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– 5 –

• 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.

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

aged by heat.

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 instruc-
tions.

CAUTION

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

Laser component in this product is capable of emitting radia-
tion exceeding the limit for Class 1.

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

This caution
label is located
inside the unit.

!

!

!

– 6 –

1 Remove the fourteen screws (3 

×

 8) from the bottom plate (refer to page 87).

2 Remove the bottom plate.
3 Rotate the pulley gear in the arrow direction A, and open the tray assembly in the

arrow direction B.

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 :
Disconnect the power plug from the socket, and short-circuit the pin 1 and pin 3 of CN703 on the BT board with tweezers, etc. to
discharge the backup battery.

[BT Board] (Conductor Side)

pully gear

tray assembly

A

B

CN703

BT701

1

3

– 7 –

The special jig (J-2501-149-A) is useful for checking the waveform of the BD board. The manes of terminals and the checking items to be
performed are shown as follows.

GND : Ground
I + 3 V : 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)

RF

5P connector

6P connector

VC

TEO

IOP

I+3V

GND

RF
VC
TEO

MDM-3

MDM-5
MDM-6

IOP
I-3V

VC
RF
TEO
IOP
I+3V
GND

VC

RF

TEO

IOP

I+3V

GND

1

5

1

6

– 8 –

The IOP value labeled on the 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 pick-up or non-volatile memory (IC171 of BD board), record the IOP
value on the pick-up according to the following procedure.

Record Precedure:
1. While pressing the 

[        AMS        ]

 knob and 

p button, connect the power plug to the outlet, and release the 

[        AMS        ]

 knob

and 

p button.

2. Rotate the 

[        AMS        ]

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

[YES]

 button.

3. Rotate the 

[        AMS        ]

 knob to display “lop.Write” (C28), 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 

[        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”.

9. Press the 

[REPEAT]

 button to complete. “Standby” will be displayed.

Display Precedure:
1. While pressing the 

[        AMS        ]

 knob and  

p  button, connect the power plug to the outlet, and release the 

[        AMS        ]

 knob

and  

p  button.

2. Rotate the 

[        AMS        ]

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

[YES]

 button.

3. Rotate the 

[        AMS        ]

 knob to display “lop.Read” (C27).

4. “@@.@/##.#” is displayed and the recorded contents are displayed.

@@.@ : indicates the Iop value labeled on the pick-up.
##.#

: indicates the Iop value after adjustment

5. To end, press the 

[        AMS        ]

 button or 

[MENU/NO]

 button to display “Iop Read”. Then press the 

[REPEAT]

 button to display

“Standby”.

[  ]

[  ]

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