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MiniDisc Digital Audio System
Service Manual
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MDS-JB930
SERVICE MANUAL
US Model Canadian Model AEP Model UK Model
Photo: Black model
U.S. and foreign patents licensed form Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism MD Mechanism Type BU Base Unit Type Optical Pick-up Type
MDS-JE520 MDM-5D MBU-5D KMS-260B/J1N
SPECIFICATIONS
MINIDISC DECK
MICROFILM
SELF-DIAGNOSIS FUNCTION
The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes which show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box in the instruction manual. For details on how to check error codes during servicing, refer to the following "Procedure for using the Self-Diagnosis Function (Error History Display Mode)".
PROCEDURE FOR USING THE SELF-DIAGNOSIS FUNCTION (ERROR HISTORY DISPLAY MODE)
Note: Perform the self-diagnosis function in the "error history display mode" in the test mode. The following describes the least required procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the MENU/NO button to exit the mode. ± ± 1. While pressing the [ AMS ] knob and [ ] button, connect the power plug to the outlet, and release the [ AMS ] knob p and [ ] button. p ± 2. Turn the [ AMS ] knob and when "[Service]" is displayed, press the [YES] button. ± 3. Turn the [ AMS ] knob to display "ERR DP MODE". 4. Press the [YES] button to sets the error history mode and displays "total rec". ± 5. Select the contents to be displayed or executed using the [ AMS ] knob. ± 6. Press the [ AMS ] knob to display or execute the contents selected. ± 7. Press the [ AMS ] knob another time returns to step 4. 8. Press the [MENU/NO] button to display "ERROR DP MODE" and release the error history mode. 9. To release the test mode, press the [FILTER] button. The unit sets into the STANDBY state, the disc is ejected, and the test mode ends.
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ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS
Selecting the Test Mode Display total rec Details of History Displays the recording time. Displayed as "rh". The displayed time is the total time the laser is set to the high power state. This is about 1/4 of the actual recording time. The time is displayed in decimal digits from 0h to 65535h. Displays the play time. Displayed as "ph". The time displayed is the total actual play time. Pauses are not counted. The time is displayed in decimal digits from 0h to 65535h. Displays the total number of retries during recording and number of retry errors during play. Displayed as "r p". "r" indicates the retries during recording while "p" indicates the retry errors during play. The number of retries and retry errors are displayed in hexadecimal digits from 00 to FF. Displays the total number of errors. Displayed as "total ". The number of errors is displayed in hexadecimal digits from 00 to FF. Displays the 10 latest errors. Displayed as "0 E@@". indicates the history number. The smaller the number, the more recent is the error. (00 is the latest). @@ indicates the error code. ± Refer to the following table for the details. The error history can be switched by turning the [ AMS ] knob. Mode which erases the "retry err", "total err", and "err history" histories. When returning the unit to the customer after completing repairs, perform this to erase the past error history. ± After pressing the [ AMS ] button and "er refresh?" is displayed, press the [YES] button to erase the history. "Complete!" will be displayed momentarily. Be sure to check the following when this mode has been executed. · The data has been erased. · The mechanism operates normally when recording and play are performed. Mode which erases the "total rec" and "total play" histories. These histories serve as approximate indications of when to replace the optical pick-up. If the optical pickup has been replaced, perform this operation and erase the history. ± After pressing the [ AMS ] button and "tm refresh?" is displayed, press the [YES] button to erase the history. "Complete!" will be displayed momentarily. Be sure to check the following when this mode has been executed. · The data has been erased. · The mechanism operates normally when recording and play are performed.
total play
retry err
total err
err history
er refresh
tm refresh
Table of Error Codes Error Code E00 E01 Details of Error No error Disc error. PTOC cannot be read (DISC ejected) E02 Disc error. UTOC error (DISC not ejected) E03 E04 Loading error Address cannot be read (Servo has deviated) E0A Error Code E05 E06 E07 E08 E09 Details of Error FOK has deviated Cannot focus (Servo has deviated) Recording retry Recording retry error Playback retry error (Access error) Playback retry error (C2 error)
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SECTION 1 SERVICING NOTES
TABLE OF CONTENTS SELF-DIAGNOSIS FUNCTION .................................... 2 1. 2. 3. 4. 5. 6. SERVICING NOTES ............................................... 4 GENERAL ................................................................... 11 DISASSEMBLY ......................................................... 13 TEST MODE .............................................................. 17 ELECTRICAL ADJUSTMENTS ......................... 22 DIAGRAMS
SAFETY CHECK-OUT After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, "metallized" knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes.). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers' instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The "limit" indication is 0.75 V, so analog meters must have an accurate lowvoltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A)
To Exposed Metal Parts on Set
6-1. Block Diagram SERVO Section .............................. 31 6-2. Block Diagram MAIN Section ................................ 32 6-3. Note for Printed Wiring Boards and Schematic Diagrams ....................................................... 33 6-4. Printed Wiring Board BD Board ............................. 35 6-5. Schematic Diagram BD Board (1/2) ....................... 36 6-6. Schematic Diagram BD Board (2/2) ....................... 37 6-7. Schematic Diagram SW Board ................................ 38 6-8. Printed Wiring Board SW Board ............................. 38 6-9. Schematic Diagram MAIN (1/3) /BAT Boards ....... 39 6-10. Schematic Diagram MAIN Board (2/3) .................. 40 6-11. Schematic Diagram MAIN Board (3/3) .................. 41 6-12. Printed Wiring Board MAIN Board (Side A) ......... 42 6-13. Printed Wiring Boards MAIN Board (Side B), BAT Board .......................... 43 6-14. Printed Wiring Board AC Board ............................. 44 6-15. Schematic Diagram AC Board ................................ 45 6-16. Printed Wiring Boards PANEL Section .................. 46 6-17. Schematic Diagram PANEL Section ....................... 47 6-18. IC Pin Function Description ........................................... 54
0.15 µF
1.5 k
AC voltmeter (0.75 V)
7. 8.
EXPLODED VIEWS ................................................ 61
Earth Ground
ELECTRICAL PARTS LIST ............................... 65
Fig. A. Using an AC voltmeter to check AC leakage.
MODEL IDENTIFICATION
-- BACK PANEL -- Part No.
Model AEP, UK models US model Canadian model
Part No. 4-998-603-6 4-998-603-7 4-998-603-8
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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.
Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. This caution label is located inside the unit.
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. VAROITUS Paristo voi räjähtää, jos se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. Flexible Circuit Board Repairing · Keep the temperature of the soldering iron around 270 °C during repairing. · Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). · Be careful not to apply force on the conductor when soldering or unsoldering. Notes on chip component replacement · Never reuse a disconnected chip component. · Notice that the minus side of a tantalum capacitor may be damaged by heat.
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 The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.
SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ! LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
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JIG FOR CHECKING BD BOARD WAVEFORM
The special jig (J-2501-149-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) TEO : TRK error signal (Traverse adjustment) VC : Reference level for checking the signal RF : RF signal (Check jitter)
Mechanism deck
CN110 6P connector
5P Connector
RF
VC TEO IOP I+3V GND
RF VC TEO IOP I+3V GND
1 RF VC for TEO MDM-3 IOP 5 I+3V 1 VC RF TEO for IOP MDM-5 I+3V 6 GND
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IOP DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC171 OF BD BOARD) ARE REPLACED
The IOP value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to look at the value on the optical pick-up label. When replacing the optical pick-up or non-volatile memory (IC171 of BD board), record the IOP value on the optical pick-up according to the following procedure. Record Procedure: ± ± 1. While pressing the [ AMS ] knob and [ ] button, connect the power plug to the outlet, and release the [ AMS ] knob p and [ ] button. p 2. Turn the [ AMS ] knob to display "[Service]", and press the [YES] button. ± ± 3. Turn the [ AMS ] knob to display "lop Write" (C28), 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 label. ± To select the number : Turn the [ AMS ] knob. ± To select the digit : Press the [ AMS ] 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 [FILTER] button to complete. Display Procedure: ± ± 1. While pressing the [ AMS ] knob and [ ] button, connect the power plug to the outlet, and release the [ AMS ] knob p and [ ] button. p ± 2. Turn the [ AMS ] knob to display "[Service]", and press the [YES] button. ± 3. Turn the [ AMS ] knob to display "lop Read" (C27). 4. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ : indicates the IOP value on the optical pick-up label. ##.# : indicates the IOP value after adjustment ± 5. To end, press the [ AMS ] knob or [MENU/NO] button to display "Iop Read". Then press the [FILTER] button.
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 : Disconnect the power plug, short-circuit jumper wire of JW705 and JW706 (RESET). BAT BOARD (Component Side)
JW706 JW705
CN703
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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". Criteria for Determination (Unsatisfactory if specified value is not satisfied) Laser power check (6-2 : See page 24) · 0.9 mW power Specified value : 0.84 to 0.92 mW · 7.0 mW power Specified value : 6.8 to 7.2 mW lop (at 7mW) · Labeled on the optical pickup Iop value ± 10mA Traverse check (6-3 : See page 24) Focus bias check (6-4 : See page 25) · Traverse waveform Specified value : Below 10% offset · Error rate check Specified value : For points a, b, and c C1 error : About 200 AD error : Above 00 · Error rate check Specified value: a. When using test disc (MDW-74/AU-1) C1 error : Below 80 AD error : Below 2 b. When using check disc (TDYS-1) C1 error : Below 50 · CPLAY error rate check Specified value: C1 error : Below 80 AD error : Below 2 Measure if unsatisfactory: · Clean the optical pick-up · Adjust again · Replace the optical pick-up · Replace the optical pick-up
· Replace the optical pick-up · Replace the optical pick-up
C PLAY check (6-5 : See page 25)
· Replace the optical pick-up
Self-recording/playback check (6-6 : See page 25)
If always unsatisfactory: · Replace the overwrite head · Check for disconnection of the circuits around the overwrite head If occasionally unsatisfactory: · Check if the overwrite head is distorted · Check the mechanism around the sled
Temperature compensation offset check (6-1 : See page 24)
· Unsatisfactory if displayed as T=@@ (##) [NG" NG (@@, ## are both arbitrary numbers)
· Check for disconnection of the circuits around D101 (BD board) · Check the signals around IC101, IC121, CN102, CN103 (BD board)
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.
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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. Load a recordable disc whose contents can be erased into the unit. ± 2. Press the [MENU/NO] button. When "Edit Menu" is displayed on the fluorescent indicator tube, turn the [ AMS ] knob to display "All Erase?". ± 3. Press the [YES] button. (Or press the [ AMS ] knob) 4. When "All Erase??" is displayed on the fluorescent indicator tube, the music calendar number blinks. p 5. Press the [YES]button to display "Complete!!", and press the [ ] button immediately. Wait for about 15 seconds while pressing the ± button. (The [ AMS ] knob can be pressed instead of the [YES]button for the same results.) 6. When the "TOC" displayed on the fluorescent display tube goes off, release the [ ] button. p r 7. Press the [REC ] button to start recording. Then press the [ ] button and start recording. P 8. To check the "track mode", press the [ ] button to start play. · 9. To release the test mode, press the [ ] button, and turn OFF the power. When "TOC" disappears, disconnect the power plug from the 1/u outlet.
Fig. 1 Reading the Test Mode Display (During recording and stop)
RTs@@c##e** Fluorescent indicator tube display @@ : Cause of retry ## : Number of retries ** : Number of retry errors
Fig. 2 Reading the Test Mode Display (During playback)
@@ ###** $$ Fluorescent indicator tube display @@ : ## : ** : $$ : Parts No. (name of area named on TOC) Cluster Sector Address Track mode (Track information such as copyright information of each part)
Reading the Retry Cause Display Hexa1 decimal b7 b6 b5 b4 b3 b2 b1 b0 4 0 0 0 0 0 0 1 0 2 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 8 0 0 0 1 0 0 0 0 4 0 0 1 0 0 0 0 0 2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 01 02 04 08 10 20 40 80 Higher Bits Lower Bits Cause of Retry shock ader5 Occurring conditions When track jump (shock) is detected When ADER was counted more than five times continuously
Hexadecimal 8 Bit Binary
Discontinuous address When ADIP address is not continuous When DIN unlock is detected DIN unlock FCS incorrect IVR rec error CLV unlock Access fault 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 n b6 Lower bit : 2 = 0010 n b1 In this case, the retry cause is combined of "CLV unlock" and "ader5". When A2 is displayed: Higher bit: A = 1010 n b7+b5 Lower bit : 2 = 0010 n b1 The retry cause in this case is combined of "access fault", "IVR rec error", and "ader5".
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Reading the Retry Cause Display HexaHexadecimal 8 4 2 1 8 4 2 1 decimal Bit b7 b6 b5 b4 b3 b2 b1 b0 Binary 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 01 02 04 08 10 20 40 80 Monaural This is 2-bit display. Normally 01. 01:Normal audio. Others:Invalid Audio (Normal) Original Copyright Write prohibited Invalid Digital copy No copyright Write allowed Higher Bits Lower Bits Details When 0 Emphasis OFF Stereo When 1 Emphasis ON
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 n b7 Lower bit : 4 = 0100 n b2 In this case, as b2 and b7 are 1 and others are 0, it can be determined that the retry cause is combined of "emphasis OFF", "monaural", "original", "copyright exists", and "write allowed". Example When 07 is displayed: Higher bit : 0 = 1000 n All 0 Lower bit : 7 = 0111 n 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 n Binary Conversion Table
Hexadecimal 0 1 2 3 4 5 6 7 Binary 0000 0001 0010 0011 0100 0101 0110 0111 Hexadecimal 8 9 A B C D E F Binary 1000 1001 1010 1011 1100 1101 1110 1111
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SECTION 2 GENERAL
This section is extracted from instruction manual.
11
12
SECTION 3 DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
CASE (4095269)
1 four screws (CASE 3 TP2) 2 case (4095269) 1 three screws (CASE 3 TP2)
FRONT PANEL SECTION
1 connector (CN790) 4 claw 1 connector (CN700) 2 wire (flat type) (21 core) (MAIN-DISP) (CN800)
4 claw
3 five screws (BVTP3 × 8)
1 connector (CN801) 5 front panel section
13
MAIN BOARD
1 connector (CN700) 3 two screws (BVTP2.6 × 8) 2 wire (flat type) (21 core) (MAIN-BD) (CN402) 2 wire (flat type) (21 core) (MAIN-DISP) (CN800) 1 connector (CN200) 3 three screws (BVTP2.6 × 8)
2 wire (flat type) (23 core) (CN400)
1 connector (CN801)
3 seven screws (BVTP3 × 8)
4 MAIN board
MECHANISM DECK (MDM-5D)
4 four step screws (BVTTWH M3) 2 connector (CN401) 5 Remove the mechanism deck (MDM-5D) to direction of the arrow. 3 wire (flat type) (21 core) (MAIN-BD) (CN402) 3 wire (flat type) (23 core) (CN400)
1 harness
14
SLIDER (CAM)
7 slider (Cam)
· Note for Installation of Slider A (Cam)
4 bracket (Guide L)
Set the shaft of Cam gear to be at the position in the figure.
1 two screws (P2.6x6)
2 harness
Set the shaft of Lever (O/C) to be at the position in the figure.
3 leaf spring 5 two screws (P2.6x6)
6 bracket (Guide R)
BASE UNIT (MBU-5D), BD BOARD
2 base unit (MBU-5D) 5 flexible board (CN104)
6 flexible board (CN101) 1 three screws (P2.6 × 6)
7 BD board 4 screw (M1.7 × 4)
3 Remove the solder (Seven portion).
15
SW BOARD, LOADING MOTOR (M103)
1 screw (PTPWH M2.6 × 6) 2 gear B 3 two screws (PWH1.7 × 4)
4 loading motor (M103) 6 SW board
5 three screws (BTP2.6 × 6)
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SECTION 4 TEST MODE
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 [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 [EJECT ] button after pressing the [MENU/NO] button and the rotation of disc is stopped. § 1-1. Recording laser emission mode and operating buttons · Continuous recording mode (CREC MODE) · Laser power check mode (LDPWR CHECK) · Laser power adjustment mode (LDPWR ADJUS) · Traverse (MO) check (EF MO CHECK) · Traverse (MO) adjustment (EF MO ADJUS) · When pressing the [REC ] button. r
2. SETTING THE TEST MODE
The following are two methods of entering the test mode. ± ± Procedure 1: While pressing the [ AMS ] knob and [ ] button, connect the power plug to an outlet, and release the [ AMS ] p knob and [ ] button. p ± When the test mode is set, "[Check]" will be displayed. Turn the [ AMS ] knob switches between the following four groups; ···N [Check] N [Adjust] N [Service] N [Develop] N ···. n n n n n ± Procedure 2: While pressing the [ AMS ] knob, connect the power plug to the outlet and release the [ AMS ] 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.
3. RELEASING THE TEST MODE Press the [FILTER] button. The disc is ejected when loaded, and "Standby" display blinks, becomes STANDBY state. 4. BASIC OPERATIONS OF THE TEST MODE ± All operations are performed using the [ AMS ] knob, [YES] button, and [MENU/NO] button.
The functions of these buttons are as follows.
Function name
AMS ± knob
Function Changes parameters and modes Proceeds onto the next step. Finalizes input. Returns to previous step. Stops operations.
YES button MENU/NO button
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5. SELECTING THE TEST MODE
± There are 31 types of test modes as shown below. The groups can be switched by turning the [ AMS ] knob. After selecting the ± group to be used, press the [YES] button. After setting a certain group, turn the [ AMS ] knob switches between these modes. Refer to "Group" in the table for details can be selected. All items used for servicing can be treated using group S. So be carefully not to enter other groups by mistake. Display TEMP CHECK LDPWR CHECK EF MO CHECK EF CD CHECK FBIAS CHECK Scurve CHECK VERIFYMODE DETRK CHECK TEMP ADJUS LDPWR ADJUS EF MO ADJUS EF CD ADJUS FBIAS ADJUS EEP MODE MANUAL CMD SVDATA READ ERR DP MODE SLED MOVE ACCESS MODE 0920 CHECK HEAD ADJUST CPLAY 2MODE CREC 2MODE ADJ CLEAR AG Set (MO) AG Set (CD) Iop Read Iop Write 930 ****** CPLAY MODE CREC MODE No. C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 Laser power check Traverse (MO) check Traverse (CD) check Focus bias check S letter check Non-volatile memory check Detrack check Temperature compensation offset adjustment Laser power adjustment Traverse (MO) adjustment Traverse (CD) adjustment Focus bias adjustment Non-volatile memory control Command transmission Status display Error history display, clear Sled check Access check Outermost circumference check Head position check Same functions as CPLAY MODE Same functions as CREC MODE Initialization of non-volatile memory of adjustment value Auto gain output level adjustment (MO) Auto gain output level adjustment (CD) IOP data display IOP data write Microprocessing version display Continuous playback mode Continuous recording mode C C C A A C A (X) (X) (X) (X) (X) (X) A A A S S S S S S S S D D (X) (!) (X) (X) S D D D D D D (X) (X) (X) Contents Temperature compensation offset check Mark C C C C C C C C A A A A A S S S S S D D D Group (*) S S S S S
Group (*) C: Check S: Service
A: Adjust D: Develop
· For details of each adjustment mode, refer to "5. Electrical Adjustments". For details of "ERR DP MODE", refer to "Self-Diagnosis Function" on page 2. · If a different mode has been selected by mistake, press the [MENU/NO] button to release 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 release the mode immediately. Be especially careful not to set the modes with (!) as they will overwrite the non-volatile memory and reset it, and as a result, the unit will not operate normally.
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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) Turn the [ AMS ] knob and display "CPLAY MODE" (C30). (3) Press the [YES] button to change the display to "CPLAY 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. "CPLAY MID" n "CPLAY OUT" n "CPLAY IN" When pressed another time, the parts to be played back can be moved. When access completes, the display changes to "C = AD = ".
Note: The numbers " " displayed show you error rates and ADER.
(2)
3. Ending the continuous playback mode (1) Press the [MENU/NO] button. The display will change to "CPLAY MODE". (2) Press the [EJECT ] button and take out the disc. §
Note: The playback start addresses for IN, MID, and OUT are as follows.
IN MID OUT
40h cluster 300h cluster 700h cluster
5-2. Operating the Continuous Recording Mode (Use only when performing self-recording/palyback check.) 1. Entering the continuous recording mode (1) Set a recordable disc in the unit. ± (2) Turn the [ AMS ] knob and display "CREC MODE". (3) Press the [YES] button to change the display to "CREC MID" (C31). " and " REC " lights up. (4) When access completes, the display changes to "CREC (
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. "CREC MID" n "CREC OUT" n "CREC IN" When pressed another time, the parts to be recorded can be changed. " REC " goes off. " and " REC " lights up. When access completes, the display changes to "CREC (
Note: The numbers " " displayed shows you the recording position addresses.
(2)
3. Ending the continuous recording mode (1) Press the [MENU/NO] button. The display changes to "CREC MODE" and " REC " goes off. (2) Press the [EJECT ] button and take out the disc. §
Note 1: The recording start addresses for IN, MID, and OUT are as follows.
40h cluster 300h cluster 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.
IN MID OUT
5-3. Non-Volatile Memory Mode (EEP MODE) This mode reads and writes the contents of the non-volatile memory. It is not used in servicing. If the unit entered this mode accidentally, press the [MENU/NO] button immediately to release it.
19
6. FUNCTIONS OF OTHER BUTTONS
Function · p ) 0 SCROLL PLAY MODE DISPLAY/CHAR EJECT § FILTER Contents 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 ~ CLV-A). Switches the displayed contents each time the button is pressed Ejects the disc Releases the test mode
7. TEST MODE DISPLAYS Each time the [DISPLAY/CHAR] button is pressed, the display changes in the following order.
1. Mode display Displays "TEMP ADJUS", "CPLAYMODE", etc.
Mode display
2. Error rate display Displays the error rate in the following way. C = AD = C = Indicates the C1 error. AD = Indicates ADER. 3. Address display The address is displayed as follows. (MO: recordable disc, CD: playback only disc) Press the [SCROLL] button to switches between the groove display and pit display. 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 servo is not imposed.
Error rate display Address display Auto gain display (Not used in servicing) Detrack check display (Not used in servicing) IVR display (Not used in servicing)
4. Auto gain display (Not used in servicing) The auto gain is displayed as follows. AG = /[ 5. Detrack check display (Not used in servicing) The detrack is displayed as follows. ADR = 6. IVR display (Not used in servicing) The IVR is displayed as follows. [][][
20
MEANINGS OF OTHER DISPLAYS
Display ( P REC SYNC A.SPACE OVER B ATRACK DISC SLEEP MONO Contents When Lit During continuous playback (CLV: ON) Tracking servo OFF Recording mode ON CLV low speed mode ABCD adjustment completed Tracking offset cancel ON Tracking auto gain OK Focus auto gain OK Pit High reflection CLV-S CLV LOCK Groove Low reflection CLV-A CLV UNLOCK Tracking offset cancel OFF STOP (CLV: OFF) Tracking servo ON Recording mode OFF CLV normal mode When Off
21
SECTION 5 ELECTRICAL ADJUSTMENTS
1. PARTS REPLACEMENT AND ADJUSTMENT
· Check and adjust the mechanism deck as follows. The procedure changes according to the part replaced · Abbreviation OP : Optical pick-up OWH : Overwrite head
· Temperature compensation offset check · Laser power check · Traverse check · Focus bias check · C PLAY check · Self-recording/playback check OK
NG Parts Replacement and Repair
Check the sled and spindle mechanisms. Other causes can be suspected.
Has the OWH been replaced?
YES
NO
Has OP, IC171, IC101, or IC121 been replaced?
YES Initial setting of the adjustment value NO
Has OP or IC171 been replaced?
NO
YES IOP information recording (IOP value labeled on OP)
Has IC171 or D101 been replaced?
YES Temperature compensation offset adjustment
NO
· Laser power adjustment · Traverse adjustment · Focus bias adjustment · Error rate adjustment · Focus bias check · Auto gain adjustment
22
2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION
To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight.
3. PRECAUTIONS FOR USE OF OPTICAL PICK-UP (KMS-260A)
As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when using it. Before disconnecting the connector, desolder first. Before connecting the connector, be careful not to remove the solder. Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.
pick-up flexible board
4. Use the following tools and measuring devices. · Check Disc (MD) TDYS-1 (Part No. 4-963-646-01) · Test Disc (MDW-74/AU-1) (Part No. 8-892-341-41) · Laser power meter LPM-8001 (Part No. J-2501-046-A) or MD Laser power meter 8010S (Part No. J-2501-145-A) · Oscilloscope (Measure after performing CAL of prove) · Digital voltmeter · Thermometer · Jig for checking BD board waveform (Part 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. Using the above jig enables the waveform to be checked without the need to solder. (Refer to Servicing Notes on page 6) 7. As the disc used will affect the adjustment results, make sure that no dusts nor fingerprints are attached to it.
Laser power meter
When performing laser power checks and adjustment (electrical adjustment), use of the new MD laser power meter 8010S (Part No. J-2501-145-A) instead of the conventional laser power meter is convenient. It sharply reduces the time and trouble to set the laser power meter sensor onto the objective lens of optical pick-up.
laser tap
Optical pick-up flexible board
4. PRECAUTIONS FOR ADJUSTMENTS
1. When replacing the following parts, perform the adjustments and checks with ¬ in the order shown in the following table.
Optical Pick-up IC171 1. Initial setting of adjustment value 2. Recording of IOP information (Value on the optical pick-up label) 3. Temperature compensation offset adjustment 4. Laser power adjustment 5. Traverse adjustment 6. Focus bias adjustment 7. Error rate check 8. Auto gain output level adjustment ¬ ¬ BD Board D101 G IC101, IC121 IC192 ¬ G
5. CREATING CONTINUOUSLY-RECORDED DISC
* This disc is used in focus bias adjustment and error rate check. The following describes how to create a continuous recording disc. 1. Insert a disc (blank disc) commercially available. ± 2. Turn the [ AMS ] knob and display "CREC MODE". (C31) 3. Press the [YES] button again to display "CREC MID". Display "CREC (0300)" and start to recording. 4. Complete recording within 5 minutes. 5. Press the [MENU/NO] button and stop recording . 6. Press the [EJECT ] button and remove the disc. § The above has been how to create a continuous recorded data for the focus bias adjustment/check and MO error rate check.
Note : · Be careful not to apply vibration during continuous recording.
¬
¬
G
G
G
G
¬
¬
G
G
¬ ¬
¬ ¬
G G
¬ ¬
¬ G
¬ ¬ ¬
¬ ¬ ¬
G G G
¬ ¬ ¬
G G G
2. Set the test mode when performing adjustments. After completing the adjustments, release the test mode. Perform the adjustments and checks in "group S" of the test mode. 3. Perform the adjustments to be needed in the order shown.
23
6. CHECK PRIOR TO REPAIRS
These checks are performed before replacing parts according to "approximate specifications" to determine the faulty locations. For details, refer to "Checks Prior to Parts Replacement and Adjustments" (See page 8). 6-1. Temperature Compensation Offset Check When performing adjustments, set the internal temperature and room temperature of 22 °C to 28 °C. Checking Procedure: ± 1. Turn the [ AMS ] knob to display "TEMP CHECK" (C01). 2. Press the [YES] button. 3. "T=@@(##) [OK" should be displayed. If "T=@@ (##) [NG" is displayed, it means that the results are bad. (@@ indicates the current value set, and ## indicates the value written in the non-volatile memory) 6-2. Laser Power Check Before checking, check the IOP value of the optical pick-up. (Refer to 8. Recording and Displaying IOP Information) Connection :
laser power meter
Note 1: After step 4, each time the [YES] button is pressed, the display will be switched "LD 0.7 mW $ ", "LD 6.2 mW $ ", and "LD Wp $ ". Nothing needs to be performed here.
6-3. Traverse Check
Note 1:Data will be erased during MO reading if a recorded disc is used in this adjustment. Note 2:If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be seen more clearly. oscilloscope (DC range)
BD board CN110 pin 3 (TEO) CN110 pin 1 (VC)
330 k
+
10 pF
Connection :
oscilloscope (DC range) BD board CN110 pin 3 (TEO) CN110 pin 1 (VC)
+
V: 0.1 V/div H: 10 ms/div
Optical pick-up objective lens
digital voltmeter BD board CN110 pin 5 (I +3V) CN110 pin 4 (IOP)
+
Checking Procedure: 1. Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, press the [ ] but0 ton or [ ] button to move the optical pick-up) ) Connect the digital voltmeter to CN110 pin 5 (I+3V) and CN110 pin 4 (IOP) on the BD board. ± 2. Then, turn the [ AMS ] knob to display "LDPWR CHECK" (C02). 3. Press the [YES] button once to display "LD 0.9 mW $ ". Check that the reading of the laser power meter become 0.84 to 0.92 mW. 4. Press the [YES] button once more to display "LD 7.0 mW $ ". Check that the reading the laser power meter and digital voltmeter satisfy the specified value. Specified Value: Laser power meter reading : 7.0 ± 0.2 mW Digital voltmeter reading : Value on the optical pick-up label ±10%
(Optical pick-up label)
KMS260A 27X40 B0825
Checking Procedure: 1. Connect an oscilloscope to CN110 pin 3 (TEO) and CN110 pin 1 (VC) on the BD board. 2. Load a disc (any available on the market). (Refer to Note 1) 3. Press the [ ] button to move the optical pick-up outside the ) pit. ± 4. Turn the [ AMS ] knob to display "EF MO CHECK"(C03). MO-R". 5. Press the [YES] button to display "EFB = (Laser power READ power/Focus servo ON/tracking servo OFF/spindle (S) servo ON) 6. Observe the waveform of the oscilloscope, and check that the ± specified value is satisfied. Do not turn the[ AMS ] knob. (Read power traverse checking)
Traverse Waveform
A VC B Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
7. Press the [YES] button to display "EFB = MO-W". 8. Observe the waveform of the oscilloscope, and check that the ± specified value is satisfied. Do not turn the [ AMS ] knob. (Write power traverse checking)
Traverse Waveform
A VC B
lOP=82.5 mA in this case lOP (mA) = Digital voltmeter reading (mV)/1 ()
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
5. Press the [MENU/NO] button to display "LDPWR CHECK" and stop the laser emission. (The [MENU/NO] button is effective at all times to stop the laser emission)
24
9. Press the [YES] button to display "EFB = MO-P". Then, the optical pick-up moves to the pit area automatically and servo is imposed. 10. Observe the waveform of the oscilloscope, and check that the ± specified value is satisfied. Do not turn the [ AMS ] knob.
Traverse Waveform
A VC B Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
11. Press the [YES] button to display "EF MO CHECK" The disc stops rotating automatically. 12. Press the [EJECT ] button and take out the disc. § 13. Load the check disc (MD) TDYS-1. ± 14. Turn the [ AMS ] knob and display "EF CD CHECK" (C04). 15. Press the [YES] button to display "EFB = CD". Servo is imposed automatically. 16. Observe the waveform of the oscilloscope, and check that the ± specified value is satisfied. Do not turn the [ AMS ] knob.
Traverse Waveform
A VC B Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
6-4. Focus Bias Check Change the focus bias and check the focus tolerance amount. Checking Procedure : 1. Load the test disk (MDW-74/AU-1). ± 2. Turn the [ AMS ] knob to display "CPLAY MODE" (C30). 3. Press the [YES] button twice to display "CPLAY MID". 4. Press the [MENU/NO] button when "C = AD = " is displayed. ± 5. Turn the [ AMS ] knob to display "FBIAS CHECK" (C05). 6. Press the [YES] button to display " / c = ". The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [c =] indicate the focus bias value. Check that the C1 error is below 50 and ADER is below 2. 7. Press the [YES] button to display " / b = ". Check that the C1 error is about 200 and ADER is below 2. 8. Press the [YES] button to display " / a = ". Check that the C1 error is about 200 and ADER is below 2. 9. Press the [MENU/NO] button, then press the [EJECT ] but§ ton and take out the test disc. 6-5. C PLAY Checking MO Error Rate Check Checking Procedure : 1. Load the test disk (MDW-74/AU-1). ± 2. Turn the [ AMS ] knob to display "CPLAY MODE" (C30). 3. Press the [YES] button to display "CPLAY MID". 4. The display changes to "C = AD = ". 5. If the C1 error rate is below 80, check that ADER is below 2. 6. Press the [MENU/NO] button to stop playback, then press the [EJECT ] button and take out the test disc. § CD Error Rate Check Checking Procedure : 1. Load the check disc (MD) TDYS-1. ± 2. Turn the [ AMS ] knob to display "CPLAY MODE" (C30). 3. Press the [YES] button twice to display "CPLAY MID". 4. The display changes to "C = AD = ". 5. Check that the C1 error rate is below 50. 6. Press the [MENU/NO] button to stop playback, then press the [EJECT ] button and take out the check disc. § 6-6. Self-Recording/playback Check Prepare a continuous recording disc using the unit to be repaired and check the error rate. Checking Procedure : 1. Load a recordable disc (blank disc). ± 2. Turn the [ AMS ] knob to display "CREC MODE" (C31). 3. Press the [YES] button to display "CREC MID". 4. When recording starts, lights up " REC " and display "CREC @@@@" (@@@@ is the address). 5. About 1 minute later, press the [MENU/NO] button to stop continuous recording. ± 6. Turn the [ AMS ] knob to display "CPLAY MODE" (C30). 7. Press the [YES] button to display "CPLAY MID". 8. "C = AD = " will be displayed. 9. Check that the C1 error becomes below 80 and the AD error below 2. 10. Press the [MENU/NO] button to stop playback, then press the [EJECT ] button and take out the disc. §
17. Press the [YES] button to display "EF CD CHECK". 18. Press the [EJECT ] button and take out the check disc. §
25
7. INITIAL SETTING OF ADJUSTMENT VALUE
Note: Mode which sets the adjustment results recorded in the non-volatile memory to the initial setting value. However the results of the temperature compensation offset adjustment will not change to the initial setting value. If initial setting is performed, perform all adjustments again excluding the temperature compensation offset adjustment. For details of the initial setting, refer to "4. Precautions on Adjustments" and execute the initial setting before the adjustment as required.
9. TEMPERATURE COMPENSATION OFFSET ADJUSTMENT
Save the temperature data at that time in the non-volatile memory as 25 °C reference data.
Note : 1. Usually, do not perform this adjustment. 2. Perform this adjustment in an ambient temperature of 22 °C to 28 °C. Perform it immediately after the power is turned on when the internal temperature of the unit is the same as the ambient temperature of 22 °C to 28 °C. 3. When D101 has been replaced, perform this adjustment after the temperature of this part has become the ambient temperature.
Setting Procedure : ± 1. Turn the [ AMS ] knob to display "ADJ CLEAR" (C24). 2. Press the [YES] button. "Complete!" will be displayed momentarily and initial setting will be executed, after which "ADJ CLEAR" will be displayed.
8. RECORDING AND DISPLAYING THE IOP INFORMATION
The IOP data can be recorded in the non-volatile memory. The IOP value on the optical pick-up label and the IOP value after the adjustment will be recorded. Recording these data eliminates the need to read the label on the optical pick-up. Recording Procedure : ± 1. Turn the [ AMS ] knob to display "Iop Write" (C28), and press the [YES] button. 2. The display becomes Ref=@@@.@ (@ is an arbitrary number) and the numbers which can be changed will blink. 3. Input the IOP value on the optical pick-up label. ± To select the number : Turn the [ AMS ] knob. ± To select the digit : Press the [ AMS ] knob 4. When the [YES] button is pressed, the display becomes "Measu=@@@.@" (@ is an arbitrary number). 5. As the adjustment results are recorded for the 6 value. Leave it as it is and press the [YES] button. 6. "Complete!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write". Display Procedure : ± 1. Turn the [ AMS ] knob to display "Iop Read"(C27). 2. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ indicates the IOP value on the optical pick-up label. ##.# indicates the IOP value after adjustment ± 3. To end, press the [ AMS ] button or [MENU/NO] button to display "Iop Read".
Adjusting Procedure : ± 1. Turn the [ AMS ] knob to display "TEMP ADJUS" (C09). 2. Press the [YES] button to select the "TEMP ADJUS" mode. 3. "TEMP = [OK" and the current temperature data will be displayed. 4. To save the data, press the [YES] button. When not saving the data, press the [MENU/NO] button. 5. When the [YES] button is pressed, "TEMP = SAVE" will be displayed and turned back to "TEMP ADJUS" display then. When the [MENU/NO] button is pressed, "TEMP ADJUS" will be displayed immediately. Specified Value : The "TEMP = " should be within "E0 - EF", "F0 - FF", "00 0F", "10 - 1F" and "20 - 2F".
10. LASER POWER ADJUSTMENT
Check the IOP value of the optical pick-up before adjustments. (Refer to 8. Recording and Displaying IOP Information) Connection :
laser power meter
Optical pick-up objective lens
digital voltmeter BD board CN110 pin 5 (I +3V) CN110 pin 4 (IOP)
+
Adjusting Procedure : 1. Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, press the [ ] button 0 or [ ] button to move the optical pick-up) ) Connect the digital voltmeter to CN110 pin 5 (I+3V) and CN110 pin 4 (IOP) on the BD board. ± 2. Turn the [ AMS ] knob to display "LDPWR ADJUS" (C10). (Laser power : For adjustment) 3. Press the [YES] button once to display "LD 0.9 mW $ ". ± 4. Turn the [ AMS ] knob so that the reading of the la ser power meter becomes 0.85 to 0.91 mW. Press the [YES] button after setting the range knob of the laser power meter, and save the adjustment results. ("LD SAVE $ " will be displayed for a moment) 5. Then "LD 7.0 mW $ " will be displayed. ± 6. Turn the [ AMS ] knob so that the reading of the laser power meter becomes 6.9 to 7.1 mW, press the [YES] button to save it.
Note: Do not perform the emission with 7.0 mW more than 15 seconds continuously.
26
± 7. Then, turn the [ AMS ] knob to display "LDPWR CHECK" (C02). 8. Press the [YES] button once to display "LD 0.9 mW $ ". Check that the reading of the laser power meter become 0.85 to 0.91 mW. 9. Press the [YES] button once more to display "LD 7.0 mW $ ". Check that the reading the laser power meter and digital voltmeter satisfy the specified value. Note down the digital voltmeter reading value.
11. TRAVERSE ADJUSTMENT
Note 1: Data will be erased during MO reading if a recorded disc is used in this adjustment. Note 2: If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be seen more clearly. oscilloscope (DC range)
BD board CN110 pin 3 (TEO) CN110 pin 1 (VC)
330 k
+
Specified Value: Laser power meter reading : 7.0 ± 0.2 mW Digital voltmeter reading : Value on the optical pick-up label ±10%
(Optical pick-up label)
KMS260A 27X40 B0825
10 pF
Connection :
oscilloscope (DC range) BD board CN110 pin 3 (TEO) CN110 pin 1 (VC)
+
V: 0.1 V/div H: 10 ms/div
lOP=82.5 mA in this case lOP (mA) = Digital voltmeter reading (mV)/1 ()
10. Press the [MENU/NO] button to display "LDPWR CHECK" and stop the laser emission. (The [MENU/NO] button is effective at all times to stop the laser emission.) ± 11. Turn the [ AMS ] knob to display "Iop Write"(C28). 12. Press the [YES] button. When the display becomes Ref=@@@.@ (@ is an arbitrary number), press the [YES] button to display "Measu=@@@.@" (@ is an arbitrary number). 13. The numbers which can be changed will blink. Input the Iop value noted down at step 9. ± To select the number : Turn the [ AMS ] knob. ± To select the digit : Press the [ AMS ] knob. 14. When the [YES] button is pressed, "Complete!" will be displayed momentarily. The value will be recorded in the nonvolatile memory and the display will become "Iop Write".
Note 1: After step 4, each time the [YES] button is pressed, the display will be switched "LD 0.7 mW $ ", "LD 6.2 mW $ ", and "LD Wp $ ". Nothing needs to be performed here.
Adjusting Procedure : 1. Connect an oscilloscope to CN110 pin 3 (TEO) and CN110 pin 1 (VC) on the BD board. 2. Load a disc (any available on the market). (Refer to Note 1) 3. Press the [ ] button to move the optical pick-up outside the ) pit. ± 4. Turn the [ AMS ] knob to display "EF MO ADJUS" (C10). 5. Press the [YES] button to display "EFB = MO-R". (Laser power READ power/Focus servo ON/tracking servo OFF/spindle (S) servo ON) ± 6. Turn the [ AMS ] knob so that the waveform of the oscilloscope becomes the specified value. ± of "EFB= (When the [ AMS ] knob is turned, the " changes and the waveform changes.) In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Read power traverse adjustment)
Traverse Waveform
A VC B Specification A = B
7. Press the [YES] button and save the result of adjustment to the non-volatile memory ("EFB = SAV" will be displayed for a moment. Then "EFB = MO-W" will be displayed).
27
8. Turn the [ AMS ] knob so that the waveform of the ± oscilloscope becomes the specified value. of "EFB(When the [ AMS ] knob is turned, the ± " changes and the waveform changes.) In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Write power traverse adjustment)
Traverse Waveform
SAV" for a mo18. Press the [YES] button, display "EFB = ment and save the adjustment results in the non-volatile memory. Next "EF CD ADJUS" will be displayed. 19. Press the [EJECT ] button and take out the disc. §
12. FOCUS BIAS ADJUSTMENT
Adjusting Procedure : 1. Load the continuously-recorded disc. (Refer to "5. CREATING CONTINUOUSLY-RECORDED DISC") 2. Turn the [ AMS ] knob to display "CPLAY MODE" ± (C29). 3. Press the [YES] button to display "CPLAY MID". 4. Press the [MENU/NO] button when "C = AD = " is displayed. 5. Turn the [ AMS ] knob to display "FBIAS ADJUS" ± (C13). / a = ". 6. Press the [YES] button to display " The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [a =] indicate the focus bias value. ± 7. Turn the [ AMS ] knob clockwise and find the focus bias value at which the C1 error rate becomes about 200 (Refer to Note 2). / b = ". 8. Press the [YES] button to display " 9. Turn the [ AMS ] knob counterclockwise and find the ± focus bias value at which the C1 error rate becomes about 200. 10. Press the [YES] button to display " / c = ". 11. Check that the C1 error rate is below 50 and ADER is 00. Then press the [YES] button. 12. If the "( )" in " - - ( )" is above 20, press the [YES] button. If below 20, press the [MENU/NO] button and repeat the adjustment from step 2. 13. Press the [EJECT ] button and take out the disc. §
Note 1: The relation between the C1 error and focus bias is as shown in the following figure. Find points A and B in the following figure using the above adjustment. The focal point position C is automatically calculated from points A and B. Note 2: As the C1 error rate changes, perform the adjustment using the average vale.
A VC B Specification A = B
9. Press the [YES] button, and save the adjustment results in the non-volatile memory. ("EFB = SAV" will be displayed for a moment) 10. "EFB = MO-P" will be displayed. The optical pick-up moves to the pit area automatically and servo is imposed. ± 11. Turn the [ AMS ] knob until the waveform of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.
Traverse Waveform
A VC B Specification A = B
12. Press the [YES] button, and save the adjustment results in the SAV" will be displayed for non-volatile memory. ("EFB = a moment.) Next "EF MO ADJUS" is displayed. The disc stops rotating automatically. 13. Press the [EJECT ] button and take out the disc. § 14. Load the check disc (MD) TDYS-1. ± 15. Turn the [ AMS ] knob to display "EF CD ADJUS" (C12). 16. Press the [YES] button to display "EFB = CD". Servo is imposed automatically. ± 17. Turn the [ AMS ] knob so that the waveform of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.
Traverse Waveform
A VC B Specification A = B
C1 error about 200
B
C
A
Focus bias value (F. BIAS)
28
13. ERROR RATE CHECK
13-1. CD Error Rate Check Checking Procedure : 1. Load the check disc (MD) TDYS-1. ± 2. Turn the [ AMS ] knob and display "CPLAY MODE" (C30). 3. Press the [YES] button twice and display "CPLAY MID". 4. The display changes to "C = AD = ". 5. Check that the C1 error rate is below 20. 6. Press the [MENU/NO] button to stop playback, then press the [EJECT ] button and take out the check disc. § 13-2. MO Error Rate Check Checking Procedure : 1. Load the continuously-recorded disc. (Refer to "5. CREATING CONTINUOUSLY-RECORDED DISC") ± 2. Turn the [ AMS ] knob to display "CPLAY MODE" (C30). 3. Press the [YES] button to display "CPLAY MID". 4. The display changes to "C1 = AD = ". 5. If the C1 error rate is below 50, check that ADER is 00. 6. Press the [MENU/NO] button to stop playback, then press the [EJECT ] button and take out the test disc. §
15. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT
Be sure to perform this adjustment when the optical pick-up is replaced. If the adjustment results becomes "Adjust NG!", the optical pickup may be faulty or the servo system circuits may be abnormal. 15-1. CD Auto Gain Control Output Level Adjustment Adjusting Procedure : 1. Load the check disc (MD) TDYS-1. ± 2. Turn the [ AMS ] knob to display "AG Set (CD)" (C26). 3. When the [YES] button is pressed, the adjustment will be performed automatically. "Complete!!" will then be displayed momentarily when the value is recorded in the non-volatile memory, after which the display changes to "AG Set (CD)". 4. Press the [EJECT ] button and take out the check disc. § 15-2. MO Auto Gain Control Output Level Adjustment Adjusting Procedure : 1. Load the test disc (MDW-74/AU-1). ± 2. Turn the [ AMS ] knob to display "AG Set (MO)" (C25). 3. When the [YES] button is pressed, the adjustment will be performed automatically. "Complete!!" will then be displayed momentarily when the value is recorded in the non-volatile memory, after which the display changes to "AG Set (MO)". 4. Press the [EJECT ] button and take out the test disc. §
14. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount. Checking Procedure : 1. Load the continuously-recorded disc. (Refer to "5. CREATING CONTINUOUSLY-RECORDED DISC") ± 2. Turn the [ AMS ] knob to display "CPLAY MODE" (C30). 3. Press the [YES] button twice to display "CPLAY MID". 4. Press the [MENU/NO] button when "C = AD = " is displayed. ± 5. Turn the [ AMS ] knob to display "FBIAS CHECK" (C05). / c = ". 6. Press the [YES] button to display " The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [c =] indicate the focus bias value. Check that the C1 error is below 50 and ADER is below 2. 7. Press the [YES] button and display " / b = ". Check that the C1 error is about 200 and ADER is below 2. 8. Press the [YES] button and display " / a = ". Check that the C1 error is about 200 and ADER is below 2 9. Press the [MENU/NO] button, then press the [EJECT ] but§ ton and take out the disc.
Note 1: If the C1 error and ADER are above other than the specified value at points A (step 8. in the above) or B (step 7. in the above), the focus bias adjustment may not have been carried out properly. Adjust perform the beginning again.
29
Adjustment Location: BD BOARD (Side A)
CN101 D101
CN110
GND I+3V IOP TEO RF VC
NOTE
IC171
BD BOARD (Side B)
IC101
IC121
IC192
Note: It is useful to use the jig for checking the waveform. (Refer to Servicing Notes on page 6)
30
MDS-JB930 SECTION 6 DIAGRAMS
6-1. BLOCK DIAGRAM SERVO Section
OVER WRITE HEAD DRIVE IC181, Q181, 182 HR901 OVER WRITE HEAD SCTX FILTER DIGITAL SIGNAL PROCESSOR, EFM/ACIRC ENCODER/DECODER, SHOCK PROOF MEMORY CONTROLLER, ATRAC ENCODER/DECODER IC121 (1/2) 100 60 59 62 61 ADDT 15 TX EFMO FILI PCO CLTV FILO PLL SHOCK PROOF MEMORY CONTROLLER EFM/ACIRC ENCODER/DECODER ATRAC ENCODER/DECODER SAMPLING RATE CONVERTER IC121 (1/2) ADDT DATAI XBCKI LRCKI 25 OPT1 22 24 23 7 OUT OPT2 COAX SEL0 SEL1 COAX 5 3 4 WAVE SHAPER IC301 DIGITAL INPUT SELECTOR IC300 6 OPTICAL RECEIVER IC303 OPTICAL RECEIVER IC302
A
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DIGITAL OPTICAL IN 1
DIGITAL OPTICAL IN2 J300 DIGITAL COAXIAL IN
DIN0 DIGITAL AUDIO INTERFACE DIN1 DOUT
48 MORFO OPTICAL PICK-UP (KMS-260A/J1N) I J I J
47 MORFI
19 20 21
RF AMP, FOCUS/TRACKING ERROR AMP IC101
53
ASYO
14 2 WAVE SHAPER IC305
OPTICAL TRANSCEIVER IC304 T301
DIGITAL OPTICAL OUT J301 DIGITAL COAXIAL OUT
1 2
54 RF AMP RFO 46 40 AGCI RF AGC & EQ RF 38 57
ASYI RFI COMPARATOR
DADT 26 XBCK 28 LRCK 27 FS256 29
WBL B.P.F. 3T TEMP B WBL I C D B A PEAK & BOTTOM
EQ AUX PEAK BOTM 33 37 36 ADFG SUBCODE PROCESSOR INTERNAL BUS CLOCK GENERATOR OSCI OSCO
DADT, BCK, LRCK
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B
16 17 D-RAM IC124 DIVIDER IC123 512FS
C
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F
D0 D3
AT AMP A 4 5 6 7 A B C D I-V AMP
B.P.F. ABCD AMP
ADFM
29
30
ADIN
ADFG
32
78
ABCD FOCUS ERROR AMP FE
35 34 79 F0CNT SPINDLE SERVO
E DETECTOR C D E F
CPU INTERFACE
MONITOR CONTROL A00 A09
34 31, 36 40, 45
6 9, 11 15, 5 16 3 4 17
SWDT SCLK XLAT
MNT0 MNT1 MNT2 MNT3
SPRD
DQSY
SQSY
SRDT
SENS
SPFD
8 9
E F I-V AMP TRACKING ERROR AMP COMMAND EQ 3T WBL
TE SE
26 28
94 93
12 11
14
9
8
5 6 7
1 2 3 4 FOK SHOCK XBUSY SLOCK
ILCC PD LD
AUTOMATIC POWER CONTROL Q162, 163
11
APC
LD/PD AMP
SERIAL/PARALLEL CONVERTER, DECODER APCREF
V-I CONVERTER
F0CNT
20
SWDT SCLK
XOE 43 XWE 47 XRAS 46 XCAS 44
XOE XWE XRAS XCAS SWDT, SCLK
LASER DIODE SWDT SCLK XLAT PD LASER ON SWITCH Q101 10 PD
A0 A9
XINT
DQ1 DQ4
J
1, 2, 18, 19
ADIP DEMODULATOR/ DECODER
49, 48, 50, 51
D
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12
16 17 18
18 DQSY
5 SQSY
23 XINT
55 32 31 33 70 SWDT SRDT SCLK XLATCH SENS
67 54 52 60 MNT0 (FOK) MNT1 (SHOCK) MNT2 (XBUSY) MNT3 (SLOCK) OPT2/XOPT1 86 COAX/XOPT 85 SCTX 65 SEL0 SEL1
56 LDON 53 DIG-RST 59 WR-PWR LDOUT 69 MOD 16 PSB M101 (SPINDLE) SPFD SPRD 83 APCREF 10 XRST 13 RECP AUTOMATIC POWER CONTROL 67 65 66 75 74 63 64 AUX1 ABCD FE TE SE PEAK BOTM 5 IN1 6 IN2 LDIN
FOCUS/TRACKING COIL DRIVE, SPINDLE/SLED MOTOR DRIVE IC152
SYSTEM CONTROLLER IC800 (1/2)
· SIGNAL PATH : PLAY (ANALOG OUT) : PLAY (DIGITAL OUT) : REC (ANALOG IN) : REC (DIGITAL IN)
78 79
M
6 8
OUT4F OUT4R
IN4R IN4F
3 4
UNREG +12V
LIMIT-IN 68
S101 (LIMIT IN) S601 (REC POSITION)
M102 (SLED)
M
27 OUT2F 25 OUT2R
IN2F 29 IN2R 30
92 91
SFDR SRDR
ANALOG MUX
OUT1
OUT2
LOADING MOTOR DRIVE IC400
VZ
4
REFERENCE VOLTAGE SWITCH Q400, 401 80 LD-LOW
REC-P 77
PWM GENERATOR
A/D CONVERTER DIGITAL SERVO SIGNAL PROCESS
PACK-OUT 76
2 FROM CPU INTERFACE XLRF XLAT 80 CKRF SCLK 81 DTRF SWDT 82 HF MODULE SWITCH IC103, Q102 104
10 PB-P 74
S602 (PACK OUT)
2-AXIS DEVICE (TRACKING) (FOCUS)
FCS+
21 OUT1F 23 OUT1R
IN1F 19 IN1R 18
FFDR 88 FRDR 89
M
M103 (LOADING)
S604 (PLAY POSITION)
FCS TRK+ TRK
AUTO SEQUENCER 12 OUT3F 10 OUT3R IN3F 14 IN3R 15 TFDR 86 TRDR 85 DIGITAL SERVO SIGNAL PROCESSOR IC121 (2/2)
REFLECT 57 PROTECT 58 S102 (REFLECT/PROTECT DETECT) HIGH REFELECT RATE/ WRITE PROTECT LOW REFELECT RATE/ UN-PROTECT
HF MODULE
MOD
05
31
31
MDS-JB930
6-2. BLOCK DIAGRAM MAIN Section
A/D CONVERTER IC100 HIGH-PASS FILTER, DIGITAL ATTENUATOR AINL A/D CONVERTER BLOCK SUBTRACKTION AINR 3 2 R-CH RV760 REC LEVEL A CDTI 15 CCLK 16 CS 17 CONTROL REGISTER INTERFACE CLOCK GENERATOR, CLOCK DIVIDER XTI 9 PD 19 ROTARY ENCODER RV760 B R-CH R L LINE (ANALOG) OUT LINE AMP IC103 R-CH J100 L R
· SIGNAL PATH : PLAY (ANALOG OUT) : REC (ANALOG IN)
LINE (ANALOG) IN
A
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ADDT BCK LRCK
13
SDTO AUDIO INTERFACE CONTROLLER
BICK 12 LRCK 11
SWDT SCLK
52 D/A CONVERTER IC200 OVFLAG OVERFLOW DETECTOR FIR ATT & L.I.P. NOISE SHAPER & REGISTER L1+ L1 L2+ L2 R1+ R1 R2+ R2 INIT 43 256FSO ATT SHIFT LATCH 64FSO LVCKO 64FSI CLOCK BUFFER CLOCK GENERATOR 1024FS CLOCK BUFFER XIN 29 X800 10MHz 87 DALATCH 13 XOUT 15 XIN XOUT 28 X200 45MHz X801 32.768kHz 11 XT-OUT 10 XT-IN 88 DARST 82 A1OUT IN1+ 25 IN1 24 IN2+ 27 IN2 28
CURRENT PULSE IC204 I01+ I02 I02+ I01
RV790 PHONE LEVEL 1 2 5 4 BUFFER IC241 MIX AMP IC243 (1/2) LOW-PASS FILTER IC243 (2/2) MUTING Q200 203 R-CH J800 CONTROL A1 II MUTING CONTROL SWITCH Q702 2 +5V D/A CONVERTER (IC200) B+ (FOR ANALOG SECTION) +5V REGULATOR IC205 J790 PHONES R-CH 1 HEADPHONE AMP IC790
DADT 3 BCK LRCK 2 4
DATA ATT & IIR BCK LRCK S/P
B
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DADT, BCK, LRCK
PLM & BUFFER
21 20 24 25 36 37 33 32 5
SWITCHING CIRCUIT
47 54
MCLKI 128FSO TIMING CONTROL MODE CONTROL
R-CH
CONTROL CIRCUIT
C
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512FS
41
SDA
6 7 8 SWDT SCLK
48
40
SCL
SIRCS BUFFER Q800
EEPROM IC171 +5V A/D CONVERTER (IC100) B+ (FOR ANALOG SECTION) D703 +5V REGULATOR IC102 T701 POWER TRANSFORMER +7V +7V REGULATOR IC703 7V REGULATOR IC702 RY700 RECT D715 718
D704
D800
5
6 A B 83 MUT