EFJohnson 3000 SERIES - Manual (Page 32)

SYSTEM RACK
4-6
6. On the top Backplane board, the following measure-
ments should be referenced to ground (pins 9, 10, 41
or 42).
Center Pin of Ohms
J5 37.5
J6 37.5
J23 19.2
J24 19.2
NOTE: The four readings should be ±1 ohm from
the test specifications.
7. Test is completed.
Figure 4-1 2-SHELF 3000 SERIES SWITCH BACKPLANE CABLES
Figure 4-2 2-SHELF 3000 SERIES SWITCH SETUP
NIM SHELF
P33
SHELF 1
P33
SHELF 2
J1 J2
J26 J25 J4 J3
J24 J23 J6 J5
J103 J102 J101 J1
0
0
J1 J2
J26 J25 J4 J3
J24 J23 J6 J5
POWER SUPPLY
J22 J21 J20
J22 J21 J20
P
T
M
P
T
M
0 1 2 3 4 5 6 7 8 9 10 11
16 17 18 19 20 21 22 23 24 25 26 27
SHELF 1
SHELF 2
M
D
C
M
D
C
M
C
I
M
C
I
M
C
I
M
C
I
t
N
e
M
V
T
M
V
T
1 2
M
S
N
M
S
N
M
I
T
M
I
T
M
I
T
M
I
T
M
C
C
M
C
C
POWER SUPPLY
N
I
M
t
N
e
N
I
M
M
L
E
M
L
E
M
W
A
M
W
A
M
I
D
M
I
D