Onkyo DX-C201 User Manual

(4) FOCUS GAIN ADJUSTMENT
1. Set up the AF oscillator output for 825Hz, 150 mVp-p,
and connect it to pins 3 and 4 of adjusting fixture CN102
on the servo pc board.
2. Connect oscilloscope’s CH. 1 and CH. 2 probes to the
pins 3 and 4 of CN102, respectively (Pin 5 is GND).
Oscilloscope setting: VOLT 00... cesses 100 mV
coupling .......... AC
3. Play the track 2 on the test disc (YEDS-18).
4, Adjust VR104 until the signal amplitudes on both
channels become identical to each other.
(5) TRACKING GAIN ADJUSTMENT
1. Set up the AF oscillator output for 1.1kHz, 150 mVp-p
and connectitto pins 1 and 2 of adjusting fixture CN102.
2. Connect oscilloscope’s CH. 1 and CH. 2 probes to the
Pins 1 and 2, respectively (Pin 5 is GND).
Oscilloscope setting: VOLT ................ 100 mV
(both channels)
SWEEP ............. 0.2 ms.
Input
coupling ........... AC
3. Switch the player power ON, and play the track 2 on
the test disc (YEDS-18).
4. Adjust VR102 until the signal amplitudes on both
channels become identical to each other.
(6) FOCUS OFFSET ADJUSTMENT
1. Connect the oscilloscope’s CH. 1 probe across
(+) (—) on the Servo P.C.B. and its CH. 2 probe
(+) to VR104’s terminal.
Oscilloscope setting: VOLT ................ 100 mV (CH. 1)
100 mV (CH. 2)
SWEEP ............: 0.2 ms.
Input
coupling ww AC
Trigger mode .. NORM
(trigger CH. 1)
2. Switch the player power ON, and play track 13 on the
test disc (NR5A).
3. Trigger the oscilloscope’s CH. 1 so that the following
waveforms are observed. Adjust VR105 until the dip in
the RF signal envelope on CH.1 is smooth and the
signal amplitude on CH.2 is minimized, i.e. when
amplitude A equals amplitude B.
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Minimize the amplitude or make A = B.
Smooth
envelope

Onkyo DX-C201 Specifications

General

Brand	Onkyo
Model	DX-C201
Category	CD Player
Language	English