Control Storage Card Layouts - IBM 3274 51C Maintenance Information

1 Module for
each storage
position.
2 Modules
(stacked) for
each position.
2 Modules
(stacked) for
each position.
GGGBBB86G 0
E
STORAGE MODULES "XX"
=-f
lGG8G88BB
0
000
Control Storage Card 32K (Card No.1)
GGGBBBBB80
~
STORAGE MODULES
"XX"
::1
188GGBBBB
0
ODD
Control Storage Card 64K (Card No.2)
Control Storage Card 64K·(R) (Card No.3)
·When XX
=
9 or 18, the failing module could be either number 9 or 18.
Figure 2-5. Control Storage Card Layouts
Chapter 2. Subsystem Problem Isolation Procedure 2-7