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(5) Stide offset
Confirm the STOP mode (indicating [/ /).
a2
Connection of measuring equipment.
4
Connect test point (SLIDE OFFSET)
located the
_- —==smyscilloscope
side
of VR106
to the oscilloscope
+ side, and
ground - side to the GND.
Ground the input terminal of oscilloscope to con-
firm the base tine. Then select oscilloscope input
mode at DC range, sweep time as 1ms ~ 2ms/div,
SLIDE OFFSET Q——————_———_0
+
sensitivity as high (0.02 V ~ 0.05 V/div when 10:1
terminal
|
probe is used) to make judging 0.1 V.
GND O———_———__,°
—
GB) Adjustment
Adjust VR106 so that the waveform becomes OV
+ 0.1 V on the oscilloscope.
(6) Tracking offset
Equipment setup
*TEO : Tracking Error Out
|
|
;
{
|
st
|
i
i
(2) Push 4 OPEN/CLOSE button to open the holder,
put the disc for adjustment on the tray, and push
the button
again to close the holder.
When the
service program
is initialized, the laser P.U. is set
to the optimum position.
A
a
(3) Push P PLAY button to start the disc,
(4) Ground the oscilloscope input terminal to confirm
;
the base line, and set the oscilloscope input to DC
range,
0.1 V/div (when
10:1
probe is used), and
sweeping time as 1 ms ~ 2 ms/div.
(©) Adjust VR101 so that the amplitude of A equals B
as per figure on the right.
Base Line
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