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MDS-SE9

6. Press the

button so that the reading of

the laser power meter becomes the specified value, press the

[ENTER/START]

button to save it.

Note:

Do not perform the emission with 8.65mW more than 15 seconds
continuously.

Specified Value:

7. Then,press the

button to display

“LDPWR CHECK” (C13).

8. Press the

[ENTER/START]

button once to display “L 0.93mW$

”. Check that the reading of the laser power meter matches

with the specified value.

Specified Value:

9. Press the

[ENTER/START]

button once more to display “L

8.65mW$

”. Check that the reading the laser power meter

and digital voltmeter satisfy the specified value.
Note down the digital voltmeter reading value.

Specified Value:
Laser power meter reading :

8.10 to 8.70mW (KMS-262A)
8.40 to 8.90mW (KMS-262E)

Digital voltmeter reading

: Value on the optical pick-up label ±10%

10. Press the

[MODE]

button to display “LDPWR CHECK”

(C13) and stop the laser emission.
(The

[MODE]

button is effective at all times to stop the laser

emission)

11. Press the

button to display “Iop Write”

(C05).

12. Press the

[ENTER/START]

button. When the display becomes

Ref=@@@.@ (@ is an arbitrary number), press the

[ENTER/

START]

button to display “Measu=@@@.@” (@ is an arbitrary

number).

13. The numbers which can be changed will blink. Input the Iop

value noted down at step 9.
To select the number : Press the

button.

To select the digit

: Press the

[TAPE REC]

button.

14. When the

[ENTER/START]

button is pressed, “Complete!” will be

displayed momentarily. The value will be recorded in the non-
volatile memory and the display will become “Iop Write” (C05).

Note:

After step 9, each time the

[ENTER/START]

button is pressed, the

display will be switched to “L 0.73mW$

”, “L 7.70mW$

”

“L WP

” Nothing needs to be performed here.

11. Iop NV Save

Write the reference values in the nonvolatile memory to perform
“Iop compare”. As this involves rewriting the reference values, do
not perform this procedure except when adjusting the laser power
during replacement of the optical pick-up and when replacing the
IC102. Otherwise the optical pick-up check may deteriorate.

Note:

Perform this function with the optical pick-up set at room temperature.

Procedure:
1. Press the

button to display “Iop NV Save”

(C06).

2. Press the

[ENTER/START]

button and display “Iop [stop]”.

12. Traverse Adjustment

Connection:

Procedure:
1. Connect an oscilloscope to CN105 pin

(TE) and CN105 pin

(VC) on the BD board.

2. Load a disc (any available on the market). (Refer to Note 1)
3. Press the

TAPE

button to move the optical pick-up outside

the pit.

4. Press the

button to display “EF MO

ADJUST” (C07).

5. Press the

[ENTER/START]

button to display “EFB =

MO-R”.

(Laser power READ power/Focus servo ON/tracking servo OFF/
spindle (S) servo ON)

6. Press the

button so that the waveform of

the oscilloscope becomes the specified value.
(When the

button is pressed, the

“EFB=

” changes and the waveform changes) In this adjustment,

waveform varies at intervals of approx. 2%. Adjust the waveform
so that the specified value is satisfied as much as possible.
(Read power traverse adjustment)

Traverse Waveform

Note 1:

Data will be erased during MO reading if a recorded disc is
used in this adjustment.

Note 2:

If the traverse waveform is not clear, connect the oscilloscope
as shown in the following figure so that it can be seen more
clearly.

KMS262E

20101

B0576

lop=57.6 mA in this case
lop (mA) = Digital voltmeter reading (mV)/1 (

Ω

)

(Optical pick-up label)