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Service Manual
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MDS-PC3
SERVICE MANUAL
US Model Canadian Model AEP Model UK Model E Model
Photo: SILVER
US and foreign patents licensed form Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism MD Mechanism Type Optical Pick-up Type
MDS-JE640 MDM-7A KMS-260B/J1N
SPECIFICATIONS
System Disc Laser Laser output MiniDisc digital audio system MiniDisc Semiconductor laser ( = 780 nm) Emission duration: continuous 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. Material: GaAlAs 400 rpm to 900 rpm Advanced Cross Interleave Reed Solomon Code (ACIRC) 44.1 kHz Adaptive Transform Acoustic Coding (ATRAC) EFM (Eight-to-Fourteen Modulation) 2 stereo channels 5 to 20,000 Hz ±0.5 dB Over 94 dB during playback Below measurable limit
General
Where purchased U.S.A. and Canada Other countries Power requirements* 120 V AC, 60 Hz 220 230 V AC, 50/60 Hz
* Using an AC power adaptor (supplied) Power consumption Dimensions (approx.) 7W 152 × 52 × 255 mm (6 × 2 1/8 × 10 1/8 inches) (w/h/d) incl. projecting parts and controls 1.0 kg (2 lb 4 oz)
Laser diode Revolutions (CLV) Error correction Sampling frequency Coding Modulation system Number of channels Frequency response Signal-to-noise ratio Wow and flutter
Mass (approx.)
Supplied
accessories
· AC power adaptor (1) · Audio connecting cord (stereo mini-plug × 1 y stereo mini-plug × 1) (1) · Optical cable (1) · Remote commander (remote) RM-D52M (1) · PC connecting kit PCLK-MN10* (1)
* Required for operation by personal computer. For details, refer to the operating instructions supplied with the PCLK-MN10.
Inputs
LINE (ANALOG) IN Jack type: stereo-mini Impedance: 47 kilohms Rated input: 500 mVrms Minimum input: 125 mVrms DIGITAL (OPTICAL) IN Connector type: square optical Impedance: 660 nm (optical wave length)
Outputs
LINE (ANALOG) OUT (VARIABLE) Jack type: stereo-mini Rated output: 1 Vrms (at 50 kilohms) Load impedance: Over 10 kilohms DIGITAL (OPTICAL) OUT Connector type: square optical Rated output: 18 dBm Impedance: 660 nm (optical wave length) PHONES Jack type: stereo-mini Rated output: 5 mW Load impedance: 32 ohms
MINIDISC DECK
*Note: As this unit has only a few buttons, one button is assigned with several functions in the test mode." Press the z button, AMS knob to switch the functions. · Each time the z button is pressed, the display switches in the follwing order, "PGM" t "blank" t "PGM" t . · Rotate the AMS knob and the display switches in the following order, "blank" t "TOC" t "EDIT" t "TOC EDIT" t "[ ]" t "[TOC ]" t "[ EDIT]" t "[TOC EDIT]" t "blank" t . For simplicity, operations of z button will not be discribed here. Example) x/Z : Lights-out "PGM" and press the x/Z button. x/Z "PGM" : Display "PGM" and press the x/Z button. The functions of each button change with the display. Bottons and Corresponding Functions
"PGM" Lights-out "PGM" Buttons displayed Nothing displayed ENTER (YES) MENU (EDIT)/ NO TOC REPEAT STOP EDIT PLAY REC LCD displayed TOC EDIT CLEAR -- FF FR TOC PLAY MODE SCROLL EDIT DISPLAY TIME TOC EDIT -- --
@/1 x/Z
@/1
EJECT
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-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-digit code/Message C11/Protected C12/Cannot Copy Cause/Remedy The inserted MD is record-protected. , Take out the MD and close the record-protect slot (page 13). An attempt was made to play a disc that is not compatible with this deck (MD data disc, etc.). , Replace the disc. 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. C13/Read Error The deck could not read the TOC on the MD properly. , Take out the MD and insert it again. C41/Cannot Copy C71/Din Unlock C14/Toc Error The deck could not read the TOC on the MD properly. , Insert another disc. , If possible, erase all the tracks on the MD (page 29). The digitally dubbed material cannot be recorded digitally (page 11). The sporadic appearance of this message is caused by the digital signal being recorded. This will not affect the recording. While recording from a digital component connected through the DIGITAL (OPTICAL) IN connector, the digital connecting cable was unplugged or the digital component turned off. , Connect the cable or turn the digital component back on. E0001/MEMORY NG E0101/LASER NG There is an error in the internal data that the deck needs in order to operate. , Consult your nearest Sony dealer.
C13/Rec Error
There is a problem with the optical pickup. , Consult your nearest Sony dealer.
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 x/Z button to exit the mode.
2
1. While pressing the AMS knob and x/Z button, connect the power plug to the outlet, and release the AMS knob and x/Z button. When the test mode is set, "[Check]" will be displayed. 2. Rotate the AMS knob and when "[Service]" is displayed, press the @/1 button. 3. Rotate the AMS knob and display "Err Display". 4. Pressing the @/1 button sets the error history mode and displays "op rec tm". 5. Select the contents to be displayed or executed using the AMS knob. 6. Pressing the AMS knob will display or execute the contents selected. 7. Pressing the AMS knob another time returns to step 4. 8. Pressing the x/Z button displays "Err Display" and exits the error history mode. 9. To exit the test mode, remove the power plug to the outlet.
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 AMS 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 AMS knob. Mode for erasing the error and retry address histories Procedure 1. Press the AMS knob when displayed as "er refresh". 2. Press the @/1 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 AMS knob when displayed as "tm refresh". 2. Press the @/1 button when the display changes to "tm refresh?". When "complete!" is displayed, it means erasure has completed. 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 AMS knob when displayed as "op change". 2. Press the @/1 button when the display changes to "op change?". When "Complete!" is displayed, it means erasure has completed. 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 AMS knob when displayed as "spdl change" 2. Press the @/1 button when the display changes to "spdl change?" 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 refresh
op change
spdl change
3
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 ........................................................................ 11 3. DISASSEMBLY
3-1. Case (U) .............................................................................. 14 3-2. MD Mechanism Deck (MDM-74) ...................................... 14 3-3. Main Board ......................................................................... 15 3-4. Over Light Head (HR901), BD (MD) Board ...................... 15 3-5. Holder Assy ......................................................................... 16 3-6. Loading Motor Assy (M103) .............................................. 16 3-7. Sled Motor Assy (M102), Slider ......................................... 17 3-8. Optical Pick-up (MD) (KMS-260B/JIN) ............................ 17 3-9. Spindle Motor Assy (M101) ............................................... 18
4. TEST MODE ..................................................................... 19 5. ELECTRICAL ADJUSTMENTS ............................... 24 6. DIAGRAMS
6-1. Block Diagrams · BD Section ....................................................................... 36 · Main Section .................................................................... 37 6-2. Printed Wiring Board BD Section ................................. 38 6-3. Schematic Diagram BD Section (1/2) ........................... 39 6-4. Schematic Diagram BD Section (2/2) ........................... 40 6-5. Printed Wiring Board Main Section .............................. 41 6-6. Schematic Diagram Main Section (1/2) ........................ 42 6-7. Schematic Diagram Main Section (2/2) ........................ 43 6-8. Printed Wiring Board Panel Section ........................... 44 6-9. Schematic Diagram Panel Section ............................... 45 6-10. IC Block Diagrams ........................................................... 46 6-11. IC Pin Functions ............................................................... 49
7. EXPLODED VIEWS
7-1. Chassis Section ................................................................... 54 7-2. Mechanism Section-1 (MDM-7A) ...................................... 55 7-3. Mechanism Section-2 (MDM-7A) ...................................... 56
8. ELECTRICAL PARTS LIST ........................................ 57
4
SECTION 1 SERVICE NOTES
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. Lead free soldering MAIN and PANEL boards of this product are lead free soldered (contains no lead). Lead-free solder have the following characteristics. · The melting point is about 40 ºC higher than conventional solder. Conventional soldering iron can be used, but must be pressed for a longer time. When using the soldering iron with a temperature adjustment function, set to about 350 ºC. Note: Pressing the soldering iron too long may cause the board pattern (copper coating) to peel off. · Strong viscosity As it has stronger viscosity than conventional solder, make sure the IC terminal does not solder bridge. · Can be used with conventional solder Though it is best to add lead-free solder only, conventional solder can also be added. · Boards using lead-free solder are printed with the LF mark meaning "Lead Free". SAFETY CHECK-OUT After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, "metallized" knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers' instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The "limit" indication is 0.75 V, so analog meters must have an accurate 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 2 V AC range are suitable. (See Fig. A)
To Exposed Metal Parts on Set
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.
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 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
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
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 AMS knob and x/Z button, connect the power plug to the outlet, and release the AMS knob and x/Z button. 2. Rotate the AMS knob to display "[Service]", and press the @/1 button. 3. Rotate the AMS knob to display "Iop Write" (C05), and press the @/1 button. 4. The display becomes "Ref=@@@.@" (@ is an arbitrary number) and the numbers which can be changed will blink. 5. Input the Iop value written on the optical pick-up. To select the number : Rotate the AMS knob. To select the digit : Press the AMS knob. 6. When the @/1 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 @/1 button. 8. "Complete! !" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write" (C05). 9. Press the x/Z button to complete, remove the power plug to the outlet. Display Precedure: 1. While pressing the AMS knob and x/Z button, connect the power plug to the outlet, and release the AMS knob and x/Z button. 2. Rotate the AMS knob to display "[Service]", and press the @/1 button. 3. Rotate the AMS knob to display "Iop Read" (C26), and press the @/1 button. 4. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ : indicates the Iop value labeled on the pick-up. ##.# : indicates the Iop value after adjustment 5. To end, press the AMS button or x/Z button to display "Iop Read" (C26), remove the power plug to the outlet.
7
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 27) · 5-6-3. Iop Compare (see page 27) · 5-6-4. Auto Check (see page 28) 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 CN420, and then attach it again. [MAIN BOARD] (Component Side)
CN420
8
RETRY CAUSE DISPLAY MODE
· In this test mode, the causes for retry of the unit during recording can be displayed on the indication vessel. 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. Press the @/1 button, x/Z button and u button continuously for about 10 seconds. 2. Rotate the AMS knob to display "Debug Disp", Then press the AMS button. 3. When the mode is set, "RTs 00c 00e 00" is displayed. 4. Press the z button to start recording. Then press the X button and start recording. 5. To check the "track mode", press the H button to start play. 6. To exit the test mode, press the @/1 button, and turn OFF the power. If the test mode cannot be exited, refer to "Forced Reset" on page 8.
Fig. 1 Reading the Test Mode Display (During recording and stop)
RTs@@c##c** Indication vessel display @@ : Cause of retry ## : Number of retries ** : Number of retry errors
Fig. 2 Reading the Test Mode Display (During playback)
@@###**$$ Indication vessel display @@ ### ** $$ : : : : Parts No. (name of area named on TOC) Cluster } Address (Physical address on disc) Sector Track mode (Track information such as copyright information of each part)
Reading the Retry Cause Display Higher Bits Hexadecimal 8 Bit Binary 0 0 0 0 0 0 0 1 4 0 0 0 0 0 0 1 0 2 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 Lower Bits 8 0 0 0 1 0 0 0 0 4 0 0 1 0 0 0 0 0 2 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0
Hexadecimal 01 02 04 08 10 20 40 80
Cause of Retry shock ader5
Occurring conditions When track jump (shock) is detected When ADER was counted more than five times continuously When DIN unlock is detected When not in focus When ABCD signal level exceeds the specified range When CLV is unlocked When access operation is not performed normally
b7 b6 b5 b4 b3 b2 b1 b0
Discontinuous address When ADIP address is not continuous DIN unlock FCS incorrect IVR rec error CLV unlock Access fault
Reading the Display: Convert the hexadecimal display into binary display. If more than two causes, they will be added. Example When 42 is displayed: Higher bit : 4 = 0100 t b6 Lower bit : 2 = 0010 t b1 In this case, the retry cause is combined of "CLV unlock" and "ader5". When A2 is displayed: Higher bit : A = 1010 t b7+b5 Lower bit : 2 = 0010 t b1 The retry cause in this case is combined of "Access fault", "IVR rec error", and "ader5".
9
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 = 0000 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
Clearing the Retry Record: Method: 1. Press the @/1 button, x/Z button, and u button for about 10 seconds. 2. Rotate the [AMS] knob to display "Retry Clear?" and press the [AMS] knob. 3. Press the [AMS] knob to clear the record and exit the clear mode.
10
9 AyB button (23)
Press to select Repeat A-B Play.
Location and Function of Parts
Remote Parts Description
Front Panel Parts Description
It also tells you about the information that appears in the display window.
0 REPEAT button (23)
Press to play tracks repeatedly.
qa NAME EDIT/SELECT button (37)
qh qg
1 2 3 4 5
Press to add the name or change the name of a track or MD.
This chapter tells you about the location and function of the various buttons and controls on the front panel and the supplied remote. Further details are provided on the pages indicated in the parentheses.
EJECT
INPUT
REC MODE
`/1
1
qs MENU/NO button (15, 25, 28)
Press to display "Edit Menu" or "Setup Menu."
PLAY MODE
N
X
x
2
qd N button (13, 21)
6
DISPLAY
Press to start play or recording.
qd
?/1 z
.
>
z
X button (13, 21)
FADER MUSIC SYNC
. > x/Z
m
M
Press to pause play or recording. Press again to resume play or recording.
qs
R
MENU/NO NAME EDIT/
YES
3 4 5
x button (13, 21, 29)
SELECT
+
PUSHu
Location and Function of Parts
qa
7
REPEAT
AyB
CLEAR
LEVEL
6
Press to stop play, recording, or cancel the selected operation.
./> buttons (13, 21, 22, 25, 28)
R
Press to locate tracks, select a menu item, or select a character to be input.
z button (13, 17, 18)
q; 98 7
Press to record on the MD, monitor the input signal, or mark track numbers.
1 ?/1 (power) switch (12, 21)
m/M buttons (22, 26, 36)
1 ?/1 (power) switch (12, 21)
5 x/Z button (13, 21, 29)
Press to stop play, stop recording, or cancel the selected operation. Press to eject the MD while the deck is stopped.
SECTION 2 GENERAL
Press to locate a portion within a track, change the contents of a program, or shift the cursor.
Press to turn the deck on. When you turn the deck on, the ?/1 switch indicator on the deck turns off. When you press the switch again, the deck turns off and the indicator lights up red.
qf EJECT Z button (13, 21)
2 PLAY MODE button (24, 25)
Press to eject the MD.
Press to turn the deck on. When you turn the deck on, the switch indicator turns off. When you press the switch again, the deck turns off and the indicator lights up red.
6 ./> control, u button (13, 21,
Press to record on the MD, monitor the input signal, or mark track numbers.
Press to select Shuffle Play or Program Play.
qg INPUT button (12)
2 z button (13, 17, 18)
22, 25, 28)
3 DISPLAY button (6, 16, 25, 35)
Press to select the input jack (or connector) of the program source to be recorded.
3 MD insertion slot
Insert the MD as illustrated below.
qh REC MODE button (15)
Turn to locate tracks. Press to start play, pause play, or pause recording. Press to carry out the selected operation.
7 Remote sensor
With the labeled side up Point the remote towards this window ( remote operations. ) for
Press to select the information to be displayed in the window, or to select the type of characters to be input.
4 MUSIC SYNC button (20)
Press to start Music Synchro-recording.
5 FADER button (42)
Press to select one of the following four recording modes: Mono (monaural recording), stereo (stereo recording), LP2 (2 times normal recording time), and LP4 (4 times normal recording time).
Press to perform Fade-in Recording/Playback or Fade-out Recording/Playback.
6 LEVEL +/ buttons (14, 21)
With the arrow pointing towards the deck
4 Display window (6, 7)
Shows various information.
Press to adjust the recording level and the output level of the PHONES jack and ANALOG OUT jacks.
7 YES button (15, 25, 28)
Press to carry out the selected operation.
This section is extracted from instruction manual.
8 CLEAR button (26, 36)
11
Press to cancel the selection.
5
4
12
While the deck is recording
While the deck is playing
Press DISPLAY repeatedly to change the display.
Press DISPLAY repeatedly to change the display.
Using the Display
Press DISPLAY repeatedly to change the display. Each press of the button changes the display as follows:
Total number of tracks and total recorded time (default display)
While the deck is stopped
Each press of the button changes the display as follows:
?/1 Z N X
>
Each press of the button changes the display as follows:
The display window shows information about the MD or track. This section describes the information that appears for each deck status.
Track number and recorded time of the current track (default display)
x z
Track number and elapsed time of the current track (default display)
1 5 Tr 4 4 . 2 2
Press
.
1 Tr 0 . 1 2
DISPLAY
1 4 Tr 4 4 . 2 2
Press
Press
m M
Remaining recordable time on the MD
Track number and remaining time of the current track
+
R
Remaining recordable time on the MD (recordable MDs only)*
-63.02
Press
1 Tr - 2 . 5 1
Note
-63.51
Press
Location and Function of Parts
Press
Level of the input signal
Remaining recordable time on the MD
Order of the programmed tracks**
-45.25
Press
12t4t61
Press The number and total playing time of the programmed tracks**
Press
Track name
Order of the programmed tracks*
SONGS
Press
The type of information (e.g., total number of tracks, recorded time, remaining time, track or disc name) which was last displayed will continue to appear until you change it by pressing DISPLAY, even if you change the deck operation status. For example, if the remaining time was displayed when you stop the deck, the remaining time will continue to appear when you begin playing the same MD again or a different one.
12t4t61
When you insert an MD
3 Tr 1 2 . 5 6
Press
Press
The display automatically changes as follows:
Disc name
Press
Track name
Disc name
Track2
SONGS
Total number Total recorded of tracks time
SONGS
Press * Not shown for the premastered discs. ** This display appears only when "PGM" appears.
* The display appears only when "PGM" appears.
1 4 Tr 4 4 . 2 2
7
6
Hooking Up
The MD deck is capable of recording from both analog and digital sources.
Connecting the MD deck with an audio component
The MD deck can be connected to PCs with PC LINK capability (such as the VAIO-series of PCs), peripheral devices such as portable CD players, and active speakers. Make sure all devices are turned off before you hook them up.
When recording from an analog source
Required connecting
Audio connecting cord (supplied)
CD player or digital CS tuner, etc. with optical digital connection capability Portable CD player, etc. MDS-PC3
ANALOG
(VARIABLE)
cord
Getting Started
Portable CD player, etc.
LINE
OUT
LINE OUT
IN OUT
OPTICAL OUT
For PC connecting kit PCLK-MN10
DIGITAL
!
ANALOG PHONES
(VARIABLE)
PC LINK
IN
DC IN 9V
OUT
IN OUT (OPTICAL)
l : Signal flow
When recording from a digital source
LINE IN OPTICAL IN
Required connecting
Optical digital cable (supplied)
Active speakers, etc. Amplifier, etc. with optical digital connection capability
For AC power adaptor
cord
l : Signal flow
MDS-PC3
DIGITAL
CD player, etc. with optical digital connection capability
OPTICAL
IN OUT (OPTICAL)
Connecting the MD deck to a personal computer
OUT
l : Signal flow
Use the PCLK-MN10 PC connecting kit (supplied) to connect the PC to the MD deck through the PC LINK jack on the back of the MD deck. By connecting the MD deck to a PC, you will be able to select and play MD tracks and do various editing operations on the PC screen. For more details, refer to the manual supplied with the PC connecting kit.
continued
9
13
SECTION 3 DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. CASE (U)
4 case (U)
2 3
claws
1 three screws (BVTP 3x10) 1 three screws (BVTP 3x10)
3-2. MD MECHANISM DECK (MDM-7A)
1 flat type wire (23 core) (CN102) 2 two screws (+BVTTWH M3 3x10)
2 two screws (+BVTTWH M3 3x10)
1 flat type wire (27 core) (CN101) 3 mechanism deck
14
3-3. MAIN BOARD
2 two screws (BVTP 3x8)
1 flat type wire (13 core) (CN103) 4 MAIN board
3 three screws (BVTP 3x8)
3-4. OVER LIGHT HEAD (HR901), BD (MD) BOARD
2 screw (P 1.7x6)
3 head, over light (HR901)
4 Removal the solders
8 BD (MD) board 6 1 connector (CN104)
4 Removal the solders 5 two screws (BTP 2x6)
7 FLEXIBLE board (CN101)
15
3-5. HOLDER ASSY
3 6 holder assy
2 claw
5
4 boss
4 boss 1 spring (holder), tension
3-6. LOADING MOTOR ASSY (M103)
1 belt (loading)
2 two screws (PWH 1.7x2.5)
3 motor assy, loading (M103)
16
3-7. SLED MOTOR ASSY (M102), SLIDER
3 4 slider (EJ) Remeve the claw. Shift the slider in the arrow A direction. 5 A 6 slider 8 lever (head)
2 guide (L) 1 two screws (BTP 2x6)
7 lever (CHG)
9 two screws (PWH 1.7x2.5)
0 motor assy, sled (M102)
3-8. OPTICAL PICK-UP (MD) (KMS-260B/JIN)
qa optical pick-up (KMS-260B/J1N)
1 FLEXBLE boaed
7 MAIN shaft
0 slider (SL) 9 screw (P 1.7x6) 6 two screws (K 2x6)
8
4 screw (BTP 2x6)
5 base (BU-A)
3 gear (SD) 2 screw (M 1.7), tapping
17
3-9. SPINDLE MOTOR ASSY (M101)
2 motor assy, spindle (M101)
1 screw (M 1.7), tapping
18
SECTION 4 TEST MODE
*Note: As this unit has only a few buttons, one button is assigned with several functions in the test mode." Press the z button, AMS knob to switch the functions. · Each time the z button is pressed, the display switches in the follwing order, "PGM" t "blank" t "PGM" t . · Rotate the AMS knob and the display switches in the following order, "blank" t "TOC" t "EDIT" t "TOC EDIT" t "[ ]" t "[TOC ]" t "[ EDIT]" t "[TOC EDIT]" t "blank" t . For simplicity, operations of z button will not be discribed here. Example) x/Z : Lights-out "PGM" and press the x/Z button. x/Z "PGM" : Display "PGM" and press the x/Z button. The functions of each button change with the display. Bottons and Corresponding Functions
"PGM" Lights-out "PGM" Buttons displayed Nothing displayed ENTER (YES) MENU (EDIT)/ NO TOC REPEAT STOP EDIT PLAY REC LCD displayed TOC EDIT CLEAR -- FF FR TOC PLAY MODE SCROLL EDIT DISPLAY TIME TOC EDIT -- --
@/1 x/Z
@/1
EJECT
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. 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 button.
4-2. SETTING THE TEST MODE
The following are two methods of entering the test mode. While pressing the AMS knob and x/Z button, connect the power plug to an outlet, and release the AMS knob and x/Z button. When the test mode is set, "[Check]" will be displayed. Rotating the AMS knob switches between the following three groups; ··· y Check y Service y Develop y ···. 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 x/Z button immediately to exit the [Develop] group.
4-3. EXITING THE TEST MODE
Press the x/Z button, remove the power plug to the outlet.
4-4. BASIC OPERATIONS OF THE TEST MODE
All operations are performed using the AMS knob, @/1 button, and x/Z button. The functions of these buttons are as follows.
Function name &/1 button x/Z button AMS knob Left or Right Push u Function Cancel or move to top hierarchy Set Select Set submenu
19
4-5. SELECTING THE TEST MODE
There are 26 types of test modes as shown below. The groups can be switched by rotating the AMS knob. After selecting the group to be used, press the @/1 button. After setting a certain group, rotating the AMS 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 x/Z button immediately to exit the [Develop] group.
Group Display AUTO CHECK Err Display TEMP ADJUST LDPWR ADJUST Iop Write Iop NV Save EF MO ADJUST EF CD ADJUST FBIAS ADJUST 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 x/Z 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 x/Z button to exit the mode immediately.
20
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 AMS knob and display "CPLAY1MODE"(C34). 3 Press the @/1 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 @/1 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 x/Z button. The display will change to "CPLAY1MODE"(C34). 2 Press the x/Z"PGM" 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 AMS knob and display "CREC 1MODE" (C35). 3 Press the @/1 button to change the display to "CREC1 MID". 4 When access completes, the display changes to "CREC1 ( )" and REC lights up. Note : The numbers " " displayed shows you the recording position addresses. 2. Changing the parts to be recorded 1 When the @/1 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 "CREC1 ( Note : The numbers " " displayed shows you the recording position addresses. 3. Ending the continuous recording mode 1 Press the x/Z button. The display changes to "CREC 1MODE" (C35 ) and REC goes off. 2 Press the x/Z"PGM" 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 x/Z 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.
21
4-6. FUNCTIONS OF OTHER BUTTONS
Function PLAY STOP FF FR SCROLL PLAYMODE DISPLAY x/Z "PGM" x/Z REPEAT REC CLEAR TIME Contents Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking servo turns ON/OFF. Stops continuous playback and continuous recording. The sled moves to the outer circumference only when this is pressed. The sled moves to the inner circumference only when this is pressed. Switches between the pit and groove modes when pressed. Switches the spindle servo mode (CLV S y CLV A). Switches the displayed contents each time the button is pressed. Ejects the disc. Exits the test mode. Resets the software. Switches between recording start and stop if all servos are ON Differentiates the disc type (High reflective aluminum: CD/low reflection: MD) Switches between the error rate and motor modes
4-7. TEST MODE DISPLAYS
Each time the DISPLAY 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" (C03), "CPLAY1MODE" (C34), etc. 2. Error rate display Displays the error rate in the following way. C= AD = C = Indicates the C1 error. AD = Indicates ADER. 3. Address display The address is displayed as follows. (MO:recordable disc, CD:playback only disc) Pressed the SCROLL button, 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)
22
4-8. MEANINGS OF OTHER DISPLAYS
Contents Display B X REC z LP L.SYNC ATT B A4 2 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 @/1 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" (C31), press the @/1 button. 2. The software version will be displayed. 3. Press the x/Z button to end this mode.
23
SECTION 5 ELECTRICAL ADJUSTMENTS
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 27) OK
NG
5-6-3. Iop Compare (See page 27) OK
NG
5-6-4. Auto Check (See page 28) OK
NG
Replace optical pick-up or MDM-7A
Other faults are suspected. Check the threading mechanism, etc.
24
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 23)
Replace OP or IO195 NO
YES
5-7. INITIAL SETTING OF ADJUSTMENT VALUE (See page 30)
Replace IC101, IC195, or D101 NO
YES
5-9. TEMPERATURE COMPENSATION OFFSET ADJUSTMENT (See page 30)
Replace OP, IC190, or IC195 NO
YES
5-10. LASER POWER ADJUSTMENT (See page 30)
Replace OP, IC102, IC190, or IC195 NO
YES
5-11. Iop NV SAVE (See page 31)
Replace OP, IC101, IC151, or IC195 NO
YES
5-12. TRAVERSE ADJUSTMENT (See page 31) 5-13. FOCUS BIAS ADJUSTMENT (See page 32) 5-16. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT (See page 33)
Replace OP NO
YES
OP change in Err Display mode Iop write
Replace the spindle motor NO 5-6-4. Auto Check (See page 28)
YES
Spdl change in Err Display mode
End adjustments
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 PICKUP (KMS-260B)
As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when using it. Before disconnecting the connector, desolder first. Before connecting the connector, be careful not to remove the solder. Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.
pick-up flexible board
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 COMPENSATION OFF SET 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
26
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 AMS knob and display "CREC 1MODE" (C35). 3. Press the @/1 button again to display "CREC1 MID". Display "CREC (0300)" and start to recording. 4. Complete recording within 5 minutes. 5. Press the x/Z button and stop recording . 6. Press the x/Z"PGM" 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. Connect the digital volt meter to CN105 pin 1 (I+3V) and CN105 pin 2 (Iop). 2. Then, rotate the AMS knob and display "LDPWR CHECK" (C13). 3. Press the @/1 button once and display "LD 0.9 mW $ ". Check that the reading of the laser power meter become 0.84 to 0.92 mW. 4. Press the @/1 button once more and display " LD 7.0 mW $ ". Check that the reading the laser power meter and digital volt meter satisfy the specified value. Specified Value : Laser power meter reading : 7.0 ± 0.2 mW Digital voltmeter reading : Optical pick-up displayed value ± 10%
(For details of the method for checking this value, refer to "5-8. Recording and Displaying Iop Information".)
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 8). 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 AMS knob to display "TEMP CHECK" (C12). 2. Press the @/1 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 Iop value of the optical pick-up. (Refer to 5-8. Recording and Displaying Iop Information.) Connection :
Laser power meter
KMS
260B 20101 H0576 R
Iop = 57.6 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
(Optical pick-up label) 5. Press the x/Z button and display "LDPWR CHECK" (C13) and stop the laser emission. (The x/Z button is effective at all times to stop the laser emission.) Note 1: After step 4, each time the @/1 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 AMS knob to display "Iop Compare" (C27). 2. Press the @/1 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 x/Z button to end.
optical pick-up objective lens
Digital volt meter
BD board CN105 pin 1 (I+3V) CN105 pin 2 (Iop)
27
5-6-4. Auto Check 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 compare. Procedure 1. Press the @/1 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. 5-6-6. Traverse Check 5-6-7. Focus Bias Check 5-6-8. C PLAY Check 5-6-9. Self-Recording/Playback Check 5-6-6. Traverse Check Connection :
5. 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)
6. Press the @/1 button and display "EFB = MO-W". 7. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS knob. (Write power traverse checking) (Traverse Waveform)
A VC B
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
8. Press the @/1 button display "EFB = MO-P". Then, the optical pick-up moves to the pit area automatically and servo is imposed. 9. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS knob. (Traverse Waveform)
Oscilloscope
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. Rotate the AMS knob and display "EF MO CHECK" (C14). 4. Press the @/1 button and display "EFB = MO-R". (Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON)
10. Press the @/1 button display "EF MO CHECK" (C14) The disc stops rotating automatically. 11. Press the x/Z "PGM" button and remove the disc. 12. Load the check disc (MD) TDYS-1. 13. Roteto the AMS knob and display "EF CD CHECK" (C15). CD". Servo is 14. Press the @/1 button and display "EFB = imposed automatically.
28
15. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS 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 AMS knob and display "CPLAY1MODE" (C34). 3. Press the @/1 button and display "CPLAY1 MID". 4. The display changes to "C = AD = )". 5. If the C1 error rate is below 20, check that ADER is 00. 6. Press the x/Z button, stop playback, press the x/Z "PGM" button, and test disc. CD Error Rate Check Checking Procedure : 1. Load a check disc (MD) TDYS-1. 2. Rotate the AMS knob and display "CPLAY1MODE" (C34). 3. Press the @/1 button twice and display "CPLAY1 MID". 4. The display changes to "C = AD = )". 5. Check that the C1 error rate is below 20. 6. Press the x/Z button, stop playback, press the x/Z "PGM" 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 AMS knob to display "CREC 1MODE" (C35). 3. Press the @/1 button to display the "CREC1 MID". 4. When recording starts, " REC " is displayed, this becomes "CREC1 (@@@@)" (@@@@ is the address), and recording starts. 5. About 1 minute later, press the x/Z button to stop continuous recording. 6. Rotate the AMS knob to display "CPLAY 1MODE" (C34). 7. Press the @/1 button to display "CPLAY1 MID". AD = )" will be displayed. 8. "C = 9. Check that the C1 error becomes below 20 and the AD error below 2. 10. Press the x/Z button to stop playback, and press the x/Z "PGM" button and remove the disc.
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
16. Press the @/1 button and display "EF CD CHECK" (C15). 17. Press the x/Z "PGM" 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 AMS knob and display "CPLAY1MODE" (C34). 3. Press the @/1 button and display "CPLAY1 MID". 4. Press the x/Z button when "C = AD = )" is displayed. 5. Rotate the AMS knob and display "FBIAS CHECK" (C16). 6. Press the @/1 button and display " / c = )". The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [c =] indicate the focus bias value. Check that the C1 error is below 20 and ADER is below 2. 7. Press the @/1 button and display " / b = )". Check that the C1 error is below 100 and ADER is below 2. 8. Press the @/1 button and display " / a = )". Check that the C1 error is below 100 and ADER is below 2. 9. Press the x/Z button, next press the A button, and remove the test disc.
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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 for Adjustments" and execute the initial setting before the adjustment as required. Setting Procedure : 1. Rotate the AMS knob to display "ADJ CLEAR" (C28). 2. Press the @/1 button. "Complete!" will be displayed momentarily and initial setting will be executed, after which "ADJ CLEAR" (C28) 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 AMS knob and display "TEMP ADJUST" (C03). 2. Press the @/1 button and select the "TEMP ADJUST" (C03) mode. 3. "TEMP = [OK]" and the current temperature data will be displayed. 4. To save the data, press the @/1 button. When not saving the data, press the x/Z button. 5. When the @/1 button is pressed, "TEMP = SAVE" will be displayed and turned back to "TEMP ADJUST" (C03) display then. When the x/Z button is pressed, "TEMP ADJUST" (C03) 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 Iop INFORMATION
The Iop (C28) data can be recorded in the non-volatile memory. Iop value on the label of the optical pick-up and 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 AMS knob and x/Z button, connect the power plug to the outlet, and release the AMS knob and x/Z button. 2. Rotate the AMS knob to display "[Service]", and press the @/1 button. 3. Rotate the AMS knob to display "Iop Write" (C05), and press the @/1 button. 4. The display becomes Ref=@@@.@ (@ is an arbitrary number) and the numbers which can be changed will blink. 5. Input Iop value written on the optical pick-up. To select the number : Rotate the AMS knob. To select the digit : Press the AMS knob 6. When the @/1 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 @/1 button. 8. "Complete! !" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write" (C05). Display Procedure : 1. Rotate the AMS knob to display "Iop Read" (C26). 2. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ indicates Iop value labeled on the pick-up. ##.# indicates Iop value after adjustment 3. To end, press the x/Z button to display "Iop Read" (C26).
5-10. LASER POWER ADJUSTMENT
Check 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. Connect the digital volt meter to CN105 pin 1 (I+3V) and CN105 pin 2 (Iop). 2. Rotate the AMS knob and display "LDPWR ADJUST" (C13). (Laser power : For adjustment) 3. Press the @/1 button once and display "LD 0.9 mW $ ". 4. Rotate the AMS knob so that the reading of the laser power meter becomes 0.85 to 0.91 mW. Press the @/1 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 AMS knob so that the reading of the laser power meter becomes 6.9 to 7.1 mW, press the @/1 button and save it. Note : Do not perform the emission with 7.0 mW more than 15 seconds continuously.
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7. Then, rotate the AMS knob and display "LDPWR CHECK" (C13). 8. Press the @/1 button once and display "LD 0.9 mW $ ". Check that the reading of the laser power meter become 0.85 to 0.91 mW. 9. Press the @/1 button once more and display "LD 7.0 mW $ ". Check that the reading the laser power meter and digital volt meter satisfy the specified value. Note down the digital voltmeter reading value. Specified Value : Laser power meter reading : 7.0 ± 0.2 mW Digital voltmeter reading : Optical pick-up displayed value ± 10%
(For details of the method for checking this value, refer to "5-8. Recording and Displaying Iop Information".)
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
KMS
260B 20101 H0576 R
Iop = 57.6 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
(Optical pick-up label) 10. Press the x/Z button and display "LDPWR CHECK" (C13) and stop the laser emission. (The x/Z button is effective at all times to stop the laser emission.) 11. Rotate the AMS knob to display "Iop Write" (C05). 12. Press the @/1 button. When the display becomes Ref=@@@.@ (@ is an arbitrary number), press the @/1 button to display "Measu=@@@.@" (@ is an arbitrary number). 13. The numbers which can be change