Onkyo DX-C106 - Page 15

ADJUSTMENT PROCEDURES
It is not necessary to perform the adjustment of optical pickup.
REFERENCE
This confirmation should be made when replacing the optical pickup. Focus/Tracking Gain Adjustment
1). Connect the oscilloscope to test points RF and VC. Af ; , | ay
Osilloscope requency response analyzer 158 necessary in
DC range order to perform this adjustment exactly.
However, this gain has a margin, so even if it ts
slightly off, there is no problem. Therefore, do not
perform this adjustment.
Focus/tracking gain determines the pick-up follow-
Mechanism pcb up (vertical and horizontal) relative to mechanical
TP(RF) C3 C) noise aid mechanical shock when the 2-axis device
TP(VC) G CO) operate.
However, as these reciprocate, the adjustment is at
2). Turn the power switch on. .
the point where both are satisfied.
3). Load the test disc YEDS-18 on the tray and press the play button. —_ . | |
4). Confirm that the waveform on the oscilloscope is optimum eye @ When gain is raised, the noise when the 2-axis
; device operates increases.
pattern and optimum level as shown photo 1.
@ When gain is lowered, it is more susceptible to
Optimum eye pattern means that shape "<>" can be clearly a
mechanical shock and skipping occurs more easily.
distinguished at the center of the waveform.
@ When gain adjustment is off, the symptoms below
appear.
CHi 86 49445 . SIH ;
F
bee
. asin sad segete @ The time until music starts
‘oN - becomes longer for STOP
(yx I b —> DPLAY or automatic
KK CXF selection (Hed. PPA buttons
low or high
KAAAN ice yd AS, YOK pressed. (Normally takes
epee *.¢.8 about 2 seconds.)
e Music does not start and
disc continues to rotate
for STOP >PPLAY or
automatic selection ( Hed
bP i buttons pressed.)
e
Disc
table
opens
shortly
low
or
high
_
after
STOP
>DPLAY.
e Sound is interrupted dur-
ing PLAY. Or time count-
er display stops progress-
ing.
e More poise during 2-axis
device operation.
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