Sony MDS-JE640 User's manual

Sony MDS-JE640 User's manual
MDS-JE640
SERVICE MANUAL
Canadian Model
AEP Model
UK Model
E Model
Photo: SILVER
US and foreign patents licensed form Dolby Laboratories
Licensing Corporation.
Model Name Using Similar Mechanism
NEW
MD Mechanism Type
MDM-7A
Optical Pick-up Type
KMS-260B/J1N
SPECIFICATIONS
System
MiniDisc digital audio system
Inputs
Disc
Laser
MiniDisc
Semiconductor laser (λ = 780 nm)
Emission duration: continuous
MAX 44.6 µW1)
ANALOG IN
Jack type: phono
Impedance: 47 kΩ
Rated input: 500 mVrms
Minimum input: 125 mVrms
DIGITAL IN
Connector type: square optical
Impedance: 660 nm (optical wave
length)
DIGITAL OPTICAL IN
(AEP, UK, CIS models)
Connector type: square optical
Impedance: 660 nm (optical wave
length)
Jack type: phono
Impedance: 75 Ω
Rated input: 0.5 Vp-p, ±20 %
Laser output
1) 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
Revolutions (CLV)
Material: GaAlAs
400 rpm to 900 rpm
Error correction
ACIRC (Advanced Cross Interleave
Reed Solomon Code)
Sampling frequency
Coding
44.1 kHz
ATRAC (Adaptive TRansform
Acoustic Coding)/ATRAC 3
PHONES (MDS-JE640
only)
Modulation system
EFM (Eight-to-Fourteen
Modulation)
Jack type: stereo phone
Rated output: 28 mW
Load impedance: 32 Ω
ANALOG OUT
Number of channels
Frequency response
2 stereo channels
5 to 20,000 Hz ±0.3 dB
Jack type: phono
Rated output: 2 Vrms (at 50
kΩ)
Load impedance: over 10 kΩ
Signal-to-noiseratio
Over 98 dB during play
Wow and flutter
Below measurable limit
DIGITAL COAXIAL IN
(AEP, UK, CIS models)
Outputs
— Continued on next page —
MINIDISC DECK
DIGITAL OUT
Connector type: square optical
Rated output: –18 dBm
Load impedance: 660 nm (optical
wave length)
DIGITAL OPTICAL OUT Connector type: square optical
(AEP, UK, CIS models) Rated output: –18 dBm
Load impedance: 660 nm (optical
wave length)
General
Power requirements
Where purchas ed
Canadian
Power requir ements
120 V AC, 60 Hz
AEP, UK, CIS
220 – 230 V AC, 50/60 Hz
Singapore, Malaysia
110 – 120 or 220 – 240 V AC
selectable, 50/60 Hz
Power consumption
15 W
Dimensions (approx.)
430 × 95 × 285 mm (17 × 3 3/4 ×
11 1/4 in.) (w/h/d) incl. projecting
parts and controls
3.1 kg (6 lbs 14 oz)
Mass (approx.)
Supplied accessories
• Audio connecting cords (2)
• Optical cable (1)
• Remote commander (remote) (1)
• R6 (size-AA) batteries (2)
US and foreign patents licensed from Dolby Laboratories.
Design and specifications are subject to change without
notice.
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 SelfDiagnosis Function (Error History Display Mode)”.
Self-diagnosis function
The deck’s self-diagnosis function automatically checks
the condition of the MD deck when an error occurs, then
issues a three- or five-digit code and an error message on
the display. If the code and message alternate, find them in
the following table and perform the indicated
countermeasure. Should the problem persist, consult your
nearest Sony dealer.
Three- or fivedigit code/
Message
C11/Protected
C12/Cannot Copy
C13/REC Error
C13/Read Error
Three- or fivedigit code/
Message
Cause/Remedy
C14/Toc Error
The deck could not read the TOC on the
MD properly.
, Insert another disc.
, If possible, erase all the tracks on the
MD (page 32).
C41/Cannot Copy
The sound source is a copy of
commercially available music software, or
you tried to record a CD-R (Recordable
CD).
, The Serial Copy Management System
prevents making a digital copy
(page 52). You cannot record a CD-R.
Cause/Remedy
The inserted MD is record-protected.
, Take out the MD and close the recordprotect slot (page 14).
You tried to record a CD with a format
that the external device connected to the
deck does not support, such as CD-ROM
or video CD.
, Remove the disc and insert a music
CD.
The recording was not made properly.
, Set the deck in a stable surface, and
repeat the recording procedure.
The inserted MD is dirty (with smudges,
fingerprints, etc.), scratched, or
substandard in quality.
, Replace the disc and repeat the
recording procedure.
The deck could not read the TOC on the
MD properly.
, Take out the MD and insert it again.
The sporadic appearance of this message
is caused by the digital signal being
recorded. This will not affect the
recording.
C71/Din Unlock
E0001/
MEMORY NG
E0101/
LASER NG
While recording from a digital component
connected through the DIGITAL IN
connector, the digital connecting cable
was unplugged or the digital component
turned off.
, Connect the cable or turn the digital
component back on.
There is an error in the internal data that
the deck needs in order to operate.
, Consult your nearest Sony dealer.
There is a problem with the optical
pickup.
, The optical pick-up may have failed.
Consult your nearest Sony dealer.
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
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.
2
1. While pressing the AMS knob and x button, connect the power plug to the outlet, and release the AMS knob and x button.
When the test mode is set, “[Check]” will be displayed.
2. Rotate the AMS knob and when “[Service]” is displayed, press the YES button.
3. Rotate the AMS knob and display “Err Display”.
4. Pressing the YES button sets the error history mode and displays “op rec tm”.
5. Select the contents to be displayed or executed using the AMS knob.
6. Pressing the AMS knob will display or execute the contents selected.
7. Pressing the AMS knob another time returns to step 4.
8. Pressing the MENU/NO button displays “Err Display” and exits the error history mode.
9. To exit the test mode, press the REPEAT button. The unit sets into the STANDBY state, the disc is ejected, and the test mode ends.
ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS
Selecting the Test Mode
Display
History
op rec tm
Displays the total recording time.
When the total recording time is more than 1 minute, displays the hour and minute
When less than 1 minute, displays “Under 1 min”
The display time is the time the laser is set to high power, which is about 1/4 of the actual recording time.
op play tm
Displays the total playback time.
When the total playback time is more than 1 minute, displays the hour and minute
When less than 1 minute, displays “Under 1 min”
spdl rp tm
Displays the total rotating time of the spindle motor.
When the total rotating time is more than 1 minute, displays the hour and minute
When less than 1 minute, displays “Under 1 min”
retry err
Displays the total number of retry errors during recording and playback
Displays “r xx p yy”. xx is the number of errors during recording. yy is the number of errors during playback.
This is displayed in hexadecimal from 00 to FF.
total err
Displays the total number of errors
Displays “total xx”. This is displayed in hexadecimal from 00 to FF.
err history
Displays the past ten errors.
Displays “0x [email protected]@”.
X is the history number. The younger the number, the more recent is the history (00 is the latest). @@ is the error
code.
Select the error history number using the AMS knob.
retry adrs
Displays the past five retry addresses.
Displays “xx ADRS yyyy”, xx is the history number, yyyy is the cluster with the retry error.
Select the error history number using the AMS knob.
er refresh
Mode for erasing the error and retry address histories
Procedure
1. Press the AMS knob when displayed as “er refresh”.
2. Press the YES button when the display changes to “er refresh?”.
When “complete!” is displayed, it means erasure has completed.
Be sure to check the following after executing this mode.
*Data has been erased.
*Perform recording and playback, and check that the mechanism is normal.
op change
Mode for erasing the total time of op rec tm, op play tm.
These histories are based on the time of replacement of the optical pickup. If the optical pick-up has been replaced,
perform this procedure and erase the history.
Procedure
1. Press the AMS knob when displayed as “op change”.
2. Press the YES button when the display changes to “op change?”.
When “Complete!” is displayed, it means erasure has completed.
spdl change
Mode for erasing the total spdl rp tm time
These histories are based on the time of replacement of the spindle motor. If the spindle motor has been replaced,
perform this procedure and erase the history.
Procedure
1. Press the AMS knob when displayed as “spdl change”
2. Press the YES button when the display changes to “spdl change?”
When “Complete!” is displayed, it means erasure has completed.
3
Table of Error Codes
Error Code
TABLE OF CONTENTS
Description
1. SERVICING NOTES ............................................. 5
10
Could not load
12
Loading switches combined incorrectly
20
Timed out without reading the top of PTOC
21
Could read top of PTOC, but detected error
22
Timed out without accessing UTOC
23
Timed out without reading UTOC
24
Error in UTOC
30
Could not start playback
31
Error in sector
40
Retry cause generated during normal recording
41
Retried in DRAM overflow
42
Retry occurred during TOC writing
43
Retry aborted during S.F editing
50
Other than access processing, and could not read address.
51
Focus NG occurred and overran.
2. GENERAL ........................................................................ 11
3-1. Upper Case (408226) .......................................................... 12
3-2. Front Panel Section ............................................................. 12
3-3. Main Board ......................................................................... 13
3-4. PT Board, VOL-SEL Board ................................................ 13
3-5. Mechanism Deck Section (MDM-7A) ................................ 14
3-6. BD Board ............................................................................ 14
4. TEST MODE ..................................................................... 15
5. ELECTRICAL ADJUSTMENTS ............................... 20
6. DIAGRAMS
MODEL IDENTIFICATION
— BACK PANEL —
Part No.
MODEL
3. DISASSEMBLY
PARTS No.
6-1. Circuit Boards Location ...................................................... 31
6-2. Block Diagrams
• BD Section ....................................................................... 32
• Main Section .................................................................... 33
6-3. Printed Wiring Board – BD Section – ................................. 35
6-4. Schematic Diagram – BD Section (1/2) – ........................... 36
6-5. Schematic Diagram – BD Section (2/2) – ........................... 37
6-6. Printed Wiring Board – Main Section (Side A) – ............... 38
6-7. Printed Wiring Board – Main Section (Side B) – ............... 39
6-8. Schematic Diagram – Main Section (1/3) – ........................ 40
6-9. Schematic Diagram – Main Section (2/3) – ........................ 41
6-10. Schematic Diagram – Main Section (1/3) – ..................... 42
6-11. Printed Wiring Board – Power Section – ......................... 43
6-12. Printed Wiring Board – Display Section – ....................... 44
6-13. Schematic Diagram – Display Section – .......................... 45
6-14. IC Block Diagrams ........................................................... 46
6-15. IC Pin Functions ............................................................... 48
AEP, UK, CIS models
4-228-638-0s
Canadian model
4-228-638-3s
7. EXPLODED VIEWS
SP, MY models
4-228-638-4s
7-1. Chassis Section ................................................................... 54
7-2. Front Panel Section ............................................................. 55
7-3. Mechanism Section-1 (MDM-7A) ...................................... 56
7-4. Mechanism Section-2 (MDM-7A) ...................................... 57
• Abbreviation
SP
: Singapore model
MY
: Malaysia model
8. ELECTRICAL PARTS LIST ........................................ 58
4
SECTION 1
SERVICE NOTES
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
Never look into the laser diode emission from right above when
checking it for adjustment. It is feared that you will lose your sight.
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.
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.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 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 IDENTIFÉS PAR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
5
JIG FOR CHECKING BD BOARD WAVEFORM
The special jig (J-2501-196-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be
performed are shown as follows.
GND
I+3V
IOP
TE
VC
RF
FE
: Ground
: For measuring IOP (Check the deterioration of the optical pick-up laser)
: For measuring IOP (Check the deterioration of the optical pick-up laser)
: TRK error signal (Traverse adjustment)
: Reference level for checking the signal
: RF signal (Check jitter)
: Focus error signal
CN105
IOP
TE
I+3V
GND
FE
VC
RF
1
I+3V
IOP
GND
TE
FE
VC
RF
I+3V
Iop
GND
TE
FE
VC
RF
7
6
for
MDM-7A
Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF
BD 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 label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD board),
record the Iop value on the optical pick-up according to the following procedure.
Record Precedure:
1. While pressing the l AMS L knob and x button, connect the power plug to the outlet, and release the l AMS L knob and
x button.
2. Rotate the l AMS L knob to display “[Service]”, and press the YES button.
3. Rotate the l AMS L knob to display “Iop Write” (C05), and press the YES button.
4. The display becomes “[email protected]@@[email protected]” (@ is an arbitrary number) and the numbers which can be changed will blink.
5. Input the Iop value written on the optical pick-up.
To select the number : Rotate the l AMS L knob.
To select the digit
: Press the l AMS L knob.
6. When the YES button is pressed, the display becomes “[email protected]@@[email protected]” (@ is an arbitrary number).
7. As the adjustment results are recorded for the 6 value. Leave it as it is and press the YES button.
8. “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop
Write”.
9. Press the REPEAT button to complete.
Display Precedure:
1. While pressing the l AMS L knob and x button, connect the power plug to the outlet, and release the l AMS L knob and
x button.
2. Rotate the l AMS L knob to display “[Service]”, and press the YES button.
3. Rotate the l AMS L knob to display “Iop Read” (C26).
4. “@@[email protected]/##.#” is displayed and the recorded contents are displayed.
@@[email protected] : indicates the Iop value labeled on the pick-up.
##.#
: indicates the Iop value after adjustment
5. To end, press the l AMS L button or MENU/NO button to display “Iop Read”. Then press the REPEAT button.
7
CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS
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”.
• 5-6-2. Laser power check (see page 23)
• 5-6-3. Iop Compare (see page 23)
• 5-6-4. Auto Check (see page 24)
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.
FORCED RESET
The system microprocessor can be reset in the following procedure.
Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.
Procedure :
Remove the short-pin attached to CN420, and then attach it again.
[MAIN BOARD] (Component Side)
CN420
8
RETRY CAUSE DISPLAY MODE
• 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. Procedure 1: Press the x button continuously for about 10 seconds.
Procedure 2: Press the LEVEL/DISPLAY/CHAR button while pressing the x button and MENU/NO button.
2. When the mode is set, “RTs 00c 00e 000” is displayed.
3. Press the z REC button to start recording. Then press the X button and start recording.
4. To check the “track mode”, press the H button to start play.
5. To exit the test mode, press the @/1 button, and turn OFF the power. When “TOC” disappears, disconnect the power plug from the outlet.
If the test mode cannot be exited, refer to “Forced Reset” on page 8.
Fig. 1 Reading the Test Mode Display
(During recording and stop)
Fig. 2 Reading the Test Mode Display
(During playback)
[email protected]@c##c***
Fluorescent display tube display
@@####**$$
Fluorescent display tube display
@@ : Cause of retry
## : Number of retries
*** : Number of retry errors
@@
##
**
$$
:
:
:
:
Parts No. (name of area named on TOC)
Cluster
} Address (Physical address on disc)
Sector
Track mode (Track information such as copyright information of each part)
Reading the Retry Cause Display
Higher Bits
Hexadecimal 8
Bit
Binary
4
2
1
Lower Bits
8
4
2
1
b7 b6 b5 b4 b3 b2 b1 b0
Hexadecimal
Cause of Retry
Occurring conditions
0
0
0
0
0
0
0
1
01
shock
0
0
0
0
0
0
1
0
02
ader5
Discontinuous address When ADIP address is not continuous
When track jump (shock) is detected
When ADER was counted more than five times continuously
0
0
0
0
0
1
0
0
04
0
0
0
0
1
0
0
0
08
DIN unlock
When DIN unlock is detected
When not in focus
0
0
0
1
0
0
0
0
10
FCS incorrect
0
0
1
0
0
0
0
0
20
IVR rec error
When ABCD signal level exceeds the specified range
0
1
0
0
0
0
0
0
40
CLV unlock
When CLV is unlocked
1
0
0
0
0
0
0
0
80
Access fault
When access operation is not performed normally
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 t b6
Lower bit : 2 = 0010 t b1
In this case, the retry cause is combined of “CLV unlock” and “ader5”.
When A2 is displayed:
Higher bit : A = 1010 t b7+b5
Lower bit : 2 = 0010 t b2
The retry cause in this case is combined of “access fault”, “IVR rec error”, and “ader5”.
9
Reading the Track Mode Display
Higher Bits
Hexadecimal 8
Bit
Binary
4
2
1
Lower Bits
8
4
2
1
b7 b6 b5 b4 b3 b2 b1 b0
Details
Hexadecimal
When 0
When 1
0
0
0
0
0
0
0
1
01
Emphasis OFF
Emphasis ON
0
0
0
0
0
0
1
0
02
Monaural
Stereo
0
0
0
0
0
1
0
0
04
This is 2-bit display. Normally 01.
0
0
0
0
1
0
0
0
08
01:Normal audio. Others:Invalid
0
0
0
1
0
0
0
0
10
Audio (Normal)
Invalid
0
0
1
0
0
0
0
0
20
Original
Digital copy
0
1
0
0
0
0
0
0
40
Copyright
No copyright
1
0
0
0
0
0
0
0
80
Write prohibited
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 t b7
Lower bit : 4 = 0100 t b2
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 exists”, and “write allowed”.
Example When 07 is displayed:
Higher bit : 0 = 1000 t All 0
Lower bit : 7 = 0111 t b0+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 exists”, and “write prohibited”.
Hexadecimal t Binary Conversion Table
Hexadecimal
10
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
SECTION 2
GENERAL
12
3
4
5
6
7
8
9 0 qa
qs
qd
wj wh
wg
wf
wd ws wa
w; ql qkqj qhqgqf
1
STANDBY indicator
qg
J button
2
@/1 (power) button
qh
REPEAT button
3
Remote sensor
qj
PLAY MODE button
4
MDLP indicator
qk
j button
5
A EJECT button
ql
l AMS L /PUSH ENTER button
6
MENU/NO button
w;
CLEAR button
7
YES button
wa
TIME button
8
H button
ws
SF EDIT button and indicator
9
S button
wd
PITCH CONTROL button and indicator
q;
s button
wf
KEYBOARD jack
qa
z REC button
wg
LEVEL knob
qs
REC MODE button
wh
PHONES jack
qd
INPUT button
wj
TIMER knob
qf
LEVEL/DISPLAY/CHAR button
11
SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. UPPER CASE (408226)
2 upper case (408226)
1 two screws
(CASE 3 TP2)
1 two screws
(CASE 3 TP2)
3-2. FRONT PANEL SECTION
3 connector
(CN820)
1 wire (flat type) (17core)
(CN490)
5 claw
2 connector
(CN390)
5 claw
6 front panel section
4 six screws
(BVTP3 × 8)
12
3-3. MAIN BOARD
3 connector
(CN902) 2 wire (flat type) (23core)
(CN400)
6 screw
1 wire (flat type) (27core)
(BVTP3 × 8)
(CN1)
5 screw
(BVTP3 × 8)
7 MAIN board
4 four screws
(BVTP3 × 8)
3-4. PT BOARD, VOL-SEL BOARD
3 two screws
(PTTWH (M3))
4 PT board
2 connector
(CN951)
1 connector
(CN900)
5 two screws (BVTP3 × 8)
(MY, SP model)
6 VOL-SEL board
(MY, SP model)
13
3-5. MECHANISM DECK SECTION (MDM-7A)
2 four step screws
(BVTTWH M3)
4 mechanism deck
1 harness
3
3-6. BD BOARD
2 Remove the solder
(Two portion)
2 Remove the solder
(Two portion)
5 connector
(CN101)
M102
2 Remove the solder
(Two portion)
M101
M103
S102
3 two screws
(BTP 2 × 6)
14
1 connector
(CN104)
4 BD board
2 Remove the solder
(Three portion)
SECTION 4
TEST MODE
4-1. PRECAUTIONS FOR USE OF TEST MODE
• As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc
is stopped before setting and removing it.
Even if the A EJECT button is pressed while the disc is rotating during continuous playback, continuous recording, etc., the disc will
not stop rotating.
Therefore, it will be ejected while rotating.
Be sure to press the A EJECT button after pressing the MENU/NO button and the rotation of disc is stopped.
4-1-1. Recording laser emission mode and operating buttons
•
•
•
•
•
•
•
•
Continuous recording mode (CREC 1MODE)
Laser power check mode (LDPWR CHECK)
Laser power adjustment mode (LDPWR ADJUS)
Iop check (Iop Compare)
Iop value nonvolatile writing (Iop NV Save)
Traverse (MO) check (EF MO CHECK)
Traverse (MO) adjustment (EF MO ADJUS)
When pressing the z REC button.
4-2. SETTING THE TEST MODE
The following are two methods of entering the test mode.
Procedure 1: While pressing the AMS knob and x button, connect the power plug to an outlet, and release the AMS knob and x button.
When the test mode is set, “[Check]” will be displayed. Rotating the AMS knob switches between the following three groups;
··· y Check y Service y Develop y ···.
Procedure 2: While pressing the AMS knob, connect the power plug to the outlet and release the AMS knob.
When the test mode is set, “TEMP CHECK” will be displayed. By setting the test mode using this method, only the “Check”
group of method 1 can be executed.
NOTE: Do not use the test mode in the [Develop] group.
If used, the unit may not operate normally.
If the [Develop] group is set accidentally, press the MENU/NO button immediately to exit the [Develop] group.
4-3. EXITING THE TEST MODE
Press the REPEAT button. The disc is ejected when loaded, and “Standby” display blinks, and the STANDBY state is set.
4-4. BASIC OPERATIONS OF THE TEST MODE
All operations are performed using the AMS knob, YES button, and MENU/NO button.
The functions of these buttons are as follows.
Function name
Function
MENU/NO button
Cancel or move to top hierarchy
YES button
Set
AMS
knob
Left or Right
Select
Push
Set submenu
15
4-5. SELECTING THE TEST MODE
There are 25 types of test modes as shown below. The groups can be switched by rotating the AMS knob. After selecting the group to be
used, press the YES button. After setting a certain group, rotating the AMS knob switches between these modes.
Refer to “Group” in the table for details selected.
All adjustments and checks during servicing can be performed in the test mode in the Service group.
NOTE: Do not use the test mode in the [Develop] group.
If used, the unit may not operate normally.
If the [Develop] group is set accidentally, press the MENU/NO button immediately to exit the [Develop] group.
Group
Display
Details
No.
AUTO CHECK
C01
Automatic self-diagnosis
Err Display
C02
Error history display, clear
TEMP ADJUS
C03
Temperature compensation offset adjustment
LDPWR ADJUS
C04
Laser power adjustment
Iop Write
C05
Iop data writing
Iop NV Save
C06
Writes current Iop value in read nonvolatile memory using microprocessor
EF MO ADJUS
C07
Traverse (MO) adjustment
EF CD ADJUS
C08
Traverse (CD) adjustment
FBIAS ADJUS
C09
Focus bias adjustment
AG Set (MO)
C10
Focus, tracking gain adjustment (MO)
AG Set (CD)
C11
Focus, tracking gain adjustment (CD)
TEMP CHECK
C12
Temperature compensation offset check
LDPWR CHECK
C13
Laser power check
EF MO CHECK
C14
Traverse (MO) check
EF CD CHECK
C15
Traverse (CD) check
FBIAS CHECK
C16
Focus bias check
ScurveCHECK
C17
S-curve check
VERIFYMODE
C18
Nonvolatile memory check
DETRK CHECK
C19
Detrack check
0920 CHECK
C25
Most circumference check
Iop Read
C26
Iop data display
Iop Compare
C27
Comparison with initial Iop value written in nonvolatile memory
ADJ CLEAR
C28
Initialization of nonvolatile memory for adjustment values
INFORMATION
C31
Display of microprocessor version, etc.
CPLAY1MODE
C34
Continuous playback mode
CREC 1MODE
C35
Continuous recording mode
Mark
Check
Service
• For details of each adjustment mode, refer to “5. Electrical Adjustments”.
For details of “Err Display”, refer to “Self-Diagnosis Function” on page 2.
• If a different mode has been selected by mistake, press the MENU/NO button to exit that mode.
• Modes with (X) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set accidentally, press the MENU/NO button to exit the mode immediately.
16
4-5-1. Operating the Continuous Playback Mode
1. Entering the continuous playback mode
1 Set the disc in the unit. (Whichever recordable discs or discs for playback only are available.)
2 Rotate the AMS knob and display “CPLAY1 MODE”(C34).
3 Press the YES button to change the display to “CPLAY1 MID”.
4 When access completes, the display changes to “C =
AD = ”.
Note : The numbers “ ” displayed show you error rates and ADER.
2. Changing the parts to be played back
1 Press the YES button during continuous playback to change the display as below.
“CPLAY1 MID” t “CPLAY1 OUT” t “CPLAY1 IN”
When pressed another time, the parts to be played back can be moved.
2 When access completes, the display changes to “C =
AD = ”.
Note : The numbers “ ” displayed show you error rates and ADER.
3. Ending the continuous playback mode
1 Press the MENU/NO button. The display will change to “CPLAY1 MODE”(C34).
2 Press the AEJECT button to remove the disc.
Note : The playback start addresses for IN, MID, and OUT are as follows.
IN
40h cluster
MID 300h cluster
OUT 700h cluster
4-5-2. Operating the Continuous Recording Mode (Use only when performing self-recording/palyback check.)
1. Entering the continuous recording mode
1 Set a recordable disc in the unit.
2 Rotate the AMS knob and display “CREC1 MODE” (C35).
3 Press the YES button to change the display to “CREC1 MID”.
4 When access completes, the display changes to “CREC1 (
)” and REC lights up.
Note : The numbers “ ” displayed shows you the recording position addresses.
2. Changing the parts to be recorded
1 When the YES button is pressed during continuous recording, the display changes as below.
“CREC1 MID” t “CREC1 OUT” t “CREC1 IN”
When pressed another time, the parts to be recorded can be changed. REC goes off.
)” and REC lights up.
2 When access completes, the display changes to “CREC1 (
Note : The numbers “ ” displayed shows you the recording position addresses.
3. Ending the continuous recording mode
1 Press the MENU/NO button. The display changes to “CREC1 MODE” (C35 ) and REC goes off.
2 Press the A 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 MENU/NO 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.
17
4-6. FUNCTIONS OF OTHER BUTTONS
Contents
Function
G
Sets continuous playback when pressed in the STOP state. When pressed during continuous
playback, the tracking servo turns ON/OFF.
x
Stops continuous playback and continuous recording.
M
The sled moves to the outer circumference only when this is pressed.
m
The sled moves to the inner circumference only when this is pressed.
REC MODE
Switches between the pit and groove modes when pressed.
PLAY MODE
Switches the spindle servo mode (CLV S y CLV A).
LEVEL/DISPLAY/CHAR
Switches the displayed contents each time the button is pressed.
A
Ejects the disc.
REPEAT
Exits the test mode.
4-7. TEST MODE DISPLAYS
Each time the LEVEL/DISPLAY/CHAR button is pressed, the display changes in the following order.
When CPLAY and CREC are started, the display will forcibly be switched to the error rate display as the initial mode.
1. Mode display
Displays “TEMP ADJUST”, “CPLAY1MODE”, etc.
2. Error rate display
Displays the error rate in the following way.
C1 =
AD =
C1 = Indicates the C1 error.
AD = Indicates ADER.
3. Address display
The address is displayed as follows. (MO:recordable disc, CD:playback only disc)
If the LEVEL/DISPLAY/CHAR button is pressed after pressing the
PROGRAM button, the display switches from groove to pit or vice versa.
h=
s=
(MO pit and CD)
a=
(MO groove)
h=
h = Indicates the header address.
s = Indicates the SUBQ address.
a = Indicates the ADIP address.
Note: “–” is displayed when the address cannnot be read.
18
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)
C1 error and Jitter display
(Not used in servicing)
AD error and Jitter display
(Not used in servicing)
4-8. MEANINGS OF OTHER DISPLAYS
Contents
Display
When Lit
When Off
G
Servo ON
Servo OFF
X
Tracking servo OFF
Tracking servo ON
REC
Recording mode ON
Recording mode OFF
SYNC
CLV low speed mode
CLV normal mode
L.SYNC
ABCD adjustment completed
OVER
Tracking offset cancel ON
B/1
Tracking auto gain OK
A-/REP
Focus auto gain OK
TRACK/(LP) 4/Calendar frame
Pit
Groove
DISC/LP2
High reflection
Low reflection
SLEEP/SHUF
CLV S
CLV A
MONO
CLV LOCK
CLV UNLOCK
Tracking offset cancel OFF
4-9. AUTOMATIC SELF-DIAGNOSIS FUNCTION
This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up.
To perform this test mode, the laser power must first be checked.
Perform AUTO CHECK after the laser power check and Iop check.
Procedure
1. Press the YES button. If “LDPWR
” is displayed, it means that the laser power check has not been performed. In this case,
perform the laser power check and Iop compare, and then repeat from step 1.
2. If a disc is in the mechanical deck, it will be ejected forcibly.
“DISC IN” will be displayed in this case. Load a test disc (MDW-74/GA-1) which can be recorded.
3. If a disk is loaded at step 2, the check will start automatically.
4. When “XX CHECK” is displayed, the item corresponding to XX will be performed.
When “06 CHECK” completes, the disc loaded at step 2 will be ejected. “DISC IN” will be displayed. Load the check disc (MD) TDYS-1.
5. When the disc is loaded in step 4, the check will automatically be resumed from “07 CHECK”.
6. After completing to test item 12, check OK or NG will be displayed. If all items are OK, “CHECK ALL OK” will be displayed. If any item
is NG, it will be displayed as “NG:xxxx”.
When “CHECK ALL OK” is displayed, it means that the optical pick-up is normal. Check the operations of the other spindle motor, thread
motor, etc.
When displayed as “NG:xxxx”, it means that the optical pick-up is faulty. In this case, replace the optical pick-up.
4-10. INFORMATION
Display the software version.
Procedure
1. If displayed as “INFORMATION”, press the YES button.
2. The software version will be displayed.
3. Press the MENW/NO button to end this mode.
4-11. WHEN MEMORY NG IS DISPLAYED
If the nonvolatile memory data is abnormal, “E001”/”MEMORY NG” will be displayed so that the MD deck does not continue operations.
In this case, set the test mode promptly and perform the following procedure.
Procedure
1. Set the test mode. (Refer to 4-2.)
2. Normally a message for selecting the test mode will be displayed. However if the nonvolatile memory is abnormal, the following will be
displayed. “INIT EEP?”
3. Press the STOP button and EJECT button together.
4. Rotate the AMS knob and select MDM-7A.
5. Press the AMS knob. If the nonvolatile memory is successfully overwritten, the normal test mode will be set and a message to select the
test mode will be displayed.
19
SECTION 5
ELECTRICAL ADJUSTMENTS
5-1. PARTS REPLACEMENT AND ADJUSTMENT
If malfunctions caused by Optical pick-up such as sound skipping are suspected, follow the following check.
Check before replacement
Start
5-6-2.
Laser Power Check
(See page 23)
NG
OK
5-6-3.
Iop Compare
(See page 23)
NG
OK
5-6-4.
Auto Check
(See page 24)
OK
Other faults are suspected.
Check the threading mechanism, etc.
20
NG
Replace Optical pick-up or MDM-7A
Adjustment flow
• Abbreviation
OP: Optical pick-up
Start
Replace IC195
YES
After turning off and then on the power,
initialize the EEPROM
For details, refer to 4-11. WHEN MEMORY NG IS
DISPLAYED (See page 19)
NO
Replace OP or IO195
YES
5-7. INITIAL SETTING OF ADJUSTMENT VALUE
(See page 26)
YES
5-9. TEMPERATURE COMPENSATION OFFSET
ADJUSTMENT (See page 26)
NO
Replace IC101, IC195, or D101
NO
Replace OP, IC190, or IC195
YES
5-10. LASER POWER ADJUSTMENT (See page 26)
NO
Replace OP, IC102, IC190,
or IC195
YES
5-11. Iop NV SAVE (See page 27)
NO
Replace OP, IC101, IC151,
or IC195
YES
5-12. TRAVERSE ADJUSTMENT (See page 27)
5-13. FOCUS BIAS ADJUSTMENT (See page 28)
5-16. AUTO GAIN CONTROL OUTPUT LEVEL
ADJUSTMENT (See page 29)
NO
Replace OP
YES
OP change in Err Display mode
Iop write
NO
Replace the spindle motor
YES
Spdl change in Err Display mode
NO
5-6-4. Auto Check
(See page 24)
End adjustments
21
5-2. PRECAUTIONS FOR CHECKING LASER DIODE
EMISSION
To check the emission of the laser diode during adjustments, never
view directly from the top as this may lose your eye-sight.
5-3. PRECAUTIONS FOR USE OF OPTICAL PICKUP (KMS-260B)
As the laser diode in the optical pick-up is easily damaged by static
electricity, solder the laser tap of the flexible board when using it.
Before disconnecting the connector, desolder first. Before connecting the connector, be careful not to remove the solder. Also take
adequate measures to prevent damage by static electricity. Handle
the flexible board with care as it breaks easily.
pick-up
flexible board
laser tap
Optical pick-up flexible board
5-4. PRECAUTIONS FOR ADJUSTMENTS
1) When replacing the following parts, perform the adjustments
and checks with in the order shown in the following table.
2) Set the test mode when performing adjustments.
After completing the adjustments, exit the test mode.
Perform the adjustments and checks in “group S” of the test mode.
3) Perform the adjustments to be needed in the order shown.
4) Use the following tools and measuring devices.
• Check Disc (MD) TDYS-1
(Parts No. 4-963-646-01)
• Test Disk (MDW-74/GA-1) (Parts No. 4-229-747-01)
• 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 performing CAL of prove.)
• Digital voltmeter
• Thermometer
• Jig for checking BD board waveform
(Parts No. : J-2501-196-A)
5) When observing several signals on the oscilloscope, etc.,
make sure that VC and ground do not connect inside the oscilloscope.
(VC and ground will become short-circuited.)
6) Using the above jig enables the waveform to be checked without
the need to solder.
(Refer to Servicing Note on page 6.)
7) As the disc used will affect the adjustment results, make sure
that no dusts nor fingerprints are attached to it.
Parts to be replaced
Adjustment
5-7. Initial setting of adjustment values
5-8. Recording of Iop information
5-9. TEMP ADJUST
5-10. Laser power adjustment
5-11. Iop NV Save
5-12. Traverse adjustment
5-13. Focus bias adjustment
5-16. Auto gain adjustment
5-6-4. AUTO CHECK
22
Optical
Pick-up
IC101
IC102
IC151
IC190
IC195
D101
5-5. USING THE CONTINUOUSLY RECORDED DISC
* This disc is used in focus bias adjustment and error rate check.
The following describes how to create a continuous recording
disc.
1. Insert a disc (blank disc) commercially available.
2. Rotate the AMS knob and display “CREC1 MODE”.
3. Press the YES button again to display “CREC1 MID”.
Display “CREC (0300)” and start to recording.
4. Complete recording within 5 minutes.
5. Press the MENU/NO button and stop recording .
6. Press the AEJECT button and remove the disc.
The above has been how to create a continuous recorded data for
the focus bias adjustment and error rate check.
Note :
• Be careful not to apply vibration during continuous recording.
5-6. CHECKS PRIOR TO REPAIRS
These checks are performed before replacing parts according to
“approximate specifications” to determine the faulty locations. For
details, refer to “Checks Prior to Parts Replacement and Adjustments” (See page 8).
5-6-1. Temperature Compensation Offset Check
When performing adjustments, set the internal temperature and room
temperature to 22 to 28ºC.
Checks cannot be performed properly if performed after some time
from power ON due to the rise in the temperature of the IC and
diode, etc. So, perform the checks again after waiting some time.
Checking Procedure:
1. Rotate the AMS knob to display “TEMP CHECK”.
2. Press the YES button.
3. “[email protected]@(##) [OK]” should be displayed. If “[email protected]@ (##) [NG]”
is displayed, it means that the results are bad.
(@@ indicates the current value set, and ## indicates the value
written in the non-volatile memory.)
5-6-2. Laser Power Check
Before checking, check the Iop value of the optical pick-up.
(Refer to 5-8. Recording and Displaying Iop Information.)
Checking Procedure:
1. Set the laser power meter on the objective lens of the optical
pick-up. (When it cannot be set properly, press the m button
or M button to move the optical pick-up.)
Connect the digital volt meter to CN105 pin 1 (I+3V) and
CN105 pin 2 (IOP).
2. Then, rotate the AMS knob and display “LDPWR CHECK”.
3. Press the YES button once and display “LD 0.9 mW $ ”.
Check that the reading of the laser power meter become 0.84 to
0.92 mW.
4. Press the YES button once more and display “ LD 7.0 mW $
”. Check that the reading the laser power meter and digital
volt meter satisfy the specified value.
Specified Value :
Laser power meter reading : 7.0 ± 0.2 mW
Digital voltmeter reading : Optical pick-up displayed value ± 10%
(Optical pick-up label)
KMS
260B
20101
H0576
R
(For details of the method for checking
this value, refer to “5-8. Recording and
Displaying Iop Information”.)
Iop = 57.6 mA in this case
Iop (mA) = Digital voltmeter reading (mV)/1 (Ω)
5. 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.)
Note 1: After step 4, each time the YES button is pressed, the
display will be switched between “LD 0.7 mW $ ”,
“LD 6.2 mW $ ”, and “LD Wp
$ ”. Nothing
needs to be performed here.
5-6-3. Iop Compare
The current Iop value at laser power 7 mw output and reference Iop
value (set at shipment) written in the nonvolatile memory are
compared, and the rate of increase/decrease will be displayed in
percentage.
Note: Perform this function with the optical pick-up set at room
temperature.
Connection :
Laser power
meter
Optical pick-up
objective lens
Digital volt meter
Procedure
1. Rotate the AMS knob to display “Iop Compare”.
2. Press the YES button and start measurements.
3. When measurements complete, the display changes to
“±xx%yy”.
xx is the percentage of increase/decrease, and OK or NG is
displayed at yy to indicate whether the percentage of increase/
decrease is within the allowable range.
4. Press the MENU/NO button to end.
BD board
CN105 pin 1 (I+3V)
CN105 pin 2 (IOP)
23
5-6-4. Auto Check
This test mode performs C-REC and C-PLAY automatically for
mainly checking the characteristics of the optical pick-up. To
perform this test mode, the laser power must first be checked.
Perform Auto Check after the laser power check and Iop compare.
Procedure
1. Press the YES button. If “LDPWR minicheck” is displayed, it
means that the laser power check has not been performed. In
this case, perform the laser power check and Iop compare, and
then repeat from step 1.
2. If a disc is in the mechanical deck, it will be ejected forcibly.
“DISC IN” will be displayed in this case. Load a test disc (MDW74/GA-1) which can be recorded.
3. If a disk is loaded at step 2, the check will start automatically.
4. When “XX CHECK” is displayed, the item corresponding to
XX will be performed.
When “06 CHECK” completes, the disc loaded at step 2 will be
ejected. “DISC IN” will be displayed. Load the check disc (MD)
TDYS-1.
5. When the disc is loaded, the check will automatically be resumed
from “07 CHECK”.
6. After completing to test item 12, check OK or NG will be
displayed. If all items are OK, “CHECK ALL OK” will be
displayed. If any item is NG, it will be displayed as “NG:xxxx”.
6. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not rotate the AMS knob.
(Read power traverse checking)
(Traverse Waveform)
A
VC
B
Specified value : Below 10% offset value
Offset value (%) = IA – BI X 100
2 (A + B)
7. Press the YES button and display “EFB =
MO-W”.
8. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not rotate the AMS knob.
(Write power traverse checking)
(Traverse Waveform)
A
VC
When “CHECK ALL OK” is displayed, it means that the optical
pick-up is normal. Check the operations of the other spindle motor,
thread motor, etc.
When displayed as “NG:xxxx”, it means that the optical pick-up is
faulty. In this case, replace the optical pick-up.
5-6-5. Other Checks
All the following checks are performed by the Auto Check mode.
They therefore need not be performed in normal operation.
5-6-6. Traverse Check
5-6-7. Focus Bias Check
5-6-8. C PLAY Check
5-6-9. Self-Recording/Playback Check
5-6-6. Traverse Check
Connection :
B
Specified value : Below 10% offset value
Offset value (%) = IA – BI X 100
2 (A + B)
9. Press the YES button display “EFB =
MO-P”.
Then, the optical pick-up moves to the pit area automatically
and servo is imposed.
10. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not rotate the AMS knob.
(Traverse Waveform)
Oscilloscope
A
VC
BD board
CN105 pin 4 (TE)
CN105 pin 6 (VC)
B
V : 0.5 V/div
H : 10 ms/div
Input : DC mode
Checking Procedure:
1. Connect an oscilloscope to CN105 pin 4 (TE) and CN105 pin
6 (VC) of the BD board.
2. Load a test disc (MDW-74/GA-1). (Refer to Note 1.)
3. Press the M button and move the optical pick-up outside the
pit.
4. Rotate the AMS knob and display “EF MO CHECK”.
MO-R”.
5. Press the YES button and display “EFB =
(Laser power READ power/Focus servo ON/tracking servo OFF/
spindle (S) servo ON)
24
Specified value : Below 10% offset value
Offset value (%) = IA – BI X 100
2 (A + B)
11. Press the YES button display “EF MO CHECK”
The disc stops rotating automatically.
12. Press the A button and remove the disc.
13. Load the check disc (MD) TDYS-1.
14. Roteto the AMS knob and display “EF CD CHECK” (C04).
CD”. Servo is
15. Press the YES button and display “EFB =
imposed automatically.
16. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not rotate the AMS knob.
(Traverse Waveform)
A
VC
B
Specified value : Below 10% offset value
Offset value (%) = IA – BI X 100
2 (A + B)
17. Press the YES button and display “EF CD CHECK”.
18. Press the A button and remove the check disc (MD) TDYS-1.
Note 1 : MO reading data will be erased during if a recorded disc is
used in this adjustment.
Note 2 : If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be
seen more clearly.
Oscilloscope
BD board
CN105 pin 4 (TE)
CN105 pin 6 (VC)
5-6-8. C PLAY Check
MO Error Rate Check
Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA-1).
(Refer to “5-5. Using the Continuously Recorded Disc”.)
2. Rotate the AMS knob and display “CPLAY1 MODE”.
3. Press the YES button and display “CPLAY1 MID”.
4. The display changes to “C1 =
AD = ”.
5. If the C1 error rate is below 20, check that ADER is 00.
6. Press the MENU/NO button, stop playback, press the A button, and test disc.
CD Error Rate Check
Checking Procedure :
1. Load a check disc (MD) TDYS-1.
2. Rotate the AMS knob and display “CPLAY1 MODE”.
3. Press the YES button twice and display “CPLAY1 MID”.
4. The display changes to “C1 =
AD = ”.
5. Check that the C1 error rate is below 20.
6. Press the MENU/NO button, stop playback, press the A button, and the test disc.
5-6-9. Self-Recording/playback Check
Prepare a continuous recording disc using the unit to be repaired
and check the error rate.
330 kΩ
10pF
5-6-7. Focus Bias Check
Change the focus bias and check the focus tolerance amount.
Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA-1).
(Refer to “5-5. Using the Continuously Recorded Disc”.)
2. Rotate the AMS knob and display “CPLAY1 MODE”.
3. Press the YES button and display “CPLAY1 MID”.
4. Press the MENU/NO button when “C =
AD = ” is
displayed.
5. Rotate the AMS knob and display “FBIAS CHECK”.
6. Press the YES button and display “
/ c = ”.
The first four digits indicate the C1 error rate, the two digits
after [/] indicate ADER, and the 2 digits after [c =] indicate the
focus bias value.
Check that the C1 error is below 20 and ADER is below 2.
7. Press the YES button and display “
/ b = ”.
Check that the C1 error is below 100 and ADER is below 2.
8. Press the YES button and display “
/ a = ”.
Check that the C1 error is below 100 and ADER is below 2.
9. Press the MENU/NO button, next press the A button, and
remove the test disc.
Checking Procedure :
1. Insert a recordable test disc (MDW-74/GA-1) into the unit.
2. Rotate the AMS knob to display “CREC1 MODE”.
3. Press the YES button to display the “CREC1 MID”.
4. When recording starts, “ REC ” is displayed, this becomes
“CREC (@@@@)” (@@@@ is the address), and recording
starts.
5. About 1 minute later, press the MENU/NO button to stop
continuous recording.
6. Rotate the AMS knob to display “C PLAY1 MODE”.
7. Press the YES button to display “C PLAY1 MID”.
AD = ” will be displayed.
8. “C1 =
9. Check that the C1 error becomes below 20 and the AD error
below 2.
10. Press the MENU/NO button to stop playback, and press the
A button and remove the disc.
25
5-7. INITIAL SETTING OF ADJUSTMENT VALUE
5-9. TEMPERATURE COMPENSATION OFFSET
ADJUTMENT
Note:
Mode which sets the adjustment results recorded in the non-volatile memory to the initial setting value. However the results of the
temperature compensation offset adjustment will not change to the
initial setting value.
If initial setting is performed, perform all adjustments again excluding the temperature compensation offset adjustment.
For details of the initial setting, refer to “5-4. Precautions on Adjustments” and execute the initial setting before the adjustment as
required.
Save the temperature data at that time in the non-volatile memory
as 25 ˚C reference data.
Note :
1. Usually, do not perform this adjustment.
2. Perform this adjustment in an ambient temperature of 22 ˚C to
28 ˚C. Perform it immediately after the power is turned on when
the internal temperature of the unit is the same as the ambient
temperature of 22 ˚C to 28 ˚C.
3. When D101 has been replaced, perform this adjustment after
the temperature of this part has become the ambient temperature.
Adjusting Procedure :
1. Rotate the AMS knob and display “TEMP ADJUST”.
2. Press the YES button and select the “TEMP ADJUST” mode.
3. “TEMP =
[OK]” and the current temperature data will be
displayed.
4. To save the data, press the YES button.
When not saving the data, press the MENU/NO button.
5. When the YES button is pressed, “TEMP = SAVE” will be
displayed and turned back to “TEMP ADJUST” display then.
When the MENU/NO button is pressed, “TEMP ADJUST”
will be displayed immediatelly.
Setting Procedure :
1. Rotate the AMS knob to display “ADJ CLEAR”.
2. Press the YES button. “Complete!” will be displayed momentarily and initial setting will be executed, after which “ADJ
CLEAR” will be displayed.
5-8. RECORDING AND DISPLAYING THE Iop
INFORMATION
The IOP data can be recorded in the non-volatile memory. The Iop
value on the label of the optical pick-up and the Iop value after the
adjustment will be recorded. Recording these data eliminates the
need to read the label on the optical pick-up.
Recording Procedure :
1. While pressing the AMS knob and x button, connect the
power plug to the outlet, and release the AMS knob and x
button.
2. Rotate the AMS knob to display “[Service]”, and press the
YES button.
3. Rotate the AMS knob to display “Iop.Write”, and press the
YES button.
4. The display becomes [email protected]@@[email protected] (@ is an arbitrary number)
and the numbers which can be changed will blink.
5. Input the Iop value written on the optical pick-up.
To select the number : Rotate the AMS knob.
To select the digit : Press the AMS knob
6. When the YES button is pressed, the display becomes
“[email protected]@@[email protected]” (@ is an arbitrary number).
7. As the adjustment results are recorded for the 6 value. Leave it
as it is and press the YES button.
8. “Complete!” will be displayed momentarily. The value will be
recorded in the non-volatile memory and the display will become “Iop Write”.
Display Procedure :
1. Rotate the AMS knob to display “Iop.Read”.
2. “@@[email protected]/##.#” is displayed and the recorded contents are displayed.
@@[email protected] indicates the Iop value labeled on the pick-up.
##.# indicates the Iop value after adjustment
3. To end, press the AMS button or MENU/NO button to display
“Iop Read”.
26
Specified Value :
The “TEMP =
” should be within “E0 - EF”, “F0 - FF”, “00 0F”, “10 - 1F” and “20 - 2F”.
5-10. LASER POWER ADJUSTMENT
Check the Iop value of the optical pick-up before adjustments.
(Refer to 5-8. Recording and Displaying Iop Information.)
Connection :
Laser power
meter
Optical pick-up
objective lens
Digital volt meter
BD board
CN105 pin 1 (I+3V)
CN105 pin 2 (IOP)
Adjusting Procedure :
1. Set the laser power meter on the objective lens of the optical
pick-up. (When it cannot be set properly, press the m button
or M button to move the optical pick-up.)
Connect the digital volt meter to CN105 pin 1 (I+3V) and
CN105 pin 2 (IOP).
2. Rotate the AMS knob and display “LDPWR ADJUST”.
(Laser power : For adjustment)
3. Press the YES button once and display “LD 0.9 mW $ ”.
4. Rotate the AMS knob so that the reading of the laser power
meter becomes 0.85 to 0.91 mW. Press the YES button after
setting the range knob of the laser power meter, and save the
adjustment results. (“LD SAVE $ ” will be displayed for a
moment.)
5. Then “LD 7.0 mW $ ” will be displayed.
6. Rotate the AMS knob so that the reading of the laser power
meter becomes 6.9 to 7.1 mW, press the YES button and save
it.
Note : Do not perform the emission with 7.0 mW more than 15
seconds continuously.
7. Then, rotate the AMS knob and display “LDPWR CHECK”.
8. Press the YES button once and display “LD 0.9 mW $ ”.
Check that the reading of the laser power meter become 0.85 to
0.91 mW.
9. Press the YES button once more and display “LD 7.0 mW $
”. Check that the reading the laser power meter and digital
volt meter satisfy the specified value.
Note down the digital voltmeter reading value.
5-12. TRAVERSE ADJUSTMENT
Connection :
Oscilloscope
BD board
CN105 pin 4 (TE)
CN105 pin 6 (VC)
V : 0.5 V/div
H : 10 ms/div
Input : DC mode
Specified Value :
Laser power meter reading : 7.0 ± 0.2 mW
Digital voltmeter reading : Optical pick-up displayed value ± 10%
(Optical pick-up label)
KMS
260B
20101
H0576
R
(For details of the method for checking
this value, refer to “5-8. Recording and
Displaying IOP Information”.)
Iop = 57.6 mA in this case
Iop (mA) = Digital voltmeter reading (mV)/1 (Ω)
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.)
11. Rotate the AMS knob to display “Iop.Write”.
12. Press the YES button. When the display becomes
[email protected]@@[email protected] (@ is an arbitrary number), press the YES button
to display “[email protected]@@[email protected]” (@ is an arbitrary number).
13. The numbers which can be changed will blink. Input the Iop
value noted down at step 9.
To select the number : Rotate the AMS knob.
To select the digit : Press the AMS knob
14. When the YES button is pressed, “Complete!” will be displayed
momentarily. The value will be recorded in the non-volatile
memory and the display will become “Iop Write”.
Note 1: After step 4, each time the YES button is pressed, the
display will be switched between “LD 0.7 mW $ ”, “LD
$ ”. Nothing needs
6.2 mW $ ”, and “LD Wp
to be performed here.
5-11. Iop NV SAVE
Write the reference values in the nonvolatile memory to perform
“Iop compare”. As this involves rewriting the reference values, do
not perform this procedure except when adjusting the laser power
during replacement of the Optical pick-up and when replacing the
IC102. Otherwise the Optical pick-up check may deteriorate.
Note: Perform this function with the optical pick-up set at room
temperature.
Adjusting Procedure :
1. Connect an oscilloscope to CN105 pin 4 (TE) and CN105 pin
6 (VC) of the BD board.
2. Load a test disc (MDW-74/GA-1). (Refer to Note 1.)
3. Press the M button and move the optical pick-up outside the
pit.
4. Rotate the AMS knob and display “EF MO ADJUST”.
MO-R”.
5. Press the YES button and display “EFB =
(Laser power READ power/Focus servo ON/tracking servo OFF/
spindle (S) servo ON)
6. Rotate the AMS knob so that the waveform of the oscilloscope
becomes the specified value.
(When the AMS knob is rotated, the of “EFB= ” changes
and the waveform changes.) In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the
specified value is satisfied as much as possible.
(Read power traverse adjustment)
(Traverse Waveform)
A
VC
B
Specification A = B
7. Press the YES button and save the result of adjustment to the
non-volatile memory (“EFB = SAVE” will be displayed for a
moment. Then “EFB = MO-W” will be displayed).
8. Rotate the AMS knob so that the waveform of the oscilloscope
becomes the specified value.
(When the AMS knob is rotated, the
of “EFBMO-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.
(Write power traverse adjustment)
(Traverse Waveform)
Procedure
1. Rotate the AMS knob to display “Iop NV Save” (C06).
2. Press the YES button and display “Iop [stop]”.
3. After the display changes to “Iop =xxsave?”, press the YES
button.
4. After “Complete!” is displayed momentarily, the display changes
to “Iop 7.0 mW”.
5. After the display changes to “Iop=yysave?”, press the YES
button.
6. When “Complete!” is displayed, it means that Iop NV saving
has been completed.
A
VC
B
Specification A = B
9. Press the YES button, and save the adjustment results in the
SAVE” will be displayed for
non-volatile memory. (“EFB =
a moment.)
10. “EFB =
MO-P”. will be displayed.
The optical pick-up moves to the pit area automatically and servo
is imposed.
27
11. Rotate the AMS knob until the waveform of the oscilloscope
moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
(Traverse Waveform)
A
VC
B
Specification A = B
12. Press the YES button, and save the adjustment results in the
non-volatile memory. (“EFB = SAVE” will be displayed for
a moment.)
Next “EF MO ADJUS” is displayed. The disc stops rotating
automatically.
13. Press the A button and remove the disc.
14. Load the check disc (MD) TDYS-1.
15. Roteto AMS knob and display “EF CD ADJUS”.
CD”. Servo is
16. Press the YES button and display “EFB =
imposed automatically.
17. Rotate the AMS knob so that the waveform of the oscilloscope
moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
(Traverse Waveform)
5-13. FOCUS BIAS ADJUSTMENT
Adjusting Procedure :
1. Load a test disk (MDW-74/GA-1).
2. Rotate the AMS knob and display “CPLAY1 MODE”.
3. Press the YES button and display “CPLAY1 MID”.
4. Press the MENU/NO button when “C1 =
AD = ” is
displayed.
5. Rotate the AMS knob and display “FBIAS ADJUST”.
6. Press the YES button and display “
/ a = ”.
The first four digits indicate the C1 error rate, the two digits
after [/] indicate ADER, and the 2 digits after [a =] indicate the
focus bias value.
7. Rotate the AMS knob in the clockwise direction and find the
focus bias value at which the C1 error rate becomes 220 (Refer
to Note 2).
8. Press the YES button and display “
/ b = ”.
9. Rotate the AMS knob in the counterclockwise direction and
find the focus bias value at which the C1 error rate becomes
220.
10. Press the YES button and display “
/ c = ”.
11. Check that the C1 error rate is below 20 and ADER is 00. Then
press the YES button.
12. If the “( ” in “ ( ” is above 20, press the YES
button.
If below 20, press the MENU/NO button and repeat the
adjustment from step 2.
13. Press the A button to remove the test disc.
Note 1 : The relation between the C1 error and focus bias is as
shown in the following figure. Find points a and b in the
following figure using the above adjustment. The focal
point position C is automatically calculated from points a
and b.
Note 2 : As the C1 error rate changes, perform the adjustment using the average vale.
A
C1 error
VC
B
220
Specification A = B
18. Press the YES button, display “EFB =
SAVE” for a moment and save the adjustment results in the non-volatile memory.
Next “EF CD ADJUST” will be displayed.
19. Press the A button and remove the check disc (MD) TDYS-1.
Note 1 : MO reading data will be erased during if a recorded disc is
used in this adjustment.
Note 2 : If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be
seen more clearly.
Oscilloscope
BD board
CN105 pin 4 (TE)
CN105 pin 6 (VC)
28
330 kΩ
10pF
b
c
a
Focus bias value
(F. BIAS)
5-14. ERROR RATE CHECK
5-14-1. CD Error Rate Check
Checking Procedure :
1. Load a check disc (MD) TDYS-1.
2. Rotate the AMS knob and display “CPLAY1 MODE”.
3. Press the YES button twice and display “CPLAY1 MID”.
AD = ”.
4. The display changes to “C1 =
5. Check that the C1 error rate is below 20.
6. Press the MENU/NO button, stop playback, press the A button, and remove the test disc.
5-14-2. MO Error Rate Check
Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA-1).
(Refer to “5-5. Using the Continuously Recorded Disc”.)
2. Rotate the AMS knob and display “CPLAY1 MODE”.
3. Press the YES button and display “CPLAY1 MID”.
4. The display changes to “C1 =
AD = ”.
5. If the C1 error rate is below 20, check that ADER is 00.
6. Press the MENU/NO button, stop playback, press the A button, and remove the test disc.
5-15. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA-1).
(Refer to “5-5. Using the Continuously Recorded Disc”.)
2. Rotate the AMS knob and display “CPLAY1 MODE”.
3. Press the YES button twice and display “CPLAY1 MID”.
4. Press the MENU/NO button when “C1 =
AD = ” is
displayed.
5. Rotate the AMS knob and display “FBIAS CHECK”.
6. Press the YES button and display “
/ c = ”.
The first four digits indicate the C1 error rate, the two digits
after [/] indicate ADR, and the 2 digits after [c =] indicate the
focus bias value.
Check that the C1 error is below 20 and ADER is below 2.
7. Press the YES button and display “
/ b = ”.
Check that the C1 error is below 100 and ADER is below 2.
/ a = ”.
8. Press the YES button and display “
Check that the C1 error is below 100 and ADER is below 2
9. Press the MENU/NO button, next press the A button, and
remove the continuously recorded disc.
5-16. AUTO GAIN CONTROL OUTPUT LEVEL
ADJUSTMENT
Be sure to perform this adjustment when the Optical pick-up is replaced.
If the adjustment results becomes “Adjust NG!”, the Optical pickup may be faulty or the ser
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