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MiniDisc digital audio system
COMPACT DISC DECK RECEIVER
Service Manual
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SERVICE MANUAL
Ver 1.1 2001.06
HCD-MD373
AEP Model UK Model E Model Australian Model Chinese Model Tourist Model
HCD-MD373 is the amplifir, CD, MD and tuner section in DHC-MD373.
Model Name Using Similar Mechanism NEW CD SECTION Mechanism Type Base Unit Type Optical Pick-up Type MD SECTION CDM55A-5SBD32, CDM55C-5BD32 BU-5SBD32, BU-5BD32 KSS-213BA/F-NP
Model Name Using Similar Mechanism MDS-JE520 Mechanism Type Optical Pick-up Type MDM-5A KMS-260B/J1N
SPECIFICATIONS
-- Continued on next page --
COMPACT DISC DECK RECEIVER
9-928-998-12
2001F0200-1 © 2001.6
Sony Corporation
Home Audio Company Shinagawa Tec Service Manual Production Group
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 MENU/NO "R" button to exit the mode. 1. When the power ON, press the 1/u button while pressing the p (MD) button and r REC button together. 2. Press the =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button and when "[Service]" is displayed, press the ENTER/YES "R" button. (If nothing is displayed, press the FUNCTION button and set the function to "MD".) 3. Press the =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button and display "ERR DP MODE". 4. Pressing the ENTER/YES "R" button sets the error history mode and displays "total rec". 5. Select the contents to be displayed or executed using the =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button. 6. Pressing the SYNC REC button will display or execute the contents selected. 7. Pressing the SYNC REC button another time returns to step 4. 8. Pressing the MENU/NO "R" button displays "ERROR DP MODE" and exits the error history mode. 9. To exit the test mode, press the REPEAT/STEREO/MONO button. The unit sets into the STANDBY state, and the test mode ends. Note 1: About "R" As this unit has only a few buttons, some operations require the use of remote commander (RM-SJ373/provided with unit: 1-418-554-11) buttons. These operations are indicated as "R" in this manual. Example: MENU/NO "R" ...Press the MENU/NO button of the remote commander. Note 2: Incorrect operations may be performed if the test mode is not set properly. In this case, press the RESET button of the back panel.
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 =0/MD/CD/ TUNING button or )+/MD/CD/TUNING + 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 SYNC REC button and "er refresh?" is displayed, press the ENTER/YES "R" 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 SYNC REC button and "tm refresh?" is displayed, press the ENTER/YES "R" 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
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.
MODEL IDENTIFICATION -- BACK PANEL --
Parts No.
PARTS No. 4-221-082-1 4-221-082-3 This caution label is located inside the unit. 4-221-082-4 AEP, UK
MODEL HK, SP, MY, AR, AUS, KR, JE CH
· Abbreviation HK : Hong Kong model SP : Singapore model MY : Malaysia model AR : Argentine model AUS : Australian model KR : Korea model CH : Chinese model JE : Tourist model CAUTION
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. Notes on chip component replacement · Never reuse a disconnected chip component. · Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing · Keep the temperature of soldering iron around 270°C during repairing. · Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). · Be careful not to apply force on the conductor when soldering or unsoldering.
SAFETY-RELATED COMPONENT WARNING !! COMPONENTS IDENTIFIED BY MARK ! 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.
4
Ver 1.1 2001.06
TABLE OF CONTENTS 1. SERVICING NOTE .......................................................... 6 2. GENERAL ........................................................................ 16 3. DISASSEMBLY
3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. Case ................................................................................... 19 Front Panel ......................................................................... 20 Back Panel ......................................................................... 20 Main Board and Power Transformer ................................. 21 CD Mechanism Deck ......................................................... 21 Tray, Gear and Cam ........................................................... 22 CD Base Unit ..................................................................... 22 Optical Pick-up Section of CD (KSS-213BA/F-NP) ......... 22 BD (CD) Board, Spindle Motor (M101) and Sled Motor (M102) ............................................................ 23 3-10. MD Mechanism Deck ........................................................ 23 3-11. Slider (Cam) ...................................................................... 24 3-12. Base Unit (MBU-5A) and BD (MD) Board ...................... 24 3-13. Over Write Head ................................................................ 25 3-14. Optical Pick-up of MD (KMS-260B/J1N) ........................ 25 3-15. Spindle Motor (M901) and SLed Motor (M902) (MD) .... 25
7. EXPLODED VIEWS
7-1. 7-2. 7-3. 7-4. 7-5. 7-6. 7-7. 7-8. Case and Front Panel Section ............................................ 77 Chassis Section .................................................................. 78 MD Mechanism Section (MDM-5A) ................................ 79 MD Base Unit Section (MBU-5A) .................................... 80 CD Mechanism Section (CDM55A-5SBD32)................... 81 CD Base Unit Section (BU-5SBD32) ............................... 82 CD Mechanism Section (CDM55C-5BD32) ..................... 83 CD Base Unit Section (BU-5BD32) .................................. 84
8. ELECTRICAL PARTS LIST ........................................ 85
4. TEST MODE ..................................................................... 26 5. ELECTRICAL ADJUSTMENTS ............................... 31 6. DIAGRAMS
6-1. Circuit Boards Location ..................................................... 40 6-2. Block Diagrams · BD (CD) Section ............................................................ 41 · BD (MD) Section (1/2) ................................................... 42 · BD (MD) Section (2/2) ................................................... 43 · Main Section ................................................................... 44 6-3. Printed Wiring Board BD (CD) Section ...................... 46 6-4. Schematic Diagram BD (CD) Section ......................... 47 6-5. Printed Wiring Board BD (MD) Section ..................... 48 6-6. Schematic Diagram BD (MD) Section (1/2) ............... 49 6-7. Schematic Diagram BD (MD) Section (2/2) ............... 50 6-8. Schematic Diagram SP Section ................................... 51 6-9. Printed Wiring Board SP Section ................................ 51 6-10. Printed Wiring Board Main Section ............................ 52 6-11. Schematic Diagram Main Section (1/3) ...................... 53 6-12. Schematic Diagram Main Section (2/3) ...................... 54 6-13. Schematic Diagram Main Section (3/3) ...................... 55 6-14. Schematic Diagram MD Digital Section ..................... 56 6-15. Printed Wiring Board MD Digital Section .................. 57 6-16. Schematic Diagram AMP Section ............................... 58 6-17. Printed Wiring Board AMP Section ............................ 59 6-18. Schematic Diagram Panel Section ............................... 60 6-19. Printed Wiring Board Panel Section ............................ 61 6-20. Schematic Diagram Power Section ............................. 62 6-21. Printed Wiring Board Power Section ........................... 63 6-22. Schematic Diagram BD Switch Section ...................... 64 6-23. Printed Wiring Board BD Swtich Section ................... 64 6-24. Schematic Diagram Loading Section .......................... 64 6-25. Printed Wiring Board Loading Section ........................ 64 6-26. IC Block Diagrams ............................................................ 65 6-27. IC Pin Functions ................................................................ 69
5
SECTION 1 SERVICING NOTE
Note 1: "R" As this unit has only a few buttons, some operations require the use of remote commander (provided with RM-SJ373/unit: 1-418-554-11) buttons. These operations are indicated as "R" in this manual. Example: MENU/NO "R" ...Press the MENU/NO button of the remote commander.
DRAWING OUT THE TRAY DURING POWER OFF
Tray (CDM)
Move the Cam block in the direction of arrow with a finger.
REMOVING THE INDICATION PLATE (FL)
Note: Follow the disassembly procedure in the numerical order given. 4 Panel board 3 Six screws (BVTP 3x10)
· Press the of the front panel from the rear and remove the 7 indication plate (FL).
7 Indication plate (FL)
2 Nut
6 Filter (FL)
1 Knob (VOL) 5 Ring (VOL) (Remove the two claws from the Front panel back side.)
CLEANING THE OPTICAL PICKUP (CD PLAYER)
CD mechanism deck
Floating screw
Optical pick-up block Clean the lens block with applicator.
6
SERVICE POSITION THE MD MECHANISM
SERVICE POSITION THE CD MECHANISM
MD mechanism deck
CD mechanism deck
SERVICE POSITION THE POWER BOARD
Power board
Amp board
Main board CN993 CN802 Extension cable (4P) (J-2501-042-A) Extension cable (3P) (J-2501-045-A)
7
Cold Reset · The cold reset clears all data inculuding preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer. Procedure 1: (recommended) Press the RESET button on the back panel. Procedure 2: 1. When the power ON, press the 1/u button while pressing the PLAY MODE/TUNING MODE button and p (CD) buttons together. 2. "COLD RESET" is displayed on the fluorescent indicator tube and reset is executed. Hot Reset · This mode reset the preset data kept in the memory. The hot reset mode functions same as if the power cord is plugged in and out. Procedure : 1. When the power ON, press the 1/u button while pressing the PLAY MODE/TUNING MODE button and ^ (CD) buttons together. 2. Turn off the unit and reset is executed. LED and Fluorescent Indicator Tube All Lit, Key Check Mode Procedure : 1. When the power ON, press the 1/u button while pressing the PLAY MODE/TUNING MODE button and 6 (CD) buttons together. 2. LEDs and fluorescent indicator tube are all turned on. 3. Press ^ (MD) button to turn set on. 4. In the key check mode, the fluorescent indicator tube displays "Key 0 Vol 0". Each time a button is pressed, "Key" value increases. However, once a button is pressed, it is no longer taken into account. "Vol" Value increases like "1, 2, 3 ..." if rotating VOLUME knob in the clockwise direction, or decreases like "0, 9, 8 ..." if rotating in the counterclockwise diretion. 5. To exit from this mode, press three buttons in the same procedure as step 1, or disconnect the power cord. Note: Press the =0/MD/CD/TUNING button or )+/MD/CD/TUNING+ button for more than 1 second. Change-over of AM tuner Step between 9kHz and 10kHz. · A step of AM channels can be changed over between 9kHz and 10kHz. 1. Press 1/u button to turn set on. 2. Select the function "TUNER", and press TUNER/BAND button to select the BAND "AM". 3. Press 1/u button to turn on the set OFF. 4. When the power OFF, press 1/u button while pressing the PLAY MODE/TUNING MODE button. The display of fluorescent indicator tube changes to "AM 9k STEP" or "AM 10k STEP", and thus the channel step is changed over. CD Text Display · This unit displays CD text. Text is displayed for the first 50 track only and will not be displayed from the 51st track onwards. Do not suspect a fault in this case. In some cases, some special characters will not be displayed and may be replaced by other characters. Donot suspect a fault in this case.
8
Aging Mode · Mode for repeating operations of the CD player automatically. When errors occur: Aging stops and a message indicating that an error has occurred such as "CD MEC ERR" is displayed. (For details of errors, refer to "Error History Display Mode".) When no errors occur: Aging is repeatedly performed. Procedure: 1. Load any CD. 2. Press the FUNCTION button and set the function to CD. 3. While pressing the PLAY MODE/TUNING MODE button and ^ (MD) button, press the 1/u button. 4. "AGING" is displayed on the fluorescent display tube briefly. 5. When the aging mode is set, the CD mark and MD mark on the fluorescent tube blink. 6. Pressing the ^ (CD) button starts aging. Operations are performed in the following sequence during aging.
Reading of TOC Playback of first track Playback of last track CD tray open CD tray close
7. To end aging, while pressing the PLAY MODE/TUNING MODE button and ^ (CD) button, press the 1/u button. (Hot reset is executed.) Error History Display Mode Mode for checking the history of errors which have occurred in the CD player. Execute this mode after ending the aging mode. Procedure: 1. Press the FUNCTION button, and set the function to "CD". 2. While pressing the p (MD) button and )+/MD/CD/TUNING+ button, press the 1/u button. 3. "EMC@@EDC**" id displayed. @@ : Number of mechanism errors (Past 3 errors) ** : Number of errors (NO DISC ERROR) which occurred after chucking (Past 3 errors) 4. To check the history of mechanism errors, press the PLAY MODE/TUNING MODE button, and to check BD errors, press the REPEAT/ STEREO/MONO button, and switch the display. 5. To end, press the 1/u button and turn OFF the power. 6. To erase the error history, perform COLD reset. (While pressing the PLAY MODE/TUNING MODE button and p (CD) button, press the 1/u button.)
9
· Reading the Mechanism Error History Display (To switch the history, press the PLAY MODE/TUNING MODE button.) Display E@@M**#*$* @@: Error number. 00 is the latest *: Invalid #: Load in operations related D: Operations stopped due to problems other than mechanism related during CLOSE E: Operations stopped due to problems other than mechanism related during OPEN C: Operations stopped due to problems other than mechanism related during chucking up $: Load out operations related 1: Operations stopped during chucking up 2: Operations stopped during chucking down · Reading the BD Error History Display (To switch the history, press the REPEAT/STEREO/MONO button.) Display E@@D##SS%* @@: Error number. 00 is the latest ##: Error details 01: Focus error 02: GFS error 03: Setup error $$: Retry performed/not performed 00: Determined as NO DISC without chucking retry 02: Determined as NO DISC after chucking retry %: State when determined as NO DISC 1: When stopped 2: During setup 3: During TOC READ 4: During access 5: During playback 6: During PAUSE 7: During manual search (during playback) 8: During manual search (during Pause) *: Invalid
10
JIG FOR CHECKING BD (MD) BOARD WAVEFORM
The special jig (J-2501-149-A) is useful for checking the waveform of the BD (MD) 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
RF
VC 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
11
IOP DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC171 OF BD (MD) 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 (MD) board), record the IOP value on the optical pick-up according to the following procedure. Record Precedure: 1. When the power ON, press the 1/u button while pressing the p (MD) button and r (REC) button together. 2. Press the =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button to display "[Service]", and press the ENTER/ YES "R" button. 3. Press the =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button to display " lop. Write", and press the ENTER/ YES "R" 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 =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button. To select the digit : Press the SYNC REC button. 6. When the ENTER/YES "R" 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 "R" 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. "Standby" will be displayed. Display Precedure: 1. When the power ON, press the 1/u button while pressing the p (MD) button and r (REC) button together. 2. Press the =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button to display "[Service]", and press the ENTER/ YES "R" button. 3. Press the =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button 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 SYNC REC button or MENU/NO "R" button to display "Iop Read". Then press the REPEAT STEREO/MONO button to display "Standby".
12
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 33)
Traverse check (5-6-3 : See page 33) Focus bias check (5-6-4 : See page 34)
· Replace the optical pick-up · Replace the optical pick-up
C PLAY check (5-6-5 : See page 34)
· Replace the optical pick-up
Self-recording/playback check (REC/PLAY) (5-6-6 : See page 34)
TEMP check (Temperature compensation offset check) (5-6-1 : See page 33)
· 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 : Press the S101 ( RESET button of the back panel) on the MAIN board. [MAIN BOARD] (Component Side)
SET REAR PANEL
S101 S101 RESET button
13
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 MENU/NO "R" button. When "Edit/Menu" is displayed on the fluorescent indicator tube, press the =0/MD/CD/ TUNING button or )+/MD/CD/TUNING + button to display "All Erase?". 3. Press the ENTER/YES "R" button. 4. When "All Erase??" is displayed on the fluorescent indicator tube, the music calendar number blinks. 5. Press the ENTER/YES "R" button to display "Complete!!", and press the p (MD) button immediately. Wait for about 10 seconds while pressing the button. 6. When the "TOC" displayed on the fluorescent display tube goes off, release the p (MD) button. 7. Press the r REC button to start recording. Then press the ^ (MD) button and start recording. If recording cannot be performed, press the FUNCTION button and set a different section. 8. To check the "track mode", press the ^ (MD) button to start play. 9. 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".
14
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
24 7
23
8 9 10 11
22
21
20
19
18
17
16 15 14
13
12
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 24 1/u (power) switch MD slot 6 (Eject) (MD) button MD indicator (P (MD) button p (MD) button VOLUME (CD) knob (P (CD) button p (CD) button TUNER/BAND button FUNCTION button MD/CD =0/)+ + button MD/CD =0/)+ button CD indicator 6 (CD) button LINE IN jack r REC button CD/MD SYNC button Disc tray REPEAT, STEREO/MONO button PLAY MODE/TUNING MODE button PHONES jack Remote sensor Display window
16
This section is extracted from instruction manual.
17
18
SECTION 3 DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
Case (Page 19)
Front panel (Page 20)
Back panel (Page 20)
Main board and Power transformer (Page 21)
CD base unit section (Page 22)
Optical pick-up (CD) (Page 22) BD (CD) board Sled motor (M102) Spindle motor (M101) (Page 23) Tray, Gear and Cam section (Page 22)
MD mechanism deck (Page 23)
MD base unit BD (MD) board (Page 24)
Over write head section Optical pick-up (MD) (Page 25)
Slider (CAM) (Page 24)
Sled motor (M902) Spindle motor (M901) (Page 25)
Note: Follow the disassembly procedure in the numerical order given.
3-1. CASE
3 Case 1 Two screws (Case 3 TP2)
2 Two screws (Case 3 TP2)
19
3-2. FRONT PANEL
8 Screw (BVTT 3x6)
5 Screw (BVTT 3x10) 0 MD mechanism block
7 Front panel block (Two claws) 2 Flat type wire (31 core)
9 Screw (BVTT 3x6) 1 Flat type wire (25 core)
Claw
6 Screw (BVTT 3x6)
3 Ground wire (Black)
Claw Claw
4 Ground wire (Red)
3-3. BACK PANEL
3 Back panel (Two claws)
1 Three screws (BVTP 3x10)
Claw
2 Four screws (BVTP 3x10)
Hole
Claw
Claw
20
3-4. MAIN BOARD AND POWER TRANSFORMER
4 Connector (2P) 5 Connector (2P) !TM Power transformer 3 Connector (4P) 7 Screw (BVTP 3x6) 6 Connector (Amp board, CN801) (Take note of the claw) 8 Screw (BVTP 3x6) 0 Connector (3P)
Amp board (CN801)
SP board Power board
2 Flat type wire (15 core) 9 Two screws (BVTT 3x6) 1 Flat type wire (19 core) !¡ Four screws (BVTT 3x6)
Main board
3-5. CD MECHANISM DECK
4 Screw (BVTT 3x6)
3 Holder (MDM)
6 CD mechanism deck (Two claws) 2 Screw (BVTT 3x6)
5 Connector (5P)
Two claws
1 Screw (BVTT 3x6)
7 Flat type wire (19 core)
21
3-6. TRAY, GEAR AND CAM
4 Belt (CDM55) 5 Bushing 6 Pulley (LDG) 8 Gear (B)
7 Roller
9 Gear (A)
0 Cam (CDM55) 2 Push the claw in tne direction of arrow C.
C
A
B
1 Pull out the tray in the arrow direction A, and release the lock while pressing this claw in the arrow direction B.
3 Pull out the tray.
B
Release
3-7. CD BASE UNIT
1 Floating screw (PTPWH M2.6)
3-8. OPTICAL PICK-UP SECTION OF CD (KSS-213BA/F-NP)
3 Optical pick-up (for CD)
2 Remove the Holder (BU) assembly in the direction of arrow A. A
1 Release the lever in the arrow direction B.
4 Flat type wire (16 core)
2 Sled shaft
B
22
3-9. BD (CD) BOARD, SPINDLE MOTOR (M101) AND SLED MOTOR (M102)
6 Gear (M) 4 Two screws (P 2x3) 8 Two Insulators (BU)
!¡ Spindle motor (M101)
2 Remove the four solders. 0 Sled shaft 7 Flatness gear (P)
M101 IC102 M102
9 Two Insulators (BU)
5 Sled motor (M102)
IC103 IC101
3 BD (CD) board
1 Screw (BVTP 2.6x8)
3-10. MD MECHANISM DECK
1 Two Step screws (BVTPWH M3)
2 Two Step screws (BVTPWH M3)
3 MD mechanism deck
4 Connector (7P) 5 Flat type wire (21 core)
6 Flat type wire (23 core)
7 Bracket (MDM)
23
3-11. SLIDER (CAM)
6 Slider (CAM)
· Note for installation of Slider (CAM)
A
Set the shaft of Cam gear to be at the position in the figure.
2 Bracket (GUIDE L) 1 Two screws (BTP 2.6x6)
3 Leaf spring
Set the shaft of Lever (O/C) to be at the position in the figure.
4 Two screws (BTP 2.6x6)
When attaching the slider (cam), this part of the over write head should be inside arrow A.
5 Bracket (GUIDE R)
3-12. BASE UNIT (MBU-5A) AND BD (MD) BOARD
2 Base unit (MBU-5A) 6 Flexible board
7 Flexible board 1 Three screws (BTP 2.6x6)
Spindle motor CN104 CN110
+
3 Remove the two solders. Read wire's color Red : + Black : -
Sled motor
CN101
4 Remove the two solders. 7 BD (MD) board 5 Screw (M 1.7x4)
24
3-13. OVER WRITE HEAD
2 Screw (P 1.7x6)
3-14. OPTICAL PICK-UP OF MD (KMS-260B/J1N)
Note: Turn the optical pick-up inside out, and pull out the flexible board.
5 Optical pick-up (for MD)
3 Over write head (HR901)
4 Flexible board
1 Flexible board
1 Screw (B 2x8) 2 Leaf spring (SHAFT)
3 Main shaft
3-15. SPINDLE MOTOR (M901) AND SLED MOTOR (M902) (MD)
4 Three screws (B 2x5)
3 Gear (SL-B)
1 Screw (M1.7)
2 Gear (SL-A)
5 Spindle motor (M901)
The BD (MD) board is soldered at two parts. (See page 24.)
6 Two screws (P 1.7x2.5)
7 Sled motor (M902)
25
SECTION 4 TEST MODE
Note 1: About "R" As this unit has only a few buttons, some operations require the use of remote commander (RM-SJ373/provided with unit: 1-418-554-11) buttons. These operations are indicated as "R" in this manual. Example: MENU/NO "R" ...Press the MENU/NO button of the remote commander.
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 (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 6 (MD) button after pressing the MENU/NO "R" 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 rREC button.
4-2. SETTING THE TEST MODE
The following are two methods of entering the test mode. Procedure 1: Press the FUNCTION button, and set the function to "MD". When the power ON, press the 1/u button while pressing the p (MD) button and r REC button together. When the test mode is set, "[Check]" will be displayed. Pressing the =0/MD/CD/TUNING button or )+/MD/ CD/TUNING + button switches between the following four groups; ···Nn Check Nn Adjust Nn Service Nn Develop Nn ···. Procedure 2: Press the FUNCTION button, and set the function to "MD". When the power ON, press the 1/u button while pressing the p (MD) button and SYNC REC button 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.
4-3. EXITING THE TEST MODE
Press the REPEAT/STEREO/MONO button.
4-4. BASIC OPERATIONS OF THE TEST MODE
All operations are performed using the =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button, ENTER/YES "R" button, and MENU/NO "R" button. The functions of these buttons are as follows.
Function name =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button ENTER/YES "R" button MENU/NO "R" button Function Changes parameters and modes Proceeds onto the next step. Finalizes input. Returns to previous step. Stops operations.
26
4-5. SELECTING THE TEST MODE
There are 31 types of test modes as shown below. The groups can be switched by pressing the =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button. After selecting the group to be used, press the ENTER/YES "R" button. After setting a certain group, pressing the =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button 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 2. · If a different mode has been selected by mistake, press the MENU/NO "R" 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 "R" 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.
27
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 =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button and display "CPLAY MODE". 3 Press the ENTER/YES "R" 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 "R" 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 "R" button. The display will change to "CPLAY MODE". 2 Press the 6 (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 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 ress the =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button and display "CREC MODE". 3 Press the ENTER/YES "R" button to change the display to "CREC MID". 4 When access completes, the display changes to "CREC ( )" and r 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 "R" button is pressed during continuous recording, the display changes as below. "C REC MID" n "C REC OUT" n "C REC IN" When pressed another time, the parts to be recorded can be changed. r REC indicator goes off. 2 When access completes, the display changes to "CREC ( )" and r 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 "R" button. The display changes to "CREC MODE" and r REC indicator goes off. 2 Press the 6 (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 "R" 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 MENU/NO "R" button immediately to exit it.
28
4-6. FUNCTIONS OF OTHER BUTTONS
Function ^ (MD) p (MD) )+/MD/CD/TUNING + =0/MD/CD/TUNING CLEAR "R" PLAY MODE/TUNING MODE DISPLAY "R" 6 (MD) REPEAT/STEREO/MONO 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 Exits the test mode
Use the remote commander (RM-SJ373/provided with unit: 1-418-554-11) buttons for operations indicated as "R".
4-7. TEST MODE DISPLAYS
Each time the DISPLAY "R" 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 CLEAR "R" 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)
29
MEANINGS OF OTHER DISPLAYS
Display ( (MD) * P (MD) * r REC * SYNC LEVEL-SYNC OVER 1 REPEAT TRACK DISC SHUFFLE 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
* Items shown correspond to the indicated button indicators.
30
SECTION 5 ELECTRICAL ADJUSTMENTS
MD SECTION 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
31
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-260B)
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
¬
¬
G
G
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 =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button and display "CREC MODE". 3. Press the ENTER/YES "R" button again to display "CREC MID". Display "CREC (0300)" and start to recording. 4. Complete recording within 5 minutes. 5. Press the MENU/NO "R" button and stop recording . 6. Press the 6 (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
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.
32
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 13). 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 =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button to display "TEMP CHECK". 2. Press the ENTER/YES "R" 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.)
Laser power meter
5. Press the MENU/NO "R" button and display "LDPWR CHECK" and stop the laser emission. (The MENU/NO "R" button is effective at all times to stop the laser emission.) Note 1: After step 4, each time the ENTER/YES "R" 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. 5-6-3. Traverse Check Connection :
Oscilloscope
BD (MD) 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
BD (MD) board CN110 pin 5 (I+3V) CN110 pin 4 (IOP)
Checking Procedure: 1. Connect an oscilloscope to CN110 pin 3 (TE) and CN110 pin 1 (VC) of the BD (MD) board. 2. Load a disc (any available on the market). (Refer to Note 1.) 3. Press the )+/MD/CD/TUNING + button continuously and move the optical pick-up outside the pit. 4. Press the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button and display "EF MO CHECK". 5. Press the ENTER/YES "R" button and display "EFB = MOR". (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 =0/MD/CD/ TUNING button or )+/MD/CD/TUNING + button. (Read power traverse checking) (Traverse Waveform)
Connection : 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 =0/ MD/CD/TUNING button or )+/MD/CD/TUNING + button continuously 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 = 0 /MD/CD/TUNING button or )+/MD/CD/TUNING + button and display "LDPWR CHECK". 3. Press the ENTER/YES "R" 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 "R" 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)
A VC B
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
7. Press the ENTER/YES "R" button and display "EFB = MOW". 8. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not press the =0/MD/CD/ TUNING button or )+/MD/CD/TUNING + button. (Write power traverse checking) (Traverse Waveform)
A
KMS
260A 27X40 B0825
(For details of the method for checking this value, refer to "5-8. Recording and Displaying IOP Information".)
VC B
Iop = 82.5 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
N
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
33
9. Press the ENTER/YES "R" button display "EFB = MO-P". Then, the optical pick-up moves to the pit area automatically and servo is imposed. 10. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not press the =0/MD/CD TUNING button or )+/MD/CD/TUNING+ button. (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 "R" button display "EF MO CHECK" The disc stops rotating automatically. 12. Press the 6 (MD) button and remove the disc. 13. Load the check disc (MD) TDYS-1. 14. Press the )+/MD/CD/TUNING + button and display "EF CD CHECK". 15. Press the ENTER/YES "R" 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 =0/MD/CD TUNING button or )+/MD/CD/TUNING+ button. (Traverse Waveform)
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. Press the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button and display "CPLAY MODE". 3. Press the ENTER/YES "R" button twice and display "CPLAY MID". 4. Press the MENU/NO "R" button when "C1 = AD = " is displayed. 5. Press the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button and display "FBIAS CHECK". / c= 6. Press the ENTER/YES "R" button and display " ". The first four digits indicate the C1 error rate, the two digits after "/" indicate ADER, and the 2 digits after "c =" indicate the focus bias value. Check that the C1 error is below 220 and ADER is below 2. 7. Press the ENTER/YES "R" button and display " / b= ". Check that the C1 error is below 220 and ADER is below 2. 8. Press the ENTER/YES "R" button and display " / a= ". Check that the C1 error is below 220 and ADER is below 2. 9. Press the MENU/NO "R" button, next press the 6 (MD) button, and remove the test disc. 5-6-5. C PLAY Checking MO Error Rate Check Checking Procedure : 1. Load a test disk (MDW-74/AU-1). 2. Press the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button and display "CPLAY MODE". 3. Press the ENTER/YES "R" 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 "R" button, stop playback, press the 6 (MD) button, and test disc. CD Error Rate Check Checking Procedure : 1. Load a check disc (MD) TDYS-1. 2. Press the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button and display "CPLAY MODE". 3. Press the ENTER/YES "R" button twice and display "CPLAY MID". 4. The display changes to "C1 = AD = ". 5. Check that the C1 error rate is below 50. 6. Press the MENU/NO "R" button, stop playback, press the 6 (MD) 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 =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button to display "CREC MODE". 3. Press the ENTER/YES "R" button to display the "CREC MID". 4. When recording starts, r REC indicator lights up displayed, this becomes "CREC (@@@@)" (@@@@ is the address), and recording starts. 5. About 1 minute later, press the MENU/NO "R" button to stop continuous recording. 6. Press the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button to display "C PLAY MODE". 7. Press the ENTER/YES "R" button to display "C PLAY MID".
A VC B
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
17. Press the ENTER/YES "R" button and display "EF CD CHECK". 18. Press the 6 (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 (MD) board CN110 pin 3 (TE) CN110 pin 1 (VC)
330 k 10pF
34
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 "R" button to stop playback, and press the 6 (MD) button and remove the disc.
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 =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button and display "TEMP ADJUST". 2. Press the ENTER/YES "R" 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 "R" button. When not saving the data, press the MENU/NO "R" button. 5. When the ENTER/YES "R" button is pressed, "TEMP = SAVE" will be displayed and turned back to "TEMP ADJUST" display then. When the MENU/NO "R" 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".
5-7. 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 =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button to display "ADJ CLEAR". 2. Press the ENTER/YES "R" button. "Complete!" will be displayed momentarily and initial setting will be executed, after which "ADJ CLEAR" will be displayed.
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. When the power ON, press the 1/u button while pressing the p (MD) button and r (REC) button together. 2. Press the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button to display "[Service]", and press the ENTER/YES "R" button. (If nothing is displayed, press the FUNCTION button and set the function to "MD". 3. Press the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button to display "Iop.Write", and press the ENTER/YES "R" 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 =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button. To select the digit : Press the SYNC REC button. 6. When the ENTER/YES "R" 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 "R" 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 =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button to display "Iop.Read". 2. When the ENTER/YES "R" button is pressed, "@@.@/##.#" will be 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 SYNC REC button or MENU/NO "R" 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 (MD) 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 =0/ MD/CD/TUNING button or )+/MD/CD/TUNING + button continuously 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 =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button and display "LDPWR ADJUST". (Laser power : For adjustment) 3. Press the ENTER/YES "R" button once and display "LD 0.9 mW $ ". 4. Press the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button so that the reading of the laser power meter becomes 0.85 to 0.91 mW. Press the ENTER/YES "R" button after setting the range knob of the laser power meter, and save the adjustment results. ("LD SAVE $ " will be displayed for a moment.)
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5. Then "LD 7.0 mW $ " will be displayed. 6. Press the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button so that the reading of the laser power meter becomes 6.9 to 7.1 mW, press the ENTER/YES "R" button and save it. Note : Do not perform the emission with 7.0 mW more than 15 seconds continuously. 7. Then, Press the = 0 /MD/CD/TUNING button or )+/MD/CD/TUNING + button and display "LDPWR CHECK". 8. Press the ENTER/YES "R" 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 "R" 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
5-11. TRAVERSE ADJUSTMENT
Connection :
Oscilloscope
BD (MD) 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 MENU/NO "R" button and display "LDPWR CHECK" and stop the laser emission. (The MENU/NO "R" button is effective at all times to stop the laser emission.) 11. Press the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button to display "Iop.Write". 12. Press the ENTER/YES "R" button. When the display becomes Ref=@@@.@ (@ is an arbitrary number), press the ENTER/ YES "R" 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 =0/MD/CD/TUNING button or )+/MD/CD/TUNING + button. To select the digit : Press the SYNC REC button. 14. When the ENTER/YES "R" 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 "R" 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 )+/MD/CD/TUNING + button continuously and move the optical pick-up outside the pit. 4. Press the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button and display "EF MO ADJUST". 5. Press the ENTER/YES "R" button and display "EFB = MOR". (Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON) 6. Press the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button so that the waveform of the oscilloscope becomes the specified value. (When the =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button 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 ENTER/YES "R" 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 =0/MD/CD/TUNING button or )+/ MD/CD/TUNING + button so that the waveform of the oscilloscope becomes the specified value. (When the =0/MD/CD/TUNING button or )+/ of "EFB- " MD/CD/TUNING + button is pressed, the changes and the waveform changes.) In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much a