N-Sw And N-Sw-Snbu, U.s. And Canada; Sw-Aa/Ma,'U.s. And Canada; N-Sw, Wt Except Canada - IBM 3274 51C Maintenance Information

Appendix C. Connector, Board, and Card Locations
This appendix provides diagrams for card switch settings,
card jumpering, and cables. It calls out in paragraph C.2
the diagrams that should be referred to when host
attachment problems occur.
C.1. Contents
Figure C-l.
Figure C-2.
Figure C-3.
Figure CA.
Figure C-5.
Figure C-6.
Figure C-?
Figure C-8.
Figure C-9.
Figure C-10.
Figure C-l1 .
Figure C-12.
Figure C-13.
Figure C-14.
l200-bps Integrated Modem Card (No. 14),
N-Sw and N-Sw-SNBU, U.S. and Canada C-2
1200-bps Integrated Modem Card (No. 14), N-
Sw and N-Sw-SNBU-AA, l!.S. and Canada C-3
120Q-bps Integrated Modem Card (No. 14),
SW-AA/MA, U.S. and Canada C-4
l200-bps Integrated Modem Card (No. 14),
N-Sw, WT except Canada C-4
l200-bps Integrated Modem Card (No. 14),
N-Sw-SNBU-AA, WT except Canada C-5
1200-bps Integrated Modem Card (No. 14),
Sw-AA, WT except Canada C-6
WTC 1200-bps Integrated Modem Transmit
Level Settings (Card No. 14) C-6
Line Plate Current Adjustment Procedure, WT
except Canada C-?
Line Plate Automatic Adjustment C-8
Loop Card Jumpering (Card No. 14) (PN
2399082 and 8548788) C-8
EIA/CCITT Card Jumpering (Card No. 14)
(PN 5864660, 5864668) C-8
DDS Adapter Card Jumpering (Card No. 14),
U.S. and Canada Only C-9
Type A Adapter Coaxial Panel Card and
Cable (2 Parts) C-10
Cable from the 0 I A-AI Board to
Diskette Drive File Control Card C-12
Figure C-15. X.21 Nonswitched Adapter Card
Jumpering C-13
Figure C-16. X.21 Switched or Nonswitched Adapter Card
Jumpering C-13
Figure C-I7. V.35 Card No. 14 Jumpering C-13
Figure C-18. Cable - Type B Coaxial Panel to Al
Board C-14
Figure C-19. Loop Station Connector (lSC) C-15
C.2 Host Attachment - Jumpers, Wiring, and
Adjustments
Host attachment problems may result if the following are
not jumpered, wired, or adjusted correctly:
1. Integrated Modem 1200 bps
• 1200-bps Card: switches, potentiometer (U.S.
and Canada). See Figures C-I through C-6.
• Operator Panel: switches. See Figures D-I
through D-6.
• Board Wiring (U.S. and Canada): Nonswitched
two-wire - G2G02 to G2G09, G2J05 to G2J13.
• Line Plate (World Trade): Jumpering. See Figure C-8.
2. EIA/CCITT
• Card: No jumpers required. See Figure C-II.
3. DDS Adapter
• Card: Jumpers. See Figure C-12.
• Operator Panel: Switches. See Figure D-l.
5. X.21 Switched and Nonswitched (leased)
• Card: Jumpers.
• Card: For jumpering, see Figures C-15 and C-16.
6. Encrypt/Decrypt
• Removal of card Al A2 or battery when power is
off destroys the master key (see paragraph 6.1.3).
7. V.35
• Card: Jumpers. See Figure C-17.
Appendix C. Connector, Board, and Card Locations C-I