Sony MDS-JA30ES - Mini Disc Recorder User manual

US Model
Canadian Model
AEP Model
UK Model
SERVICE MANUAL
MINIDISC DECK
MICROFILM
Model Name Using Similar Mechanism MDS-JA50ES
MD Mechanism Type MDM-4B
Base Unit Type MBU-2B
Optical Pick-up Type KMS-210A/J-N
MDS-JA30ES
SPECIFICATIONS
— Continued on next page —
U.S. and foreign patents licensed from Dolby Laboratories
Licensing Corporation.
Photo: GOLD

— 2 —
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINEWITH
MARK !ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE !SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Checktheantenna terminals,metaltrim,“metallized” knobs,screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part having
a return to chassis, must not exceed 0.5 mA (500 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-operatedAC 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)
SAFETY CHECK-OUT
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by
the equipment manufacturer.
Discard used batteries according to manufacture’s instructions.
ADVARSEL!
Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.
ADVARSEL
Eksplosjonsfare ved feilakting skifte av batteri.
Benytt samme batteritype eller en tilsvarende type anbefalt av
apparatfabrikanten.
Brukte batterier katterier kasseres i henhold til fabrikantens
VARNIG
Explosionsfara vid felaktigt batteribyte.
Användsamma batteritypeller enlikvärdig typsom rekommenderas
av apparattillverkaren.
Kassera använt batteri enligt gällande föreakrifter.
VAROITUS
Parist voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
Earth Ground
AC
voltmeter
(0.75V)
1.5k
Ω
0.15 µ F
Fig.A. Using an AC voltmeter to check AC leakage.
To Exposed Metal
Parts on Set

— 3 —
This appliance is classified as a CLASS 1
LASER product. The CLASS 1 LASER
PRODUCT MARKING is located on the
rear exterior.
The following caution label is located
inside the unit.
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.
The laser component in this product is
capable of emitting radiation exceeding
the limit for Class 1.
MODEL IDENTIFICATION
— BACK PANEL —
Parts No.
4-992-959-1 :AEP, UK, German model
4-992-959-2 : US model
4-992-959-3 : Canadian model
TABLE OF CONTENTS
1. SERVICING NOTE ······················································ 4
2. GENERAL ······································································ 7
3. DISASSEMBLY
3-1. Tray Assembly ···································································· 8
3-2. Bracket (Motor) ASSY ······················································· 9
3-3. Holder ASSY ······································································ 9
3-4. Base Unit ·········································································· 10
3-5. HMOT Board and HLIM Board······································· 10
4. TEST MODE ································································ 11
5. ELECTRICAL ADJUSTMENTS ··························· 14
6. DIAGRAMS
6-1. BD Section ······································································· 19
6-2. Digital Section ·································································· 21
6-3. Audio Section ··································································· 23
6-4. Power Section ··································································· 25
6-5. Circuit Boards Location ··················································· 26
6-6. Printed Wiring Board — BD Section — ·························· 28
6-7. Schematic Diagram — BD Section —····························· 31
6-8. Schematic Diagram — Digital Section — ······················· 35
6-9. Printed Wiring Board — Digital Section — ···················· 39
6-10. Printed Wiring Board —Audio Section — ······················ 42
6-11. Schematic Diagram — Audio Section —························· 45
6-12. Schematic Diagram — Power Section — ························ 48
6-13. Schematic Diagram — Panel Section — ························· 51
6-14. Printed Wiring Board — Panel Section —······················· 53
6-15. IC Block Diagrams ··························································· 56
6-16. IC Pin Functions ······························································· 61
7. EXPLODEDVIEWS
7-1. Main Section····································································· 73
7-2. Chassis Section································································· 74
7-3. Front Panel Section 1 ······················································· 75
7-4. Front Panel Section 2 ······················································· 76
7-5. Mechanism Section 1 (MDM-4B)···································· 77
7-6. Mechanism Section 2 (MDM-4B)···································· 78
7-7. Mechanism Section 3 (MDM-4B)···································· 79
7-8. Base Unit Section (MBU-2B) ·········································· 80
8. ELECTRICAL PARTS LIST ··································· 81

— 4 —
SECTION 1
SERVICING NOTE
HOWTO OPENTHE DISCTRAY WHEN POWER SWITCHTURNS OFF
1Remove the sixteen screws (BVTT 3×8) from the bottom plate.
2Remove the bottom plate.
3Rotate the pulley gear in the arrow direction A, and open the tray assembly in the arrow direction B.
Forced Reset
The system microprocessor can be reset in the following way.
Use these methods when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.
Method 2:
Disconnectthe powerplug, and short-circuitCN905 ofthe PWboard
with a pair of tweezers, etc.
[PW board] (Component Side)
CN905
(RESET)
CN901
Method 1:
Set TP (S.RST) of the DIG board to ground momentarily.
[DIG board] (Side A)
TP
(S.RST)
CN203
C206
IC202
Pully gear
Tray assembly
B
A

— 5 —
Retry Cause Display Mode
• In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent display tube.
This is useful for locating the faulty part of the unit.
• The retry cause, number of retries, and number of retry errors are displayed. Each is displayed in hexadecimal number.
Method:
1. Load a recordable disc whose contents can be erased into the unit.
2. Press the pbutton, §OPEN/CLOSE button, DISPLAY/CHAR button simultaneously.
3. Press the rbutton, and start recording.
4. The ## value increases with each retry. If an error occurs after a retry, the @@ count will also increase.
5. To exit the test mode, press the TIME button.
Fig. 1 Reading theTest Mode Display
R.T s ∗∗c # # e @@
Fluorescent DisplayTube Signs
∗∗: Cause of retry
# # : Number of retries
@@: Number of retry errors
All three displays above are in hexadecimal numbers.

— 6 —
Reading the Retry Cause Display
Hexadecimal
Bit
Binary
Higher Bits Lower Bits
84218421
b7 b6 b5 b4 b3 b2 b1 b0
00000001
00000010
00000100
00001000
00010000
00100000
01000000
10000000
When more than 3.5 shocks are detected
When ADER was counted more than
five times continuously
When ADIP address is not continuous
(Not used)
When not in focus
When ABCD signal level exceeds the specified range
When spindle rotation is detected as slow
When access operation is not performed normally
Hexa-
decimal
shock *1
ader5
Discontinuousaddress
(Not used)
FCS incorrect
IVR rec error
Spindle is slow
Access fault
Cause of Retry Occurring conditions
01
02
04
08
10
20
40
80
*1 Some displays are not used depending on the microprocessor version.
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 nb6
Lower bit : 2 = 0010 nb1
In this case, the retry cause is combined of “spindle is slow” and “ader5”.
When A2 is displayed:
Higher bit : A = 1010 nb7+b5
Lower bit : 2 = 0010 nb1
The retry cause in this case is combined of “access fault”, “IVR rec error”, and “ader5”.
Hexadecimal n Binary ConversionTable
Hexadecimal Binary Hexadecimal Binary
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Reference:
In this test mode, when the ·button is pressed, and the disc is played back, the “PLAYBACK MODE” is set.
The display becomes as shown in Fig. 2. The playback mode is not used in particular during servicing.
44 ¢¢¢¢¢¢ p
Fig. 2 Display during Playback Mode
44 : Parts No. (Name of area named on TOC)
¢¢¢¢¢¢ : Address (Physical address on disc)
p: Track mode (Copyright information of each part, information on copyright, etc.)

— 7 —
SECTION 2
GENERAL
1POWER switch
2Remote sensor
3TIMER switch
4FILTER button
5SCROLL/CLOCK SET button
6DISPLAY/CHAR button
7Disc tray
80/)(fast backward/fast forward) buttons
9EDIT/NO/YES buttons
!º AMS knob
!¡ DIGITAL REC LEVEL knob
!™ ANALOG REC LEVEL L/R knob
!£ rREC (recording) button
!¢ p(stop) button
!∞P(pause) button
!§ ((play) button
!¶ §OPEN/CLOSE button
!• Display window
!ª TIME button
@º REPEAT button
@¡ PLAY MODE button
@™ INPUT switch
@£ PHONE LEVEL knob
@¢ PHONES jack
This section is extracted
from instruction manual.

— 8 —
SECTION 3
DISASSEMBLY
Note : Follow Xthe disassembly procedure in the numerical order given.
3-1.TRAY ASSEMBLY
1 Rotate the pulley gear in the arrow
direction A , and pull out the tray
assembly.
2 Two screws
(PTP 2.6x6)
3 Two screws
(PTP 2.6x6)
6 Gear 4
(Two gear)
7 Screw
(BVTT 3x6)
9 Shaft
0 Remove the tray assembly
in the arrow direction B .
A
B
Bracket (TOP)
Note:
When attaching the bracket (TOP), attach while
pressing the switch as shown in the figure.
• Precautions on Attaching
(Assemble in the reverse order of removal.)
Slider assembly
When attaching the tray assembly, first move the slider
assembly in the arrow direction B and set Pin A at the
position shown.
When attaching gear 4 (two in front), pull the tray
assembly in arrow direction A completely, and
position racks (L), (R) and (D) as shown in the
figure.
Rack (L)
Gear 4
Rack (D)
Hole
A
B
5 Gear 4
(Two gear)
8 Stopper
(Shaft A)
Pin A
4 Bracket
(TOP)

— 9 —
3-2. BRACKET (MOTOR) ASSY
1 Two screws
(BVTT 3x6)
2 Two screws
(BVTT 3x6)
4 Bracket (Motor) assembly
3 Connector (CN198 : HMOT board)
3-3. HOLDER ASSY
Shaft A
Slider assembly
1 When removing, move the slider assembly
in the arrow direction, and check that shaft
A is at the position shown in the figure.
3 Remove the four screws (BVTT 3x6), and
remove the four collars (dampers) and four
compression springs.
2 Connector
(CN198 :
HMOT board)

— 10 —
3-4. BASE UNIT
1 Leaf spring (UDL)
2 Leaf spring (UDR)
3 Holder assembly
5 Base unit
(MBU-2B)
4 Three screws
(BVTP 3x6)
3-5. HMOT BOARD AND HLIM BOARD
5 Stopper washer
6 Gear(HEAD C)
8 Gear(HEADB)
9 Two screws
(Precision P2x3)
1 Stopper
washer
3 Lever (OWH)
4 Torsion spring (OWH)
2 Shaft (OWH)
!™ HLIM board
!¡ Two screws
(PTP 2.6x6)
7 Stopperwasher
!º HMOT board

— 11 —
4-4. Selecting theTest Mode
Eight test modes are selected by turning the AMS knob.
SECTION 4
TEST MODE
4-1. Setting theTest Mode
While pressing the AMS knob, insert the power plug into the power supply inlet, and release the AMS knob.
4-2. Exiting theTest Mode
Press the REPEAT button. Unplug the power plug from an outlet.
4-3. Basic Operations of theTest Mode
All operations are performed using the AMS knob,YES button, and NO button.
The functions of these buttons are as follows.
For detailed description of each adjustment mode, refer to 5. Electrical Adjustments.
If a different adjustment mode has been selected by mistake, press the NO button to exit from it.
* The EEP MODE is not used in servicing. If set accidentally, press the NO button immediately to exit it.
4-4-1. Operating the Continuous Playback Mode
1. Entering the continuous playback mode
1Set the disc in the unit (either MO or CD).(MO: Recordable disc, CD: Disc for playback only).
2Rotate the AMS knob and display “CPLAY MODE”.
3Press theYES button to change the display to “CPLAY IN”.
4When access completes, the display changes to “C = AD = – –”.
Note : The “ ” displayed are arbitrary numbers.
2. Changing the parts to be played back
1Press theYES button during continuous playback to change the display to “CPLAY MID”, “CPLAY OUT”.
When pressed another time, the parts to be played back can be changed.
2When access completes, the display changes to “C = AD = – –”.
Note : The “ ” displayed are arbitrary numbers.
3. Ending the continuous playback mode
1Press the NO button. The display will change to “CPLAY MODE”.
2Press the §OPEN/CLOSE button and remove the disc.
Note 1 : The playback start addresses for IN, MID, and OUT are as follows.
IN 40h cluster
MID 300h cluster
OUT 700h cluster
Function
AMS knob
YES button
NO button
Contents
Changes parameters and modes
Proceeds onto the next step. Finalizes input.
Returns to previous step. Stops operations.
Contents
Temperature compensation offset adjustment
Laser power adjustment
Traverse adjustment
Focus bias adjustment
Focus bias check
Continuous playback mode
Continuous recording mode
Non-volatile memory mode *
Display
TEMPADJUS
LDPWR ADJUS
EFBAL ADJUS
FBIAS ADJUS
FBIAS CHECK
CPLAY MODE
CREC MODE
EEP MODE
Test Mode initial display

— 12 —
4-4-2. Operating the Continuous Recording Mode
1. Entering the continuous recording mode
1Set the MO disc in the unit.
2Rotate the AMS knob and display “CREC MODE”.
3Press theYES button to change the display to “CREC IN”.
4When access completes, the display changes to “CREC ( ” an
REC
lights up.
Note : The “ ” displayed are arbitrary numbers.
2. Changing the parts to be recorded
1When theYES button is pressed during continuous recording, the display changes to “CREC MID”, “CREC OUT” and
REC
goes
off.
When pressed another time, the parts to be recorded can be changed.
2When access completes, the display changes to “CREC ( ” and
REC
lights up.
Note : The “ ” displayed are arbitrary numbers.
3. Ending the continuous recording mode
1Press the NO button. The display changes to “CREC MODE” and
REC
goes off.
2Press the §OPEN/CLOSE button and 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 NO button can be used to stop recording anytime.
Note 3 : During the test mode, the erasing-protection tab will not be detected. Therefore be careful not to set the continuous recording
mode when a disc not to be erased is set in the unit.
Note 4 : Do not perform continuous recording for long periods of time above 5 minutes.
Note 5 : During continuous recording, be careful not to apply vibration.
4-4-3. Non-Volatile Memory Mode
This mode reads and writes the contents of the non-volatile memory.
It is not used in servicing. If set accidentally, press the NO button immediately to exit it.
4-5. Functions of Other buttons
Function
·
p
)
0
r
SCROLL/
CLOCK SET
PLAY MODE
DISPLAY/
CHAR
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.
Turns recording ON/OFF when pressed during continuous playback.
Switches between the pit and groove modes when pressed.
Switches the spindle servo mode (CLVS and A).
Switches the display when pressed.Returns to previous step. Stops operations.
Note : The erasing-protection tab is not detected during the test mode. Recording will start regardless of
the position of the erasing-protection tab when the rbutton is pressed.

— 13 —
4-6. Test Mode Displays
Each time the DISPLAY/CHAR button is pressed, the display changes in the following order.
MODE display nError rate display nAddress display
1. MODE display
Displays “TEMP ADJUS”, “CPLAY MODE”, etc.
2. Error rate display
Error rates are displayed as follows.
C = AD =
C = : Indicates C error
AD = : Indicates ADER
3. Address display
Addresses are displayed as follows.
“h s ” (MO pit and CD)
“h a ” (MO groove)
h : Header address
s : SUBQ address
a : ADIP address
* “—” is displayed when the address cannot be read.
4-7. Meanings of Other Displays
During continuous playback
Tracking servo OFF
Recording mode ON
CLV LOCK
Pit
High reflection
CLV-S
ABCD adjustment completed
STOP
Tracking servo ON
Recording mode OFF
CLV UNLOCK
Groove
Low reflection
CLV-A
Display Contents
Light Blinking
Off
Focus auto gain successful
Tracking auto gain successful
Focus auto gain successful
Tracking auto gain failed
4-8. Precautions for Use ofTest Mode
1As 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 §OPEN/CLOSE 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.
Always press the NO button first before pressing the §OPEN/CLOSE button.
2The erasing-protection tab is not detected in the test mode. Therefore, when modes which output the recording laser power such as
continuous recording mode and traverse adjustment mode, etc. are set, the recorded contents will be erased regardless of the position of
the tab. When using a disc that is not to be erased in the test mode, be careful not to enter the continuous recording mode and traverse
adjustment mode.
·
P
REC
CLOCK
TRACK
DISC
DATE
A. SPACE
A – B

— 14 —
SECTION 5
ELECTRICAL ADJUSTMENTS
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.
Precautions for Use of optical pick-up (KMS-210A)
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.
Precautions for Adjustments
1) When replacing the following parts, perform the adjustments
and checks with ®in the order shown in the following table.
Optical pick-up flexible board
4. Focus bias
adjustment
5. Error rate check
BD Board
Optical
Pick-up
1. Temperature
compensation
offset adjustment
2. Laser power
adjustment
3. Traverse
adjustment
IC171 D101 IC101, IC121, IC191
G¬¬
¬
¬¬
¬¬ ¬
¬¬¬
¬
¬¬
GG
G
G
G
2) Set the test mode when performing adjustments.
After completing the adjustments, exit the test mode.
3) Perform the adjustments in the order shown.
4) Use the following tools and measuring devices.
• Check Disc (CD) TGYS-1 (Parts No. 4-963-646-01)
• Laser power meter LPM-8001 (Parts No. J-2501-046-A)
• Oscilloscope
• Digital voltmeter
• Thermometer
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.)
Creating Continuously Recorded Disc
* This disc is used in focus bias adjustment and error rate check.
The following describes how to create a continuous recording
disc.
1. Insert a MO disc (blank disc) commercially available.
2. Rotate the AMS knob and display “CREC MODE”.
3. Press theYES button and display “CREC IN”.
4. Press theYES button again to display “CREC MID”.
“CREC (0300” is displayed for a moment and recording starts.
5. Complete recording within 5 minutes.
6. Press the NO button and stop recording .
7. Press the §OPEN/CLOSE button and remove the MO disc.
The above has been how to create a continuous recording data for
the focus bias adjustment and error rate check.
Note :
• Be careful not to apply vibration during continuous recording.
laser tap
• Abbreviation
MO : Recordable disc
CD : Disc for playback only

— 15 —
Temperature Compensation Offset Adjustment
Save the temperature data at that time in the non-volatile memory
as 25 ˚C reference data.
Note :
1. Usually, do not perform this adjustment.
2. Perform this adjustment in an ambient temperature of 22 ˚C to
28 ˚C. Perform it immediately after the power is turned on
when the internal temperature of the unit is the same as the
ambient temperature.
3. When D101 has been replaced, perform this adjustment after
the temperature of this part has become the ambient
temperature.
Adjusting Method :
1. Rotate the AMS knob and display “TEMP ADJUS”.
2. Press theYES button and select the “TEMP ADJUS” mode.
3. “TEMP = ” and the current temperature data will be
displayed.
4. To save the data, press theYES button.
When not saving the data, press the NO button.
5. When theYES button is pressed, “TEMP = SAV” will be
displayed for some time, followed by “TEMP ADJUS”.
When the NO button is pressed, “TEMP ADJUS” will be
displayed.
Specifications :
The “TEMP = ” should be within “E0 - EF”, “F0 - FF”, “00 -
0F”, “10 - 1F” and “20 - 2F”.
Laser Power Adjustment
Connection :
Laser power
meter
Optical pick-up
objective lens
Digital voltmeter
BD board
TP (I + 5V)
TP (IOP)
Adjusting Method :
1. Set the laser power meter on the objective lens of the optical
pick-up. (When it cannot be set properly, press the 0button
or )button and move the optical pick-up.)
Connect the digital volt meter to TP (IOP) and TP (I+5V).
2. Rotate the AMS knob and display “LDPWR ADJUS”.
(Laser power : For adjustment)
3. Press theYES button twice and display “LD $ 4B = 3.5 m”.
4. Adjust RV102 of the BD board so that the reading of the laser
power meter becomes 3.45 ± 0.1mW.
5. Press theYES button and display “LD $ 96 = 7.0 m”.
(Laser power : MO writing)
6. Check that the laser power meter and digital voltmeter readings
satisfy the specified value.
Specification :
Laser power meter reading :7.0
+ 0.2
mW
Digital voltmeter reading :Optical pick-up displayed value ± 10%
(Optical pick-up label)
lop = 82.5 mA in this case
lop (mA) = Digital voltmeter reading (mV)/ 1 ( Ω )
7. Press theYES button and display “LD $ 0F = 0.7 m”.
(Laser power : MO reading)
8. Check that the laser power meter at this time satisfies the
specified value.
Specification :
Laser power meter reading :0.70
+ 0.05
mW
9. Press the NO button and display “LDPWRADJUS”, and stop
laser emission.
(The NO button is effective at all times to stop the laser
emission.)
KMS
210A
27X40
B0825
– 0.3
– 0.1

— 16 —
Traverse Adjustment
Connection :
servo is imposed.
11. Rotate the AMS knob until the waveform of the oscilloscope
moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 3%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
VC
A
B
Specification A=B
(Traverse Waveform)
12. Press theYES button, display “EFB = $ SAV” for a moment
and save the adjustment results in the non-volatile memory.
Next “EFBAL CD” is displayed. The disc stops rotating
automatically.
13. Press the §OPEN/CLOSE button and remove the MO disc.
14. Load the check disc (MD) TDYS-1.
15. Press the YES button and display “EFB = $ CD”. Servo is
imposed automatically.
16. Rotate the AMS knob so that the waveform of the oscilloscope
moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 3%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
VC
A
B
Specification A=B
(Traverse Waveform)
17. Press theYES button, display “EFB = $ SAV” for a moment
and save the adjustment results in the non-volatile memory.
Next “EFBAL ADJUS” is displayed.
18. Press the §OPEN/CLOSE button and remove the test disc
TDYS-1.
Note 1 : Data will be erased during MO reading if a recorded disc
is used in this adjustment.
Note 2 : If the traverse waveform is not clear, connect the
oscilloscope as shown in the following figure so that it
can be seen more clearly.
BD board
TP (TEO)
TP (VC)
330k Ω
10pF
Oscilloscope
Oscilloscope
BD board
TP (TEO)
TP (VC)
Adjusting method :
1. Connect an oscilloscope to TP (TEO) and TP (VC) of the BD
board.
2. Load a MO disc (any available on the market).
3. Press the 0button or )button and move the optical pick-
up outside the pit.
4. Rotate the AMS knob and display “EFBAL ADJUS”.
5. Press the YES button and display “EFBAL MO-W”.
(Laser power WRITE power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
6. Adjust RV101 of the BD board so that the waveform of the
oscilloscope becomes the specified value.
(MO groove write power traverse adjustment)
(Traverse Waveform)
VC
A
B
Specification A = B
7. Press the YES button and display “EFB = $ MO-R”.
(Laser power : MO reading)
8. Rotate the AMS knob so that the waveform of the oscilloscope
becomes the specified value.
(When theAMS knob is rotated, the of “EFB= $ ” changes
and the waveform changes.) In this adjustment, waveform
varies at intervals of approx. 3%. Adjust the waveform so that
the specified value is satisfied as much as possible.
(MO groove read power traverse adjustment)
VC
A
B
Specification A=B
(Traverse Waveform)
9. Press theYES button, display “EFB = $ SAV” for a moment
and save the adjustment results in the non-volatile memory.
Next “EFBAL MO-P” is displayed.
10. Press the YES button and display “EFB = $ MO-P”.
The optical pick-up moves to the pit area automatically and

MDS-JA30ES
— 17 — — 18 —
Focus Bias Adjustment
Adjusting Method :
1. Load a continuously recorded disc (Refer to “Page 14 Creating
Continuously Recorded Disc”.).
2. Rotate the AMS knob and display “CPLAY MODE”.
3. Press theYES button twice and display “CPLAY MID”.
4. Press the NO button when “C = AD = ” is displayed.
5. Rotate the AMS knob and display “FBIAS ADJUS”.
6. Press theYES button and display “ / a = ”.
The first four digits indicate the C1 error rate, the two digits
after [/] indicate ADER,and the 2 digits after [a =] indicate the
focus bias value.
7. Rotate the AMS knob in the clockwise direction and find the
focus bias value at which the C1 error rate becomes 220.
8. Press theYES button and display “ / b = ”.
9. Rotate the AMS knob in the counterclockwise direction and
find the focus bias value at which the C1 error rate becomes
220.
10. Press the YES button and display “ / c = ”.
11. Check that the C1 error rate is below 50 and ADER is 00.Then
press the YES button.
12. If the “( ” in “ - - ( ” is above 20, press the
YES button.
If below 20, press the NO button and repeat the adjustment
from step 2 again.
13. Press the NO button and press the §OPEN/CLOSE button to
remove the continuously recorded disc.
Note 1 : The relation between the C1 error and focus bias is as
shown in the following figure. Find points a and b in the
following figure using the above adjustment. The focal
point position C is automatically calculated from points a
and b.
Note 2 : As theC1 error ratechanges, perform theadjustment using
the average value.
Error Rate Check
CD Error Rate Check
Checking Method :
1. Load a check disc TGYS-1.
2. Rotate the AMS knob and display “CPLAY MODE”.
3. Press theYES button twice and display “CPLAY MID”.
4. “C = AD = ” is displayed.
5. Check that the C1 error rate is below 20.
6. Press the NO button, stop playback, press the §OPEN/CLOSE
button, and remove the test disc.
MO Error Rate Check
Checking Method :
1. Load a continuously recorded disc (Refer to “Page 14 Creating
Continuously Recorded Disc”.).
2. Rotate the AMS knob and display “CPLAY MODE”.
3. Press theYES button twice and display “CPLAY MID”.
4. “C = AD = ” is displayed.
5. If the C1 error rate is below 50, check thatADER is 00.
6. Press the NO button, stop playback, press the §OPEN/CLOSE
button, and remove the continuously recorded disc.
Focus Bias Check
Change the focus bias and check the focus tolerance amount.
Checking Method :
1. Load a continuously recorded disc (Refer to “Page 14 Creating
Continuously Recorded Disc”.).
2. Rotate the AMS knob and display “CPLAY MODE”.
3. Press theYES button twice and display “CPLAY MID”.
4. Press the NO button when “C = AD = ” is displayed.
5. Rotate the AMS knob and display “FBIAS CHECK”.
6. Press theYES button and display “ / c = ”.
The first four digits indicate the C1 error rate, the two digits
after [/] indicateADER, and the 2 digits after [c =] indicate the
focus bias value.
Check that the C1 error is below 50 andADER is 00.
7. Press theYES button and display “ / b = ”.
Check that the C1 error is not below 220 andADER is not
above 00 every time.
8. Press theYES button and display “ / a = ”.
Check that the C1 error is not below 220 and ADER is not
above 00 every time.
9. Press the NO button, next press the §OPEN/CLOSE button,
and remove the continuously recorded disc.
Note 1 : If the C1 error and ADER are above 00 at points a or b,
the focus bias adjustment may not have been carried out
properly. Adjust perform the beginning again.
C1 error
Focus bias value
(F. BIAS)
b
220
ca
Adjusting Points and Connecting Points
[BD BOARD] (SIDE A)
D101
[BD BOARD] (SIDE B)
(IOP) (I + 5V)
RV101 (VC)
RV102 (TEO)
IC121
IC171
IC101
IC191

MDS-JA30ES SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM — BD SECTION —
— 19 — — 20 —
OPTICAL PICK-UP BLOCK
(KMS-210A/J-N)
IV-AMP
IV-AMP
JCB
DA
F
E
6
2
3
6
5
VC
7
1
IC172
BUFFER 48
47
J
IRF AMP
46 45 44 43
RF AGC
& EQ
BPF
2
3
4
5
6
7
IV AMP
IV AMP
6
8
VC
RV101
E-F
BALANCE
9
1+2.5V
GENERATOR
VC
16
12
D101 TEMP
AMP
TEMPR +5V
TEMPI
10
11
Q101
APC
APCREF
LASER ON
SWITCH
LASER
POWER
RV102
PD
14 15
42
TRACKING
ERROR
AMP
AUX
SW
PEAK &
BOTTOM
ABCD
AMP
FOCUS
ERROR
AMP
AT
AMP 30
26
29
27
25
23
22
41
34
38
39
37
35
31
33
SERIAL
PARALLEL
DECODER
17 18 19 20
4
RF AMP
IC101
+5V
HR901
OVER
WRITE
HEAD
4
2IC122
Q162,163
APC
HIGH
POWER
LD
Q164
HF
MODULE
SWITCH SLED/SPINDLE MOTOR DRIVE,
FOCUS/TRACKING COIL DRIVE
IC151
HEAD
DRIVE
Q181,182 11
14
15
17
18
OVER WRITE
HEAD DRIVE
IC181
1
19
2
3
9
5
IC102
42
VC
DRIVER
DRIVER
DRIVER
L.F
MOD
H.F
MOD
26
29
TRK+
TRK–
11
8
15
13
TRACKING
COIL
FOCUS
COIL 2
2
M
M101
SLED
MOTOR
22
24
M
M102
SPINDLE
MOTOR
2
2
CLOCK
DETECTOR 3
Q151
RESET
SWITCH
33
DRIVER
20
19
18
17
6
5
31
32
TFDR
TRDR
FRDR
FFDR
SFDR
SRDR
SPFD
SPRD
FS4
DIGITAL SIGNAL PROCESSOR,
DIGITAL SERVO SIGNAL PROCESSOR,
EFM/ACIRC ENCODER/DECODER
IC121
SUBCODE
PROCESSOR,
READER/
GENERATOR
14
EFM
MOD/DEMOD
45
58
DIN
PLL
REGISTER
FILTER
PLL
4
EFM
TIMING
GENERATOR
DIGITAL
CLV
PROCESSOR
TIMING
GENERATOR
&
CLOCK
GENERATOR
AUDIO
DATA
CONTROL
ECC
ENCODER
DECODER
32K RAM
30
29
27
28
DIGITAL
AUDIO
IN/OUT
20
21
15
FILTER
31
94
93
82 ADIP
DEMOD ADIP
DECODER
ANALOG
MUX
68
65
64
66
67
77
76
69VC
5
A/D
CONV
8
9
10
16
CPU
IF
24
11
4
SERVO
CONTROL
DIRC
7
SERVO
AUTO
SEQUENCER
PROCESSOR
APC
PWM
GEN
5
SERVO DSP/PWM GENERATOR
FOCUS/TRACKING/
SLED SERVO & PWM
6
4
3
2
98
99
DFCT
FOK
SHCK
OFTRK
COUT
6
84
LD
32
33
90
35
BCK
LRCK
FS4
XTAI
SENS
CONTROL
12 85 86 87 89 91 92
6
51 52 49 53
DICV
DIFI
DIPD
DIFO
SQSY
DQSY
DIN
DOUT
DIDT
DODT
DTO
DTI
C2PO
TRDR
TFDR
FFDR
FRDR
SRDR
SFDR
SENS
SWDT
SCLK
XLAT
XRST
REC
SRDT
AUX
BOTM
PEAK
ABCD
FE
TE
SE
VC
SPFD
SPRD
60
62
61
63
CLTV
FILI
PCO
FILO
EFMO
RFI
RF
AUX
BOTM
PEAK
ABCD
FE
ADFM
ADIN
TE
SE
TLB
ADFG
XRST
SWDT
SCLK
XLAT
PD
VC
A
B
C
D
E
F
FI
FO
FCS+
FCS–
SLED–
SLED+
SPDL+
SPDL–
42
IC182
8
LDDR
AAPC DAPC
I
WRPWR
LIMIT
INSW
OUTSW
HDS
HUS
PROTECT
REFLECT
5
-1 -2 S102-1
PROTECT
S102-2
REFLECT
S101
LIMIT IN
SW191
LOAD IN DET
SW192
LOAD OUT DET
SW193
HEAD DOWN
DET
SW194
HEAD UP DET
IC171
MEMORY
6
5 SDA
SCL
SDA
SCL
WRPWR
FG
SHCK
FOK
DFCK
512FS
SQSY
SCTX
SWDT
SCLK
XLAT
SRDT
SENS
LRCK
BCK
C2PO
L OUT
L IN
HU
HD
DATA
DODT
DOUT
LDON
MOD
REC
DIGITAL
SECTION
(Page 21)
A
16
P-P TFIL
THID
TENV
M
M
M191
LOADING MOTOR
M192
HEAD MOTOR
XRST
Signal Path
PB
REC
PB
REC (Digital out)
(Digital in)
:
:
:
:

MDS-JA30ES
— 21 — — 22 —
6-2. BLOCK DIAGRAM — DIGITAL SECTION —
OSCO
12
69
•
68
•
70
•
71
16
17
4
3
61
62
66
67
XOE
XCAS
XRAS
XWE
93
90
91
97
TX
DATA
LRCK
BCK
MIN
C2PO
92
EFM
DATA
INTERFACE RAM
INTERFACE
4
CPU
TIMING
CONTROL
ATRAC
INTERFACE
CPU
INTERFACE
ATRAC
ENCODER
/DECODER
DODT
DIDT
DOUT
ADIN
ALRCK
ABCK
ATRAC ENCODER/DECODER
IC206
16
2
2 3 5678911 17 26
13 2 5
SWDT
SCK
XLAT
SRDT
SENSE
SCMD0
XINT
WRMN
XRST
AIRCPB
SCMD1
CLOCK
GENERATOR
44
4
7 13
BUFFER
IC210
21 DATAO DECIMATION
FILTER
SAMPLING
RATE
CONVERTER
ATT
OVER
SAMPLING
FILTER
IIR I/F DATAI
SAMPLING
RATE
DETECTOR
23
5
6
SYSTEM
CONTROLLER
4
19
21
22 TIMING
23
C
BIT
DET SUBQ
DET
MICON
I/F
11 10 14 15 16 17 18 24
19
726
3SRDT
28 58
MOTOR
DRIVE
7
15 4
LOADING
MOTOR DRIVE
IC201
MOTOR
DRIVE
7
15 4
HEAD MOTOR DRIVE
IC212
DIGITAL AUDIO INTERFACE RECEIVER
IC203
19 13
16
15
14
DIGITAL
REC
LEVEL
97
DVOL
RV602
IC213IC211
CLOCK DIVIDER
CLK Q
42 QD
RESET
RESET
SWITCH
Q201
SWITCH
Q202
20 43
2472
32303331
4
2355545756 58
52
51
60
59
77
78
80
INSW
OUTSW
HDOWNS
HUPS
PROTECT
REFLECT
LIMIT-IN
INSW
OUTSW
HD
HU
PROTECT
REFLECT
LIMIT
5
67
69
70
71
76
79
61
66
68
74
75 SDA SCL
SQSY
SCTX
FOK
SHCK
WRPWR
SENS
LDON
REC/PB
MOD
FG
SQSY
FOK
SHCK
WRPWR
SENS
LDON
REC
MOD
FG
SDA
SCL
SYSTEM CONTROL
IC202
HUP
HDWN
LDIN
LDOUT
XINT
37RST
SWDT
SCLK
XLATCH
SRDT
04LAT
DQSY
DIG-RST
EROR
44
SRCRST
45
SRC TEST
35
37
38
POWER DOWN
FLDATA
FLCLK
FLCS
S702
FL DRIVER
IC701
RST
SDATA
SCK
CS
59
33
•
31
23
S1
S36 12
1
64
61
D1
D16
KEY
MATRIX
90
95
KEY1
KEY3
•
KEY0
•
TIMER
•
SORCE
84
•
86
•
88
•
100
•
83
PLAY
•
REC
•
PAUSE
•
DF
•
POWER
LED
DRIVER
Q701-704,
781
3
4ROTARY
ENCODER
JOG0
JOG1
1
6
REMOCON OUT
D701-704,
781
S702
AMS
PUSH ENTER
REMOTE CONTROL
RECEIVER
IC781
FL701
FLUORESCENT
INDICATOR
TUBE
F1
F2
TO
POWER
TRANSFORMER
10
11
13
15
X202
32.768KHz
X201
10MHz
XIN-T
XOUT-T
XOUT
XIN
40 4142
DIN/XMD
COAX/XOPT
OPT1/XOPT2
27
26
25
28
29
95LAT
95RST
62RST
ADRST
ADLAT
12
49
50
DA-MUTE
STB
SYSTEM-RST
DOUT
ADIN
ALRCK
ABCK
XRST
1024FS
ATT(SW DT)
SHIFT(SCLK)
256FS
LATCH
95RST
B
AUDIO
SECTION
(Page 23)
P. DOWN
DA-MUTE
STB
S.RST
C
POWER
SECTION
(Page 25)
DOUT
DODT
SCTX
DATA
LRCK
BCK
DFCK
C2PO
512FS
XRST
SWDT
SCLK
XLAT
SRDT
LDOUT
LDIN
HD
HU
A
BD
SECTION
(Page 20)
16
2CE
SRDT
1
44
43
41
42
95
94
1
•
2
•
18
•
19
6
9
•
11
15
•
5
DQ1
DQ4
A0
A9
OE
CAS
RAS
WE
DRAM
IC208
53
54
55
LRCKI
BCKI
FIMCK
FIMO
LRCKO
SCK
XLAT
SWDT
BCKO
317
713
515
911
12 8
DATAO
18 2DATA
MODULATION
16 4
14 6
LRCK
BCK
CKOUT
INPUT
SAMPLING RATE CONVERTER, DIGITAL FILTER
IC207
AVOCK
XMODE
SCLK
XLAT
SWDT
SRDT
DQSY
EROR
DIN1
IC205
ABCK
ALRCK
SCLK
XLAT
SWDT
SRDT
4
2
2
87 SPO
36 37
OSCI
9
XI
XO
INIT TEST1
IC205
4
•
55
52
•
56
60
•
65
13
14 12
1
7 3
4
5
6
DIGITAL IN SELECTOR
IC352
142
DIGITAL OUT
SELECTOR
IC351
3
3
1
J351
IC353
IC355
IC356
COAXIAL
OPT1
OPT2
DIGITAL
OUT
OPTICAL
DIGITAL
IN
SEL
SEL1 SEL0
8 5
41
10 13
IC354
1
22
51
52
PLL
Signal Path
PB
REC
PB
REC (Digital out)
(Digital in)
:
:
:
:

MDS-JA30ES
— 23 — — 24 —
6-3. BLOCK DIAGRAM — AUDIO SECTION —
DOUT
ABCK
ALRCK S/P
LRCKI
DATAI
BCKI
44
43
45 ATT IIR
MODE
FIR P/S
CONVERT
AND
D/F
CLOCK GEN.
TIMING
CIRCUIT CLOCK GENERATOR
17
47 48 49 46
ATT
SHIFT
LATCH
INIT
MCKIN
12
64FSI
NSDOL1-4 46
|
49
6
|
3
S/P
INTER
POLATER
40 64FSO
33
DINIT 50 MUTE
35 256FSO
TIMING
CIRCUIT
10
3rd ORDER
NOISE SHAPER
PLM
D/A CONVERTER
IC502
CLOCK
GENERATOR
L1(+)
L1(–)
L2(+)
L2(–)
62
60
2
4
32
33LVCK01
LVCK02
25
24
27
28
IN1+
IN1–
IN2+
IN2–
SWITCHING
CIRCUIT
1
2
4
5
CURRENT PULSE
IC505
IO1+
IO2–
IO1–
IO2+
CONSTANT
CURRENT
CIRCUIT
6
2
LPF
LPF
7
1
+
+
L.P.F.
IC509
6
57 3 1
MIX/LINE AMP
IC510
XIN XOUT
9
X501
45MHz
HEADPHONE
AMP
IC651
31
RV651
RY501
RCH J651
MUTE
Q651,654
RELAY
DRIVE
Q505
HP MUTE
RELAY
PHONES
L
PJ501
LINE
OUT
D
POWER
SECTION
(Page 25)
PHONE
LEVEL
L
PJ501 LINE
IN
ANALOG
REC
LEVEL
RV601
3
LINE AMP
IC305
2
3
6
1
57
L.P.F., PRE AMP
IC303
7
6
LPF
DAC
19 L/R
21
17
MCLK
A/D CONVERTER
IC302
SDATA +
_+
AINL–
AINL+
ADIN
256FS
ATT(SWDT)
SHIFT(SCLK)
LATCH
95RST
1024FS
B
DIGITAL
SECTION
(Page 22)
16
NOISE SHAPER, DIGITAL FILTER
IC501
1
5
+5V
7
4
Signal path
R CH is omitted.
:PB
:REC