World Trade (60 Hz) - IBM 4975 02L Maintenance Information

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World Trade (60 Hz)
~-------------------
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AC power
TB1
SW1
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CB1
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TB2
10 9 8 7 6 5 4 3 2 1
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T1
1
11
2
3
12
4
t13
5
6
14
7 )
8
15
9
10
16
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17
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18
21
f19
TB2 Connections
Vac
Input Wires
Jumper
100
1,2
1-6,2-7
110
1,3
1-6,3-8
e
Connector J2
(plug side)
120
1,4
1-6,4-9
127
1,5
1-6,5-10
200
1,7
2-6
208
1,8
2-6
800@
0®@@
220
1,8
3-6
240
1,9
4-6
0®®@
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Connector P 1
(plug side)
Pin
Description
1 +5 Vdc
2
+24 Vdc
CD 0
(2]
0 0 0
3
+11 Vdc
4
+24 Vdc
5
+11 Vdc
(2) @
®
~
6
+11 Vdc
7
Common
Pin
Description
8
Common
1
Common
9
Common
2
Gommon
10
Common
3
Common
11
Frame ground
4
6.1 Vac
12
Common
5
12.3 Vac
6
25 Vac
7
6.1 Vac
8
12.3 Vac
9
25 Vac
o
e
.t$\JJ
V
F4
Fuse Supply
F2
24 Vdc
F3
11 Vdc
F4
5 Vdc
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o
is'VJ
F2
Rating
10A Med-Blo
8A Med-Blo
5A Sio-Blo
J1 (P1)
Voltage
Voltage
Ripple
supply
tolerance
tolerance
+5 Vdc
+4.6 to +5.5
.200
+11 Vdc
+10.12 to +12.1
.430
+24 Vdc
+22.08 to +26.4
.960
Ripple voltage can be measured most accurately
with an oscilloscope. However, an alternate way
to get an indication of ripple voltage is with a
CE meter {PN1749231I.
a. Connect a capacitor (O.22 uF or larger, 50 Vdc
or higher) in series with one of the meter leads.
b. Set the meter range to 2.5 Vac.
c. Connect one meter lead to the dc voltage in
question, the other lead to frame ground.
(Remember, a capacitor is in series with one
of the leads.)
d. If the meter pointer leaves zero on the meter
scale, excess ripple voltage may be present.
Wiring Diagrams 7-3

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