Onkyo DX 7711 Service Manual

Page 1

II-

ADJUSTMENTPROCEDURE

Instrument required
Oscilloscope. Test disc (SONY YEDS-18),Jitter meter and AC voltmeter.

1. Slide Balance Adjustment
1. Connect the audio oscillator between the P155 sensor output and GND as shown bellow. (Ch.1)
2. Turn on the switch of set. (Wait for a moment still focus serch finished.)
3. Adjust the semi-fixed resistor R174 (pushing the $101) so that the waveform on the oscilloscope
becomes 0V.
(After checking the pickup go back to innermost positon.)

l

8101

PUSH
(When Slide Balance Adjustment)

CH1 : 0.1 mv/div
l0:i Prob: CH2 : 0.1mVIdiv

(II I C 2
()SCILU)SLOP[£

2. Slide Offset Adjustment
1. Connect the audio oscillator between P155 SLD output and GND.
2. Turn on the switch of set. (Wait for a moment still focus serch finished.)
3. Adjust the semi-fixed resistor R175 so that the waveform on the oscilloscope becomes 0V.
(Check the GND positon of audio oscillator.)

3. confirmation of Jitter
1. Connect the jitter meter to P155, and confirm the jitter value is less than 14nSec.

4. Auto Adjustment

1. If you push the [UP] button and [DISPLAY] button together when the power switch turns ON,

2. Insert the disc and closed by [OPEN/CLOSE] button, the disc will read in and autoadjustmen will start.
you can enter to the Test mode.
When the autoadjustmen finished, disc's information will displayed.
At times error message (Er Fg. Er Fe) will displayed. but it is not bud condition.
Push the [OPEN/CLOSE] button and [DIGITAL OUT] button togther When the power ON no disc condition,
you will cancel the test mode.

-17_

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-13-

DX-771 1