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5-7. TRAVERSE (E-F BALANCE) ADJUSTMENT
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 os-
cilloscope as shown in the following figure so that it
can be seen more clearly.
BD board
CN110 pin 3 (TEO)
CN110 pin 2 (VC)
Connection:
BD board
CN110 pin 3 (TEO)
CN110 pin 2 (VC)
Adjusting Method:
1. Connect an oscilloscope to CN110 pin 3 (TEO) and CN110
pin 2 (VC) of the BD board.
2. Load a MO disc (any available on the market). (Refer to note
1.)
3. Press the CHARACTER button or SCROLL button and
move the optical pick-up to outer circumference outside the
pit area.
4. Press the = 0 button or ) + button and display
"EFBAL ADJUST".
5. Press the YES button and display "EFB=
TE
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(Laser power READ power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
6. Press the = 0 button or ) + button so that the
waveforms of the oscilloscope becomes the specified value.
(When the = 0 button or ) + button is pressed,
the " " of "EFB=
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.
(MO read power traverse adjustment)
(Traverse Waveform)
VC
specification: A=B
7. Press the YES button, and save the result of adjustment to
the non-volatile memory.
("EFB=
SAVE" will be displayed for a moment. Then
"EFB=
MO-W" will be displayed.)
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oscilloscope
(DC range)
330 k Ω
+
–
10 pF
oscilloscope
(DC range)
+
V: 0.1 V/div
–
H: 10 ms/div
MO-R".
MO-R" changes and the waveform
A
B
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2 9
8
8. Press the = 0 button or ) + button so that the
waveforms of the oscilloscope becomes the specified value.
(When the = 0 button or ) + button is pressed,
the " " of "EFB=
changes.)
In this adjustment, waveform varies at intervals of approx.
2%. Adjust the waveform so that the specified value is satis-
fied as much as possible.
(MO write power traverse adjustment)
(Traverse Waveform)
VC
specification: A=B
9. Press the YES button, and save the result of adjustment to
the non-volatile memory.
("EFB=
SAVE" will be displayed for a moment. Then
"EFB=
MO-P" will be displayed.)
10. The optical pick-up moves to the pit area automatically and
servo is locked.
11. Press the = 0 button or ) + button until the
waveforms 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)
Q Q
3
6 7
1 3
1 5
VC
specification: A=B
12. Press the YES button, and save the result of adjustment to the
non-volatile memory.
("EFB=
SAVE" will be displayed for a moment. Then
"EFBAL CD" will be displayed.)
The disc stops rotating automatically.
13. Press the 6 button and remove the MO disc.
14. Load the test disc TDYS-1.
15. Press the YES button and display "EFB=
Servo is imposed automatically.
16. Press the = 0 button or ) + button until the
waveforms 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)
VC
specification: A=B
17. Press the YES button, and save the result of adjustment to the
co
non-volatile memory.
("EFB=
SAVE" will be displayed for a moment. Then
.
"EFBAL ADJUST" will be displayed.)
18. Press the 6 button and remove the test disc TDYS-1.
– 15 –
9 4
2 8
MO-W" changes and the waveform
A
B
0 5
8
2 9
9 4
2 8
A
B
CD".
A
B
m
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