Electrical Adjustments - Sony CFD-RG880CP Service Manual

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Operating instructions (2 pages)

Operating instructions (2 pages)

Service manual (15 pages)

Table Of Contents

Table of Contents

CD SECTION

CD section adjustments are done automatically in this set.

In case of operation check, conﬁ rm that focus bias.

FOCUS BIAS CHECK

1. Connect the oscilloscope between IC701 pin 2 and pin qa (or

TP (RF OUT) and TP (VC)).

2. Insert the disc (PATD-012 (Tr 15)). (Part No. : 4-225-203-01)

3. Press the [

] (CD) button.

N X

4. Conﬁ rm that the oscilloscope waveform is as shown in the ﬁ g-

ure below. (eye pattern)

A good eye pattern means that the diamond shape (

center of the waveform can be clearly distinguished.

• RF signal reference waveform (eye pattern)

VOLT/DIV : 50 mV (10 : 1 probe in use)

TIME/DIV : 500 nS

When observing the eye pattern, set the oscilloscope for AC range

and raise vertical sensitivity.

Test Point:

– CD BOARD (Conductor Side) –

TP (RF OUT)

SECTION 6