAR

LEVEL/

EJECT

MDLP

INPUT REC MODE

MENU/

REC

CLEAR

wg wjwh

AMS

PUSH ENTER

YES

MDS-JE780

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

3-1. DISASSEMBLY FLOW

SET

3-2 UPPER CASE

SECTION 3

DISASSEMBLY

• Abbreviation SP : Singapore model

3-3 FRONT PANEL SECTION

3-4 USB BOARD, MAIN BOARD

3-10 SLED MOTOR ASSY (M102)

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

3-7 BD BOARD

3-8 HOLDER ASSY

3-9 LOADING MOTOR ASSY (M103)

3-6 MECHANISM DECK SECTION (MDM-7S1A)

3-7 OVER LIGHT HEAD (HR901)

3-7 BD BOARD

3-8 HOLDER ASSY

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

3-12 SPINDLE MOTOR ASSY (M101)

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.

3-2. UPPER CASE

Two screws

(CASE 3TP2)

Upper case

Screw

(CASE 3TP2)

MDS-JE780

Two screws

(CASE 3TP2)

3-3. FRONT PANEL SECTION

Lead with connector

Claw

Lead with connector

Connector (CN830)

Connector (CN390)

Lead with connector

Two screws

(+BVTP3x8)

Front panel

Two screws

(+BVTP3x8)

Claw

Wire (flat type) (CN3)

MDS-JE780

)

Ver. 1.2

3-4. USB BOARD, MAIN BOARD

Wire (flat type) (CN1)

Wire (flat type) (CN2)

Two screws

(+BVTP3x8)

Connector (CN400)

MAIN board

Wire (flat type) (CN201)

USB board

Holder, PC board

Screw (+BVTP3x6)

Three screws

(+BVTP3x8)

Screw

(+BVTP3x8

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

PT board

Connector (CN900)

Nylon rivet (ø3)

Screw

(+BVTT 2X3)

Lead wire

Three screws

(+PTTWH M3)

SP model only

Connector (CN991)

(+BVTP3x8)

AEP, UK, RU model only

SP model only

Two screws

VOL SEL board

3-6. MECHANISM DECK SECTION (MDM-7S1A)

)



Two step screws

(+BVTTWH M3)



Lead with connector



Mechanism deck (MDM-7S1A)



Two step screws

(+BVTTWH M3)

MDS-JE780

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.



Over light head (HR901)



Remove the solder (four portion)





Screw (P1.7X6)



BD board



Connector (CN104



Remove the solder (five portion)



Two screws (BTP2X6)



FLEXIBLE board (CN101)

MDS-JE780

3-8. HOLDER ASSY

Screw

(+BVTT 2X3)

Tension spring (holder)

Lead with connector

Boss

Holder Assy

Boss

Claw

3-9. LOADING MOTOR ASSY (M103)

Two screws (PWH1.7x2.5)

Belt (loading)

Loading motor Assy (M103)

)

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

Slider (EJ)

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

MDS-JE780

Two screws (BTP2X6)

Guide (L)

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

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

Optical pick-up

(KMS-260B/260E)

Gear (SD)

Main shaft

Two screws (K2X6)

Screw (BTP2X6

Base (BU-A)

MDS-JE780

3-12. SPINDLE MOTOR ASSY (M101)

Spindle motor Assy (M101)

Three screws (M1.7), tappin

MDS-JE780

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 ADJUST) (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 ADJUST) (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

Left or Right

AMS knob

Push

Cancel or move to top hierarchy Set Select Set submenu

Function

4-5. SELECTING THE TEST MODE

There are 25 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.

MDS-JE780

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 3.

• 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.

4-5-1. Operating the Continuous Playback Mode

1. Entering the continuous playback mode

1 Set the disc in the unit. (Whichever recordable discs or discs for playback only are available.) 2 Rotate the l AMS L knob and display “CPLAY1 MODE”(C34). 3 Press the YES button to change the display to “CPLAY1 MID”. 4 When access completes, the display changes to “C = AD = ”.

Note : The numbers “ ” displayed show you error rates and ADER.

2. Changing the parts to be played back

1 Press the YES button during continuous playback to change the display as below.

“CPLAY1 MID” t “CPLAY1 OUT” t “CPLAY1 IN”

When pressed another time, the parts to be played back can be moved.

2 When access completes, the display changes to “C = AD = ”. Note : The numbers “ ” displayed show you error rates and ADER.

3. Ending the continuous playback mode

1 Press the MENU/NO button. The display will change to “CPLAY1 MODE”(C34). 2 Press the AEJECT button to remove the disc.

Note : The playback start addresses for IN, MID, and OUT are as follows.

IN 40h cluster MID 300h cluster OUT 700h cluster

MDS-JE780

4-5-2. Operating the Continuous Recording Mode (Use only when performing self-recording/playback check.)

1. Entering the continuous recording mode

1 Set a recordable disc in the unit. 2 Rotate the l AMS L knob and display “CREC 1MODE” (C35). 3 Press the YES button to change the display to “CREC1 MID”. 4 When access completes, the display changes to “CREC 1 ( )” and REC lights up.

Note : The numbers “ ” displayed shows you the recording position addresses.

2. Changing the parts to be recorded 1 When the YES button is pressed during continuous recording, the display changes as below.

“CREC1 MID” t “CREC1 OUT” t “CREC1 IN”

When pressed another time, the parts to be recorded can be changed. REC goes off.

2 When access completes, the display changes to “CREC 1 ( )” and REC lights up. Note : The numbers “ ” displayed shows you the recording position addresses.

3. Ending the continuous recording mode

1 Press the MENU/NO button. The display changes to “CREC1 MODE” (C35) and REC goes off. 2 Press the A EJECT button to remove the disc.

Note 1 : The recording start addresses for IN, MID, and OUT are as follows.

IN 40h cluster MID 300h cluster OUT 700h cluster

Note 2 :The MENU/NO button can be used to stop recording anytime. Note 3 :Do not perform continuous recording for long periods of time above 5 minutes. Note 4 :During continuous recording, be careful not to apply vibration.

4-6. FUNCTIONS OF OTHER BUTTONS

Function

x M m

REC MODE PLAY MODE LEVEL/DISPLAY/CHAR

REPEAT

Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking servo turns ON/OFF. Stops continuous playback and continuous recording. The sled moves to the outer circumference only when this is pressed. The sled moves to the inner circumference only when this is pressed. Switches between the pit and groove modes when pressed. Switches the spindle servo mode (CLV S y CLV A). Switches the displayed contents each time the button is pressed. Ejects the disc. Exits the test mode.

Contents

4-7. TEST MODE DISPLAYS

Each time the LEVEL/DISPLAY/CHAR button is pressed, the display changes in the following order. When CPLAY and CREC are started, the display will forcibly be switched to the error rate display as the initial mode.

1. Mode display

Displays “TEMP ADJUS” (C03), “CPLAY1MODE” (C34), etc.

2. Error rate display

Displays the error rate in the following way.

C = AD = C = Indicates the C error. AD = Indicates ADER.

3. Address display

The address is displayed as follows. (MO:recordable disc, CD:playback only disc) If the REC MODE button is pressed , the display switches from groove to pit or vice versa. h = s = (MO pit and CD) h = a = (MO groove) h = Indicates the header address. s = Indicates the SUBQ address. a = Indicates the ADIP address.

Note: “–” is displayed when the address cannnot be read.

Auto gain display (Not used in servicing)

Detrack check display (Not used in servicing)

IVR display (Not used in servicing)

Mode display

Error rate display

Address display

C1 error and Jitter display

(Not used in servicing)

AD error and Jitter display

(Not used in servicing)

+ 47 hidden pages