IBM System/360 2050 Maintenance Manual page 135

Front
••• A
••• e(Q)
••• c
~D
ABCD EFGH ABCD EFGH
r ....
EC2 • • • •
.
.
. .
From To
Rl-1 R4-1
R3-1 R6-1
R6-1
RB-1
R8-1 R12-1
R12-1
R15-1
R15-1 R18-1
R18-1 R21-1
Rl-3 R2-2
R4-2
R3-3
R6-3 R7-2
R8-3
R9-2
R9-1 Rl0-1
.... ....
.
...
From
R12-2
Rll-1
R15-2
R14-1
R18-2
R17-1
R21-2
R20-1
Rll-2
R16-2
K38-1
K38-4
I ····
. ... . .
.
.
. .. · 1
• • • • EC3
.
...
JUMPER CHART
To
From
Rll-3
R14-2
R13-1 R19-2
R14-3 R17-2
R16-1 R22-2
R17-3
R20-2
R19-1 R13-2
R20-3 EC2-2
R22-1 EC2-b
K38-7 EC2-c
K38-8 EC2-d
ECl-6 EC2-e
ECl-d EC2-f
FIGURE 126. VOLTAGE DIVIDER ASSEMBLY
To From
To
K38-10 EC2-g
RB-2
K38-11
EC2-h Rl0-2
K38-13 EC3-a
K38-6
K38-14
EC3-b R13-2
K38-16 EC3-c K38-9
K38-5
EC3-d R16-2
Rl-2 EC3-e
K38-12
R2-1
EC3-f R19-2
R3-2 EC3-g
K38-15
RS-2
EC3-h R22-2
R6-2 ECl-c
R12-1
R7-1
R3-1 RS-1
Channels
2 3
4 5 6
+6 under110ltage setting should
be
adju•ted •o that reloy is
de-energized---+:~~~~
when the +6 volt •upply is at
5.
2vdc. R 12 center arm should
be
oet for
approximately
5.
3vdc from center arm of potentiometer to common ca
1
2
+6
1
1
2
+6
2
1 1 1
+6
2
+6
2
+6
2
+6
measured with a 3 percent 20K 110ltmeter.
For +3 volt overvoltoge •etting, odjust R4 for aver110ltage trip setting an
+3 volt •upplies. R4 center arm should
be
set for +4.5vdc from center arm
of potentiometer to common as measured with a 3 percent 20K voltmeter.
For -3 volt overvoltage setting, adjust R7 for overvoltage trip setting on
-3 110lt supplies. R7 center arm should
be
set for -4.Svdc from center arm
af potentiometer to common as memured with a 3 percent 20K voltmeter.
For +6 volt overvoltage setting, adjust R9 for overvoltoge trip setting on
+6 volt supplies. R9 center arm should
be
set for +9.5vdc from center
arm of potentiometer to common
as
mecnured with a
3
percent 20K volt-
meter.
FIGURE 127. OVERVOLTAGE A5SEMILY
134 (3/71) Model 50 FEMM
Note:
3 3 3 3 3 3
4 4 4 4 4 4
rn~m~ m~m~ m~m~
rn4m4~4
1 1
1
1 1
2 2
-3
2
-3
2
-3
2
-3
3 UV
3 3
3
3
4 4 4 4
D51 and D52 removed by EC 259862
7
1
2
+6
3
4
1
2
-3
3