Read Sony ICF-CD523 Service Manual online
14
ICF-CD523
CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
In case of operation check, confirm that focus bias.
FOCUS BIAS CHECK
Connection:
Procedure:
1. Connect the oscilloscope to TP513 (RF) and TP568 (GND)
on the MAIN board.
2. Insert the CD test disc (PATD-012). (Part No. 4-225-203-01)
3. Press the CD u button.
4. Confirm that the oscilloscope waveform is as shown in the
3. Press the CD u 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.
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)
Connecting Location: MAIN Board (See page 15)
MAIN board
TP513 (RF)
TP568 (GND)
+
–
–
oscilloscope
(AC range)
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.)
TIME/DIV: 500 ns
TIME/DIV: 500 ns
1.2
±
0.3 Vp-p
When observing the eye pattern, set the oscilloscope
for AC range and raise vertical sensitivity.
for AC range and raise vertical sensitivity.
Click on the first or last page to see other ICF-CD523 service manuals if exist.