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Self Diagnosis, Dolby -
Service Manual
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MDS-PC2
SERVICE MANUAL
US Model Canadian Model AEP Model UK Model E Model
Model Name Using Similar Mechanism MD Mechanism Type Optical Pick-up Type
MDS-S40 MDM-5A KMS-260B/J1N
SPECIFICATIONS
-- Continued on next page --
MINIDISC DECK
MICROFILM
1
SELF-DIAGNOSIS FUNCTION
The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes which show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box in the instruction manual. For details on how to check error codes during servicing, refer to the following "Procedure for using the SelfDiagnosis Function (Error History Display Mode)".
Procedure for using the Self-Diagnosis Function (Error History Display Mode). Note: Perform the self-diagnosis function in the "error history display mode" in the test mode. The following describes the least required procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the p "PROGRAM" button to exit the mode. 1. 2. 3. 4. 5. 6. 7. 8. 9. While pressing the INPUT button and p button, connect the power plug to the outlet, and release the INPUT button and p button. Press the + button and when "[Service]" is displayed, press the ^ "PROGRAM" button. Press the + button and display "ERR DP MODE". Pressing the ^ "PROGRAM" button sets the error history mode and displays "total rec". Select the contents to be displayed or executed using the + button. Pressing the r "PROGRAM" button will display or execute the contents selected. Pressing the r "PROGRAM" button another time returns to step 4. Pressing the p "PROGRAM" button displays "ERROR DP MODE" and exits the error history mode. To exit the test mode, press the 6 "1" button. The unit sets into the STANDBY state, the disc is ejected, and the test mode ends.
*Note: As this unit has only a few buttons, one button is assigned with several functions in the test mode. Press the INPUT button to switch the functions. Each time the INPUT button is pressed, the display switches in the following order; "PROGRAM" n "1" n blank n "PROGRAM" The functions of each button change with the display. For simplicity, operations of the INPUT button will not be described here. Instead, symbols are added to the names of buttons. Press the INPUT button as required to switch the display. Example) p "PROGRAM" : Display "PROGRAM" and press the p button. p "1" : Display "1" and press the p button.
2
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 pressing the + button. 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 r "PROGRAM" button and "er refresh?" is displayed, press the ^ "PROGRAM" 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 pickup. If the optical pickup has been replaced, perform this operation and erase the history. After pressing the ^ "PROGRAM" button and "tm refresh?" is displayed, press the r "PROGRAM" 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 E02 E03 E04 No error Read error. PTOC cannot be read (DISC ejected) TOC error. UTOC error (DISC not ejected) Loading error Address cannot be read (Servo has deviated) E0A Details of Error 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) Play retry error (C2 error)
3
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. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
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.
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 -- MODEL NUMBER LABEL --
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.
Parts No.
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.
PARTS No. 4-220-576-0 4-220-577-0 4-220-578-0 4-220-579-0
MODEL US model Canadian model AEP, UK model Singapore model
4
SAFETY CHECK-OUT After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, "metallized" knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE The AC leakage from any exposed metal part to earth Ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microampers). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers' instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The "limit" indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)
TABLE OF CONTENTS 1. SERVICING NOTE .......................................................... 6 2. GENERAL ........................................................................ 12 3. DISASSEMBLY
3-1. 3-2. 3-3. 3-4. 3-5. Case and Front Panel .......................................................... 14 MD Mechanism .................................................................. 14 Slider (CAM) ...................................................................... 15 Base Unit (MBU-5A) BD Board ........................................ 15 SW Board and Loading Motor (M103) .............................. 16
4. TEST MODE ..................................................................... 17 5. ELECTRICAL ADJUSTMENTS ............................... 22 6. DIAGRAMS
6-1. Circuit Boards Location ...................................................... 31 6-2. Block Diagrams · BD Section ....................................................................... 33 · Main Section .................................................................... 34 6-3. Printed Wiring Board BD Section ................................. 36 6-4. Schematic Diagram BD (1/2) Section ........................... 37 6-5. Schematic Diagram BD (2/2) Section ........................... 38 6-6. Schematic Diagram Main (1/2) Section ........................ 39 6-7. Schematic Diagram Main (2/2) Section ........................ 40 6-8. Printed Wiring Board Main Section .............................. 41 6-9. Schematic Diagram Panel Section ................................ 42 6-10. Printed Wiring Board Panel Section ............................ 43 6-11. Schematic Diagram Power Section ............................. 44 6-12. Printed Wiring Board Power Section .......................... 45 6-13. Schematic Diagram BD Switch Section ..................... 46 6-14. Printed Wiring Board BD Switch Section ................... 46 6-15. IC Block Diagrams ........................................................... 46 6-15. IC Pin Functions ............................................................... 49
To Exposed Metal Parts on Set
0.15µF
1.5k
AC voltmeter (0.75V)
Earth Ground
7. EXPLODED VIEWS
7-1. Cabinet Section ................................................................... 53 7-2. Mechanism Section (MDM-5A) ......................................... 54 7-3. Base Unit Section (MBU-5A) ............................................. 55
Fig. A. Using an AC voltmeter to check AC leakage.
8. ELECTRICAL PARTS LIST ........................................ 56
5
SECTION 1 SERVICING NOTE
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 I+3V IOP TEO VC RF : : : : : : Ground For measuring IOP (Check the deterioration of the optical pick-up laser) For measuring IOP (Check the deterioration of the optical pick-up laser) TRK error signal (Traverse adjustment) Reference level for checking the signal RF signal (Check jitter)
Mechanism deck
CN110 6P connector
5P connector
VC RF TEO IOP I+3V GND
RF VC TEO IOP I+3V GND
1 RF VC TEO For MDM-3 IOP 5 I+3V 1 VC RF TEO For MDM-5 IOP I+3V 6 GND
6
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 label of the optical pick-up. 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 Precedure: 1. While pressing the INPUT button and p button, connect the power plug to the outlet, and release the INPUT button and p button. 2. Press the + button to display "[Service]", and press the ^ "PROGRAM" button. 3. Press the + button to display "lop.Write", and press the ^ "PROGRAM" button. 4. The display becomes "Ref=@@@.@" (@ is an arbitrary number) and the numbers which can be changed will blink. 5. Input the IOP value written on the optical pick-up. To select the number : Press the + button. To select the digit : Press the r "PROGRAM" button. 6. When the ^ "PROGRAM" 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 ^ "PROGRAM" 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 6 "1" button to complete. "Standby" will be displayed. Display Precedure: 1. While pressing the INPUT button and p button, connect the power plug to the outlet, and release the INPUT button and p button. 2. Press the + button to display "[Service]", and press the ^ "PROGRAM" button. 3. Press the + button to display "lop.Read", and press the ^ "PROGRAM" button. 4. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ : indicates the Iop value labeled on the pick-up. ##.# : indicates the Iop value after adjustment 5. To end, press the r "PROGRAM" button or p "PROGRAM" button to display "Iop Read". Then press the 6 "1" buttun. *Note: As this unit has only a few buttons, one button is assigned with several functions in the test mode. Press the INPUT button to switch the functions. Each time the INPUT button is pressed, the display switches in the following order; "PROGRAM" n "1" n blank n "PROGRAM" The functions of each button change with the display. For simplicity, operations of the INPUT button will not be described here. Instead, symbols are added to the names of buttons. Press the INPUT button as required to switch the display. Example) p "PROGRAM" : Display "PROGRAM" and press the p button. p "1" : Display "1" and press the p button.
7
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) · 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 waveform Specified value : Below 10% offset · Error rate check Specified value : For points a, b, and c C1 error : Below 220 AD error : Below 2 · 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
Laser power check (5-6-2 : See page 37)
Traverse check (5-6-3 : See page 37) Focus bias check (5-6-4 : See page 38)
· Replace the optical pick-up · Replace the optical pick-up
C PLAY check (5-6-5 : See page 38)
· Replace the optical pick-up
Self-recording/playback check (REC/PLAY) (5-6-6 : See page 38)
TEMP check (Temperature compensation offset check) (5-6-1 : See page 37)
· Unsatisfactory if displayed as T=@@ (##) [NG" NG (@@, ## are both arbitrary numbers)
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 · 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.
8
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. The line output level and PHONES output level can be varied in the range from 0 dB to -40 dB using the remote commander of this unit. When forced reset is executed, these levels will be set to the initial value of -20 dB. Procedure : 1. Disconnect the power plug from the outlet. 2. Remove the BACK UP board. 3. Insert the power plug into the outlet. 4. Mount the back up board. 5. Press the I/u button. When "Initialize" is displayed, it means that forced reset has been executed. [POWER BOARD] (Component Side)
Back up board
FLUORESCENT DISPLAY TUBE ALL LIGHTING AND KEY CHECK MODE
In this mode, the fluorescent display tube check and key check can be performed. Procedure: 1. While pressing the INPUT button and r (REC) button, insert the power plug into the outlet." 2. The fluorescent display tube displays "FL ALL 10n Key" momentarily and lights up completely." 3. The display goes off partially each time a button is pressed. 4. When all buttons are pressed, "Push INPUT" is displayed. 5. When the INPUT button is pressed, the fluorescent display tube displays "Seg Chk" momentarily and lights up partially. 6. When the INPUT button is pressed, it displays "Rmk Chk" momentarily followed by "Push Rmc Key". If not using a remote commander, end there and disconnect the power plug from the outlet. If using a remote commander, press any button." 7. The check is completed when "Chk End!"is displayed. Press the I/u button to end."
9
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. Precedure: 1. Load a recordable disc whose contents can be erased into the unit. 2. For discs with no disc name, set the name display using the remote commander. (The time display is set after some time. Leave as it is if desired.) 3. Press the p button immediately. Wait for about 10 seconds while pressing the button. (The AMS knob can be pressed instead of the YES button for the same results.) 4. The fluorescent display tube displays "RTs@@c##e**". 5. Press the r button to start recording. Then press the ^ button and start recording. 6. To check the "track mode", press the ^ button to start play. 7. To exit the test mode, press the 1/u button. If the test mode cannot be exited, refer to "Forced Reset" on page 8.
Fig. 1 Reading the Test Mode Display (During recording and stop)
RTs@@c##c** Fluorescent display tube display @@ : Cause of retry ## : Number of retries ** : Number of retry errors
Fig. 2 Reading the Test Mode Display (During playback)
@@####**$$ Fluorescent display tube display @@ ## ** $$ : : : : Parts No. (name of area named on TOC) Cluster } Address (Physical address on disc) Sector Track mode (Track information such as copyright information of each part)
Reading the Retry Cause Display Higher Bits Hexadecimal 8 Bit Binary 0 0 0 0 0 0 0 1 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 Lower Bits 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 1 1 0 0 0 0 0 0 0 Hexadecimal 01 02 04 08 10 20 40 80
Cause of Retry shock ader5
Occurring conditions When track jump (shock) is detected When ADER was counted more than five times continuously When DIN unlock is detected When not in focus When ABCD signal level exceeds the specified range When CLV is unlocked When access operation is not performed normally
b7 b6 b5 b4 b3 b2 b1 b0
Discontinuous address When ADIP address is not continuous DIN unlock FCS incorrect IVR rec error CLV unlock Access fault
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 b2 The retry cause in this case is combined of "access fault", "IVR rec error", and "ader5".
10
Reading the Track Mode Display Higher Bits Hexadecimal 8 Bit Binary 0 0 0 0 0 0 0 1 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 Lower Bits 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 1 1 0 0 0 0 0 0 0 Hexadecimal 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 Write prohibited Invalid Digital copy No copyright Write allowed Emphasis ON Stereo Details When 1
b7 b6 b5 b4 b3 b2 b1 b0
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
11
SECTION 2 GENERAL
Front Panel
This section is extracted from instruction manual.
1
2
3
4
5
11
10
9
8
7
6
Location of Parts and Controls
12
SECTION 3 DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-1. CASE AND FRONT PANEL
2 Two screws (Flat head)
1 Two screws (Flat head) 3 Case
7 Screw (M2 x 6.0)
Claw
5 Screw (BTT M3)
Claw
8 Front panel (Take not of two claws) 9 Flat type wire (CN701) 6 Screw (M2 x 6.0)
4 Two screws (BTT M3)
3-2. MD MECHANISM
0 MD mechanism
8 Two step screws 9 Two step screws
5 Screw (BVTP 3 x 8) 1 Connector 8P (CN503)
2 Flat type wire (CN412) 3 Flat type wire (CN501) 4 Flat type wire (CN421) 7 Main board 6 Screw (BVTP 3 x 8)
13
3-3. SLIDER (CAM)
6 Slider (Cam)
· Note for Installation of Slider (Cam)
Set the shaft of Cam gear to be at the position in the figure.
2 Bracket (Guide L) 1 Two screws (BTP 2.6 x 6)
3 Leaf spring
Set the shaft of Lever (O/C) to be at the position in the figure.
4 Two screws (BTP 2.6 x 6)
5 Bracket (Guide R)
3-4. BASE UNIT (MBU-5A) AND BD BOARD
2 Base unit (MBU-5A) 5 Flexible board (CN104)
6 Flexible board (CN101) 1 Three screws (BTP2.6 x 6)
3 Remove the solder (Five position) 7 BD board 4 Screw (M1.7 x 4)
14
3-5. SW BOARD AND LOADING MOTOR (M103)
1 Screw (PTPWH M2.6 x 6) 2 Gear B 3 Two screws (PWH 1.7 x 3)
4 Loading motor (M103) 6 SW board
5 Three screws (BTP2.6 x 6)
15
SECTION 4 TEST MODE
*Note: As this unit has only a few buttons, one button is assigned with several functions in the test mode." Press the INPUT button to switch the functions. Each time the INPUT button is pressed, the display switches in the following order;" "PROGRAM" n "1" n blank n "PROGRAM" The functions of each button change with the display. Buttons and Corresponding Functions Buttons 1/u 6 (EJECT) ^ = + p (STOP) r (REC) Function when nothing displayed 1/u 6 (EJECT) ^ = (AMS) + (AMS) p (STOP) r (REC) CLEAR ENTER/YES 0 (FR) ) (FF) EDIT/NO PUSH (AMS) DISPLAY SCROLL Function when "PROGRAM" is displayed Function when "1" is displayed TIME REPEAT PLAY MODE
4-1. PRECAUTIONS FOR USE OF TEST MODE
· As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it. Even if the 6 (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 6 (EJECT) button after pressing the p "PROGRAM" button and the rotation of disc is stopped. 4-1-1. Recording laser emission mode and operating buttons · · · · · · Continuous recording mode (CREC MODE) Laser power check mode (LDPWR CHECK) Laser power adjustment mode (LDPWR ADJUST) Traverse (MO) check (EF MO CHECK) Traverse (MO) adjustment (EF MO ADJUST) When pressing the r (REC) button.
4-2. SETTING THE TEST MODE
The following are two methods of entering the test mode. Procedure 1: While pressing the INPUT button and p button, connect the power plug to an outlet, and release the INPUT button and p button. When the test mode is set, "[Check]" will be displayed. Rotating the INPUT button switches between the following four groups; ···Nn Check Nn Adjust Nn Service Nn Develop Nn ···. Procedure 2: While pressing the INPUT button, connect the power plug to the outlet and release the INPUT button. When the test mode is set, "TEMP CHECK" will be displayed. By setting the test mode using this procedure, only the "Check" group of procedure 1 can be executed.
4-3. EXITING THE TEST MODE
Press the p "1" button. The disc is ejected when loaded, and "Standby" display blinks, and the STANDBY state is set.
4-4. BASIC OPERATIONS OF THE TEST MODE
All operations are performed using the = , + button, ^ "PROGRAM" button, and p "PROGRAM" button. The functions of these buttons are as follows.
Function name Function Changes parameters and modes Proceeds onto the next step. Finalizes input. Returns to previous step. Stops operations.
= , + button ^ "PROGRAM" button p "PROGRAM" button
16
4-5. SELECTING THE TEST MODE
There are 27 types of test modes as shown below. The groups can be switched by pressing the = and = buttons. After selecting the group to be used, press the ^ "PROGRAM" button. After setting a certain group, pressing the = and = buttons switches between these modes. Refer to "Group" in the table for details 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 S curve CHECK VERIFY MODE DETRK CHECK TEMP ADJUST LDPWR ADJUST EF MO ADJUST EF CD ADJUST FBIAS ADJUST EEP MODE MANUAL CMD SVDATA READ ERR DP MODE SLED MOVE Inpossible ADJ CLEAR AG Set (MO) AG Set (CD) Iop Read Iop Write INFORMATION CPLAY MODE CREC MODE Contents Temperature compensation offset check 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 No function 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 play mode Continuous recording mode C C C A A C A (X) (X) A A A S S S S S S S S D D (X) (!) (X) (X) S D D (X) (X) (X) 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 p "PROGRAM" button to exit that mode. · Modes with (X) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set accidentally, press the p "PROGRAM" button to exit 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.
17
4-5-1. Operating the Continuous Playback Mode 1. Entering the continuous playback mode 1 Set the disc in the unit. (Whichever recordable discs or discs for playback only are available.) 2 Press the + button and display "CPLAY MODE". 3 Press the ^ "PROGRAM" button to change the display to "CPLAY MID". 4 When access completes, the display changes to "C1 = AD = ". Note : The numbers " " displayed show you error rates and ADER. 2. Changing the parts to be played back 1 Press the ^ "PROGRAM" 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. 2 When access completes, the display changes to "C1 = AD = ". Note : The numbers " " displayed show you error rates and ADER. 3. Ending the continuous playback mode 1 Press the p "PROGRAM" button. The display will change to "CPLAY MODE". 2 Press the 6 (EJECT) button to remove the disc. Note : The playback start addresses for IN, MID, and OUT are as follows. IN 40h cluster MID 300h cluster OUT 700h cluster 4-5-2. 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 Press the + button and display "CREC MODE". 3 Press the ^ "PROGRAM" button to change the display to "CREC MID". 4 When access completes, the display changes to "CREC ( )" and REC lights up. Note : The numbers " " displayed shows you the recording position addresses. 2. Changing the parts to be recorded 1 When the + "PROGRAM" button is pressed during continuous recording, the display changes as below. "REC MID" n "REC OUT" n "REC IN" When pressed another time, the parts to be recorded can be changed. REC goes off. 2 When access completes, the display changes to "CREC ( " and REC lights up. Note : The numbers " " displayed shows you the recording position addresses. 3. Ending the continuous recording mode 1 Press the p "PROGRAM" button. The display changes to "CREC MODE" and REC goes off. 2 Press the 6 (EJECT) button to remove the disc. Note 1 : The recording start addresses for IN, MID, and OUT are as follows. IN 40h cluster MID 300h cluster OUT 700h cluster Note 2 : The p "PROGRAM" button can be used to stop recording anytime. Note 3 : Do not perform continuous recording for long periods of time above 5 minutes. Note 4 : During continuous recording, be careful not to apply vibration. 4-5-3. 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 set accidentally, press the p "PROGRAM" button immediately to exit it.
18
4-6. FUNCTIONS OF OTHER BUTTONS
Function ^ p + "PROGRAM" = "PROGRAM" 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
r "1" ^ "1" p "1"
6 (EJECT) 6 "1"
*
Exits the test mode
*Note: As this unit has only a few buttons, one button is assigned with several functions in the test mode." Press the INPUT button to switch the functions. Each time the INPUT button is pressed, the display switches in the following order;" "PROGRAM" n "1" n blank n "PROGRAM" The functions of each button change with the display.
4-7. TEST MODE DISPLAYS
Each time the p "1" button is pressed, the display changes in the following order. 1. Mode display Displays "TEMP ADJUST", "CPLAYMODE", etc.
Mode display
2. Error rate display Displays the error rate in the following way. C1 = AD = C1 = Indicates the C1 error. AD = Indicates ADER. 3. Address display The address is displayed as follows. (MO:recordable disc, CD:playback only disc) Pressing the r "1" button 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. 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. [ ][ ][
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)
19
MEANINGS OF OTHER DISPLAYS
Display ( P REC SYNC L.SYNC 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
20
SECTION 5 ELECTRICAL ADJUSTMENTS
5-1. PARTS REPLACEMENT AND ADJUSTMENT
· Check and adjust the MDM and MBU 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 sleding 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
21
5-2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSINON
To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight.
5-3. PRECAUTIONS FOR USE OF OPTICAL PICKUP (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 (Parts No. 4-963-646-01) · Test Disk (MDW-74/AU-1) (Parts No. 8-892-341-41) · Laser power meter LPM-8001 (Parts No. J-2501-046-A) or MD Laser power meter 8010S (Parts No. J-2501-145-A) · Oscilloscope (Measure after performing CAL of prove.) · Digital voltmeter · Thermometer · Jig for checking BD board waveform (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) Using the above jig enables the waveform to be checked without the need to solder. (Refer to Servicing Note on page 6.) 7) As the disc used will affect the adjustment results, make sure that no dusts nor fingerprints are attached to it. Note: When performing laser power checks and adjustment (electrical adjustment), use of the new MD laser power meter 8010S (J-2501145-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 the optical pick-up.
laser tap
Optical pick-up flexible board
5-5. CREATING CONTINUOUSLY RECORDED DISC 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.
Optical Pick-up IC171 1. Initial setting of adjustment value 2. Recording of IOP information (Value written in the pick-up) 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
* 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. Press the + button and display "CREC MODE". 3. Press the ^ "PROGRAM" button again to display "CREC MID". Display "CREC (0300)" and start to recording. 4. Complete recording within 5 minutes. 5. Press the p "PROGRAM" button and stop recording . 6. Press the 6 (EJECT) button and remove the disc. The above has been how to create a continuous recorded data for the focus bias adjustment and 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, exit 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.
22
5-6. CHECKS 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). 5-6-1. Temperature Compensation Offset Check When performing adjustments, set the internal temperature and room temperature to 22 to 28°C. Checking Procedure: 1. Press the + button to display "TEMP CHECK". 2. Press the ^ "PROGRAM" 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.) 5-6-2. Laser Power Check Before checking, check the IOP value of the optical pick-up. (Refer to 5-8. Recording and Displaying IOP Information.) Connection :
Laser power meter
Note 1: After step 4, each time the ^ "PROGRAM" button is pressed, the display will be switched between "0.7 mW*** *** $ ". $ ", "6.2 mW*** $ ", and "WP Nothing needs to be performed here. 5-6-3. Traverse Check Connection :
Oscilloscope
BD board CN110 pin 3 (TE) CN110 pin 1 (VC) V : 0.5 V/div H : 10 ms/div Input : DC mode
Optical pick-up objective lens Digital volt meter
Checking Procedure: 1. Connect an oscilloscope to CN110 pin 3 (TE) and CN110 pin 1 (VC) of the BD board. 2. Load a disc (any available on the market). (Refer to Note 1.) 3. Press the + "PROGRAM" button and move the optical pickup outside the pit. 4. Press the + button and display "EF MO CHECK". 5. Press the ^ "PROGRAM" button and display "EFB = MO-R". (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 press the = , + buttons. (Read power traverse checking) (Traverse Waveform)
BD board CN110 pin 5 (I+3V) CN110 pin 4 (IOP)
A VC B
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 = "PROGRAM" button or + "PROGRAM" button to move the optical pick-up.) Connect the digital volt meter to CN110 pin 5 (I+3V) and CN110 pin 4 (IOP). 2. Then, press the + button and display "LDPWR CHECK" . 3. Press the ^ "PROGRAM" button once and display "0.9 mW*** $ ". Check that the reading of the laser power meter become 0.84 to 0.92 mW. (*** means IOP value) 4. Press the ^ "PROGRAM" button once more and display "7.0 mW*** $ ". Check that the reading the laser power meter and digital volt meter satisfy the specified value. Specified Value : Laser power meter reading : 7.0 ± 0.2 mW Digital voltmeter reading : Optical pick-up displayed value ± 10% (Optical pick-up label)
KMS
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
7. Press the ^ "PROGRAM" button and display "EFB = MO-W". 8. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not press the = , + buttons.. (Write power traverse checking) (Traverse Waveform)
A VC B
260A 27X40 B0825
(For details of the method for checking this value, refer to "5-8. Recording and Displaying IOP Information".)
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
Iop = 82.5 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
5. Press the p "PROGRAM" button and display "LDPWR CHECK" and stop the laser emission. (The p "PROGRAM" button is effective at all times to stop the laser emission.)
N
MO9. Press the ^ "PROGRAM" button display "EFB = P". Then, the optical pick-up moves to the pit area automatically and servo is imposed.
23
10. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not press the = , + buttons. (Traverse Waveform)
A VC B
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
11. Press the ^ "PROGRAM" button display "EF MO CHECK" The disc stops rotating automatically. 12. Press the 6 (EJECT) button and remove the disc. 13. Load the check disc (MD) TDYS-1. 14. Press the + button and display "EF CD CHECK". 15. Press the ^ "PROGRAM" button and display "EFB = CD". Servo is imposed automatically. 16. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not press the = , + buttons. (Traverse Waveform)
A VC B
5-6-4. Focus Bias Check Change the focus bias and check the focus tolerance amount. Checking Procedure : 1. Load a test disk (MDW-74/AU-1). 2. Rotate the + button and display "CPLAY MODE". 3. Press the ^ "PROGRAM" button twice and display "CPLAY MID". AD = " 4. Press the p "PROGRAM" button when "C1 = is displayed. 5. Press the + button and display "FBIAS CHECK". 6. Press the ^ "PROGRAM" button and 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 220 and ADER is below 2. 7. Press the ^ "PROGRAM" button and display " / b= ". Check that the C1 error is below 220 and ADER is below 2. 8. Press the ^ "PROGRAM" button and display " / a= ". Check that the C1 error is below 220 and ADER is below 2. 9. Press the p "PROGRAM" button, next press the 6 (EJECT) button, and remove the test disc. 5-6-5. C PLAY Checking MO Error Rate Check Checking Procedure : 1. Press a test disk (MDW-74/AU-1). 2. Rotate the + button knob and display "CPLAY MODE" . 3. Press the ^ "PROGRAM" button and display "CPLAY MID". AD = ". 4. The display changes to "C1 = 5. If the C1 error rate is below 80, check that ADER is below 2. 6. Press the p "PROGRAM" button, stop playback, press the 6 (EJECT) button, and test disc. CD Error Rate Check Checking Procedure : 1. Load a check disc (MD) TDYS-1. 2. Press the + button knob and display "CPLAY MODE". 3. Press the ^ "PROGRAM" button and display "CPLAY MID". 4. The display changes to "C1 = AD = ". 5. Check that the C1 error rate is below 50. 6. Press the p "PROGRAM" button, stop playback, press the 6 (EJECT) button, and the test disc. 5-6-6. Self-Recording/playback Check Prepare a continuous recording disc using the unit to be repaired and check the error rate. Checking Procedure : 1. Insert a recordable disc (blank disc) into the unit. 2. Press the + button knob to display "CREC MODE". 3. Press the ^ "PROGRAM" button to display the "CREC MID". 4. When recording starts, " REC " is displayed, this becomes "CREC (@@@@)" (@@@@ is the address), and recording starts. 5. About 1 minute later, press the p "PROGRAM" button to stop continuous recording. 6. Press the = button to display "C PLAY MODE". 7. Press the ^ "PROGRAM" button to display "C PLAY MID". 8. "C1 = AD = " will be displayed. 9. Check that the C1 error becomes below 80 and the AD error below 2. 10. Press the p "PROGRAM" button to stop playback, and press the 6 (EJECT) button and remove the disc.
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
17. Press the ^ "PROGRAM" button and display "EF CD CHECK". 18. Press the 6 (EJECT) button and remove the check disc (MD) TDYS-1. Note 1 : MO reading data will be erased during 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
BD board CN110 pin 3 (TE) CN110 pin 1 (VC)
330 k 10pF
24
5-7. 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 "5-4. Precautions on Adjustments" and execute the initial setting before the adjustment as required. Setting Procedure : 1. Press the + button to display "ADJ CLEAR". 2. Press the ^ "PROGRAM" button. "Complete!" will be displayed momentarily and initial setting will be executed, after which "ADJ CLEAR" will be displayed.
5-9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT
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. Adjusting Procedure : 1. Press the + button and display "TEMP ADJUST". 2. Press the ^ "PROGRAM" button and select the "TEMP ADJUST" mode. 3. "TEMP = [OK]" and the current temperature data will be displayed. 4. To save the data, press the ^ "PROGRAM" button. When not saving the data, press the p "PROGRAM" button. 5. When the ^ "PROGRAM" button is pressed, "TEMP = SAVE" will be displayed and turned back to "TEMP ADJUST" display then. When the p "PROGRAM" button is pressed, "TEMP ADJUST" will be displayed immediatelly. Specified Value : " should be within "E0 - EF", "F0 - FF", "00 The "TEMP = 0F", "10 - 1F" and "20 - 2F".
5-8. RECORDING AND DISPLAYING THE IOP INFORMATION
The IOP data can be recorded in the non-volatile memory. The IOP value on the label of the optical pickup 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. While pressing the INPUT button and p button, connect the power plug to the outlet, and release the INPUT button and p button. 2. Press the + button to display "[Service]", and press the ^ "PROGRAM" button. 3. Rotate the + button to display "Iop.Write", and press the ^ "PROGRAM" button. 4. The display becomes Ref=@@@.@ (@ is an arbitrary number) and the numbers which can be changed will blink. 5. Input the IOP value written on the optical pick-up. To select the number : Press the = , + buttons. To select the digit : Press the r "PROGRAM" knob 6. When the ^ "PROGRAM" 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 ^ "PROGRAM" button. 8. "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. Press the + button to display "Iop.Read". 2. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ indicates the Iop value labeled on the pick-up. ##.# indicates the Iop value after adjustment 3. To end, press the r "PROGRAM" button or p "PROGRAM" button to display "Iop Read".
5-10. LASER POWER ADJUSTMENT
Check the IOP value of the optical pick-up before adjustments. (Refer to 5-8. Recording and Displaying IOP Information.) Connection :
Laser power meter
Optical pick-up objective lens Digital volt meter
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 = "PROGRAM" button or + "PROGRAM" button to move the optical pick-up.) Connect the digital volt meter to CN110 pin 5 (I+3V) and CN110 pin 4 (IOP). 2. Press the + button and display "LDPWR ADJUST". (Laser power : For adjustment) 3. Press the ^ "PROGRAM" button once and display "LD 0.9 mW $ ". 4. Press the = , + buttons so that the reading of the laser power meter becomes 0.85 to 0.91 mW. Press the ^ "PROGRAM" 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.
25
6. Press the = , + buttons so that the reading of the laser power meter becomes 6.9 to 7.1 mW, press the ^ "PROGRAM" button and save it. Note : Do not perform the emission with 7.0 mW more than 15 seconds continuously. 7. Then, press the + button and display "PWR CHECK". 8. Press the ^ "PROGRAM" button once and display "0.9 mW*** $ ". Check that the reading of the laser power meter become 0.85 to 0.91 mW. (*** means IOP value) 9. Press the ^ "PROGRAM" button once more and display "7.0 mW*** $ ". Check that the reading the laser power meter and digital volt meter satisfy the specified value. Note down the digital voltmeter reading value. Specified Value : Laser power meter reading : 7.0 ± 0.1 mW Digital voltmeter reading : Optical pick-up displayed value ± 10% (Optical pick-up label)
KMS
5-11. TRAVERSE ADJUSTMENT
Connection :
Oscilloscope
BD board CN110 pin 3 (TE) CN110 pin 1 (VC) V : 0.5 V/div H : 10 ms/div Input : DC mode
260A 27X40 B0825
(For details of the method for checking this value, refer to "5-8. Recording and Displaying IOP Information".)
Iop = 82.5 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
10. Press the p "PROGRAM" button and display "LDPWR CHECK" and stop the laser emission. (The p "PROGRAM" button is effective at all times to stop the laser emission.) 11. Press the + button to display "Iop.Write". 12. Press the ^ "PROGRAM" button. When the display becomes Ref=@@@.@ (@ is an arbitrary number), press the ^ "PROGRAM" 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 : Press the = , + buttons. To select the digit : Press the r "PROGRAM" buttan 14. When the ^ "PROGRAM" button is pressed, "Complete!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write". Note 1: After step 4, each time the ^ "PROGRAM" button is pressed, the display will be switched between "0.7 mW*** $ ", "6.2 mW*** $ ", and " WP *** $ ". Nothing needs to be performed here.
Adjusting Procedure : 1. Connect an oscilloscope to CN110 pin 3 (TE) and CN110 pin 1 (VC) of the BD board. 2. Load a disc (any available on the market). (Refer to Note 1.) 3. Press the + "PROGRAM" button and move the optical pickup outside the pit. 4. Press the + button and display "EF MO ADJUST". 5. Press the + button and display "EFB = MO-R". (Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON) 6. Press the + button so that the waveform of the oscilloscope becomes the specified value. (When the = , + buttons is pressed, the of "EFB= " 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)
N
A VC B
Specification A = B
7. Press the ^ "PROGRAM" button and save the result of adjustment to the non-volatile memory ("EFB = SAVE" will be displayed for a moment. Then "EFB = MO-W" will be displayed). 8. Press the = , + buttons so that the waveform of the oscilloscope becomes the specified value. (When the = , + buttons is pressed, the of "EFB- " 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)
A VC B
Specification A = B
9. Press the ^ "PROGRAM" button, and save the adjustment SAVE" will be results in the non-volatile memory. ("EFB = 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.
26
11. Press the = , + buttons 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
5-12. FOCUS BIAS ADJUSTMENT
Adjusting Procedure : 1. Load a test disk (MDW-74/AU-1). 2. Press the + button and display "CPLAY MODE". 3. Press the ^ "PROGRAM" button and display "CPLAY MID". AD = " 4. Press the p "PROGRAM" button when "C1 = is displayed. 5. Press the + button and display "FBIAS ADJUST". 6. Press the p "PROGRAM" button and display " / a= ". 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. Press the + button and find the focus bias value at which the C1 error rate becomes about 200 (Refer to Note 2). 8. Press the ^ "PROGRAM" button and display " / b= ". 9. Press the = button direction and find the focus bias value at which the C1 error rate becomes about 200. 10. Press the ^ "PROGRAM" button and display " / c= ". 11. Check that the C1 error rate is below 50 and ADER is 00. Then press the ^ "PROGRAM" button. 12. If the "( )" in " ( )" is above 20, press the p "PROGRAM" button. If below 20, press the p "PROGRAM" button and repeat the adjustment from step 2. 13. Press the 6 (EJECT) button to remove the test 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.
C1 error
Specification A = B
12. Press the ^ "PROGRAM" button, and save the adjustment results in the non-volatile memory. ("EFB = SAVE" will be displayed for a moment.) Next "EF MO ADJUST" is displayed. The disc stops rotating automatically. 13. Press the 6 (EJECT) button and remove the disc. 14. Load the check disc (MD) TDYS-1. 15. Press + button and display "EF CD ADJUST". 16. Press the ^ "PROGRAM" button and display "EFB = CD". Servo is imposed automatically. 17. Press the = , + buttons 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
about 200
18. Press the ^ "PROGRAM" button, display "EFB = SAVE" for a moment and save the adjustment results in the non-volatile memory. Next "EF CD ADJUST" will be displayed. 19. Press the 6 (EJECT) button and remove the check disc (MD) TDYS-1. Note 1 : MO reading data will be erased during 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
b
c
a
Focus bias value (F. BIAS)
BD board CN110 pin 3 (TE) CN110 pin 1 (VC)
330 k 10pF
27
5-13. ERROR RATE CHECK
5-13-1. CD Error Rate Check Checking Procedure : 1. Load a check disc (MD) TDYS-1. 2. Press the + button and display "CPLAY MODE". 3. Press the ^ "PROGRAM" button twice and display "CPLAY MID". AD = ". 4. The display changes to "C1 = 5. Check that the C1 error rate is below 20. 6. Press the p "PROGRAM" button, stop playback, press the 6 (EJECT) button, and remove the test disc. 5-13-2. MO Error Rate Check Checking Procedure : 1. Load a test disc (MDW-74/AU-1). 2. Press the + button and display "CPLAY MODE". 3. Press the ^ "PROGRAM" button and display "CPLAY MID". 4. The display changes to "C = AD = ". 5. If the C1 error rate is below 50, check that ADER is 00. 6. Press the p "PROGRAM" button, stop playback, press the 6 (EJECT) button, and remove the test disc.
5-15. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT
Be sure to perform this adjustment when the pickup is replaced. If the adjustment results becomes "Adjust NG!", the pickup may be faulty or the servo system circuits may be abnormal. 5-15-1. CD Auto Gain Control Output Level Adjustment Adjusting Procedure : 1. Insert the check disc (MD) TDYS-1. 2. Press the + button to display "AG Set (CD)". 3. When the ^ "PROGRAM" 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 6 (EJECT) button to remove the disc. 5-15-2. MO Auto Gain Control Output Level Adjustment Adjusting Procedure : 1. Insert the reference disc (MDW-74/AU-1) for recording. 2. Press the + button to display "AG Set (MO)". 3. When the ^ "PROGRAM" 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 6 (EJECT) button to remove the disc.
5-14. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount. Checking Procedure : 1. Load a test disc (MDW-74/AU-1). 2. Press the + button and display "CPLAY MODE". 3. Press the ^ "PROGRAM" button twice and display "CPLAY MID". 4. Press the p "PROGRAM" button when "C1 = AD = " is displayed. 5. Press the + button and display "FBIAS CHECK". 6. Press the ^ "PROGRAM" button and 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 ^ "PROGRAM" button and display " / b= ". Check that the C1 error is below 220 and ADER is below 2. / a= 8. Press the ^ "PROGRAM" button and display " ". Check that the C1 error is below 220 and ADER is below 2 9. Press the p "PROGRAM" button, next press the 6 (EJECT) button, and remove the continuously recorded 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.
28
5-15. ADJUSTING POINTS AND CONNECTING POINTS
[BD BOARD] (SIDE A)
CN101 D101
CN110
GND I+3V IOP TE 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 Note on page 6.)
29
SECTION 6 DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION
Back up board
SW board BD board
Power board Main board Panel board
30
MDS-PC2
6-2. BLOCK DIAGRAM BD SECTION
OVER WRITE HEAD DRIVE IC181
DIGITAL SERVO SIGNAL PROCESSOR, DIGITAL SIGNAL PROCESSOR EFM/ACIRC ENCODER/DECODER, SHOCK-PROOF MEMORY CONTROLLER, ATRAC ENCODER/DECODER IC121 SCTX XINIT
XINIT
FILTER
· SIGNAL PATH :PB :REC :PB (Digital out) :REC (Digital in)
OPTICAL PICK-UP BLOCK (KMS-260A/J1N)
HEAD DRIVE Q181,182
8 · 11
TX
HR901 OVER WRITE HEAD
9 · 12 10 · 13 4 5
15
14 DIN0 DIN1 ADDT 19 20 25 DIN0 DIN1 ADDT
3
1 2
100
EFMO
6
48 47 46 40
RF AMP IC101
59 60 61 62
PCO FILI FILO CLTV
PLL
EFM, ACIRC, ENCODER/ DECODER
SHOCK RESISTANT MEMORY CONTROLLER
ATRAC ENCODER/ DECODER
DIGITAL AUDIO I/F
DADT RFI DOUT XBCK LRCK OSCI
MORFO MORFI RFO AGCI
26 21 28 27 16 7 BUFFER IC123 3
DADT DOUT BCK LRCK 512FS
RF AGC & EQ
RF
38
57
DETECTOR F I C B D A E J
I 1 J 2
RF AMP
BPF
P-P PEAK & BOTTOM
AUX
33
67
AUX1
SAMPLING RATE CONVERTER
CLOCK GENERATOR
BOTM 36 PEAK 37 ABCD
BOTM 64 PEAK 63 ABCD ANALOG MUX
4 5 6 7 8 9
A B C D E F
ABCD AMP IV AMP FOCUS ERROR AMP AT AMP
35
65
SUBCODE PROCESSOR
SQSY DQSY MNT3 MNT2 MNT1 MNT0 SENS SRDT SCLK SWDT XLAT
11 12 4 3 2 1 9 8 6 5 7 DRAM IC124
SQSY DQSY MNT3 MNT2 MNT1 MNT0 SENS SRDT SCLK SWDT XLAT CH
FE ADAGC
34 VC 31 VC
IV AMP
FE 66 VC 68 TE 75 SE 74 A/D CONVERTER
MONITOR CONTROL
E-F BALANCE VC VC 3 15 D101 14 LASER ON SW Q101 TEMPI TEMP AMP VC TEMPR CVB VCC
29 BPF ADFM ADIN ADFG 30 32
78
ADFG
ADIP DEMODULATOR/ DECODER
APC
SERVO DSP
CPU I/F
MAIN SECTION
TRACKING ERROR AMP
TE SE CSLED
26 28 27 VC 82 81 80 DTRF CKRF XLRF
(Page 32)
SPINDLE SERVO
PWM GENERATOR
3 20
AUTO SEQUENCER XWE 47 XRAS 46 XCAS 44 XOE 43 3 4 17 16 1 · 2 · 18 · 19 6 9 · 11 15 · 5
PD
10
PD VICONV
SERIAL PARALLEL DECODER
SWDT
16 SCLK 17 XLAT 18
APCREF
EQADJ 3TADJ
WBLADJ
XWE XRAS XCAS XOE DQ1
APC
SPRD
FG IN
SPFD
XRST
20
79
RECP
FOCNT
FOCNT
APCREF FFDR FRDR TFDR TRDR SFDR SRDR
11 ILCC APC Q162,163
12
22 23 25
93
94
95
10
13
83 88 89 86 85 92 91
D0 D3 49 · 48 · 50 · 51
A00
A09
34 31 · 36 40 · 45
DQ4 A0
LD
A9 LDON
HF MODULE TRACKING COIL
HF MODULE SW IC103,Q102-104 SLED/SPINDLE MOTOR DRIVE FOCUS/TRACKING COIL DRIVE IC152 TRK TRK+ FSC+ FSC TFDR TRDR FRDR FFDR SFDR SRDR SPFD SPRD DETECT SW S101, S102, S601-604
WRPWR MOD SDA SCL 5 6 SDA SCL LIMIT-IN REFLECT PROTECT CHACK IN SW PACK OUT SW PLAY-P SW REC P SW
EEP ROM IC171
FOCUS COIL
10 12 21 23 27 25 6 8
DRIVER
14 15 18 19 29 30 3 4
DRIVER
M102 SLED MOTOR M101 SPINDLE MOTOR
M
SLED+ SLED SPDL+ SPDL
DRIVER
M
DRIVER
M103 LOADING MOTOR
M
LOAD-IN LOAD-OUT
PSB 09
16
XRST
DIG-RST
31
31
MDS-PC2
MAIN SECTION
IC601 10 11 3 OPT IN 1 IC611 OPT IN 2 3 3 IC621 OPT OUT 1 IC661 VOUTL 26 VOUTR 24 R-CH 16 BCK 17 WS 19 DATAI IC351 3 5 IC351 6 2 12 SYSCLK DIGITAL (OPTICAL) 18 DATAO VINL1 2 VINR1 4 R-CH LINE AMP IC381, 382 + MUTE Q191 R-CH R-CH A/D,D/A CONVERTER IC301
J101 L IN R J101 LINE (ANALOG) OUT R
IC601 DIN0 DIN1 DOUT ADDT BCK LRCK DADT 4
L
L3MODE 13 L3CLK 14 L3DATA 15
MUTE DRIVE Q390
512FS
X351 22.5792MHz TXDI SYSTEM CONTROL IC501 RTSI CLKI 8 7 5 4
BD SECTION
SCTX XINT SQSY DQSY MNT3 MNT2 MNT1 MNT0 SENS SRDT SCLK SWDT XLATCH LIMIT-IN REFLECT PROTECT CHACKIN S