Sony MXD-D40 - Md Player User manual

SERVICE MANUAL
COMPACT DISC MINIDISC DECK
US Model
Canadian Model
AEP Model
UK Model
E Model
SPECIFICATIONS
MXD-D40
US and foreign patents licensed from Dolby
Laboratories Licensing Corporation.
Photo: Gold type
CD player section
System Compact Disc digital audio system
Laser Semiconductor laser (λ= 780 nm)
Emission duration: continuous
Laser output Less than 44.6 µW*
* This output is the value measured at a
distance of 200 mm from the objective
lens surface on the Optical Pick-up
Block with 7 mm aperture.
Frequency response 5 to 20,000 Hz ±0.5 dB
Signal-to-noise ratio More than 98 dB
Wow and flutter Below measurable limit
MD deck section
System MiniDisc digital audio system
Disc MiniDisc
Laser Semiconductor laser (λ= 780 nm)
Emission duration: continuous
Laser output Less than 44.6 µW*
* This output is the value measured at a
distance of 200 mm from the objective
lens surface on the Optical Pick-up
Block with 7 mm aperture.
Laser diode properties Material: GaAlAs
Revolutions (CLV) 800 rpm to 1,800 rpm
Error correction Advanced Cross Interleave Reed
Solomon Code (ACIRC)
Sampling frequency 44.1 kHz
Coding Adaptive TRansform Acoustic Coding
(ATRAC)/ATRAC 3
Modulation system EFM (Eight-to-Fourteen Modulation)
Number of channels 2 stereo channels
Frequency response 5 to 20,000 Hz ±0.5 dB
Signal-to-noise ratio Over 98 dB during playback
Wow and flutter Below measurable limit
Inputs
Jack type Input
impedance Rated input Minimum input
ANALOG IN
Phono
jacks
47 kilohms 500 mVrms 125 mVrms
DIGITAL
OPTICAL IN
Square
optical
connector
jack
Optical wave
length:
660 nm ——
Ver. 1.2 2005.03
Model Name Using Similar Mechanism MXD-D5C
MD Mechanism Type MDM-7X2A
Optical Pick-up Name KMS-262A
Model Name Using Similar Mechanism MXD-D4
CD Mechanism Type CDM55B-21BD53
Base Unit Name BU-21BD53
Optical Pick-up Name OP Assy (A-MAX.2)
MD
Section
CD
Section
– Continued on next page –
9-929-578-13
2005C05-1
© 2005.03
Sony Corporation
Audio Group
Published by Sony Engineering Corporation

2
MXD-D40
General
Power requirements
Where purchased Power requirements
U S A and Canada 120 V AC, 60 Hz
Europe 220 - 230 V AC, 50/60 Hz
Certain countries in Asia 220 - 240 V AC, 50/60 Hz
Other countries 110 - 120 or 220 - 240 V AC
selectable, 50/60 Hz
Power consumption 22 W (less than 1 W at standby)
Dimensions (approx.) (w/h/d) incl. projecting parts and controls
430 × 120 × 290 mm
Mass (approx.) 4 7 kg
Supplied accessories
Design and specifications are subject to change without
notice
• Audio connecting cords (2)
• Remote commander (remote) (1)
• Sony R6 (size-AA) batteries (2)
• Power plug adaptor (1) (Singaporian model only)
Outputs
Jack type Rated output Load impedance
PHONES
Stereo phone
jack
10 mW 32 ohms
ANALOG
OUT
Phono jacks 2 Vrms
(at 50 kilohms)
Over 10 kilohms
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED
LINE WITH MARK 0ON 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.

3
MXD-D40
SELF-DIAGNOSIS FUNCTION
The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes
which show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the
following box in the instruction manual. For details on how to check error codes during servicing, refer to the following “Procedure for
using the Self-Diagnosis Function (Error History Display Mode)”.
PROCEDURE FOR USINGTHE SELF-DIAGNOSIS FUNCTION (ERROR HISTORY DISPLAY MODE)
Note: Perform the self-diagnosis function in the “error history display mode” in the test mode. The following describes the least required procedure. Be
careful not to enter other modes by mistake. If you set other modes accidentally, press the [MENU/NO] button to exit the mode.
1. Press the x(CD), x(MD) and [YES] buttons at the same time.
2. Press the [ AMS ] (MD) knob and x(MD) button to display “ <To Normal> 0”.
3. Turn the [ AMS ] (MD) knob and when “ <MD Test> 5” is displayed, press the [ AMS ] (MD) knob.
4. Turn the [ AMS ] (MD) knob and when “[Service]” is displayed, press the [YES] button.
5. Turn the [ AMS ] (MD) knob to display “Err Display”.
6. Press the [YES] button to sets the error history mode and displays “op rec tm”.
7. Select the contents to be displayed or executed using the [ AMS ] (MD) knob.
8. Press the [ AMS ] (MD) knob to display or execute the contents selected.
9. Press the [ AMS ] (MD) knob another time returns to step 6.
10. Press the [MENU/NO] button to display “Err Display” and release the error history mode.
11. To release the test mode, press the ?/1button to display “ <MD Test> 5”.
12. To turn the power OFF, turn the [ AMS ] (MD) knob and when “ <Initial> 8” displayed, press the [ AMS ] (MD)
knob.
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Self-Diagnosis Function
The deck has a self-diagnosis display This function shows a three- or five-digit display (a combination of a letter and
figures) and the corresponding message, so you can check the deck’s condition
If such a display appears, check the following table in order to resolve the problem
Should any problem persist, consult your nearest Sony dealer
Three- or five-digit display/Message Cause/Remedy
C11/Protected The inserted MD is record-protected
, Take out the MD, and close the record-protect tab
C13/REC Error The recording was not made properly
, Set the deck in a stable place, and repeat the recording procedure
The inserted MD is dirty (with smudges, fingerprints, etc ), scratched, or not up to
standards
, Replace the disc, and repeat the recording procedure
C14/TOC Error The deck could not read the TOC of the MD properly
, Insert another disc
, If possible, erase all tracks on the MD using the All Erase Function
While recording from a digital component connected through the DIGITAL
OPTICAL IN connector, the digital connecting cable was unplugged or the digital
component turned off
, Connect the cable or turn the digital component back on
C12/Cannot Copy An attempt was made to play a disc that is not compatible with this deck (CD-
ROM, MD data disc, etc )
, Replace the disc
C13/Read Error The deck could not read the TOC of the MD properly
, Eject the disc, then insert it again
C41/Cannot Copy The digitally dubbed material cannot be recorded digitally
C71/Din Unlock A moment’s lighting is due to the signals of the digital program being recorded
This does not affect the recorded material
E0001/MEMORY NG There is an error in the internal data that the deck needs in order to operate
, Consult your nearest Sony dealer
E0101/LASER NG There ia a problem with the optical pick-up
, The optical pick-up may have failed Consult your nearest Sony dealer

4
MXD-D40
ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS
Selecting theTest Mode
Display Details of History
op rec tm Cumulative recording time is displayed.
When cumulative recording time is over 1 minute, the hour and minute are displayed as they are.
When it is under 1 minute, “Under 1 min” is displayed.
The displayed time shows how long the laser is in high power state.
It is about one fourth the actual recording time.
op play tm Cumulative playing time is displayed.
When cumulative playing time is over 1 minute, the hour and minute are displayed as they are.
When it is under 1 minute, “Under 1 min” is displayed.
spdl rp tm Cumulative spindle motor running time is displayed.
When cumulative spindle motor run time is over 1 minute, the hour and minute are displayed as they are.
When it is under 1 minute, “Under 1 min” is displayed.
retry err Displays the total number of retries during recording and number of retry errors during play.
Displayed as “rss pss”.
“r” indicates the retries during recording while “p” indicates the retry errors during play.
The number of retries and retry errors are displayed in hexadecimal digits from 00 to FF.
total err Displays the total number of errors.
Displayed as “total ss”.
The number of errors is displayed in hexadecimal digits from 00 to FF.
err history Displays the 10 latest errors.
Displayed as “0sErrCd@@”.
sindicates the history number. The smaller the number, the more recent is the error. (00 is the latest).
@@ indicates the error code.
Refer to the following table for the details. The error history can be switched by turning the [ AMS ]
(MD) knob.
retry adrs Displays the past five retry addresses.
Displays “ss ADRS ssss”, ss is the history number, ssss is the cluster with the retry error.
Select the error history number using the [ AMS ] knob.
er refresh Mode to clear the error history and retry address history.
[Operating method]
1) Press [ AMS ] (MD) knob when “er refresh” is displayed.
2) The display will change to “er refresh?”, and then press [YES] button.
The operation is over if “Complete!” is displayed.
After this mode was executed, check the following:
• The data have been cleared.
• Perform the recording and playing to check that the mechanism operates normally.
tm refresh Mode to clear the “op rec tm” and “op play tm” histories.
These histories serve as approximate indications of when to replace the optical pick-up. If the optical pick-up
has been replaced, perform this operation and clear the history.
[Operating method]
1) Press [ AMS ] (MD) knob when “tm refresh” is displayed.
2) The display will change to “tm refresh?”, and then press [YES] button.
The operation is over if “Complete!” is displayed.
After this mode was executed, check the following:
• The data have been cleared.
• Perform the recording and playing to check that the mechanism operates normally.
op change Mode to clear cumulative time of “op rec tm” and “op play tm”.
These historical data are used to determine the timing when the optical pick-up is to be replaced. When the
optical pick-up was replaced, perform this operation to clear historical data.
[Operating method]
1) Press [ AMS ] (MD) knob when “op change” is displayed.
2) The display will change to “op chang?”, and then press [YES] button.
The operation is over if “Complete!” is displayed.
spdl change Mode to clear cumulative time of “spdl rp tm”.
This historical data is used to determine the timing when the spindle motor is to be replaced. When the spindle
motor was replaced, perform this operation to clear historical data.
[Operating method]
1) Press [ AMS ] (MD) knob when “spdl change” is displayed.
2) The display will change to “spdl chang?”, and then press [YES] button.
The operation is over if “Complete!” is displayed.
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5
MXD-D40
Error Code Details of Error
10 Loading failed
12 Loading switch combination is illegal
20 Head of PTOC could not be read within the
specified time
21 Head of PTOC could be read but its content is
erroneous
22 Access to UTOC could not be made within the
specified time
23 UTOC could be not read within the specified
3time
24 Content of UTOC is erroneous
30 Playing could not start
31 Content of sector is erroneous
40 Cause of retry occurred during normal recording
41 D-RAM overflowed and retry was executed
42 Retry was executed during the writing to TOC
43 S.F editing was interrupted by retry
50 Address could not be read except in access
processing
51 Focusing failed and it is out of control
60 Unlock retry
Table of Error Codes

6
MXD-D40
SELF-DIAGNOSIS FUNCTION........................... 3
1. SERVICING NOTES ............................................... 8
2. GENERAL ................................................................... 18
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 19
3-2. Loading Panel.................................................................. 20
3-3. Case ................................................................................. 20
3-4. Front Panel Assy ............................................................. 21
3-5. MAIN Board ................................................................... 21
3-6. MD Mechanism Deck (MDM-7X2A) ............................ 22
3-7. BD (MD) Board, Over Write Head (HR901) ................. 22
3-8. Holder Assy ..................................................................... 23
3-9. Loading Motor Assy (M103) .......................................... 23
3-10. Sled Motor Assy (M102) ................................................ 24
3-11. Optical Pick-up (KMS-262A)......................................... 24
3-12. Spindle Motor Assy (M101) ........................................... 25
3-13. CD Mechanism Deck (CDM55B-21BD53) ................... 25
3-14. Holder (BU) Assy............................................................ 26
3-15. BU-21BD53, Holder (55-BU21) .................................... 26
3-16. Tray, LOADING Board................................................... 27
3-17. Cam (CDM55) ................................................................ 27
4. TEST MODE.............................................................. 28
5. ELECTRICAL ADJUSTMENTS
MD Section ..................................................................... 34
CD Section ...................................................................... 45
6. DIAGRAMS
6-1. Block Diagram – MD SERVO Section – ....................... 47
6-2. Block Diagram – MAIN Section – ................................. 48
6-3. Block Diagram
– DISPLAY/POWER SUPPLY Section – ..................... 49
6-4. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 50
6-5. Printed Wiring Board – BD (CD) Board – ..................... 52
6-6. Schematic Diagram – BD (CD) Board –........................ 53
6-7. Schematic Diagram – BD (MD) Board (1/2) – .............. 54
6-8. Schematic Diagram – BD (MD) Board (2/2) – .............. 55
6-9. Printed Wiring Board – BD (MD) Board – .................... 56
6-10. Printed Wiring Board
– MAIN Board (Side A) –............................................... 58
6-11. Printed Wiring Boards
– MAIN (Side B)/LOADING Boards – ......................... 59
6-12. Schematic Diagram – MAIN Board (1/4) – ................... 60
6-13. Schematic Diagram
– MAIN (2/4)/LOADING Boards – ............................... 61
6-14. Schematic Diagram – MAIN Board (3/4) – ................... 62
6-15. Schematic Diagram – MAIN Board (4/4) – ................... 63
6-16. Printed Wiring Boards
– DISPLAY/LP LED/PW SW Boards –......................... 64
6-17. Schematic Diagram
– DISPLAY/LP LED/PW SW Boards –......................... 65
6-18. Printed Wiring Board
– TRANS Board (Except Singapore) – .......................... 66
6-19. Schematic Diagram
– TRANS Board (Except Singapore) – .......................... 67
6-20. Printed Wiring Boards
– TRANS (SP)/LF Boards (Singapore) –....................... 68
6-21. Schematic Diagram
– TRANS (SP)/LF Boards (Singapore) –....................... 69
6-22. Printed Wiring Board – HP Board – ............................... 70
6-23. Schematic Diagram – HP Board –.................................. 70
6-24. IC Pin Function Description ........................................... 72
7. EXPLODED VIEWS
7-1. Case Section .................................................................... 82
7-2. Front Panel Section ......................................................... 83
7-3. Chassis Section ............................................................... 84
7-4. MD Mechanism Deck Section-1 (MDX-7X2A) ............ 85
7-5. MD Mechanism Deck Section-2 (MDX-7X2A) ............ 86
7-6. CD Mechanism Deck Section (CDM55B-21BD53) ...... 87
8. ELECTRICAL PARTS LIST ............................... 88
TABLE OF CONTENTS

7
MXD-D40
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
TheAC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’instructions to use these
instruments.
2. A battery-operatedAC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are
suitable. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µF
AC
voltmete
r
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
ADVARSEL
Eksplosjonsfare ved feilaktig skifte av batteri.
Benytt samme batteritype eller en tilsvarende type
anbefalt av apparatfabrikanten.
Brukte batterier kasseres i henhold til fabrikantens
instruksjoner.
VARNING
Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en likvärdig typ som
rekommenderas av apparattillverkaren.
Kassera använt batteri enligt gällande föreskrifter.
VAROITUS
Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
ADVARSEL!
Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri
af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by
the manufacturer.
Discard used batteries according to the manufacturer’s instructions.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
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 dur-
ing 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
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 of the unit

8
MXD-D40 SECTION 1
SERVICING NOTES
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.
For CD
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.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveforms is output three times.
For MD
NOTES ON LASER DIODE EMISSION CHECK
Never look into the laser diode emission from right above when
checking it for adjustment. It is feared that you will lose your sight.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
Model Part No.
US model 4-230-771-5s
Canadian model 4-230-771-6s
AEP, UK models 4-230-771-7s
Singapore model 4-230-771-8s
MODEL IDENTIFICATION
— BACK PANEL —
Part No.
(Figure A)
CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP
• In cleaning the objective lens of optical pick-up, be sure the
following below.
1. In cleaning the lens, do not apply an excessive force.
As the optical pick-up is vulnerable, application of excessive
force could damage the lens holder.
2. In cleaning, do not use a cleaner other than exclusive cleaning
liquid (KK-91 or isopropyl alcohol).
3. Wipe the objective lens spirally from center toward outside.
(See Figure A)
4. Eject the disk, if loaded.
5. Disconnect the power cord from the socket to shut off the power
supply.
6. When cleaning the objective lens of optical pick-up in CD,
refer to “HOLDER (BU)ASSY” on page 26.
SERVICE POSITION
Please put the MAIN board straight as the figure shown below
when performing adjustment or check on the MAIN board.
MAIN BOARD
NOTE ON VOLTAGE ADJUSTMENT
Be sure to execute the Voltage Adjustment on page 46, whenever
the CD base unit (BU-21BD53), mounted MAIN board, and IC506,
R550, R551, or RV500 on the MAIN board were replaced.

9
MXD-D40
I+3V
IOP
GND
TE
FE
VC
RF
I+3V
IOP
GND
TE
FE
VC
RF
1
7
for
MDM-7X2
A
I+3V
CN105
IOP
TE
VC
GND
FE RF
MD SECTION
JIG FOR CHECKING BD (MD) BOARD WAVEFORM
The special jig (J-2501-196-A) is useful for checking the waveform of the BD (MD) board.The names of terminals and the checking items
to be performed are shown as follows.
GND : Ground
I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser)
IOP : For measuring IOP (Check the deterioration of the optical pick-up laser)
TE : Tracking error signal (Traverse adjustment)
VC : Reference level for checking the signal
RF : RF signal (Check jitter)
FE : Focus error signal

10
MXD-D40
IOP DATA RECORDING AND DISPLAYWHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF
BD (MD) BOARD) ARE REPLACED
The IOP value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need
to look at the value on the optical pick-up label. When replacing the optical pick-up or non-volatile memory (IC195 of BD (MD) board),
record the IOP value on the optical pick-up according to the following procedure.
Record Procedure:
1. Press the x(CD), x(MD) and [YES] buttons at the same time.
2. Press the [ AMS ] (MD) knob and x(MD) button to display “ <To Normal> 0”.
3. Turn the [ AMS ] (MD) knob and when “ <MD Test> 5” is displayed, press the [ AMS ] (MD) knob.
4. Turn the [ AMS ] (MD) knob to display “[Service]”, and press the [YES] button.
5. Turn the [ AMS ] (MD) knob to display “Iop Write” (C05), and press the [YES] button.
6. The display becomes “Ref=@@@.@” (@ is an arbitrary number) and the numbers which can be changed will blink.
7. Input the IOP value written on the optical pick-up label.
To select the number: Turn the [ AMS ] (MD) knob.
To select the digit : Press the [ AMS ] (MD) knob.
8. When the [YES] button is pressed, the display becomes “Measu=@@@.@” (@ is an arbitrary number).
9. As the adjustment results are recorded for the 6 value. Leave it as it is and press the [YES] button.
10. “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop
Write (C05)”.
11. Press the ?/1button to display “<MD Test> 5”.
12. To turn the power OFF, Turn the [ AMS ] (MD) knob and when “<Initial> 8” displayed, press the [ AMS ] (MD)
knob.
Display Procedure:
1. Press the x(CD), x(MD) and [YES] buttons at the same time.
2. Press the [ AMS ] (MD) knob and x(MD) button to display “ <To Normal> 0”.
3. Turn the [ AMS ] (MD) knob and when “ <MD Test> 5” is displayed, press the [ AMS ] (MD) knob.
4. Turn the [ AMS ] (MD) knob to display “[Service]”, and press the [YES] button.
5. Turn the [ AMS ] (MD) knob to display “Iop Read” (C26), and press the [YES] button.
6. “@@.@/##.#” is displayed and the recorded contents are displayed.
@@.@: indicates the IOP value on the optical pick-up label.
##.# : indicates the IOP value after adjustment
7. To end, press the [ AMS ] (MD) knob or [MENU/NO] button to display “Iop Read” (C26).
8. Press the ?/1button to display “<MD Test> 5”.
9. To turn the power OFF, Turn the [ AMS ] (MD) knob and when “<Initial> 8” displayed, press the [ AMS ] (MD)
knob.
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11
MXD-D40
CHECKS PRIORTO PARTS REPLACEMENT AND ADJUSTMENTS IN MD
Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent.
Details of the procedures are described in “5 Electrical Adjustments”.
• 0.9 mW power
Specified value : 0.80 to 0.96 mW
• 8.4 mW power
Specified value : 8.2 to 8.6 mW
• Iop (at 8.4mW)
Labeled on the optical pick-up
Iop value ±10mA
• Unsatisfactory if displayed as “NG: XXXX”
NG
(XXXX is arbitrary number)
• Unsatisfactory if displayed as “T=@@ (##) [NG”
NG
(@@, ## are both arbitrary numbers)
Laser power check
(6-2 : See page 37)
Auto check
(6-4 : See page 38)
Temperature
compensation
offset check
(6-1 : See page 37)
Criteria for Determination
(Unsatisfactory if specified value is not satisfied)
• Clean the optical pick-up
• Adjust again
• Replace the optical pick-up
• Replace the optical pick-up
• Replace the optical pick-up
• Check for disconnection of the circuits around
D101 (BD (MD) board)
• Check the signals around IC101, IC151, CN102,
CN103 (BD (MD) board)
Measure if unsatisfactory:
Note:
The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments.
When performing adjustments, use the specified values for adjustments.

12
MXD-D40
No. Display Function
0 <To Normal> 0 Exit from test mode
1 <Version> 1 Microcomputer Version display
2 <FLD> 2 FL display test & LED display test
3 <Key, Jog> 3 Key/Jog input test
4 <CD Test> 4 CD all sorts test
5 0> COMMAND Command transfer menu
6 1> ERROR C1, C2 error display
7 2> SPEED X1 Disc speed selection
8 3> ISRC ISRC display
9 4> CHECK8 Check 8 cm display
10 5> AUTO G Auto gain display
11 6> HENSHIN Decentiering display
12 7> PORT Port selection
13 8> AMS ON AMS display
14 9> TRK ON TRK ON/OFF display
15 A> SJI Not Support
16 <MD Test> 5 MD all sorts test
17 <Retry & TOC> 6 MD TOC off & Retry test
18 <PC LINK> 7 PC connection check
19 <Initial> 8 All reset
20 <MD Update> 9 Software update
21 <Sircs> 10 Sircs code mode
22 <Dump> 11 Microcomputer Dump mode
23 <CD Aging> 12 CD aging
24 <Rep 5 off> 13 Cancel restriction of repeat five times
25 <KeyBoard> 14 Keyboard check
26 <Special> 15 Command, Sircs test
27 <CD ship> 16 Shipment mode
SERVICE MODE
This set provides various modes for the service.
Enter the service mode through the procedure given below, and select the desired mode.
Procedure:
1. Press the x(CD), x(MD) and [YES] buttons at the same time.
2. Press the [ AMS ] (MD) knob and x(MD) button to display “ <To Normal> 0”.
3. At this time, turn the [ AMS ] (MD) knob can select all modes. For the contents of mode, see the following table.
4. To exit from the service mode, turn [ AMS ] (MD) knob to display “<To Normal> 0”, then press the [ AMS ] (MD)
knob.
Contents of test mode
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13
MXD-D40
Microcomputer Version Display
Procedure:
1. Enter the service mode, then turn [ AMS ] (MD) knob to display “<Version> 1”, and press the [ AMS ] (MD).
2. The CD microcomputer version is displayed, and then press the [ AMS ] (MD) knob, and the MD microcomputer version
and the display microcomputer version will be displayed.
3. To exit from the mode, press the [ AMS ] (MD) knob.
FL DisplayTest/LED display test
Procedure:
1. Enter the service mode, then turn [ AMS ] (MD) knob to display “<FLD> 2”, and press the [ AMS ] (MD).
2. All segments of fluorescent display tube turn on fully, and all LEDs turn off fully. Then, successive pressing the [ AMS ] (MD)
knob causes all segments of fluorescent display tube to turn off fully and all LEDs to turn on fully.
3. To exit from the mode, press the [ AMS ] (MD) knob.
Key/Jog InputTest
Procedure:
1. Enter the service mode, then turn [ AMS ] (MD) knob to display “<Key, Jog> 3”, and press the [ AMS ] (MD).
2. Clockwise rotation of the [ AMS ] (MD) knob moves the R-CH level meter, or counterclockwise rotation of the [ AMS ]
(CD) knob moves the L-CH level meter.
3. Press the buttons in order, and when all buttons were pressed, “Key OK!” will be displayed.
4. To exit from the mode, press the [ AMS ] (MD) knob.
Software Reset
Procedure:
1. Enter the service mode, then turn [ AMS ] (MD) knob to display “<Initial> 8”, and press the [ AMS ] (MD).
2. The microcomputer resets the software, and the power is turned off.
lL
lL
lL
lL
lL
lL
lL
lL
lL
lL
lL
lL
lL
lL
lL

14
MXD-D40
RETRY CAUSE DISPLAY MODE IN MD
• In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. During playback,
the “track mode” for obtaining track information will be set.
This is useful for locating the faulty part of the unit.
• The following will be displayed :
During recording and stop: Retry cause, number of retries, and number of retry errors.
During playback : Information such as type of disc played, part played, copyright.
These are displayed in hexadecimal.
Procedure:
1. Load a recordable disc whose contents can be erased into the unit.
2. Press the [MENU/NO] button.When “Edit Menu” is displayed on the fluorescent indicator tube, turn the [ AMS ] (MD) knob
to display “All Erase?”.
3. Press the [YES] button. (Or press the [ AMS ] (MD) knob)
4. “All Erase?” is displayed on the fluorescent indicator tube.
5. Press the [YES] button to display “Complete!”.
6. Press the x(CD), x(MD) and [YES] buttons at the same time. Press the [ AMS ] (MD) knob and x(MD) button to
display “<To Normal> 0”. Turn the [ AMS ] (MD) knob and when “<Retry & TOC> 6” is displayed, press the [ AMS ]
(MD) knob.
7. Press the [REC ] button to start recording. Then press the X(MD) button and start recording.
8. To check the “track mode”, press the H(MD) button to start play.
9. Press the ?/1button to display “<MD Test> 5”.
10. To turn the power OFF, turn the [ AMS ] (MD) knob and when the [ AMS ] (MD) knob. When “TOC” disappears,
disconnect the power plug from the outlet.
Fig. 1 Reading theTest Mode Display
(During recording and stop)
RTs@@c##e**
Fluorescent indicator tube display
@@ : Cause of retry
## : Number of retries
** : Number of retry errors
Fig. 2 Reading theTest Mode Display
(During playback)
@@ ###** $$
Fluorescent indicator tube display
@@ : Parts No. (name of area named on TOC)
## : Cluster
** : Sector
$$ : Track mode (Track information such as copy-
right information of each part)
shock
ader5
Discontinuous address
DIN unlock
FCS incorrect
IVR rec error
CLV unlock
Access fault
Reading the Display:
Convert the hexadecimal display into binary display. If more than two causes, they will be added.
Example
When 42 is displayed:
Higher bit: 4 = 0100 tb6
Lower bit : 2 = 0010 tb1
In this case, the retry cause is combined of “CLV unlock” and “ader5”.
When A2 is displayed:
Higher bit: A = 1010 tb7 + b5
Lower bit : 2 = 0010 tb1
The retry cause in this case is combined of “Access fault”, “IVR rec error”, and “ader5”.


Address
lL
lL
z
lL lL
lL
lL
lL
Reading the Retry Cause Display
84218421
b7 b6 b5 b4 b3 b2 b1 b0
00000001
00000010
00000100
00001000
00010000
00100000
01000000
10000000
Hexa-
decimal Cause of Retry
01
02
04
08
10
20
40
80
Higher Bits Lower Bits
Hexadecimal
Bit
Binary
Occurring conditions
When track jump (shock) is detected
When ADER was counted more than five times
continuously
When ADIP address is not continuous
When DIN unlock is detected
When not in focus
WhenABCD signal level exceeds the specified range
When CLV is unlocked
When access operation is not performed normally

15
MXD-D40
Reading the Retry Cause Display
84218421
b7 b6 b5 b4 b3 b2 b1 b0
00000001
00000010
00000100
00001000
00010000
00100000
01000000
10000000
Hexa-
decimal Details
01
02
04
08
10
20
40
80
Higher Bits Lower Bits
Hexadecimal
Bit
Binary When 0
Emphasis OFF
Monaural
This is 2-bit display. Normally 01.
01:Normal audio. Others:Invalid
Audio (Normal)
Original
Copyright
Write prohibited
When 1
Emphasis ON
Stereo
Invalid
Digital copy
No copyright
Write allowed
Reading the Display:
Convert the hexadecimal display into binary display. If more than two causes, they will be added.
Example When 84 is displayed:
Higher bit: 8 = 1000 tb7
Lower bit : 4 = 0100 tb2
In this case, as b2 and b7 are 1 and others are 0, it can be determined that the retry cause is combined of “Emphasis OFF”, “Monaural”,
“Original”, “Copyright”, and “Write allowed”.
Example When 07 is displayed:
Higher bit: 0 = 0000 tAll 0
Lower bit : 7 = 0111 tb0 + b1 + b2
In this case, as b0, b1, and b2 are 1 and others are 0, it can be determined that the retry cause is combined of “Emphasis ON”, “Stereo”,
“Original”, “Copyright”, and “Write prohibited”.
Hexadecimal t Binary ConversionTable
Hexadecimal Binary Hexadecimal Binary
0 0000 8 1000
1 0001 9 1001
2 0010 A 1010
3 0011 B 1011
4 0100 C 1100
5 0101 D 1101
6 0110 E 1110
7 0111 F 1111

16
MXD-D40
CD SECTION
• In checking the CD block and MAIN board, prepare jig.
• In checking the CD block, prepare jig (extension cable J-2501-075-A) to connect the BD (CD) board (CN101) and MAIN board
(CN302).
• In checking the MAIN board, prepare jig (extension cable J-2501-094-A) to connect the MAIN board (CN305) and DISPLAY board
(CN951).
CD-TEXTTEST DISC
This unit is able to display the test data (character information) written in the CD on its fluorescent indicator tube.
The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used for checking the display.
To check, perform the following procedure.
Checking Method:
1. Turn ON the power, set the disc to the disc table with the “test disc” label facing up, and chuck the disc.
2. Press the H(CD) button and play back the disc.
3. The following will be displayed on the fluorescent indicator tube.
Display : 1KHZ 0DB
4. Rotating [ AMS ] (CD) knob, select the track. The text data of each track will be displayed.
For details of the displayed contents for each track, refer to “Table 1 : CD-TEXT TEST DISC TEXT Data Contents” and “Table 2 : CD-
TEXT TEST DISC Recorded Contents and Display”.
Restrictions in CD-TEXT Display
In this unit, some special characters will not be displayed properly. These will be displayed as a space or a character resembling it. For
details, refer to “Table 2 : CD-TEXT DISC Recorded Contents and Display”.
Table 1 : CD-TEXTTEST DISCTEXT Data Contents (TRACKS No. 1 to 41:Normal Characters)
1 1kHz/0dB/L&R 22 1kHz/–90dB/L&R
2 20Hz/0dB/L&R 23 Infinity Zero w/o emphasis//L&R
3 40Hz/0dB/L&R 24 Infinity Zero with emphasis//L&R
4 100Hz/0dB/L&R 25 400Hz+7kHz(4:1)/0dB/L&R
5 200Hz/0dB/L&R 26 400Hz+7kHz(4:1)/–10dB/L&R
6 500Hz/0dB/L&R 27 19kHz+20kHz(1:1)/0dB/L&R
7 1kHz/0dB/L&R 28 19kHz+20kHz(1:1)/–10dB/L&R
8 5kHz/0dB/L&R 29 100Hz/0dB/L*
9 7kHz/0dB/L&R 30 1kHz/0dB/L*
10 10kHz/0dB/L&R 31 10kHz/0dB/L*
11 16kHz/0dB/L&R 32 20kHz/0dB/L*
12 18kHz/0dB/L&R 33 100Hz/0dB/R*
13 20kHz/0dB/L&R 34 1kHz/0dB/R*
14 1kHz/0dB/L&R 35 10kHz/0dB/R*
15 1kHz/–1dB/L&R 36 20kHz/0dB/R*
16 1kHz/–3dB/L&R 37 100Hz Squer Wave//L&R
17 1kHz/–6dB/L&R 38 1kHz Squer Wave//L&R
18 1kHz/–10dB/L&R 39 1kHz w/emphasis/–0.37dB/L&R
19 1kHz/–20dB/L&R 40 5kHz w/emphasis/–4.53dB/L&R
20 1kHz/–60dB/L&R 41 16kHz w/emphasis/–9.04dB/L&R
21 1kHz/–80dB/L&R
TRACK
No. Displayed Contents
Note: The contents of Track No. 1 to 41 are the same as those of the current TEST DISC-their titles are displayed.
TRACK
No. Displayed Contents
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17
MXD-D40
Table 2: CD-TEXTTEST DISC Recorded Contents and Display
(In this unit, some special characters cannot be displayed. This is not a fault)
TAll the same
TAll the same
TAll the same
TAll the same
TAll the same
TAll the same
TAll the same
TAll the same
TAll the same
TAll the same
TAll the same
TAll the same (A0h to A7h) 8859-1
(A8h to AFh)
(B0h to B7h)
(B8h to BFh)
AAAAAA C (C0h to C7h)
EEEEIIII (C8h to CFh)
D NOOOOO (D0h to D7h)
O U U U U Y (D8h to DFh)
aaaaaa c (E0h to E7h)
eeeeiiii (E8h to EFh)
dnooooo (F0h to F7h)
ouuuuy y (F8h to FFh)
TAll the same
TAll the same
to
TAll the same
TRACK
No. Recorded contents
´
′
*
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
to
99
! ” # $ %& ´ (21h to 27h)1kHz 0dB L&R
( ) + , – . / (28h to 2Fh)
01234567 (30h to 37h)
8 9 : ; < = > ? (38h to 3Fh)
@A B C D E F G (40h to 47h)
H I J K L MNO (48h to 4Fh)
P QR S T U VW (50h to 57h)
X Y Z [ ¥ ] ^ _ (58h to 5Fh)
a b c d e f g (60h to 67h)
h i j k l m n o (68h to 6Fh)
p q r s t u v w (70h to 77h)
xyz{I } (78h to 7Fh)
i¢£¤¥ § (A0h to A7h) 8859-1
Cª¬PR–(A8h to AFh)
•±23 µ¶ • (B0h to B7h)
†1º¿ (B8h to BFh)
À Á Â Ã Ä ÅÆÇ (C0h to C7h)
ÈÉÊËÌÍÎÏ (C8h to CFh)
DÑÒÓÔÕÖ (D0h to D7h)
ØÙÚÛÜY ß (D8h to DFh)
à á â ã ä åæ ç (E0h to E7h)
èéêëìíîï (E8h to FFh)
∂ñòóôõö÷(F0h to F7h)
øùúûüy ÿ (F8h to FFh)
No.66
No.67
to
No.99
˙
~
′
1
41 23 4
Display

18
MXD-D40
23 4 51
2 3 4 5 6 789 q;qa qs qd qf
qjqkqlw;
wa
ws
wd
wf
wg
whwk
wjwl
e;
eaesef
edeg
eh
1
qgqh
SECTION 2
GENERAL
Front view Rear view
1STANDBY indicator
2?/1(power) button
3REC-IT button
4CD tray
5Display window
6AOPEN/CLOSE (CD) button
7CD SYNCHRO NORMAL button
8CD SYNCHRO HIGH button
9MENU/NO button
q; MD insertion slot
qa YES button
qs AEJECT (MD) button
qd MD LP indicator
qf REC MODE button
qg PHONE LEVEL control
qh PHONES jack
qj REC zbutton
qk x(MD) button
ql X(MD) button
w; H(MD) button
wa m/M(MD) button
ws AMS (MD) control
wd CLEAR (MD) button
wf MD TIME/CHAR button
wg MD PLAY MODE button
wh INPUT button
wj DISPLAY button
wk CD PLAY MODE button
wl CD TIME button
e; CLEAR (CD) button
ea AMS (CD) control
es x(CD) button
ed X(CD) button
ef H(CD) button
eg m/M(CD) button
eh Remote sensor
1ANALOG IN jack
2ANALOG OUT jack
3DIGITAL OPTICAL IN terminal
4PC LINK terminal
5AC power cord
Setting the voltage selector (Singaporian
model only)
Check that the voltage selector on the rear panel of the
deck is set to the local power line voltage. If not, set
the selector to the correct position using a screwdriver
before connecting the AC power cord to an AC outlet.
220—240V110—120V
VOLTAGE
SELECTOR
This section is extracted from
instruction manual.

MXD-D40
19
SECTION 3
DISASSEMBLY
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
3-3. CASE
(Page 20)
3-5. MAIN BOARD
(Page 21) 3-4. FRONT PANEL ASSY
(Page 21)
SET
3-13. CD MECHANISM DECK
(CDM55B-21BD53)
(Page 25)
3-14. HOLDER (BU) ASSY
(Page 26) 3-16. TRAY,
LOADING BOARD
(Page 27)
3-17. CAM (CDM55)
(Page 27)
3-15. BU-21BD53,
HOLDER (55-BU21)
(Page 26)
3-6. MD MECHANISM DECK
(MDM-7X2A)
(Page 22)
3-7. BD (MD) BOARD
(Page 22)
3-7. OVER WRITE HEAD
(HR901)
(Page 22)
3-8. HOLDER ASSY
(Page 23)
3-9. LOADING MOTOR ASSY
(M103)
(Page 23)
3-10. SLED MOTOR ASSY
(M102)
(Page 24)
3-11. OPTICAL PICK-UP
(KMS-262A)
(Page 24)
3-12. SPINDLE MOTOR ASSY
(M101)
(Page 25)
3-3. CASE
(Page 20)
3-2. LOADING PANEL
(Page 20)
3-7. BD (MD) BOARD
(Page 22)
3-8. HOLDER ASSY
(Page 23)
Note: The process described in can be performed in any order.
Note: Without completing the process described in , the next process can not be performed.

MXD-D40
20
3 two claws
4 loading panel
2
1
3-2. LOADING PANEL
3-3. CASE
Note: Follow the disassembly procedure in the numerical order given.
1 two screws
(case3 TP2)
1 two screws
(case3 TP2)
1 two screws
(case3 TP2)
2 case