Sony CFD-980 - Page 20

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• Good Example
• Incorrent Examples (DC level changes more than on adjusted
waveform)
5. Connect the oscilloscope between TP (TE) and TP (VC).
6. Insert disc (YEDS-18) and press the CD ^ button.
7. Adjust RV704 so that the waveform is as shown in the figure
below. (tracking gain adjustment)
• Incorrect Examples (fundamental wave appears)
VOLT/DIV : 0.1
V
TIME/DIV : 2ms
0V
low focus gain
high focus gain
low tracking gain
high tracking gain
(high fandametial wave than for low gain)
25mV
0V
VOLT/DIV : 20m
V
TIME/DIV : 1ms
VOLT/DIV : 20m
V
TIME/DIV : 2ms
50mV
0V
VOLT/DIV : 100m
V
TIME/DIV : 2ms
10mV
0V
VOLT/DIV : 0.1
V
TIME/DIV : 2ms
0V
VOLT/DIV : 0.1
V
TIME/DIV : 2ms
0V
[MAIN BOARD] (Component side)
TP(TO)
TP(TO)
TP(FO)
TP(FO)
TP(VC)
TP(VC)
Osillloscope
(DC range)
+
–
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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