Sony MDS-S50 User Manual 2

MDS-JE470
SERVICE MANUAL
Ver 1.0 2001. 05
US and foreign patents licensed form Dolby Laboratories Licensing Corporation.

SPECIFICATIONS

US Model
AEP Model
UK Model
E Model
Australian Model
Model Name Using Similar Mechanism MDS-S50
MD Mechanism Type MDM-7A
Optical Pick-up Type KMS-260B/260E
System MiniDisc digital audio
system Disc MiniDisc Laser Semiconductor laser
( λ = 780 nm) Emission
Laser output MAX 44.6 µW
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 Material: GaAlAs Revolutions (CLV) 400 rpm to 900 rpm Error correction ACIRC (Advanced Cross
Sampling frequency 44.1 kHz Coding ATRAC (Adaptive
Modulation system EFM (Eight-to-Fourteen
Number of channels 2 stereo channels Frequency response 5 to 20,000 Hz ±0.3 dB Signal-to-noise ratio
Wow and flutter Below measurable limit
duration: continuous
Interleave Reed Solomon Code)
TRansform Acoustic Coding)/ATRAC 3
Modulation)
Over 96 dB during play
1)
Inputs
ANALOG IN Jack type: phono
Impedance: 47 kilohms Rated input: 500 mVrms Minimum input: 125 mVrms
DIGITAL OPTICAL IN Connector type: square
optical Impedance: 660 nm (optical wave length)
Outputs
ANALOG OUT Jack type: phono
Rated output: 2 Vrms (at 50 kilohms) Load impedance: over 10 kilohms
— Continued on next page —
9-873-891-11
2001E0200-1
© 2001.5
MINIDISC DECK
Sony Corporation
Home Audio Company
Shinagawa Tec Service Manual Production Group
MDS-JE470
General
Power requirements
U.S.A. and Canadian models:
120 V AC, 60Hz European model: 230 V AC, 50/60Hz Australian model: 240 V AC, 50/60Hz Hong Kong model: 220 – 240 V AC, 50/60Hz Other models: 110 – 120/220 – 240 V
AC, 50/60Hz
Adjustable with voltage
selector Power consumption
14 W (0.5 W
in standby
Supplied acce ss or ie s
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.
mode)
Dimensions (approx.) 430 X 95 X285 mm
(w/h/d) incl. projecting
parts and controls Mass (approx.)
3.0 kg
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)”.
Three- or five-
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
Cause/Remedy
The inserted MD is record-protected.
Take out the MD and close the record-
,
protect slot.
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.
,
digit code/ Message
C14/Toc Error
C41/Cannot Copy
C71/Din Unlock
E0001/ MEMORY NG
E0101/ LASER NG
Cause/Remedy
The deck could not read the TOC on the MD properly.
Insert another disc.
,
If possible, erase all the tracks on the
,
MD.
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 You cannot record a CD-R.
The sporadic appearance of this message is caused by the digital signal being recorded. This will not affect the recording.
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
MDS-JE470
1. While pressing the lAMSL knob and x button, connect the power plug to the outlet, and release the lAMSL knob and x button.
When the test mode is set, “[Check]” will be displayed.
2. Rotate the lAMSL knob and when “[Service]” is displayed, press the YES button.
3. Rotate the lAMSL 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 lAMSL knob.
6. Pressing the lAMSL knob will display or execute the contents selected.
7. Pressing the lAMSL 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
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.
History
op play tm
spdl rp tm
retry err
total err
err history
retry adrs
er refresh
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”
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”
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.
Displays the total number of errors Displays “total xx”. This is displayed in hexadecimal from 00 to FF.
Displays the past ten errors. Displays “0x ErrCd@@”. 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 lAMSL knob.
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 lAMSL knob.
Mode for erasing the error and retry address histories Procedure
1. Press the lAMSL 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.
tm change
op change
Mode for erasing the total time of recording and playback Procedure
1. Press the lAMSL knob when displayed as “tm refresh”.
2. Press the YES button when the display changes to “tm refresh?”. When “complete!” is displayed, it means erasure has completed.
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 lAMSL
2. Press the YES button when the display changes to “op change?”. When “Complete!” is displayed, it means erasure has completed.
knob when displayed as “op change”.
3
MDS-JE470
Display
spdl change
Table of Error Codes
Error Code
10
12
20
21
22
23
24
30
31
40
41
42
43
50
51
Could not load
Loading switches combined incorrectly
Timed out without reading the top of PTOC
Could read top of PTOC, but detected error
Timed out without accessing UTOC
Timed out without reading UTOC
Error in UTOC
Could not start playback
Error in sector
Retry cause generated during normal recording
Retried in DRAM overflow
Retry occurred during TOC writing
Retry aborted during S.F editing
Other than access processing, and could not read address.
Focus NG occurred and overran.
History
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 lAMSL 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.
TABLE OF CONTENTS
Description
1. SERVICING NOTES ........................................................ 5
2. GENERAL ........................................................................ 12
3. DISASSEMBLY
3-1. Disassembly flow .............................................................. 13
3-2. Upper Case (408226) ........................................................ 14
3-3. Front Panel Section ........................................................... 14
3-4. Main Board ....................................................................... 15
3-5. PT Board, VOL-SEL Board (SP model) ........................... 15
3-6. Mechanism Deck Section ( MDM-7A) ............................. 16
3-7. Over Light Head (HR901), BD Board .............................. 16
3-8. Holder Assy ....................................................................... 17
3-9. Loading Motor Assy (M103) ............................................ 17
3-10. Sled Motor Assy (M102), Slider ....................................... 18
3-11. Optical Pick-up.................................................................. 18
3-12. Spindle Moter Assy (M101).............................................. 19
4. TEST MODE ......................................................................20
MODEL IDENTIFICATION
— BACK PANEL —
MODEL
AEP, UK models
US model
CND model
SP models
HK model
AUS model
• Abbreviation CND : Canadian model SP : Singapore model HK : Hong Kong model AUS : Australian model
Part No.
PARTS No.
4-233-025-0s
4-233-025-1s
4-233-025-2s
4-233-025-3s
4-233-025-4s
4-233-025-5s
5. ELECTRICAL ADJUSTMENTS ............................... 25
6. DIAGRAMS
6-1. Circuit Boards Location ...................................................... 36
6-2. Block Diagrams
• BD Section ....................................................................... 38
• Main Section .................................................................... 39
6-3. Printed Wiring Board – BD Board – ................................... 40
6-4. Schematic Diagram – BD Section (1/2) – ........................... 41
6-5. Schematic Diagram – BD Section (2/2) – ........................... 42
6-6. Schematic Diagram – Main Section (1/2) – ........................ 43
6-7. Schematic Diagram – Main Section (2/2) – ........................ 44
6-8. Printed Wiring Board – Main Section – ............................. 45
6-9. Printed Wiring Board – Display Section – .......................... 46
6-10. Schematic Diagram – Display Section – .......................... 47
6-11. Printed Wiring Board – Power Section – ......................... 48
6-12. Schematic Diagram – Power Section – ............................ 49
6-13. IC Block Diagrams ........................................................... 50
6-14. IC Pin Functions ............................................................... 52
7. EXPLODED VIEWS
7-1. Chassis Section ................................................................... 59
7-2. Front Panel Section ............................................................. 60
7-3. Mechanism Section-1 (MDM-7A) ...................................... 61
7-4. Mechanism Section-2 (MDM-7A) ...................................... 62
8. ELECTRICAL PARTS LIST ........................................ 63
4
SECTION 1

SERVICE NOTES

MDS-JE470
SAFETY CHECK-OUT
(US model only)
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 AC 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 battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC 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)
To Exposed Metal Parts on Set
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.
0.15µF
1.5k
Earth Ground
AC voltmeter (0.75V)
Fig. A. Using an AC voltmeter to check AC leakage.
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.
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.
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
MDS-JE470
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 : Ground I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser) IOP : For measuring IOP (Check the deterioration of the optical pick-up laser) TE : TRK error signal (Traverse adjustment) VC : Reference level for checking the signal RF : RF signal (Check jitter) FE : Focus error signal
I+3V
GND
FE
RF
IOP
TE
VC
I+3V
IOP
GND
TE
FE VC RF
CN105
1
I+3V Iop GND TE FE VC RF
7
for
MDM-7A
6
MDS-JE470
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 “Ref=@@@.@” (@ 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 “Measu=@@@.@” (@ 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. “@@.@/##.#” is displayed and the recorded contents are displayed. @@.@ : indicates the Iop value labeled on the optical 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
MDS-JE470
OPTICAL PICK-UP BLOCK TYPE DISCRIMINATION
There are two types of the optical pick-up block in this model. These are compatible except for the laser power. Check the type of the optical pick-up block before replacement. Ajdust following items after replacing the optical pick-up block.
• 5-6-2. Laser Power Check (See page 28)
• 5-10. LASER POWER ADJUSTMENT (See page 31)
Differences
KMS-260B KMS-260E
Color of the adhesive agent at PDIC portion Pink White
Form of FPC retainer plate Close the hole on SL base Not close the hole on SL base
APC variable resistor Small volume (2 type)
Fig. B type is for repair.
• Abbreviation
260B: KMS-260B model
260E: KMS-260E model
Big variable resistor (3 type) and chip resistor (Fig. A)
Small variable resistor (2 type) and chip resistor (Fig. B)
Hold on SL base
Adhesive agent at PDIC portion
KSN-260B
FPC retainer plate
APC variable resistor
Hold on SL base
Adhesive agent at PDIC portion
KSN-260E
FPC retainer plate
(Fig A)
CHIP
3 type variable resistor
(Fig B)
CHIP
2 type variable resistor
8
MDS-JE470
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 28)
• 5-6-3. Iop Compare (see page 28)
• 5-6-4. Auto Check (see page 29)
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 CN406, and then attach it again.
[MAIN BOARD] (Component Side)
@
CN406
9
MDS-JE470
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. Insert the recordable disc.
2. Press MENU/NO button to display “Edit Menu” on the fluorescent display.
3. Turn l AMS L button to display “All Erase?” on the fluorescent display.
4. Press YES button to display “All Erase??” on the fluorescent display.
5. Press YES button, “Complete!” is displayed on the fluorescent display and it turns off immediately.
6. 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.
7. When the mode is set, “RTs 00c 00e 000” is displayed.
8. Press the z REC button to start recording. Then press the X button and start recording.
9. To check the “track mode”, press the H button to start play.
10.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 9.
Fig. 1 Reading the Test Mode Display (During recording and stop)
RTs@@c##c***
Fluorescent display tube display
@@ : Cause of retry ## : Number of retries *** : Number of retry errors
Reading the Retry Cause Display
Lower Bits
Hexadecimal
Bit
Binary
Higher Bits
84218421
b7 b6 b5 b4 b3 b2 b1 b0
00000001
00000010
00000100
00001000
00010000
00100000
01000000
10000000
Hexa-
decimal
01
02
04
08
10
20
40
80
Fig. 2 Reading the Test Mode Display (During playback)
@@###**$$
Fluorescent display tube display
@@ : Parts No. (name of area named on TOC) ### : Cluster ** : Sector $$ : Track mode (Track information such as copyright infor-
Cause of Retry Occurring conditions
shock
ader5
Discontinuous address
DIN unlock
FCS incorrect
IVR rec error
CLV unlock
Access fault
} Address (Physical address on disc)
mation of each part)
When track jump (shock) is detected
When ADER was counted more than five times continu-
ously
When ADIP address is not continuous
When DIN unlock is detected
When not in focus
When ABCD signal level exceeds the specified range
When CLV is unlocked
When access operation is not performed normally
10
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”.
Reading the Track Mode Display
Hexadecimal
Bit
Binary
Higher Bits Lower Bits
84218421
b7 b6 b5 b4 b3 b2 b1 b0
00000001
00000010
00000100
00001000
00010000
00100000
01000000
10000000
Hexa-
decimal
01
02
04
08
10
20
40
80
When 0 When 1
Emphasis OFF
Monaural
This is 2-bit display. Normally 01.
01:Normal audio. Others:Invalid
Audio (Normal)
Original
Copyright
Write prohibited
Details
MDS-JE470
Emphasis ON
Stereo
Invalid
Digital copy
No copyright
Write allowed
Reading the Display:
Convert the hexadecimal display into binary display. If more than two causes, they will be added.
Example When 84 is displayed:
Higher bit : 8 = 1000 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 Binary Hexadecimal Binary
0
1
2
3
4
5
6
7
0000
0001
0010
0011
0100
0101
0110
0111
8
9
A
B
C
D
E
F
1000
1001
1010
1011
1100
1101
1110
1111
11
MDS-JE470
Parts Identification
The items are arranged in alphabetical order. Refer to the pages indicated in parentheses ( ) for details.
Main unit
1
2
3
4
5
SECTION 2

GENERAL

6
7
8
9
This section is extracted from instruction manual.
0
qa
qs
qd
STANDBY
TIMER
RECOFF PLAY
PHONES PHONE LEVEL PC LINK
MIN MAX
(KEYBOARD)
qh
qg
qf
AMS wh
(15) (20) (25) (35) (39) CLEAR (23) (30) (40) Display window EJECT (11) (20) (25) GROUP ON/OFF
wg
A
8
wa
1)
GROUP
ON/OFF SKIP TIME
ql
LEVEL/
DISPLAY/CHAR
PLAY MODE REPEAT
qk
qj
(13) (22)
3
(31)
1)
GROUP SKIP INPUT (11)
ws
LEVEL/DISPLAY/CHAR
(13) (22) (31)
4
w;
(11) (21) (29) MD insertion slot MDLP indicator (14) (21) MENU/NO (15) (22) (25) (35)
6
7
qs
(39)
w;
wa
PC LINK (KEYBOARD)
(39)
1)
PHONE LEVEL PHONES jack PLAY MODE (20) (37) REC MODE (14) (22) REC (11)
z
wf
Remote sensor REPEAT (20)
ql
(21)
qh
1)
(17) (21) (36)
qg
qk
ws
2)
2
STANDBY indicator (11) (20)
1)
TIME TIMER YES (15) (23) (25) (35) (39)
qd
(17) (21)
5
1)
qf
(37)
1
1)
qj
EJECT
MDLP
INPUT REC MODE
wd
ws
REC
wf
MENU/
NO
CLEAR
wg
AMS
PUSH ENTER
YES
wh
BUTTON DESCRIPTIONS
(11) (20) (25)
1
`/1
(11) (20) (37) (40)
9
H
(11) (20) (39) (40)
0
X
(11) (20) (25) (37) (40)
qa
x m/M
(20) (26) (40)
wd
1) MDS-JE770 only.
2) MDS-JE770 only. For MDS­JE470, the remote sensor is located on the display window.
12
This set can be disassembled in the order shown below.
MDS-JE470
SECTION 3

DISASSEMBLY

3-1. DISASSEMBLY FLOW

3-3 FRONT PANEL SECTION
3-4 MAIN BOARD
SET
3-2 UPPER CASE (408226)
3-5 PT BOARD VOL-SEL BOARD (SP model)
3-7 BD BOARD
3-8 HOLDER ASSY
• Abbreviation SP : Singapore
3-6 MECHANISM DECK SECTION (MDM-7A)
3-7 OVER LIGHT HEAD (HR901)
3-7 BD BOARD
3-10 SLED MOTOR ASSY (M102)
Note 1: The processes enclosed with , remove in the any order. Note 2: You cannot go to the next process until every process enclosed with has done.
3-9 LOADING MOTOR ASSY (M103)
3-8 HOLDER ASSY
3-11 OPTICAL PICK-UP (KMS-260B/260E)
3-12 SPINDLE MOTOR ASSY (M101)
13
MDS-JE470

3-2. UPPER CASE (408226)

1
Two screws
(CASE 3TP2)
2
Case (408226)
1
Screw
(CASE 3TP2)
1
Two screws
(CASE 3TP2)

3-3. FRONT PANEL SECTION

5
Claw
4
Two screws
(+BVTP3x8)
3
Connector (CN830)
1
5
Claw
2
Connector (CN390)
Wire (flat type) (17core) (CN3)
14
6
Front panel
4
Two screws
(+BVTP3x8)

3-4. MAIN BOARD

6
Two screws
(+BVTP3x8)
4
Two screws
(+BVTP3x8)
5
screw (+BVTP3x8)
3
Connector (CN400)
2
Wire (flat type) (23core) (CN1)
1
Wire (flat type) (27core) (CN2)
7
MAIN board
MDS-JE470

3-5. PT BOARD, VOL-SEL BOARD (SP model)

7
VOL-SEL board (SP model)
4
1
Connector (CN900)
2
Connector (CN990) (SP model)
Nylom rivet (dia 3)
5
PT board
3
Three screws
(+PTTWH M3)
6
(+BVTP3x8) (SP model)
Two screws
15
MDS-JE470
s

3-6. MECHANISM DECK SECTION (MDM-7A)

2
Two step screws
(+BVTTWH M3)
3
Mechanism deck
2
Two step screws
(+BVTTWH M3)
1
Harnes

3-7. OVER LIGHT HEAD (HR901), BD BOARD

Note 1: If you disconnect the connector (CN104), you can remove the
BD board without removing the over write head (HR901).
Note 2: Be careful to handle the over write head (HR901) because it is
easy to be damaged.
3
Head, over light (HP901)
4
Remove the solder (four portion)
2
Screw (P1.7X6)
6
8
BD board
1
Connector (CN104)
16
4
Remove the solder (five portion)
5
Two screws (BTP2X6)
7
FLEXIBLE board (CN101)

3-8. HOLDER ASSY

1
Spring (holder), tension
5
6
Holder ASSY
4
Boss
4
Boss
3
MDS-JE470
2
Claw

3-9. LOADING MOTOR ASSY (M103)

2
Two screws (PWH1.7x2.5)
1
Belt (loading)
3
Motor ASSY, loading (M103)
17
MDS-JE470
d
)

3-10. SLED MOTOR ASSY (M102), SLIDER

4
Slider (EJ)
3
5
Remove the claw. Shift the slider in the arrow direction.
A
1
Two screws (BTP2X6)

3-11. OPTICAL PICK-UP

2
Guide (L)
6
Slider
7
Lever (CHG)
A
8
Lever (head)
9
Two screws
(PWH1.7X2.5)
0
Motor ASSY, sle
(M102)
1
FLEXIBLE board
0
9
Screw (P1.7X6)
2
SL base
Screw (M1.7), tapping
8
3
Gear (SD)
qa
Optical pick-up
(KMS-260B/260E)
7
Main shaft
6
Two screws (K2X6)
4
Screw (BTP2X6
5
Base (BU-A)
18

3-12. SPINDLE MOTER ASSY (M101)

2
Spindle motor ASSY (M101)
MDS-JE470
1
Three screws (M1.7), tapping
19
MDS-JE470
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) (C35)
• Laser power check mode (LDPWR CHECK) (C13)
• Laser power adjustment mode (LDPWR ADJUS) (C04)
• Iop check (Iop Compare) (C27)
• Iop value nonvolatile writing (Iop NV Save) (C06)
• Traverse (MO) check (EF MO CHECK) (C14)
• Traverse (MO) adjustment (EF MO ADJUS) (C07)
• 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 l AMS L knob and x button, connect the power plug to an outlet, and release the l AMS L
knob and x button. When the test mode is set, “[Check]” will be displayed. Rotating the l AMS L knob switches between the following three groups; ··· y Check y Service y Develop y ···.
Procedure 2: While pressing the l AMS L knob, connect the power plug to the outlet and release the l AMS L 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 l AMS L knob, YES button, and MENU/NO button. The functions of these buttons are as follows.
Function name
MENU/NO button
YES button
AMS knob
Left or Right
Push
Cancel or move to top hierarchy
Set
Select
Set submenu
Function
20
MDS-JE470
4-5. SELECTING THE TEST MODE
There are 26 types of test modes as shown below. The groups can be switched by rotating the l AMS L knob. After selecting the group to be used, press the YES button. After setting a certain group, rotating the l AMS L 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.
Display
AUTO CHECK
Err Display
TEMP ADJUS
LDPWR ADJUS
Iop Write
Iop NV Save
EF MO ADJUS
EF CD ADJUS
FBIAS ADJUS
AG Set (MO)
AG Set (CD)
TEMP CHECK
LDPWR CHECK
EF MO CHECK
EF CD CHECK
FBIAS CHECK
ScurveCHECK
VERIFYMODE
DETRK CHECK
0920 CHECK
Iop Read
Iop Compare
ADJ CLEAR
INFORMATION
CPLAY1MODE
CREC 1MODE
No.
Automatic self-diagnosis
C01
Error history display, clear
C02
Temperature compensation offset adjustment
C03
Laser power adjustment
C04
Iop data writing
C05
Writes current Iop value in read nonvolatile memory using microprocessor
C06
Traverse (MO) adjustment
C07
Traverse (CD) adjustment
C08
Focus bias adjustment
C09
Focus, tracking gain adjustment (MO)
C10
Focus, tracking gain adjustment (CD)
C11
Temperature compensation offset check
C12
Laser power check
C13
Traverse (MO) check
C14
Traverse (CD) check
C15
Focus bias check
C16
S-curve check
C17
Nonvolatile memory check
C18
Detrack check
C19
Most circumference check
C25
Iop data display
C26
Comparison with initial Iop value written in nonvolatile memory
C27
Initialization of nonvolatile memory for adjustment values
C28
Display of microprocessor version, etc.
C31
Continuous playback mode
C34
Continuous recording mode
C35
Details
Mark
Group
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.
21
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