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ZS-Y3

CD SECTION

CD section adjustments are done automatically in this set.

In case of operation check, confirm that focus bias.

Focus Bias Check

1. Connect a oscilloscope to TP (RF) and TP (GND) on the CD

board.

2. Insert the disc (YEDS-18). (Part No.: 3-702-101-01)

3. Press the

button.

4. Confirm that the oscilloscope waveform is as shown in the

figure below. (eye pattern)

A good eye pattern means that the diamond shape (◊) in

thecenter of the waveform can be clearly distinguished.

RF Signal Reference Waveform (Eye Pattern)

VOLT/DIV: 0.2 V (with the 10: 1 probe in use.)

TIME/DIV: 500 ns

When observing the eye pattern, set the oscilloscope

for AC range and raise vertical sensitivity.

Checking Location:

– CD BOARD (Conductor Side) –

IC701

TP (GND)

0.65 to 1.05 Vp-p

(RF)