Denon UCD-250 - OFFSET ADJUSTMENT PROCEDURES; Tracking Offset Adjustment; Focus Offset Adjustment

(3) Tracking offset adjustment
Wiring Diagram
Oscilloscope
(DC range)
ere
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IVR6O! VR6EO2
MAIN UNIT
1U-2478-1
FRONT PANEL SIDE
Adjustment
location
(Control)
Check items
DC Voltmenter
Oscilloscope
Adjustment procedure
1. | “ OPEN/CLOSE | Press the OPEN/CLOSE button and
place an adjustment disc in the disc holder.
2.| “OPEN/CLOSE | Press the OPEN/CLOSE button again
and close the disc holder.
3.| ® PLAY | Press the PLAY button and check that the display
indicates “O2 ”.
4. Short circuit the (+) and (—) terminals of the oscilloscope
and check the board wiring.
5. Adjust the VR501 “T-OFFSET” control and set the upper
and lower amplitude of the waveform to be equal.
D-250
CD PLAYER SECTION
(4) Focus offset Adjustment
Wiring diagram
YRGO!I VREO2
Oscilloscope
MAIN UNIT Oscilloscope
1U-2478-1 (or Digital Voltmeter)
(Input impedance :
more than 1Mohm)
VR502
Side terminal (FEO)
FRONT PANEL SIDE
Adjustment
;
location
Check
items
50mV/div
or
20mV/div
Adjustment Procedure
1. Press the | BESTOP | button.
2. Adjust VR502 “F. OFFSET” and set the FEO voltage to +70 mV (+10 mV).
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