Dell P780 - 17" CRT Display Service Manual page 41

A BOARD SCHEMATIC DIAGRAM (3 of 3)
35 36 37 38
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A
B
 
-
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5&9 

C
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D
 
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N
 
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6*
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9
5
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5
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9
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9
R
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9
5
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S
5
N
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T
U
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V
W
A BOARD IC VOLTAGE LIST
X
IC001 10 3.0 21
pin volt 11 2.0 22
1 4.0 12 0.2 23
Y
2 4.6 13 0 24
3 3.0 14 0 25
4 2.6 15 0 26
Z
5 2.6 16 11.9 27
6 3.2 17 0 28
7 2.0 18 0.9 29
8 4.8 19 GND 30
9 2.0 20 2.2
39 40 41 42
| | | |
5&9
+
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5
&1
0
3
:
51
 .9
72 ' %2$5'
6*
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3
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3
72 &57
5
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9

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 9
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9
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9

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9

%69 3$
3.3 IC002 9
11.9 pin volt 10
GND 1 50.5 11
2.1 2 GND IC003
3.3 3 49.8 pin
GND 4 GND 1
2.3 5 49.7 2
3.3 6 78.7 3
11.9 7 GND 4
2.6 8 2.1 5
43 44 45 46
| | | |
9 
3,&785(
78%(
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+9
72
72
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&1
&1
&1
A BOARD WAVEFORMS
2
1
1.1 Vp-p (H)
4 5
4.1 Vp-p (H)
7 8
59.3 Vp-p (H)
11
10
54.0 Vp-p (H)
A BOARD TRANSITOR
VOLTAGE LIST
B
Q001 11.4
Q006 0.3
2.1 6 5.0 IC004
11.8 7 4.1 pin
2.2 8 4.6 1
9 5.0 2
volt 10 0 3
0.5 11 NC 4
1.1 12 0 5
1.1 13 0 6
5.0 14 0 7
3.6 15 0 8
16 GND 9
— 5 —
47 48 49 50
| | | |
3
1.1 Vp-p (H)
1.2 Vp-p (H)
6
4.0 Vp-p (H) 4.6 Vp-p (H)
9
56.5 Vp-p (H) 58.7 Vp-p (H)
12
52.2 Vp-p (H)
54.0 Vp-p (H)
C E
505 10.9
3.6 GND
All voltages are in V
10 NC 7
volt 11 178.4 8
GND IC005 IC006
11.9 pin volt pin
4.8 1 NC 1
4.8 2 NC 2
4.8 3 NC 3
NC 4 GND 4
93.7 5 3.2 5
94.0 6 3.0
101.8
P780
51 52
| | |
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
10.4 6 4.6
11.6 7 GND
8 0.3
Y
volt 9 0.3
NC 10 4.6
0 11 GND
Z
0 12 GND
0.5 13 NC
4.6 14 4.9
All voltages in V