Sony MXD-D3 Service Manual page 35

[ AMS
6. Turn the
l L
the laser power meter becomes 6.9 to 7.1 mW, press the
button to save it.
Note: Do not perform the emission with 7.0 mW more than 15 seconds
continuously.
[ AMS
7. Then, turn the l
"LDPWR CHECK" (C02).
[YES]
8. Press the button once to display "LD 0.9 mW $
Check that the reading of the laser power meter become 0.85
to 0.91 mW.
[YES]
9. Press the button once more to display "LD 8.4 mW $
". 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 : 8.4 ± 0.2 mW
Digital voltmeter reading : Value on the optical pick-up label
±10%
(Optical pick-up label)
KMS262A
27X40
B0825
lOP=82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 ( Ω )
[MENU/NO]
10. Press the button to display "LDPWR CHECK"
and stop the laser emission.
[MENU/NO]
(The button is effective at all times to stop the
laser emission.)
[ AMS
11. Turn the
l L
(C28).
[YES]
12. Press the button. When the display becomes
Ref=@@@.@ (@ is an arbitrary number), press the
button to display "Measu=@@@.@" (@ is an arbitrary num-
ber).
13. The numbers which can be changed will blink. Input the Iop
value noted down at step 9.
To select the number : Turn the
To select the digit : Press the
[YES]
14. When the button is pressed, "Complete!" will be dis-
played 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
will be switched "LD 0.7 mW $
"LD Wp $
]
(MD) knob so that the reading of
]
L (MD) knob to display
]
(MD) knob to display "Iop Write"
[ AMS ]
(MD) knob.
l L
[ AMS ]
l L (MD) knob.
[YES]
button is pressed, the display
", "LD 7.5 mW $
". Nothing needs to be performed here.
11. TRAVERSE ADJUSTMENT
[YES]
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.
".
BD (MD) board
CN110 pin 3 (TEO)
CN110 pin 1 (VC)
Connection :
BD (MD) board
CN110 pin 3 (TEO)
CN110 pin 1 (VC)
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
side the pit.
[
4. Turn the l
ADJUS" (C10).
[YES]
5. Press the
(Laser power READ power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
[
6. Turn the l
of the oscilloscope becomes the specified value.
[
(When the
[YES]
"EFB= " changes and the waveform changes.) In this ad-
justment, 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
VC
", and
[YES]
7. Press the
non-volatile memory ("EFB =
a moment. Then "EFB =
oscilloscope
(DC range)
330 k Ω
10 pF
oscilloscope
(DC range)
+
–
(MD) button to move the optical pick-up out-
AMS ]
L (MD) knob to display "EF MO
button to display "EFB =
AMS ]
L (MD) knob so that the waveform
AMS ]
(MD) knob is turned, the
l L
Specification A = B
button and save the result of adjustment to the
SAV" will be displayed for
MO-W" will be displayed).
+
–
V: 0.1 V/div
H: 10 ms/div
MO-R".
of
A
B
35