IBM 3274 51C Maintenance Information page 138

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~
t-J
Pin
Row
Legend,
Probe Pin
Card Column
Card Column
/
Pin Column
I
Pin Column
Example for "Y2" Connector
Cable
Designation
goes to
Pin
Designation
v
u
T
5
R
Q
p
N
M /
L
K
J
H
G
F
E
o
c
B
A
Card Row
602
002
DIE 13
DIE 11
G 1 A 13
G 1 A 11
1
ri m
l
H1lll
~ j
111 j
j j
j lln
j j
~
1
~ j
li
j
III jl
fIr
j
1
j
11
j
j
11
j
lln
1
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a
D
BAEOCBAEOCBAEOCB
,
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613
013
Example for
"n"
Connector
Cable
Designation
B02
002
B13
013
goes
to
004
0
o
B04
005
0
o
B05
006
0
o
B06
007
0
o
B07
008
o
0
B08
009
0
o
B09
0
o
Bl0
0
o
Bll
0
o
B12
Pin
Designation
o
6 E 04
o
6 E 02
G 6 A 04
G 6 A 02
DDDIi
Gate
Board
I I I I
Card Column
} Socket Location
~~
Example:
I
Card Row
Generally
I
Pin Column
} Called Pin
I
r
Row
Number
NotH'
I. For multipl_socket carris (such a, carris G2, E4, 03,
and C2 in
illultf.tion}1 am
location designation
if
rpecified by the uppermost row. Example: The
location of carrl G2 (which actually occupie, four
,ockett! i, rpecified by the uppermost row, G2. If
rhiscarrJ is located
on
board A I,
its
l0C6tion if
identified a. A IG2.
2. Pin-column lerrer designation ••
IW
signified by card
size (f3ther than vertical position of card on
boardJ~
b~inning
with 08, in the first pin row used.
Subsequent designations
BNI
JG~ PM~
and US.
which~
when required, rpecify pin columns in the second,
third, and fourth card row.
resp«ti~ely.
5H
examples in the illustration.
3.
Ground- any DOB. JOB, or UOB pin: identified by a
lquartlsulTOunding each ground pin. (The
sqlUre
is
not shown.!
+5-
.ny 003, J03, P03. or U03 pin.
4. Cards
aNI
shown fo, instruction
purpOIll1S
only.
Sell
Figuffls
'·3, 1·4,
or A·I2 for actual carrl location ••
o
01
o
01
e
01
Al
M
2
B
09
Al
0
6
04
Al
0
E
11
"Z2" Pin
Designation
"Y2" Pin
Designation
Figure A-I. Logic Board-Card, Connector, and Pin Locations

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