Denon DCD-1500 Service Manual page 18

{6) Adjustment of Focus Gain
With a sufficient interval of time in between, push
play button ( > PLAY) twice. to activate tracking
servo and spindle servo.
@ Plug in the headphone and make sure the playback
sound is heard prior to the adjustment.
@® Connect of measuring equipment ..
Connect the measuring equipments as per illustra-
tion.
Note: Before connecting the oscillator check the
x Operation of servo (produce sound),
Oscilloscope -
Pin) of TP-101 ©
FEOX
ay
Pin @ ot TP-101 O
FEIN
Pin © of TP-101 ©
Set to 1.1 kHz, 1.5Vp-p
Audio -
| a | Oscillator
"FEO: Focus Error Out
FEI: Focus Error In
Frequency Counter
@ Adjustment
'@ Set the output of audio oscillator to 1.1 kHz,
1.5 Vp-p (40.1 V}.
Prepare and connect two filters as per illustra-
® Adjust VR-103 and obtain Lissajous figure
symmetirc to X and Y axes. (Adjust the phase
of two inputs to 90°.)
i Yaxis *.- Y axis ae
Correct figure