IBM 3274 51C Maintenance Information page 171

~
1<-_------'1
~apacitor
J
•••••• eo
Row B
Line Plate
B
10
e
C)
•
•
TB1 •
•
8
• •
•
Ringing
~I
G
Simulation
~
H
Strap H is mandatory
GreenlYeliow Wire
(Frame Ground)
o eeeeooo
RowA
-$
-
~
Line Plate
: ---- t--------------------------...I
Mounting Holes (2)
I
2 x B-Pin Connector
Note:
Line plate PN 2682397 replaces PN 1734234.
Figure C-9. Line Plate Automatic Adjustment
0 0
0
1
0
0
0 0 0
1
0 0
0 0
0
1
0
0
Data
I
C .
I
arner
Select
Select
o
0
o
0
o
0
Mode
Select
*
0 Beacon
o
Mode
Note: Install jumper PN 1675209 (7 required) to select carrier
speed and mode using chart below_ Speed selected must match
the speed of service provided by the loop controller.
Data/Carrier
Beacon
Mode
Carrier
Select
*
Select
Speed
: ! ! : i
• •
•
1 1
9.6K bps
•
: ! : i :
• •
•
I I
38.4K bps
•
*Beacon mode is on card PN 8548788.
Figure C-IO. Loop Card Jumpering (Card No. 14) (PN 2399082
and 8548788)
C-B
B
D E
C
G F
Notes:
1. Positions Band C are for card test purposes and should be
removed.
2. Position D enables wrap at VTL interface (not used
011
the
3274 Models 51C, 52C).
3. Position E is spare .
4. Positions F and G should not be jumpered for 3274 Models
51Cand 52C.
Figure C-Il. EIA/CeITT C.ud Jumpering (Card No. 14)
(PN 5864660,5864668)