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UD-301/351
HANDLING PRECAUTIONS
ADJUSTMENT
The pickup (KSS-240A) is assembled and adjusted with
high precision by the parts' manufacturer. Refrain from
disassembling and adjusting it carelessly.
CD PLAYER (X-B3)
Input setting
Output setting
Tracking Blance
VR2
Player setting
Adjustment point
KSS-240A
VR3
VR1
Adjustment method
Laser power
TEST DISC TYPE 4
Enter 1.0 kHz 0.1
Vrms signal in pins
2-3 of CN3.
Focus gain
TEST DISC TYPE 4
Enter 1.3 kHz 0.1
Vrms signal in pins
5-6 of CN3.
Tracking gain
Note:
TEST DISC TYPE4
— SONY
YEDS-18
TEST DISC or equiralent.
LPF — 47 k + 390 pF or so.
(a) Adjustment Laser power
0.08~0.15mW
Laser power meter
28
Place the sensor
unit of the optical
poer meter on the
pickup lens.
Attach LPF to pins
2 and 3 of CN3,
and then connect
an oscilloscope or
AC voltmeter.
Attach LPF to pins
5 and 6 of CN3,
and then connect
an oscilloscope or
AC voltmeter.
Short-circuit the
test pin, and set
the operation to
the TEST MODE
Push the PLAY
key.
Push PLAY key.
FOCUS GAIN
VR2
TRACKING GAIN
VR1
0.08 to 0.15 mW
The pickup is OK
of RF level is 1.0
Vp-p TE [servo
OPEN) 0.5 Vp-p or
more and the
diffraction lattice is
correct with the
aforementioned
power.
Adjust the reading
of the 2 voltmeters
to the same
value.
Adjust the readings
of the 2 votrneters
to the same
value.
Adjustment of (b) focus gain and (c) tracking
gain.
FOCUS GAIN
The readings of the two
AC voltmeters should be
the same.
TRACKING
GAIN
The readings of the two
AC voltmeters should be
the same.
Focus Bias
RF Level LD Power
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