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The Maintenance/Test Circuit Pack (TN771D)
Backplane
Separation
Figure 9-4. Packet Bus Leads on the Backplane - Back View
555-233-123
SLOT XXX
. .
. .
. .
. .
+5v
+5v
. .
. .
. .
. .
LP
L0
.
.
.
.
L1
GND
.
.
.
.
L2
L3
.
.
.
.
L4
GND
.
.
.
.
L5
L6
.
.
.
.
L7
GND
.
.
.
.
L8
HP
. . .
. . .
. . .
. . .
H0
H1
SB
GND
H2
H3
. .
. .
. .
. .
H4
GND
SF
H5
.
.
.
.
H6
GND
. . .
. . .
. . .
. . .
H7
LF
H8
GND
.
.
.
.
GND
. .
. .
. .
. .
SS
GND
GND
.
.
.
.
GND
. .
. .
. .
. .
GND
+5v
+5v
+5v
+5v
.
.
.
.
.
. .
.
.
. .
.
.
. .
.
.
. .
.
.
. .
.
Issue 4 May 2002
9-17
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Troubleshooting
