Power Supply (Models 380, 390, 39H, And 397) - IBM 7012 300 Series Installation And Service Manual

Power Supply (Models 380, 390, 39H, and 397)

For a translation of the following notice, see System Unit Safety Information , order number
SA23-2652.
DANGER
Do not attempt to open the covers of the power supply. The power supply is
not serviceable and is to be replaced as a unit.
Removal
14. Set the power switches of the attached devices to Off.
15. Set the power switch of the system unit to Off.
16. Unplug the power cord from the electrical outlet first, and then disconnect from the
power supply.
17. Do the "Top Cover" removal procedure on page 3-4.
18. Disconnect all power supply cables.
19. Loosen the power supply mounting screw at the front of the power supply unit.
20. Lift the front of the power supply slightly, and then slide it forward approximately 5mm
and then lift it out.
Models 380, 390, 39H
3-18
Installation and Service Guide
Front
P3 (Disk)
P27 (Rear Fan)
P28 (Media)
P29
P30
(On/Off)
P26
(Front Fan)
P4 (Disk)
P2
I/O Power
P25
Connector
Power
Control