Service manual
35
12. Press the ENTER/YES “R” button. When the display becomes
Ref=@@@.@ (@ is an arbitrary number), press the ENTER/
YES “R” 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 l m or M L button.
To select the digit : Press the [SYNC REC] button.
14. When the ENTER/YES “R” 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”.
Note 1: After step 4, each time the ENTER/YES “R” button is pressed,
the display will be switched “LD 0.7 mW $ ”, “LD 6.2 mW $
”, and “LD Wp $ ”. Nothing needs to be performed
here.
5-11. TRAVERSE ADJUSTMENT
Connection :
Adjusting Procedure :
1. Connect an oscilloscope to CN110 pin 3 (TEO) and CN110
pin 1 (VC) on the BD (MD) board.
2. Load a disc (any available on the market). (Refer to Note 1)
3. Press the M L button to move the optical pick-up outside
the pit.
4. Press the l m or M L button to display “EF MO
ADJUST”.
5. Press the ENTER/YES “R” button to display “EFB = MO-R”.
(Laser power READ power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
6. Press the l m or M L button so that the waveform
of the oscilloscope becomes the specified value.
(When the l m or M L button is pressed, the of
“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
+
–
oscilloscope
(DC range)
V: 0.1 V/div
H: 10 ms/div
BD (MD) board
CN110 pin
3
(TEO)
CN110 pin
1
(VC)
+
–
oscilloscop
e
(DC range)
10 pF
330 k
Ω
CN110 pin
3
(TEO)
CN110 pin
1
(VC)
BD (MD) board
A
B
VC
Specification A = B
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.
7. Press the ENTER/YES “R” button and save the result of adjust-
ment to the non-volatile memory (“EFB = SAVE” will be
displayed for a moment. Then “EFB = MO-W” will be dis-
played).
8. Press the l m or M L button so that the waveform
of the oscilloscope becomes the specified value.
(When the l m or M L button is pressed, the of
“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.
(Write power traverse adjustment)
Traverse Waveform
9. Press the ENTER/YES “R” button, and save the adjustment
results in the non-volatile memory. (“EFB = SAVE” will be
displayed for a moment)
10. “EFB = MO-P” will be displayed.
The optical pick-up moves to the pit area automatically and
servo is imposed.
11. Press the l m or M L button until the waveform of
the oscilloscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
Traverse Waveform
12. Press the ENTER/YES “R” button, and save the adjustment
results in the non-volatile memory. (“EFB = SAVE” will be
displayed for a moment)
Next “EF MO ADJUST” is displayed. The disc stops rotating
automatically.
13. Press the A (MD) button and take out the disc.
14. Load the check disc (MD) TDYS-1.
15. Press the l m or M L button to display “EF CD
ADJUST”.
16. Press the ENTER/YES “R” button to display “EFB = CD”.
Servo is imposed automatically.
17. Press the l m or M L button so that the waveform
of the oscilloscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
Traverse Waveform
A
B
VC
Specification A = B
A
B
VC
Specification A = B
A
B
VC
Specification A = B