Sony MDSJA-30-ES Service manual
MDS-JA30ES
SERVICE MANUAL
Photo: GOLD
U.S. and foreign patents licensed from Dolby Laboratories
Licensing Corporation.
SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
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
MICROFILM
— Continued on next page —
MINIDISC DECK
SAFETY CHECK-OUT
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for A C 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. Follo w 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 v oltmeter . The “limit” indication
is 0.75 V, so analog meters must have an accurate lo w-v olta ge
scale. The Simpson 250 and Sanwa SH-63Trd are e xamples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by
the equipment manufacturer.
Discard used batteries according to manufacture’s instructions.
ADVARSEL!
Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.
ADVARSEL
Eksplosjonsfare ved feilakting skifte av batteri.
Benytt samme batteritype eller en tilsvarende type anbefalt av
apparatfabrikanten.
Brukte batterier katterier kasseres i henhold til fabrikantens
VARNIG
Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en likvärdig typ som rekommenderas
av apparattillverkaren.
Kassera använt batteri enligt gällande föreakrifter.
VAROITUS
Parist voi räjähtää, jos se on virheellisesti asennettu.
V aihda paristo ainoastaan laitev almistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
To Exposed Metal
Parts on Set
AC
0.15µF
1.5k
Ω
voltmeter
(0.75V)
Earth Ground
Fig. A. Using an AC voltmeter to check A C leakage.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH
MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
LES COMPOSANTS IDENTIFÉS P AR UNE MARQUE ! SUR LES
DIAGRAMMES SCHÉMA TIQUES 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.
À LA SÉCURITÉ!
— 2 —
The 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.
TABLE OF CONTENTS
1. SERVICING NOTE ······················································ 4
2. GENERAL ······································································ 7
3. DISASSEMBLY
3-1. T ray 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
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.
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. EXPLODED VIEWS
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
MODEL IDENTIFICATION
— BACK PANEL —
4-992-959-1 : AEP, UK, German model
4-992-959-2 : US model
4-992-959-3 : Canadian model
8. ELECTRICAL PARTS LIST ··································· 81
Parts No.
— 3 —
SECTION 1
SERVICING NOTE
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF
1 Remove the sixteen screws (BVTT 3×8) from the bottom plate.
2 Remove the bottom plate.
3 Rotate the pulley gear in the arrow direction A, and open the tray assembly in the arrow direction B.
Pully gear
A
B
Tray assembly
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 1:
Set TP (S.RST) of the DIG board to ground momentarily.
[DIG board] (Side A)
CN203
TP
(S.RST)
Method 2:
Disconnect the power plug, and short-circuit CN905 of the PW board
with a pair of tweezers, etc.
[PW board] (Component Side)
CN905
(RESET)
IC202
CN901
C206
— 4 —
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 p button, §OPEN/CLOSE button, DISPLAY/CHAR button simultaneously.
3. Press the r button, 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 the Test Mode Display
R.T s ∗ ∗ c # # e @@
Fluorescent Display Tube Signs
∗ ∗ : Cause of retry
# # : Number of retries
@@: Number of retry errors
All three displays above are in hexadecimal numbers.
— 5 —
Reading the Retry Cause Display
Higher Bits Lower Bits
Hexadecimal
Bit
Binary
*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 n b6
Lower bit : 2 = 0010 n b1
In this case, the retry cause is combined of “spindle is slow” and “ader5”.
84218421
b7 b6 b5 b4 b3 b2 b1 b0
00000001
00000010
00000100
00001000
00010000
00100000
01000000
10000000
Hexa-
decimal
01
02
04
08
10
20
40
80
Cause of Retry Occurring conditions
shock *1
ader5
Discontinuous address
(Not used)
FCS incorrect
IVR rec error
Spindle is slow
Access fault
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
When A2 is displayed:
Higher bit : A = 1010 n b7+b5
Lower bit : 2 = 0010 n b1
The retry cause in this case is combined of “access fault”, “IVR rec error”, and “ader5”.
Hexadecimal n Binary Conversion Table
Hexadecimal Binary Hexadecimal Binary
0
1
2
3
4
5
6
7
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
0000
0001
0010
0011
0100
0101
0110
0111
8
9
A
B
C
D
E
F
1000
1001
1010
1011
1100
1101
1110
1111
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.)
— 6 —
SECTION 2
GENERAL
This section is extracted
from instruction manual.
1 POWER switch
2 Remote sensor
3 TIMER switch
4 FILTER button
5 SCROLL/CLOCK SET button
6 DISPLAY/CHAR button
7 Disc tray
8 0/) (fast backward/fast forward) buttons
9 EDIT/NO/YES buttons
!º AMS knob
!¡ DIGITAL REC LEVEL knob
!™ ANALOG REC LEVEL L/R knob
!£ r REC (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
— 7 —
SECTION 3
DISASSEMBLY
Note : Follow Xthe disassembly procedure in the numerical order given.
3-1. TRA Y ASSEMBL Y
2
Two screws
(PTP 2.6x6)
3
Two screws
(PTP 2.6x6)
4
Bracket
(TOP)
A
5
Gear 4
(Two gear)
7
Screw
(BVTT 3x6)
8
Stopper
(Shaft A)
9
Shaft
6
Gear 4
(Two gear)
1
Rotate the pulley gear in the arrow
direction A, and pull out the tray
assembly.
0
Remove the tray assembly
in the arrow direction B.
• 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.
Pin
Bracket (TOP)
B
Note:
When attaching the bracket (T OP), attach while
pressing the switch as shown in the figure.
A
B
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)
A
Hole
Rack (D)
Gear 4
— 8 —
3-2. BRACKET (MOTOR) ASSY
1
Two screws
(BVTT 3x6)
3
Connector (CN198 : HMOT board)
4
Bracket (Motor) assembly
2
Two screws
(BVTT 3x6)
3-3. HOLDER ASSY
Slider assembly
Shaft
A
1
When removing, move the slider assembly
in the arrow direction, and check that shaft
A is at the position shown in the figure.
2
Connector
(CN198 :
HMOT board)
3
Remove the four screws (BVTT 3x6), and
remove the four collars (dampers) and four
compression springs.
— 9 —
3-4. BASE UNIT
3
Holder assembly
5
Base unit
(MBU-2B)
1
Leaf spring (UDL)
2
Leaf spring (UDR)
4
Three screws
(BVTP 3x6)
3-5. HMOT BOARD AND HLIM BOARD
6
7
Stopper washer
8
Gear (HEAD B)
9
Two screws
(Precision P2x3)
5
Stopper washer
Gear (HEAD C)
1
Stopper
washer
3
Lever (OWH)
2
Shaft (OWH)
4
Torsion spring (OWH)
!¡
Two screws
(PTP 2.6x6)
— 10 —
!™
HLIM board
!º
HMOT board
SECTION 4
TEST MODE
4-1. Setting the Test Mode
While pressing the AMS knob, insert the power plug into the power supply inlet, and release the AMS knob.
4-2. Exiting the Test Mode
Press the REPEAT button. Unplug the power plug from an outlet.
4-3. Basic Operations of the Test Mode
All operations are performed using the AMS knob, YES button, and NO button.
The functions of these buttons are as follows.
Function
AMS knob
YES button
NO button
Changes parameters and modes
Proceeds onto the next step. Finalizes input.
Returns to previous step. Stops operations.
4-4. Selecting the Test Mode
Contents
Test Mode initial display
Eight test modes are selected by turning the AMS knob.
Display
TEMP ADJUS
LDPWR ADJUS
EFBAL ADJUS
FBIAS ADJUS
FBIAS CHECK
CPLAY MODE
CREC MODE
EEP MODE
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 *
Contents
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
1 Set the disc in the unit (either MO or CD).(MO: Recordable disc, CD: Disc for playback only).
2 Rotate the AMS knob and display “CPLAY MODE”.
3 Press the YES button to change the display to “CPLAY IN”.
4 When access completes, the display changes to “C =
Note : The “
” displayed are arbitrary numbers.
AD = – –”.
2. Changing the parts to be played back
1 Press the YES 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.
2 When access completes, the display changes to “C =
Note : The “
” displayed are arbitrary numbers.
AD = – –”.
3. Ending the continuous playback mode
1 Press the NO button. The display will change to “CPLAY MODE”.
2 Press 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
— 11 —
4-4-2. Operating the Continuous Recording Mode
1. Entering the continuous recording mode
1 Set the MO disc in the unit.
2 Rotate the AMS knob and display “CREC MODE”.
3 Press the YES button to change the display to “CREC IN”.
4 When access completes, the display changes to “CREC (
” an
REC
lights up.
Note : The “ ” displayed are arbitrary numbers.
2. Changing the parts to be recorded
1 When the YES button is pressed during continuous recording, the display changes to “CREC MID”, “CREC OUT” and
off.
When pressed another time, the parts to be recorded can be changed.
2 When access completes, the display changes to “CREC ( ” and
REC
lights up.
Note : The “ ” displayed are arbitrary numbers.
3. Ending the continuous recording mode
1 Press the NO button. The display changes to “CREC MODE” and
REC
goes off.
2 Press 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.
REC
goes
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
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.
Contents
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 r button is pressed.
— 12 —
4-6. Test Mode Displays
Each time the DISPLAY/CHAR button is pressed, the display changes in the following order.
MODE display n Error rate display n Address 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
Display
·
P
REC
CLOCK
TRACK
DISC
DATE
A. SPACE
A – B
Light
During continuous playback
Tracking servo OFF
Recording mode ON
CLV LOCK
Pit
High reflection
CLV-S
ABCD adjustment completed
Focus auto gain successful
Tracking auto gain successful
STOP
Tracking servo ON
Recording mode OFF
CLV UNLOCK
Groove
Low reflection
CLV-A
Contents
Off
Blinking
Focus auto gain successful
Tracking auto gain failed
4-8. Precautions for Use of Test Mode
1 As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is
stopped before setting and removing it.
Even if the §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.
2 The 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.
— 13 —
SECTION 5
ELECTRICAL ADJUSTMENTS
Precautions for Checking Laser Diode Emission
T o check the emission of the laser diode during adjustments, ne v er
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 remov e the solder . Also
take adequate measures to prevent damage by static electricity.
Handle the flexible board with care as it breaks easily.
laser tap
Optical pick-up flexible board
• Abbreviation
MO : Recordable disc
CD : Disc for playback only
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
1. Temperature
compensation
offset adjustment
2. Laser power
adjustment
3. Traverse
adjustment
4. Focus bias
adjustment
5. Error rate check
IC171
G
¬
¬¬
¬
¬
¬
GG
¬¬
¬¬
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.)
BD Board
D101 IC101, IC121, IC191
¬¬
¬
G
G
G
¬
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 the YES button and display “CREC IN”.
4. Press the YES 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.
— 14 —
Temperature Compensation Offset Adjustment
Laser Power 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 the YES button and select the “TEMP ADJUS” mode.
3. “TEMP = ” and the current temperature data will be
displayed.
4. To save the data, press the YES button.
When not saving the data, press the NO button.
5. When the YES 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”.
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 0 b utton
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 the YES 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 the YES 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
Digital voltmeter reading : Optical pick-up displayed value ± 10%
+ 0.2
– 0.3
mW
(Optical pick-up label)
KMS
210A
27X40
B0825
lop = 82.5 mA in this case
lop (mA) = Digital voltmeter reading (mV)/ 1 (Ω)
7. Press the YES 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
– 0.1
mW
9. Press the NO button and display “LDPWR ADJUS”, and stop
laser emission.
(The NO button is effective at all times to stop the laser
emission.)
— 15 —
Traverse Adjustment
Connection :
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 0 button or ) button and move the optical pickup 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)
A
VC
B
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.
A
VC
B
Specification A=B
(Traverse Waveform)
12. Press the YES b utton, 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.
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 wa veform of the oscilloscope
becomes the specified value.
(When the AMS 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)
A
VC
B
Specification A=B
(Traverse Waveform)
9. Press the YES 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
A
VC
B
Specification A=B
(Traverse Waveform)
17. Press the YES b utton, 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.
Oscilloscope
330k
BD board
TP (TEO)
TP (VC)
Ω
10pF
— 16 —
MDS-JA30ES
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 the YES 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 the YES 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 the YES 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 the C1 error rate changes, perform the adjustment using
the average value.
C1 error
220
Focus bias value
b
c
a
(F. BIAS)
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 the YES 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 the YES button twice and display “CPLAY MID”.
4. “C = AD = ” is displayed.
5. If the C1 error rate is below 50, check that ADER 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 the YES 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 the YES 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 50 and ADER is 00.
7. Press the YES button and display “ / b = ”.
Check that the C1 error is not below 220 and ADER is not
above 00 every time.
8. Press the YES 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.
Adjusting Points and Connecting Points
[BD BOARD] (SIDE A)
[BD BOARD] (SIDE B)
(IOP)
(I + 5V)
IC101
RV101
(VC)
IC171
D101
IC191
Note 1 : If the C1 error and ADER are above 00 at points a or b,
RV102
(TEO)
the focus bias adjustment may not have been carried out
properly. Adjust perform the beginning again.
IC121
— 17 — — 18 —
MDS-JA30ES
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM — BD SECTION —
HR901
OVER
WRITE
HEAD
OPTICAL PICK-UP BLOCK
(KMS-210A/J-N)
F
CB
J
D
E
PD
HIGH
POWER
LD
MOD
MOD
TRACKING
COIL
FOCUS
COIL
M101
SLED
M102
M
M
MOTOR
SPINDLE
MOTOR
IV-AMP
IV-AMP
6
A
L.F
H.F
I
2
2
2
2
VC
2
3
6
5
RV102
LASER
POWER
Q164
MODULE
SWITCH
TRK–
TRK+
FCS+
FCS–
SLED+
SLED–
SPDL+
SPDL–
BUFFER
BALANCE
Q162,163
APC
HF
IC172
1
7
6
VC
RV101
E-F
VC
D101
Q101
LASER ON
SWITCH
SLED/SPINDLE MOTOR DRIVE,
FOCUS/TRACKING COIL DRIVE
26
DRIVER
29
8
DRIVER
11
15
DRIVER
13
22
DRIVER
24
4
2
IC122
IC151
48
47
2
3
4
5
6
7
8
9
1
16
12
10
11
J
I
A
B
C
D
E
F
FI
FO
VC
TEMPR
TEMPI
PD
APCREF
46 45 44 43
RF AMP
IV AMP
IV AMP
+2.5V
GENERATOR
+5V
TEMP
AMP
APC
DIGITAL SIGNAL PROCESSOR,
DIGITAL SERVO SIGNAL PROCESSOR,
EFM/ACIRC ENCODER/DECODER
P-P
18
11
14
15
17
BOTM
PEAK
ABCD
ADFM
RF AMP
AUX
ADIN
THID
TENV
OVER WRITE
HEAD DRIVE
IC181
IC101
RF
41
34
38
39
37
FE
35
30
31
33
TE
26
SE
29
TLB
27
TFIL
25
23
22
Q181,182
HEAD
DRIVE
+5V
42
RF AGC
& EQ
SERIAL
PARALLEL
DECODER
XRST
SWDT
17
18 19 20
AUX
SW
PEAK &
BOTTOM
ABCD
AMP
FOCUS
ERROR
AMP
AT
AMP
TRACKING
ERROR
AMP
XLAT
SCLK
4
BPF
AAPC
DAPC
14 15
TFDR
31
TRDR
32
FRDR
5
FFDR
6
SFDR
17
SRDR
18
SPFD
19
SPRD
20
8
ADFG
4
IC102
2
3
9
19
1
5
VC
2
4
IC182
FILTER
SPFD
SPRD
5
2
4
IC121
EFMO
45
RFI
58
CLTV
60
FILI
62
PCO
61
FILO
63
94
93
BOTM
PEAK
ABCD
SCLK
XLAT
XRST
REC
SRDT
ADIP
DEMOD
SERVO
CONTROL
SERVO
AUTO
SEQUENCER
82
AUX
68
65
64
66
FE
67
TE
77
SE
76
VC
69VC
SWDT
8
9
10
16
24
11
DIRC
7
SUBCODE
PROCESSOR,
READER/
GENERATOR
MOD/DEMOD
TIMING
GENERATOR
4
DIGITAL
CLV
PROCESSOR
DECODER
ANALOG
MUX
CPU
IF
14
EFM
EFM
PLL
ADIP
SQSY
A/D
CONV
CONTROL
SENS
FILTER
52 49
51
53
DIFO
DIPD
DICV
DIFI
DIN
PLL
REGISTER
TIMING
GENERATOR
&
CLOCK
GENERATOR
PROCESSOR
APC
PWM
GEN
SERVO DSP/PWM GENERATOR
FOCUS/TRACKING/
SLED SERVO & PWM
6
SENS
12 85 86 87 89 91 92
TRDR
TFDR
FFDR
FRDR
6
SRDR
SFDR
15
DQSY
DIGITAL
AUDIO
IN/OUT
5
LD
20
21
DIN
DOUT
AUDIO
DATA
CONTROL
ECC
ENCODER
DECODER
32K RAM
DIDT
DODT
DTO
C2PO
BCK
LRCK
FS4
XTAI
DFCT
FOK
SHCK
OFTRK
COUT
WRPWR
LDDR
DTI
DOUT
28
27
30
29
31
32
33
90
35
3
2
4
98
99
6
84
S101
LIMIT IN
SW191
LOAD IN DET
SW192
LOAD OUT DET
SW193
HEAD DOWN
DET
SW194
HEAD UP DET
IC171
MEMORY
M191
LOADING MOTOR
M
M192
HEAD MOTOR
M
5
-1
-2
5 SDA
SDA
6
SCL
S102-1
PROTECT
S102-2
REFLECT
DODT
DATA
C2PO
L OUT
L IN
HU
HD
BCK
LRCK
SENS
SRDT
XLAT
SCLK
SWDT
SCTX
SQSY
512FS
DFCK
FOK
SHCK
FG
WRPWR
LIMIT
INSW
OUTSW
HDS
HUS
PROTECT
REFLECT
SCL
XRST
A
DIGITAL
SECTION
(Page 21)
CLOCK
DETECTOR
Signal Path
:
16
:
:
:
PB
REC
PB
REC
(Digital out)
(Digital in)
33
Q151
RESET
SWITCH
FS4
3
LDON
REC
MOD
— 19 — — 20 —
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
5
6 7 8 9
11
17
26
1
3 2
5
SWDT
SCK
XLAT
SRDT
SENSE
SCMD0
XINT
WRMN
XRST
AIRCPB
SCMD1
CLOCK
GENERATOR
4
4
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
3
SRDT
28 58
MOTOR
DRIVE
7
1
5
4
LOADING
MOTOR DRIVE
IC201
MOTOR
DRIVE
7
1
5
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
7475SDA
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
4
ROTARY
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
3
17
713
515
911
12 8
DATAO
18
2
DATA
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
4
1
10
13
IC354
1
22
51
52
PLL
Signal Path
PB
REC
PB
REC
(Digital out)
(Digital in)
:
:
:
:
6-2. BLOCK DIAGRAM — DIGITAL SECTION —
— 21 — — 22 —
MDS-JA30ES
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