IBM 3274 51C Maintenance Information page 176

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n.
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F E
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C B A
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Q
N M
L K
J I
0
•
•
.
~
P
Card PN 8564561 (Early-Production Machines)
1 2 3
4
5 6
• r \
r.
•
.
~
C
• •
• •
V
.
"-"
7
t
8
9 10 11 12
Note 2
Card PN 5864683 (Later Production Machines)
Notes:
1. Use jumper PN 2731801.
2. Place jumper from C to position 7 for HPCA.
Place jumper from C to position 8 for CCA.
Figure C-IS. X.21 Nonswitched Adapter Card Jumpering
1 2
.
.-.
v ·
7 8
3 4
.....
.
r-. •
9 10
Card PN 5687968 or 5864683
Notes:
1. Use jumperPN 2731801.
5 6
...
v ·
11 12
2. Always jumper card as shown for switched or nonswitched
operation.
Figure C-16. X.21 Switched or Nonswitched Adapter Card Jumpering
A
•
Com C
:-'
B
F
Com E
~
.
•
o
Notes:
1. Position A, D. Manufacturing test jumpers. Removed for field
operations.
2. Position 8. Storage position for card wrap jumper. It should
not be used on 3274.
3. Position C. Install for wrap on card.
4. Position E. 3274 diagnostic test mode. Removed for field
operations.
5. Position F. Modem mode. C/~ck supplied by DCE. Jumper
(PN 2731801) must be installed.
Figure C-l7. V.35 Card No. 14 Jumpering
Appendix C. Connector, Board, and Card Locations C-13