IBM 6643 - Manual (Page 21)

Chapter 4. FRU replacements
Moving The Computer . . . . . . . . . . 13
System board layout . . . . . . . . . . . 14
CMOS Clear jumper settings . . . . . . . . 15
Processor Speed Settings . . . . . . . . . . 15
System Board Memory . . . . . . . . . . 15
Removing a DIMM . . . . . . . . . . . . 15
Installing a DIMM . . . . . . . . . . . . 16
Power Supply . . . . . . . . . . . . . 16
20-pin main power supply connection . . . . . 16
Display . . . . . . . . . . . . . . . . 17
Computer exploded view (Types 2179 and 6643) . . 18
Input/Output connectors . . . . . . . . . . 19
Controls and status indicators . . . . . . . . 20
Rear bucket housing (rear cover) removal . . . . 21
Upper base cover and base cover wing removal . . 22
Hard disk drive removal . . . . . . . . . . 23
Rear EMC cover assembly removal . . . . . . 23
Diskette drive/CD-ROM drive/DVD drive removal 24
Removing the drives from the drive bracket
assembly . . . . . . . . . . . . . . 24
Speaker assembly removal . . . . . . . . . 25
Battery removal and installation . . . . . . . 25
Fan removal . . . . . . . . . . . . . . 26
Power supply removal . . . . . . . . . . . 26
Processor removal . . . . . . . . . . . . 28
System board removal . . . . . . . . . . . 29
Power inverter board removal . . . . . . . . 29
Chassis assembly removal . . . . . . . . . 31
Front bezel removal . . . . . . . . . . . 32
LCD removal . . . . . . . . . . . . . . 32
LCD Receiver card removal . . . . . . . . . 33
Installing the Receiver card . . . . . . . . 34
Hinge assembly removal . . . . . . . . . . 34
Moving The Computer
Take the following precautions before moving the Type 2179 or Type 6643
computer.
1. Remove all media from the drives.
2. Power-off the computer and all attached devices. The hard disk drive
automatically parks the read/write heads to prevent damage to the hard disk.
3. Unplug the power cords from the electrical outlets.
4. Disconnect the communication, modem, and/or network cables from their
outlets first, then from the computer.
5. Disconnect all attached device cables from the computer.
6. If you are moving the computer a short distance, you can carry the keyboard
on the computer base.
© Copyright IBM Corp. 2004 13