Packet and serial bus maintenance
S8100 packet bus fault isolation and repair
258
Maintenance Procedures
December 2003
Figure 76: Packet bus leads on the backplane (back)
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:
+5v
LP
L2
L4
L7
L8
H0
SB
H2
H4
SF
H6
H7
H8
GND
SS
GND
GND
+5v
+5v
+5v
+5v
+5v
L5
L1
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GND
L3
GND
L6
GND
HP
H1
GND
H3
GND
H5
GND
LF
GND
GND
GND
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SLOT XXX
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L0
Backplane
Separation
Summary of Contents for CMC1
Page 1: ...Maintenance Procedures 555 245 103 Issue 1 1 December 2003 ...
Page 14: ...Contents 14 Maintenance Procedures December 2003 ...
Page 416: ...Additional maintenance procedures IP Telephones 416 Maintenance Procedures December 2003 ...
Page 426: ...Index X 426 Maintenance Procedures December 2003 ...