Table Of Contents - Northern Telecom BCS35 Replacement Manual

Contents
Circuit pack replacement
How to use this document 1-1
General information about circuit pack failures 1-1
Troubleshooting - no specific fault indicators 1-2
Changing processor modes 1-4
Central Processor Unit (CPU)
General description 2-1
Central processor unit LED display 2-2
Replacing CPU circuit pack 2-2
EPROM circuit pack
General description 3-1
Replacing EPROM integrated circuits 3-1
EPROM IC precautions 3-2
Memory expansion circuit pack
General description 4-1
Replacing the Memory Expansion circuit pack 4-1
Error Control II and Error Control II Jumper circuit packs
General description 5-1
Error control II circuit pack LED 5-1
Error control II circuit pack jumper LED 5-2
Replacement procedures 5-2
QSIO circuit pack
General description 6-1
Replacing QSIO circuit pack 6-2
56K Interface circuit pack
General description 7-1
Replacing the 56K Interface circuit pack 7-2
DISK Interface circuit pack
General description 8-1
Replacing the Disk Interface circuit pack 8-1
DPP Card Replacement Guide BCS35 and up
iii
1-1
2-1
3-1
4-1
5-1
6-1
7-1
8-1