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WAVEFORMS & VOLTAGES
On the CRT Board
IC711
1
3.3V
2
12.2V
IC721
1
3.3V
2
12.1V
IC731
1
3.3V
2
12.1V
Q711
Q721
E
3.6V
E
3.6V
C
0V
C
0V
B
3.0V
B
3.0V
TP47G
<Video out G>
<Video out B>
10 µ s/div.
50V/div.
50V/div.
DC=0V
TPIK
<IK pulse>
10 µ s/div.
2V/div.
On the Front Board
Q681
Q682
E
5.1V
E
5.0V
C
15.3V
C
5.1V
B
5.8V
B
5.6V
On the Main Board(1)
IC001
1
1.6V
2
0V
10
0V
11
5.0V
IC101
1
11.1V
2
5.7V
10
9.0V
11
4.1V
19
4.7V
20
5.3V
IC201
1
8.1V
2
2.3V
10
2.3V
11
2.2V
3
3.3V
4
0V
3
3.3V
4
0V
3
3.3V
4
0V
Q731
E
3.7V
C
0V
B
3.1V
TP47B
TP47R
<Video out R>
10 µ s/div.
50V/div.
DC=0V
Q1111
Q1121
E
4.5V
E
4.5V
C
12.2V
C
12.2V
B
5.1V
B
5.1V
3
0V
4
0V
12
12.7V
3
6.8V
4
4.6V
12
4.2V
13
6.8V
21
5.3V
22
10.1V
3
2.3V
4
2.4V
12
2.2V
13
0.7V
5
6.4V
6
210V
5
6.4V
6
210V
5
6.5V
6
210V
K7D-5
<G drive>
10 µ s/div.
10 µ s/div.
1V/div.
DC=0V
DC=0V
Q1131
E
4.5V
C
12.2V
B
5.1V
5
1.5V
6
9.4V
5
4.7V
6
4.6V
14
7.0V
15
11.2V
23
5.1V
24
2.0V
5
4.1V
6
3.8V
14
1.0V
15
-22-
7
138V
8
7
141V
8
7
135V
8
K7D-6
<B drive>
10 µ s/div.
1V/div.
DC=0V
7
13.2V
8
7
0V
8
16
11.3V
17
7
2.3V
8
0V
16
0.4V
138V
9
137V
142V
9
140V
136V
9
134V
K7D-4
<R drive>
10 µ s/div.
50V/div.
DC=0V
5.0V
9
27.7V
3.7V
9
12.1V
4.6V
18
5.3V
5.1V
9
0V
Service Manual EH1 chassis
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