Onkyo DX-C300 - Page 17

5. Tracking Offset Adjustment
Load the test disc YEDS-18 on the tray and play the
track 2. Turn R132 to minimum position. (Counter
clockwise)
Connect the oscilloscope between pin 3 (TR) of P107
and pin 2 (GND) of P106.
Adjust R108 until the center of tracking error signal
on the oscilloscope becomes GND level.
Turn R132 to the mechanical center.
After adjustment, disconnect the oscilloscope.
P1o7 | 1
2
A
TR
3
Oscilloscope
GND level 4
B
A=B
P106
1
Vertical
:
1Vidiv.
Holizontal : 2ms/div.
eNO) [Re DC, Ground Center
Photo 3
6. Focus Gain Adjustment
Set the output of AF signal generator to 800Hz,
1-~1.5Vp-p.
Play the track 2 of test disc.
Connect the oscilloscope and the AF signal generator
as shown below.
AF _ signal Oscilloscope
generator
GND CH1 CH2
P107
GND
7 Vertical : 0.5V/div
Adjust R122 until 800Hz components of channels 1 Holizontal : 0.5ms/div
and 2 on oscilloscope become same level.
After adjustment, disconnect the AF signal generator
and the oscilloscope.
7. Tracking Gain Adjustment
Set the output of AF signal generator to 1.2kHz, 1~1.5Vp-p.
Play the track 2 of test disc.
Connect the oscilloscope and the AF signal generator AF signal
oscillator as shown below. 2 Oscilloscope
generator
GND CH 1 -_ 2
$ :
A
F a |
T
P107 —| P106
® ®@ ® ® GND
B
Vertical : 1V/div.
Photo 5 Holizontal: 0.5 ms/div.