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COMPACT DISC DECK RECEIVER
Service Manual
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SERVICE MANUAL
Ver 1.1 2001. 06
HCD-MDX10
US Model Canadian Model AEP Model UK Model E Model Australian Model
HCD-MDX10 is the tuner, deck, CD, MD and amplifier section in MHC-MDX10.
Model Name Using Similar Mechanism NEW CD SECTION Mechanism Type Base Unit Type Optical Pick-up Type MD SECTION CDM38LH-5BD32L BU-5BD32L KSS-213D/Q-NP
Model Name Using Similar Mechanism MDS-JE520 Mechanism Type Optical Pick-up Type TAPE DECK SECTION Tape Transport Mechanism Type MDM-5A KMS-260A/K1NP
Model Name Using Similar Mechanism HCD-DR4/DR5/DR6/DR440/ W300/W5000/XB500 TCM-230AWR2/230PWR2
SPECIFICATIONS
-- Continued on next page --
COMP ACT DISC DECK RECEIVER
9-928-878-12
2001F0200-1 © 2001.6
Sony Corporation
Home Audio Company Shinagawa Tec Service Manual Production Group
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SELF-DIAGNOSIS FUNCTION
The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes which show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box in the instruction manual. For details on how to check error codes during servicing, refer to the following "Procedure for using the SelfDiagnosis Function (Error History Display Mode)".
Procedure for using the Self-Diagnosis Function (Error History Display Mode). Note: Perform the self-diagnosis function in the "error history display mode" in the test mode. The following describes the least required procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the MENU/NO button to exit the mode. 1. 2. 3. 4. 5. 6. 7. 8. 9. With the power ON, press the CD-MD SYNC button while pressing the p and ENTER/YES buttons together. Rotate the AMS dial and when "Service" is displayed, press the YES button. Rotate the AMS dial and display "ERR DP MODE". Pressing the ENTER/YES button sets the error history mode and displays "total rec". Select the contents to be displayed or executed using the AMS dial. Pressing the MD WALKMAN SYNC button will display or execute the contents selected. Pressing the MD WALKMAN SYNC button another time returns to step 4. Pressing the MENU/NO button displays "ERROR DP MODE" and exits the error history mode. To exit the test mode, press the REPEAT/STEREO/MONO button.
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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 rotating the AMS dial. 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 MD WALKMAN SYNC button and "er refresh?" is displayed, press the ENTER/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 pickup. If the optical pickup has been replaced, perform this operation and erase the history. After pressing the ENTER/AMS button and "tm refresh?" is displayed, press the MD WALKMAN SYNC 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)
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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.
MODEL IDENTIFICATION -- BACK PANEL --
Parts No.
PARTS No. 4-216-211-0 4-216-211-1 4-216-211-2
MODEL AEP, UK, G, CIS E, SP, MY, HK, AR US, CND, KR, AUS
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.
· Abbreviation CND : Canadian model G : German model SP : Singapore model MY : Malaysia model HK : Hong Kong model AR : Argentine model KR : Korea model AUS : Australian model
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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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)
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 pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens. LASER DIODE AND FOCUS SEARCH OPERATION CHECK Carry out the "S curve check" in "CD section adjustment" and check that the S curve waveform is output four times.
To Exposed Metal Parts on Set
0.15µF
1.5k
AC voltmeter (0.75V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
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TABLE OF CONTENTS 1. SERVICING NOTE .......................................................... 8 2. GENERAL ........................................................................ 14 3. DISASSEMBLY
3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. Loading Panel ..................................................................... 16 MD Mechanism and Front Panel ........................................ 16 Cassette Lid and Tape Mechanism ...................................... 17 MD Link, Power SW, CD Panel Boards and Display Board ..................................................................... 17 Disc Tray ............................................................................. 18 Slider (CAM) ...................................................................... 18 Base Unit (MBU-5A) and BD (MD) Board ....................... 19 SW Board and Loading Motor (M103) .............................. 19
9. EXPLODED VIEWS
9-1. Case Section ...................................................................... 119 9-2. Chassis Section ................................................................. 120 9-3. Front Panel Section ........................................................... 121 9-4. CD Mechanism Deck Section-1 (CDM38LH-5BD32L) .. 122 9-5. CD Mechanism Deck Section-2 (CDM38LH-5BD32L) .. 123 9-6. Base Unit Section (BU-5BD32L) ..................................... 124 9-7. TC Mechanism Section-1 (TCM230AWR2/230PWR2) .. 125 9-8. TC Mechanism Section-2 (TCM230AWR2/230PWR2) .. 126 9-9. MD Mechanism Section-1 (MDM-5A) ............................ 127 9-10. MD Mechanism Section-2 (MDM-5A) .......................... 128
10. ELECTRICAL PARTS LIST ............................... 129
4. SERVICE MODE ............................................................ 20 5. TEST MODE (MD) ......................................................... 22 6. MECHANICAL ADJUSTMENTS .......................... 26 7. ELECTRICAL ADJUSTMENTS ............................... 27 8. DIAGRAMS
8-1. Circuit Boards Location ...................................................... 40 8-2. Block Diagrams · BD (CD) Section .............................................................. 41 · BD (MD) Section (1) ....................................................... 43 · BD (MD) Section (2) ....................................................... 45 · Main Section .................................................................... 47 · Deck Section .................................................................... 49 · Display Section ................................................................ 51 · Main Power/Sub Power Section ...................................... 53 8-3. Printed Wiring Board BD (CD) Section ....................... 57 8-4. Schematic Diagram BD (CD) Section .......................... 59 8-5. Printed Wiring Board BD (MD) Section ...................... 61 8-6. Schematic Diagram BD (MD) (1/2) Section ................ 63 8-7. Schematic Diagram BD (MD) (2/2) Section ................ 65 8-8. Schematic Diagram Main (1/4) Section ........................ 67 8-9. Schematic Diagram Main (2/4) Section ........................ 69 8-10. Schematic Diagram Main (3/4) Section ..................... 71 8-11. Schematic Diagram Main (4/4) Section ..................... 73 8-12. Printed Wiring Board Main Section ........................... 75 8-13. Printed Wiring Board Deck Section ........................... 77 8-14. Schematic Diagram Deck Section .............................. 79 8-15. Printed Wiring Board Leaf SW Section ..................... 81 8-16. Schematic Diagram Leaf SW Section ........................ 81 8-17. Schematic Diagram Display (1/2) Section ................. 83 8-18. Schematic Diagram Display (2/2) Section ................. 85 8-19. Printed Wiring Board Display Section ....................... 87 8-20. Printed Wiring Board MD Digital Section ................. 89 8-21. Schematic Diagram MD Digital (1/2) Section ........... 91 8-22. PSchematic Diagram MD Digital (2/2) Section ......... 93 8-23. Schematic Diagram BD Switch Section ..................... 95 8-24. Printed Wiring Board BD Switch Section .................. 96 8-25. Printed Wiring Board CD Motor Section ................... 97 8-26. Schematic Diagram CD Motor Section ...................... 99 8-27. Printed Wiring Board MD Link Section ................... 101 8-28. Schematic Diagram MD Link Section ..................... 103 8-29. Schematic Diagram Power Section .......................... 105 8-30. Printed Wiring Board Power Section ....................... 107 8-31. IC Block Diagrams ......................................................... 109 8-32. IC Pin Functions ............................................................. 112
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SECTION 1 SERVICING NOTE
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF
1 Remove the Case.
3 Pull-out the disc tray. 2 Turn the cam to the direction of arrow.
NOTE FOR INSTALLATION (ROTARY ENCODER)
Note:When attaching the Base unit, Insert the section A into the groove of BU cam.
BU cam
Section A Groove
Note:When attaching the BU cam, engage the Rotary encoder switch as shown in the figure.
CD-TEXT This unit is provided with a simple CD-TEXT display function. The CD-TEXT contents of 50 tracks are displayed on the fluorescent display tube. Since the function is simple, some special characters may not be displayed, or may be displayed as other characters.
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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 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
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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 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. With the power ON, press the CD-MD SYNC button while pressing the p and ENTER/YES buttons together. 2. Rotate the AMS dial to display "Service", and press the ENTER/YES button. 3. Rotate the AMS dial to display "lop.Write", and press the ENTER/YES button. 4. The display becomes "Ref=@@@.@" (@ is an arbitrary number) and the numbers which can be changed will blink. 5. Input the IOP value written on the optical pick-up. To select the number : Rotate the AMS dial. To select the digit : Press the MD WALKMAN SYNC button. 6. When the ENTER/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 ENTER/YES button. 8. "Complete!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write". 9. Press the REPEAT/STEREO/MONO button to complete. Display Precedure: 1. With the power ON, press the CD-MD SYNC button while pressing the p and ENTER/YES buttons together. 2. Rotate the AMS dial to display "Service", and press the YES button. 3. Rotate the AMS dial to display "lop.Read". 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 MD WALKMAN SYNC button or MENU/NO button to display "Iop Read". Then press the REPEAT/STEREO/ MONO button.
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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) · 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 (7-6-2 : See page 29)
Traverse check (7-6-3 : See page 29) Focus bias check (7-6-4 : See page 30)
· Replace the optical pick-up · Replace the optical pick-up
C PLAY check (7-6-5 : See page 30)
· Replace the optical pick-up
Self-recording/playback check (REC/PLAY) (7-6-6 : See page 30)
TEMP check (Temperature compensation offset check) (7-6-1 : See page 29)
· 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.
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 both edge of BT921. [MAIN BOARD] (Component Side)
IC801
BT921
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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. Precedure: 1. Load a recordable disc whose contents can be erased into the unit. 2. Press the FUNCTION button and set the function to "MD". 3. Press the MENU/NO button. When "Edit/Menu" is displayed on the fluorescent indicator tube, rotate the AMS dial to display "All Erase?". 4. Press the ENTER/YES button. 5. "All Erase??" is displayed on the fluorescent indicator tube. 6. Press the ENTER/YES button to display "Complete!!", and press the p button immediately. Wait for about 10 seconds while pressing the button. 7. When the "TOC" displayed on the fluorescent display tube goes off, release the p button. 8. Press the REC (MD) button to start recording. Then press the ^/MD button and start recording. 9. To check the "track mode", press the ^/MD button to start play. 10. To exit the test mode, press the 1/u button, and turn OFF the power. When "TOC" disappears, disconnect the power plug from the outlet. If the test mode cannot be exited, refer to "Forced Reset" on page 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".
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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
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SECTION 2 GENERAL
Front Panel
1
2
3
4
5
6 7
8
9
10
11
12 64 13 14 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 29 26 27 28 30 31 32 41 40 33 34 35 15 16 17 18 19 20 25 21 22 23 24
44 43 42
39
38
37
36
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LOCATION OF PARTS AND CONTROLS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 1/u (POWER) button and indicator REC button and indicator REC IT button CD-MD SYNC button DISC SKIP/EX-CHANGE button DISC 1 button and indicator DISC 2 button and indicator DISC 3 button and indicator Disk compartment § (Eject) (MD) button MD WALKMAN SYNC button § (Eject) (CD) button MD WALKMAN LINK jack Disc tray SYNC BASS HIGH indicator SYNC BASS LOW indicator p button ^/CD button and indicator ^/MD button and indicator TUNER/BAND button and indicator CD NON-STOP button and indicator KARAOKE PON/MPX button SYNC EQ button 24 SYNC BASS button 25 REC PAUSE/START button and indicator 26 DBFB button 27 GROOVE button 28 SURROND button 29 HI DUB button 30 CD-TAPE SYNC button 31 VOLUME knob 32 PHONES jack 33 ENTER/YES button and indicator 34 ) + button and indicator 35 NAME EDIT/CHAR button 36 JOG/0x) dial and indicator 37 MENU/NO button 38 ) button and indicator 39 CLEAR button 40 CD FLASH button 41 CD LOOP button 42 MIX MIC jack 43 TIMER SELECT button and indicator 44 CLOCK/TIMER SET button 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 MIC LEVEL knob SPECTRUM ANALYZER button DISPLAY button REPEAT STEREO/MONO button DOLBY NR/PLAY MODE/PTY button DIRECTION/EDIT/TUNER MEMORY button P FILE MEMORY button GEQ CONTROL button FILE SELECT button EFFECT button FUNCTION button and indicator 9/TAPE B button and indicator (/TAPE B button and indicator 9/TAPE A button and indicator (/TAPE A button and indicator Remote sensor SYNC EQ indicator EFFECT indicator Display Window POWER SAVE/DEMO (STANDBY) button
This section is extracted from instruction manual.
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SECTION 3 DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-1. LOADING PANEL
Claws
3 Loading panel
2 Pull-out the disc tray.
1 Turn the cam to the direction of arrow.
3-2. MD MECHANISM AND FRONT PANEL
7 Four step screws
6 Connector (CN601) 4 Flat type wire (CN102)
8 MD mechanism 3 Wire ! Flat type wire (CN303) !¢ Flat type wire (CN304)
5 Flat type wire (CN103) 1 Four screws (BVTP 3x8)
!TM Screw (BVTP 3x10)
2 Bracket (MDM) !§ Front panel !¡ Screw (BVTP 3x10)
!£ Flat type wire (CN501) 0 Two screws (BVTT3x6) 9 Screw (BVTT3x6)
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3-3. CASSETTE LID AND TAPE MECHANISM
9 Tape mechanism
8 Three screws (BVTP2.6x8)
7 Two screws (BVTP2.6x8)
3 Cassette lid (R) block 4 Cassette lidr (L) block
Note for installation
2 Releas 6 Spring (L)
Portion B Portion B Portion A
5 Spring (R) 1 Release
Portion A
3-4. MD LINK, POWER SW, CD PANEL BOARDS AND DISPLAY BOARD
4 Power SW board (Two claws) 5 CD Panel board (Two claws)
1 Four screws (BVTP2.6x8) 2 Four screws (BVTP2.6x8) 0 Flat type wire (CN601)
3 MD link SW board (Three claws) !¡ Three screws (BVTP2.6x8)
6 Knob (Jog) 8 Nut !TM Four screws (BVTP2.6x8)
9 Nut 7 Knob (Vol) !¢ Display board
!£ Six screws (BVTP2.6x8)
17
3-5. DISC TRAY
(Perform after removing the front panel.) Note:When installing the Disc tray, pull around the flat type wire to pass through the claw A and claw B, as shown in the figure.
3 Flat type wire (8 core)
4 Two claws
2 Pull-out the disc tray. 5 Remove the disc tray.
Claw B Claw A
1 Turn the cam the direction of arrow.
3-6. SLIDER (CAM)
6 Slider (Cam)
Set the shaft of Cam gear to be at the position in the figure.
2 Bracket (Guide L) 1 Two screws (BTP2.6x6)
3 Leaf spring
Set the shaft of Lever (O/C) to be at the position in the figure.
4 Two screws (BTP2.6x6)
5 Bracket (Guide R)
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3-7. BASE UNIT (MBU-5A) AND BD (MD) BOARD
2 Base unit (MBU-5A) 5 Flexible board (CN104)
6 Flexible board (CN101) 1 Three screws (BTP2.6x6)
3 Remove the solder (Five portion) 7 BD (MD) board 4 Screw (M1.7x4)
3-8. SW BOARD AND LOADING MOTOR (M103)
1 Screw (PTPWH M2.6x6) 2 Gear B 3 Two screws (PWH1.7x3)
4 Loading motor (M103) 6 SW board
5 Two screws (BTP2.6x6)
19
SECTION 4 SERVICE MODE
MC Cold Reset · The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer. Procedure: 1. Press three buttons p , ENTER/YES , and 1/u simultaneously. 2. "COLD RESET" is displayed on the fluorescent display tube and reset is executed. CD Delivery Mode · This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair. Procedure: 1. Press 1/u button to turn the set ON. 2. Press CD LOOP button and 1/u button simultaneously. 3. A message "LOCK" is displayed on the fluorescent indicator tube, and the CD delivery mode is set. MC Hot Reset · This mode resets the set with the preset data kept stored in the memory. The hot reset mode functions same as if the power cord is plugged in and out. Procedure: 1. Press three buttons p , ENTER/YES , and DISC 1 simultaneously. 2. The fluorescent indicator tube becomes blank instantaneously, and the set is reset. Sled Servo Mode · This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pick-up. Procedure: 1. Press 1/u button to turn the set ON. 2. Press three buttons p , ENTER/YES , and § (CD) simultaneously. 3. The Sled Servo mode is selected, if "CD" is blanking on the fluorescent indicator tube. 4. With the CD in stop status, When the AMS ± knob is rotated in the clockwise direction, the optical pick-up moves outside. When rotated counterclockwise, it moves inside. 5. To exit from this mode, perform as follows: 1) Move the optical pick-up to the most inside track. 2) Execute MC cold reset. (Press the three buttons p , ENTER/YES , and 1/u button simultaneously.) Note: · Always move the pick-up to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded. · Do not run the sled motor excessively, otherwise the gear can be chipped. Change-over of AM Tuner Step between 9kHz and 10kHz · A step of AM channels can be changed over between 9kHz and 10kHz. Procedure: 1. Press 1/u button to turn the set ON. 2. Select the function "TUNER", and press TUNER/BAND button to select the BAND "AM". 3. Press 1/u button to turn the set OFF. 4. Press ENTER/YES and 1/u buttons simultaneously, and the display of fluorescent indicator tube changes to "AM 9k STEP" or "AM 10k STEP", and thus the channel step is changed over. LED and Fluorescent Indicator Tube All Lit, Key Check Mode Procedure: 1. Press three buttons p , ENTER/YES , and DISC 2 simultaneously. 2. LEDs and fluorescent indicator tube are all turned on. Press DISC 2 button, and the key check mode is activated. 3. In the key check mode, the fluorescent indicator tube displays "K 0 V0 J0". Each time a button is pressed, "K"value increases. However, once a button is pressed, it is no longer taken into account. "J" Value increases like 1, 2, 3 ... if rotating AMS ± knob in "+" direction, or it decreases like 0, 9, 8 ... if rotating in "-" direction. "V" Value increases like 1, 2, 3 ... if rotating VOLUME knob in "+" direction, or it decreases like 0, 9, 8 ... if rotating in "-" direction. 4. To exit from this mode, press three buttons in the same manner as step 1, or disconnect the power cord.
20
AMS Test Mode · This mode is used for checking the AMS operations of the tape deck. JIG 7-819-039-12 Alignment tape, AMS-110A Procedure: 1. Press the 1/u button to turn the unit ON. 2. Set the tape (AMS-110A). 3. Press the three buttons p , ENTER/YES , and DISC 3 button simultaneously. 4. "TEST MODE" is displayed on the fluorescent display tube. 5. Press the FUNCTION button and switch the function to the deck with the tape (AMS-110A). 6. Press the CD SYNC button. "AMS CHECK" is displayed on the fluorescent display tube and the tape is rewound. 7. AMS starts in the normal direction. If the AMS count is 2 at shut down, proceed to step 8. "NG" is displayed at other times, and the deck stops. 8. AMS starts in the opposite direction. If the AMS count is 2 at shut down again, "OK" is displayed. "NG" is displayed at other times. Note: The p button of CD section will become effective and the aging of CD section will stop sometime, if the buttons described in step 3 are not pressed simultaneously. In that case, press ^/CD button and operate the CD section.
21
SECTION 5 TEST MODE (MD)
5-1. 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 (MD) 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 (MD) button after pressing the MENU/NO button and the rotation of disc is stopped. 5-1-1. 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 REC (MD) button.
5-2. SETTING THE TEST MODE
The following are two methods of entering the test mode. Procedure 1: With the power ON, press the CD-MD SYNC button while pressing the p and ENTER/YES buttons together. When the test mode is set, "Check" will be displayed. Rotating the AMS dial switches between the following four groups; ···Nn Check Nn Adjust Nn Service Nn Develop Nn ···. Procedure 2: With the power ON, press the REC (MD) button while pressing the p and ENTER/YES buttons together. 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.
5-3. EXITING THE TEST MODE
Press the REPEAT/STEREO/MONO button.
5-4. BASIC OPERATIONS OF THE TEST MODE
All operations are performed using the AMS dial, ENTER/YES button, and MENU/NO button. The functions of these buttons are as follows.
Function name AMS dial ENTER/YES button MENU/NO button Function Changes parameters and modes Proceeds onto the next step. Finalizes input. Returns to previous step. Stops operations.
22
5-5. SELECTING THE TEST MODE
There are 31 types of test modes as shown below. The groups can be switched by rotating the AMS dial. After selecting the group to be used, press the MD WALKMAN SYNC button. After setting a certain group, rotating the AMS dial 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 ACCESS MODE 0920 CHECK HEAD ADJUST CPLAY2 MODE CREC2 MODE 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 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 play 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) 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 3. · If a different mode has been selected by mistake, press the MENU/NO button to exit that mode. · Modes with (X) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set accidentally, press the MENU/NO button to exit the mode immediately. 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.
23
5-5-1. Operating the Continuous Playback Mode 1. Entering the continuous playback mode 1 Set the disc in the unit. (Whichever recordable discs or discs for playback only are available.) 2 Rotate the AMS dial and display "CPLAY MODE". 3 Press the ENTER/YES 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 ENTER/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. 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 MENU/NO button. The display will change to "CPLAY MODE". 2 Press the §EJECT (MD) 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 5-5-2. 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 Rotate the AMS dial and display "CREC MODE". 3 Press the ENTER/YES button to change the display to "CREC MID". 4 When access completes, the display changes to "CREC ( )" and "REC" indicator lights up. Note : The numbers " " displayed shows you the recording position addresses. 2. Changing the parts to be recorded 1 When the ENTER/YES button is pressed during continuous recording, the display changes as below. "CPLAY MID" n "CPLAY OUT" n "CPLAY IN" When pressed another time, the parts to be recorded can be changed. "REC" indicator goes off. 2 When access completes, the display changes to "CREC ( )" and "REC" indicator lights up. Note : The numbers " " displayed shows you the recording position addresses. 3. Ending the continuous recording mode 1 Press the MENU/NO button. The display changes to "CREC MODE" and "REC" indicator goes off. 2 Press the §EJECT (MD) button to remove the disc. Note 1 : The recording start addresses for IN, MID, and OUT are as follows. IN 40h cluster MID 300h cluster OUT 700h cluster Note 2 : The MENU/NO button can be used to stop recording anytime. Note 3 : Do not perform continuous recording for long periods of time above 5 minutes. Note 4 : During continuous recording, be careful not to apply vibration. 5-5-3. 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 MENU/NO button immediately to exit it.
24
5-6. FUNCTIONS OF OTHER BUTTONS
Function ^/MD p ) 0 CLEAR PLAY MODE DISPLAY § EJECT (MD) * * 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
REPEAT/STEREO/MONO Exits the test mode * This function works only when the p button is pressed and "MD" is displayed. In other cases, it works everytime the p button is pressed.
5-7. TEST MODE DISPLAYS
Each time the DISPLAY button is pressed, the display changes in the following order. 1. Mode display Displays "TEMP ADJUST", "CPLAYMODE", etc. 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 CLEAR 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.
Mode display 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)
MEANINGS OF OTHER DISPLAYS
Contents Display ^/MD ^/MD REC SYNC L-SYNC OVER 1 REPEAT TRACK DISC SHUFFLE MONO * * When Lit During continuous playback (CLV: ON) (Green) Tracking servo OFF (Unber) 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 Tracking servo ON (Green) Recording mode OFF CLV normal mode When Off STOP (CLV: OFF) (Light off)
* Differentiate ^/MD by the color of the button indicator.
25
SECTION 6 MECHANICAL ADJUSTMENTS
Precaution 1. Clean the following parts with a denatured alcohol-moistened swab: record/playback heads pinch rollers erase head rubber belts capstan idlers 2. Demagnetize the record/playback head with a head demagnetizer. 3. Do not use a magnetized screwdriver for the adjustments. 4. After the adjustments, apply suitable locking compound to the parts adjusted. 5. The adjustments should be performed with the rated power supply voltage unless otherwise noted. Torque Measurement
Mode FWD FWD back tension REV REV back tension FF/REW FWD tension REV tension Torque meter CQ-102C CQ-102C CQ-102RC CQ-102RC CQ-201B CQ-403A CQ-403R Meter reading 31 to 71 g · cm (0.43 0.98 oz · inch) 2 to 6 g · cm (0.02 0.08 oz · inch) 31 to 71 g · cm (0.43 0.98 oz · inch) 2 to 6 g · cm (0.02 0.08 oz · inch) 71 to 143 g · cm (0.98 1.99 oz · inch) 100 g or more (3.53 oz or more) 100 g or more (3.53 oz or more)
26
SECTION 7 ELECTRICAL ADJUSTMENTS
MD SECTION 7-1. 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
27
7-2. 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.
7-3. 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 9.) 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
7-5. CREATING CONTINUOUSLY RECORDED DISC 7-4. 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. Rotate the AMS dial and display "CREC MODE". 3. Press the ENTER/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 (MD) 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.
28
7-6. 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 11). 7-6-1. Temperature Compensation Offset Check When performing adjustments, set the internal temperature and room temperature to 22 to 28°C. Checking Procedure: 1. Rotate the AMS dial to display "TEMP CHECK". 2. Press the ENTER/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.) 7-6-2. Laser Power Check Before checking, check the IOP value of the optical pick-up. (Refer to 7-8. Recording and Displaying IOP Information.) Connection :
Laser power meter
Note 1: After step 4, each time the ENTER/YES button is pressed, the display will be switched between "LD 0.7 mW $ ", "LD 6.2 mW $ ", and "LD WP $ ". Nothing needs to be performed here. 7-6-3. 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 p button and display the "MD", and then press the ) button and move the optical pick-up outside the pit. 4. Rotate the AMS dial and display "EF MO CHECK"(C03). 5. Press the ENTER/YES 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 rotate the AMS dial. (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 p button and display the "MD", and then press the 0 button or ) 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, rotate the AMS dial and display "LDPWR CHECK" (C02). 3. Press the ENTER/YES button once and display "LD 0.9 mW $ ". Check that the reading of the laser power meter become 0.84 to 0.92 mW. 4. Press the ENTER/YES button once more and display "LD 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 ENTER/YES button and display "EFB = MO-W". 8. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS dial. (Write power traverse checking) (Traverse Waveform)
A VC B
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
260A 27X40 B0825
(For details of the method for checking this value, refer to "7-8. Recording and Displaying IOP Information".)
MO-P". 9. Press the ENTER/YES button display "EFB = Then, the optical pick-up moves to the pit area automatically and servo is imposed.
Iop = 82.5 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
5. Press the MENU/NO button and display "LDPWR CHECK" and stop the laser emission. (The MENU/NO button is effective at all times to stop the laser emission.)
N
29
10.Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS dial. (Traverse Waveform)
A VC B
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
11. Press the ENTER/YES button display "EF MO CHECK" The disc stops rotating automatically. 12. Press the §EJECT (MD) button and remove the disc. 13. Load the check disc (MD) TDYS-1. 14. Roteto the AMS dial and display "EF CD CHECK". CD". 15. Press the ENTER/YES button and display "EFB = Servo is imposed automatically. 16. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS dial. (Traverse Waveform)
A VC B
7-6-4. 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 AMS dial and display "CPLAY MODE". 3. Press the ENTER/YES button twice and display "CPLAY MID". 4. Press the MENU/NO button when "C1 = AD = " is displayed. 5. Rotate the AMS dial and display "FBIAS CHECK". 6. Press the ENTER/YES 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 ENTER/YES button and display " / b = ". Check that the C1 error is below 220 and ADER is below 2. 8. Press the ENTER/YES button and display " / a = ". Check that the C1 error is below 220 and ADER is below 2. 9. Press the MENU/NO button, next press the §EJECT (MD) button, and remove the test disc. 7-6-5. C PLAY Checking MO Error Rate Check Checking Procedure : 1. Load a test disk (MDW-74/AU-1). 2. Rotate the AMS dial and display "CPLAY MODE". 3. Press the ENTER/YES 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 MENU/NO button, stop playback, press the §EJECT (MD) button, and test disc. CD Error Rate Check Checking Procedure : 1. Load a check disc (MD) TDYS-1. 2. Rotate the AMS dial and display "CPLAY MODE". 3. Press the ENTER/YES button twice and 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, stop playback, press the §EJECT (MD) button, and the test disc. 7-6-6. 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. Rotate the AMS dial to display "CREC MODE". 3. Press the ENTER/YES 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 MENU/NO button to stop continuous recording. 6. Rotate the AMS dial to display "C PLAY MODE". 7. Press the ENTER/YES 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 MENU/NO button to stop playback, and press the §EJECT (MD) button and remove the disc.
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
17. Press the ENTER/YES button and display "EF CD CHECK". 18. Press the §EJECT (MD) 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
30
7-7. 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 "7-4. Precautions on Adjustments" and execute the initial setting before the adjustment as required. Setting Procedure : 1. Rotate the AMS dial to display "ADJ CLEAR". 2. Press the ENTER/YES button. "Complete!" will be displayed momentarily and initial setting will be executed, after which "ADJ CLEAR" will be displayed.
7-9. 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. Rotate the AMS dial and display "TEMP ADJUST". 2. Press the ENTER/YES 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 ENTER/YES button. When not saving the data, press the MENU/NO button. 5. When the ENTER/YES button is pressed, "TEMP = SAVE" will be displayed and turned back to "TEMP ADJUST" display then. When the MENU/NO button is pressed, "TEMP ADJUST" will be displayed immediatelly. Specified Value : The "TEMP = " should be within "E0 - EF", "F0 - FF", "00 0F", "10 - 1F" and "20 - 2F".
7-8. 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. With the power ON, press the CD-MD SYNC button while pressing the p and ENTER/YES buttons together. 2. Rotate the AMS dial to display "Service", and press the ENTER/YES button. 3. Rotate the AMS dial to display "Iop.Write", and press the ENTER/YES button. 4. The display becomes Ref=@@@.@ (@ is an arbitrary number) and the numbers which can be changed will blink. 5. Input the IOP value written on the optical pick-up. To select the number : Rotate the AMS dial. To select the digit : Press the MD MALKMAN SYNC button. 6. When the ENTER/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 ENTER/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". Display Procedure : 1. Rotate the AMS dial 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 MD MALKMAN SYNC button or MENU/ NO button to display "Iop Read".
7-10. LASER POWER ADJUSTMENT
Check the IOP value of the optical pick-up before adjustments. (Refer to 7-8. 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 p button and display the "MD", and then press the 0 button or ) button to move the optical pick-up.) Connect the digital volt meter to CN110 pin 5 (I+3V) and CN110 pin 4 (IOP). 2. Rotate the AMS dial and display "LDPWR ADJUST". (Laser power : For adjustment) 3. Press the ENTER/YES button once and display "LD 0.9 mW $ ". 4. Rotate the AMS dial so that the reading of the laser power meter becomes 0.85 to 0.91 mW. Press the ENTER/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.
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6. Rotate the AMS dial so that the reading of the laser power meter becomes 6.9 to 7.1 mW, press the ENTER/YES button and save it. Note : Do not perform the emission with 7.0 mW more than 15 seconds continuously. 7. Then, rotate the AMS dial and display "LDPWR CHECK". 8. Press the ENTER/YES button once and display "LD 0.9 mW $ ". Check that the reading of the laser power meter become 0.85 to 0.91 mW. 9. Press the ENTER/YES button once more and display "LD 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
7-11. 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 "7-8. Recording and Displaying IOP Information".)
Iop = 82.5 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
10. Press the MENU/NO button and display "LDPWR CHECK" and stop the laser emission. (The MENU/NO button is effective at all times to stop the laser emission.) 11. Rotate the AMS knob to display "Iop.Write". 12. Press the ENTER/YES button. When the display becomes Ref=@@@.@ (@ is an arbitrary number), press the ENTER/ 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 : Rotate the AMS dial. To select the digit : Press the AMS dial. 14. When the ENTER/YES 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 ENTER/YES button is pressed, the display will be switched between "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 (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 p button and display the "MD", and then press the p button and display the "MD", and then press the ) button and move the optical pick-up outside the pit. 4. Rotate the AMS dial and display "EF MO ADJUS" (C11). MO-R". 5. Press the ENTER/YES button and display "EFB = (Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON) 6. Rotate the AMS dial so that the waveform of the oscilloscope becomes the specified value. (When the AMS dial is rotated, 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)
A VC B
N
Specification A = B
7. Press the ENTER/YES 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. Rotate the AMS dial so that the waveform of the oscilloscope becomes the specified value. (When the AMS dial is rotated, 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 ENTER/YES button, and save the adjustment results in the non-volatile memory. ("EFB = SAVE" 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.
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11. Rotate the AMS dial 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)
7-12. FOCUS BIAS ADJUSTMENT
Adjusting Procedure : 1. Load a test disk (MDW-74/AU-1). 2. Rotate the AMS dial and display "CPLAY MODE". 3. Press the ENTERYES button and display "CPLAY MID". AD = " is 4. Press the MENU/NO button when "C1 = displayed. 5. Rotate the AMS dial and display "FBIAS ADJUS". 6. Press the ENTER/YES 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. Rotate the AMS dial in the clockwise direction and find the focus bias value at which the C1 error rate becomes about 200 (Refer to Note 2). 8. Press the ENTER/YES button and display " / b = ". 9. Rotate the AMS dial in the counterclockwise direction and find the focus bias value at which the C1 error rate becomes about 200. 10. Press the ENTER/YES button and display " / c = ". 11. Check that the C1 error rate is below 50 and ADER is 00. Then press the ENTER/YES button. 12. If the "( )" in " ( )" is above 20, press the ENTER/YES button. If below 20, press the MENU/NO button and repeat the adjustment from step 2. 13. Press the §EJECT (MD) 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 po