Electrical Adjustment; Focus Bias Check - Sony D-E01 Service Manual

CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.

4-1. FOCUS BIAS CHECK

1. Connect the oscilloscope between TP614 (RF) or TP601 (RF)
and GND on main 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 the
center of the waveform can be clearly distinguished.
• RF signal reference waveform (eye pattern)
VOLT/DIV : 100 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 Points:
– main board (side A) –
TP601
(RF)
SECTION 4
ELECTRICAL ADJUSTMENTS
RF level :
0.5 ± 0.15 Vp-p
– 8 –
– main board (side B) –
TP614
(RF)