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Self diagnosis, dolby
Service Manual
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MXD-D3
SERVICE MANUAL
US Model Canadian Model AEP Model UK Model E Model Chinese Model
Photo: Gold
U.S. and foreign patents licensed form Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism CD Section CD Mechanism Type Base Unit Name Optical Pick-up Name Model Name Using Similar Mechanism MD Section MD Mechanism Type Base Unit Name Optical Pick-up Name
NEW CDM14H-5TBD26B BU-5TBD26B KSS-213BH/Z-NP NEW MDM-5X2B MBU-5X2B KMS-262A/J1N
SPECIFICATIONS
Continued on next page
COMPACT DISC MINIDISC DECK
MICROFILM
SELF-DIAGNOSIS FUNCTION
The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes which show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box in the instruction manual. For details on how to check error codes during servicing, refer to the following "Procedure for using the Self-Diagnosis Function (Error History Display Mode)".
PROCEDURE FOR USING THE SELF-DIAGNOSIS FUNCTION (ERROR HISTORY DISPLAY MODE)
Note: Perform the self-diagnosis function in the "error history display mode" in the test mode. The following describes the least required procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the MENU/NO button to exit the mode.
1. Press the x (CD), [CLEAR] (CD), x (MD) and [CLEAR] (MD) buttons at the same time. 2. Press the [ l AMS L ] (MD) knob and x (MD) button to display " <0> To Normal". 3. Turn the [ l AMS L ] (MD) knob and when " <5> MD Test" is displayed, press the [ l AMS L ] (MD) knob. 4. Turn the [ l AMS L ] (MD) knob and when "[Service]" is displayed, press the [YES] button. 5. Turn the [ l AMS L ] (MD) knob to display "ERR DP MODE". 6. Press the [YES] button to sets the error history mode and displays "total rec". 7. Select the contents to be displayed or executed using the [ l AMS L ] (MD) knob. 8. Press the [ l AMS L ] (MD) knob to display or execute the contents selected. 9. Press the [ l AMS L ] (MD) knob another time returns to step 6. 10. Press the [MENU/NO] button to display "ERROR DP MODE" and release the error history mode. 11. To release the test mode, press the ?/1 button to turn the power OFF.
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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 "rssssssh". 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 "pssssssh". 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 "rss pss". "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 ss". The number of errors is displayed in hexadecimal digits from 00 to FF. Displays the 10 latest errors. Displayed as "0s E@@". s indicates the history number. The smaller the number, the more recent is the error. (00 is the latest). @@ indicates the error code. Refer to the following table for the details. The error history can be switched by turning the [ l AMS L ] (MD) knob. Mode which erases the "retry err", "total err", and "err history" histories. When returning the unit to the customer after completing repairs, perform this to erase the past error history. After pressing the [ l AMS L ] (MD) knob and "er refresh?" is displayed, press the [YES] button to erase the history. "Complete!" will be displayed momentarily. Be sure to check the following when this mode has been executed. · The data has been erased. · The mechanism operates normally when recording and play are performed. Mode which erases the "total rec" and "total play" histories. These histories serve as approximate indications of when to replace the optical pick-up. If the optical pickup has been replaced, perform this operation and erase the history. After pressing the [l AMS L ] (MD) knob and "tm refresh?" is displayed, press the [YES] button to erase the history. "Complete!" will be displayed momentarily. Be sure to check the following when this mode has been executed. · The data has been erased. · The mechanism operates normally when recording and play are performed.
total play
retry err
total err
err history
er refresh
tm refresh
Table of Error Codes Error Code E00 E01 Details of Error No error Disc error. PTOC cannot be read (DISC ejected) E02 Disc error. UTOC error (DISC not ejected) E03 E04 Loading error Address cannot be read (Servo has deviated) E0A Error Code E05 E06 E07 E08 E09 Details of Error FOK has deviated Cannot focus (Servo has deviated) Recording retry Recording retry error Playback retry error (Access error) Playback retry error (C2 error)
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SECTION 1 SERVICING NOTES
TABLE OF CONTENTS SELF-DIAGNOSIS FUNCTION .................................... 2 1. 2. 3. 4. 5. 6. SERVICING NOTES ............................................... 4 GENERAL ................................................................... 17 DISASSEMBLY ......................................................... 18 TEST MODE .............................................................. 24 ELECTRICAL ADJUSTMENTS ......................... 30 DIAGRAMS
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 55 55 63
0.15 µF 1.5 k AC voltmeter (0.75 V)
SAFETY CHECK-OUT After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, "metallized" knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes.). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers' instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The "limit" indication is 0.75 V, so analog meters must have an accurate lowvoltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A)
To Exposed Metal Parts on Set
6-1. Note for Printed Wiring Boards and Schematic Diagrams ....................................................... 6-2. Printed Wiring Board BD (CD) Board .................... 6-3. Schematic Diagram BD (CD) Board ....................... 6-4. Schematic Diagram BD (MD) Board (1/2) ............. 6-5. Schematic Diagram BD (MD) Board (2/2) ............. 6-6. Printed Wiring Board BD (MD) Board ................... 6-7. Schematic Diagram MAIN (1/3) /LOADING Boards .............................. 6-8. Schematic Diagram MAIN Board (2/3) .................. 6-9. Schematic Diagram MAIN Board (3/3) .................. 6-10. Printed Wiring Board MAIN Board (Side A) ......... 6-11. Printed Wiring Boards MAIN (Side B)/LOADING Boards ......................... 6-12. Printed Wiring Boards DISPLAY/PWSW/HP Boards .................................. 6-13. Schematic Diagram DISPLAY/PWSW/HP Boards .................................. 6-14. Printed Wiring Board TRANS Board ...................... 6-15. Schematic Diagram TRANS Board ......................... 6-16. Printed Wiring Board SW Board ............................. 6-17. Schematic Diagram SW Board ................................ 6-18. IC Pin Function Description ...........................................
Earth Ground
7. 8.
EXPLODED VIEWS ................................................ 72 ELECTRICAL PARTS LIST ............................... 79
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ! LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 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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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.
CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer's instructions. ADVARSEL! Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering. Udskiftning må kun ske med batteri af samme fabrikat og type. Levér det brugte batteri tilbage til leverandøren.
This caution label is located inside the unit.
ADVARSEL Eksplosjonsfare ved feilaktig skifte av batteri. Benytt samme batteritype eller en tilsvarende type anbefalt av apparatfabrikanten. Brukte batterier kasseres i henhold til fabrikantens instruksjoner. VARNING Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller en likvärdig typ som rekommenderas av apparattillverkaren. Kassera använt batteri enligt gällande föreskrifter.
CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
VAROITUS Paristo voi räjähtää, jos se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä käytetty paristo valmistajan ohjeiden mukaisesti. Flexible Circuit Board Repairing · Keep the temperature of the soldering iron around 270 °C during repairing. · Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). · Be careful not to apply force on the conductor when soldering or unsoldering. Notes on chip component replacement · Never reuse a disconnected chip component. · Notice that the minus side of a tantalum capacitor may be damaged by heat.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens. LASER DIODE AND FOCUS SEARCH OPERATION CHECK Carry out the "S curve check" in "CD section adjustment" and check that the S curve waveforms is output three times. Note: Be sure to connect all wires (including FFC) in the MD section before applying power or ICs may be damaged.
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MODEL IDENTIFICATION -- BACK PANEL --
Part No.
HOW TO OPEN THE DISC TABLE WHEN POWER SWITCH TURNS OFF.
In removing the front panel with the power not supplied, insert a flat-blade screwdriver into a hole at the bottom of loading section and rotate it counterclockwise. Then, draw out the disc table.
Model AEP, UK models Canadian model Singapore model US model Chinese model
Part No. 4-220-708-0s 4-220-708-1s 4-220-708-3s 4-220-708-4s 4-220-708-5s
disc table
flat-blade screwdriver
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CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP IN MD
· In cleaning the objective lens of optical pick-up, move the mechanism deck by the following method. Method: 1. Eject the disc, if loaded. 2. Disconnect the power cord from the socket to shut off the power supply. 3. Move the part C toward the direction D, while shifting the pawl in section A toward B using tweezers, etc. 4. Moving the part C freely, clean the objective lens at the position easy for cleaning.
A B
C
D
objective lens of optical pick-up
CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP IN CD
· In cleaning the objective lens of optical pick-up, move the mechanism deck by the following method. Method: 1. Eject the disc, if loaded. 2. Disconnect the power cord from the socket to shut off the power supply. 3. Rotating the gear in section A by your fingers clean the objective lens at the position easy for cleaning.
A section
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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 : Ground I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser) IOP : For measuring IOP (Check the deterioration of the optical pick-up laser) TEO : TRK error signal (Traverse adjustment) VC : Reference level for checking the signal RF : RF signal (Check jitter)
Mechanism deck
CN110 6P connector
5P Connector
RF
VC TEO IOP I+3V GND
RF VC TEO IOP I+3V GND
1 RF VC for TEO MDM-3 IOP 5 I+3V 1 VC RF TEO for IOP MDM-5 I+3V 6 GND
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IOP DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC171 OF BD (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 optical pick-up label. 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 Procedure: 1. Press the x (CD), [CLEAR] (CD), x (MD) and [CLEAR] (MD) buttons at the same time. 2. Press the [l AMS L ] (MD) knob and x (MD) button to display " <0> To Normal". 3. Turn the [ l AMS L ] (MD) knob and when " <5> MD Test" is displayed, press the [ l AMS L ] (MD) knob. 4. Turn the [ l AMS L ] (MD) knob to display "[Service]", and press the [YES] button. 5. Turn the [ l AMS L ] (MD) knob to display "Iop Write" (C28), and press the [YES] button. 6. The display becomes "Ref=@@@.@" (@ is an arbitrary number) and the numbers which can be changed will blink. 7. Input the IOP value written on the optical pick-up label. To select the number : Turn the [ l AMS L ] (MD) knob. To select the digit : Press the [ l AMS L ] (MD) knob. 8. When the [YES] button is pressed, the display becomes "Measu=@@@.@" (@ is an arbitrary number). 9. As the adjustment results are recorded for the 6 value. Leave it as it is and press the [YES] button. 10. "Complete!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write". 11. Press the ?/1 button to turn the power OFF. Display Procedure: 1. Press the x (CD), [CLEAR] (CD), x (MD) and [CLEAR] (MD) buttons at the same time. 2. Press the [ l AMS L ] (MD) knob and x (MD) button to display " <0> To Normal". 3. Turn the [ l AMS L ] (MD) knob and when " <5> MD Test" is displayed, press the [ l AMS L ] (MD) knob. 4. Turn the [ l AMS L ] (MD) knob to display "[Service]", and press the [YES] button. 5. Turn the [ l AMS L ] (MD) knob to display "Iop Read" (C27). 6. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ : indicates the IOP value on the optical pick-up label. ##.# : indicates the IOP value after adjustment 7. To end, press the [ l AMS L ] (MD) knob or [MENU/NO] button to display "Iop Read". Press the ?/1 button to turn the power OFF.
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CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS IN MD
Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in "5 Electrical Adjustments". Criteria for Determination (Unsatisfactory if specified value is not satisfied) Laser power check (6-2 : See page 32) · 0.9 mW power Specified value : 0.80 to 0.96 mW · 8.4 mW power Specified value : 8.2 to 8.6 mW Iop (at 8.4mW) · Labeled on the optical pick-up Iop value ± 10mA Traverse check (6-3 : See page 32) Focus bias check (6-4 : See page 33) · Traverse waveform Specified value : Below 10% offset · Error rate check Specified value : For points a, b, and c C1 error : About 200 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
· Replace the optical pick-up · Replace the optical pick-up
C PLAY check (6-5 : See page 33)
· Replace the optical pick-up
Self-recording/playback check (6-6 : See page 33)
If always unsatisfactory: · Replace the overwrite head · Check for disconnection of the circuits around the overwrite head If occasionally unsatisfactory: · Check if the overwrite head is distorted · Check the mechanism around the sled
Temperature compensation offset check (6-1 : See page 32)
· Unsatisfactory if displayed as T=@@ (##) [NG" NG (@@, ## are both arbitrary numbers)
· Check for disconnection of the circuits around D101 (BD (MD) board) · Check the signals around IC101, IC121, CN102, CN103 (BD (MD) board)
Note: The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments. When performing adjustments, use the specified values for adjustments.
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SERVICE MODE
This set provides various modes for the service. Enter the service mode through the procedure given below, and select the desired mode. Procedure: 1. Press the x (CD), [CLEAR] (CD), x (MD) and [CLEAR] (MD) buttons at the same time. 2. Press the [ l AMS L ] (MD) knob and x (MD) button to display " <0> To Normal". 3. At this time, rotating the [ l AMS L ] (MD) knob can select all modes. For the contents of mode, see the following table. 4. To exit from the service mode, press the x (MD) button and [l AMS L] (MD) knob simultaneously to display "<0> To Normal", then press the [ l AMS L ] (MD) knob. If this operation failed, press the ?/1 button to turn the power OFF. Contents of test mode No. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Display <0> To Normal <1> Virsion <2> FLD <3> Key/Jog <4> CD Test 0> AGING 1> COMMAND 2> ERROR 3> SPEED X1 4> ISRC 5> CHECK8 6> AUTO G 7> HENSHIN 8> PORT 9> AMS A> TRK ON <5> MD Test <6> Retry & TOC <7> Initial <8> Special <9> Dump Function Exit from test mode Microcomputer Virsion display FL display test Key/Jog input test CD all sorts test CD aging mode Command transfer menu C1, C2 error display Disc speed selection ISRC display Check 8 cm display Auto gain display Decentiering display Port selection AMS display TRK ON/OFF display MD all sorts test MD TOC off & Retry test All reset Command, Sircs test Microcomputer Dump mode
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Microcomputer Version Display Procedure: 1. Enter the service mode, then rotate [ l AMS L ] (MD) knob to display "<1> Version", and press the [ l AMS L ] (MD). 2. The CD and MD microcomputer versions are displayed on the upper line and lower line respectively. 3. To exit from the mode, press the x (MD) button and [ l AMS L ] (MD) knob simultaneously. FL Display Test Procedure: 1. Enter the service mode, then rotate [ l AMS L ] (MD) knob to display "<2> FLD", and press the [ l AMS L ] (MD). 2. The fluorescent display tube turns ON fully. Each time the [ l AMS L ] (MD) knob is pressed, the display changes such as [Full ON] t [Partial ON] t [Selected menu]. 3. To exit from the mode, press the x (MD) button and [ l AMS L ] (MD) knob simultaneously. Key/Jog Input Test Procedure: 1. Enter the service mode, then rotate [ l AMS L ] (MD) knob to display "<3> Key/Jog", and press the [ l AMS L ] (MD). 2. KEY=29 is displayed, and each time a key is pressed, the corresponding pictograph goes off and numeric value is counted down. When all keys were pressed, KEY=0 is displayed. Correspondence between KEY and pictorial display KEY l AMS L (CD) x (CD) X (CD) H (CD) ?/1 PLAY MODE CD TIME CD CLEAR (CD) REC-IT (CD) M (CD) Pictorial display KEY m (CD) l AMS L (MD) CLEAR (MD) TIME MD PLAY MODE MD INPUT DISPLAY m (MD) YES MENU/NO Pictorial display (CD) KEY CD SYNCHRO HIGH CD SYNCHRO NORMAL A OPNE/CLOSE x (MD) X (MD) H (MD) M (MD) REC z (MD) A EJECT Pictorial display X4 SYNC
[DISC] (upper) [CD]
X (upper) H (upper)
[DISC] (under) [TRACK] (under)
MONO L.SYNC COAX ANALOG (MD) TOC
[MD]
X (under) H (under) (MD)
[OVER]
OPT CD
[TRACK]
(upper) REC IT (CD)
[REC]
[EDIT]
Software Reset Procedure: 1. Enter the service mode, then rotate [ l AMS L ] (MD) knob to display "<6> Initial", and press the [ l AMS L ] (MD). 2. The microcomputer resets the software, and the power is turned off.
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RETRY CAUSE DISPLAY MODE IN MD
· In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. During playback, the "track mode" for obtaining track information will be set. This is useful for locating the faulty part of the unit. · The following will be displayed : During recording and stop : Retry cause, number of retries, and number of retry errors. During playback : Information such as type of disc played, part played, copyright. These are displayed in hexadecimal. Procedure: 1. Load a recordable disc whose contents can be erased into the unit. 2. Press the [MENU/NO] button. When "Edit Menu" is displayed on the fluorescent indicator tube, turn the [l AMS L] (MD) knob to display "All Erase?". 3. Press the [YES] button. (Or press the [ l AMS L ] (MD) knob) 4. When "All Erase??" is displayed on the fluorescent indicator tube, the music calendar number blinks. 5. Press the [YES] button to display "Complete!!", and press the x (MD) button immediately. Wait for about 15 seconds while pressing the button. (The [ l AMS L ] (MD) knob can be pressed instead of the [YES] button for the same results) 6. When the "TOC" displayed on the fluorescent display tube goes off, release th x (MD) button. 7. Press the [REC z] button to start recording. Then press the X (MD) button and start recording. 8. To check the "track mode", press the H (MD) button to start play. 9. To release the test mode, press the ?/1 button, and turn OFF the power. When "TOC" disappears, disconnect the power plug from the outlet.
Fig. 1 Reading the Test Mode Display (During recording and stop)
RTs@@c##e** Fluorescent indicator tube display @@ : Cause of retry ## : Number of retries ** : Number of retry errors
Fig. 2 Reading the Test Mode Display (During playback)
@@ ###** $$ Fluorescent indicator tube display @@ : ## : ** : $$ : Parts No. (name of area named on TOC) Cluster Sector Address Track mode (Track information such as copyright information of each part)
Reading the Retry Cause Display Hexa1 decimal b7 b6 b5 b4 b3 b2 b1 b0 4 0 0 0 0 0 0 1 0 2 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 8 0 0 0 1 0 0 0 0 4 0 0 1 0 0 0 0 0 2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 01 02 04 08 10 20 40 80 Higher Bits Lower Bits Cause of Retry shock ader5 Occurring conditions When track jump (shock) is detected When ADER was counted more than five times continuously
Hexadecimal 8 Bit Binary
Discontinuous address When ADIP address is not continuous When DIN unlock is detected DIN unlock FCS incorrect IVR rec error CLV unlock Access fault When not in focus When ABCD signal level exceeds the specified range When CLV is unlocked When access operation is not performed normally
Reading the Display: Convert the hexadecimal display into binary display. If more than two causes, they will be added. Example When 42 is displayed: Higher bit: 4 = 0100 t b6 Lower bit : 2 = 0010 t b1 In this case, the retry cause is combined of "CLV unlock" and "ader5". When A2 is displayed: Higher bit: A = 1010 t b7 + b5 Lower bit : 2 = 0010 t b1 The retry cause in this case is combined of "access fault", "IVR rec error", and "ader5".
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Reading the Retry Cause Display Higher Bits Lower Bits HexaHexadecimal 8 4 2 1 8 4 2 1 decimal Bit b7 b6 b5 b4 b3 b2 b1 b0 Binary 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 01 02 04 08 10 20 40 80 Monaural This is 2-bit display. Normally 01. 01:Normal audio. Others:Invalid Audio (Normal) Original Copyright Write prohibited Invalid Digital copy No copyright Write allowed Details When 0 Emphasis OFF Stereo When 1 Emphasis ON
Reading the Display: Convert the hexadecimal display into binary display. If more than two causes, they will be added. Example When 84 is displayed: Higher bit : 8 = 1000 t b7 Lower bit : 4 = 0100 t 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 t All 0 Lower bit : 7 = 0111 t 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 t 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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CD-TEXT TEST DISC
This unit is able to display the test data (character information) written in the CD on its fluorescent indicator tube. The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used for checking the display. To check, perform the following procedure. Checking Method: 1. Turn ON the power, set the disc to the disc table with the "test disc" label facing up, and chuck the disc. 2. Press the H (CD) button and play back the disc. 3. The following will be displayed on the fluorescent indicator tube. Display : 1KHZ 0DB 4. Rotating [ l AMS L ] (CD) knob, select the track. The text data of each track will be displayed. For details of the displayed contents for each track, refer to "Table 1 : CD-TEXT TEST DISC TEXT Data Contents" and "Table 2 : CDTEXT TEST DISC Recorded Contents and Display". Restrictions in CD-TEXT Display In this unit, some special characters will not be displayed properly. These will be displayed as a space or a character resembling it. For details, refer to "Table 2 : CD-TEXT DISC Recorded Contents and Display". Table 1 : CD-TEXT TEST DISC TEXT Data Contents (TRACKS No. 1 to 41:Normal Characters) TRACK No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Displayed Contents 1kHz/0dB/L&R 20Hz/0dB/L&R 40Hz/0dB/L&R 100Hz/0dB/L&R 200Hz/0dB/L&R 500Hz/0dB/L&R 1kHz/0dB/L&R 5kHz/0dB/L&R 7kHz/0dB/L&R 10kHz/0dB/L&R 16kHz/0dB/L&R 18kHz/0dB/L&R 20kHz/0dB/L&R 1kHz/0dB/L&R 1kHz/-1dB/L&R 1kHz/-3dB/L&R 1kHz/-6dB/L&R 1kHz/-10dB/L&R 1kHz/-20dB/L&R 1kHz/-60dB/L&R 1kHz/-80dB/L&R TRACK No. 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 Displayed Contents 1kHz/-90dB/L&R Infinity Zero w/o emphasis//L&R Infinity Zero with emphasis//L&R 400Hz+7kHz(4:1)/0dB/L&R 400Hz+7kHz(4:1)/-10dB/L&R 19kHz+20kHz(1:1)/0dB/L&R 19kHz+20kHz(1:1)/-10dB/L&R 100Hz/0dB/L* 1kHz/0dB/L* 10kHz/0dB/L* 20kHz/0dB/L* 100Hz/0dB/R* 1kHz/0dB/R* 10kHz/0dB/R* 20kHz/0dB/R* 100Hz Squer Wave//L&R 1kHz Squer Wave//L&R 1kHz w/emphasis/-0.37dB/L&R 5kHz w/emphasis/-4.53dB/L&R 16kHz w/emphasis/-9.04dB/L&R
Note: The contents of Track No. 1 to 41 are the same as those of the current TEST DISC-their titles are displayed.
15
Table 2: CD-TEXT TEST DISC Recorded Contents and Display (In this unit, some special characters cannot be displayed. This is not a fault) TRACK No. 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 to 99
·
Recorded contents ! " # $%& ´ ( ) (21h to 27h)1kHz 0dB L&R (28h to 2Fh) (30h to 37h) (38h to 3Fh) (40h to 47h) (48h to 4Fh) (58h to 5Fh) (60h to 67h) (68h to 6Fh) (70h to 77h) (78h to 7Fh) (A0h to A7h) 8859-1 (A8h to AFh) (B0h to B7h) (B8h to BFh) (C0h to C7h) (C8h to CFh) (D0h to D7h) (D8h to DFh) (E0h to E7h) (E8h to FFh) (F0h to F7h) (F8h to FFh) AAAAAA DNOOOOO O UUUUY aaaaaa dnooooo ouuuu y y T All the same T All the same to T All the same c eeee i i i i C EEEE I I I I T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same
Display
*
+ , . /
01234567 89 : ; <=>? @A B C D E F G H I J K L MNO XYZ [ ¥ ] ^ _
P Q R S T U V W (50h to 57h)
ab c de f g
h i j k l mn o pq r s t u vw x y z { I } ~ i ¢£¤¥ § C ª ¬ PR ±
1 2 3
(A0h to A7h) 8859-1 (A8h to AFh) (B0h to B7h) (B8h to BFh) (C0h to C7h) (C8h to CFh) (D0h to D7h) (D8h to DFh) (E0h to E7h) (E8h to EFh) (F0h to F7h) (F8h to FFh)
1 4
µ¶ ·
1 2 3 4
º
¿
À Á Â Ã Ä Å ÆÇ È ÉÊË Ì Í Î Ï D ÑÒÓÔÕÖ ØÙÚÛÜY ß à á â ã ä åæç è éêë ì í î ï ñòóôõö÷ ø ùúûü y ´ No.66 No.67 to No.99 ÿ
16
SECTION 2 GENERAL
Front view 1 2 3 4 5 67 8 9 0 qa qs qd Rear view
ed es
ea wl wk wh e; wj wg
wf wd
ws w;ql qjqhqg qf wa qk
12 3
4
5
1 2 3 4 5 6 7 8 9 0 qa qs qd qf qg qh qj qk ql w; wa ws wd wf wg wh wj wk wl e; ea es ed
?/1 (power) switch REC-IT button CD disc tray Display window A OPEN/CLOSE button CD SYNC NORMAL button CD SYNC HIGH button MENU/NO button MD insertion slot YES button A EJECT button PHONE LEVEL control PHONES jack REC z button x button X button H button m/M button AMS control CLEAR button MD TIME button MD PLAY MODE button INPUT button DISPLAY button CD PLAY MODE button CD TIME button CLEAR button AMS control x button X button H button m/M button Remote sensor
1 2 3 4 5
LINE (ANALOG) IN jack LINE (ANALOG) OUT jack DIGITAL OPTICAL IN terminal VOLTAGE SELECTOR switch (singapore model only) AC power cord
17
SECTION 3 DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
LOADING PANEL
In removing the front panel with the power not supplied, insert a flat-blade screwdriver into a hole at the bottom of loading section and rotate it counterclockwise. Then, draw out the disc table and remove the loading panel. 3 Remove the loading panel to direction of the arrow.
2 1
COVER, FRONT PANEL SECTION
1 two screws (case3 TP2)
CD MECHANISM DECK SECTION (Page 19) MD MECHANISM DECK SECTION (Page 21) MAIN BOARD (Page 23)
1 two screws (case3 TP2)
2 cover
1 two screws (case3 TP2)
7 two claws 5 three screws (BVTT3 × 6) 3 wire (flat type) (19 core) (CN604)
6 lug
8 front panel section
4 connector (CN451)
7 two claws
5 six screws (BVTT3 × 6)
18
CD MECHANISM DECK SECTION (CDM14H-5TBD26B)
4 three screws (BVTT3 × 6) 3 lead (with connector) B 6 Pulling the front panel in the direction of the arrow A a little, remove the mechanism deck (CDM14H-5TBD26B) in the direction of the arrow B. Note: Don't pull the front panel in the direction of the arrow A by force.
5 Push the disc table.
4 three screws (BVTT3 × 6)
1 wire (flat type) (29 core) (CN501)
A 2 connector (CN502)
CHASSIS (MD)
4 Remove the chassis (MD) to direction of the arrow A. 3 yoke bracket A
1 Rotate the cam counterclockwise with a flat-blade screwdriver.
cam
2 Pull out the disc table.
19
CD BASE UNIT (BU-5TBD26B)
1 two screws (PTPWHM2.6) 1 two screws (PTPWHM2.6)
2 CD base unit (BU-5TBD26B)
3 two compression springs (932)
3 two compression springs (932)
4 chassis (MD)
BD (CD) BOARD
3 two screws (P2 × 3)
Note: When routing the lead wires of spindle motor, pass them through a slot in the BD (CD) board, then solder to the motor. Then, secure the lead wires to the IC191 with an adhesive sheet so as not to be loose, as shown in the figure. adhesive sheet motor leads IC191
1 wire (flat type) (16 core) (CN102)
5 BD (CD) board
spindle motor
2 Remove two solders of spindle motor leads. 4 screw (BVTP2.6 × 8)
20
MD MECHANISM DECK SECTION (MDM-5X2B)
5 four step screws (BVTTWH M3)
6 Remove the MD mechanism deck (MDM-5X2B) to direction of the arrow.
1 wire (flat type) (27 core) (CN602)
1 wire (flat type) (23 core) (CN601)
2 connector (CN603)
3 screw (BVTT3 × 6)
4 lug
SLIDER (CAM)
7 slider (Cam)
· Note for Installation of Slider A (Cam)
4 bracket (Guide L)
Set the shaft of Cam gear to be at the position in the figure.
1 two screws (P2.6 × 6)
2 lug
Set the shaft of Lever (O/C) to be at the position in the figure.
3 leaf spring 5 two screws (P2.6 × 6)
6 bracket (Guide R)
21
MD BASE UNIT (MBU-5X2B), BD (MD) BOARD
2 base unit (MBU-5X2B) 5 flexible board (CN104)
6 flexible board (CN101) 1 three screws (P2.6 × 6)
7 BD (MD) board 4 screw (M1.7 × 4)
3 Remove the solder (Seven portion).
SW BOARD, LOADING MOTOR (M203)
2 gear B 3 two screws (PWH1.7 × 4)
1 screw (PTPWH M2.6 × 6)
4 loading motor (M203) 6 SW board
5 three screws (BTP2.6 × 6)
22
MAIN BOARD
2 three connectors (CN603, 901, 902) 1 wire (flat type) (29 core) (CN501) 3 screw (BVTT3 × 6) 1 wire (flat type) (19 core) (CN604) 2 connector (CN451) 2 connector (CN502) 3 screw (BVTT3 × 6)
1 wire (flat type) (27 core) (CN602) 6 MAIN board
4 two screws (BVTP3 × 8)
1 wire (flat type) (23 core) (CN601)
5 two PC board holders
MEASURE AGAINST HEAT FROM HEAT SINK
When connecting the cable from TRANS board (CN101) to MAIN board (CN902), cross it with the cable between SW board (CN601) and MAIN board (CN603), as shown in the figure.
TRANS board
heat sink
CN101
CN902 CN601 CN603 SW board
#
MAIN board
23
SECTION 4 TEST MODE
MD SECITON
Note: MD always plays double speed.
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 [A EJECT] button is pressed while the disc is rotating during continuous playback, continuous recording, etc., the disc will not stop rotating. Therefore, it will be ejected while rotating. Be sure to press the [A EJECT] button after pressing the [MENU/NO] button and the rotation of disc is stopped. 1-1. Recording laser emission mode and operating buttons · Continuous recording mode (CREC MODE) · Laser power check mode (LDPWR CHECK) · Laser power adjustment mode (LDPWR ADJUS) · Traverse (MO) check (EF MO CHECK) · Traverse (MO) adjustment (EF MO ADJUS) · When pressing the [REC z ] button.
2. SETTING THE TEST MODE
The following are two methods of entering the test mode. Procedure 1: Press the x (CD), [CLEAR] (CD), x (MD) and [CLEAR] (MD) buttons at the same time. Press the [ l AMS L ] (MD) knob and x (MD) button to display " < 0 > To Normal". Turn the [ l AMS L ] (MD) knob and when " < 5 > MD Test" is displayed, press the [ l AMS L ] (MD) knob. When the test mode is set, "[Check]" will be displayed. Turn the [ l AMS L ] (MD) knob switches between the following four groups; ···Tt [Check] Tt [Adjust] Tt [Service] Tt [Develop] Tt ···. Procedure 2: While pressing the [ l AMS L ] (MD) knob, connect the power plug to the outlet and release the [ l AMS L ] (MD) knob. When the test mode is set, "TEMP CHECK" will be displayed. By setting the test mode using this method, only the "Check" group of method 1 can be executed.
3. RELEASING THE TEST MODE
Press the ?/1 button to turn the power OFF. (with initialize)
4. BASIC OPERATIONS OF THE TEST MODE All operations are performed using the [ l AMS L ] (MD) knob, [YES] button, and [MENU/NO] button.
The functions of these buttons are as follows.
Function name
l AMS L knob (MD)
Function Changes parameters and modes Proceeds onto the next step. Finalizes input. Returns to previous step. Stops operations.
YES button MENU/NO button
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5. SELECTING THE TEST MODE
There are 31 types of test modes as shown below. The groups can be switched by turning the [l AMS L] (MD) knob. After selecting the group to be used, press the [YES] button. After setting a certain group, turn the [ l AMS L ] (MD) knob switches between these modes. Refer to "Group" in the table for details can be selected. All items used for servicing can be treated using group S. So be carefully not to enter other groups by mistake.
Display TEMP CHECK LDPWR CHECK EF MO CHECK EF CD CHECK FBIAS CHECK Scurve CHECK VERIFYMODE DETRK CHECK TEMP ADJUS LDPWR ADJUS EF MO ADJUS EF CD ADJUS FBIAS ADJUS EEP MODE MANUAL CMD SVDATA READ ERR DP MODE SLED MOVE ACCESS MODE 0920 CHECK HEAD ADJUST CPLAY 1MODE CREC 1MODE ADJ CLEAR AG Set (MO) AG Set (CD) Iop Read Iop Write INFORMATION CPLAY MODE CREC MODE No. C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 Laser power check Traverse (MO) check Traverse (CD) check Focus bias check S letter check Non-volatile memory check Detrack check Temperature compensation offset adjustment Laser power adjustment Traverse (MO) adjustment Traverse (CD) adjustment Focus bias adjustment Non-volatile memory control Command transmission Status display Error history display, clear Sled check Access check Outermost circumference check Head position check Same functions as CPLAY MODE (Not used in servicing) Same functions as CREC MODE (Not used in servicing) Initialization of non-volatile memory of adjustment value Auto gain output level adjustment (MO) Auto gain output level adjustment (CD) IOP data display IOP data write Microprocessing version display Continuous playback mode Continuous recording mode C C C A A C A (X) (X) (X) (X) (X) (X) A A A S S S S S S S S D D (X) (!) (X) (X) S D D D D D D (X) (X) (X) Contents Temperature compensation offset check Mark C C C C C C C C A A A A A S S S S S D D D Group (*) S S S S S
Group (*) C: Check S: Service
A: Adjust D: Develop
· For details of each adjustment mode, refer to "5. Electrical Adjustments". For details of "ERR DP MODE", refer to "Self-Diagnosis Function" on page 2. · If a different mode has been selected by mistake, press the [MENU/NO] button to release that mode. · Modes with (X) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set accidentally, press the [MENU/NO] button to release the mode immediately. Be especially careful not to set the modes with (!) as they will overwrite the non-volatile memory and reset it, and as a result, the unit will not operate normally.
25
5-1. Operating the Continuous Playback Mode 1. Entering the continuous playback mode (1) Set the disc in the unit. (Whichever recordable discs or discs for playback only are available) (2) Turn the [ l AMS L ] (MD) knob and display "CPLAY MODE" (C30). (3) Press the [YES] button to change the display to "CPLAY MID". (4) When access completes, the display changes to "C = AD = ".
Note: The numbers " " displayed show you error rates and ADER.
2. Changing the parts to be played back (1) Press the [YES] button during continuous playback to change the display as below. "CPLAY MID" t "CPLAY OUT" t "CPLAY IN" When pressed another time, the parts to be played back can be moved. When access completes, the display changes to "C = AD = ".
Note: The numbers " " displayed show you error rates and ADER.
(2)
3. Ending the continuous playback mode (1) Press the [MENU/NO] button. The display will change to "CPLAY MODE". (2) Press the [A EJECT] button and take out the disc.
Note: The playback start addresses for IN, MID, and OUT are as follows.
IN 40h cluster MID 300h cluster OUT 700h cluster 5-2. Operating the Continuous Recording Mode (Use only when performing self-recording/palyback check) 1. Entering the continuous recording mode (1) Set a recordable disc in the unit. (2) Turn the [ l AMS L ] (MD) knob and display "CREC MODE". (3) Press the [YES] button to change the display to "CREC MID" (C31). " and " REC " lights up. (4) When access completes, the display changes to "CREC (
Note: The numbers " " displayed shows you the recording position addresses.
2. Changing the parts to be recorded (1) When the [YES] button is pressed during continuous recording, the display changes as below. "CREC MID" t "CREC OUT" t "CREC IN" When pressed another time, the parts to be recorded can be changed. " REC " goes off. " and " REC " lights up. When access completes, the display changes to "CREC (
Note: The numbers " " displayed shows you the recording position addresses.
(2)
3. Ending the continuous recording mode (1) Press the [MENU/NO] button. The display changes to "CREC MODE" and " REC " goes off. (2) Press the [A EJECT] button and take out 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.
5-3. Non-Volatile Memory Mode (EEP MODE) This mode reads and writes the contents of the non-volatile memory. It is not used in servicing. If the unit entered this mode accidentally, press the [MENU/NO] button immediately to release it.
26
6. FUNCTIONS OF OTHER BUTTONS
Function H (MD) x (MD) M (MD) m (MD) CLEAR (MD) PLAY MODE (MD) DISPLAY A EJECT ?/1 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 y CLV-A). Switches the displayed contents each time the button is pressed Ejects the disc Releases the test mode
7. TEST MODE DISPLAYS Each time the [DISPLAY] button is pressed, the display changes in the following order.
1. Mode display Displays "TEMP ADJUS", "CPLAYMODE", etc.
Mode display
2. Error rate display Displays the error rate in the following way. C = ssss AD = ss C = Indicates the C1 error. AD = Indicates ADER. 3. Address display The address is displayed as follows. (MO: recordable disc, CD: playback only disc) Press the [CLEAR] (MD) button to switches between the groove display and pit display. h = ssss s = ssss (MO pit and CD) h = ssss a = ssss (MO groove) h = Indicates the header address. s = Indicates the SUBQ address. a = Indicates the ADIP address.
Note: "" is displayed when servo is not imposed.
Error rate display Address display Auto gain display (Not used in servicing) Detrack check display (Not used in servicing) IVR display (Not used in servicing)
4. Auto gain display (Not used in servicing) The auto gain is displayed as follows. AG = ss/ss[ ss 5. Detrack check display (Not used in servicing) The detrack is displayed as follows. ADR = sssssss 6. IVR display (Not used in servicing) The IVR is displayed as follows. [ss][ss][ss
27
MEANINGS OF OTHER DISPLAYS
Display H X REC SYNC L.SYNC OVER REP 1 DISC (under) SHUF MONO TOC EDIT 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 Groove Low reflection CLV-A CLV UNLOCK High reflection CLV-S CLV LOCK Jitter monitor Tracking offset cancel OFF STOP (CLV: OFF) Tracking servo ON Recording mode OFF CLV normal mode When Off
TRACK (under) Pit
CD SECTION
Set the CD test mode when performing confirmations. After completing confirmation, release the CD test mode.
1. AGING MODE
This mode repeatedly opens and closes the CD tray, and plays CD. This operation is repeated unless an error occurs. If an error occurred, the aging stops. Procedure: (1) Set a disc in advance. (2) Enter the test mode, then rotate [ l AMS L ] (CD) knob to display "0> AGING", and press the [ l AMS L ] (CD). (3) When "AGING **" is displayed on the FL tube, rotate [ l AMS L ] (CD) knob so that ** portion becomes 00. (4) Press the [ l AMS L ] (CD), and the aging is executed through the following sequence. Aging sequence 00: Normal 01: Normal + Exchange (not used) 02: Never mind 03: Never mind 04: BD access 05: Sound skip 06: Reverse to normal (5) To finish the aging, press the x (CD) button.
2. COMMAND TRANSFER MENU
Procedure: (1) Enter the test mode, then rotate [l AMS L ] (CD) knob to display "1> COMMAND", and press the [ l AMS L ] (CD) knob. (2) Select a command with [ l AMS L ] (CD) knob, and press the [ l AMS L ] (CD) knob to set. (3) Select the edit position with m (CD) and M (CD) buttons, and rotate [ l AMS L ] (CD) knob for editing, then press the [l AMS L ] (CD) knob for transfer. (4) To exit from this mode, press x (MD) button and [ l AMS L ] (MD) knob simultaneously.
3. C1, C2 ERROR DISPLAY
Procedure: (1) Enter the test mode, then rotate [l AMS L ] (CD) knob to display "2> ERROR", and press the [l AMS L ] (CD) knob. (2) C1 error and C2 error are displayed on the left side and right side with 4-digit codes respectively. (3) To exit from this mode, press x (MD) button and [ l AMS L ] (MD) knob simultaneously.
4. DISC SPEED SELECTION
Procedure: (1) Enter the test mode, then rotate [l AMS L] (CD) knob to display "3> SPEEDx1", and press the [l AMS L] (CD) knob. (2) Each time the [ l AMS L ] (CD) knob is pressed, the speed changes over such as x1 t x2 t x4 t x1. (3) To exit from this mode, press x (MD) button and [l AMS L ] (MD) knob simultaneously.
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5. ISRC DISPLAY
Procedure: (1) Enter the test mode, then rotate [ l AMS L ] (CD) knob to display "4> IRSC", and press the [ l AMS L] (CD) knob. (2) Rotating the [ l AMS L ] (CD) knob counterclockwise displays higher-order 5 digits, or clockwise displays lower-order 7 digits. (3) To exit from this mode, press x (MD) button and [ l AMS L ] (MD) knob simultaneously.
6. CHECK 8 cm DISPLAY
Procedure: (1) Enter the test mode, then rotate [l AMS L] (CD) knob to display "5> CHECK 8", and press the [l AMS L] (CD) knob. (2) To check the disc size (8 cm or 12 cm), the value is displayed. (3) To exit from this mode, press x (MD) button and [ l AMS L ] (MD) knob simultaneously.
7. PORT SELECTION
Procedure: (1) Enter the test mode, then rotate [ l AMS L ] (CD) knob to display "8> PORT", and press the [ l AMS L ] (CD) knob. (2) Rotate the [ l AMS L ] (CD) knob to select GFS, ERROR RATE, RFCK and press the [ l AMS L ] (CD) knob to set. (3) To exit from this mode, press x (MD) button and [l AMS L ] (MD) knob simultaneously.
29
SECTION 5 ELECTRICAL ADJUSTMENTS
MD SECTION
Note: MD always plays double speed.
1. PARTS REPLACEMENT AND ADJUSTMENT
· Check and adjust the mechanism deck as follows. The procedure changes according to the part replaced · Abbreviation OP : Optical pick-up OWH : Overwrite head
· Temperature compensation offset check · Laser power check · Traverse check · Focus bias check · C PLAY check · Self-recording/playback check OK
NG Parts Replacement and Repair
Check the sled and spindle mechanisms. Other causes can be suspected.
Has the OWH been replaced?
YES
NO
Has OP, IC171, IC101, or IC121 been replaced?
YES Initial setting of the adjustment value NO
Has OP or IC171 been replaced?
NO
YES IOP information recording (IOP value labeled on OP)
Has IC171 or D101 been replaced?
YES Temperature compensation offset adjustment
NO
· Laser power adjustment · Traverse adjustment · Focus bias adjustment · Error rate adjustment · Focus bias check · Auto gain adjustment
30
2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION
To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight.
3. PRECAUTIONS FOR USE OF OPTICAL PICK-UP (KMS-262A)
As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when using it. Before disconnecting the connector, desolder first. Before connecting the connector, be careful not to remove the solder. Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.
pick-up flexible board
4. Use the following tools and measuring devices. · Check Disc (MD) TDYS-1 (Part No. 4-963-646-01) · Test Disc (MDW-74/AU-1) (Part No. 8-892-341-41) · Laser power meter LPM-8001 (Part No. J-2501-046-A) or MD Laser power meter 8010S (Part No. J-2501-145-A) · Oscilloscope (Measure after performing CAL of prove) · Digital voltmeter · Thermometer · Jig for checking BD (MD) board waveform (Part No. : J-2501-149-A) 5. When observing several signals on the oscilloscope, etc., make sure that VC and ground do not connect inside the oscilloscope. (VC and ground will become short-circuited) 6. Using the above jig enables the waveform to be checked without the need to solder. (Refer to Servicing Notes on page 8) 7. As the disc used will affect the adjustment results, make sure that no dusts nor fingerprints are attached to it.
Laser power meter
When performing laser power checks and adjustment (electrical adjustment), use of the new MD laser power meter 8010S (Part No. J-2501-145-A) instead of the conventional laser power meter is convenient. It sharply reduces the time and trouble to set the laser power meter sensor onto the objective lens of optical pick-up.
laser tap
Optical pick-up flexible board
4. PRECAUTIONS FOR ADJUSTMENTS
1. When replacing the following parts, perform the adjustments and checks with a in the order shown in the following table.
Optical Pick-up IC171 1. Initial setting of adjustment value 2. Recording of IOP information (Value on the optical pick-up label) 3. Temperature compensation offset adjustment 4. Laser power adjustment 5. Traverse adjustment 6. Focus bias adjustment 7. Error rate check 8. Auto gain output level adjustment BD (MD) Board D101 IC101, IC121 IC192
5. CREATING CONTINUOUSLY-RECORDED DISC
* This disc is used in focus bias adjustment and error rate check. The following describes how to create a continuous recording disc. 1. Insert a disc (blank disc) commercially available. 2. Turn the [ l AMS L ] (MD) knob and display "CREC MODE". (C31) 3. Press the [YES] button again to display "CREC MID". Display "CREC (0300)" and start to recording. 4. Complete recording within 5 minutes. 5. Press the [MENU/NO] button and stop recording . 6. Press the [ A EJECT] button and remove the disc. The above has been how to create a continuous recorded data for the focus bias adjustment/check and MO error rate check.
Note : · Be careful not to apply vibration during continuous recording.
2. Set the test mode when performing adjustments. After completing the adjustments, release the test mode. Perform the adjustments and checks in "group S" of the test mode. 3. Perform the adjustments to be needed in the order shown.
31
6. CHECK PRIOR TO REPAIRS
These checks are performed before replacing parts according to "approximate specifications" to determine the faulty locations. For details, refer to "Checks Prior to Parts Replacement and Adjustments" (See page 10). 6-1. Temperature Compensation Offset Check When performing adjustments, set the internal temperature and room temperature of 22 °C to 28 °C. Checking Procedure: 1. Turn the [ l AMS L ] (MD) knob to display "TEMP CHECK" (C01). 2. Press the [YES] button. 3. "T=@@(##) [OK" should be displayed. If "T=@@ (##) [NG" is displayed, it means that the results are bad. (@@ indicates the current value set, and ## indicates the value written in the non-volatile memory) 6-2. Laser Power Check Before checking, check the IOP value of the optical pick-up. (Refer to 8. Recording and Displaying IOP Information) Connection :
laser power meter
Note 1: After step 4, each time the [YES] button is pressed, the display will be switched "LD 0.7 mW $ ", "LD 7.5 mW $ ", and "LD Wp $ ". Nothing needs to be performed here.
6-3. Traverse Check
Note 1:Data will be erased during MO reading if a recorded disc is used in this adjustment. Note 2:If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be seen more clearly. oscilloscope (DC range)
BD board CN110 pin 3 (TEO) CN110 pin 1 (VC)
330 k
+
10 pF
Connection :
oscilloscope (DC range) BD (MD) board CN110 pin 3 (TEO) CN110 pin 1 (VC)
+
V: 0.1 V/div H: 10 ms/div
Optical pick-up objective lens
digital voltmeter BD (MD) board CN110 pin 5 (I +3V) CN110 pin 4 (IOP)
+
Checking Procedure: 1. Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, press the m (MD) button or M (MD) button to move the optical pick-up) Connect the digital voltmeter to CN110 pin 5 (I+3V) and CN110 pin 4 (IOP) on the BD (MD) board. 2. Then, turn the [ l AMS L ] (MD) knob to display "LDPWR CHECK" (C02). 3. Press the [YES] button once to display "LD 0.9 mW $ ". Check that the reading of the laser power meter become 0.80 to 0.96 mW. 4. Press the [YES] (MD) button once more to display "LD 8.4 mW $ ". Check that the reading the laser power meter and digital voltmeter satisfy the specified value. Specified Value: Laser power meter reading : 8.4 ± 0.2 mW Digital voltmeter reading : Value on the optical pick-up label ±10%
(Optical pick-up label)
KMS262A 27X40 B0825
Checking Procedure: 1. Connect an oscilloscope to CN110 pin 3 (TEO) and CN110 pin 1 (VC) on the BD (MD) board. 2. Load a disc (any available on the market). (Refer to Note 1) 3. Press the M (MD) button to move the optical pick-up outside the pit. 4. Turn the [ l AMS L ] (MD) knob to display "EF MO CHECK"(C03). MO-R". 5. Press the [YES] button to display "EFB = (Laser power READ power/Focus servo ON/tracking servo OFF/spindle (S) servo ON) 6. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not turn the [ l AMS L] (MD) knob. (Read power traverse checking)
Traverse Waveform
A VC B Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
7. Press the [YES] button to display "EFB = MO-W". 8. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not turn the [ l AMS L ] (MD) knob. (Write power traverse checking)
Traverse Waveform
A VC B Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
lOP=82.5 mA in this case lOP (mA) = Digital voltmeter reading (mV)/1 ()
5. Press the [MENU/NO] button to display "LDPWR CHECK" and stop the laser emission. (The [MENU/NO] button is effective at all times to stop the laser emission)
32
9. Press the [YES] button to display "EFB = MO-P". Then, the optical pick-up moves to the pit area automatically and servo is imposed. 10. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not turn the [l AMS L] (MD) knob.
Traverse Waveform
A VC B Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
11. Press the [YES] button to display "EF MO CHECK" The disc stops rotating automatically. 12. Press the [ A EJECT] button and take out the disc. 13. Load the check disc (MD) TDYS-1. 14. Turn the [ l AMS L ] (MD) knob and display "EF CD CHECK" (C04). 15. Press the [YES] button to display "EFB = CD". Servo is imposed automatically. 16. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not turn the [l AMS L ] (MD) knob.
Traverse Waveform
A VC B Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
6-4. Focus Bias Check Change the focus bias and check the focus tolerance amount. Checking Procedure : 1. Load the test disk (MDW-74/AU-1). 2. Turn the [ l AMS L ] (MD) knob to display "CPLAY MODE" (C30). 3. Press the [YES] button twice to display "CPLAY MID". 4. Press the [MENU/NO] button when "C = AD = " is displayed. 5. Turn the [ l AMS L ] (MD) knob to display "FBIAS CHECK" (C05). 6. Press the [YES] button to display " / c = ". The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [c =] indicate the focus bias value. Check that the C1 error is below 50 and ADER is below 2. 7. Press the [YES] button to display " / b = ". Check that the C1 error is about 200 and ADER is below 2. 8. Press the [YES] button to display " / a = ". Check that the C1 error is about 200 and ADER is below 2. 9. Press the [MENU/NO] button, then press the [ A EJECT] button and take out the test disc. 6-5. C PLAY Check MO Error Rate Check Checking Procedure : 1. Load the test disk (MDW-74/AU-1). 2. Turn the [ l AMS L ] (MD) knob to display "CPLAY MODE" (C30). 3. Press the [YES] button to display "CPLAY MID". 4. The display changes to "C = AD = ". 5. If the C1 error rate is below 80, check that ADER is below 2. 6. Press the [MENU/NO] button to stop playback, then press the [ A EJECT] button and take out the test disc. CD Error Rate Check Checking Procedure : 1. Load the check disc (MD) TDYS-1. 2. Turn the [ l AMS L ] (MD) knob to display "CPLAY MODE" (C30). 3. Press the [YES] button twice to display "CPLAY MID". 4. The display changes to "C = AD = ". 5. Check that the C1 error rate is below 50. 6. Press the [MENU/NO] button to stop playback, then press the [ A EJECT] button and take out the check disc. 6-6. Self-Recording/playback Check Prepare a continuous recording disc using the unit to be repaired and check the error rate. Checking Procedure : 1. Load a recordable disc (blank disc). 2. Turn the [ l AMS L ] (MD) knob to display "CREC MODE" (C31). 3. Press the [YES] button to display "CREC MID". 4. When recording starts, lights up " REC " and display "CREC @@@@" (@@@@ is the address). 5. About 1 minute later, press the [MENU/NO] button to stop continuous recording. 6. Turn the [ l AMS L ] (MD) knob to display "CPLAY MODE" (C30). 7. Press the [YES] button to display "CPLAY MID". 8. "C = AD = " will be displayed. 9. Check that the C1 error becomes below 80 and the AD error below 2. 10. Press the [MENU/NO] button to stop playback, then press the [ A EJECT] button and take out the disc.
17. Press the [YES] button to display "EF CD CHECK". 18. Press the [ A EJECT] button and take out the check disc.
33
7. INITIAL SETTING OF ADJUSTMENT VALUE
Note: Mode which sets the adjustment results recorded in the non-volatile memory to the initial setting value. However the results of the temperature compensation offset adjustment will not change to the initial setting value. If initial setting is performed, perform all adjustments again excluding the temperature compensation offset adjustment. For details of the initial setting, refer to "4. Precautions on Adjustments" and execute the initial setting before the adjustment as required.
9. TEMPERATURE COMPENSATION OFFSET ADJUSTMENT
Save the temperature data at that time in the non-volatile memory as 25 °C reference data.
Note : 1. Usually, do not perform this adjustment. 2. Perform this adjustment in an ambient temperature of 22 °C to 28 °C. Perform it immediately after the power is turned on when the internal temperature of the unit is the same as the ambient temperature of 22 °C to 28 °C. 3. When D101 has been replaced, perform this adjustment after the temperature of this part has become the ambient temperature.
Setting Procedure : 1. Turn the [ l AMS L ] (MD) knob to display "ADJ CLEAR" (C24). 2. Press the [YES] button. "Complete!" will be displayed momentarily and initial setting will be executed, after which "ADJ CLEAR" will be displayed.
8. RECORDING AND DISPLAYING THE IOP INFORMATION
The IOP data can be recorded in the non-volatile memory. The IOP value on the optical pick-up label and the IOP value after the adjustment will be recorded. Recording these data eliminates the need to read the label on the optical pick-up. Recording Procedure : 1. Turn the [ l AMS L ] (MD) knob to display "Iop Write" (C28), and press the [YES] button. 2. The display becomes Ref=@@@.@ (@ is an arbitrary number) and the numbers which can be changed will blink. 3. Input the IOP value on the optical pick-up label. To select the number : Turn the [l AMS L] (MD) knob. To select the digit : Press the [ l AMS L] (MD) knob 4. When the [YES] button is pressed, the display becomes "Measu=@@@.@" (@ is an arbitrary number). 5. As the adjustment results are recorded for the 6 value. Leave it as it is and press the [YES] button. 6. "Complete!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write". Display Procedure : 1. Turn the [ l AMS L ] (MD) knob to display "Iop Read" (C27). 2. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ indicates the IOP value on the optical pick-up label. ##.# indicates the IOP value after adjustment 3. To end, press the [l AMS L] (MD) button or [MENU/NO] button to display "Iop Read".
Adjusting Procedure : 1. Turn the [ l AMS L ] (MD) knob to display "TEMP ADJUS" (C09). 2. Press the [YES] button to select the "TEMP ADJUS" mode. 3. "TEMP = [OK" and the current temperature data will be displayed. 4. To save the data, press the [YES] button. When not saving the data, press the [MENU/NO] button. 5. When the [YES] button is pressed, "TEMP = SAVE" will be displayed and turned back to "TEMP ADJUS" display then. When the [MENU/NO] button is pressed, "TEMP ADJUS" will be displayed immediately. Specified Value : The "TEMP = " should be within "E0 - EF", "F0 - FF", "00 0F", "10 - 1F" and "20 - 2F".
10. LASER POWER ADJUSTMENT
Check the IOP value of the optical pick-up before adjustments. (Refer to 8. Recording and Displaying IOP Information) Connection :
laser power meter
Optical pick-up objective lens
digital voltmeter BD (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 m (MD) button or M (MD) button to move the optical pick-up) Connect the digital voltmeter to CN110 pin 5 (I+3V) and CN110 pin 4 (IOP) on the BD (MD) board. 2. Turn the [ l AMS L ] (MD) knob to display "LDPWR ADJUS" (C10). (Laser power : For adjustment) 3. Press the [YES] button once to display "LD 0.9 mW $ ". 4. Turn the [l AMS L ] (MD) knob so that the reading of the laser power meter becomes 0.85 to 0.91 mW. Press the [YES] button after setting the range knob of the laser power meter, and save the adjustment results. ("LD SAVE $ " will be displayed for a moment) 5. Then "LD 8.4 mW $ " will be displayed.
34
6. Turn the [ l AMS L ] (MD) knob so that the reading of the laser power meter becomes 6.9 to 7.1 mW, press the [YES] button to save it.
Note: Do not perform the emission with 7.0 mW more than 15 seconds continuously. 7. Then, turn the [ l AMS L ] (MD) knob to display
11. TRAVERSE ADJUSTMENT
Note 1: Data will be erased during MO reading if a recorded disc is used in this adjustment. Note 2: If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be seen more clearly. oscilloscope (DC range)
"LDPWR CHECK" (C02). 8. Press the [YES] button once to display "LD 0.9 mW $ ". Check that the reading of the laser power meter become 0.85 to 0.91 mW. 9. Press the [YES] button once more to display "LD 8.4 mW $ ". Check that the reading the laser power meter and digital voltmeter satisfy the specified value. Note down the digital voltmeter reading value. Specified Value: Laser power meter reading : 8.4 ± 0.2 mW Digital voltmeter reading : Value on the optical pick-up label ±10%
(Optical pick-up label)
KMS262A 27X40 B0825
BD (MD) board CN110 pin 3 (TEO) CN110 pin 1 (VC)
330 k
+
10 pF
Connection :
oscilloscope (DC range) BD (MD) board CN110 pin 3 (TEO) CN110 pin 1 (VC)
+
V: 0.1 V/div H: 10 ms/div
lOP=82.5 mA in this case lOP (mA) = Digital voltmeter reading (mV)/1 ()
10. Press the [MENU/NO] button to display "LDPWR CHECK" and stop the laser emission. (The [MENU/NO] button is effective at all times to stop the laser emission.) 11. Turn the [l AMS L] (MD) knob to display "Iop Write" (C28). 12. Press the [YES] button. When the display becomes Ref=@@@.@ (@ is an arbitrary number), press the [YES] button to display "Measu=@@@.@" (@ is an arbitrary number). 13. The numbers which can be changed will blink. Input