Sony MDSJA-333-ES Service manual

MDS-JA333ES

SERVICE MANUAL

Photo : GOLD

U.S. and foreign patents licensed from 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 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 Interlea ve

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 100 dB during play Wow and flutter Below measurable limit

)

Inputs

ANALOG IN Jack type: phono

DIGITAL IN OPT1 Connector type: square optical

DIGITAL IN OPT2 Connector type: square optical

DIGITAL IN COAXIAL Jack type: phono

Outputs

PHONES Jack type: stereo phone

ANALOG OUT Jack type: phono

US Model

Canadian Model

AEP Model

UK Model

Model Name Using Similar Mechanism MDS-JA555ES MD Mechanism Type MDM-6J Base Unit Type MBU-5J Optical Pick-up Type KMS-260B/J1N

Impedance: 47 k Ω Rated input: 500 mVrms Minimum input: 125 mVrms

Impedance: 660 nm (optical wave length)

Impedance: 75 Ω Rated input: 0.5 Vp-p, ±20 %

Rated output: 28 mW Load impedance: 32 Ω

Rated output: 2.5 Vrms (at 50 k Ω) Load impedance: over 10 k Ω

— Continued on next page —

MINIDISC DECK

SAFETY CHECK-OUT

DIGITAL OUT OPTICAL

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

DIGITAL OUT COAXIAL

Jack type: phono Rated output: 0.5 Vp-p (at 75 Ω) Load impedance: 75 Ω

General

Power requirements

Where purchased Power requirements

US, Canadian 120 V AC, 60 Hz AEP, UK 230 V AC, 50/60 Hz

Power consumption 20 W Dimensions (approx.) 430 × 123.5 × 375.5 mm (17 × 4

× 14 7/8 in.) (w/h/d) incl. projecting parts and controls

Mass (approx.) 10.5 kg (23 lbs 15 oz)

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.

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 A C 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 microamperes). 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. Follo w 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 v oltmeter . The “limit” indication is 0.75 V, so analog meters must have an accurate low-volta ge scale. The Simpson 250 and Sanwa SH-63Trd are e xamples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)

T o Exposed Metal

Parts on Set

CAUTION

Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the equipment manufacturer. Discard used batteries according to manufacture’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 feilakting skifte av batteri.

Benytt samme batteritype eller en tilsvarende type anbefalt av

apparatfabrikanten.

Brukte batterier katterier kasseres i henhold til fabrikantens

VARNIG

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

VAROITUS

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

0.15

Fig. A. Using an A C v oltmeter to check A C 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.

ATTENTION AU COMPOSANT AYANT RAPPORT

LES COMPOSANTS IDENTIFÉS P AR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMA TIQUES 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.

1.5 k

Ω

Earth Ground

À LA SÉCURITÉ!

Voltmeter (0.75 V)

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.

The following 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.

MODEL IDENTIFICATION — BACK PANEL —

Parts No.

TABLE OF CONTENTS

1. SERVICING NOTE ·························································· 6

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

3. DISAssembly

3-1. Case ·················································································· 16 3-2. Loading Panel··································································· 16 3-3. Front Panel Assembly ·······················································17 3-4. MD Mechanism Deck ······················································ 17 3-5. Tray Assembly·································································· 18 3-6. BU Holder Assembly························································ 19 3-7. Motor (Loading) Assembl y (M10)··································· 19 3-8. Base Unit (MBU-5J) ························································ 20 3-9. BD Board·········································································· 20 3-10. Over Light Head (HR901)················································ 21 3-11. Mini Disc Device (KMS-260B/J1N)································ 21

4. TEST MODE ···································································· 22

5. ELECTRICAL ADJUSTMENTS ······························· 27

6. DIAGRAMS

6-1. Block Diagrams ································································37

Main Section····································································· 37

Display/Power Supply Section ·········································38 6-2. Circuit Board Location ·····················································39 6-3. Printed Wiring Board BD Section ·································· 40 6-4. Schematic Diagram BD Section (1/2) ··························· 41 6-5. Schematic Diagram BD Section (2/2) ··························· 42 6-6. Schematic Diagram BD Switch Section························ 43 6-7. Printed Wiring Board BD Switch Section ······················· 43 6-8. Printed Wiring Board AD Section ································ 44 6-9. Schematic Diagram AD Section···································· 45 6-10. Printed Wiring Board DIO Section ······························46 6-11. Schematic Diagram DIO Section ·································· 47 6-12. Printed Wiring Board DA Section ································· 48 6-13. Schematic Diagram DA Section··································· 49 6-14. Printed Wiring Board DIGITAL Section ·······················50 6-15. Schematic Diagram DIGITAL Section ························ 51 6-16. Schematic Diagram HP Section ··································· 52 6-17. Printed Wiring Board HP Section ································ 53 6-18. Schematic Diagram POWER Section ·························· 54 6-19. Printed Wiring Board POWER Section························ 55 6-20. Printed Wiring Board PANEL Section ························· 56 6-21. Schematic Diagram PANEL Section ···························· 57 6-22. Printed Wiring Board AC Section ································ 58 6-23. Schematic Diagram AC Section ··································· 59 6-22. IC Block Diagrams ···························································61 6-23. IC PinFunction Description·············································· 66

4-228-930-1 : AEP, UK model 4-228-930-2 : US model 4-228-930-3 : Canadian model

7. EXPLODED VIEWS

7-1. Upper Case Assembly ······················································ 73 7-2. Front Panel Assembly ·······················································74 7-3. Chassis Assembly ····························································· 75 7-4. Mechanism Deck Assembly-1 (MDM-6J) ······················· 76 7-5. Mechanism Deck Assembly-2 (MDM-6J) ······················· 77 7-6. Base Unit (MBU-5J) ························································ 78

8. ELECTRICAL PARTS LIST ······································· 79

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)”.

The deck’s self-diagnosis function automatically checks the condition of the MD dec k when an error occurs, then issues a three- or fi ve-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- or fivedigit code/ Message

C11/Protected

C12/Cannot Copy

C13/REC Error

C13/Read Error

C14/Toc Error

C41/Cannot Copy

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.



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.

Three- or fivedigit code/ Message

C71/Din Unlock

E0001/ MEMORY NG

E0101/ LASER NG

Cause/Remedy

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 c ompon ent connected through the DIGITAL IN connector, the digital connecti ng 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 pickup 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 exit the mode.

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

2. Turn the l AMS L knob and when “[Service]” is displayed, press the YES button.

3. Turn the l AMS L knob to display “Err Display”.

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

5. Select the contents to be displayed or executed using the l AMS L knob.

6. Press the l AMS L knob to display or execute the contents selected.

7. Press the l AMS L knob another time to return to step 4.

8. Press the MENU/NO button to display “Err Display” and release the error history mode.

9. To release the test mode, press the REPEAT button. The unit sets into the STANDBY state and the test mode ends.

[ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS]

Display

op rec tm

op play tm

spdl rp tm

retry err

total err

err history

retry adrs

er refresh

op change

spdl change

Details of History

Displays the total recording time.

When the total recording time is one minute or longer, displays the time and minute. When the total recording time is less than one minute, displays “Under 1 min”.

The displayed time is about 1/4 of the actual recording time when the laser is set to the high power state. Displays the total playback time.

When the total playback time is one minute or longer, displays the time and minute. When the total playback time is less than one minute, displays “Under 1 min”.

Displays the total time when the spindle motor rotates.

When the total rotation time is one minute or longer, displays the time and minute. When the total rotation time is less than one minute, displays “Under 1 min”.

Displays the total number of retries during recording and number of retry errors during playback. Displayed as “r xx p yy”. “xx” indicates the number of retries during recording, “yy” indicates the number of retry errors during playback. The numbers are displayed in hexadecimal from 00 to FF.

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

Displays the last ten errors. Displayed as “0x ErrCd@@”. “x” indicates the history number. A smaller number indicates a more recent error (00 is the latest). @@ indicates the error code. The error history number is selected by turning the l AMS L knob.

Displays the last five retry addresses. Displayed as “xx ADRS yyyy”. “xx” indicates the history number. “yyyy” indicates the cluster where the retry occurred. The history number is selected by turning the l AMS L knob.

Mode which erases the error history and the retry address history

[Operation procedure]

1 When “er refresh” is displayed, press the l AMS L knob. 2 After the display changes to “er refresh?”, press the YES button.

The “Complete!” message indicates that the operation has ended.

After executing this mode, be sure to check the following:

• The data has been erased.

• The mechanism runs normally when recording and playback are performed.

Mode which erases the total time of “op rec tm” and “op play tm” These histories are used as a guideline for the time to replace the optical pick-up. After replacing the optical pick-up, perform this operation to erase the history.

[Operation procedure]

1 When “op change” is displayed, press the l AMS L knob. 2 After the display changes to “op change?”, press the YES button.

The “Complete!” message indicates that the operation has ended.

Mode which erases the total time of “spdl rp tm” The history is used as a guideline for the time to replace the spindle motor. After replacing the spindle motor, perform this operation to erase the history.

[Operation procedure]

1 When “spdl change” is displayed, press the l AMS L knob. 2 After the display changes to “spdl change?”, press the YES button.

The “Complete!” message indicates that the operation has ended.

Table of Error Codes

Error Code

Loading error

The combination of loading switches is not acceptable.

Time out. The beginning of PTOC cannot be read.

Contents error. The beginning of PTOC can be read.

Time out. Access to UTOC failed.

Time out. UTOC cannot be read.

Contents error of UTOC

Playback start error

Details of Error

Error Code

31 40 41 42 43 50

Details of Error

There is an abnormality in the sector contents. An error caused a retry during continuous recording. Retry was executed due to DRAM overflow. Retry was executed during TOC writing. S.F Edit was aborted due to retry. Address cannot be read although access processing is not in progress. Runaway due to focus NG

SECTION 1

SERVICING NOTE

HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH IS TURNED OFF, AND LASER POWER CHECK

1 Remove the 16 screws (BVTT3 x 8) from the bottom plate. (Refer to Section 3 “Disassembly” Loading panel.) 2 Remove the bottom plate. 3 Rotate the pully gear in the direction of the arrow A and open the tray in the direction of the arrow B. 4 When checking the laser power, remove beforehand the loading panel by remo ving the two screws (M2.6) and sliding aside the loa ding

panel becouse the cable of the laser power meter can be pinched by the loading panel. (Refer to Section 3 “Disassembly” Loading panel.)

Pulley gear

Remove the Loading panel

Two screws (M2.6)

Tray assembly

Forced Reset

Use this function when the MDS-JA333ES cannot be operated normally due to hung-up of the microprocessor. It is recommended to use this function when you cannot exit the test mode or the retry-cause-display mode, or when the normal operation cannot be performed after the MDS-JA333ES is disassembled once then re-assembled.

T o inspect the printed circuit boards, use the following jigs.

• Extension jig to inspect the DIG board Jig for extension between DIG board CN801 and DA board CN501

Part code number: J-2501-075-A 1 pc 21 pins with 1 mm

Jig for extension between DIG board CN807 and FL board CN701 Part code number: J-2501-199-A 1 pc 21 pins with 1 mm

• Extension jig to inspect the AD board Jig for extension between DIG board CN802 and AD board CN301

Part code number: J-2501-200-A 1 pc 11 pins with 1 mm

[BD Board Waveform Check Tool]

5 6

Use of the exclusive tool (J-2501-149-A) is convenient to check the waveforms on the BD board.

GND : Ground terminal I+3V : For measuring IOP (Checking deterioration of the optical pick-up laser) IOP : For measuring IOP (Checking deterioration of the optical pick-up laser) TEO : TRK error signal (traverse adjustment) VC : Reference level for when checking signals RF : RF signal (jitter check)

CN110

6pin connector

TEO

IOP

I+3V

GND

RF VC TEO

5pin connector

Schematic diagram of the connecting tools

RF VC TEO To MDMIOP I-3V

IOP I+3V

GND

VC RF

To MDM-

TEO

To MDM-

IOP I+3V

GND

[How to Record and Display the IOP Data When Replacing the Optical Pick-up and Non-volatile Memory (BD Board IC171)]

The IOP data that is indicated on the optical pick-up, can be saved in the non-volatile memory of the MDS-JA333ES. Saving the IOP data in the memory eliminates the needs to look at the printed value on the label that is attached on the surface of optical pick-up, and enables to vie w the IOP data on display. When the optical pick-up is replaced or when the non-volatile memory (IC171 on BD board) is replaced, save the IOP value that is printed on the label on the surface of optical pick-up by the following procedure.

How to Record the IOP Data:

1. While pressing the lAMSL knob and the x button at the same time, connect the AC power plug to the wall outlet, then remove

your hands from the lAMSL knob and x button at the same time. When the MDS-JA333ES enters the test mode, the message “[Check]” appears.

2. Rotate the lAMSL knob until the message “Service” appears. Then press the YES button.

3. Rotate the lAMSL knob until the message “Iop Write” (C05) appears. Then press the YES button.

4. “Ref=@@@.@” (@ is arbitrary number) appears and the values that can be changed as desired flash.

5. Input the IOP value that is printed on the optical pick-up.

Selection of alphanumeric characters : Rotate the lAMSL knob. Selection of digit : Press the lAMSL knob.

6. Press the YES button. Then display changes to “Measu= @@@.@” (@ is arbitrary number).

7. The value that is shown step 6, is the result adjustment and should not be saved . So leave the value of step 6 as it is, and press the YES

button.

8. The message “Complete!” appears for a moment, and the value is saved in the non-volatile memory. The message “Iop Write” (C05)

appears.

9. Upon completion of data saving, press the REPEAT button.

How to Display the IOP Data:

1. While pressing the lAMSL knob and the x button at the same time, connect the AC power plug to the wall outlet, then remove

your hands from the lAMSL knob and x button at the same time. When the MDS-JA333ES enters the test mode, the message “[Check]” appears.

2. Rotate the lAMSL knob until the message “Service” appears. Then press the YES button.

3. Rotate the lAMSL knob until the message “Iop Write” (C05) appears. Then press the YES button.

4. The message “@@.@/##.#” appears. The contents that are saved in the non-volatile memory appear.

@@.@ : The IOP value that is printed on optical pick-up ##.# : The IOP value after adjustment

5. To exit the data display, press the lAMSL knob or the MENU/NO button to show the message “Iop Read” (C26). Then press

the REPEAT button.

[Checks before Part Replacement and Adjustment]

Cause of faulty can be approximately located by performing the following checks before starting the repair work. Refer to Section “5. Electrical Adjustment” the check procedure.

Laser power check (Refer to section 5-6-2.)

Traverse check (Refer to section 5-6-3.)

Focus bias check (Refer to section 5-6-4.)

C PLAY check (Refer to section 5-6-5.)

Self record/playback check (Refer to section 5-6-6.)

Temperature compensation offset check (Refer to section 5-6-1.)

Judgment criterion(NG when the measurement

value is out of the specification value)

• 0.9 mW power Specification value: 0.8 to 0.96 mW

• 6.2 mW power Specification value: 6.0 to 6.4 mW

• Iop (when 7 mW) The Iop value that is shown on the optical pick-up: +/- 4 mA

• Traverse waveform Specification value: Offset 5% or less

• Checking the error rate Specification value: All points of a and b CI error 220 or less AD error 2 or less

• Checking the error rate Specification value: a. When using the test disc (MDW-74/AU-1) CI error 50 or less AD error 2 or less b. When using the check disc (TDYS-1) CI error 20 or less

• Checking the error rate in C PLAY Specification value: CI error 50 or less AD error 2 or less

• NG when “T=@@(##)(NG” appears (@@ and ## are arbitrary numbers.)

Remedial measure in case of NG

• Cleaning the optical pick-up

• Readjustment

• Replacing the optical pick-up

In case of NG all the time:

• Replacing the overwrite head

• Check disconnection of the circuits around the overwrite head

In case of intermittent NG:

• Check deformation of overwrite head

• Check mechanism around the sled

• Check disconnection of the circuits around the D101 (BD board)

• Check signals around the IC101, IC121, CN102 and CN103 (BD board)

Note: The judgment criterion is sho wn for the purpose of judging if the performance is acce ptable or not. T his is not the specification value for adjustment.

Use the specification value for adjustment when the MDS-JA333ES is going to be adjusted.

[Retry Cause Display Mode]

• In this test mode, the retry causes of the MDS-J A333ES during r ecord and stop modes can be displayed on the fluorescent display tube. This mode becomes the “track mode” during playback in which the track information is available. This mode is useful for locating the defective area of the MDS-JA333ES.

• The contents to be displayed are as follows. During record and stop modes: Retry cause, number of retries, and number of retry errors During playback mode: Information such as disc types under playing back, position of playback and copyright. Each information is displayed in hexadecimal number.

Procedure:

1. Load a recordable disc whose contents can be erased, into the MDS-JA333ES.

2. Press the MENU/NO button. After the message “Edit Menu” appears on the fluorescent display tube, rota te the lAMSL knob until the message “All Erase ?” appears.

3. Press the YES button. (Alternately the lAMSL knob can also be pressed.)

4. The message “All Erase ?” appears on the fluorescent display tube. Then the numerals on the music calendar flash.

5. Press the YES button, then the message “Complete !” appears. Press the x button immediately, and wait for about 15 seconds while keeping pressing the button. (Alternately the lAMSL knob can be pressed instead of YES button.)

6. When the characters “TOC” have disappeared from the fluorescent display tube, remove your hands from the x button.

7. Press the zREC button to enter the record standby mode. Then press the X button to start recording.

8. When you want to enter the “Track mode”, press the N button to start playback.

9. To exit the test mode , press the ?/1 button. The message “TOC” flashes, the MDS-JA333ES enters the standby mode and exits the test mode.

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

RTs@@c##e** Display on the fluorescent display tube

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

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

@@ ####** $$ Display on the fluorescent display tube

@@ : Parts No. (Area name that is given on the TOC) ## : Cluster address (physical address on the disc) ** : Sector $$ : Track mode (track information such as copyright information of each part, etc.)

How to read the retry cause display:

Higher Bits

Hexadecimal

Bit

Binary number

Reading the Display:

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

84218421

b7 b6 b5 b4 b3 b2 b1 b0

00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000

Lower Bits

Hexadecimal

shock

ader5

Address is not continuous

DIN unlock

FCS unlock

IVR rec error

CLV unlock

Access fault

Name of retry cause When 1

When track jump (shock) is detected When ADER is counted five times or more continuously When ADIP address is not continuos Detects DIN unlock is detected When focus is unlocked When signal level of the ABCD signal exceeds the specified range When CLV is unlocked When access operation is not performed normally

Example When 42 is displayed:

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

Example When A2 is displayed:

Higher bit: A = 1010 → b7+b5 Lower bit: 2 = 0010 → b1 In this case, the retry cause is combined of “Access fault”, “IVR rec” and “ader5”.

The reading of the track mode display is as follows.

Higher Bits Lower Bits

Hexadecimal

Bit

Binary

Reading the Display:

Convert the hexadecimal display of each digit into binary display. The several causes are added and displayed.

Example When 84 is displayed:

Higher bit: 8 = 1000 → b7 Lower bit: 4 = 0100 → b2 This example shows that “Emphasis: OFF”, “Monaural”, “Original”, “Copyright exists” and “Writing is allowed” because b2 and b7 are 1 while all other bits are 0.

Example When 07 is displayed:

Higher bit: 0 = 0000 → all 0 Lower bit: 7 = 0111 → b0+b1+b2 This example shows that “Emphasis: ON”, “Stereo”, “Original”, “Copyright exists” and “Writing is prohibited” because b0, b1 and b2 are 1 while all other bits are 0.

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

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

Details

When 1

Emphasis ON Stereo

Invalid Digital copy No copyright Write is allowed

Hexadecimal → 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

Front panel description

SECTION 2

GENERAL

This section is extracted from instruction manual.

ws w;wdwf wa

1 ?/1 (power) switch/STANDBY indicator (14) (23)

Press to turn on the deck. When you turn on the deck, the STANDBY indicator turns off. When you press the switch again, the deck turns off and the indicator lights up.

2 Remote sensor (10)

Point the remote toward this sensor (g) for remote operations.

3 FILTER button (43)

Press to select the type of the digital filter.

4 S.F EDIT button (38)

Press to change the recorded level after recording.

5 PLAY MODE button (27) (42)

Press to select Shuffle Play or Program Play or resume normal play.

6 REPEAT button (26)

Press to play tracks repeatedly.

7 TIME button (18) (22)

Press to display the remaining time.

8 DISPLAY/CHAR button (9) (15) (17) (24) (27) (35)

Press while the deck is

Recording or recording pause

Stopped

Recording

Playing

Editing

9 Display window (8)

Shows various information.

0 CLEAR button (27) (35)

Press to cancel the selection.

qa MENU/NO button (19) (27) (30) (39) (52)

Press to display the Edit Menu or Setup Menu.

qs AMS control (12) (14) (23) (30) (39)

Turn to locate tracks, set the clock, select the input characters, or select a menu item and a setting value.

qd YES button (18) (27) (30) (39)

Press to carry out the selected operation.

qf DIGITAL REC LEVEL control (17)

Turn to adjust the digital recording level.

qg ANALOG REC LEVEL L/R control (18)

Turn to adjust the analog recording level.

Adjust the recording level Display disc information or

the contents of a program Display information on the track being recorded Display information on the current track Select the type of characters to be input

9 

qh OPEN/CLOSE A button (14) (23)

Press to insert or eject the MD.

N button (14) (23)

Press to start play.

X button (14) (23)

Press to pause play or recording. Press again to resume play or recording.

x button (15) (23)

Press to stop play or recording, or cancel the selected operation.

z button (14) (18) (19)

Press to record to the MD, monitor the input signal, or mark track numbers.

qj m / M buttons (25) (27) (30) (35)

Press to locate a portion within a track, change the contents of a program, or change the input character.

qk MDLP indicator (16) (23)

Lights when the deck is playing or recording to an MD in LP2 or LP4 Stereo mode.

ql MD disc tray (14) (23)

Insert an MD as illustrated below.

qs qa qd qf qg78345621

With the arrow

pointing toward

the deck

With the labeled side up

w; REC MODE selector (16)

Use to set the REC MODE to STEREO, MONO, LP2 or LP4.

wa INPUT selector (14)

Use to select the input jack (or connector) of the program source to be recorded.

ws PHONE LEVEL control (23)

Turn to adjust the volume of the headphones.

wd PHONES jack (23)

Connect headphones to this jack.

wf TIMER selector (42)

Use to set the timer for recording (REC) or playing (PLAY). Set to OFF to turn off the timer.

qhqk qjql

Remote control description

OPEN/CLOSE



MENU/NO

YES

SHUFFLE

7 12 17 22

CHAR





TIME

PROGRAM

RECORDED

A B

A.SPACE

(

NUM





T.REC MUSIC SYNC

FILTER

STANDBYSTARTSTOP

9 14 19 24

DISPLAY

ws 

qk

SCROLL

PLAY MODE

CONTINUE

—

REPEAT

NAME IN CLEAR

NAME







CD-SYNC

CD PLAYER FADER

qg

1 ?/1 (power) switch (14) (23)

Press to turn on the deck. When you turn on the deck, the STANDBY indicator on the deck turns off. When you press the switch again, the deck turns off and the indicator lights up.

2 DATE RECORDED button (13) Z

Press to display the recording date and time.

DATE PRESENT button (13) Z

Press to display the current date and time.

3 Letter/number buttons (24) (35) Z

Press to input letters or numbers or select a track.

4 M.SCAN button (24) Z

Press to scan a track within a range of 6 to 20 seconds.

5 A.SPACE button (29) Z

Press to insert a three-second blank space between tracks or to pause play after each track.

6 P.HOLD button (18) Z

Press to turn on and off the Peak Hold Function.

7 CLEAR button (27) (35)

Press to cancel the selection.

 

  

DATE

PRESENT

M.SCAN

)

P.HOLD

DIGITAL REC LEVEL

/ANALOG OUT LEVEL



4 5 6 7 8 9

0 qa

qs

qd

8 x button (15) (23)

Press to stop play or recording, or cancel the selected operation.

9 X button (14) (23)

Press to pause play or recording. Press again to resume play or recording.

0 x button (14) (18) (19)

Press to record to the MD, monitor the input signal, or mark track numbers.

qa MUSIC SYNC button (21) Z

Press to start Music Synchro-recording.

qs T.REC button (20) Z

Press to start Time Machine Recording.

qd DIGITAL REC LEVEL/ANALOG OUT LEVEL +/–

buttons (17) (23) Z

Press to adjust the digital recording or analog output level.

qf FILTER button (43)

Press to select the type of the digital filter.

FADER button (40) Z

Press to perform Fade-in Play/Recording or Fade-out Play/Recording.

qg CD PLAYER X button (21) Z

Press to pause the CD play. Press again to resume CD play.

CD PLAYER ./ > buttons (21) Z

Press to locate tracks on the CD.

qh CD-SYNC STOP button (21) Z

Press to stop CD Synchro-recording.

CD-SYNC START button (21) Z

Press to start CD Synchro-recording.

CD-SYNC STANDBY button (21) Z

Press to enter standby for CD Synchro-recording.

qj m / M buttons (25) (27) (30) (35)

Press to locate a portion within a track, change the contents of a program, or shift the cursor to the right.

qk ./ > buttons (14) (23) (31) (39)

Press to locate tracks, or select a menu item and a setting value.

ql H button (14) (23)

Press to start play.

w; NAME-IN buttons

NAME button (35) Z

Press to add the name or change the name of a track or an MD.

CHAR button (35) Z

Press to select the type of characters to be input.

NUM button (35) Z

Press to input numbers.

wa REPEAT button (26)

Press to play tracks repeatedly.

A y B button (26) Z

Press to select Repeat A-B Play.

ws PLAY MODE buttons

CONTINUE button (27) Z

Press to select normal play.

SHUFFLE button (27) Z

Press to select Shuffle Play.

PROGRAM button (27) Z

Press to select Program Play.

wd DISPLAY button (9) (15) (17) (24) (27)

Press to select the information to be displayed in the window.

SCROLL button (24) Z

Press to scroll the name of a track or an MD.

TIME button (18) (21)

Press to display the remaining time.

wf MENU/NO button (19) (27) (30) (39) (52)

Press to display the Edit Menu or Setup Menu.

YES button (18) (27) (30) (39)

Press to carry out the selected operation.

wg OPEN/CLOSE Z button (14) (23)

Press to insert or eject the MD.

Display window description

1 REMOTE indicator

Lights when the MD is being controlled by an external device connected to the deck.

2 Disc name and track name indicators display

DISC indicator

Lights when the disc information (etc.) is shown.

Name display

Displays disc and track names, Edit Menu parameters, and Setup Menu parameters (etc.). The track name appears instead of the disc name during play. When the MD or the track has no name, “No Name” appears.

TRACK indicator

Lights when the track information (etc.) is shown.

3 Playback indicators

REP indicators (26)

Light when the deck is set to Repeat Play.

• “REP” lights when the deck is set to repeat the entire disc.

• “REP 1” lights when the deck is set to repeat just one track.

• “REP A-B” lights when the deck is set to repeat a specific portion within a track.

SHUF indicator (27)

Lights when the deck is set to Shuffle Play.

PGM indicator (27)

Lights when the deck is set to Program Play.

HS indicator

Lights during playing or playing pause.

4 Recording and editing indicators

L.SYNC indicator (19)

Lights when the deck is set to assign track numbers automatically during analog recording.

Rec mode indicators (16)

These indicators turn off during stereo recording/ playback.

• “MONO” lights when the deck is set to Monaural Recording mode or playing an MD recorded in Monaural Recording mode.

• “LP2” lights when the deck is set to LP2 Stereo Recording mode or playing an MD recorded in LP2 Stereo Recording mode.

• “LP4” lights when the deck is set to LP4 Stereo Recording mode or playing an MD recorded in LP4 Stereo Recording mode.

SYNC indicator (21)

Lights during synchro-recording.

REC indicator

Lights during recording.

TOC indicators (16) (31)

• “TOC” lights to indicate the presence of TOC data that has not been written to the disc. “TOC” flashes when the TOC data is being written.

• “TOC EDIT” lights during edit operations.

5 INPUT indicators (14)

• “OPT1” lights when the program source connected to the DIGITAL IN OPT1 connector is selected.

• “OPT2” lights when the program source connected to the DIGITAL IN OPT2 connector is selected.

• “COAX” lights when the program source connected to the DIGITAL IN COAXIAL jack is selected.

• “ANALOG” lights when the program source connected to the ANALOG IN jacks is selected.

6 Music calendar

Shows all the track numbers within a grid if the MD is a premastered disc, or without a grid if the MD is a recordable disc. If the total number of tracks exceeds 15, B appears to the right of number 15 in the music calendar.

7 SLEEP indicator (41)

Lights when the deck is set to turn off automatically after specified minutes.

8 Level meters

Display the audio signal levels during playing and recording.

Note

The display format that you have selected in each of the deck statuses (play, recording, etc.) will appear whenever the deck enters that status and you press DISPLAY/CHAR (or DISPLAY) or TIME until you change the format to another (see the following sections for details). If you disconnect the AC power cord, however, all the displays will revert to their default (i.e., the factory set display) the next time you turn on the deck.

To change the display in stop mode

Press DISPLAY/CHAR (or DISPLAY) repeatedly to change the display.

Each press of the button changes the display as follows:

Total number of tracks, total recorded time and disc name

The contents of a program (only when “PGM” lights up)

Level of the input signal (setting value of the recording level)

Pitch display

DF (digital filter) display

1) “No Name” appears when the disc has no name.

Rear panel description

4567123

DII I

COI

1 ANALOG IN jacks (11) (14)

Use to input analog signals from other components.

2 ANALOG OUT jacks (11)

Use to output analog signals to other components.

3 DIGITAL IN COAXIAL jack (11) (14)

Connect a digital coaxial cable to input digital signals from other components.

CORO

DII O

OIC

COI

O2O1

4 DIGITAL IN OPT connectors (11) (14)

Connect a digital optical cable to input digital signals from other components. There is no distinction of OPT1 and OPT2 connectors.

5 DIGITAL OUT COAXIAL jack (11)

Connect a digital coaxial cable to output digital signals to other components.

6 DIGITAL OUT OPTICAL connector (11)

Connect a digital optical cable to output digital signals to other components.

7 CONTROL A1ùïùï jacks (11) (44)

Setting the clock

Once you set the MD deck’s internal clock, the MD deck will automatically record the date and time of all recordings. For USA and Canadian models, date is displayed in the order of month, day, year, and time on a 12-hour clock. For European model, date is displayed in the order of day, month, year, and time on a 24-hour clock.

Note

The display windows below are of USA and Canadian models.

AMSMENU/NO YES

/ M m

While the deck is stopped, press MENU/NO twice.

“Setup Menu” appears in the display.

Tu rn AMS (or press ./ > repeatedly) until

“Clock Set ?” appears, then press AMS.

The month (or day) indication starts flashing.

Tu rn AMS (or press ./> repeatedly) to enter

the current day, then press AMS.

The month (or day) indication stops flashing, and the day (or month) indication starts flashing.

Changing the clock setting(s)

Do steps 1 and 2 above.

Press AMS or

you want to change flashes. T u rn AMS (or press ./> repeatedly) to ch ange

the setting, then press AMS. To complete the setting, press AMS or ./>

repeatedly until the minute indication flashes, then press AMS or YES.

Displaying the current date and time

You can display the current date and time any time while the power is on.

Press DATE PRESENT.

Each press of the button changes the display as follows:

Current display

Date

Time

For precise date and time stamping of recordings

Reset the time at least once a week.

Note

If the AC power cord is disconnected for a long time, the memorized clock settings will disappear and “Initialize” will flash in the display the next time you plug in and turn on the deck. If this happens, reset the clock.

Displaying the recorded date

You can then check the recorded date and time of a track.

/ repeatedly until the setting

Repeat step 3 to enter the month, day, year, hour,

and minute.

When you enter the minute, the set date and time appear again followed by "Complete!!", and the clock settings are completed.

Press ./> or number buttons to locate the

track you want to check. Press DATE RECORDED.

“No Date” appears if the internal clock has not been set or the track was recorded to another MD deck without a date and time stamp function.

SECTION 3

)

DISASSEMBLY

Note : Follow the disassembly procedure in the numerical order given.

3-1. CASE

Two screws

( TP,FLAT HEAD)

Remove the upper case

in the direction of the arrow

Two screws

(TP,FLAT HEAD

3-2. LOADING PANEL

Loading panel

Two screws

(M2.6)

Tray assembly

Two screws

(TP,FLAT HEAD)

Rotate the pulley gear

in the direction of the arrow and open the tray in the direction of the arrow

Bottom plate

Fourteen screws

3-3. FRONT PANEL ASSEMBLY

Two screws

( 3 × 8 )

Two bracket (F)

(CN651)

Connector

(CN303)

Flat type wire

(CN807)

Front panel assembly

3-4. MD MECHANISM DECK

Two screws

(BVTT3

Remove the MD mechanism deck in the direction of the arrow

Six screws

(3 × 8)

Four screws

Two lug

terminals

(BVTT 3

(CN102)

Two flat type wire

(CN102, 103)

(CN103)

Connector

(CN202)

3-5. TRAY ASSEMBLY

)

Two screws

(BV2.6)

Lug

Three gears

(top)

Bracket (top)

Two screws (BV2.6)

Lug

Shaft

Screw (BV2.6)

Three gears (top)

Stopper (shaft B

Remove the tray assembly

in the direction of the arrow

Rotate the pully gear in the direction

of the arrow

NOTE FOR INSTALLATION

Slider assembly

When the tray assembly is attached, move the slider assembly in the direction of the arrow B so that the pin is located in the position as shown above. Then attach the tray assembly.

and pull the tray assembly.

Slider assembly

When the gears (top) (two gears on the front) are attached, pull the tray assembly out in the direction of the arrow and slider (D) assembly as shown.

and align the rack (L)

Rack (L)

Gear (top)

Mark

Slider (D) assembly

Slider (D) assembl

Tray assembly

3-6. BU HOLDER ASSEMBLY

Two scews (BV2.6)

Two collars

(damper)

Two compression

springs

Two scews (BV2.6)

Two collars

(damper)

Two compression

springs

BU holder assembly

Fig. A

3-7. MOTOR (LOADING) ASSEMBLY (M10)

Motor (loading) assembly (M10)

Turn the pully gear to align the slider with of the rib. (Refer to Fig. A.)

Gear assembly

Two screws (BV2.6)

Slider Rib

Two screws

(B2

Belt (loading)

Connector (CN14)

3-8. BASE UNIT (MBU-5J)

)

Remove the holder assembly

in the direction of the arrow A.

Leaf spring (UDL)

Leaf spring (UDR

Base unit

3-9. BD BOARD

Two screws (BV2.6)

Two precision screws

(+P1.7

2.5)

Tapping screw

(M1.7)

Flexible board (CN104)

BD board

Two screws (BV2.6)

Claw

Remove the soldering

from the push switch.

Flexible board (CN101)

Remove the soldering of the lead wires from the spindle motor assembly.

3-10. OVER LIGHT HEAD (HR901)

Over light head

(HR901)

Screw (P1.7

Flexible boar (CN104)

3-11. MINI DISC DEVICE (KMS-260B/J1N)

Screw (B2

Flexible board (CN101)

Leaf spring (shaft)

Main shaft

Remove the mini disc device (KMS-260B/J1N)

in the direction of the arrow

Flexible board (CN104)

SECTION 4

TEST MODE

4-1. Precaution on Using the Test Mode

• Be sure to insert and eject a disc after confirming that the disc in the MDS-JA333ES has come to complete stop because the loading related movements of the mechanism are performed without any relationship with the test mode. Disc does not stop rotating even through the A button is pressed while disc is rotating in the modes such as continuous playback and continuous recording. Therefore, the disc is ejected while it is rotating. Be sure to press the MENU/NO button, then press the A button after a disc has completely stopped of its rotation.

4-1-1. Modes in Which Recording Laser Emits the Light and the Button Operations

• Continuos recording mode (CREC 1MODE)

• Laser power check mode (LDPWR CHECK)

• Laser power adjustment mode (LDPWR ADJUS)

• IOP check (IOP compare) (Not used with the MDM-6J and MBU-5J)

• IOP value non-volatile writing (IOP NV Save) (Not used with the MDM-6J and MBU-5J)

• Traverse (MO) check (EF MO CHECK)

• Traverse (MO) check (EF MO ADJUS)

• When the zREC button is pressed

4-2. How to Enter the Test Mode

There are two methods to enter the test mode as follows. Method 1: Connect the power plug to the outlet while pressing the lAMSL knob and x button at the same time, and remove the

lAMSL knob and x button at the same time.

When the unit enters the test mode, “[Check]” appears. The three groups can be switched, ......↔ [Check] ↔ [Service] ↔

[Develop] ↔..... , by rotating the lAMSL knob.

The Develop group is not used for service. If you enter the group mistakenly, immediately press the MENU/NO button and exit the mode.

Method 2: Connect the power plug to the outlet while pressing the lAMSL knob, and remove the lAMSL knob.

When the unit enters the test mode, “TEMP CHECK” (C12) appears. When the test mode is entered using this method, the contents of check group at method 1 can be performed.

4-3. Exiting the Test Mode

Press the REPEAT button. The MDS-JA333ES enters the standby status and exits the test mode.

4-4. Basic Operation of the Test Mode

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

Function name Function MENU/NO button Chancels or moves to the upper hierarchy YES button Decision

lAMSL knob (right/left) Selection lAMSL knob (pushed) Decides the sub-menu

4-5. Selecting the Test Mode

There are 26 types of the test mode. The group can be switched by rotating the lAMSL knob. All the adjustments and checks for service can be performed in the test mode of the service group. There is the Develop group, but it is not used for service. If you enter the group mistakenly, immediately press the MENU/NO button and exit the 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 Scurve CHECK VERIFYMODE DETRK CHECK 0920 CHECK Iop Read Iop Compare ADJ CLEAR INFOMATION CPLAY1MODE CREC 1MODE

No.

C01

Automatic self-diagnosis

C02

Error history display, clear

C03

Temperature compensation offset adjustment

C04

Laser power adjustment

C05

IP data writing Reads the current IOP value with microprocessor and writes it to non-

C06

volatile data

C07

Trav erse (MO) adjustment

C08

Traverse (CD) adjustment

C09

Focus bias check

C10

Focus /tracking gain adjustment (MO)

C11

Focus /tracking gain adjustment (CD)

C12

Temperature compensation offset check

C13

Laser power check

C14

Trav erse (MO) check

C15

Trav erse (CD) check

C16

Focus bias adjustment

C17

S curve check

C18

Non-volatile memory check

C19

Detract check

C25

Outermost circumference check

C26

IOP data display

C27

Comparison to the initial IOP value written in non-volatile data

C28

Initialization of non-volatile memory of adjustment value

C31

Display of microprocessor version, etc.

C34

Continuous playback mode

C35

Continuous recording mode

Contents

Mark

× × × ×

Group

Chck Service

® ® ® ® ®

® ® ® ®

® ®® ®® ®® ®® ®® ® ® ® ® ®® ®®

® ®® ®® ®®

• For detailed description of each adjustment mode, refer to Section 5 “Electrical Adjustments”. For “Err Display” (C02), refer to the self-diagnosis function of page 4.

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

• The items marked × in the mark are not used in servicing, therefore they are not detailed. If select these modes accidentally, press the MENU/NO button immediately to exit from it. Be careful especially when using the test mode of the Dev elop group. The machine may not run correctly.

• AUTO CHECK, Iop NV Save and Iop Compare cannot be used with the MDM-6J and MBU-5J.

4-5-1. Operating the Continuos Playback Mode

1. Entering the continues playback mode

1)Load the disc into the unit. (recordable disc or disc for playback) The disc is loaded by pushing the tray.

2)Rotate the lAMSL knob to display “CPLAY1MODE” (C34).

3)Press the YES button to change the display to “CPLAY1MID”.

4)When access completes, the display changes the display to “C = AD = ”.

Note : The value of the “ ” displayed on the screen indicates error rate and “ADER”.

2. Changing the parts to be played back

1)Press the YES button during continuos playback to change the display as shown and move the played back part.

"CPLAY1MID" → "CPLAY1OUT" → "CPLAY1IN"

2)When access completes, the display changes to “C = AD = ”.

Note : The value of the “ ” displayed on the screen indicates error rate and “ADER”.

3. Ending the continuos playback mode

1) Press the MENU/NO button to change the display to “CPLAY1MODE” (C34).

2) Press the A button to eject the disc.

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

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

4-5-2. Operating the Continuos Recording Mode (Use this mode for self record/playback check only)

1. Entering the continuos recording mode

1)Load the recordable disc to the unit. The disc is loaded by pushing the tray.

2)Rotate the lAMSL knob to display “CREC 1MODE” (C35).

3)Press the YES button to change the display to “CREC1MID”.

4)When access completes, the display changes the display to “CREC1( ” and illuminates.

Note : The value of the “ ” displayed on the screen indicates the address of the recorded position.

2. Changing the parts to be recorded

1) Press the YES button during continuos playback to change the display as shown and move the played back part. disappear s during moving.

"CREC1MID" → "CREC1OUT" → "CREC1IN"

REC

2)When access completes, the display changes to “CREC1( ” and disappears.

Note : The value of the “ ” displayed on the screen indicates the address of the recorded position.

3. Ending the continuos recording mode

1) Press the MENU/NO button. The display changes to “CREC 1MODE” (C35) and disappears.

2) To eject the disc, press the A button.

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

N : 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 continuos recording for long periods of time above 5 minutes. Note 4: During continuos recording, be careful not to apply vibration.

4-5-3. No-Volatile Memory Mode (EEP MODE)

This mode reads and writes the contents of the non-volatile memory. It is not used in servicing. If selecting this mode accidentally, press the MENU/NO button immediately to exit it.

REC

4-6. Functions of Other Buttons

Function name Main contents N Sets continuos playback when pressed in the STOP state. When pressed during continuos playback, the

tracking servo turns ON/OFF.

x Stops continuos playback and continuous recording M The sled moves to the outer circumference only when this is pressed m The sled moves to the inner circumstance only when this is pressed

REC MODE (other models/SF EDIT/SCROLL) PLAY MODE Switches the spindle servo mode (CLV S ↔ CLV A) DISPLAY/CHAR Switches the display when pressed A/OPEN/CLOSE Removes the disc REPEAT/POWER Exits test mode

Switches between the pit and groove modes when pressed

4-7. Test Mode Displays

The DISPLAY key is used to switch display modes. The display modes are switched in the following order each time the DISPLAY key is pressed.

Order Description Example of display

1 MODE display CPLAY1 ( 2 Error rate display C= AD= 3 Address display h s 4 Auto gain display AG= / [ ] 5 Detrack display ADR= # 0000 6 IVR display [ ] [ ] [ ] 7 Displays C1 error and JITTER J C 8 Displays AD error and JITTER J AD=

When CPLAY or CREC starts, the display is forced to switch to 2 as initial mode. Supplementary explanation of each display

1. MODE display “TEMP ADJUS” (C03), “CPLAY1MODE” (C34), etc. are displayed.

2. Error rate display Error rates are displayed as follows.

C= AD= C= means the C1 error and AD= means ADER.

3. Address display Addresses are displayed as follows.

h= h= h= means the header address, s= means the SUBQ address and a= means the ADIP address.

* When the address cannot be read, “-” is displayed.

Displays other than the above ones are not used for service.

s= (pit block of recordable disc and disc for playback only) a= (groove of recordable disc)

4-8. Meaning of Other Displays

Display

H X z REC

SYNC (other models/TOC EDIT) L. SYNC (other models/A.SPACE) OVER B/1 (REP portion) A-/REP TRACK/(LP)4/calender frame DISC/LP2 SLEEP/SHUF MONO PROGRAM

MODE display Off

Servo ON Servo OFF Tracking servo OFF Tracking servo ON Recording mode OFF Recording mode OFF CLV low speed mode CLV normal mode ABCD adjustment completed Tracking offset cancel ON Tracking offset cancel OFF Tracking auto gain OK Focus auto gain OK Pit Groove High reflection Low reflection CLV-S CLV-A CLV LOCK CLV UNLOCK EF BAL change

Contents

4-9. Information

Displays the version of software.

[Operation procedure]

1. Press the YES button while “INFORMATION” is displayed.

2. The version of the software will be displayed.

3. End this mode with the MENU/NO button.

4-10. Countermeasure when MEMORY NG Appears

If there is an abnormality in non-volatile memory data, “E001” / “MEMORY NG” appears so that the MO deck is not operated. If this happens, immediately enter the test mode and do the following.

[Operation procedure]

1. Enter the test mode. (Refer to Section 4-2.)

2. The display for selecting the test mode normally appears. Howe ver, if there is an abnormality in non-volatile memory data, the follo wing characters appears: “INIT EEP?”

3. Press the x button and A button at the same time.

4. Rotate the lAMSL knob to select “MBU-5J”.

5. Press the lAMSL knob. If the non-volatile memory data succeeds in being rewriting, the mode returns to the norma test mode and the display for selecting modes appears.

SECTION 5

ELECTRICAL ADJUSTMENTS

5-1. On Part Replacement and Adjustment

• Perform the checks and adjustments of the MDM and MBU blocks following the procedure below . The procedure is changed depending on the replaced part.

Start

• Abbreviation OP : Optical pick-up

•

Temperature compensation

offset check

•

Laser power check

•

Traverse check

•

Focus bias check

•

C PLAY check

•

Self record/playback check

OWH : Overwrite head

Part Replacement and repairing

OWH is replaced ?

Either OP, IC171, IC101, or

IC121 is replaced ?

YES

Initial setting of adjustment value

OP or IC171 is replaced ?

YES

Recording the IOP information

(IOP value that is recorded in OP)

The error occurs by other cause. Perform the mechanism check of the sled and spindle system, etc.

YES

Either IC171 or D101 is replaced ?

YES

Temperature compensation offset adjustment

• T ra verse adjustment

• Focus bias adjustment

• Error rate adjustment

• Auto gain adjustment

End adjustment

5-2. Precautions for Checking Laser Diode

Emission

T o check the emission of the laser diode during adjustments, ne v er view directly from the top as this may lose your eye-sight.

5-3. Precautions for Use of Optical Pick-up

(KMS-260B)

As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap on the flexible board of the optical pick-up when using it. Before disconnecting the connector, disorder the laser tap. Be careful not to remove the solder before connecting the connector . Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.

Pick-up

Laser tap

Optical pick-up flexible board

Flexible board

5-4. Precautions for Adjustments

1) When replacing the following parts, perform the adjustments and checks with !! in the order shown in the following table.

2) Set the test mode when performing the adjustments. After completing the adjustments, exit the test mode. Perform the adjustments and checks in “Group S” of the test mode.

3) Perform the necessary adjustments only in the order given.

4) Use the following tools and measuring devices.

• Check disc (MD) TDYS-1 (Parts No.: 4-963-646-01)

• Test disc (MDW-74/GA-1) (Parts No.: 4-229-747-01)

• Laser power meter LPM-8001 (Parts No.: J-2501-046-A) Or

• MD laser power meter 8010S (Parts No.: J-2501-145-A)

(Note)

• Oscilloscope (Measure after perform the CAL of the probe.)

• Digital voltmeter

• Thermometer

• T ool for checking waveform of BD board (Parts No.: J-2501-

149-A)

5) When observing several signals on the oscilloscope, etc., make sure that VC and ground do not connect inside the oscilloscope. (VC and ground will become short-circuited.)

6 When checking the waveform, the check can be performed

without soldering by using the tool for checking waveform of BD board. (Refer to the Service note (page 7).)

7) Use the tool disc that is free from finger print and dust as they can affect result of adjustment.

Note: Laser power meter When the laser power check and adjustment of the electrical adjustment are performed, using the new MD laser power meter 8010S (J-2501-145-A) instead of the former laser power meter is recommended. The procedure of installing the laser meter sensor to the objective lens of pick-up is greatly simplified.

1. Initial setting of adjustment value

2. Recording IOP information (the value that is written in pick-up)

3. Temperature compensation offset adjustment

4. Laser power adjustment

5. Traverse adjustment

Focus bias adjustment

Error rate adjustment

8. Auto gain output level adjustment

Optical pick-up

a a a

IC171

a a a

BD board

IC101,

D101

IC121

× ×

IC192

5-5. Creating Continuos Recorded Disc

• This disc is used in focus bias adjustment and error rate check. The following describes how to create a continuos recording disc.

1. Load a disc (blank disc) commercially available.

the disc is loaded by pushing the tray.

2. Rotate the lAMSL knob and display “CREC 1MODE”

(C35).

3. Press the YES button to display “CMEC 1MID”.

“CREC1 (0300)” is displayed for a moment and recording starts.

4. Complete recording within 5 minutes.

5. Press the MENU/NO button to stop recording.

6. Press the A button to eject the disc.

The above has been how to create a continuos recording data for the focus bias adjustment and error rate check.

Note:

• Be careful not to apply vibration during continuos recording.

5-6. Check before Repairing

This check aims at locating the approximate position of cause of trouble before starting to replace parts using specifications. For detailed information, refer to [Checks before Part Replacement and Adjustment] of Service note.

5-6-1. Temperature Compensation Offset Check

Before adjustment, set the internal temperature and the ambient temperature are between 22 and 28 °C. Checking procedure:

1. Rotate the lAMSL knob to display “TEMP CHECK”

(C12).

2. Press the YES button.

3. It is OK when “T=@@(##)[OK” appears. It is NG when

“T=@@(##)[NG” appears. (@@ is the current value. ## is the value that is written in the non-volatile memory.)

5-6-2. Laser Power Check

Before check:

• Refer to Section 1 “Service note” How to open the disc tray when power switch is turned off, and laser power check.

• Check the IOP value of optical pick-up. (Refer to Section 5-8 “Recording and displaying the IOP information”.)

Connection:

Laser power meter

Optical pick-up

objective lens

Digital voltmeter

BD board

CN110 5-pin (I+3V) CN110 4-pin (IOP)

Checking procedure:

1. Insert the laser power meter from the disc inlet and set it on the

objective lens of the optical pick-up. (When it cannot be set properly, press the m button and M button to move the optical pick-up.) Connect the digital voltmeter to CN110 5-pin (I+3V) and the CN110 4-pin (IOP).

2. Rotate the lAMSL knob to display “LDPWR CHECK”

(C13).

3. Press the YES button once to display “LD 0.9mW $ ”.

Confirm that the reading of the laser power meter is 0.84 to

0.92 mW.

4. Press th

e YES button once again to display “LD 7.0mW $ ”. Confirm that the readings of the laser power meter and digital bolt meter satisfy the specified value.

5. Then press th

e YES button once again to display “LD

6.2mW $ ”.

Specification: Laser power meter reading: 7.0 ± 0.2 mW Digital bolt meter reading: Optical pick-up displayed value ± 10 %

(Optical pick-up label)

KMS

260B

24391

H0528

IOP = 52.8 mA in this case IOP (mA) = digital bolt meter reading (mV)/1 (W)

(For the checking procedure of this value, refer to Section 5-8 “Recording and displaying the IOP information”.)

6. Press the MENU/NO button to display “LDPWR CHECK” (C13) and stop laser emission. (The MENU/NO button is effective at all times to stop the laser emission.)

Note 1 : After step 4, the display of “LD 0.7mW$ ” “LD

6.2mW$ ”, “LD Wp $ ” is switched every time when pressing the YES button. Operation is not necessary for these displays.

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