Sony MDS-SD1 Service Manual ▷ View online
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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.
Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.
Procedure :
Short-circuit jumper wire of JW40 and JW41 (RESET).
Short-circuit jumper wire of JW40 and JW41 (RESET).
[MAIN BOARD] (Component Side)
1
3
JW40
IC821
JW42
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CLEANING OF OBJECTIVE LENS OF OPTICAL PICKUP
• When cleaning the objective lens of the optical pickup, move the mechanism deck using the following method.
1 If a disc is inside, eject it out.
2 Disconnect the power cord from the outlet, and set the non-conducted state.
3 Using a pair of tweezers, while pulling the claw at A towards B, move part C in direction D.
4 Move part C to a position which allows it to be cleaned easily, and clean.
2 Disconnect the power cord from the outlet, and set the non-conducted state.
3 Using a pair of tweezers, while pulling the claw at A towards B, move part C in direction D.
4 Move part C to a position which allows it to be cleaned easily, and clean.
A
C
B
D
Objective lens of
optical pick-up
optical pick-up
FLUORESCENT INDICATOR TUBE AND MECHANISM DECK
• The fluorescent indicator tube will not display anything if the mechanism deck is not connected to the MAIN board.
Before servicing, check the connection of the cables connecting these parts first.
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ATTACHING THE GLASS ASSEMBLY
• Attach according to steps 1 to 4.
1
1
2
(Bottom side)
3
Bracket (shaft)
4
Screw (PTP2.6x6)
When fixing this part, secure at the
center to allow for some play.
Open and close the glass window
several times, and check that the
parts do not touch each other.
center to allow for some play.
Open and close the glass window
several times, and check that the
parts do not touch each other.
FLUORESCENT INDICATOR TUBE, LED COMPLETE LIGHTING CHECK
• The fluorescent indicator tube and LED complete lighting and key check mode of this unit can be performed as follows.
Procedure:
1. While pressing the ENTER/YES and
1. While pressing the ENTER/YES and
rREC buttons, insert the power plug into the outlet, and turn ON the power.
2. “FL All On Key” will be displayed momentarily, after which immediately the fluorescent indicator tube and LED will light up completely.
3. The fluorescent display tube will go off part by part each time a button is pressed. When all buttons have been pressed, “Push Yen” will be
3. The fluorescent display tube will go off part by part each time a button is pressed. When all buttons have been pressed, “Push Yen” will be
displayed.
4. When the ENTER/YES button is pressed next, “Seg Chk” will be displayed momentarily.
5. Checkered pattern will be displayed on the fluorescent display tube.
6. When the ENTER/YES button is pressed next, “Jog & LED Chk” will be displayed.
7. The LED lighting state changes each time the –
5. Checkered pattern will be displayed on the fluorescent display tube.
6. When the ENTER/YES button is pressed next, “Jog & LED Chk” will be displayed.
7. The LED lighting state changes each time the –
˜ + knob is rotated.
(The LED will stop reacting after the knob has been rotated to some extent. This is not a fault.)
8. When the ENTER/YES button is pressed, “Check End” will be displayed on the fluorescent indicator tube, and the check mode ends.
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SERVICING POSITION
1 Remove the four screws securing the upper cover, and remove the upper cover.
2 Undo the bound cables.
3 Remove the two screws A securing the rear panel.
4 Remove the four screws B securing the transformer.
5 Remove the screw C securing the MAIN board.
6 Remove the MAIN board with the rear panel.
2 Undo the bound cables.
3 Remove the two screws A securing the rear panel.
4 Remove the four screws B securing the transformer.
5 Remove the screw C securing the MAIN board.
6 Remove the MAIN board with the rear panel.
A
B
B
C
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