Sony HCD-MD333 - Hi Fi Cd/minidisc Component Service Manual
– 1 –
HCD-MD333
SPECIFICATIONS
SERVICE MANUAL
COMPACT DISC DECK RECEIVER
— Continued on next page —
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
HCD-MD333 is the amplifier, CD, MD and
tuner section in DHC-MD333.
Model Name Using Similar Mechanism NEW
Mechanism Type CDM13C-5BD19
Base Unit Type BU-5BD19
Optical Pick-up Type KSS-213B/K-N
Model Name Using Similar Mechanism NEW
Mechanism Type MDM-3J
Optical Pick-up Type KSM-260A-JIN
CD
SECTION
MD
SECTION
Ver 1.1 2001. 06
9-922-935-12
2001F0200-1
© 2001.6
Sony Corporation
Home Audio Company
Shinagawa Tec Service Manual Production Group
– 2 –
– 3 –
SELF-DIAGNOSIS FUNCTION
The self-diagnosis function consists of error codes for users 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 users, refer to the following box in the
instruction manual. For details on how to perform checks during servicing, refer to the following “Procedure for Using the Self-Diagnosis
Function (Error History Display Mode)”.
Procedure for Using the Self-Diagnosis Function (Error History Display Mode)
Note: Perform the self-diagnosis function in the “error history display mode” in the test mode. The following describes the least required
steps. Be careful not to enter other modes by mistake. If other modes are set accidentally, press the ^ (CD) button to exit that
mode.
1. With the power off, press the ^ (MD) button while pressing the PLAY MODE button.
2. Rotate the VOLUME knob until “ERR DP MODE” is displayed.
3. Pressing the p (CD) button sets the error history mode and displays “total rec”.
4. Select the contents to be displayed or executed using the VOLUME knob.
5. Pressing the 6 (CD) button displays or executes the contents selected.
6. Pressing the 6 (CD) button another time returns to step 4.
7. Pressing the ^ (CD) button displays “ERR DP MODE” and exits the error history mode.
8. To exit the test mode, press the REPEAT button. The unit sets into the STANDBY state, and the test mode ends.
– 4 –
ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS
Selecting the Test Mode
Display
total rec
total play
retry err
total err
err history
er refresh?
Details of History
No error
Disc error. Cannot read PTOC
(Disc is ejected out)
Disc error. UTOC error
(Disc is not ejected out)
Loading error
Cannot read address (Servo has deviated)
Displays the recording time in the form of “rππππππh”.
The displayed time is the total number of hours the laser is high power, which is about one-fourth of the actual
recording time. The time is displayed in decimal digits between 0h to 65535h.
Displays the playback time in the form of “pππππππh”.
The displayed time is the total actual play time. The paused time is not counted. The time is displayed in decimal
digits between 0h to 65535h.
Displays the total number of retries during recording and retry errors during playback in the form of “rππpππ”.
“r” indicates the retries during recording while “p” indicates the retry errors during playback. The number of
retries is displayed in hexadecimal digits between 00 to FF.
Displays the total number of errors in the form of “total ππ”.
The number of errors is displayed in hexadecimal digits between 00 to FF.
Displays the 10 latest errors in the form of “0π E@@”.
The π indicates the history number. The smaller the number, the newer is the error. (00 is the latest error.)
The @@ indicates the error code. Refer to the following table for details. Rotate the VOLUME knob to switch
the error history.
Mode which erases all the error histories.
The error history serves as a reference for when to replace the optical pick-up. Perform this procedure when the
optical pick-up has been replaced in order to erase past error histories and not at other times. Press the p (CD)
button when “er refresh??” is displayed. The history will be erased and “Complete!” will be displayed momentarily.
Be sure to check the following when this mode has been executed.
• Check that the data has been erased.
• Perform recording and playback, and check that the mechanism operates normally.
Table of Error Codes
Error Code
E00
E01
E02
E03
E04
E05
E06
E07
E08
E09
E0A
FOK has deviated
Unfocused (Servo has deviated)
Recording retry
Recording retry error
Play retry error
(Access error)
Playback retry error (C2 error)
Details of Error
Error Code
Details of Error
– 5 –
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.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
This caution
label is located
inside the unit.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED 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
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE ! SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT . NE REMPLACER CES COMPOSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS
SONT DONNÉS DANS CE MANUEL OU DANS LES
SUPPLÉMENTS PUBLIÉS P AR SONY.
PARTS No.
4-993-849-5π
4-993-849-6π
4-993-849-7π
MODEL
AEP, UK, EE model
MY, SP, JE, HK, AR, AUS model
US, CND model
MODEL IDENTIFICATION
— BACK PANEL —
• Abbreviation
CND : Canadian model
EE : East European model
HK : Hong Kong model
SP : Singapore model
MY : Malaysia model
AR : Argentine model
AUS : Australian model
JE : Tourist model
– 6 –
TABLE OF CONTENTS
1. SERVICING NOTE .......................................................... 7
2. GENERAL .......................................................................... 8
3. DISASSEMBLY
3-1. Case .................................................................................... 10
3-2. Front Panel/MD Mechanism Deck Section ........................ 10
3-3. Back Panel, Jack Board....................................................... 11
3-4. MD Mechanism Deck (MDM-3D) ..................................... 11
3-5. CD Mechanism Deck (CDM13C-5BD19).......................... 12
3-6. BD (MD) Board .................................................................. 12
3-7. Disc Table .......................................................................... 13
3-8. Sub Chassis ......................................................................... 13
3-9. Optical Pick-up (KSS-213B/K-N) ...................................... 14
3-10. Over Write Head ...............................................................14
3-11. Slider Complete ASSY...................................................... 15
3-12. Shutter ASSY .................................................................... 16
4. SERVICE MODE ............................................................. 17
5. TEST MODE ..................................................................... 18
6. ELECTRICAL ADJUSTMENTS ............................... 24
7. DIAGRAMS
7-1. Circuit Boards Location ......................................................31
7-2. Block Diagrams
• CD Section ....................................................................... 33
• MD Section ...................................................................... 35
• Main Section .................................................................... 37
7-3. Schematic Diagram – CD Section – ................................... 41
7-4. Printed Wiring Board – CD Section –................................. 43
7-5. Schematic Diagram – MD (1/3) Section –.......................... 45
7-6. Schematic Diagram – MD (2/3) Section –.......................... 47
7-7. Schematic Diagram – MD (3/3) Section –.......................... 49
7-8. Printed Wiring Board – MD Section –................................ 51
7-9. Schematic Diagram – MD Switch Section – ...................... 53
7-10. Printed Wiring Board – MD Switch Section – ................. 54
7-11. Schematic Diagram – Main (1/3) Section – ..................... 55
7-12. Schematic Diagram – Main (2/3), (3/3) Section – ........... 57
7-13 Printed Wiring Board – Main Section – ........................... 59
7-14. Schematic Diagram – Audio Section –............................. 61
7-15. Printed Wiring Board – Audio Section –.......................... 63
7-16. Schematic Diagram – Panel Section – ............................. 65
7-17. Printed Wiring Board – Panel Section –........................... 67
7-18. Schematic Diagram – Jack Section – ............................... 69
7-19. Printed Wiring Board – Jack Section – ............................ 71
7-20. Schematic Diagram – ST Terminal/Loading Section – .... 73
7-21. Printed Wiring Board – ST Terminal/Loading Section – . 74
7-22. Schematic Diagram – Trans Section – ............................. 75
7-23. Printed Wiring Board – Trans Section –........................... 76
7-24. Schematic Diagram – Power AMP Section –................... 77
7-25. Printed Wiring Board – Power AMP Section –................ 79
7-26. IC Block Diagrams ........................................................... 81
7-27. IC Pin Functions ............................................................... 88
8. EXPLODED VIEWS
8-1. Front Panel Section ............................................................. 96
8-2. Chassis Section ................................................................... 97
8-3. MD Mechanism Deck Section-1 (MDM-3J) ...................... 98
8-4. MD Mechanism Deck Section-2 (MDM-3J) ...................... 99
8-5. CD Mechanism Deck Section-1 (CDM13C-5BD19) ....... 100
8-6. CD Mechanism Deck Section-2 (BU-5BD19) ................. 100
9. ELECTRICAL PARTS LIST ...................................... 102
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. Follow the manufacturers’ instructions to use these
instruments.
2. A ba ttery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
0.15µF
To Exposed Metal
Parts on Set
1.5k
Ω
AC
voltmeter
(0.75V)
Earth Ground
– 7 –
SECTION 1
SERVICING NOTE
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
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 pickup block. Therefore, when checking the laser diode emission, 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 waveform is output three times.
Note:
Be sure to connect all wires (including FFC) in the MD
section before applying power or ICs may be damaged.
DISC TABLE GETTING OUT PROCEDURE ON THE
POWER SUPPLY IS OFF
1. Insert the tweezers to a hole on bottom of the chassis as shown a
figure, then tern fully it toward direction 2.
2. Pull out the disc table.
cam
disc table
1
tweezers
2
3
PRECAUTIONS ON REMOVING WINDOW (FL) FROM
FRONT PANEL
• Use the following procedure to prevent scratches on the front panel.
1
Remove the Knob (VOL).
2
Remove the nut.
3
Remove the
ornament (VOL).
4
Remove the window (FL) using the notch.
– 8 –
Location of Parts and Controls
1 1/u button
2 MD indicator
3 MD disc slot
4 6 (MD) button
5 ^ (MD) button and indicator
6 p (MD) button
7 VOLUME knob
8 ^ (CD) button and indicator
9 p (CD) button
10 FUNCTION button
11 MD/CD ) +/TUNING + button
12 MD/CD = 0/TUNING – button
13 TUNER/BAND button
14 6 (CD) button
15 r REC button and indicator
16 CD-MD SYNC button
17 CD disc tray
18 CD indicator
19 REPEAT/STEREO/MONO button
20 PLAY MODE/TUNING MODE button
21 PHONES jack
22 Remote sensor
23 Display window
SECTION 2
GENERAL
Front Panel
15 1213 111617 141920 1821
7
8
9
10
23 45 61
22
23
– 9 –
This section is extracted from
instruction manual.
– 10 –
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-1. CASE
3-2. FRONT PANEL/MD MECHANISM DECK SECTION
1
T wo screws
(CASE3 TP2)
2
T wo screws
(CASE3 TP2)
3
Case
1
T wo screws
(
BVTT3x6
)
2
Wire (flat type)(23core)
(CN873)
3
Connector
(CN490)
4
Claw
5
Front panel
6
Wire (flat type)(25core)
(CN820)
7
Six screws (BVTT3x6)
8
Wire
9
MD mechanism
– 11 –
3-3. BACK PANEL, JACK BOARD
3-4. MD MECHANISM DECK (MDM-3D)
1
Connector
(CN590)
2
Four screws
(BVTP3x10)
3
T wo screws
(BVTP3x10)
4
Five claws
6
Wire (flat type)(15core)
(CN401)
7
JACK board
8
Connector
(CN402)
5
Back panel
1
T wo screws
(BVTT2x3)
2
T wo screws
(BVTT2x3)
3
MD mechanism deck
(MDM-3J)
Bracket (MD)
– 12 –
3-6. BD (MD) BOARD
3-5. CD MECHANISM DECK (CDM13C-5BD19)
1
Wire (flat type)(19core)
(CN801)
2
Connector
(CN291)
3
T wo screws
(BVTT3x6)
4
T wo screws
(BVTT3x6)
5
Bracket (CD)
6
T wo screws
(BVTT3x6)
8
CD mechanism deck
(CDM13C-5BD19)
7
T wo hooks
1
Wire (flat type)(25core)
(CN107)
3
Wire (flat type)(14core)
(CN106)
5
OP relay flexible board
(CN101)
6
BD board(MD)
4
Screw (BVTP2x4)
2
Flexible board
(over write head)
(CN104)
– 13 –
3-7. DISC TABLE
3-8. SUB CHASSIS
1
Screw (BV3x8)
2
Screw (BV3x8)
3
Holder (MG) assembly
4
Pull the disc table
3
Two step screws
4
T wo insulators
5
Sub chassis
Part
A
Part
A
Part
A
1
Two step screws
2
T wo insulators
Take care so that the part
A
may be right
position when installing.
– 14 –
3-9. OPTICAL PICK-UP (KSS-213B/K-N)
3-10. OVER WRITE HEAD
1
Move the claw in the
direction of the arrow
A
.
2
Remove the sled shaft in the
direction of the arrow
B
.
3
Wire (flat type)(16 core)
(CNU101)
BD board (CD)
4
Remove the optical pick-up (KSS-213B/K-N)
in the direction of the arrow
C
.
C
B
A
1
Screw (P1.7x6)
2
Over write head
– 15 –
3-11. SLIDER COMPLETE ASSY
• Note for installation of Slider complete assembly
1
Special screw
(M1.7x1.4)
2
Retainer (gear)
3
Set the shaft of gear (LB) to be at the
position in the figure.
4
Remove the slider complete assembly
in the direction of arrow with putting out
of two claws.
45˚
Claw
Claw
Slider assembly
Part A
Install the part A of lever (head up)
to pass over the slider complete assembly.
OK
NG
Take care not to damage the
detective switch.
– 16 –
3-12. SHUTTER ASSY
1
Stopper washer
2
Shaft (shutter) A
3
Shutter assembly
Shaft (shutter) A
shutter assembly
Shaft (shutter) B
Hole B
Hole A
When installing, install the shaft (shutter) A into the hole as
show in the figure before installing the shaft (shutter) B into
the hole B.
– 17 –
Change-over of AM (MW) Tuner Step between 9 kHz and 10 kHz
• A step of AM (MW) channels can be changed over between 9 kHz and 10 kHz.
Procedure:
1. Press 1/u button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND button to select the BAND “AM (MW)”.
3. Press 1/u button to turn the set OFF.
4. Press FUNCTION and 1/u buttons simultaneously, and the display of fluorescent indicator tube changes to “ AM (MW) 9 kHz STEP”
or “AM (MW) 10 kHz STEP”, and thus the channel step is changed over.
Change-over of LW Tuner Step between 1 kHz and 3 kHz
• A step of LW channels can be changed over between 1 kHz and 3 kHz.
Procedure:
1. Press 1/u button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND button to select the BAND “LW”.
3. Press 1/u button to turn the set OFF.
4. Press FUNCTION and 1/u buttons simultaneously , and the display of fluorescent indicator tube changes to “LW 1 kHz STEP” or “L W
3 kHz STEP”, and thus the channel step is changed over.
LED and Fluorescent Indicator Tube All Lit, Key Check Mode
Procedure:
1. Press PLAY MODE and p (MD) buttons simultaneously.
2. LEDs and fluorescent indiator tube are all turned on.
3. When the FUNCTION button is pressed, the fluorescent indicator tube lights up in the order of; partial lighting 1 n partial lighting 2 n
all lit n partial lighting 1 n ······.
When the VOLUME knob is rotated, the LED lighting pattern changes.
To end without switching to the key check mode, press the 1/u button to turn off the power.
4. Press p (CD) button, and the key check mode is activated.
5. In the key check mode, the fluorescent indicator tube displays “KEY=0 JOG=0”. Each time a button is pressed, “KEY=” value increases.
However, once a button is pressed, it is no longer taken into account.
“JOG=” Value increases like 1, 2, 3 ... if rotating VOLUME knob in clockwise direction, or it decreases like 10, 9, 8 ... if rotating in
counterclockwise direction.
6. T o exit from this mode , press order all buttons (15 buttons), the displays “KEY=OK”, and press any button, or disconnect the power cor d.
SUB CLOCK CHECK
Procedure:
1. Connect an oscilloscope to IC601 pin (¡ and ground of the MAIN board.
2. Press PLAY MODE and p (MD) buttons simultaneously, and the fluorescent indiator tube displays “32.768 kHz (91)”.
3. To check the signal on oscilloscope becomes 32 kHz square wave.
4. Press 1/u button to exit.
SECTION 4
SER VICE MODE
– 18 –
SECTION 5
TEST MODE
5-1. PRECAUTIONS FOR USE OF TEST MODE
Recording Laser Emission Mode and Operating Buttons
• Continuous recording mode (CREC MODE)
• Traverse adjustment mode (EFBAL ADJUST)
• Laser power adjustment mode (LDPWR ADJUST)
• Laser power check mode (LDPWR CHECK)
• Traverse (MO) check (EF MO CHECK)
• Traverse (MO) adjustment (EF MO ADJUST)
5-2. SETTING THE TEST MODE
With the power off, press the ^ (MD) button while pressing the PLAY MODE button.
5-3. EXITING THE TEST MODE
Press the REPEAT button. The STANDBY state will be set and the test mode will be cleared.
5-4. BASIC OPERATIONS OF THE TEST MODE
All operations are performed using the VOLUME knob, p (CD) button, and ^ (CD) button.
The functions of these buttons are as follows.
Function name
VOLUME knob
p (CD) button
^ (CD) button
Function
Changes parameters and modes
Proceeds onto the next step. Finalizes input.
Returns to previous step. Stops operations.
– 19 –
5-5. SELECTING THE TEST MODE
There are altogether 26 test modes, shown in the following table. Rotating the VOLUME knob to the right switches to the mode below the
current mode in the table while rotating to the left switches to the mode above. Each time the ^ (CD) button is pressed, the display changes
in the following order;
“TEMP CHECK” n ”TEMP ADJUST” n ”SLED MOVE” n“TEMP CHECK”…
Display
TEMP CHECK
LDPWR CHECK
EF MO CHECK
EF CD CHECK
FBIAS CHECK
CPLAY MODE
CREC MODE
Scurve CHECK
VERIFY MODE
DETRK CHECK
TEMP ADJUST
LDPWR ADJUST
EF MO ADJUST
EF CD ADJUST
FBIAS ADJUST
EEP MODE
MANUAL CMD
SVDATA READ
ERR DP MODE
SLED MOVE
ACCESS MODE
0920 CHECK
WRITE sure?
HEAD ADJUST
CPLAY2 MODE
CREC2 MODE
Ver @@@@@
Contents
Temperature compensation offset check
Laser power check
Traverse (MO) check
Traverse (CD) check
Focus bias check
Continuous playback mode
Continuous recording mode
S curve check
Non-volatile memory check
Detrack check
Temperature compensation offset adjustment
Laser power adjustment
Traverse (MO) adjustment
Traverse (CD) adjustment
Focus bias adjustment
Nonvolatile memory control
Command transfer
Status display
Error history display, clear
Sled check
Access check
Outermost circumference check
Non-volatile memory Initialize
Head position check
Continuous playback mode
Continuous recording mode
Microprocessor version display
Mark
(X)
(X)
(X)
(X) (!)
(X)
(X)
(X)
(X)
(X)
(X) (!)
(X)
(X)
(X)
• For details of each adjustment mode, refer to the items in “6. Electrical Adjustments”. For details of “ERR DP MODE”, refer to the self-
diagnosis function on page 2.
• If other modes are set accidentally, press the ^ (CD) button to exit that mode.
• As items marked (X) in the “Mark” column are not used during servicing, they are not described here. If these modes are set accidentally,
press the ^ (CD) button to exit the mode. Be especially careful with items marked (!) as they will overwrite the non-volatile memory,
and as a result, the unit will not operate normally.
5-5-1. Operating the Continuous Playback Mode
1. Entering the continuous playback mode
1 Set the disc in the unit. (Recordable discs or discs for playback only.)
2 Rotate the VOLUME knob and display “CPLAY MODE”.
3 Press the p (CD) button to change the display to “CPLAY MID”.
4 When access completes, the display changes to “C =
AD = ”.
Note : The numbers “
” displayed indicate the error rates and “ADER”.
2. Changing the part to be played back
1 When the p (CD) button is pressed during continuous playback, the display changes as below, and the played back part can be
changed.
2 When access completes, the display changes to “C1 =
AD = ”.
Note : The numbers “
” displayed indicate the error rate and “ADER”.
“CPLAY MID” n “CPLAY OUT” n “CPLAY IN”
– 20 –
Contents
Sets continuous playback when pressed in the STOP state. T urns ON/OFF the tracking serv o when pressed during continuous
playback.
Stops the continuous playback and recording.
Moves the sled to the external circumference only while the button is pressed.
Moves the sled to the internal circumference only while the button is pressed.
Switches between pit and groove when pressed.
Switches the displayed contents when pressed.
Ejects the disc.
Exits the test mode.
Function
·P
p
) +
= 0
CD-MD SYNC
1/u
6 (MD)
REPEAT
“CPLAY MID” n “CPLAY OUT” n “CPLAY IN”
3. Ending the continuous playback mode
1 Press the ^ (CD) button. The display changes to “CPLAY MODE”.
2 Press the 6 (MD) button to remove the disc.
Note : The playback start addresses for IN, MID, and OUT are as follows. To display the playbac k position address on the display, press
the 1/u button to display “CPLAY (
)”.
IN: 40h cluster
MID: 300h cluster
OUT: 700h cluster
5-5-2. Operating the Continuous Recording Mode
1. Entering the continuous recording mode
1 Set a recordable disc in the unit. (Refer to Note 3.)
2 Rotate the VOLUME knob and display “CREC MODE”.
3 Press the p (CD) button to change the display to “CREC MID”.
4 When access completes, the display changes to “CREC ( )” and the REC display lights up.
Note : The numbers “
” displayed indicate the recording position address.
2. Changing the part to be recorded
1 When the p (CD) button is pressed during continuous recording, the display changes as below and the recorded part can be changed.
The REC display is off while changing.
2 When access completes, the display changes to “CREC MODE” and the REC display lights up.
Note : The numbers “
” displayed indicate the recording position address.
3. Ending the continuous recording mode
1 Press the ^ (CD) button. The display changes to “CREC (
)”, and the REC display lights up.
2 Press the 6 (MD) button to remove the disc.
Note 1 : The recording start addresses for IN, MID, and OUT are as follows.
IN: 40h cluster
MID: 300h cluster
OUT: 700h cluster
Note 2 : The ^ (CD) button can be used to stop recording anytime.
Note 3 : Do not perform continuous recording for long periods of time above 5 minutes.
Note 4 : During continuous recording, be careful not to apply vibration.
5-5-3. Non-Volatile Memory Mode (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 ^ (CD) button immediately to exit it.
5-6. FUNCTIONS OF OTHER BUTTONS
– 21 –
5-7. DISPLAYS DURING TEST MODE
The display changes according to the following sequence each time the 1/u button is pressed.
1. Mode display
“TEMP ADJUST” and “CPLAYMODE” are displayed.
2. Error rate display
The error rate is displayed as follows.
C =
AD =
C = :Indicates the C1 error.
AD = :Indicates ADER.
3. Address display
The address is displayed as follows. (MO: Recordable disc, CD: Disc for palyback only)
When the CD-MD SYNC button is pressed, the display will switch between groove
and pit.
h =
s = (MO pit and CD)
h =
a = (MO groove)
h = Indicates the header address.
s = Indicates the SUBQ address.
a = Indicates the ADIP address.
Note: Displayed as “–” when servo is operated.
4. Auto gain display (Not used in servicing)
The auto gain is displayed as follows.
AG =
/ .
5. Detrack check display (Not used in servicing)
The detrack is displayed as follows.
ADR =
6. IVR display (Not used in servicing)
IVR is displayed as follows.
[
][ ][
Meanings of other displays
Mode display
Error rate display
Address display
Auto gain display (Not used in servicing)
Detrack check display (Not used in servicing)
IVR display (Not used in servicing)
REC
ATT
OVER
SHUFFLE
TRACK
DISC
LEVEL-SYNC
SYNC
When Off
Contents
Display
When Lit
Recording mode ON
ABCD adjustment completed
Tracking offset cancel ON
Focus auto gain OK
Pit
High reflection rate
CLV-S
CL V LOCK
Recording mode OFF
Tracking offset cancel OFF
Groove
Low reflection
CLV-A
CL V UNLOCK
– 22 –
5-8. AGING MODE
This unit is provided with an aging mode.
In this mode, MD and CD operations are performed alternately according to the following sequence.
Aging will be carried out continuously unless an error occurs.
If an error occurs, the status and number of cycles are displayed alternately, and operations stop. (Refer to Table 1.)
Aging Mode Sequence
NO
NO
YES
YES
OK?
NO
OK?
NO
NO
YES
OK?
OK?
NO
OK?
NO
OK?
NO
OK?
NO
YES
YES
YES
YES
YES
OK
YES
NG
Start
Turn ON Power using function MD
MD TOC READ
Cannot read
Message 6
Can read
MD all erase
Above 20
MD last track
Less than 20
Blank disc
Message 1
CD function is set and CD TOC is read
CD TOC OK?
Message 7
CD synchro standby
Message 2 or 8
CD last track search pause state
Message 9
CD synchro starts
Message 3 or 0
Synchro ends?
MD function is set
Playing CD?
CD tray opens
Message !¡
Message !º
CD tray closes
Message !™
MD last track (for 3 sec.) play
Message 4
Power goes off and MD TOC is written
Aging cycle number is displayed
Power turns ON and MD TOC is read
Message 5 or Message 6
– 23 –
Procedure:
1. Load a recordable disc (MD) and CD test disc (YEDS-18). (*Note 1)
2. While pressing the PLAY MODE button, press the ^ (CD) button.
3. Aging is executed in the above sequence.
4. To end, press the p (CD or MD) button.
*Note 1: Any CD can be used, but one with a short last track is recommended. The time of one aging cycle will be longer if the last track is
long.
Also use a CD in which the length of the last track x 20 does not exceed the recording time of the recording MD.
Table 1. Messages and Main Causes When Aging Stops
A disc for playback only was used. The rec-proof tab is set to
protect. Disc error, etc.
Disc is full, etc.
Access error, etc.
No. of total tracks does not match logic value.
Disc error, etc.
Optical defect, spindle defect (including motor), cannot read
Q data, disc defect (scratches, etc.), bad focus, bad GFS, etc.
Disc defect (scratches, etc.), cannot read Q data, etc.
Optical defect, sled, tracking defect (including motor), cannot
read Q data, disc defect (scratches, etc.).
Optical defect, cannot read Q data, disc defect (scratches, etc.),
etc.
LOAD OUT SW defect
LOAD IN SW defect
No
Error Messages
Details of Error
1
2
3
4
5
6
7
8
9
0
!¡
!™
MD A Erase NG
MD R-Pause NG
MD D-input NG
MD Play NG
MD TOC NG
MD No Disc NG
CD No Disc NG
CD Pause NG
CD Search NG
CD Play NG
CD Open NG
CD Close NG
Cannot MD all erase.
Cannot set MD Rec Pause.
Cannot lock MD digital in.
Cannot play last track.
MD TOC are different.
Cannot read MD TOC.
Cannot read CD TOC.
Cannot set CD pause in
CD synchro mode.
Cannot search last track on CD.
Cannot play last track on CD.
Cannot open CD tray.
Cannot close CD tray.
Main Causes
– 24 –
MD SECTION
6-1. PRECAUTIONS FOR CHECKING LASER DIODE
EMISSINON
When checking the emission of the laser diode during adjustments,
never view directly from the top as this may cause blindness.
6-2. 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, solder first. Before connecting
the connector, be careful not to remove the solder. Also take adequate measures to prevent damage by static electricity . Handle the
flexible board with care as it breaks easily.
Optical pick-up flexible board
6-3. PRECAUTIONS FOR ADJUSTMENTS
1) When r eplacing the following parts, perform adjustments and
checks marked ¬ in the order shown in the following table.
Optical
Pick-up
BD Board
IC101, IC121, IC192
D101
IC171
pick-up
flexible board
laser tap
1.Temperature
compensation
offset adjustment
2.Laser power
adjustment
3.Traverse
adjustment
4.Focus bias
adjustment
5.Error rate check
¬¬G¬
¬G¬¬
¬G¬¬
¬G¬¬
¬G¬¬
2) Perform the adjustment in the test mode.
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 (MD) TDYS-1
(Parts No. 4-963-646-01)
• Laser power meter LPM-8001 (Parts No. J-2501-046-A)
or
MD Laser power meter 8010S (Parts No. J-2501-145-A)
• Oscilloscope (Measure after calibration of the probe).
• Digital voltmeter
• Thermometer
5) When observing several signals on the oscilloscope, etc., make
sure that VC and ground do not connect inside the oscilloscope.
(The VC and ground will short-circuit.)
Note : When performing laser power checks and adjustment
(electrical adjustment), use of the new MD laser po wer meter
8010S (J-2501-145-A) instead of the conventional laser
power meter is convenient.
It sharply reduces the time and trouble to set the laser power
meter sensor onto the objective lens of the pick-up.
6-4. CREATING THE CONTINUOUSLY RECORDED
DISC
• The disc is used for the focus bias adjustment and error rate check.
The following describes how to create a continuously recorded
disc.
1. Insert a disc (blank disc) commercially available.
2. Rotate the VOLUME knob to display “CREC MODE”.
3. Press the p (CD) button to display “CREC MID”.
“CREC (0300)” will be momentarily displayed and recording
started.
4. Complete recording within 5 minutes.
5. Press the ^ (CD) button and stop recording .
6. Press the 6 (MD) button and remove the disc.
Create the continuous recorded disc for adjusting the focus bias
and checking the error rate as described above.
Note :
• Be careful not to apply vibrations during continuous recording.
6-5. TEMPERATURE COMPENSATION OFFSET
ADJUSTMENT
Save the current temperature data in the non-volatile memory as
the 25 °C standard data.
Notes:
1. Normally, this adjustment should not be preformed.
2. Set the surrounding temperature to 22 to 28 °C when performing
this adjustment.
Also perform this adjustment immediately after the power is
turned on when the internal temperature of the unit is the same
as the surrounding temperature (22 to 28 °C).
3. After replacing D101, perform this adjustment after the
temperature of parts reach the surrounding temperature.
Adjusting Procedure:
1. Rotate the VOLUME knob, to display “TEMP ADJUST”.
2. Press the p (CD) button and select the “TEMP ADJUST” mode.
3. “TEMP=
” and the current temperature data are displayed.
4. To save the data: Press the p (CD) button.
If not saving the data: Press the ^ (CD) button.
5. When the p (CD) button is pressed, “TEMP=
SAVE” is
displayed, and then “TEMP ADJUST” is displayed again.
“TEMP ADJUST” is displayed again immediately after the ^
(CD) button is pressed.
Specifications:
TEMP=
should be E0 to EF. F0 to FF, 00 to 0F, 10 to 1F and 20
to 2F.
SECTION 6
ELECTRICAL ADJUSTMENTS
– 25 –
6-6. LASER POWER ADJUSTMENT
Connection :
KMS
260A
27X40
B0825
N
Iop = 82.5 mA in this case
Iop (mA) = Digital voltmeter reading (mV)/1 (
Ω
)
6-7. TRA VERSE ADJUSTMENT
Connection :
Adjusting Procedure:
1. Connect an oscilloscope to TP (TEO) and TP (VC) of CN110 of
the BD (MD) board.
2. Load a recordable disc (any available on the market). (Refer to
Note 1.)
3. Press the = 0 or ) + button to move the optical
pick-up outside the pit.
4. Rotate the VOLUME knob to display “EFBAL ADJUST”.
5. Press the p (CD) button to display “EFB =
MO-R”.
(Laser power READ power/Focus servo ON/trac king servo OFF/
spindle (S) servo ON)
6. Rotate the VOLUME knob so that the oscilloscope waveform
becomes the specified value. (Rotating the VOLUME knob
changes the “EFB= ” value and the wa veform.) The wav eform
changes by about 2% everytime when adjusted. Adjust as close
as possible to the specified value.
(Read power traverse adjustment)
(Tr a verse Wavef orm)
7. Press the p (CD) button and sav e the adjustment results in the
non-volatile memory (displayed as “EFB =
SAVE”
momentarliy and then displayed as “EFB =
MO-W”).
8. Rotate the VOLUME knob so that the oscilloscope waveform
becomes the specified value.
(Rotating the VOLUME knob changes the “EFB=
” value
and the waveform.) The waveform changes by about 2%
everytime when adjusted. Adjust as close as possible to the
specified value.
(Write Power Traverse Adjustment)
(Tr a verse Wavef orm)
Laser power
meter
Optical pick-up
objective lens
Digital volt mete
r
TP (I+3V)
TP (IOP)
BD (MD) board
Adjusting Procedure:
1. Set the laser power meter on the objective lens of the optical
pick-up from the disc slot. (If it cannot be set properly , press the
= 0 or ) + button to move the optical pick-up).
Connect the digital voltmeter to TP (I+3V) and TP (IOP) of the
BD (MD) board.
2. Rotate the VOLUME knob to display “LDPWR ADJUST”.
(Laser power: For adjustment)
3. Press the p (CD) button once to display “LD 0.9 mW $
”.
4. Rotate the V OLUME knob so that the laser power meter reads
0.86 to 0.92 mW . Set the r ange knob of the laser power meter to
10 mW , press the p (CD) button, and sa ve the adjustment results
in the non-volatile memory. (“LD SAVE $
” is displayed
momentarily.)
5. “LD 7.0 mW $
” is next displayed.
6. Rotate the V OLUME knob so that the laser power meter reads
6.9 to 7.1 mW , press the p (CD) button, and sav e the adjustment
results in the non-volatile memory . (“LD SAVE $
” is displayed
momentarily.)
Note: Do not emit 7.0 mW continuously for more than 15 seconds.
7. Rotate the VOLUME knob to display “LDPWR CHECK”.
8. Press the p (CD) button once to display “LD 0.9 mW $
”.
Check that the laser power meter reading is 0.85 to 0.91 mW.
9. Press the p (CD) button another time to diaplay “LD 7.0 mW
$
”.
Check that the readings of the laser power meter and digital
voltmeter become the specified value.
Specified Value :
Laser power meter reading : 7.0 ± 0.1 mW
Digital voltmeter reading : Value displayed on optical pick-up label
± 10%
(Optical pick-up label)
10. Press the ^ (CD) button to display “LDPWR CHECK” and
stop the laser emission.
(The ^ (CD) button is effective at all times to stop the laser
emission.)
VC
A
B
Specified value : A = B
VC
A
B
Specified value : A = B
9. Press the p (CD) button to save the adjustment results in the
non-volatile memory (displayed as “EFB =
SAVE”
momentarliy).
Oscilloscope
TP (TEO)
TP (VC)
BD (MD) board
– 26 –
10. Next “EFB = MO-P” is displaed, the optical pick-up moves
to the internal circumference of the pit and servo is imposed.
11. Rotate the VOLUME knob so that the oscilloscope wav eform
becomes the specified value.
The waveform changes by about 2% everytime when adjusted.
Adjust as close as possible to the specified value.
(Trav erse Waveform)
12. Press the p (CD) button and save the adjustment results in the
non-volatile memory (displayed as “EFB =
SAVE”
momentarliy).
“EFBAL: CD is next displayed and the disc stops rotating
automatically.
13. Press the 6 (MD) button and remove the disc.
14. Load the check disc (MD) TDYS-1.
15. Press the p (CD) button to display “EFB =
CD”. The servo
is imposed automatically.
16. Rotate the VOLUME knob so that the oscilloscope wav eform
becomes the specified value.
The waveform changes by about 2% everytime when adjusted.
Adjust as close as possible to the specified value.
(Trav erse Waveform)
17. Press the p (CD) button and save the adjustment results in the
non-volatile memory after “EFB =
SAVE” is momentarliy
displayed.
“EFBAL ADJUST” is next displayed.
18. Press the 6 (MD) button and remove the check disc (MD)
TDYS-1.
Note 1 : The data will be overwritten on the MO and erased when a
recorded disc is used in this adjustment.
Note 2 : If the traverse waveform is not clear, connect the oscillo-
scope as shown in the following figure so that it can be
seen more clearly.
VC
A
B
Specified value : A = B
VC
A
B
Specified value : A = B
330 k
Ω
Oscilloscop
e
10pF
BD (MD) board
TP (TEO)
TP (VC)
6-8. FOCUS BIAS ADJUSTMENT
Adjusting Procedure :
1. Load a continuously recorded disc (Refer to 6-4. Creating the
Continuously Recorded Disc”).
2. Rotate the VOLUME knob to display “CPLAY MODE”.
3. Press the p (CD) button to display “CPLAY MID”.
4. When “C1 = AD = ” is displayed, pr ess the ^ (CD)
button.
5. Rotate the VOLUME knob to display “FBIAS ADJUST”.
6. Press the p (CD) button to display “
/ a = ”.
The first four digits indicate the C1 error rate, the two digits
after the “/” indicate ADER and the tw o digits after “a =” indicate
the focus bias value.
7. Rotate the V OLUME knob in the clockwise direction, and look
for the focus bias value at which the C1 error rate becomes
approximately approx. 200. (Refer to Note 2).
8. Press the p (CD) button to display “
/ b = ”.
9. Rotate the VOLUME knob in the counterclockwise direction,
and look for the focus bias value at which the C1 error rate
becomes approx. 200.
Check that the C1 error rate becomes almost equal to the value
set in step 7.
10. Press the p (CD) button to display “
/ c = ”.
11. Check that the C1 error rate is below 50 and that ADER is 00.
and press the p (CD) button.
12. If the value of “(
)” in the “ - - ( )” displayed is
above 20, press the p (CD) button.
If below , press the ^ (CD) button and start from ste p 2 again.
13. Press the 6 button and remov e the continuously recorded disc.
Note 1 : The following figure shows the relation between the C1
error and focus bias value. Look for points a and b in the
following figure by the adjustment avove. The focus
position (point c) is automatically calculated from points
a and b.
Note 2 : As the C1 error rate changes, use the average value in the
adjustment.
C1 error
approx.
200
b
c a Focus bias value
(F. BIAS)
– 27 –
6-9. ERROR RATE CHECK
6-9-1. CD Error Rate Check
Checking Procedure :
1. Load a check disc (MD) TDYS-1.
2. Rotate the VOLUME knob to display “CPLAY MODE”.
3. Press the p (CD) button to display “CPLAY MID”.
4. “C1 =
AD = ” is displayed.
5. Check that the C1 error rate is below 20.
6. Press the ^ (CD) button to stop playback. Then press the
6 (MD) button, and remove the check disc (MD).
6-9-2. MO Error Rate Checking
Checking Procedure :
1. Load a continuously recorded disc (Refer to 6-4. Creating the
Continuously Recorded Disc”).
2. Rotate the VOLUME knob to display “CPLAY MODE”.
3. Press the p (CD) button to display “CPLAY MID”.
4. “C1 =
AD = ” is displayed.
5. Check that the C1 error rate is below 50 and ADER is 00.
6. Press the ^ (CD) button to stop playback. Then press the
6 (MD) button, and remove the disc.
6-10. FOCUS BIAS CHECK
Change the focus bias value and check the focus tolerance amount.
Checking Procedure :
1. Load a continuously recorded disc (Refer to 6-4. Creating the
Continuously Recorded Disc”).
2. Rotate the VOLUME knob to display “CPLAY MODE”.
3. Press the p (CD) button to display “CPLAY MID”.
4. When “C1 =
AD = ” is displayed, press the ^ (CD)
button.
5. Rotate the VOLUME knob to display “FBIAS CHECK”.
6. Press the p (CD) button to display “
/ c = ”.
The first four digits indicate the C1 error, the tw o digits after the
“/” indicate ADER and the two digits after “c =” indicate the
focus bias value.
Check that the C1 error is below 50 and ADER is 00.
7. Press the p (CD) button to change the display to “ / b =
”.
Check that the C1 error does not drop below 220 and ADER
does not remain above 00.
8. Press the p (CD) button to change the display to “
/ a =
”.
Check that the C1 error does not drop below 220 and ADER
does not remain above 00.
9. Press the ^ (CD) button, press the 6 (MD) button next, and
remove the continuously recorded disc.
Note 1 : If the C1 error is above 220 or ADER is above 00 only for
point a (step 8 above) and point b (step 7 above), the focus
bias may not adjusted properly. In this case, adjust again.
– 28 –
6-11. ADJUSTING POINTS AND CONNECTING POINTS
[BD (MD) BOARD] (SIDE A)
D101
IC192
IC171
IC101
Q102
IC121
IC316
Q163
TP (IOP)
TP
(VC)
TP
(TEO)
TP (I + 3V)
[BD (MD) BOARD] (SIDE B)
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