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6.1 KEYSTEM NUMBERING
Figure 6-1 shows the numbers assigned to each keystem.
Reference between these numbers and the numbers found
in the keyboard location chart on the wiring diagram
(00.29.10.0) identify the
characters assigned to the
keystem.
6.2 REED-RELAY CARD
The relay card is 9 inches by 20 inches. There are six
connector tabs with 30 connections on each tab. The front
of the card is the componentside and this is divided into 36
blocks. Each block is capable of accommodating up to one
6-position reed relay or 10 components. The top of the
card is the edge with the connector tabs (Figure 6-2, view
A).
Chapter 6. Locations
All references to the card are made while viewing the
front of the card with the connector tabs up.
The connector tabs are labeled A through F, from left to
right (Figure 6-2, view A). The 30 connections on each tab
are separated into 15 connections on the front and 15
connections on the back. The front connections are labeled
1, 3, and 5 through 29 (odd numbers). The back con-
nectionsare labeled 2, 4, and 6 through 30 (even numbers).
A typical connection would be 1C07. This is card 1,
connector tab C, and connection 07. The block is the
main-component location factor. Blocksare labeled (left to
right and top to bottom) with block 01 in the upper
left-hand corner and block 36 in the lower right-hand
corner (Figure 6-2, view A). The full designation of a block
is 101, 102, etc. The high-order digit represents the card
number; when two cards are in the machine, the block is
O
9
0
9
O
Oo
0
9
0
O
O
Oo
O02
O
QQ
Vigure 6-1. Combination and Numeric Keystem Numbering
Refer to Wiring Diagram for Characters By Stems.
29FEMM~
(4/69)
6-1
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