Avaya MCC1 Maintenance Procedures page 258

Packet and serial bus maintenance
S8100 packet bus fault isolation and repair
Figure 76: Packet bus leads on the backplane (back)
Backplane
Separation
Special precaution concerning the TN771
NOTE:
A new TN771 Maintenance/Test circuit pack must be taken to the customer site whenever
the following is true:
258
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
. . . .
. . . .
. . . .
. . . .
. . . .
. . . .
Maintenance Procedures
December 2003