Sony MDS-JE510 - Mini Disc Player Recorder User manual

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Model Name Using Similar Mechanism MDS-JE500
MD Mechanism Type MDM-3A/3B
Optical Pick-up Type KMS-260A/J1N
MDS-JE510
SERVICE MANUAL
US Model
Canadian Model
AEP Model
UK Model
E Model
MINIDISC DECK
MICROFILM
SPECIFICATIONS
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Photo: AEP model

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CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by
the equipment manufacturer.
Discard used batteries according to manufacture’s instructions.
ADVARSEL!
Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.
ADVARSEL
Eksplosjonsfare ved feilakting skifte av batteri.
Benytt samme batteritype eller en tilsvarende type anbefalt av
apparatfabrikanten.
Brukte batterier katterier kasseres i henhold til fabrikantens
VARNIG
Explosionsfara vid felaktigt batteribyte.
Användsammabatteritypellerenlikvärdigtypsomrekommenderas
av apparattillverkaren.
Kassera använt batteri enligt gällande föreakrifter.
VAROITUS
Parist voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
CAUTION
Use of controls or adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
This appliance is classified as a
CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
This caution
label is located
inside the unit.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINE
WITH MARK !ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LESCOMPOSANTSIDENTIFIÉSPAR UNE MARQUE!SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT.NE REMPLACER CES COMPOSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS
SONT DONNÉS DANS CE MANUEL OU DANS LES
SUPPLÉMENTS PUBLIÉS PAR SONY.

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To Exposed Metal
Parts on Set
0.15µF 1.5k
Ω
AC
voltmeter
(0.75V)
Earth Ground
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety checks before releasing the set to the customer:
Checktheantennaterminals,metaltrim,“metallized”knobs,screws,
and all other exposed metal parts forAC 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
returnto chassis, must not exceed 0.5 mA (500 microampers). Leak-
age 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 aVOM
or battery-operatedAC 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 pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
4-985-670-6
4-985-670-7
4-985-670-8
4-985-670-9
4-990-650-1
4-990-651-0
4-990-651-1
Parts No. Model
US model
Canadian model
E, Singapore model
Hong Kong model
AEP, German model
AEP, German model
UK model
Product country
MALAYSIA
MALAYSIA
MALAYSIA
MALAYSIA
JAPAN
MALAYSIA
MALAYSIA
TABLE OF CONTENTS
1. SERVICING NOTE .......................................................... 4
2. GENERAL .......................................................................... 7
3. DISASSEMBLY
3-1. Case and Front PanelAssembly.......................................... 20
3-2. Bracket (T), (L) and (R)...................................................... 20
3-3. BD Board ........................................................................... 21
3-4. SUB Chassis........................................................................ 21
3-5. Shutter Assembly ................................................................ 22
3-6. Over Write Head ................................................................. 22
3-7. Slider Complete Assembly.................................................. 23
4.TEST MODE ..................................................................... 24
5. ELECTRICAL ADJUSTMENTS ............................... 27
6. DIAGRAMS
6-1. Circuit Boards Location ...................................................... 32
6-2. Brock Diagrams
• BD Section ....................................................................... 33
• Main Section .................................................................... 35
6-3. Printed Wiring Board — BD Section —............................. 37
6-4. Schematic Diagram — BD Section — ............................... 39
6-5. Schematic Diagram — Main Section — ............................ 43
6-6. Printed Wiring Board — Main Section —.......................... 47
6-7. Printed Wiring Board — Panel Section — ......................... 51
6-8. Schematic Diagram — Panel Section — ............................ 55
6-9. IC Brock Diagrams ............................................................. 57
6-10. IC Pin Functions ............................................................... 63
7. EXPLODED VIEWS
7-1. Main Section ....................................................................... 72
7-2. Front Panel Section ............................................................. 73
7-3. Mechanism Deck Section (1) (MDM-3A/3B) .................... 74
7-4. Mechanism Deck Section (2) (MDM-3A/3B) .................... 75
8. ELECTRICAL PARTS LIST ........................................ 76
MODEL IDENTIFICATION
— BACK PANEL —
Parts No.

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SECTION 1
SERVICING NOTE
JIG FOR CHECKING BD BOARD WAVEFORM
The special jig (J-2501-124-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.
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)
TEO : TRK error signal (Traverse adjustment)
VC : Reference level for checking the signal
RF : RF signal (Check jitter)
IOP
I + 3V
TEOVCRF
Mechanism deck
CN110
Jig
(J-2501-124-A)
FORCED RESET
The system microprocessor can be reset in the following way.
Use these methods when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.
Method :
Disconnect the power plug, short-circuit jumper wire of JW70 and JW181.
[MAIN BOARD] (Component Side)
IC301
JW70 BT301 JW181
Jumper wire

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RETRY CAUSE DISPLAY MODE
• In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent display tube.
This is useful for locating the faulty part of the unit.
• The data amount stored in D RAM, number of retries, and retry cause are displayed. Each is displayed in hexadecimal number.
• The display of the D RAM data amount enables data reading, accumulation, ejection, and writing to be performed smoothly. If writing is
not smooth, data may decrease considerably.
Method:
1. Load a recordable disc whose contents can be erased into the unit.
2. Press the EDIT/NO button several times to display “All Erase?” on the fluorescent display tube.
3. Press theYES button.
4. When “All Erase??” is displayed on the fluorescent display tube, the numbers on the music calendar will start blinking.
5. Press theYES button to display “Complete”, and press the pbutton immediately and continue pressing for about 10 seconds.
6. When the “TOC” displayed on the fluorescent display tube goes off, release the pbutton.
7. Press the rREC button to start recording.
8. Press the DISPLAY/CHAR button to display the test mode (Fig. 1), and check the display.
9. The Rt value increases with each retry. If an error occurs after a retry, “Retry Error” will be displayed, and the number of retries counted
will be set back to 0.
10. To exit the test mode, press the POWER button. Turn OFF the power, and after “TOC” disappears, disconnect the power plug from the
outlet.
Fig. 1 Reading theTest Mode Display
SC @@ Rt # # ∗∗
Fluorescent DisplayTube Signs
@@ : Displays the DRAM memory amount when at all times.
# # : Displays the number of retries. When a retry error occurs, the number will be set back to 0.
* * : Cause of retry
All three displays above are in hexadecimal numbers.

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Reading the Retry Cause Display
Hexadecimal
Bit
Binary
Higher Bits Lower Bits
84218421
b7 b6 b5 b4 b3 b2 b1 b0
00000000
00000001
00000010
00000100
00001000
00010000
00100000
01000000
10000000
When spindle rotation is detected as slow
(Not used)
When ADER was counted more than
five times continuously
When ADIP address is not continuous
(Not used)
When not in focus
When ABCD signal level exceeds the specified range
When CLV is unlocked
When access operation is not performed normally
Hexa-
decimal
Spindle is slow
(Not used)
ader5
Discontinuousaddress
(Not used)
FCS incorrect
IVR rec error
CLV unlock
Access fault
Cause of Retry Occurring conditions
00
01
02
04
08
10
20
40
80
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 nb6
Lower bit : 2 = 0010 nb1
In this case, the retry cause is combined of “CLV unlock” and “ader5”.
When A2 is displayed:
Higher bit : A = 1010 nb7+b5
Lower bit : 2 = 0010 nb1
The retry cause in this case is combined of “access fault”, “IVR rec error”, and “ader5”.
Hexadecimal n Binary Conversion Table
Hexadecimal Binary Hexadecimal Binary
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111

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SECTION 2
GENERAL
Location of Parts and Controls
134
56
78
9
10 11 12
13
14
15
16
2
19
202122
23
1 POWER switch
2 Remote sensor
3 Display window
4 Disc compartment
5 AMS knob
6 DISPLAY/CHAR button
70/)buttons
8 SCROLL button
9 PLAY MODE button
10 REC MODE switch
11 INPUT switch
12 REC LEVEL knob
13 PHONE LEVEL knob
14 PHONES jack
15 rREC (recording) button
16 p(stop) button
17 REPEAT button
18 P(pause) button
19 ·(play) button
20 YES button
21 EDIT/NO button
22 §EJECT button
23 TIMER switch
1817

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This section is extracted from
instruction manual.

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SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. CASE AND FRONT PANEL ASSEMBLY
1 Two screws
claw
6 Two screws
(BVTT2x3)
5 Bracket (joint)
3-2. BRACKET (T), (L) AND (R)
7 Bracket (L)
8 Two screws
(BVTT2x3)
9 Bracket (R)
2 Bracket (T)
1 Four screws
(BVTT2x3)
4 Screw (BVTT2x3)
3 Screw (BVTT2x3)
2 Two screws
4 Case
3 Screw
7 Flat type wire
(CN303)
claw
9 Four screws
5 Screw
6 Wire
8 Three screws
0 Remove the front panel assembly
releasing two claws.