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Service Manual
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MDS-JA555ES
SERVICE MANUAL
US Model Canadian Model AEP Model UK Model
Photo : GOLD
U.S. and foreign patents licensed from Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism MD Mechanism Type Base Unit Type Optical Pick-up Type
MDS-JA20ES MDM-6A MBU-5C KMS-260B/J1N
SPECIFICATIONS
MiniDisc digital audio system MiniDisc Semiconductor laser (=780 nm) Emission duration : continuous Laser output Less than 44.6 µW* * This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture. Laser diode properties Material: GaAlAs Revolutions (CLV) 400 rpm to 900 rpm Error correction ACIRC (Advanced Cross Interleave Reed Solomon Code) Sampling frequency 44.1 kHz Coding ATRAC (Adaptive TRansform Acoustic Coding) Modulation system EFM (Eight-to-Fourteen Modulation) Number of channels 2 stereo channels Frequency response 5 Hz to 20,000 Hz ± 0.3 dB Signal-to-noise ratio Over 105 dB during playback Wow and flutter Below measurable limit System Disc Laser Inputs Jack type LINE (ANALOG) IN DIGITAL IN OPT1 DIGITAL IN OPT2 DIGITAL IN COAXIAL Phono jacks Square optical connector jack Square optical connector jack Phono jack Input impedance Rated input Minimum input
47 k Optical wave length 660 nm Optical wave length 660 nm
500 mVrms
125 mVrms
75
0.5 Vp-p ±20%
-- Continued on next page --
MINIDISC DECK
MICROFILM
SAFETY CHECK-OUT
Output Jack type Stereo phone jacks Phono jacks Square optical connector jack Phono jack Rated output 28 mW 2 Vrms (at 50 k) 18 dBm Load impedance 32 Over 10 k Optical Wave length 660 nm 75
PHONES LINE(ANALOG) OUT DIGITAL OUT OPTICAL
After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, "metallized" knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.
LEAKAGE
The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 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. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The "limit" indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)
To Exposed Metal Parts on Set
DIGITAL OUT COAXIAL General Power requirements
0.5 Vp-p (at 75 )
Where purchased Continnental Europe and UK U.S.A. and Canada
Power requirements 220V 230V AC, 50/60 Hz 120 V AC, 60 Hz
2.
3.
Power consumption 24 W Dimensions (approx.)(w/h/d) incl. projecting parts and controls 430 × 125.5 × 375.5 mm (17 × 5 × 13 3/4 in.) Mass (approx.) 15.3 kg (33 lbs 11 oz) Supplied accessories · Audio connecting cords (2) · Remote commander (remote) RM-D34M (1) · R6 (size-AA) batteries (2) Design and specifications are subject to change without notice.
CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the equipment manufacturer. Discard used batteries according to manufacture's instructions. ADVARSEL! Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering. Udskiftning må kun ske med batteri af samme fabrikat og type. Levér det brugte batteri tilbage til leverandøren. ADVARSEL Eksplosjonsfare ved feilakting skifte av batteri. Benytt samme batteritype eller en tilsvarende type anbefalt av apparatfabrikanten. Brukte batterier katterier kasseres i henhold til fabrikantens VARNIG Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller en likvärdig typ som rekommenderas av apparattillverkaren. Kassera använt batteri enligt gällande föreakrifter. VAROITUS Parist voi räjähtää, jos se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
0.15 µF 1.5 k
AC Voltmeter (0.75 V)
Earth Ground Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ! LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
2
Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.
TABLE OF CONTENTS 1. SERVICING NOTE ·························································· 6 2. GENERAL ········································································ 12 3. DISASSEMBLY
3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. 3-10. 3-11. Case ·················································································· 14 Loading Panel ··································································· 14 Front Panel Assembly ······················································· 15 MD Mechanism Deck ······················································ 15 Tray Assembly ·································································· 16 BU Holder Assembly ························································ 17 Motor (Loading) Assembly (M10) ··································· 17 Base Unit (MBU-5C) ······················································· 18 BD Board ·········································································· 18 Over Light Head (HP901) ················································ 19 Mini Disc Device (KMS-260B/JN) ·································· 19
This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. The following caution label is located inside the unit.
4. TEST MODE ···································································· 20 5. ELECTRICAL ADJUSTMENTS ······························· 25 6. DIAGRAMS
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. 6-1. Block Diagrams BD Section ······································································· 34 MAIN Section ·································································· 35 Display/Power Supply Section ········································· 36 6-2. Circuit Boards Location ··················································· 37 6-3. Printed Wiring Board BD Section ································· 38 6-4. Schematic Diagram BD (2/1) Section ··························· 39 6-5. Schematic Diagram BD (2/1) Section ··························· 40 6-6. Schematic Diagram BD Switch Section ························ 41 6-7. Printed Wiring Board BD Switch Section ····················· 41 6-8. Printed Wiring Board AD Section ································· 42 6-9. Schematic Diagram AD (2/1) Section ··························· 43 6-10. Schematic Diagram AD (2/1) Section ··························· 44 6-11. Schematic Diagram DA (2/1) Section ··························· 45 6-12. Printed Wiring Board DA Section ································· 48 6-13. Schematic Diagram DA (2/1) Section ··························· 47 6-14. Printed Wiring Board Digital Section ··························· 48 6-15. Schematic Diagram Digital Section ····························· 50 6-16. Printed Wiring Board AC Section ································· 51 6-17. Schematic Diagram Power Section ······························ 52 6-18. Printed Wiring Board Power Section ···························· 53 6-19. Printed Wiring Board Panel Section ······························ 54 6-20. Schematic Diagram Panel Section ································ 55 6-21. IC Block Diagrams ··························································· 57 6-22. IC Pin Functions ······························································· 62
MODEL IDENTIFICATION -- BACK PANEL --
Parts No.
7. EXPLODED VIEWS
7-1. 7-2. 7-3. 7-4. 7-5. 7-6. Upper Case Assembly ······················································ 71 Front Panel Assembly ······················································· 72 Chassis Assembly ····························································· 73 Mechanism Deck Assembly-1 (MDM-6A) ······················ 74 Mechanism Deck Assembly-2 (MDM-6A) ······················ 75 Base Unit (MBU-5C) ······················································· 76
4-220-300-1 4-220-300-2 4-220-300-3
: AEP, UK model : US model : Canadian model
8. ELECTRICAL PARTS LIST ······································· 77
3
SELF-DIAGNOSIS FUNCTION
The self-diagnosis function consists of the error codes for users and those for service engineers. The error codes for users appear automatically when an error occurs. The error codes for service engineers can be accessed by entering the test mode during servicing and by viewing the error history display. The error codes for users are shown below that are extracted from Operation Manual. For the error codes for service engineers, refer to the subsequent paragraph "How to Operate the Self-diagnosis Function (Error History Display Mode)".
How to Operate Self-diagnosis Function (Error History Display Mode) Note: The self-diagnosis function is performed using the "error history display mode" using the test mode. The following procedure describes only the minimum required operating procedure to enter the error history mode. Therefore be careful not to enter any other modes by mistake. If you have entered any other modes by mistake, press the MENU/NO button and exit the mode. 1. While pressing the lAMSL knob and the x button at the same time, connect the AC power plug to the wall outlet, then remove your hands from the lAMSL knob and x button at the same time. When the MDS-JA555ES enters the test mode, the message "[Check]" appears and the STANDBY, PITCH CONTROL, and FILTER LEDs turn on. 2. Rotate the lAMSL knob until the message "Service" appears. Then press the YES button. 3. Rotate the lAMSL knob until the message "ERR DP MODE" appears. 4. Press the YES button to enter the error history mode and the message "total rec" appears. 5. Select the desired item to display or to execute using the lAMSL knob. 6. Press the lAMSL knob to display or execute the selected item. 7. Pressing the lAMSL knob again returns to the display of step 4. 8. To exit the error history mode, press the MENU/NO button. The message "ERR DP MODE" appears to exit the error history mode. 9. To exit the test mode, press the REPEAT button. The test mode display disappears and the PITCH CONTROL and FILTER LEDs are turned off. The MDS-JA555ES enters the standby state exiting the test mode. While pressing the ?/1 button, turn on the main power. The message "Initialize" flashes and the MDS-JA555ES is initialized.
4
[Displaying Contents of the Error History]
Display on screen total rec Contents of error history Displays the recording time. The display appears in "r h". This is the accumulated time when the laser is in the "high power" operation. This is about 1/4 of the actual recording time. The time is shown in the range of 0h to 65535h in hexadecimal number. Displays the playback time. The display appears in "p h". This is the accumulated time of actual playback in which pause time is not counted. The time is shown in the range of 0h to 65535h in hexadecimal number. Displays the accumulated count of record retry errors and playback retry errors. The display appears in "r p ". "r" indicates the record retry error count, and "p" indicates the playback retry error count. The retry count is shown in the range of 00 to FF in hexadecimal number. Displays the total error count. The message "total " appears. The count is shown in the range of 00 to FF in hexadecimal number. Displays the error contents from the latest error to the last ten errors. "0 E@@" appears. The history number is shown in . The smaller number means the newer history. (00 is the newest error.) The error code is indicated by @@. Refer to the following table for the contents of the error codes. The error histories can be switched by rotating the lAMSL knob. This mode is used to delete the histories of "retry err", "total err", and "err history". Before returning the repaired product to the customer, perform this operation to delete the past error history. To delete the history, press the lAMSL knob and press the YES button after "er refresh?" appears. "Complete!" appears for a moment and returns to the ERR DP MODE. When this mode is executed, be sure to check the following. · The data have been deleted. · Perform recording and playback. Check that the mechanism operates normally. This mode is used to delete the histories of "total rec" and "total play". These histories are used as reference when replacing the optical pick-up. When the optical pick-up is replaced, perform this operation to delete the histories. Press the lAMSL knob. After "tm refresh?" appears, press the YES button to delete the histories. "Complete!" appears for a moment and returns to the ERR DP MODE. When this mode is executed, be sure to check the following. · The data have been deleted. · Perform recording and playback and check that the mechanism operates normally.
total play
retry err
total err err history
er refresh
tm refresh
Error code table Error code E00 E01 E02 E03 E04 Error contents No errors Disc error Cannot read PTOC (Disc is ejected) Disc error UTOC error (Disc is not ejected) Loading error Cannot read the address (Out of servo) Error code E05 E06 E07 E08 E09 E0A Error contents Out of FOK Focus does not lock (Out of servo) Record retry Record retry error Playback retry error (Access error) Playback retry error (C2 error)
5
SECTION 1 SERVICING NOTE
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH IS TURNED OFF, AND LASER POWER CHECK 1 Remove the 16 screws (BVTT3 x 8) from the bottom plate. (Refer to Section 3 "Disassembly" Loading panel.) (page 14) 2 Remove the bottom plate. 3 Rotate the pully gear in the direction of the arrow A and open the tray in the direction of the arrow B. 4 When checking the laser power, remove beforehand the loading panel by removing the two screws (M2.6) and sliding aside the loading panel becouse the cable of the laser power meter can be pinched by the loading panel. (Refer to Section 3 "Disassembly" Loading panel.) (page 14)
Pulley gear
Remove the Loading panel
A
Two screws (M2.6)
B
Tray assembly
Forced Reset
Use this function when the MDS-JA555ES cannot be operated normally due to hung-up of the microprocessor. It is recommended to use this function when you cannot exit the test mode or the retry-cause-display mode, or when the normal operation cannot be performed after the MDS-JA555ES is disassembled once then re-assembled. Procedure : Remove the AC power plug from the wall outlet. Short-circuit pin-1 and pin-3 of CN703 on the BT board with a pair of tweezers or the like, to discharge the back-up battery. [BT board] (Conductor side)
JW790 JW791
1 BT701
3
CN703
6
[BD Board Waveform Check Tool]
Use of the exclusive tool (J-2501-149-A) is convenient to check the waveforms on the BD board. GND I+3V IOP TEO VC RF : Ground terminal : For measuring IOP (Checking deterioration of the optical pickup laser) : For measuring IOP (Checking deterioration of the optical pickup laser) : TRK error signal (traverse adjustment) : Reference level for when checking signals : RF signal (jitter check)
CN110
6pin connector
5pin connector
RF
VC TEO IOP I+3V GND
Schematic diagram of the connecting tools
1 RF VC TEO To MDM-3 IOP 5 I-3V 1 VC RF TEO To MDM-5 IOP To MDM-6 I+3V 6 GND
RF VC TEO IOP I+3V GND
7
[How to Record and Display the IOP Data When Replacing the Optical Pick-up and Non-volatile Memory (BD Board IC171)]
The IOP data that is indicated on the optical pick-up, can be saved in the non-volatile memory of the MDS-JA555ES. Saving the IOP data in the memory eliminates the needs to look at the printed value on the label that is attached on the surface of optical pick-up, and enables to view the IOP data on display. When the optical pick-up is replaced or when the non-volatile memory (IC171 on BD board) is replaced, save the IOP value that is printed on the label on the surface of optical pick-up by the following procedure.
How to Record the IOP Data: 1. While pressing the lAMSL knob and the x button at the same time, connect the AC power plug to the wall outlet, then remove your hands from the lAMSL knob and x button at the same time. When the MDS-JA555ES enters the test mode, the message "[Check]" appears. 2. Rotate the lAMSL knob until the message "Service" appears. Then press the YES button. 3. Rotate the lAMSL knob until the message "lop Write" (C28) appears. Then press the YES button. 4. "Ref=@@@.@" (@ is arbitrary number) appears and the values that can be changed as desired flash. 5. Input the IOP value that is printed on the optical pick-up. Selection of alphanumeric characters : Rotate the lAMSL knob. Selection of digit : Press the lAMSL knob. 6. Press the YES button. Then display changes to "Measu= @@@.@" (@ is arbitrary number). 7. The value that is shown step 6, is the result adjustment and should not be saved. So leave the value of step 6 as it is, and press the YES button. 8. The message "Complete!" appears for a moment, and the value is saved in the non-volatile memory. The message "Iop Write" appears. 9. Upon completion of data saving, press the REPEAT button.
How to Display the IOP Data: 1. While pressing the lAMSL knob and the x button at the same time, connect the AC power plug to the wall outlet, then remove your hands from the lAMSL knob and x button at the same time. When the MDS-JA555ES enters the test mode, the message "[Check]" appears. 2. Rotate the lAMSL knob until the message "Service" appears. Then press the YES button. 3. Rotate the lAMSL knob until the message "lop Write" (C28) appears. Then press the YES button. 4. The message "@@.@/##.#" appears. The contents that are saved in the non-volatile memory appear. @@.@ : The IOP value that is printed on optical pick-up ##.# : The IOP value after adjustment 5. To exit the data display, press the lAMSL knob or the MENU/NO button to show the message "Iop Read". Then press the REPEAT button.
8
[Checks before Part Replacement and Adjustment]
Cause of faulty can be approximately located by performing the following checks before starting the repair work. Refer to Section "5. Electrical Adjustment" the check procedure. Judgment criterion(NG when the measurement value is out of the specification value) · 0.9 mW power Specification value: 0.84 to 0.92 mW · 7.0 mW power Specification value: 6.8 to 7.2 mW · Iop (when 7 mW) The Iop value that is shown on the optical pick-up: +/- 10 mA · Traverse waveform Specification value: Offset 10% or less · Checking the error rate Specification value: All points of a, b, and c CI error 220 or less AD error 2 or less · Checking the error rate Specification value: a. When using the test disc (MDW-74/AU-1) CI error 80 or less AD error 2 or less b. When using the check disc (TDYS-1) CI error 50 or less · Checking the error rate in C PLAY Specification value: CI error 80 or less AD error 2 or less Remedial measure in case of NG · Cleaning the optical pick-up · Readjustment · Replacing the optical pick-up · Replacing the optical pick-up
Laser power check (Refer to section 5-6-2, page 27.)
Traverse check (Refer to section 5-6-3, page 28.) Focus bias check (Refer to section 5-6-4, page 29.)
· Replacing the optical pick-up · Replacing the optical pick-up
C PLAY check (Refer to section 5-6-5, page 29.)
· Replacing the optical pick-up
Self-recording/playback check (REC/PLAY) (Refer to section 5-6-6, page 29.)
Temperature compensation · NG when "T=@@(##)(NG" appears offset check (@@ and ## are arbitrary numbers.) (Refer to section 5-6-1, page 27.)
In case of NG all the time: · Replacing the overwrite head · Check disconnection of the circuits around the overwrite head In case of intermittent NG: · Check deformation of overwrite head · Check mechanism around the sled · Check disconnection of the circuits around the D101 (BD board) · Check signals around the IC101, IC121, CN102 and CN103 (BD board)
Note: The judgment criterion is shown for the purpose of judging if the performance is acceptable or not. This is not the specification value for adjustment. Use the specification value for adjustment when the MDS-JA555ES is going to be adjusted.
9
[Retry Cause Display Mode]
· In this test mode, the retry causes of the MDS-JA555ES during record and stop modes can be displayed on the fluorescent display tube. This mode becomes the "track mode" during playback in which the track information is available. This mode is useful for locating the defective area of the MDS-JA555ES. The contents to be displayed are as follows. During record and stop modes: Retry cause, number of retries, and number of retry errors During playback mode: Information such as disc types under playing back, position of playback and copyright. Each information is displayed in hexadecimal number.
·
Procedure: 1. Load a recordable disc whose contents can be erased, into the MDS-JA555ES. 2. Press the MENU/NO button. After the message "Edit Menu" appears on the fluorescent display tube, rotate the lAMSL knob until the message "All Erase ?" appears. 3. Press the YES button. (Alternately the lAMSL knob can also be pressed.) 4. The message "All Erase ??" appears on the fluorescent display tube. Then the numerals on the music calendar flash. 5. Press the YES button, then the message "Complete !!" appears. Press the x button immediately, and wait for about 15 seconds while keeping pressing the button. (Alternately the lAMSL knob can be pressed instead of YES button.) 6. When the characters "TOC" have disappeared from the fluorescent display tube, remove your hands from the x button. 7. Press the zREC button to enter the record standby mode. Then press the X button to start recording. 8. When you want to enter the "Track mode", press the N button to start playback. 9. To exit the test mode, press the ?/1 button. The message "TOC" flashes, the MDS-JA555ES enters the standby mode and exits the test mode.
Fig. 1 Reading the Test Mode Display (During record and stop modes) RTs@@c##e** Display on the fluorescent display tube @@ : Cause of retry ## : Number of retries ** : Number of retry errors Fig. 2 Reading the Test Mode Display (During playback) @@ ####** $$ Display on the fluorescent display tube @@ ## ** $$ : Parts No. (Area name that is given on the TOC) : Cluster address (physical address on the disc) : Sector : Track mode (track information such as copyright information of each part, etc.)
How to read the retry cause display: Higher Bits Hexadecimal 8 4 2 1 Bit b7 b6 b5 b4 Binary number 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 Lower Bits 8 4 2 1 Hexadecimal b3 b2 b1 b0 0 0 0 1 01 02 0 0 1 0 0 1 0 0 04 1 0 0 0 08 10 0 0 0 0 0 0 0 0 20 40 0 0 0 0 0 0 0 0 80 Name of retry cause When 1
shock When track jump (shock) is detected ader5 When ADER is counted five times or more continuously Address is not continuous When ADIP address is not continuos DIN unlock Detects DIN unlock is detected FCS unlock When focus is unlocked IVR rec error When signal level of the ABCD signal exceeds the specified range CLV unlock When CLV is unlocked Access fault When access operation is not performed normally
10
Reading the Display: Convert the hexadecimal display of each digit into binary display. If more than two causes, they will be added. Example When 42 is displayed: Higher bit: 4 = 0100 b6 Lower bit: 2 = 0010 b2 In this case, the retry cause is combined of "CLV unlock" and "ader5". Example When A2 is displayed: Higher bit: A = 1010 b7+b5 Lower bit: 2 = 0010 b1 In this case, the retry cause is combined of "ACCESS default", "IVRrec" and "ader5". The reading of the track mode display is as follows.
Higher Bits Hexadecimal 8 4 2 1 Bit b7 b6 b5 b4 Binary 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0
Lower Bits 8 4 2 1 Hexadecimal b3 b2 b1 b0 01 0 0 0 1 0 0 1 0 02 0 1 0 0 04 08 1 0 0 0 0 0 0 0 10 20 0 0 0 0 0 0 0 0 40 80 0 0 0 0
Contents When 0 Emphasis OFF Monaural 2-bit display, normally 01 01: Normal audio, Other: Invalid Audio (normal) Original Copyright exists Writing is prohibited When 1 Emphasis OFF Stereo
Invalid Digital copy No copyright Writing is allowed
Reading the Display: Convert the hexadecimal display of each digit into binary display. The several causes are added and displayed. Example When 84 is displayed: Higher bit: 8 = 1000 b7 Lower bit: 4 = 0100 b2 This example shows that "Emphasis: OFF", "Monaural", "Original", "Copyright exists" and "Writing is allowed" because b2 and b7 are 1 while all other bits are 0. Example When 07 is displayed: Higher bit: 0 = 0000 all 0 Lower bit: 7 = 0111 b0+b1+b2 This example shows that "Emphasis: ON", "Stereo", "Original", "Copyright exists" and "Writing is prohibited" because b0, b1 and b2 are 1 while all other bits are 0. Hexadecimal Binary Conversion Table Hexadecimal 0 1 2 3 4 5 6 7 Binary 0000 0001 0010 0011 0100 0101 0110 0111 Hexadecimal 8 9 A B C D E F Binary 1000 1001 1010 1011 1100 1101 1110 1111
11
SECTION 2 GENERAL
Front Panel
1 2 3 4 5 67 8 9 0 qa qs qd qf
wl wk
wj
wh
wg wf wd ws
wa
w;
ql
qk
qj qh qg
1 2 3 4 5 6 7 8 9 0 qa qs qd qf qg
SATNDBY indicator 1/u (POWER) button Remote sensor PITCH CONTROL button SCROLL button DISPLAY/CHAR button REPEAT button Display window MENU/NO button l AMS L knob YES button DIGITAL REC LEVEL knob ANALOG REC LEVEL knob 0 ) button z REC button and indicator
qh qj qk ql w; wa ws wd wf wg wh wj wk wl
x (STOP) button X (PAUSE) button and indicator N (PLAY) button and indicator A OPEN/CLOSE button CLEAR button Disc Tray TIME button PLAY MODE button FADER button FILTER button INPUT button PHONE LEVEL knob PHONE jack TIMER knob
Rear Panel
1 2
3
4
5
6
1 LINE (ANALOG) IN jack 2 LINE (ANALOG) OUT jack 3 DIGITAL IN (COAXIAL/OPT1/OPT2) jack
4 DIGITAL OUT (COAXIAL/OPT1/OPT2) jack 5 CONTROL A1 II jack 6 Power Supply cord
12
This section is extracted from instruction manual.
13
SECTION 3 DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. CASE
1 Two screws (CASE 3 TP2) 3 Remove the upper case in the direction of the arrow A. 1 Screw (CASE 3 TP2)
A
1 Two screws (CASE 3 TP2) 2 Open the top cover
3-2. LOADING PANEL
5 Loading panel
3 Rotate the pulley gear in the direction of the arrow A, and open the tray in the direction of the arrow B.
A
4 Two screws (M2.6)
Tray assembly
B
2 Bottom plate
1 Eight screws (3 × 8)
1 Six screws (3 × 8)
14
3-3. FRONT PANEL ASSEMBLY
6 Three screws (BV 3 × 8 CU) 7 Bracket (F) 3 Connector (CN651) 2 Connector (CN303)
1 Flat type wire (CN800)
4 Two knobs (VOL)
8 Front panel assembly 5 Five screws (3 × 8)
3-4. MD MECHANISM DECK
1 Six screws (3 × 8) 2 Remove the cover (MDM-T) and the fixing plate (MDM-T) together.
4 Two screws (BVTT3 × 6) 5 Two lug terminals 6 Four screws (BVTT 3 × 6) 7 Two flat type wires (CN102, 103)
(CN102)
8 Remove the MD mechanism deck in the direction of the arrow A.
(CN103)
3 Connector (CN202) A
15
3-5. TRAY ASSEMBLY
2 Two screws (BV2.6) 4 Bracket (top) 2 Two screws (BV2.6) 6 Screw (BV2.6) 7 Stopper (shaft B) 5 Three gears (top) 3 Lug
8 Shaft
5 Three gears (top)
B 9 Remove the tray asssembly in the direction of the arrow B.
A
1 Rotate the pully gear in the direction of the arrow A and pull the tray assembly.
NOTE FOR INSTALLATION
Slider assembly
Slider assembly Pin When the tray assembly is attached, move the slider assembly in the direction of the arrow B so that the pin is located in the position as shown above. Then attach the tray assembly.
B
A
When the gears (top) (two gears on the front) are attached, pull the tray assembly out in the direction of the arrow A and align the rack (L) and slider (D) assembly as shown.
Mark
Slider (D) assembly
Tray assembly
Rack (L) Gear (top) Slider (D) assembly
16
3-6. BU HOLDER ASSEMBLY
2 Two scews (BV2.6) 3 Two collars (damper)
2 Two scews (BV2.6) 3 Two collars (damper)
4 Two compression springs
4 Two compression springs
5 BU holder assembly
Fig. A
Slider
1 Turn the pully gear to align the slider with of the rib. (Refer to Fig. A.)
Rib
3-7. MOTOR (LOADING) ASSEMBLY (M10)
2 Two screws (BV2.6)
3 Gear assembly
6 Motor (loading) assembly (M10) 5 Two screws (B2 × 3) 4 Belt (loading)
1 Connector (CN14)
17
3-8. BASE UNIT (MBU-5C)
1 Leaf spring (UDL)
2 Leaf spring (UDR) 3 Remove the holder assembly in the direction of the arrow A.
A
5 Base unit
4 Two screws (BV2.6)
4 Two screws (BV2.6)
3-9. BD BOARD
5 Two precision screws (+P1.7 × 2.5)
6 Claw
3 Flexible board (CN104)
4 Tapping screw (M1.7) 7 BD board
2 Remove the soldering from the push switch.
1 Remove the soldering of the lead wires from the spindle motor assembly. 3 Flexible board (CN101)
18
3-10. OVER LIGHT HEAD (HR901)
3 Over light head (HR901)
2 Screw (P1.7 × 6)
1 Flexible board (CN104)
3-11. MINI DISC DEVICE (KMS-260B/J1N)
2 Screw +B (B2 × 8)
3 Leaf spring (shaft)
4 Main shaft 5 Remove the mini disc device (KMS-260B/J1N) in the direction of the arrow A.
1 Flexible board (CN104) A
1 Flexible board (CN101)
19
SECTION 4 TEST MODE
4-1. Precaution on Using the Test Mode
· Be sure to insert and eject a disc after confirming that the disc in the MDS-JA555ES has come to complete stop because the loading related movements of the mechanism are performed without any relationship with the test mode. Disc does not stop rotating even through the A button is pressed while disc is rotating in the modes such as continuous playback and continuous recording. Therefore, the disc is ejected while it is rotating. Be sure to press the MENU/NO button, then press the A button after a disc has completely stopped of its rotation.
4-1-1. Modes in Which Recording Laser Emits the Light and the Button Operations · Continuos recording mode (CREC MODE) · Laser power check mode (LDPWR CHECK) · Laser power adjustment mode (LDPWR ADJUST) · Traverse (MO) check (EF MO CHECK) · Traverse (MO) check (EF MO ADJUST) · When the zREC button is pressed
4-2. How to Enter the Test Mode
There are two methods to enter the test mode as follows. Method 1: Connect the power plug to the outlet while pressing the lAMSL knob and x button at the same time, and remove the lAMSL knob and x button at the same time. When the unit enters the test mode, "[Check]" appears. The four groups can be switched, ...... Check Adjust Service Develop ..... , by rotating the lAMSL knob. Method 2: Connect the power plug to the outlet while pressing the lAMSL knob, and remove the lAMSL knob. When the unit enters the test mode, "TEMP CHECK" appears. When the test mode is entered using this method, the contents of check group at method 1 can be performed.
4-3. Exiting the Test Mode
Press the REPEAT button. The display and LEDs of the pitch control and the filter are turned off. The MDS-JA555ES enters the standby status and exits the test mode.
4-4. Basic Operation of the Test Mode
All operations are performed using the lAMSL knob, YES button, and MENU/NO button. The functions of these button are as follows. Function lAMSL knob YES button MENU/NO button Contents Changes parameters and modes Proceeds onto the next step. Finalize input. Returns to previous step. Stops operations.
20
4-5. Selecting the Test Mode
There are 31 types of the test mode. The group can be switched by rotating the lAMSL knob. Select the group to be used and press the YES button. After each group is entered, each mode can be switched by rotating the lAMSL . For the selected contents, refer to the "Group" column in the list. The group S can support all test modes for servicing. Be careful not to select other groups if not necessary. Display TEMP CHECK LDPWR CHECK EF MO CHECK EF CD CHECK FBIAS CHECK ScurveCHECK VERIFYMODE DETRK CHECK TEMP ADJUS LDPWR ADJUS EF MO ADJUS EF CD ADJUS FBIAS ADJUS EEP MODE ERR DP MODE ADJ CLEAR AG Set (MO) AG Set (CD) Iop Read Iop Write JA555 @@@@@@ CPLAY MODE CREC MODE No. C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C17 C24 C25 C26 C27 C28 C29 C30 C31 Contents Temperature compensation offset check Laser power check Traverse (MO) check Traverse (CD) check Focus bias check S curve 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 Error history display, clear 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 writing Version display of microprocessor Continuous playback mode Continuos recording mode Mark C C C C C C C C Group (*) S S S S S
(×) (×) (×)
A A A A A (×) (!)
S S S S S D S
A
S A A A
C C C C
A A
S S S S S S S
D D
· · ·
For detailed description of each adjustment mode, refer to Section 5 "Electrical Adjustments". For "ERR DP MODE" (C17), refer to the self-diagnosis function of page 2. If a different adjustment mode has been selected by mistake, press the MENU/NO button to exit from it. The items marked (×) in the mark are not used in servicing, therefore they are not detailed. . If select these modes accidentally, press the MENU/NO button immediately to exit from it. If the items marked (!) are selected especially, the unit could be operated wrongly by rewriting the contents of non-volatile memory. Be careful of it.
(*) Group C : Check A : Adjust S : Service D : Develop
21
4-5-1. Operating the Continuos Playback Mode 1. Entering the continues playback mode 1) Load the disc into the unit. (recordable disc or disc for playback) The disc is loaded by pushing the tray. 2) Rotate the lAMSL knob to display "CPLAY MODE" (C30). 3) Press the YES button to change the display to "CPLAY MID". 4) When access completes, the display changes the display to "C = AD = ". Note : The value of the " " displayed on the screen indicates error rate and "ADER". 2. Changing the parts to be played back 1) Press the YES button during continuos playback to change the display as shown and move the played back part.
"CPLAY MID" "CPLAY OUT" "CPLAY IN"
2) When access completes, the display changes to "C = AD = ". Note : The value of the " " displayed on the screen indicates error rate and "ADER". 3. Ending the continuos playback mode 1) Press the MENU/NO button to change the display to "CPLAY MODE". 2) Press the A button to eject the disc. Note1 : The playback start addresses for IN, MID, and OUT are as follows. IN : 40h cluster MID : 300h cluster OUT : 700h cluster Note 2 : When the N button is pressed during the continuos playback in order to switch the tracking servo ON and OFF, the message "SERVO ON" appears without displaying "CPLAY MODE" when the MENU/NO button is pressed to end the continuos playback mode. Also when the servo is turned off, the servo is turned on automatically, the message "SERVO ON" appears and then the mode ends afterward. To change the display "SERVO ON" to the normal "mode" display, press the x button.
22
4-5-2. Operating the Continuos Recording Mode (Use this mode for self record/playback check only) 1. Entering the continuos recording mode 1) Load the recordable disc to the unit. The disc is loaded by pushing the tray. 2) Rotate the lAMSL knob to display "CREC MODE" (C31). 3) Press the YES button to change the display to "CREC MID". 4) When access completes, the display changes the display to "CREC( " and REC illuminates. Note : The value of the " " displayed on the screen indicates the address of the recorded position. 2. Changing the parts to be recorded 1) Press the YES button during continuos playback to change the display as shown and move the played back part. during moving. "CREC MID" "CREC OUT" "CREC IN"
REC disappears
2) When access completes, the display changes to "CREC( " and REC disappears. Note : The value of the " " displayed on the screen indicates the address of the recorded position. 3. Ending the continuos recording mode 1) Press the MENU/NO button. The display changes to "CREC MODE" and REC disappears. 2) To eject the disc, press the A button. Note 1: The playback start addresses for IN, MID, and OUT are as follows. N : 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 continuos recording for long periods of time above 5 minutes. Note 4: During continuos recording, be careful not to apply vibration. 4-5-3. No-Volatile Memory Mode (EEP MODE) This mode reads and writes the contents of the non-volatile memory. It is not used in servicing. If selecting this mode accidentally, press the MENU/NO button immediately to exit it.
4-6. Functions of Other Buttons
Function name N x M m SCROLL PLAY MODE DISPLAY/CHAR A/OPEN/CLOSE REPEAT Main contents Sets continuos playback when pressed in the STOP state. When pressed during continuos playback, the tracking servo turns ON/OFF. *Note Stops continuos playback and continuous recording The sled moves to the outer circumference only when this is pressed The sled moves to the inner circumstance 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 display when pressed Removes the disc Exits test mode
Note : If the continuos playback mode ends with the tracking servo OFF, the tracking servo is automatically turned on. When the message "SERVO ON" appears at the end, press the x button to returns to the normal "mode" display.
23
4-7. Test Mode Displays
Each time the DISPLAY/CHAR button is pressed, the display changes in the following order. 1. MODE display Displays "TEMP CHECK", "CPLAY MODE", etc. 2. Error rate display Error rates are displayed as follows. C= AD = C = Indicates CI error AD = Indicates ADER 3. Address display Addresses are displayed as follows. (MO: recordable disc, CD: disc for playback only) Every pressing of the SCROLL button toggles between the groove display and the pit display h= s= (MO pit and CD) h= a= (MO groove) h = : Indicates header address s = : Indicates SUBQ address a = : Indicates ADIP address Note: The display "-" appears when the servo is not locked. 4. Auto gain display (not used in servicing) The auto gain display is shown as follows. AG= / [ 5. Detrack check display (not used in servicing) The detrack check display is shown as follows. ADR= 6. IVR display (not used in servicing) The IVR display is shown as follows. [ ][ ][
MODE display Error rate display Address display Auto gain display (not used in servicing) Detrack check display (not used in servicing) IVR display (not used in servicing)
Meaning of Other Displays Display H X REC -SYNC A. SPACE OVER B ATRACK DISC SLEEP CLOCK MODE display During continuos playback (CLV: ON) Tracking servo OFF Recording mode OFF 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 Contents Off STOP (CLV:OFF) Tracking servo ON Recording mode OFF CLV normal mode Tracking offset cancel OFF
Groove Low reflection CLV-A CLV UNLOCK
24
SECTION 5 ELECTRICAL ADJUSTMENTS
5-1. On Part Replacement and Adjustment
· Perform the checks and adjustments of the MDM and MBU blocks following the procedure below . The procedure is changed depending on the replaced part.
· Temperature compensation offset check · Laser power check · Traverse check · Focus bias check · C PLAY check · Self record/playback check OK NG Part Replacement and repairing
· Abbreviation OP : Optical pick-up OWH : Overwrite head
The error occurs by other cause. Perform the mechanism check of the sled and spindle system, etc.
OWH is replaced ?
YES
NO
Either OP, IC171, IC101, or IC121 is replaced ?
YES Initial setting of adjustment value NO
OP or IC171 is replaced ? YES Recording the IOP information (IOP value that is recorded in OP)
NO
Either IC171 or D101 is replaced ?
YES Temperature compensation offset adjustment
NO
· Traverse adjustment · Focus bias adjustment · Error rate adjustment · Auto gain adjustment
25
5-2. 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.
5-3. Precautions for Use of Optical Pick-up (KMS-260B)
As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap on the flexible board of the optical pick-up when using it. Before disconnecting the connector, disorder the laser tap. Be careful not to remove the solder before connecting the connector. Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.
Pick-up Flexible board
2) Set the test mode when performing the adjustments. After completing the adjustments, exit the test mode. Perform the adjustments and checks in "Group S" of the test mode. 3) Perform the necessary adjustments only in the order given. 4) Use the following tools and measuring devices. · Check disc (MD) TDYS-1 (Parts No.: 4-963-646-01) · Test disc (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) (Note) · Oscilloscope (Measure after perform the CAL of the probe.) · Digital voltmeter · Thermometer · Tool for checking waveform of BD board (Parts No.: J-2501149-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 When checking the waveform, the check can be performed without soldering by using the tool for checking waveform of BD board. (Refer to the Service note (page 6).) 7) Use the tool disc that is free from finger print and dust as they can affect result of adjustment. Note: Laser power meter When the laser power check and adjustment of the electrical adjustment are performed, using the new MD laser power meter 8010S (J-2501-145-A) instead of the former laser power meter is recommended. The procedure of installing the laser meter sensor to the objective lens of pickup is greatly simplified.
Laser tap Optical pick-up flexible board
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. BD board Optical IC101, pick-up IC171 D101 IC192 IC121 1. Initial setting of adjustment value 2. Recording IOP information (the value that is written in pick-up) 3. Temperature compensation offset adjustment 4. Laser power adjustment 5. Traverse adjustment 6. Focus bias adjustment 7. Error rate adjustment 8. Auto gain output level adjustment a a × a ×
a
a
×
×
×
× a a a a a
a
a × × × × ×
× a a a a a
× a × × × ×
a a a a a
26
5-5. Creating Continuos Recorded Disc
· This disc is used in focus bias adjustment and error rate check. The following describes how to create a continuos recording disc. 1. Load a disc (blank disc) commercially available. the disc is loaded by pushing the tray. 2. Rotate the lAMSL knob and display "CREC MODE" (C31). 3. Press the YES button to display "CMEC MID". "CREC (0300)" is displayed for a moment and recording starts. 4. Complete recording within 5 minutes. 5. Press the MENU/NO button to stop recording. 6. Press the A button to eject the disc. The above has been how to create a continuos recording data for the focus bias adjustment and error rate check. Note: · Be careful not to apply vibration during continuos recording.
5-6-2. Laser Power Check Before check: · Refer to Section 1 "Service note" How to open the disc tray when power switch is turned off, and laser power check. · Check the IOP value of optical pick-up. (Refer to Section 5-8 "Recording and displaying IOP information".) Connection:
Laser power meter
Optical pick-up objective lens
Digital voltmeter BD board
5-6. Check before Repairing
This check aims at locating the approximate position of cause of trouble before starting to replace parts using specifications. For detailed information, refer to [Checks before Part Replacement and Adjustment] of Service note (page 9). 5-6-1. Temperature Compensation Offset Check Before adjustment, set the internal temperature and the ambient temperature are between 22 and 28 °C. Checking procedure: 1. Rotate the lAMSL knob to display "TEMP CHECK" (C01). 2. Press the YES button. 3. It is OK when "T=@@(##)[OK" appears. It is NG when "T=@@(##)[NG" appears. (@@ is the current value. ## is the value that is written in the non-volatile memory.)
CN110 5-pin (I+3V) CN110 4-pin (IOP)
Checking procedure: 1. Insert the laser power meter from the disc inlet and set it on the objective lens of the optical pick-up. (When it cannot be set properly, press the m button and M button to move the optical pick-up.) Connect the digital voltmeter to CN110 5-pin (I+3V) and the CN110 4-pin (IOP). 2. Rotate the lAMSL knob to display "LDPWR CHECK" (C02). 3. Press the YES button once to display "LD 0.9mW $ ". Confirm that the reading of the laser power meter is 0.84 to 0.92 mW. 4. Press the YES button once again to display "LD 7.0mW $ ". Confirm that the readings of the laser power meter and digital bolt meter satisfy the specified value. Specification: Laser power meter reading: 7.0 +/- 0.2 mW Digital bolt meter reading: Optical pick-up displayed value +/- 10 %
(Optical pick-up label) (For the checking procedure of this value, refer to Section 5-8 "Recording and displaying IOP information".)
KMS
260B 24391 H0528
IOP = 52.8 mA in this case IOP (mA) = digital bolt meter reading (mV)/1 (W)
5. Press the MENU/NO button to display "LDPWR CHECK" and stop laser emission. (The MENU/NO button is effective at all times to stop the laser emission.) Note 1 : After step 4, the display of "LD 0.7mW$ " "LD 6.2mW$ ", "LD WPcorrection $ " is switched every time when pressing the YES button. Operation is not necessary for these displays.
27
5-6-3. Traverse Check Note 1 : If the recorded disc is used for this adjustment, the data is deleted. Note 2 : If the traverse waveform is not clear, connect the oscilloscope as shown below so that it can be seen more clearly.
Oscilloscope (DC range)
8. Observe the waveform of the oscilloscope and confirm it that is within the specified value. Do not rotate the lAMSL knob at this time. (Write power traverse check)
(Traverse Waveform) A
VC
BD board
330k
B Specification: Offset value 10% or less Offset value % = AB 2(A+B) × 100
CN110 3-pin (TEO) CN110 1-pin (VC)
10pF
Connection:
Oscilloscope (DC range) BD board CN110 3-pin (TEO) CN110 1-pin (VC)
V : 0.5V/div H : 10ms/div
9. Press the YES button to display "EFB = MO-P". The optical pick-up moves to the internal circumference of the pit area automatically and servo is imposed. 10. Observe the waveform of the oscilloscope and confirm that it is within the specified value. Do not rotate the lAMSL knob at this time.
(Traverse Waveform)
Checking procedure: 1. Connect the oscilloscope to the CN110 3-pin (TEO) and the CN110 1-pin (VC) of the BD board. 2. Load a recordable disc (any available on the market). (Refer to Note 1.) The disc is loaded by pushing the tray. 3. Press the M button to move the optical pick-up outside the pit. 4. Rotate the lAMSL knob to display "EF MO CHECK" (C03). 5. Press the YES button to display "EFB = MO-R". (Laser power READ power, focus servo ON, tracking servo OFF, and spindle (S) servo ON are set) 6. Observe the waveform of the oscilloscope and confirm it is within the specified value. Do not rotate the lAMSL knob at that time. (Read power traverse check)
(Traverse Waveform) A
A
VC
B Specification: Offset value 10% or less Offset value % = AB 2(A+B) × 100
11. Press the YES button to display "EF MO CHECK". The disc stops rotating automatically. 12. Press the A button to eject the disc. 13. Load the check disc (MD) TDYS-1. 14. Rotate the lAMSL knob to display "EF CD CHECK" (04). 15. Press the YES button to display "EFB = CD". The servo is imposed automatically. 16. Observe the waveform of the oscilloscope and confirm that it is within the specified value. Do not rotate the lAMSL knob at this time.
(Traverse Waveform)
VC
B
A
Specification: Offset value 10% or less Offset value % = AB 2(A+B) × 100
VC
B Specification: Offset value 10% or less
7. Press the YES button to display "EFB =
MO-W".
Offset value % =
AB 2(A+B)
× 100
17. Press the YES button to display "EF CD CHECK". 18. Press the A button to eject the check disc (MD) TDYS-1.
28
5-6-4. Focus Bias Check Change the focus bias to check the focus tolerance amount. Checking procedure: 1. Load the test disc (MDW-74/AU-1). The disc is loaded by pushing the tray. 2. Rotate the lAMSL knob to display "CPLAY MODE" (C30). 3. Press the YES button to display "CPLAY MID". 4. After "C = AD = " appears, press the MENU/NO button. 5. Rotate the lAMSL 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 two digits after "c = " indicate the focus bias amount. Confirm that the C1 error is below 220 and the ADER is below 2. 7. Press the YES button to change the display to " / b = ". Confirm that the C1 error is below 220 and the ADER is below 2. 8. Press the YES button to change the display to " / a = ". Confirm that the C1 error is below 220 and the ADER is below 2. 9. Press the MENU/NO button and press the A button to eject the test disc. 5-6-5. C PLAY Check MO rate check Checking procedure: 1. Load a test disc (MDW-74/AU-1). The disc is loaded by pushing the tray. 2. Rotate the lAMSL knob to display "CPLAY MODE" (C30). 3. Press the YES button to display "CPLAY MID". 4. The display is changed to "C = AD = ". 5. Confirm that the C1 error rate is below 80 and the ADER is below 2. 6. Press the MENU/NO button to stop playing back. Press the A button to eject the test disc. MO rate check Checking procedure: 1. Load a check disc (TDYS-1). The disc is loaded by pushing the tray. 2. Rotate the lAMSL knob to display "CPLAY MODE" (C30). 3. Press the YES button to display "CPLAY MID". 4. The display is changed to "C = AD = ". 5. Confirm that the C1 error rate is below 50. 6. Press the MENU/NO button to stop playing back. Press the A button to eject the check disc.
5-6-6. Self Record/Playback Check · The error rate is checked using the self record/playback disc. Manufacture the self record/playback disc by user locally using the MDS-JA555ES that is going to be measured of its error rate by means of continuous recording. Checking procedure: 1. Load a recordable disc (blank disc) into the unit. The disc is loaded by pushing the tray. 2. Rotate the lAMSL knob to display "CREC MODE" (C31). 3. Press the YES button to display "CPLAY MID". 4. When recording starts, the message REC appears and the message changed to "CREC (@@@@" (@@@@ is an address) and recording starts. 5. After one minute, press the MENU/NO button to stop continuos recording. 6. Rotate the lAMSL knob to display "CREC MODE" (C30). 7. Press the YES button to display "CPLAY MID". 8. Display "C = AD = ". 9. Confirm that the C1 error rate is below 80 and the AD error rate is below 2. 10. Press the MENU/NO button to stop playing back. Press the A button to eject the check disc.
5-7. Returning to Initial Setup of Adjustment Value
Note: The adjustment result that is stored in the non-volatile memory is all cleared and returned to the initial setup value when procedure is performed. However, the adjustment result of the temperature compensation offset adjustment remains unchanged. When this procedure is performed, be sure to perform all adjustments from very beginning to the end again except the temperature compensation offset adjustment. Perform this procedure as necessary before starting adjustment referring to section "5-4. Precautions for Adjustments". Setting procedure: 1. Rotate the lAMSL knob to display "ADJ CLEAR" (C24). 2. After pressing the YES button, "Complete!" appears for a moment and the initial setting is started. Then, "ADJ CLEAR" appears.
29
5-8. Recording and Displaying the IOP Information
The IOP data that is indicated on the pickup, can be saved in the non-volatile memory of the MDS-JA555ES. The IOP data that is printed on the optical pickup and the IOP data after adjustment is completed can be saved in the memory. Saving the IOP data in the memory eliminates the needs to look at the printed value on the label that is attached on the surface of optical pick, and enables to view the IOP data on display. Recording procedure: 1. Rotate the lAMSL knob to display "Iop Write" (C28). Press the YES button. 2. "Ref=@@@.@" (@ is arbitrary number.) appears and the values that can be changed flash. 5. Input the value of IOP that is written in the optical pick-up. Selecting figure: Rotate the lAMSL knob. Selecting digit : Press the lAMSL knob. 6. Press the YES button and "Measu=@@@.@" (@ is arbitrary number.) appears. 7. The value of step 4 is used to record the adjustment result, so press the YES button. 8. "Complete!" appears for a moment, and the value is recorded in the non-volatile memory. Then, "Iop Write" appears. Displaying procedure: 1. Rotate the lAMSL knob to display "lop Write" (C27) and press the YES button. 4. "@@.@/##.#" appears and the contents that is recorded are displayed. @@.@: The value of IOP that is described in pick-up ##.#: The value of IOP after adjustment 5. When the display is completed, press the lAMSL knob or MENU/NO button to display "Iop Read".
5-9. Temperature Compensation Offset Adjustment
The temperature data at 25°C is used as the reference data and is saved in the non-volatile memory for offset adjustment. Note. 1. Do not perform this adjustment normally. 2. Perform this adjustment under the ambient temperature in the range of 22 to 28 °C. Perform this adjustment immediately after the main power is turned on in which the internal temperature of MDS-JA555ES is still the same as the ambient temperature. 3. After replacing the D101, wait the until the temperature of the parts become the same as the ambient temperature and perform this adjustment. Checking procedure: 1. Rotate the lAMSL knob to display "TEMP CHECK" (C09). 2. Press the YES button and select the "TEMP ADJUS" mode. 3. "TEMP= [OK" and the current temperature data appear. 4. When the data is saved: Press the YES button When the data is not saved: Press the MENU/NO button 5. When the YES button is pressed, "TEMP = SAVE" and "TEMP ADJUST" appear. When the MENU/NO button is pressed, the display is changed to "TEMP ADJUD" immediately. Specified value: The value of TEMP = to 1F, and 20 to 2F.
is within E0 to EF, F0 to FF, 00 to 0F, 10
5-10. Laser Power Adjustment
Before adjustment: Confirm the IOP value of optical pick-up. (Refer to Section 5-8 "Recording and displaying the IOP information".) Connection:
Laser power meter
Optical pick-up objective lens
Digital voltmeter BD board CN110 5-pin (I+3V) CN110 4-pin (IOP)
Adjustment procedure: 1. Insert the laser power meter from the disc inlet and set it on the objective lens of the optical pick-up. (When it cannot be set properly, press the m button and M button to move the optical pickup.) Connect the digital voltmeter to CN110 5-pin (I+3V) and the CN110 4-pin (IOP).
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2. Rotate the lAMSL knob to display "LDPWR CHECK" (C10). (laser power: for adjustment) 3. Press the YES button once to display "LD 0.9mW $ ". 4. Set the lens knob of the laser power meter to 10 mW, press the YES button, and save the adjustment results in the non-volatile memory. ("LD SAVE $ " appears for a moment at this time.) 5. "LD 7.0mW $ " is displayed. 6. Rotate the lAMSL knob so that the reading of the laser power meter is 6.9 to 7.1 mW. Press the YES button and save it. ("LD SAVE $ " appears for a moment at this time.) Note: Do not perform the emission of 7.0 mW continuously for 15 seconds and more. 7. Rotate the lAMSL knob to display "LDPWR CHECK" (C02). 8. Press the YES button once to display "LD 0.9mW $ ". The reading of laser power meter is 0.85 to 0.91 mW. 9. Press the YES button once to display "LD 7.0mW $ ". The reading of laser power meter is within the specified value. Take note of the digital bolt mater reading.
(Optical pick-up label) (For the checking procedure of this value, refer to Section 5-8 "Recording and displaying IOP information".)
5-11. Traverse Adjustment
Note1: If the recorded disc is used for this adjustment, the data is deleted. Note2: If the traverse waveform is not clear, connect the oscilloscope as shown below so that it can be seen more clearly.
Oscilloscope (DC range) BD board
330k
CN110 3-pin (TEO) CN110 1-pin (VC)
10pF
Oscilloscope (DC range) BD board CN110 3-pin (TEO) CN110 1-pin (VC)
V : 0.5V/div H : 10ms/div
KMS
260B 24391 H0528
IOP = 52.8 mA in this case IOP (mA) = digital bolt meter reading (mV)/1 (W)
10. Press the MENU/NO button to display "LDPWR CHECK" and stop laser emission. (The MENU/NO button is effective at all times to stop the laser emission.) 11. Rotate the lAMSL knob to display "lop Write" (C28). 12. Press the YES button and after "Ref=@@@.@" (@ is arbitrary number.) appears press the YES button to display "Measu=@@@.@". (@ is arbitrary number.) 13. The changeable value flashes. Input the IOP value that is written at step 9. Selecting figure: Rotate the lAMSL knob. Selecting digit : Press the lAMSL knob. 14. After pressing the YES button, "Complete!" appears for a moment, and the value is recorded in the non-volatile memory. Then, "Iop Write" appears. Note 1: After step 9, the display of "LD 0.7mW$ " "LD 6.2mW$ ", "LC WPcorrection $ " is switched every time when pressing the YES button. Operation is not necessary for these displays.
Adjustment procedure: 1. Connect the oscilloscope to the CN110 3-pin (TEO) and the CN110 1-pin (VC) of the BD board. 2. Load a recordable disc (any available on the market). (Refer to Note 1.) The disc is loaded by pushing the tray. 3. Press the M button to move the optical pick-up outside the pit. 4. Rotate the lAMSL knob to display "EF MO ADJUS" (C11). 5. Press the YES button to display "EFB = MO-R". (Laser power READ power, focus servo ON, tracking servo OFF, and spindle (S) servo ON are set) 6. Rotate the lAMSL knob so that the waveform of the oscilloscope is the specified value. (The figure of the " EFB = " and the waveform are changed by rotating the lAMSL knob.) In this adjustment. the waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Read power traverse adjustment)
(Traverse waveform) A
VC
B Specification: A = B
7. Press the YES button to save the adjustment results in the nonvolatile memory. (At this time "EFB = SAV" is displayed for a moment, and then "EFB = MO-W" is displayed.)
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8. Rotate the lAMSL knob so that the waveform of the oscilloscope is the specified value. (The figure of the " EFB = " and the waveform are changed by rotating the lAMSL knob.) In this adjustment. the waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Write power traverse adjustment)
(Traverse waveform) A
18. Press the YES button to save the adjustment results in the nonvolatile memory. (At this time "EFB = SAV" is displayed for a moment) Then, "EF CD ADJUS" appears and the disc stops rotating automatically. 19. Press the A button to eject the check disc.
5-12. Focus Bias Adjustment
Adjustment procedure: 1. Load the test disc (MDW-74/AU-1). The disc is loaded by pushing the tray. 2. Rotate the lAMSL knob to display "CPLAY MODE" (C30). 3. Press the YES button to display "CPLAY MID". 4. After "C = AD = " appears, press the MENU/NO button. 5. Rotate the lAMSL knob to display "FBIAS CHECK" (C13). 6. Press the YES button to display " / a= ". The first four digits indicate the C1 error rate, the two digits after "/" indicate ADER, and the two digits after "a = " indicate the focus bias amount. 7. Rotate the lAMSL knob in the clockwise direction and find the focus bias amount at which the C1 error rate becomes approx. 200. (Refer to Note 2.) 8. Press the YES button to display " / b= ". 9. Rotate the lAMSL knob in the counterclockwise direction and find the focus bias amount at which the C1 error rate becomes approx. 200. (Refer to Note 2.) Adjust the lAMSL knob so that the C1 error rate becomes almost same value as the value set in step 7. 10. Press the YES button to display " / c= ". 11. Confirm that the C1 error rate is below 50 and the ADER is 00 and press the YES button. 12. If "( )" of " ( )" is above 20, press the YES button. If it is below 20, press the MENU/NO button and perform the adjustment from the step 2 again. 13. Press the A button to eject the test disc. Note 1: The relation between the C1 error and focus bias is as shown in the following figure. Find points a and b in the following figure using the above adjustment. The focal point position C is automatically calculated from points a and b. Note 2: As the C1 error rate changes, perform the adjustment using the average value.
C1 error Approx. 200
VC
B Specification: A = B
9. Press the YES button to save the adjustment results in the nonvolatile memory. (At this time "EFB = SAV" is displayed for a moment) 10. "EFB = MO-P" appears and the optical pick-up moves to the internal circumference of the pit area automatically and servo is imposed. 11. Rotate the lAMSL knob so that the waveform of the oscilloscope moves closer to the specified value. In this adjustment. the waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Write power traverse adjustment)
(Traverse waveform) A
VC
B Specification: A = B
12. Press the YES button to save the adjustment results in the nonvolatile memory. (At this time "EFB = SAV" is displayed for a moment) Then, "EF MO ADJUS" appears and the disc stops rotating automatically. 13. Press the A button to eject the disc. 14. Load a check disc (TDYS-1). The disc is loaded by pushing the tray. 15. Rotate the lAMSL knob to display "EF CD ADJUS" (C12). 16. Press the YES button to display "EFB = CD". The servo is imposed automatically. 17. Rotate the lAMSL knob so that the waveform of the oscilloscope makes closer to the specified value. In this adjustment. the waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.
(Traverse waveform) A
b
c
a
Focus bias value (F. BIAS)
VC
B Specification: A = B
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5-13. Error Rate Check
5-13-1. CD Error Rate Check Checking procedure: 1. Load a check disc (TDYS-1). The disc is loaded by pushing the tray. 2. Rotate the lAMSL knob to display "CPLAY MODE" (C30). 3. Press the YES button to display "CPLAY MID". 4. The display is changed to "C = AD = ". 5. Confirm that the C1 error rate is below 20. 6. Press the MENU/NO button to stop playing back, and press the A button to eject the check disc. 5-13-2. MO Error Rate Check Checking procedure: 1. Load a test disc (MDW-74/AU-1). The disc is loaded by pushing the tray. 2. Rotate the lAMSL knob to display "CPLAY MODE" (C30). 3. Press the YES button to display "CPLAY MID". 4. The display is changed to "C = AD = ". 5. Confirm that the C1 error rate is below 50 and the ADER is below 2. 6. Press the MENU/NO button to stop playing back, and press the A butt