Schematic Diagrams
8
8-9
1 8 0 P F
C 1 0
R 1 5
3 3
M M B T 3 9 0 4
Q 5
R 1 4
1 0 K
1 8 0 P F
C 9
R 1 3
2 0
R11
4 7 K
R 9
4.7K
R 5
1.00K
R 6
3.32K
H C U 0 4
H C U 0 4
D
H C 7 4
CL
Q
Q
P R
TP1
T P 3 0
C R 6
M B R 1 4 0
C R 2
1 N 5 3 9 7
C R 5
M B R 1 4 0
1 0
C 6
C R 3
1 N 5 3 9 7
1 0 0 0 0
C 7
.033
C 2
2 6 2 0 A - 6 5 0 1
J3
E G
N
L
1/8A SB
1 8 0 P F
C 5 9
J2
P 1 0
RT1
R X E 0 6 5
C 3 9
.047
R 4 8
1 0 K
1.0
C 3 4
4.02K
R 4 6
1.30K
R 4 4
11.0K
R 1 9
R 2 0
59.0K
V C C
T P 2
T P 6
T P 5
T P 3
T P 4
T P 3 2
T P 7
TP10
T P 9
TP14
TP31
S1
V R 2
1 N 5 2 3 3
1 N 5 2 3 5 B
V R 3
VR1
1 N 5 2 3 2
1.0
C 5
T1
U 2 8
L M 3 5 8 D T
G N D
V C
VIN
V S W
F B
U 9
LT1170
U 2 8
L M 3 5 8 D T
M B R D 3 6 0
C R 1 0
2 2 0
C 1 8
M B R D 3 6 0
C R 1
2 2 0
C 1
A
M H 1
45.3K
R 3 0
11.0K
R 3 1
4 7
C 2 6
C R 1 3
M M B D 7 0 0 0
1 0 0
R 2 6
0.1
C 2 1
Q 4
M M B T 3 9 0 4
Q 2
M M B T 3 9 0 6
M M B T 3 9 0 4
Q 6
Q 8
IRL024
Q 7
IRL024
R 3 8
0.02
4 7
C 3 0
4 7
C 3 1
2 2 0 0
C 1 4
F L U K E 4 5 - 6 4 0 1
T2
L M 3 1 7 T
U 6
IN
O U T
A D J
C R 1 2
B A S 1 6
D
H C 7 4
CL
Q
Q
P R
R 4 7
1 0 K
1 0 0 0 P F
C 3 5
U 1 8
L M 7 9 L 0 5 A
G N D
O U T
IN
H C U 0 4
H C U 0 4
H C U 0 4
H C U 0 4
C R 1 1
B A S 1 6
R 2 8
4 7 0
R 3 4
4 7 0
R 4 0
5.1K
M M B D 7 0 0 0
C R 9
C R 8
M M B D 7 0 0 0
L M 3 1 7 L
U 1 9
IN
O U T
A D J
4 7 K
R 2 2
2.2
C 1 7
1.0
C 3 2
V C C
Q 1
M M B T 3 9 0 6
B A S 1 6
C R 4
4 7 0
C 1 3
4 7 0
C 1 2
C R 7
B A W 5 6
1.0
C 4
M M B T 3 9 0 6
Q 3
R 4
1 0 K
R 1 2
4 7 K
R 1 0
4.7K
SHEET 5
SHEET 4
O F F
NOTE: U22 AND U23 ARE BIASED BY IBIAS
A/D SUPPLIES
5 V A C
DISPLAY SUPPLIES
2
3
1
4
8
6
5
7
4
8
100V
1/4W
V L O A D
V E E
FIL2
FIL1
V E E
4
8
7
6
1
3
2
U 2 2
8
9
1 0
11
1 2
1 3
6
5
4
3
2
1
U 2 2
U 2 3
1 2
1 3
U 2 3
1 0
11
1/4W
1
1
5 0 V
RI
5 0 V
RI
1 2
11
1 0
8
7
6
5
4
3
2
1
5 0 V
5 0 V
U 2 3
U 2 3
U 2 3
U 2 3
IBIAS
D C L
9
8
6
5
4
3
2
1
D C H
V P F
1 %
1 %
1 %
100V
1
2
3
5 0 V
3 5 V
3 5 V
16V
16V
V D D R
5 0 V
V D D
7
6
9
4
5
6 3 V
1 %
1 %
1
1 0
8
S H L D
R C O M
5 0 V
V S S
1 %
10V
9
2
7
4
5 0 V
1 %
5
4
3
2
1
2 5 V
3 5 V
1 %
2635A-1001
(1 of 5)
Figure 8-2. A1 Main PCA (2635A) (cont)
s75f.eps
Summary of Contents for 2620A
Page 4: ......
Page 18: ...HYDRA Service Manual 1 2...
Page 48: ...HYDRA Service Manual 1 32...
Page 140: ...HYDRA Service Manual 3 16...
Page 234: ...HYDRA Service Manual 5A 34...
Page 236: ...HYDRA Service Manual 6 2...
Page 254: ...HYDRA Service Manual 6 20 2620A 1601 s63f eps Figure 6 3 2620A 2625A A1 Main PCA...
Page 258: ...HYDRA Service Manual 6 24 2635A 1601 s64f eps Figure 6 4 2635A A1 Main PCA...
Page 260: ...HYDRA Service Manual 6 26 2620A 4002 CKT 1 CKT 2 s65f eps Figure 6 5 A2 Display PCA...
Page 272: ...HYDRA Service Manual 6 38...
Page 274: ...HYDRA Service Manual 7 2...
Page 282: ...HYDRA Service Manual 7 10...
Page 284: ...HYDRA Service Manual 8 2...
Page 285: ...Schematic Diagrams 8 8 3 Figure 8 1 A1 Main PCA 2620A 2625A 2620A 1601 s88f eps...
Page 288: ...Schematic Diagrams 8 8 6 Figure 8 1 A1 Main PCA 2620A 2625A cont 2620A 1001 3 of 4 s73f eps...
Page 292: ...Schematic Diagrams 8 8 10 2635A 1001 2 of 5 Figure 8 2 A1 Main PCA 2635A cont s76f eps...
Page 293: ...Schematic Diagrams 8 8 11 2635A 1001 3 of 5 Figure 8 2 A1 Main PCA 2635A cont s77f eps...
Page 296: ...Schematic Diagrams 8 8 14 2620A 4002 CKT 1 CKT 2 Figure 8 3 A2 Display PCA s90f eps...
Page 300: ...Schematic Diagrams 8 8 18 2620A 1003 2 of 3 Figure 8 4 A3 A D Converter PCA cont s82c eps...
Page 301: ...Schematic Diagrams 8 8 19 2620A 1003 3 of 3 Figure 8 4 A3 A D Converter PCA cont s83c eps...
Page 302: ...Schematic Diagrams 8 8 20 2620A 1604 Figure 8 5 A4 Analog Input PCA s92f eps...
Page 304: ...Schematic Diagrams 8 8 22 2620A 1605 Figure 8 6 A5 IEEE 488 Interface PCA 2620A Only s93f eps...
Page 306: ...Schematic Diagrams 8 8 24 2625A 1606 Figure 8 7 A6 Memory PCA 2625A s94f eps...
Page 310: ...Schematic Diagrams 8 8 28...
