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Service Manual
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MDS-JE470
SERVICE MANUAL
Ver 1.0 2001. 05
US Model Canadian Model AEP Model UK Model E Model Australian Model
US and foreign patents licensed form Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism MD Mechanism Type Optical Pick-up Type
MDS-S50 MDM-7A KMS-260B/260E
SPECIFICATIONS
MiniDisc digital audio system Disc MiniDisc Laser Semiconductor laser ( =780 nm) Emission duration: continuous Laser output MAX 44.6 µW1) 1) 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 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)/ATRAC 3 Modulation system EFM (Eight-to-Fourteen Modulation) Number of channels 2 stereo channels Frequency response 5 to 20,000 Hz ±0.3 dB Signal-to-noise ratio Over 96 dB during play Wow and flutter Below measurable limit System
I nputs
ANALOG IN Jack type: phono Impedance: 47 kilohms Rated input: 500 mVrms Minimum input: 125 mVrms Connector type: square optical Impedance: 660 nm (optical wave length)
DIGITAL OPTICAL IN
Outputs
ANALOG OUT Jack type: phono Rated output: 2 Vrms (at 50 kilohms) Load impedance: over 10 kilohms
-- Continued on next page --
MINIDISC DECK
9-873-891-11
2001E0200-1 © 2001.5
Sony Corporation
Home Audio Company Shinagawa Tec Service Manual Production Group
MDS-JE470
General Power requirements
U.S.A. and Canadian models: 120 V AC, 60Hz European model: 230 V AC, 50/60Hz Australian model: 240 V AC, 50/60Hz Hong Kong model: 220 240 V AC, 50/60Hz Other models: 110 120/220 240 V AC, 50/60Hz Adjustable with voltage selector Power consumption 14 W (0.5 W in standby mode) Dimensions (approx.) 430 X 95 X285 mm (w/h/d) incl. projecting parts and controls Mass (approx.) 3.0 kg
Supplied accessories
Audio connecting cords (2) Optical cable (1) Remote commander (remote) (1) R6 (size-AA) batteries (2) US and foreign patents licensed from Dolby Laboratories. Design and specifications are subject to change without notice.
SELF-DIAGNOSIS FUNCTION
The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes which show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box in the instruction manual. For details on how to check error codes during servicing, refer to the following "Procedure for using the SelfDiagnosis Function (Error History Display Mode)".
Self-diagnosis function
The deck's self-diagnosis function automatically checks the condition of the MD deck when an error occurs, then issues a three- or five-digit code and an error message on the display. If the code and message alternate, find them in the following table and perform the indicated countermeasure. Should the problem persist, consult your nearest Sony dealer.
Three- or fivedigit code/ Message C11/Protected Cause/Remedy The inserted MD is record-protected. , Take out the MD and close the recordprotect slot. You tried to record a CD with a format that the external device connected to the deck does not support, such as CD-ROM or video CD. , Remove the disc and insert a music CD. The recording was not made properly. , Set the deck in a stable surface, and repeat the recording procedure. The inserted MD is dirty (with smudges, fingerprints, etc.), scratched, or substandard in quality. , Replace the disc and repeat the recording procedure. The deck could not read the TOC on the MD properly. , Take out the MD and insert it again.
Three- or fivedigit code/ Message
Cause/Remedy The deck could not read the TOC on the MD properly. , Insert another disc. , If possible, erase all the tracks on the MD . The sound source is a copy of commercially available music software, or you tried to record a CD-R (Recordable CD). , The Serial Copy Management System prevents making a digital copy. You cannot record a CD-R. The sporadic appearance of this message is caused by the digital signal being recorded. This will not affect the recording.
C14/Toc Error
C41/Cannot Copy
C12/Cannot Copy
C71/Din Unlock
C13/REC Error
E0001/ MEMORY NG
While recording from a digital component connected through the DIGITAL IN connector, the digital connecting cable was unplugged or the digital component turned off. , Connect the cable or turn the digital component back on. There is an error in the internal data that the deck needs in order to operate. , Consult your nearest Sony dealer. There is a problem with the optical pickup. , The optical pick-up may have failed. Consult your nearest Sony dealer.
E0101/ LASER NG
C13/Read Error
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.
2
MDS-JE470
1. While pressing the lAMSL knob and x button, connect the power plug to the outlet, and release the lAMSL knob and x button. When the test mode is set, "[Check]" will be displayed. 2. Rotate the lAMSL knob and when "[Service]" is displayed, press the YES button. 3. Rotate the lAMSL knob and display "Err Display". 4. Pressing the YES button sets the error history mode and displays "op rec tm". 5. Select the contents to be displayed or executed using the lAMSL knob. 6. Pressing the lAMSL knob will display or execute the contents selected. 7. Pressing the lAMSL knob another time returns to step 4. 8. Pressing the MENU/NO button displays "Err Display" and exits the error history mode. 9. To exit the test mode, press the REPEAT button. The unit sets into the STANDBY state, the disc is ejected, and the test mode ends.
ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS
Selecting the Test Mode Display op rec tm History Displays the total recording time. When the total recording time is more than 1 minute, displays the hour and minute When less than 1 minute, displays "Under 1 min" The display time is the time the laser is set to high power, which is about 1/4 of the actual recording time. Displays the total playback time. When the total playback time is more than 1 minute, displays the hour and minute When less than 1 minute, displays "Under 1 min" Displays the total rotating time of the spindle motor. When the total rotating time is more than 1 minute, displays the hour and minute When less than 1 minute, displays "Under 1 min" Displays the total number of retry errors during recording and playback Displays "r xx p yy". xx is the number of errors during recording. yy is the number of errors during playback. This is displayed in hexadecimal from 00 to FF. Displays the total number of errors Displays "total xx". This is displayed in hexadecimal from 00 to FF. Displays the past ten errors. Displays "0x ErrCd@@". X is the history number. The younger the number, the more recent is the history (00 is the latest). @@ is the error code. Select the error history number using the lAMSL knob. Displays the past five retry addresses. Displays "xx ADRS yyyy", xx is the history number, yyyy is the cluster with the retry error. Select the error history number using the lAMSL knob. Mode for erasing the error and retry address histories Procedure 1. Press the lAMSL knob when displayed as "er refresh". 2. Press the YES button when the display changes to "er refresh?". When "complete!" is displayed, it means erasure has completed. Be sure to check the following after executing this mode. *Data has been erased. *Perform recording and playback, and check that the mechanism is normal.
Mode for erasing the total time of recording and playback Procedure 1. Press the lAMSL knob when displayed as "tm refresh". 2. Press the YES button when the display changes to "tm refresh?". When "complete!" is displayed, it means erasure has completed.
op play tm
spdl rp tm
retry err
total err
err history
retry adrs
er refresh
tm change
op change
Mode for erasing the total time of op rec tm, op play tm. These histories are based on the time of replacement of the optical pickup. If the optical pick-up has been replaced, perform this procedure and erase the history. Procedure 1. Press the lAMSL knob when displayed as "op change". 2. Press the YES button when the display changes to "op change?". When "Complete!" is displayed, it means erasure has completed.
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MDS-JE470
Display spdl change
History Mode for erasing the total spdl rp tm time These histories are based on the time of replacement of the spindle motor. If the spindle motor has been replaced, perform this procedure and erase the history. Procedure 1. Press the lAMSL knob when displayed as "spdl change" 2. Press the YES button when the display changes to "spdl change?" When "Complete!" is displayed, it means erasure has completed.
Table of Error Codes
Error Code 10 12 20 21 22 23 24 30 31 40 41 42 43 50 51 Could not load Loading switches combined incorrectly Timed out without reading the top of PTOC Could read top of PTOC, but detected error Timed out without accessing UTOC Timed out without reading UTOC Error in UTOC Could not start playback Error in sector Retry cause generated during normal recording Retried in DRAM overflow Retry occurred during TOC writing Retry aborted during S.F editing Other than access processing, and could not read address. Focus NG occurred and overran. Description
TABLE OF CONTENTS 1. SERVICING NOTES ........................................................ 5 2. GENERAL ........................................................................ 12 3. DISASSEMBLY
3-1. Disassembly flow .............................................................. 13 3-2. Upper Case (408226) ........................................................ 14 3-3. Front Panel Section ........................................................... 14 3-4. Main Board ....................................................................... 15 3-5. PT Board, VOL-SEL Board (SP model) ........................... 15 3-6. Mechanism Deck Section ( MDM-7A) ............................. 16 3-7. Over Light Head (HR901), BD Board .............................. 16 3-8. Holder Assy ....................................................................... 17 3-9. Loading Motor Assy (M103) ............................................ 17 3-10. Sled Motor Assy (M102), Slider ....................................... 18 3-11. Optical Pick-up .................................................................. 18 3-12. Spindle Moter Assy (M101) .............................................. 19
4. TEST MODE ......................................................................20 5. ELECTRICAL ADJUSTMENTS ............................... 25 6. DIAGRAMS
MODEL IDENTIFICATION
-- BACK PANEL --
Part No.
MODEL
AEP, UK models US model CND model SP models HK model AUS model · Abbreviation CND : Canadian model SP : Singapore model HK : Hong Kong model AUS : Australian model
PARTS No.
4-233-025-0s 4-233-025-1s 4-233-025-2s 4-233-025-3s 4-233-025-4s 4-233-025-5s
6-1. Circuit Boards Location ...................................................... 36 6-2. Block Diagrams · BD Section ....................................................................... 38 · Main Section .................................................................... 39 6-3. Printed Wiring Board BD Board ................................... 40 6-4. Schematic Diagram BD Section (1/2) ........................... 41 6-5. Schematic Diagram BD Section (2/2) ........................... 42 6-6. Schematic Diagram Main Section (1/2) ........................ 43 6-7. Schematic Diagram Main Section (2/2) ........................ 44 6-8. Printed Wiring Board Main Section ............................. 45 6-9. Printed Wiring Board Display Section .......................... 46 6-10. Schematic Diagram Display Section .......................... 47 6-11. Printed Wiring Board Power Section ......................... 48 6-12. Schematic Diagram Power Section ............................ 49 6-13. IC Block Diagrams ........................................................... 50 6-14. IC Pin Functions ............................................................... 52
7. EXPLODED VIEWS
7-1. Chassis Section ................................................................... 59 7-2. Front Panel Section ............................................................. 60 7-3. Mechanism Section-1 (MDM-7A) ...................................... 61 7-4. Mechanism Section-2 (MDM-7A) ...................................... 62
8. ELECTRICAL PARTS LIST ........................................ 63
4
MDS-JE470 SECTION 1 SERVICE NOTES
SAFETY CHECK-OUT
(US model only) 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. 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 Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight. Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. This caution label is located inside the unit.
LEAKAGE
The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microampers). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers' instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The "limit" indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)
To Exposed Metal Parts on Set
0.15µF
1.5k
AC voltmeter (0.75V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. Notes on chip component replacement · Never reuse a disconnected chip component. · Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing · Keep the temperature of soldering iron around 270°C during repairing. · Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). · Be careful not to apply force on the conductor when soldering or unsoldering.
SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 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 IDENTIFÉS 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 PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
5
MDS-JE470
JIG FOR CHECKING BD BOARD WAVEFORM
The special jig (J-2501-196-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be performed are shown as follows. GND I+3V IOP TE VC RF FE : Ground : For measuring IOP (Check the deterioration of the optical pick-up laser) : For measuring IOP (Check the deterioration of the optical pick-up laser) : TRK error signal (Traverse adjustment) : Reference level for checking the signal : RF signal (Check jitter) : Focus error signal
CN105
IOP TE I+3V GND FE VC RF
1 I+3V IOP GND TE FE VC RF 7 I+3V Iop GND TE FE VC RF
for MDM-7A
6
MDS-JE470
Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF BD BOARD) ARE REPLACED
The Iop value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to look at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD board), record the Iop value on the optical pick-up according to the following procedure. Record Precedure: 1. While pressing the l AMS L knob and x button, connect the power plug to the outlet, and release the l AMS L knob and x button. 2. Rotate the l AMS L knob to display "[Service]", and press the YES button. 3. Rotate the l AMS L knob to display "Iop Write" (C05), and press the YES button. 4. The display becomes "Ref=@@@.@" (@ is an arbitrary number) and the numbers which can be changed will blink. 5. Input the Iop value written on the optical pick-up. To select the number : Rotate the l AMS L knob. To select the digit : Press the l AMS L knob. 6. When the YES button is pressed, the display becomes "Measu=@@@.@" (@ is an arbitrary number). 7. As the adjustment results are recorded for the 6 value. Leave it as it is and press the YES button. 8. "Complete!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write". 9. Press the REPEAT button to complete. Display Precedure: 1. While pressing the l AMS L knob and x button, connect the power plug to the outlet, and release the l AMS L knob and x button. 2. Rotate the l AMS L knob to display "[Service]", and press the YES button. 3. Rotate the l AMS L knob to display "Iop Read" (C26). 4. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ : indicates the Iop value labeled on the optical pick-up. ##.# : indicates the Iop value after adjustment 5. To end, press the l AMS L button or MENU/NO button to display "Iop Read". Then press the REPEAT button.
7
MDS-JE470
OPTICAL PICK-UP BLOCK TYPE DISCRIMINATION
There are two types of the optical pick-up block in this model. These are compatible except for the laser power. Check the type of the optical pick-up block before replacement. Ajdust following items after replacing the optical pick-up block. · 5-6-2. Laser Power Check (See page 28) · 5-10. LASER POWER ADJUSTMENT (See page 31) Differences KMS-260B Color of the adhesive agent at PDIC portion Form of FPC retainer plate APC variable resistor Pink Close the hole on SL base Small volume (2 type) White Not close the hole on SL base Big variable resistor (3 type) and chip resistor (Fig. A) Small variable resistor (2 type) and chip resistor (Fig. B) KMS-260E
Fig. B type is for repair. · Abbreviation 260B: KMS-260B model 260E: KMS-260E model
KSN-260B
KSN-260E
Hold on SL base
(Fig A) CHIP 3 type variable resistor (Fig B) CHIP
Hold on SL base APC variable resistor Adhesive agent at PDIC portion
FPC retainer plate
2 type variable resistor
Adhesive agent at PDIC portion
FPC retainer plate
8
MDS-JE470
CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS
Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in "5 Electrical Adjustments". · 5-6-2. Laser power check (see page 28) · 5-6-3. Iop Compare (see page 28) · 5-6-4. Auto Check (see page 29) Note: The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments. When performing adjustments, use the specified values for adjustments.
FORCED RESET
The system microprocessor can be reset in the following procedure. Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc. Procedure : Remove the short-pin attached to CN406, and then attach it again. [MAIN BOARD] (Component Side)
@CN406
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MDS-JE470
RETRY CAUSE DISPLAY MODE
· In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. During playback, the "track mode" for obtaining track information will be set. This is useful for locating the faulty part of the unit. · The following will be displayed : During recording and stop : Retry cause, number of retries, and number of retry errors. During playback : Information such as type of disc played, part played, copyright. These are displayed in hexadecimal. Procedure: 1. Insert the recordable disc. 2. Press MENU/NO button to display "Edit Menu" on the fluorescent display. 3. Turn l AMS L button to display "All Erase?" on the fluorescent display. 4. Press YES button to display "All Erase??" on the fluorescent display. 5. Press YES button, "Complete!" is displayed on the fluorescent display and it turns off immediately. 6. Procedure 1: Press the x button continuously for about 10 seconds. Procedure 2: Press the LEVEL/DISPLAY/CHAR button while pressing the x button and MENU/NO button. 7. When the mode is set, "RTs 00c 00e 000" is displayed. 8. Press the z REC button to start recording. Then press the X button and start recording. 9. To check the "track mode", press the H button to start play. 10.To exit the test mode, press the @/1 button, and turn OFF the power. When "TOC" disappears, disconnect the power plug from the outlet. If the test mode cannot be exited, refer to "Forced Reset" on page 9.
Fig. 1 Reading the Test Mode Display (During recording and stop)
RTs@@c##c*** Fluorescent display tube display @@ : Cause of retry ## : Number of retries *** : Number of retry errors
Fig. 2 Reading the Test Mode Display (During playback)
@@###**$$ Fluorescent display tube display @@ ### ** $$ : : : : Parts No. (name of area named on TOC) Cluster } Address (Physical address on disc) Sector Track mode (Track information such as copyright information of each part)
Reading the Retry Cause Display Higher Bits Hexadecimal 8 Bit Binary 0 0 0 0 0 0 0 1 4 0 0 0 0 0 0 1 0 2 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 Lower Bits 8 0 0 0 1 0 0 0 0 4 0 0 1 0 0 0 0 0 2 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0
Hexadecimal 01 02 04 08 10 20 40 80
Cause of Retry shock ader5
Occurring conditions When track jump (shock) is detected When ADER was counted more than five times continuously When DIN unlock is detected When not in focus When ABCD signal level exceeds the specified range When CLV is unlocked When access operation is not performed normally
b7 b6 b5 b4 b3 b2 b1 b0
Discontinuous address When ADIP address is not continuous DIN unlock FCS incorrect IVR rec error CLV unlock Access fault
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MDS-JE470
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 b2 The retry cause in this case is combined of "access fault", "IVR rec error", and "ader5". Reading the Track Mode Display Higher Bits Hexadecimal 8 Bit Binary 0 0 0 0 0 0 0 1 4 0 0 0 0 0 0 1 0 2 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 Lower Bits 8 0 0 0 1 0 0 0 0 4 0 0 1 0 0 0 0 0 2 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 Hexadecimal 01 02 04 08 10 20 40 80 When 0 Emphasis OFF Monaural This is 2-bit display. Normally 01. 01:Normal audio. Others:Invalid Audio (Normal) Original Copyright Write prohibited Invalid Digital copy No copyright Write allowed Emphasis ON Stereo Details When 1
b7 b6 b5 b4 b3 b2 b1 b0
Reading the Display: Convert the hexadecimal display into binary display. If more than two causes, they will be added. Example When 84 is displayed: Higher bit : 8 = 1000 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
11
MDS-JE470 SECTION 2 GENERAL
This section is extracted from instruction manual.
Parts Identification
The items are arranged in alphabetical order. Refer to the pages indicated in parentheses ( ) for details.
Main unit
1 2 3 4 5 6 7 8 9 0 qa qs qd
STANDBY EJECT
MDLP
MENU/ NO AMS
YES
TIMER GROUP ON/OFF SKIP PHONE LEVEL PC LINK PLAY MODE LEVEL/ REPEAT DISPLAY/CHAR PUSH ENTER REC TIME
REC OFF PLAY PHONES
INPUT
REC MODE
CLEAR
MIN
MAX
(KEYBOARD)
qf qg
qh
qj qk ql
w;
wa
ws
wd
wf wg
wh
AMS wh (15) (20) (25) (35) (39) CLEAR wg (23) (30) (40) Display window wa EJECT A 8 (11) (20) (25) GROUP ON/OFF1) 3 (13) (22) (31) GROUP SKIP1) 4 (13) (22) (31) INPUT ws (11) LEVEL/DISPLAY/CHAR w; (11) (21) (29) MD insertion slot 6 MDLP indicator 7 (14) (21) MENU/NO qs (15) (22) (25) (35) (39)
PC LINK (KEYBOARD)1) qj (39) PHONE LEVEL1) qh (21) PHONES jack1) qg (17) (21) (36) PLAY MODE qk (20) (37) REC MODE ws (14) (22) REC z wf (11) Remote sensor2) 2 REPEAT ql (20) STANDBY indicator 1 (11) (20) TIME1) 5 (17) (21) TIMER1) qf (37) YES qd (15) (23) (25) (35) (39)
BUTTON DESCRIPTIONS
`/1 1 (11) (20) (25) H 9 (11) (20) (37) (40) X 0 (11) (20) (39) (40) x qa (11) (20) (25) (37) (40) m/M wd (20) (26) (40) 1) 2) MDS-JE770 only. MDS-JE770 only. For MDSJE470, the remote sensor is located on the display window.
12
SECTION 3 DISASSEMBLY
· This set can be disassembled in the order shown below.
MDS-JE470
3-1. DISASSEMBLY FLOW
· Abbreviation SP : Singapore
SET
3-2 UPPER CASE (408226)
3-3 FRONT PANEL SECTION
3-4 MAIN BOARD
3-5 PT BOARD VOL-SEL BOARD (SP model)
3-6 MECHANISM DECK SECTION (MDM-7A)
3-7 BD BOARD
3-7 OVER LIGHT HEAD (HR901) 3-7 BD BOARD
3-8 HOLDER ASSY
3-8 HOLDER ASSY
3-10 SLED MOTOR ASSY (M102)
3-9 LOADING MOTOR ASSY (M103)
3-11 OPTICAL PICK-UP (KMS-260B/260E)
3-12 SPINDLE MOTOR ASSY (M101)
Note 1: The processes enclosed with , remove in the any order. Note 2: You cannot go to the next process until every process enclosed with
has done.
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MDS-JE470
3-2. UPPER CASE (408226)
2 Case (408226) 1 Two screws (CASE 3TP2) 1 Screw (CASE 3TP2)
1 Two screws (CASE 3TP2)
3-3. FRONT PANEL SECTION
3 Connector (CN830) 5 Claw
2 Connector (CN390)
1 Wire (flat type) (17core) (CN3) 4 Two screws (+BVTP3x8)
5 Claw
6 Front panel 4 Two screws (+BVTP3x8)
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MDS-JE470
3-4. MAIN BOARD
6 Two screws (+BVTP3x8)
3 Connector (CN400)
2 Wire (flat type) (23core) (CN1)
1 Wire (flat type) (27core) (CN2) 7 MAIN board 4 Two screws (+BVTP3x8)
5 screw (+BVTP3x8)
3-5. PT BOARD, VOL-SEL BOARD (SP model)
3 Three screws (+PTTWH M3) 5 PT board
1 Connector (CN900) 6 Two screws (+BVTP3x8) (SP model) 2 Connector (CN990) (SP model) 7 VOL-SEL board (SP model) 4 Nylom rivet (dia 3)
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MDS-JE470
3-6. MECHANISM DECK SECTION (MDM-7A)
3 Mechanism deck 2 Two step screws (+BVTTWH M3) 2 Two step screws (+BVTTWH M3)
1 Harness
3-7. OVER LIGHT HEAD (HR901), BD BOARD
Note 1: If you disconnect the connector (CN104), you can remove the BD board without removing the over write head (HR901). Note 2: Be careful to handle the over write head (HR901) because it is easy to be damaged.
2 Screw (P1.7X6)
3 Head, over light (HP901)
4 Remove the solder (four portion)
8 BD board 6 1 Connector (CN104)
4 Remove the solder (five portion) 5 Two screws (BTP2X6)
7 FLEXIBLE board (CN101)
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MDS-JE470
3-8. HOLDER ASSY
2 Claw 3 6 Holder ASSY
5
4 Boss
4 Boss 1 Spring (holder), tension
3-9. LOADING MOTOR ASSY (M103)
1 Belt (loading)
2 Two screws (PWH1.7x2.5)
3 Motor ASSY, loading (M103)
17
MDS-JE470
3-10. SLED MOTOR ASSY (M102), SLIDER
3 4 Slider (EJ)
5 Remove the claw. Shift the slider in the arrow A direction.
6 Slider 1 Two screws (BTP2X6) 2 Guide (L)
A
8 Lever (head)
9 Two screws (PWH1.7X2.5) 7 Lever (CHG)
0 Motor ASSY, sled (M102)
3-11. OPTICAL PICK-UP
qa Optical pick-up (KMS-260B/260E) 1 FLEXIBLE board
7 Main shaft
0 SL base
9 Screw (P1.7X6) 8 6 Two screws (K2X6)
4 Screw (BTP2X6)
5 Base (BU-A)
3 Gear (SD) 2 Screw (M1.7), tapping
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MDS-JE470
3-12. SPINDLE MOTER ASSY (M101)
2 Spindle motor ASSY (M101)
1 Three screws (M1.7), tapping
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MDS-JE470
SECTION 4 TEST MODE
4-1. PRECAUTIONS FOR USE OF TEST MODE
· As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it. Even if the 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. 4-1-1. Recording laser emission mode and operating buttons · · · · · · · · Continuous recording mode (CREC 1MODE) (C35) Laser power check mode (LDPWR CHECK) (C13) Laser power adjustment mode (LDPWR ADJUS) (C04) Iop check (Iop Compare) (C27) Iop value nonvolatile writing (Iop NV Save) (C06) Traverse (MO) check (EF MO CHECK) (C14) Traverse (MO) adjustment (EF MO ADJUS) (C07) When pressing the z REC button.
4-2. SETTING THE TEST MODE
The following are two methods of entering the test mode. Procedure 1: While pressing the l AMS L knob and x button, connect the power plug to an outlet, and release the l AMS L knob and x button. When the test mode is set, "[Check]" will be displayed. Rotating the l AMS L knob switches between the following three groups; ··· y Check y Service y Develop y ···. Procedure 2: While pressing the l AMS L knob, connect the power plug to the outlet and release the l AMS L 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. NOTE: Do not use the test mode in the [Develop] group. If used, the unit may not operate normally. If the [Develop] group is set accidentally, press the MENU/NO button immediately to exit the [Develop] group.
4-3. EXITING THE TEST MODE
Press the REPEAT button. The disc is ejected when loaded, and "Standby" display blinks, and the STANDBY state is set.
4-4. BASIC OPERATIONS OF THE TEST MODE
All operations are performed using the l AMS L knob, YES button, and MENU/NO button. The functions of these buttons are as follows.
Function name MENU/NO button YES button AMS knob Left or Right Push Function Cancel or move to top hierarchy Set Select Set submenu
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MDS-JE470
4-5. SELECTING THE TEST MODE
There are 26 types of test modes as shown below. The groups can be switched by rotating the l AMS L knob. After selecting the group to be used, press the YES button. After setting a certain group, rotating the l AMS L knob switches between these modes. Refer to "Group" in the table for details selected. All adjustments and checks during servicing can be performed in the test mode in the Service group. NOTE: Do not use the test mode in the [Develop] group. If used, the unit may not operate normally. If the [Develop] group is set accidentally, press the MENU/NO button immediately to exit the [Develop] group.
Group Display AUTO CHECK Err Display TEMP ADJUS LDPWR ADJUS Iop Write Iop NV Save EF MO ADJUS EF CD ADJUS FBIAS ADJUS AG Set (MO) AG Set (CD) TEMP CHECK LDPWR CHECK EF MO CHECK EF CD CHECK FBIAS CHECK ScurveCHECK VERIFYMODE DETRK CHECK 0920 CHECK Iop Read Iop Compare ADJ CLEAR INFORMATION CPLAY1MODE CREC 1MODE No. C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C25 C26 C27 C28 C31 C34 C35 Automatic self-diagnosis Error history display, clear Temperature compensation offset adjustment Laser power adjustment Iop data writing Writes current Iop value in read nonvolatile memory using microprocessor Traverse (MO) adjustment Traverse (CD) adjustment Focus bias adjustment Focus, tracking gain adjustment (MO) Focus, tracking gain adjustment (CD) Temperature compensation offset check Laser power check Traverse (MO) check Traverse (CD) check Focus bias check S-curve check Nonvolatile memory check Detrack check Most circumference check Iop data display Comparison with initial Iop value written in nonvolatile memory Initialization of nonvolatile memory for adjustment values Display of microprocessor version, etc. Continuous playback mode Continuous recording mode Details Mark Check Service
· For details of each adjustment mode, refer to "5. Electrical Adjustments". For details of "Err Display", refer to "Self-Diagnosis Function" on page 2. · If a different mode has been selected by mistake, press the MENU/NO button to exit that mode. · Modes with (X) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set accidentally, press the MENU/NO button to exit the mode immediately.
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MDS-JE470
4-5-1. Operating the Continuous Playback Mode 1. Entering the continuous playback mode 1 Set the disc in the unit. (Whichever recordable discs or discs for playback only are available.) 2 Rotate the l AMS L knob and display "CPLAY1 MODE"(C34). 3 Press the YES button to change the display to "CPLAY1 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. "CPLAY1 MID" t "CPLAY1 OUT" t "CPLAY1 IN" When pressed another time, the parts to be played back can be moved. 2 When access completes, the display changes to "C = AD = ". Note : The numbers " " displayed show you error rates and ADER. 3. Ending the continuous playback mode 1 Press the MENU/NO button. The display will change to "CPLAY1 MODE"(C34). 2 Press the AEJECT button to remove the disc. Note : The playback start addresses for IN, MID, and OUT are as follows. IN 40h cluster MID 300h cluster OUT 700h cluster 4-5-2. Operating the Continuous Recording Mode (Use only when performing self-recording/palyback check.) 1. Entering the continuous recording mode 1 Set a recordable disc in the unit. 2 Rotate the l AMS L knob and display "CREC1 MODE" (C35). 3 Press the YES button to change the display to "CREC1 MID". 4 When access completes, the display changes to "CREC 1 ( )" and REC lights up. 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. "CREC1 MID" t "CREC1 OUT" t "CREC1 IN" When pressed another time, the parts to be recorded can be changed. REC goes off. )" and REC lights up. 2 When access completes, the display changes to "CREC 1 ( Note : The numbers " " displayed shows you the recording position addresses. 3. Ending the continuous recording mode 1 Press the MENU/NO button. The display changes to "CREC1 MODE" (C35) and REC goes off. 2 Press the A EJECT button to remove the disc. Note 1 : The recording start addresses for IN, MID, and OUT are as follows. IN 40h cluster MID 300h cluster OUT 700h cluster Note 2 : The 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.
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MDS-JE470
4-6. FUNCTIONS OF OTHER BUTTONS
Function G Contents Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking servo turns ON/OFF. x M m REC MODE PLAY MODE LEVEL/DISPLAY/CHAR A REPEAT 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. Exits the test mode.
4-7. TEST MODE DISPLAYS
Each time the LEVEL/DISPLAY/CHAR button is pressed, the display changes in the following order. When CPLAY and CREC are started, the display will forcibly be switched to the error rate display as the initial mode. 1. Mode display Displays "TEMP ADJUST", "CPLAY1MODE", etc. 2. Error rate display Displays the error rate in the following way. C= AD = C = Indicates the C error. AD = Indicates ADER. 3. Address display The address is displayed as follows. (MO:recordable disc, CD:playback only disc) If the REC MODE button is pressed , the display switches from groove to pit or vice versa. s= (MO pit and CD) h= h= a= (MO groove) h = Indicates the header address. s = Indicates the SUBQ address. a = Indicates the ADIP address. Note: "" is displayed when the address cannnot be read.
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) C1 error and Jitter display (Not used in servicing) AD error and Jitter display (Not used in servicing)
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MDS-JE470
4-8. MEANINGS OF OTHER DISPLAYS
Contents Display G X REC SYNC L.SYNC OVER B/1 A-/REP REC MODE DISC/LP2 SLEEP/SHUF MONO Servo ON Tracking servo OFF Recording mode ON CLV low speed mode ABCD adjustment completed Tracking offset cancel ON Tracking auto gain OK Focus auto gain OK Pit High reflection CLV S CLV LOCK Groove Low reflection CLV A CLV UNLOCK Tracking offset cancel OFF When Lit Servo OFF Tracking servo ON Recording mode OFF CLV normal mode When Off
4-9. AUTOMATIC SELF-DIAGNOSIS FUNCTION
This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up. To perform this test mode, the laser power must first be checked. Perform AUTO CHECK after the laser power check and Iop check. Procedure 1. Press the YES button. If "LDPWR " is displayed, it means that the laser power check has not been performed. In this case, perform the laser power check and Iop compare, and then repeat from step 1. 2. If a disc is in the mechanical deck, it will be ejected forcibly. "DISC IN" will be displayed in this case. Load a test disc (MDW-74/GA-1) which can be recorded. 3. If a disk is loaded at step 2, the check will start automatically. 4. When "XX CHECK" is displayed, the item corresponding to XX will be performed. When "06 CHECK" completes, the disc loaded at step 2 will be ejected. "DISC IN" will be displayed. Load the check disc (MD) TDYS-1. 5. When the disc is loaded in step 4, the check will automatically be resumed from "07 CHECK". 6. After completing to test item 12, check OK or NG will be displayed. If all items are OK, "CHECK ALL OK" will be displayed. If any item is NG, it will be displayed as "NG:xxxx". When "CHECK ALL OK" is displayed, it means that the optical pick-up is normal. Check the operations of the other spindle motor, thread motor, etc. When displayed as "NG:xxxx", it means that the optical pick-up is faulty. In this case, replace the optical pick-up.
4-10. INFORMATION
Display the software version. Procedure 1. If displayed as "INFORMATION", press the YES button. 2. The software version will be displayed. 3. Press the MENU/NO button to end this mode.
4-11. WHEN MEMORY NG IS DISPLAYED
If the nonvolatile memory data is abnormal, "E001"/"MEMORY NG" will be displayed so that the MD deck does not continue operations. In this case, set the test mode promptly and perform the following procedure. Procedure 1. Set the test mode. (Refer to 4-2.) 2. Normally a message for selecting the test mode will be displayed. However if the nonvolatile memory is abnormal, the following will be displayed. "INIT EEP?" 3. Press the STOP button and A EJECT button together. 4. Rotate the l AMS L knob and select MDM-7A. 5. Press the l AMS L knob. If the nonvolatile memory is successfully overwritten, the normal test mode will be set and a message to select the test mode will be displayed. Note: When this setting is doing, readjustment is necessary. (Adjustment it same as IC195 exchanged)
24
MDS-JE470 SECTION 5 ELECTRICAL ADJUSTMENTS
Note : 260B: KMS-260B 260E: KMS-260E
5-1. PARTS REPLACEMENT AND ADJUSTMENT
If malfunctions caused by Optical pick-up such as sound skipping are suspected, follow the following check.
Check before replacement
Start
5-6-2. Laser Power Check (See page 28) OK
NG
5-6-3. Iop Compare (See page 28) OK
NG
5-6-4. Auto Check (See page 29) OK
NG
Replace Optical pick-up or MDM-7A
Other faults are suspected. Check the threading mechanism, etc.
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MDS-JE470
Adjustment flow
Start
· Abbreviation OP: Optical pick-up
Replace IC195 NO
YES
After turning off and then on the power, initialize the EEPROM For details, refer to 4-11. WHEN MEMORY NG IS DISPLAYED (See page 24)
Replace OP or IO195 NO
YES
5-7. INITIAL SETTING OF ADJUSTMENT VALUE (See page 31)
Replace IC101, IC195, or D101 NO
YES
5-9. TEMPERATURE COMPENSATION OFFSET ADJUSTMENT (See page 31)
Replace OP, IC190, or IC195 NO
YES
5-10. LASER POWER ADJUSTMENT (See page 31)
Replace OP, IC102, IC190, or IC195 NO
YES
5-11. Iop NV SAVE (See page 32)
Replace OP, IC101, IC151, or IC195 NO
YES
5-12. TRAVERSE ADJUSTMENT (See page 32) 5-13. FOCUS BIAS ADJUSTMENT (See page 33) 5-16. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT (See page 34)
Replace OP NO
YES
OP change in Err Display mode Iop write
Replace the spindle motor NO 5-6-4. Auto Check (See page 29)
YES
Spdl change in Err Display mode
End adjustments
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MDS-JE470
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 PICKUP (KMS-260B/260E)
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
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. 2) Set the test mode when performing adjustments. After completing the adjustments, exit the test mode. Perform the adjustments and checks in "group S" of the test mode. 3) Perform the adjustments to be needed in the order shown. 4) Use the following tools and measuring devices. · Check Disc (MD) TDYS-1 (Parts No. 4-963-646-01) · Test Disk (MDW-74/GA-1) (Parts No. 4-229-747-01) · Laser power meter LPM-8001 (Parts No. J-2501-046-A) or MD Laser power meter 8010S (Parts No. J-2501-145-A) · Oscilloscope (Measure after performing CAL of prove.) · Digital voltmeter · Thermometer · Jig for checking BD board waveform (Parts No. : J-2501-196-A) 5) When observing several signals on the oscilloscope, etc., make sure that VC and ground do not connect inside the oscilloscope. (VC and ground will become short-circuited.) 6) Using the above jig enables the waveform to be checked without the need to solder. (Refer to Servicing Note on page 6.) 7) As the disc used will affect the adjustment results, make sure that no dusts nor fingerprints are attached to it.
Parts to be replaced Adjustment 5-7. Initial setting of adjustment values 5-8. Recording of Iop information 5-9. TEMP ADJUST 5-10. Laser power adjustment 5-11. Iop NV Save 5-12. Traverse adjustment 5-13. Focus bias adjustment 5-16. Auto gain adjustment 5-6-4. AUTO CHECK Optical Pick-up IC101 IC102 IC151 IC190 IC195 D101
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MDS-JE470
5-5. USING THE 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. Rotate the l AMS L knob and display "CREC1 MODE". 3. Press the YES button again to display "CREC1 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 AEJECT button and remove the disc. The above has been how to create a continuous recorded data for the focus bias adjustment and error rate check. Note : · Be careful not to apply vibration during continuous recording.
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 button or M button to move the optical pick-up.) Connect the digital volt meter to CN105 pin 1 (I+3V) and CN105 pin 2 (IOP). 2. Then, rotate the l AMS L knob and display "LDPWR CHECK". 3. Press the YES button once and display "LD 0.9 mW $ ". Check that the reading of the laser power meter become the specified value. 4. Press the YES button once more and display " LD 7.0 mW $ ". Check that the reading the laser power meter and digital volt meter satisfy the specified value. Specified Value : Laser power meter reading : LD 0.9mW : 0.85-0.91mW (260B) 0.90-0.96mW (260E) LD 7.0mW : 6.80-7.20mW (260B) 7.00-7.50mW (260E) Digital voltmeter reading : Optical pick-up displayed value ± 10% (Optical pick-up label)
KMS
5-6. CHECKS PRIOR TO REPAIRS
These checks are performed before replacing parts according to "approximate specifications" to determine the faulty locations. For details, refer to "Checks Prior to Parts Replacement and Adjustments" (See page 9). 5-6-1. Temperature Compensation Offset Check When performing adjustments, set the internal temperature and room temperature to 22 to 28ºC. Checks cannot be performed properly if performed after some time from power ON due to the rise in the temperature of the IC and diode, etc. So, perform the checks again after waiting some time. Checking Procedure: 1. Rotate the l AMS L knob to display "TEMP CHECK". (C12) 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.) 5-6-2. Laser Power Check Before checking, check the Iop value of the optical pick-up. (Refer to 5-8. Recording and Displaying Iop Information.) Connection :
Laser power meter
260B 20101 H0576 R
(For details of the method for checking this value, refer to "5-8. Recording and Displaying Iop Information".)
Iop = 57.6 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
5. Press the MENU/NO button and display "LDPWR CHECK" and stop the laser emission. (The MENU/NO button is effective at all times to stop the laser emission.) Note 1: After step 4, each time the YES button is pressed, the display will be switched between "LD 0.7 mW $ ", "LD 6.2 mW $ ", and "LD Wp $ ". Nothing needs to be performed here. 5-6-3. Iop Compare The current Iop value at laser power 7 mw output and reference Iop value (set at shipment) written in the nonvolatile memory are compared, and the rate of increase/decrease will be displayed in percentage. Note: Perform this function with the optical pick-up set at room temperature. Procedure 1. Rotate the l AMS L knob to display "Iop Compare". 2. Press the YES button and start measurements. 3. When measurements complete, the display changes to "±xx%yy". xx is the percentage of increase/decrease, and OK or NG is displayed at yy to indicate whether the percentage of increase/ decrease is within the allowable range. 4. Press the MENU/NO button to end.
Optical pick-up objective lens
Digital volt meter
BD board CN105 pin 1 (I+3V) CN105 pin 2 (IOP)
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MDS-JE470
5-6-4. Auto Check This test mode performs C-REC and C-PLAY automatically for mainly checking the characteristics of the optical pick-up. To perform this test mode, the laser power must first be checked. Perform Auto Check after the laser power check and Iop compare. Procedure 1. Press the YES button. If "LDPWR minicheck" is displayed, it means that the laser power check has not been performed. In this case, perform the laser power check and Iop compare, and then repeat from step 1. 2. If a disc is in the mechanical deck, it will be ejected forcibly. "DISC IN" will be displayed in this case. Load a test disc (MDW74/GA-1) which can be recorded. 3. If a disk is loaded at step 2, the check will start automatically. 4. When "XX CHECK" is displayed, the item corresponding to XX will be performed. When "06 CHECK" completes, the disc loaded at step 2 will be ejected. "DISC IN" will be displayed. Load the check disc (MD) TDYS-1. 5. When the disc is loaded, the check will automatically be resumed from "07 CHECK". 6. After completing to test item 12, check OK or NG will be displayed. If all items are OK, "CHECK ALL OK" will be displayed. If any item is NG, it will be displayed as "NG:xxxx". When "CHECK ALL OK" is displayed, it means that the optical pick-up is normal. Check the operations of the other spindle motor, thread motor, etc. When displayed as "NG:xxxx", it means that the optical pick-up is faulty. In this case, replace the optical pick-up. 5-6-5. Other Checks All the following checks are performed by the Auto Check mode. They therefore need not be performed in normal operation. 1. Load a continuously recorded test disc (MDW-74/GA-1). (Refer to "5-5. Using the Continuously Recorded Disc".) 5-6-6. Traverse Check Connection :
Oscilloscope
6. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS 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 and display "EFB = MO-W". 8. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the l AMS L knob. (Write power traverse checking)
A VC B Specification A = B
(Traverse Waveform)
A VC B
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
9. Press the YES button display "EFB = MO-P". Then, the optical pick-up moves to the pit area automatically and servo is imposed. 10. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the l AMS L knob. (Traverse Waveform)
A
BD board CN105 pin 4 (TE) CN105 pin 6 (VC) V : 0.5 V/div H : 10 ms/div Input : DC mode
VC B
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
Checking Procedure: 1. Connect an oscilloscope to CN105 pin 4 (TE) and CN105 pin 6 (VC) of the BD board. 2. Load a test disc (MDW-74/GA-1). (Refer to Note 1.) 3. Press the M button and move the optical pick-up outside the pit. 4. Rotate the l AMS L knob and display "EF MO CHECK". 5. Press the YES button and display "EFB = MO-R". (Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON)
11. Press the YES button display "EF MO CHECK" The disc stops rotating automatically. 12. Press the A EJECT button and remove the disc. 13. Load the check disc (MD) TDYS-1. 14. Roteto the l AMS L knob and display "EF CD CHECK" (C04). 15. Press the YES button and display "EFB = CD". Servo is imposed automatically.
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MDS-JE470
16. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the l AMS L knob. (Traverse Waveform)
A VC B
5-6-8. C PLAY Check MO Error Rate Check Checking Procedure : 1. Load a continuously recorded test disc (MDW-74/GA-1). (Refer to "5-5. Using the Continuously Recorded Disc".) 2. Rotate the l AMS L knob and display "CPLAY1 MODE". 3. Press the YES button and display "CPLAY1 MID". 4. The display changes to "C = AD = ". 5. If the C error rate is below 20, check that ADER is 00. 6. Press the MENU/NO button, stop playback, press the A EJECT button, and test disc. CD Error Rate Check Checking Procedure : 1. Load a check disc (MD) TDYS-1. 2. Rotate the l AMS L knob and display "CPLAY1 MODE". 3. Press the YES button twice and display "CPLAY1 MID". 4. The display changes to "C1 = AD = ". 5. Check that the C1 error rate is below 20. 6. Press the MENU/NO button, stop playback, press the A EJECT button, and the test disc. 5-6-9. Self-Recording/playback Check Prepare a continuous recording disc using the unit to be repaired and check the error rate. Checking Procedure : 1. Insert a recordable test disc (MDW-74/GA-1) into the unit. 2. Rotate the l AMS L knob to display "CREC1 MODE". 3. Press the YES button to display the "CREC1 MID". 4. When recording starts, " REC " is displayed, this becomes "CREC 1 (@@@@)" (@@@@ is the address), and recording starts. 5. About 1 minute later, press the MENU/NO button to stop continuous recording. 6. Rotate the l AMS L knob to display "C PLAY1 MODE". 7. Press the YES button to display "C PLAY1 MID". AD = " will be displayed. 8. "C = 9. Check that the C error becomes below 20 and the AD error below 2. 10. Press the MENU/NO button to stop playback, and press the A EJECT button and remove the disc.
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
17. Press the YES button and display "EF CD CHECK". 18. Press the A EJECT button and remove the check disc (MD) TDYS-1. Note 1 : MO reading data will be erased during if a recorded disc is used in this adjustment. Note 2 : If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be seen more clearly.
Oscilloscope
BD board CN105 pin 4 (TE) CN105 pin 6 (VC)
330 k 10pF
5-6-7. Focus Bias Check Change the focus bias and check the focus tolerance amount. Checking Procedure : 1. Load a continuously recorded test disc (MDW-74/GA-1). (Refer to "5-5. Using the Continuously Recorded Disc".) 2. Rotate the l AMS L knob and display "CPLAY1 MODE". 3. Press the YES button and display "CPLAY1 MID". 4. Press the MENU/NO button when "C = AD = " is displayed. 5. Rotate the l AMS L knob and display "FBIAS CHECK". 6. Press the YES button and display " / c = ". The first four digits indicate the C error rate, the two digits after [/] indicate ADER, and the 2 digits after [c =] indicate the focus bias value. Check that the C error is below 20 and ADER is below 2. 7. Press the YES button and display " / b = ". Check that the C error is below 100 and ADER is below 2. 8. Press the YES button and display " / a = ". Check that the C error is below 100 and ADER is below 2. 9. Press the MENU/NO button, next press the A EJECT button, and remove the test disc.
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MDS-JE470
5-7. INITIAL SETTING OF ADJUSTMENT VALUE
Note: Mode which sets the adjustment results recorded in the non-volatile memory to the initial setting value. However the results of the temperature compensation offset adjustment will not change to the initial setting value. If initial setting is performed, perform all adjustments again excluding the temperature compensation offset adjustment. For details of the initial setting, refer to "5-4. Precautions on Adjustments" and execute the initial setting before the adjustment as required. Setting Procedure : 1. Rotate the l AMS L knob to display "ADJ CLEAR". 2. Press the YES button. "Complete!" will be displayed momentarily and initial setting will be executed, after which "ADJ CLEAR" will be displayed.
5-9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT
Save the temperature data at that time in the non-volatile memory as 25 °C reference data. Note : 1. Usually, do not perform this adjustment. 2. Perform this adjustment in an ambient temperature of 22 °C to 28 °C. Perform it immediately after the power is turned on when the internal temperature of the unit is the same as the ambient temperature of 22 °C to 28 °C. 3. When D101 has been replaced, perform this adjustment after the temperature of this part has become the ambient temperature. Adjusting Procedure : 1. Rotate the l AMS L knob and display "TEMP ADJUST". 2. Press the YES button and select the "TEMP ADJUST" mode. 3. "TEMP = [OK]" and the current temperature data will be displayed. 4. To save the data, press the 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 ADJUST" display then. When the MENU/NO button is pressed, "TEMP ADJUST" will be displayed immediatelly. Specified Value : The "TEMP = " should be within "E0 - EF", "F0 - FF", "00 0F", "10 - 1F" and "20 - 2F".
5-8. RECORDING AND DISPLAYING THE Iop INFORMATION
The IOP data can be recorded in the non-volatile memory. The Iop value on the label of the optical pick-up and the Iop value after the adjustment will be recorded. Recording these data eliminates the need to read the label on the optical pick-up. Recording Procedure : 1. While pressing the l AMS L knob and x button, connect the power plug to the outlet, and release the l AMS L knob and x button. 2. Rotate the l AMS L knob to display "[Service]", and press the YES button. 3. Rotate the l AMS L knob to display "Iop.Write", and press the YES button. 4. The display becomes Ref=@@@.@ (@ is an arbitrary number) and the numbers which can be changed will blink. 5. Input the Iop value written on the optical pick-up. To select the number : Rotate the l AMS L knob. To select the digit : Press the l AMS L knob 6. When the YES button is pressed, the display becomes "Measu=@@@.@" (@ is an arbitrary number). 7. As the adjustment results are recorded for the 6 value. Leave it as it is and press the YES button. 8. "Complete!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write". Display Procedure : 1. Rotate the l AMS L knob to display "Iop.Read". 2. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ indicates the Iop value labeled on the pick-up. ##.# indicates the Iop value after adjustment 3. To end, press the l AMS L button or MENU/NO button to display "Iop Read".
5-10. LASER POWER ADJUSTMENT
Check the Iop value of the optical pick-up before adjustments. (Refer to 5-8. Recording and Displaying Iop Information.) Connection :
Laser power meter
Optical pick-up objective lens Digital volt meter
BD board CN105 pin 1 (I+3V) CN105 pin 2 (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 button or M button to move the optical pick-up.) Connect the digital volt meter to CN105 pin 1 (I+3V) and CN105 pin 2 (IOP). 2. Rotate the l AMS L knob and display "LDPWR ADJUST". (Laser power : For adjustment) 3. Press the YES button once and display "LD 0.9 mW $ ". 4. Rotate the l AMS L knob so that the reading of the laser power meter becomes the specified value. 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 7.0 mW $ " will be displayed. 6. Rotate the l AMS L knob so that the reading of the laser power meter becomes the specified value, press the YES button and save it. Note : Do not perform the emission with 7.0 mW more than 15 seconds continuously.
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MDS-JE470
7. Then, rotate the l AMS L knob and display "LDPWR CHECK". 8. Press the YES button once and display "LD 0.9 mW $ ". Check that the reading of the laser power meter become the specified value. 9. Press the YES button once more and display "LD 7.0 mW $ ". Check that the reading the laser power meter and digital volt meter satisfy the specified value. Note down the digital voltmeter reading value. Specified Value : Laser power meter reading : LD 0.9mW : 0.85-0.91mW (260B) 0.90-0.96mW (260E) LD 7.0mW : 6.90-7.10mW (260B) 7.20-7.30mW (260E) Digital voltmeter reading : Optical pick-up displayed value ± 10% (Optical pick-up label)
KMS 260B 20101 H0576 R
5-12. TRAVERSE ADJUSTMENT
Connection :
Oscilloscope
BD board CN105 pin 4 (TE) CN105 pin 6 (VC) V : 0.5 V/div H : 10 ms/div Input : DC mode
(For details of the method for checking this value, refer to "5-8. Recording and Displaying IOP Information".)
Iop = 57.6 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
10. Press the MENU/NO button and display "LDPWR CHECK" and stop the laser emission. (The MENU/NO button is effective at all times to stop the laser emission.) 11. Rotate the l AMS L knob to display "Iop.Write". 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 the Iop value noted down at step 9. To select the number : Rotate the l AMS L knob. To select the digit : Press the l AMS L knob 14. When the YES button is pressed, "Complete!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write". Note 1: After step 4, each time the YES button is pressed, the display will be switched between "LD 0.7 mW $ ", "LD 6.2 mW $ ", and "LD Wp $ ". Nothing needs to be performed here. 5-11. Iop NV SAVE Write the reference values in the nonvolatile memory to perform "Iop compare". As this involves rewriting the reference values, do not perform this procedure except when adjusting the laser power during replacement of the OP and when replacing the IC102. Otherwise the OP check may deteriorate. Note: Perform this function with the optical pick-up set at room temperature.
Adjusting Procedure : 1. Connect an oscilloscope to CN105 pin 4 (TE) and CN105 pin 6 (VC) of the BD board. 2. Load a test disc (MDW-74/GA-1). (Refer to Note 1.) 3. Press the M button and move the optical pick-up outside the pit. 4. Rotate the l AMS L knob and display "EF MO ADJUST". 5. Press the YES button and display "EFB = MO-R". (Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON) 6. Rotate the l AMS L knob so that the waveform of the oscilloscope becomes the specified value. (When the l AMS L knob is rotated, the of "EFB= " changes and the waveform changes.) In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Read power traverse adjustment) (Traverse Waveform)
A VC B
Specification A = B
7. Press the YES button and save the result of adjustment to the non-volatile memory ("EFB = SAVE" will be displayed for a moment. Then "EFB = MO-W" will be displayed). 8. Rotate the l AMS L knob so that the waveform of the oscilloscope becomes the specified value. (When the l AMS L knob is rotated, the of "EFBMO-W" changes and the waveform changes.) In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Write power traverse adjustment) (Traverse Waveform)
A
Procedure 1. Rotate the l AMS L knob to display "Iop NV Save" (C06). 2. Press the YES button and display "Iop [stop]". 3. After the display changes to "Iop =xxsave?", press the YES button. 4. After "Complete!" is displayed momentarily, the display changes to "Iop 7.0 mW". 5. After the display changes to "Iop=yysave?", press the YES button. 6. When "Complete!" is displayed, it means that Iop NV saving has been completed.
VC B
Specification A = B
9. Press the YES button, and save the adjustment results in the SAVE" will be displayed for non-volatile memory. ("EFB = a moment.) 10. "EFB = MO-P". will be displayed. The optical pick-up moves to the pit area automatically and servo is imposed.
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M