Cd Section - Sony ICF-CD513 Service Manual

CD SECTION

CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
Focus Bias Check
Connection:
MAIN board
TP513 (RF)
TP568 (GND)
Procedure:
1. Connect the oscilloscope to TP513 (RF) and TP568 (GND) on
the MAIN board.
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the button.
u
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: 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.
Connecting Points: MAIN Board (See page 13)
oscilloscope
(AC range)
+
–
1.2 ± 0.2 Vp-p
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