DOWNLOAD Sony MDS-S9 Service Manual ↓ Size: 3.59 MB | Pages: 62 in PDF or view online for FREE

4

Error Code

Details of Error

10

Loading failed

12

Loading switch combination is illegal

20

Head of PTOC could not be read within the
specified time

21

Head of PTOC could be read but its content is
erroneous

22

Access to UTOC could not be made within the
specified time

23

UTOC could be not read within the specified
time

24

Content of UTOC is erroneous

30

Playing could not start

31

Content of sector is erroneous

40

Cause of retry occurred during normal recording

41

D-RAM overflowed and retry was executed

42

Retry was executed during the writing to TOC

43

S.F editing was interrupted by retry

50

Address could not be read except in access
processing

51

Focusing failed and it is out of control

60

Unlock retry

5

....................................

2

...............................................

6

................................................................... 10

3-1. Disassembly Flow ........................................................... 12
3-2. Case ................................................................................. 13
3-3. MD Mechanism Deck (MDM-7A) ................................. 13
3-4. MAIN Board ................................................................... 14
3-5. BD Board ......................................................................... 14

.............................................................. 15

......................... 20

6-1. Block Diagram – SERVO Section – ............................... 31
6-2. Block Diagram – MAIN Section – ................................. 32
6-3. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 33

6-4. Printed Wiring Boards – BD Board – ............................. 35
6-5. Schematic Diagram – BD Board (1/2) – ........................ 36
6-6. Schematic Diagram – BD Board (2/2) – ........................ 37
6-7. Printed Wiring Board

– MAIN Board (Component Side) – .............................. 38

6-8. Printed Wiring Board

– MAIN Board (Conductor Side) – ................................ 39

6-9. Schematic Diagram – MAIN Board (1/3) – ................... 40
6-10. Schematic Diagram – MAIN Board (2/3) – ................... 41
6-11. Schematic Diagram – MAIN (3/3)/PT Boards – ............ 42
6-12. Printed Wiring Board – PT Board – ............................... 43
6-13. Printed Wiring Board – DISPLAY Board – ................... 44
6-14. Schematic Diagram – DISPLAY Board – ...................... 45
6-15. IC Pin Function Description ........................................... 46

7-1. Case Section .................................................................... 52
7-2. Front Panel Section ......................................................... 53
7-3. Mechanism Deck Section-1 (MDM-7A) ........................ 54
7-4. Mechanism Deck Section-2 (MDM-7A) ........................ 55

............................... 56

0

0

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

• Keep the temperature of the soldering iron around 270 ˚C dur-

ing repairing.

• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering

or unsoldering.

This appliance is classified 
as a CLASS 1 LASER 
product.
The CLASS 1 LASER 
PRODUCT MARKING is 
located on the rear exterior.

The following caution label is located inside the unit.

Eksplosjonsfare ved feilaktig skifte av batteri.

Benytt samme batteritype eller en tilsvarende type

anbefalt av apparatfabrikanten.

Brukte batterier kasseres i henhold til fabrikantens

instruksjoner.

Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en likvärdig typ som
 rekommenderas av apparattillverkaren.
Kassera använt batteri enligt gällande föreskrifter.

Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.

Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.

Udskiftning må kun ske med batteri

af samme fabrikat og type.

Levér det brugte batteri tilbage til leverandøren.

Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by
the manufacturer.
Discard used batteries according to the manufacturer’s instructions.

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.

6

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.

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)

GND : Ground
TE

: Tracking error signal (Traverse adjustment)

FE

: Focus error signal

VC

: Reference level for checking the signal

RF

: RF signal (Check jitter)

I+3V

CN105

IOP

TE

VC

GND

FE

RF

I+3V
IOP
GND
TE
FE
VC
RF

I+3V

IOP

GND

TE
FE

VC

RF

1

7

for

MDM-7A

The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.

Never look into the laser diode emission from right above when
checking it for adjustment. It is feared that you will lose your sight.

7

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 

[       AMS       ]

 knob and x button simultaneously, connect the power plug to the outlet, and release the 

[       AMS       ]

knob and x button simultaneously to display “[Check]”.

2. Turn the 

[       AMS       ]

 knob to display “[Service]”, and press the 

[YES]

 button to display “AUTO CHECK” (C01).

3. Turn the 

[       AMS       ]

 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 : Turn the 

[       AMS       ]

 knob.

To select the digit

: Press the 

[       AMS       ]

 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” (C05).

9. Press the

I/1

button to complete.

Display Precedure:
1. While pressing the 

[       AMS       ]

 knob and  x  button simultaneously, connect the power plug to the outlet, and release the 

[       AMS       ]

knob and x  button simultaneously to display “[Check]”.

2. Turn the 

[       AMS       ]

 knob to display “[Service]”, and press the 

[YES]

 button to display “AUTO CHECK” (C01).

3. Turn the 

[       AMS       ]

 knob to display “Iop Read” (C26), and press the 

[YES]

 button.

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 

[       AMS       ]

 knob or 

[MENU/NO]

 button to display “Iop Read” (C26). Then press the

I/1

button.

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. Enter the test mode (refer to page 15).
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 both

x

and

Z

buttons simultaneously.

4. Turn the 

[       AMS       ]

 knob to display “MDM-7A”.

5. Press the 

[       AMS       ]

 button. 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.

You can reset the microprocessor of the system with following procedure.
Use this method if the device cannot be operated normaly because the microprocessor is hung up or with some reasons.

Procedure:
Remove the short pin attached on CN420, then install it again.

.        >

.        >

.        >

.        >

.        >

.        >

.        >

.        >

.        >

.        >

.        >

.        >

.        >

CN420