Sony MDS-EX880 User manual

MICROFILM
SERVICE MANUAL
MINI DISC DECK
AEP Model
UK Model
MDS-EX880
E Model
Tourist Model
MDS-MS717
Model Name Using Similar Mechanism HCD-MD515
MD Mechanism Type MDM-C1C
Optical Pidk-up Name KMS-260A/J1N
SPECIFICATIONS
MDS-EX880/MS717
MDS-EX880/MS717 are the mini disc
deck section in DHC-EX880MD/MD717.
U.S and foreign patents licensed from Dolby
Laboratories Licensing Corporation.
Photo: MDS-MS717

– 2 –
This set can display the error history using the self disagnostic
function.
1. OPERATING THE ERROR HISTORY MODE
All operations are performed using the [=SELECTOR+]
dial and [PROGRAM] button.
1. Enter the test mode. (*1)
2. Turn the [=SELECTOR+] dial and display “ERR
DP MODE”.
3. Press the [ENTER/YES] button, therefor enter the error his-
tory mode and change the display “total rec”.
4. Press the [MENU/NO] button, therefor end the error history
mode and change the display “ERR DP MODE”.
(*1) See the “SECTION 4 TEST MODE” (page 11) for detail
of test mode.
2. OPERATING THE DISPLAYED HISTORYS
1. Turn the [=SELECTOR+] dial and change the dis-
play of error history contents.
2. Press the [PROGRAM] button and display error history func-
tion.
3. Press the [PROGRAM] button again and back the display of
error history contents.
Table 1 shows the history items and description.
Table 1.
(*2) For the desciption of each error, refer to Table 1-1.
(*3) If err refresh is performed, the error history data are all erased.
Only when “OP Replacement” was executed, perform this
operation to clear the error history data, otherwise, never per-
form this operation.
Display Description
(History items)
total rec Recording time (total hours of laser high
power. About 1/5 of actual recording
time) is displayed with “r h”.
total play Playing time (total hours of actual play-
ing time. Pause is not counted) is dis-
played with “p h”.
retry err Total retry counts of recording (r) and
playing (p) are displayed with “r
p”.
total err Total error count is displayed with “total
”.
err history Errors from last one “00” up to previous
10th error “09” are displayed with “0
E”. (*2) (To select error No., use
[=SELECTOR+] dial.)
er refresh?
err refresh (*3) Press [RECIT] button, and “Complete!”
is displayed and the error history are all
erased.
Table 1-1.
Display Description
(error No./code)
0E00 No error
0E01 Disc error PTOC does not read
0 E02 Disc error UTOC does not read
0E03 Loading error
0E04 Address does not read
0E05 Out of FOK
0E06 Focus does not work
0 E07 Retry of record
0 E08 Record retry error
0E09 Retry of Playback
0E0A Playback retry error
SELF DIAGNOSTIC FUNCTION

– 3 –
The laser diode in the optical pick-up block may suffer electro-
static 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
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the 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.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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 PUB-
LISHED BY SONY.
SECTION 1
SERVICING NOTES
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
The following caution label is located inside the unit.
TABLE OF CONTENTS
SELF DIAGNOSTIC FUNCTION................................ 2
1. SERVICING NOTES ............................................... 3
2. GENERAL ................................................................... 5
3. DISASSEMBLY ......................................................... 6
4. TEST MODE.............................................................. 11
5. ELECTRICAL ADJUSTMENTS......................... 14
6. DIAGRAMS
6-1. Block Diagram – MD SERVO Section – ....................... 19
6-2. Block Diagram – MAIN Section – ................................. 21
6-3. Printed Wiring Boards – BD Section – ......................... 24
6-4. Schematic Diagram – BD Section – ............................... 27
6-5. Schematic Diagram – MAIN Section –.......................... 32
6-6. Printed Wiring Board – MAIN Section – ....................... 37
6-7. Printed Wiring Boards
– MOTOR/SENSOR Section –....................................... 39
6-8. Schematic Diagram
– MOTOR/SENSOR Section –....................................... 41
6-9. Printed Wiring Boards – PANEL Section – ................... 43
6-10. Schematic Diagram – PANEL Section – ........................ 45
6-11. IC Pin Function Description ........................................... 55
7. EXPLODED VIEWS................................................ 65
8. ELECTRICAL PARTS LIST ............................... 70
CAUTION : INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL : USYNLIG LASERSTRÅLING VED ÅBNING NÅR
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE
FOR STRÅLING.
VORSICHT : UNSICHTBARE LASERSTRAHLUNG, WENN
ABDECKUNG GEÖFFNET UND SICHEREITSVERRIEGELUNG
ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN.
VARO ! :AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT-
TIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.
VARNING : OSYNLING LASERSTRÅLING NÄR DENNA DEL ÄR ÖPPNAD
OCH SPÄRREN ÄR URKOPPLAD.BETRAKTA EJ STRÅLEN.
ADVERSEL : USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG
SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.
VIGYAZAT ! :A BURKOLAT NYITÁSAKOR LÁTHATATLAN LÉZERSU-
GÁRVESZÉLY
! KERÜLJE A BESUGÁRZÁST !

– 4 –
POWER SUPPLY DURING SERVICING
• As this set has not own power supply, it does not operate inde-
pendently. Therefore, during servicing, connect it to the Pre-Main
amplifierUnit(TA-EX880/MS717) ofDHC-EX880MD/MD717.
Also, connect the Tuner Unit (ST-EX880/MS717) because the
POWER switch is not provided to the Pre-Main amplifier Unit
(TA-EX880/MS717).
If TA-EX880/MS717 and ST-EX880/MS717 are not available,
use the Power Feed Jig (PFJ-1).
In this case, turn on the POWER switch on the Power Feed Jig,
then press pbutton and [DISPLAY] button on the set simul-
taneously, so that the power is supplied.
Connection:
AGING MODE
In the AGING mode, the MD operation can be checked.
• If an error occurs:
The aging operation stops.
• If no error occurs:
The aging operation continues repeatedly.
1. Operating Method for AGING Mode with the system power
turned on, press the [POWER] button while pressing the
[MENU/NO] buttonand [STEREO/MONO] buttonontheTuner
Unit (ST-EX880/MS717) simultaneously, so that the AGING
mode becomes active.
To exit from the AGING mode, press the [POWER] button,
and turn off the power.
Set
Pre-Main AMP
Unit
(TA-EX880/MS717)
Tuner Unit
(ST-EX880/MS717)
AC IN
AC IN jack
Connector cable (17P)
(attached to the set)
SYSTEM CONTROL terminal
SYSTEM CONTROL terminal
SYSTEM CONTROL terminal
AC plug cord
Power feed jig
(PFJ-1) P707, 909
CDP/TC
CN308 (17P)
SYSTEM CONTROL terminal
Set
Connector cable (17P)

– 5 –
SECTION 2
GENERAL
LOCATION OF CONTROLS
• Front view
• Rear view
1SHUFFLE button
2CONTINUE button
3DISC SKIP button
4REPEAT button
5DIGITAL IN, ANALOG IN, MONO indicators
6REC LEVEL knob
7MD 1 to 3 indicators
8Disc slots door (PUSH OPEN)
9§button
0Disc stots
!¡ MD 1 to 3 buttons
!™ REC 1 to 3 buttons
!£ =SELECTOR +knob
!¢ ENTER/YES button
!∞ MENU/NO button
!§ pbutton
!¶ flbutton
!• Fluorescent indicator tube
!ª 0, ←and ), →buttons
@º REC IT button
@¡ CD SYNC button
@™ DISPLAY button
@£ PROGRAM button
1ANALOG IN terminal
2ANALOG OUT terminal
3OPTICAL DIGITAL IN, CD PLAYER terminal
4OPTICAL DIGITAL IN, VIDEO 1 terminal (MDS-EX880)
4OPTICAL DIGITAL IN, CS/BS terminal (MDS-MS717)
5OPTICAL DIGITAL IN, VIDEO 2 terminal (MDS-EX880)
5OPTICAL DIGITAL IN, LD/DVD terminal (MDS-MS717)
6SYSTEM CONTROL terminal

– 6 –
CASE, FRONT PANEL SECTION
MD MECHANISM DECK SECTION (MDM-C1C)
Note: Follow the disassembly procedure in the numerical order given.
SECTION 3
DISASSEMBLY
1 two screws
(CASE3 TP2)
4 wire (flat type) (11 core)
(CN301)
3 connector
(CN306)
1 two screws
(CASE3 TP2
)
2 case
5 three screws
(BVTP3
× 10)
7 front panel section
6 two claws
4 wire (flat type) (9 core)
(CN305)
4 wire (flat type) (13 core) (160 mm)
(CN302)
6 two claws
1 wire (flat type) (23 core)
(CN304)
2 two screws
(BVTT3
× 6)
1 wire (flat type) (17 core)
(CN303)
3 MD mechanism deck section
(MDM-C1C)
2 two screws
(BVTT3
× 6)

– 7 –
HOLDER (FN), CHASSIS (TOP)
Note: Pull up the lever (S) ass’y and set to bracket (3),
then slide them in the arrow direction.
1 four screws
(BVTT2.6
× 5
)
2 holder (FN)
0 chassis (TOP)
6 two screws
(P2
× 5)
9 bracket (3)
7 screw (BVTT2.6 × 5)
3 two screws (BVTT2.6 × 5)
8 lever (S) ass’y
5 wire (flat type) (7 core)
(CNP15)
5 wire (flat type) (13 core)
(185 mm) (CNP12)
4 cover (FFC)
bracket (3)
screw (BVTT2.6
× 5)
lever (S) ass’y

– 8 –
CHASSIS (ELEVATOR) (NEW) ASS’Y
MOTOR (HEAD) ASS’Y (M905)
1 Remove the chassis (elevator) (new) ass’y
to the direction of the arrow.
B
A
5
two precision screws
(P2
× 2)
4 Remove the chassis (head gear) ass’
y
to direction of the arrow A .
6 Remove the motor (head) ass’y (M905)
to direction of the arrow
B .
1 connector
(CNP19)
7 Remove two solders of motor (M905).
2 belt (A)
3 screw
(BVTT2.6
× 5)
6 MOTOR RELAY board

– 9 –
BASE UNIT SECTION (MBU-C1P)
BD BOARD
Lift up the over write head carefully
not to touch.
chassis (elevator)
2 base unit
(MBU-C1P
)
1 two step screws
over write head
3 connector
(CN108)
1 two step screws
3 screw
(BTP2
× 6)
4 BD board
5 OP translation flexible boar
d
(CN101)
1 two connectors
(CN104, 109)
2 two precision screws
(P1.7
× 2.5)

– 10 –
OVER WRITE HEAD (HR901)
OPTICAL PICK-UP (KMS-260A/J1N)
2 over write head (HR901
)
1 precision screw
(P1.7
× 2.5)
3 shaft (MAIN)
2 stopper
1 special screw
(M1.7
× 1.4)
4 Remove the optical pick-up (KMS-260A/J1N)
to direction of the arrow.

– 11 –
1. PRECAUTIONS FOR USE OFTEST MODE
1. The erasing-protection tab is not detected in the test mode.
Therefore, operating in the recording laser emission mode and
pressing the [REC1] button, 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.
But “CREC MODE”, “EF MO CHECK” and “EF MO AD-
JUST” is detect the erasing-protection tab and recording laser
power off.
2. Using MD slot is “MD1” only.
1-1. Recording Laser Emission Mode and Operating
Button
1. Continuous recording mode (CREC MODE)
2. Traverse adjustment mode (EF MO ADJUST)
3. Laser power adjustment mode (LDPWR ADJUST)
4. Laser power check mode (LDPWR CHECK)
5. When pressing the [REC1] button.
6. Traverse checking mode (EF MO CHECK)
2. SETTING THE TEST MODE
1. Turn on the set, and select the MD function.
2. Place the MD in “NO DISC” status (No disc present in stocker
and inside of set)
3. Press [DISPLAY] button, [MD1] button, and pbutton simul-
taneously to activate the Test mode.
When the Test mode is activated. “TEMP CHECK” is dis-
played on fluorescent indicator tube.
3. LOADING/UNLOADING A DISC INTEST MODE
1. In the Test mode, use the slot 1 only. (Do not load a disc in
other slots.)
2. When a disc is loaded in slot 1, in several seconds it will be
automatically pulled in.
3. To unload a disc, press §button .
4. To load a disc again, press §button .
5. In the Test mode, MD1, 2, 3 LEDs do not light regardless of
whether a disc is present or not.
4. RELEASING THE TEST MODE
Press the [REPEAT] button, and the set returns to normal mode.
(If [REPEAT] button is pressed with a disc loaded, the disc is
automatically ejected.)
5. BASIC OPERATIONS OFTHETEST MODE
All operations are performed using the [=SELECTOR+]
dial, [ENTER/YES] button, and [MENU/NO] button. The func-
tions of these buttons and dial are as follows.
Table 1.
Button & dial Function
=SELECTOR +dial Changes parameters and modes.
ENTER/YES button Proceeds onto the next step.
Finalizes input.
MENU/NO button Returns to previous step.
Stops operations.
SECTION 4
TEST MODE
6. SELECTINGTHETEST MODE
Twenty six test modes are selected by turn the
[=SELECTOR+] dial.
Table 2.
• For detailed description of each adjustment mode, refer to the
“5. ELECTRICAL ADJUSTMENTS” (page 14).
• If a different adjustment mode has been selected by mistake,
press the [MENU/NO] button to exit from it.
*1: Scurve CHECK, VERIFY CHECK, EEP MODE, MANUAL
CMD, SVDATA READ, SLED MOVE, ACCESS MODE,
0920 CHECK, WRITE sure?, HEAD ADJUST,
CPLAY2MODE, and CREC2MODE are not used in servic-
ing. If set accidentally, press the [MENU/NO] button immedi-
ately to exit it.
Display Contents
TEMP CHECK Temperature compensation offset check
LDPWR CHECK Laser power check
EF MO CHECK Traverse (E-F balance) check
EF CD CHECK Travers (Pre mastered disk) check
FBIAS CHECK Focus bias check
CPLAY MODE Continuous playback mode
CREC MODE Continuous recording mode
ScurveCHECK S-curve check (*1)
VERIFYMODE Non-volatile memory check (*1)
DETRK CHECK Detrack check
TEMP ADJUST Temperature compensation offset adjust-
ment
LDPWR ADJUST Laser power adjustment
EF MO ADJUST Traverse (E-F balance) adjustment
EF CD ADJUST Traverse (Pre mastered disk) adjustment
FBIAS ADJUST Focus bias adjustment
EEP MODE Non-volatile memory mode (*1)
MANUAL CMD Manual command transfer mode (*1)
SVDATA READ Data reading out mode (*1)
ERR DP MODE Operation of error histories memory
SLED MOVE Operation of sled motor (*1)
ACCESS MODE Access check (*1)
0920 CHECK Outermost periphery check (*1)
WRITE sure? Non-volatile memory initialize (*1)
HEAD ADJUST HEAD adjustment check (*1)
CPLAY2MODE Continuous playback mode (*1)
CREC2MODE Continuous recording mode (*1)

– 12 –
7. OPERATING THE CONTINUOUS PLAYBACK
MODE
7-1. Entering the Continuous Playback Mode
1. Set the disc in the slot 1 of unit. (In several seconds it will be
automatically pulled in.) (Whichever recordable discs or discs
for playback only are available.)
2. Turn the [=SELECTOR+] dial and display “CPLAY
MODE”.
3. Press the [ENTER/YES] button to change the display to
“CPLAY MID”.
4. When access completes, the display changes to
“C = AD = )”.
Note: The numbers “ ” displayed show you error rates andADER.
7-2. Changing the Parts to be Played-back
1. Press the [ENTER/YES] button during continuous playback
to change the display as below.
2. When access completes, the display changes to
“C = AD = )”.
Note: The numbers “ ” displayed show you error rates andADER.
7-3. Ending the Continuous Playback Mode
1. Press the [MENU/NO] button. The display will change to
“CPLAY MODE”.
2. Press the §button and remove the disc. (To exit from the
TEST mode, press the [REPEAT] button.)
Notes:
1. The playback start address for IN, MID, and OUT are as follows.
IN : 40h cluster
MID : 300h cluster
OUT : 700h cluster
In case you want to display the address of the playback position on
the display, press the [DISPLAY] button and display “CPLAY
()”.
2. The [MENU/NO] button can be used to stop playing anytime.
8. OPERATINGTHE CONTINUOUS RECORDING
MODE
8-1. Entering the Continuous Recording Mode
1. Set the MO disc in the slot 1 of unit. (Refer to note 3.)
2. Turn the [=SELECTOR+] dial and display “CREC
MODE”.
3. Press the [ENTER/YES] button to change the display to “CREC
MID”.
4. When access completes, the display changes to “CREC
()” and [PROGRAM] LED lights up.
Note: The numbers “ ” displayed shows you the recording position ad-
dress.
8-2. Changing the Parts to be Recorded
1. When the [ENTER/YES] button is pressed during continuous
recording, the display changes as below. (“PROGRAM”
indication turns off during change-over of display.)
2. When access completes, the display changes to “CREC
()” and [PROGRAM] LED lights up.
Note: The numbers “ ” displayed shows you the recording position ad-
dress.
8-3. Ending the Continuous Recording Mode
1. Press the [MENU/NO] button. The display will change to
“CREC MODE” and [PROGRAM] LED goes off.
2. Press the §button and remove the disc.
Notes:
1. The recording start address for IN, MID, and OUT are as follows.
IN : 40h cluster
MID : 300h cluster
OUT : 700h cluster
2. The [MENU/NO] button can be used to stop recording anytime.
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.
4. Do not perform continuous recording for long periods of time above
5 minutes.
5. During continuous recording, be careful not to apply vibration.
9. EEP MODE
This mode reads and writes the contents of the non-volatile
memory.
It is not used in servicing. If set accidentally, press the
[MENU/NO] button immediately to exit it.
CPLAY MID CPLAY OUT CPLAY IN
CREC MID CREC OUT CREC IN

– 13 –
10. FUNCTIONS OF OTHER BUTTONS
Table 3.
Note: The erasing-protection tab in not detected during the test mode.
Recording will start regardless of the position of the erasing-pro-
tection tab when the [REC1] button is pressed.
11. TEST MODE DISPLAYS
Each time the [DISPLAY] button pressed, the display changes in
the following order.
Note: Auto gain display and IVR display are not used in servicing.
Button Contents
fl
Sets continuous playback when pressed in the
STOP state.(servo all on)
When pressed during continuous playback, the
tracking and sled servo turns on/off.
pStop continuous playback and continuous re-
cording. (servo all off)
)The sled moves to the outer circumference only
when this is pressed.
0The sled moves to the inner circumference only
when this is pressed.
REC1 Turns recording on/off when pressed during
continuous playback.
SHUFFLE Switches between the pit and groove modes
when pressed.
CONTINUE Switches between the CLV-S (pull-in mode) and
CLV-A (playing servo) modes when preseed.
(Switches the spindle servo mode.)
DISPLAY Switches the display when pressed.
Returns to previous step. Stop operations.
REPEAT Releasing the test mode
§Disc eject
Mode
display Error rate display
Address display
ADIP address
display SUB Q address display
Auto gain
display IVR
display
Change over the display with the
SHUFFLE button.
1. MODE display
Displays “TEMP ADJUST”, “CPLAY MODE”, etc..
2. Error rate display
Error rates are displayed as follows.
C = AD =
C = : Indicates C1 error
AD = : Indicates ADER
3. Address display
Address are displayed as follows.
h = a = (MO groove)
With this display, if [SHUFFLE] button is pressed, the fol-
lowing will be displayed.
h = s = (MO pit and CD)
h = : Header address
a = : ADIP address
s = : SUB Q address
Note: “—” is displayed when the address cannot be read.
4. Auto gain display
Auto gain are displayed as follows.
AG = / [ ]
A B C
A = Focus servo gain coefficient
B = Tracking servo gain coefficient
C = [OK] or [NG] or [ - -] (not converged)
12. MEANINGS OF OTHER DISPLAYS
Table 4.
Display Contents
Light Off Blinking
CONTINUE During continuous Stop state
LED playback (servo all off) —
(servo all on)
PROGRAM Recording Recording —
LED mode on mode off
DIGITAL CLV lock state CLV unlock state —
IN LED
ANALOG Pit mode Groove mode —
IN LED
MONO High reflection Low reflection —
LED rate disc rate disc
REC IT Spindle servo Spindle servo
LED CLV-S CLV-A —
(pull-in mode) (playing mode)
CD SYNC ABCD adjustment Not adjustment —
LED completed
Focus auto gain Focus auto
ALL1 successful — gain
successful.
Tracking auto gain Tracking
DISCS successful — auto
gain failed.

– 14 –
SECTION 5
ELECTRICAL ADJUSTMENTS
1. PRECAUTIONS FOR CHECKING LASER DI-
ODE EMISSION
To check the emission of the laser diode during adjustments, never
view directly from the top as this may lose your eyesight.
2. PRECAUTIONS FOR USE OF OPTICAL
PICK-UP (KMS-260A)
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 con-
necting the connector, be careful not to remove the solder. Also
tale adequate measures to prevent damage by static electricity.
Handle the flexible board with care as it breaks easily.
Optical pick-up flexible board
3. PRECAUTIONS FOR ADJUSTMENTS
1) When replacing the following parts, perform the adjustments
and checks with ®in the order shown in the following table.
Table 1.
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.
• Test disc (CD for playback only) TDYS-1
(Parts No. 4-963-646-01)
• Laser power meter LPM-8001
(Parts No. J-2501-046-A)
• Oscilloscope (Measure after preforming CAL of prove.)
• Digital voltmeter
• Thermometer
5) When observing several signals on the oscilloscope, etc., make
sure that VC and ground do not connect inside the oscillo-
scope.
(VC and ground will become short-circuited)
4. CREATING MO CONTINUOUSLY RECORDED
DISC
* This disc is used in focus bias adjustment and error rate check.
The following describes how to create a MO continuous record-
ing disc.
1. Insert a MO disc (blank disc) commercially available to slot 1.
2. Turn the [=SELECTOR+] dial and display “CREC
MODE”.
3. Press the [ENTER/YES] button and display “CREC MID”.
“CREC (0300)” is displayed for a moment and recording starts.
4. Complete recording within 5 minutes.
5. Press the [MENU/NO] button and stop recording.
6. Press the §button and remove the MO disc.
(To exit from the TEST mode, press the [REPEAT] button.)
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.
Pick-up
Laser tap
Flexible board
Optical BD board
Pick-up IC171 D101 IC101, IC121, IC192
1. Temperature
compensation ×®® ®
offset adjustment
2. Laser power ®®×®
adjustment
3. Traverse ®®×®
adjustment
4. Focus bias ®®×®
adjustment
5. Error rate check ®®×®

– 15 –
5. TEMPERATURE COMPENSATION OFFSET
ADJUSTMENT
Save the temperature data at that time in the non-volatile memory
as 25°C reference data.
Notes:
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 tem-
perature of this part has become the ambient temperature.
Adjusting Method:
1. Turn the [=SELECTOR+] dial and display “TEMP
ADJUST”.
2. Press the [ENTER/YES] button and select the “TEMP AD-
JUST” mode.
3. “TEMP = ” and the current temperature a data will be dis-
played.
4. To save the data, press the [ENTER/YES] button.
When not saving the data, press the [MENU/NO] button.
5. When the [ENTER/YES] button is pressed, “TEMP =
SAVE” will be displayed for some time, followed by “TEMP
ADJUST”.
When the [MENU/NO] button is pressed, “TEMP ADJUST”
will be displayed immediately.
Specifications:
The temperature should be within “E0-EF”, “F0-FF”, “00-0F”,
“10-1F” and “20-2F”.
6. LASER POWER ADJUSTMENT
Preparation:
Referring to “3. Disassembly”, remove the Base Unit from MD
Mechanism Deck.
Connection:
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 )button
or 0button and move the optical pick-up.)
Connect the digital voltmeter to TP29 (IOP+) and TP30
(IOP–) of the BD board.
2. Turn the [=SELECTOR+] dial and display “LDPWR
ADJUST”.
(Laser power: for adjustment)
3. Press the [ENTER/YES] button and display “LD 0.9 mW $
”.
4. Turn the [=SELECTOR+] dial so that the reading
of the laser power meter becomes 0.82 to 0.93 mW.
Set the range control on the laser power meter to 10 mW, then
press the [ENTER/YES] button to save the adjustment result
in the non- volatile memory.
(“LD SAVE $ ” will be displayed for a moment.)
5. Then “LD 7.0 mW $ ”will be displayed.
6. Turn the [=SELECTOR+] dial so that the reading
of the laser power meter becomes 6.9 to 7.1 mW, press the
[ENTER/YES] button and save the adjustment result in the
nonvolatile memory.
(“LD SAVE $ ” will be displayed for a moment.)
Note: Do not perform the emission with 7.0 mW more than 15 seconds
continuously.
7. Turn the [=SELECTOR+] dial and display “LDPWR
CHECK”.
8. Press the [ENTER/YES] button and display “LD 0.9 mW $
”. Check that the reading of the laser power meter becomes
0.80 to 0.96 mW.
9. Press the [ENTER/YES] button and display “LD 7.0 mW $
”. Check that the reading of the laser power meter and digi-
tal voltmeter satisfy the specified value.
Specification:
Laser power meter reading: 7.0 ± 0.2 mW
Digital voltmeter reading : Optical pick-up displayed value
±10%
10. Press the [MENU/NO] button and display “LDPWR CHECK”,
and stop the laser emission.
(The [MENU/NO] button is effective at all times to stop the
laser emission.)
Optical pick-up
objective lens
laser
power mete
r
+
–
BD board
digital voltmeter
TP29 (IOP +)
TP30 (IOP –)
KMS260A
27X40
B0567
lOP=56.7 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 (
Ω )
(Optical pick-up label)

– 16 –
7. TRAVERSE (E-F BALANCE) ADJUSTMENT
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.
Connection:
Adjusting Method:
1. Connect an oscilloscope to TP69 (TEO) andTP58 (VC) of the
BD board.
2. Load a MO disc (any available on the market) to slot 1. (Refer
to note 1.)
3. Press the )button and move the optical pick-up outside
the pit.
4. Turn the [=SELECTOR+] dial and display “EFMO
ADJUST”.
5. Press the [ENTER/YES] button and display “EFB = MO-
R”.
(Laser power READ power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
6. Turn the [=SELECTOR+] dial so that the waveforms
of the oscilloscope becomes the specified value. (When the
[=SELECTOR+] dial is turned , the “ ” of “EFB
= MO-R” changes and the waveform changes.)
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
(MO read power traverse adjustment)
(Traverse Waveform)
7. Press the [ENTER/YES] button, and save the result of adjust-
ment to the non-volatile memory.
(“EFB = SAVE” will be displayed for a moment. Then
“EFB = MO-W” will be displayed.)
8. Turn the [=SELECTOR+] dial so that the waveforms
of the oscilloscope becomes the specified value. (When the
[=SELECTOR+] dial is turned, the “ ” of “EFB
= MO-W” changes and the waveform changes.)
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
(MO write power traverse adjustment)
(Traverse Waveform)
9. Press the [ENTER/YES] button, and save the result of adjust-
ment to the non-volatile memory.
(“EFB = SAVE” will be displayed for a moment. Then
“EFB = MO-P” will be displayed.)
10. The optical pick-up moves to the pit area automatically and
servo is imposed.
11. Turn the [=SELECTOR+] dial until the waveforms
of the oscilloscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
(Traverse Waveform)
12. Press the [ENTER/YES] button, and save the result of adjust-
ment to the non-volatile memory.
(“EFB = SAVE” will be displayed for a moment. Then
“EF MO ADJUST” will be displayed.)
The disc stops rotating automatically.
13. Press the [REPEAT] button and remove the MO disc.
14. Set the test mode again and load the test disc TDYS-1 to slot
1.
15. Turn the [=SELECTOR+] dial and display “EF CD
ADJUST”
16. Press the [ENTER/YES] button and display “EFB = CD”.
Servo is imposed automatically.
17. Turn the [=SELECTOR+] dial until the waveforms
of the oscilloscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
(Traverse Waveform)
18. Press the [ENTER/YES] button, and save the result of ad-
justment to the non-volatile memory.
(“EFB = SAVE” will be displayed for a moment. Then
“EF CD ADJUST” will be displayed.)
19. Press the §button and remove the test disc TDYS-1.
+
–
oscilloscope
(DC range)
10 pF
330 k Ω
TP69 (TEO)
TP58 (VC)
BD board
+
–
BD board
TP69 (TEO)
TP58 (VC)
oscilloscope
(DC range)
V: 0.1 V/div
H: 10 ms/div
A
B
VC
specification: A=B
A
B
VC
specification: A=B
A
B
VC
specification: A=B
A
B
VC
specification: A=B

– 17 –
8. FOCUS BIAS ADJUSTMENT
Adjusting Method:
1. Load a continuously recorded disc (Refer to “4. Creating MO
Continuously Recorded Disc”) to slot 1.
2. Turn the [=SELECTOR+] dial and display “CPLAY
MODE”.
3. Press the [ENTER/YES] button and display “CPLAY MID”.
4. Press the [MENU/NO] button when “C = AD = )” is
displayed.
5. Turn the [=SELECTOR+] dial and display “FBIAS
ADJUST”.
6. Press the [ENTER/YES] button and display “ / a =
”.
The first four digits indicate the C1 error rate, the two digits
after [/] indicateADER, and the 2 digits after [a=] indicate the
focus bias value.
7. Turn right the[=SELECTOR+] dial and find the focus
bias value at which the C1 error rate becomes 220. (Refer to
note 2.)
8. Press the [ENTER/YES] button and display “ / b =
”.
9. Turn left the [=SELECTOR+] dial and find the fo-
cus bias value at which the C1 error rate becomes 220. (Refer
to note 2.)
10. Press the [ENTER/YES] button and display “ / c =
”.
11. Check that the C1 error rate is below 50 andADER is 00.
Then press the [ENTER/YES] button.
12. If the “( )” in “ - - ( )” is above 20, press the
[ENTER/YES] button.
If below 20, press the [MENU/NO] button and repeat the ad-
justment from step 2 again.
13. Press the [REPEAT] button and press the §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 auto-
matically calculated from points a and b.
Note 2:As the C1 error rate changes, perform the adjustment using the
average vale.
9. ERROR RATE CHECK
9-1. CD Error Rate Check
Checking Method:
1. Load a test disc TDYS-1 to slot 1.
2. Turn the [=SELECTOR+] dial and display “CPLAY
MODE”.
3. Press the [ENTER/YES] button and display “CPLAY MID”.
4. “C = AD = )” is displayed.
5. Check that the C1 error is below 20.
6. Press the [MENU/NO] button, stop playback, press the
[REPEAT] button, and remove the test disc.
9-2. MO Error Rate Check
Checking Method:
1. Load a continuously recorded disc (Refer to “4. Creating MO
Continuously Recorded Disc”) to slot 1.
2. Turn the [=SELECTOR+] dial and display “CPLAY
MODE”.
3. Press the [ENTER/YES] button and display “CPLAY MID”.
4. “C = AD = )” is displayed.
5. If the C1 error is below 50, check that ADER is 00.
6. Press the [MENU/NO] button, stop playback, press the §
button, and remove the continuously recorded disc.
(To exit from the TEST mode, press the [REPEAT] button.)
10. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Method:
1. Load a continuously recorded disc (Refer to “4. Creating MO
Continuously Recorded Disc”.).
2. Turn the [=SELECTOR+] dial and display “CPLAY
MODE”.
3. Press the [ENTER/YES] button and display “CPLAY MID”.
4. Press the [MENU/NO] button when “C = AD = )” is
displayed.
5. Turn the [=SELECTOR+] dial and display “FBIAS
CHECK”.
6. Press the [ENTER/YES] 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 and ADER is 02.
7. Press the [ENTER/YES] button and display “ / b =
”.
Check that the C1 error is not below 220 and ADER is not
above 02 every time.
8. Press the [ENTER/YES] button and display “ / a =
”.
Check that the C1 error is not below 220 and ADER is not
above 02 every time.
9. Press the [MENU/NO] button, next press the §button, and
remove the continuously recorded disc.
Note 1:If the C1 error andADER are above 02 at points a or b, the focus
bias adjustment may not have been carried out properly. Adjust
perform the beginning again.
C1 error
220
bca
Focus bias value
(F. BIAS)

– 18 –
11. ADJUSTING POINTS AND CONNECTING
POINTS
[BD BOARD] – SIDE A –
[BD BOARD] – SIDE B –
CN101
D101
CN107 GND
IC316
IC121
TP95
(RF)
TP68
(FE)
TP69
(TEO)
TP30
(IOP–)
TP29
(IOP+)
TP58
(VC)
IC101

– 19 – – 20 –
MDS-EX880/MS717 SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM – MD SERVO Section –
F
C B
D A
E
I J
J
I
B
A
C
D
E
F
DETECTOR
1
2J
I
4
5
6
7
A
B
C
D
8
9
E
F
LDPD
LASER DIODE
ILCC
PD
OPTICAL PICK-UP
(KMS-260A/J1N)
AUTOMATIC
POWER
CONTROL
Q162, 163
LASER ON
SWITCH
Q101
OVER WRITE
HEAD DRIVE
IC181, Q181, 182
HF MODULE
SWITCH
Q102 – 104, 113
11
10
APC
PD
LD/PD
AMP
APCREF
I-V
AMP
I-V
AMP
AT
AMP B.P.F. 29 30
WBL
ADFM ADIN 32
ADFG
ABCD
AMP FOCUS
ERROR AMP
TRACKING
ERROR AMP
35
34
26
28
ABCD
FE
TE
SE
V-I
CONVERTER
20
F0CNT WBL
3T EQ
SERIAL/
PARALLEL
CONVERTER,
DECODER
COMMAND
1716 18
SWDT
SCLK
XLAT
RF AMP
B.P.F.
46
RFO 40 RF AGC
& EQ
AGCI
EQ
38
RF
RF AMP,
FOCUS/TRACKING ERROR AMP
IC101
TEMP
48 47
MORFO
MORFI
3T PEAK &
BOTTOM
WBL 33
AUX
62
37
PEAK
36
BOTM
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC152
6
8OUT4F OUT4R
M
M901
(SPINDLE)
27
25 OUT2F OUT2R
M
M902
(SLED)
21
23 OUT1F OUT1R
12
10 OUT3F OUT3R
FCS+
FCS–
TRK+
TRK–
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
3
4
IN4R
IN4F
29
30
IN2F
IN2R
19
18
IN1F
IN1R
14
15
IN3F
IN3R
MOD
SPFD
SPRD
92
91
88
89
86
85
APCREF
SFDR
SRDR
FFDR
FRDR
TFDR
TRDR
16PSB
PWM GENERATOR
AUTOMATIC
POWER
CONTROL
DIGITAL
SERVO
SIGNAL
PROCESS
74
65
64
66
75
ANALOG MUX
A/D CONVERTER
AUTO
SEQUENCER
FROM CPU
INTERFACE
DIGITAL SERVO
SIGNAL PROCESSOR
IC121 (2/2)
RECP
+3.3V
AUX2 AUX1
ABCD
FE
TE
SE
PEAK
BOTM
81
80
82
XLRF
CKRF
DTRF
XLAT
SCLK
SWDT
PLL
FILTER
59
58
61
60
FILI
PCO
CLTV
FILO
100
EFMO 23
ADDT
IC121 (1/2)
15TX
51
52
55
ASYO
ASYI
RFI
SCTX
HR901
OVER WRITE HEAD
ADIP
DEMODULATOR/
DECODER
78
ADFG
SPINDLE
SERVO
F0CNT
94 93
SPFD SPRD
SUBCODE
PROCESSOR
SAMPLING
RATE
CONVERTER
DIGITAL
AUDIO
INTERFACE 22
21
DIN
DOUT
DIGITAL SIGNAL PROCESSOR,
EFM/ACIRC ENCODER/DECODER,
SHOCK PROOF MEMORY CONTROLLER,
ATRAC ENCODER/DECODER, 2M BIT D-RAM
IC121 (1/2)
DADT
INTERNAL BUS
D-RAM CLOCK
GENERATOR
25
26 27
XBCK LRCK
FS256
X100
22.5792MHz
OSCI
OSCO
CPU
INTERFACE MONITOR CONTROL
10
XRST
12
DQSY
11
SQSY
14
XINT
9 8 5 6 7
SENS SRDT SWDT SCLK XLAT
1 2 3 4
MNT0 MNT1 MNT2 MNT3
FOK
SHOCK
XBUSY
SLOCK
SWDT
SCLK
XLAT
40
35 37 38 48 47 46 45
MNT0 MNT1 MNT2 MNT3
DIG-RST
SQSY
DQSY
LDON
WRPWR
MOD
XINT
SENS
SRDT
75 76
HEAD UP
HEAD DOWN
45
6
5
05
17
M
FIN RIN
SDA
SCL
OUT1 OUT2
OVER WRITE HEAD
UP/DOWN
MOTOR DRIVE
IC172
EEPROM
IC171
M905
(OVER WRITE HEAD UP/DOWN)
XIN
SDA
SCL
XOUT
X302
7MHz
47, 46, 48, 49
1, 2, 18, 19
D0 – D3
32 – 29, 34 – 38, 43
6 – 9, 11 – 15, 5
A00 – A09
D0 – D3A00 – A09
41 16
45 3
44 4
42 17
XOE
XWE
XRAS
XCAS
XOE
XWE
XRAS
XCAS
D-RAM
IC124
MD MECHANISM CONTROLLER
IC316 (1/2)
73
13 63
50
79
83
12
HF MODULE
16
17
C
(Page 21)
B
(Page 21)
A
(Page 21)
(Page 21)
D
523 41 36
20
49
44
15
13
79
SCTX
80
42
REFLECT
54
HEAD SW DOWN
PROTECT S683
(PROTECT)
74
55 S682
(REFLECT)
59
73
LIMIT-IN
HEAD SW UP
S681
(LIMIT IN)
•SIGNAL PATH
: MD PLAY
: MD REC (ANALOG INPUT)
: MD REC (DIGITAL INPUT)
COMPA-
RATOR
EFM/ACIRC
ENCODER/DECODER
SHOCK PROOF
MEMORY CONTROLLER
ATRAC
ENCODER/DECODER
24
S6
OVER WRITE HEAD
UP DETECT
S7
OVER WRITE HEAD
DOWN DETECT

– 21 – – 22 –
6-2. BLOCK DIAGRAM – MAIN Section –
05
MASTER CONTROLLER
IC305
LOADING
MOTOR DRIVE
IC308
ELEVATOR
UP/DOWN
MOTOR DRIVE
IC309
CLOCK IN
BUS BUSY
CLOCK OUT
DAT0 DAT1
DAT3
DAT2
1234
SYSTEM-RST
PWR-DWN 12
19
RESET
SWITCH
Q402
MD MECHANISM CONTROLLER
IC316 (2/2)
EMP 7
AD-EN 25
DA-EN 24
IN1
IN2 IN1
IN2
OUT1
M903
(LOADING)
OUT2
OUT1
OUT2
3
2
3
2
11
X402
5MHz
X2
X1
10
LEVEL SHIFT
IC312 (1/3)
LEVEL SHIFT
IC312 (2/3)
LEVEL SHIFT
IC312 (3/3)
TXD
RXD
CLK
MAS-BUSY
MEC-BUSY
49
32
26
48
31
47
46
50
34
33
CTS
RTS
SIO CLK
SIO TXD
SIO RXD
M
M904
(ELEVATOR UP/DOWN)
M
8
7
87
SENSOR (MAIN)
SENSOR (SUB)
ELEVATOR POSITION
SENSOR
D1
LEVEL SHIFT
Q2, 3
ELEVATOR POSITION
SENSOR
D2
LEVEL SHIFT
Q1
D701 – 703
LED DRIVE
Q503 – 505
56
55
54
MONO
ANA
DIG
D704, 705,
D712 – 714
68
67
66
REC IT
CD SYNC
PROGRAM
65
64
SHUFFLE
CONTINUE
A/D, D/A CONVERTER
IC201
12
15
16
24
23
11
SDTO AINL
AINR
AOUTL
AOUTR R-CH
R-CH
R-CH
SDTI
SCLK
MCLK
LRCK
XBCK
FS256
LRCK
DEM0
14
13
5
3
26
27
C
(Page 20)
(Page 20)
(Page 20)
A
D
DIG IN SEL1
DIG IN SEL0
(Page 20)
PDAD
PDDA
OPTICAL
RECEIVER
IC302
REC AMP
IC318
RV801
REC LEVEL J101
MD ANALOG
MD DIGITAL
SYSTEM CONTROL
OPTICAL
DIGITAL IN
CD PLAYER
OPTICAL
DIGITAL IN
VIDEO 2
OPTICAL
DIGITAL IN
VIDEO 1
IC301 – 303
R-CH
IN
L
R
OUT
L
R
OPTICAL
RECEIVER
IC301
OPTICAL
RECEIVER
IC303
BUFFER
IC304
DIGITAL INPUT
SELECTOR
IC306
AB
6
14 2
4
5
3
7
B
•SIGNAL PATH
: MD PLAY
: MD REC (ANALOG INPUT)
: MD REC (DIGITAL INPUT)
24 – 22, 20 – 13
QC – QE, QG – QN
D708 – 711,
D801 – 803
4
DATA LED DATA
LED CLOCK
LED LATCH
LED DRIVE
IC702
CLK
LATCH
860
59
58
57
6
7
RES LED REST
B+
REC AMP (IC318)
+3.3V
REGULATOR
IC192
B– RECT
D314 – 316, 321
–29V
REGULATOR
Q521, 522
–29V
(FL DRIVER (IC701) B–)
RECT
D312, 313
CN308
F1
TO FL701
F2
D305
D329
D304
D303
+5V
+5V
BACK UP +3.3V
D331
14
16
AC
AC
11 YBUS BUSY
10 YBUS CLK
9YBUS DATA3
8YBUS DATA2
7YBUS DATA1
6YBUS DATA0
RECT
D326, 327
+3.3V
FOR MECHANISM
DECK SECTION
+5V
MASTER CONTROLLER
(IC305) B+
+3.3V
FOR DIGITAL INPUT
CIRCUIT B+
+5.6V
REGULATOR
IC315
+3.3V
REGULATOR
IC314
+5.6V MOTOR +5.6V
REGULATOR
IC310
AD/DA +5V +5V
REGULATOR
IC319
RECT
D319, 320
OEMREST
51
BACK UP
+3.3V
+5V
D328
POWER DOWN
DETECT
IC316
RESET SIGNAL
GENERATOR
IC317
RESET
POW DOWN
12 – 1, 64, 63
DIG0 – DIG13 59 – 33, 31 – 24
SEG0 – SEG34
OSC
C707, R705
FLUORESCENT
INDICATOR
TUBE DRIVER
IC701
FLUORESCENT
INDICATOR
TUBE
FL701
FL DATA
FL CLOCK
42
43
44
45
16
15
14
13
20
DATA
CLK
XOUT
XIN
RES
CS FL RES
FL CL
21
96
99
82
83
84
85
18
52
LD IN
LD OUT
ELV UP
ELV DW
DISC3 SW
88
DISC4 SW
S10
(LOADING IN DETECT)
DISC2 SW
DISC1 SW
S9
(RESET) S8
(HOME POSITION DETECT)
89
S11
(LOADING OUT DETECT)
OUT SW
93
MDM RESET SW
INT SW
91
IN SW
DISC5 SW
97
S1
(DISC 1 DETECT)
S3
(DISC 2 DETECT)
S5
(DISC 3 DETECT)
86
+5V
+5V
87
90
92
KEY0 – KEY3
S700 – 709, 711 – 713,
S716, 718, 721 – 723,
S726 – 728
25 – 28
ROTARY
ENCODER
S661
JOG A
JOG B 19
20 =SELECTOR +
S661
15 RESET
SWITCH
Q301
8
17
16
5
OPTICAL
DIGITAL IN
LD/DVD
OPTICAL
DIGITAL IN
CS/BS
MDS-EX880 MDS-MS717
MDS-EX880 MDS-MS717