Sony MDS-M100 Service Manual page 26

7. Then, turn the =
AMS
CHECK" (C02).
[YES]
8. Press the button once and 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 and display "LD 7.0 mW $
". Check that the reading the laser power meter and digital
volt meter satisfy the specified value.
Note down the digital voltmeter reading value.
Specification:
Laser power meter reading : 7.0 ± 0.2 mW
Digital voltmeter reading : Optical pick-up displayed value
±10%
(Optical pick-up label)
KMS260A
27X40
B0825
lOP=82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 ( Ω )
[MENU/NO]
10. Press the button and display "LDPWR CHECK"
and stop the laser emission.
[MENU/NO]
(The button is effective at all times to stop the
laser emission.)
11. Turn the = + knob to display "Iop Write"(C28).
AMS
[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 between "LD 0.7 mW $
", and "LD Wp
here.
+ knob and display "LDPWR
[YES]
+ knob.
AMS
+ knob.
AMS
[YES]
button is pressed, the display
", "LD 6.2 mW $
$ ". Nothing needs to be performed
11. TRAVERSE 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 oscilloscope
as shown in the following figure so that it can be seen more
clearly.
BD board
CN110 pin 3 (TEO)
CN110 pin 1 (VC)
Connection :
BD 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) of the BD board.
2. Load a disc (any available on the market). (Refer to Note 1)
[ ]
3. Press the ) button and move the optical pick-up outside
the pit.
4. Turn the =
AMS
(C10).
[YES]
5. Press the button and display "EFB =
(Laser power READ power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
6. Turn the =
AMS
oscilloscope becomes the specified value.
(When the =
" changes and the waveform changes.) In this adjustment,
waveform varies at intervals of approx. 2%. Adjust the wave-
form so that the specified value is satisfied as much as pos-
sible.
(Read power traverse adjustment)
(Traverse Waveform)
VC
Specification A = B
[YES]
7. Press the
the non-volatile memory ("EFB =
for a moment. Then "EFB =
– 26 –
oscilloscope
(DC range)
330 k Ω
+
–
10 pF
oscilloscope
(DC range)
+
V: 0.1 V/div
–
H: 10 ms/div
+ knob and display "EF MO ADJUST"
+ knob so that the waveform of the
+ knob is turned, the
AMS
button and save the result of adjustment to
SAV" will be displayed
MO-W" will be displayed).
MO-R".
of "EFB=
A
B