IBM 3745 Series, Hardware Maintenance Reference

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Primary Power Box
Primary Power Box Component Location
┌───────────┬──────────┐ ┌──────────────────────┐
│ ┌─┐ ┌─┐ │ ┌──┐│ │ │
│ └─┘ └─┘ │ └──┘│ │ │
│ J6 J7 │ J1 │ │ │
│ │ │ │ │
│ SW1 CP3│ │ │ │
│ ┌─┐ F1 ┌┐│ │ Frame │ │
│ └─┘ O └┘│ │ ground ├──────────────────────┤
│ J8 J9 │ CB1 CP2 │ ────────┼─── ┌┐ J5 J6 J7 J8 │
│ ┌─┐ ┌─┐│ ┌─┐ ┌┐ │ │ └┘J2 ┌┐ ┌┐ ┌┐ ┌┐ │
│ └─┘ └─┘│ └─┘ └┘ │ │ ┌──┐ ││ ││ ││ ││ │
├───────────┘ │ │ └──┘J3 └┘ └┘ └┘ └┘ │
└──────────────────────┘ └──────────────────────┘
Front View Rear View
CB1 = Main CB J2 = Customer plug (see following details)
CP2 = AC for PS2 J3 = AC input
CP3 = DC for fans J5-J8 = EPO plugs
F1 = 28-volt fuse for
control panel and PCC card
J1 = AC to PS1
J6 = DC to fan 2
J7 = DC to fan 1
J8 = To UEPO switch
J9 = PS control to MOSS
SW1:= Voltage adjustment switch
(2ðð, 22ð, or 24ð volts)
Figure 10-2. Primary Power Box Component Location
Customer Plug
The J2 connector is for the customer and provides a normal-open contact when the power is OFF, and
reverse its state when the power is ON.
Electrical Characteristic:
30 volts AC or 42.4 volts peak or DC, at 20 to 500 mA.
For details, see page YZ561.
10-6
IBM 3745 Models 130, 150, 160, 170, and 17A: Hardware Maintenance Reference