Measuring Method And Waveforms - Denon DVD-3800 Service Manual

MEASURING METHOD AND WAVEFORMS

To check the waveforms on the Servo P.W.B., the GND ( ) probe of the oscilloscope to Vref point.
(Except for Inner SW, TRVSW)
* For ~ , connect the GND (−) probe to "GND".
&
NOTES
Measuring Disc: DVD/DVDT-S01 or TDV-520A
CD/TCD-784
(It is better to use wires for extending between the probe and test points.)
When watching the HF waveform, use the extending wire as short as possible.
When HF waveform is noisy or cannot discriminate the eye-pattern, replace the Traverse Unit after measuring the Iop.
~ points have the certain test points shown below.
1
8 5
1
9
56
05
32
17
17
2 4 7 14 15
14 1
28
15
1
4
60
41
40
61
21
80
1
1 20
24
40
1
Main P.W.B. Unit Foil Side
3 12
32 17
8
5
1 16
15 1
40
1
21
20 21
20
75 51
50
76
11
26
100
12
1 25
24
25
18 19
DVD-3800
17 7
18
6
1
28 40
29 39
10
13
11
6
8 14
1
7 1
16
1
48
37
36
20
85