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3-40 Installation and Service Guide
System Planar
Note: Refer to “Handling Static-Sensitive Devices” on page 3-2 before removing or
installing the system planar in this system.
Removal
1. Set the power switches of the attached devices to Off.
2. Set the power switch of the system unit to Off.
3. Disconnect the power cable.
4. If the system unit model has a rear cover, do the Rear Cover removal procedure on page
3-3.
5. Perform the Top Cover removal procedure on page 3-4.
6. For all system unit models except models 380, 390, 39H, and 397, do the Front Cover
removal procedure on page 3-6.
7. If the system unit model is a 380, 390, 39H, or 397, lift up the disk drive frame assembly
and lay it on the power supply. For all other models, do the appropriate disk drive
removal procedure for your system unit located in the “Disk Drive” section of this chapter.
But, leave the disk drives in the frame.
8. For all models except 380, 390, 39H, and 397, do the Power Supply removal procedure
on page 3-16, but leave the diskette drive on the power supply.
9. Record the external adapter cable positions and remove all cables.
10.Record the card positions and remove all cards and I/O slot brackets.
11. Record the other I/O cable positions and remove the other I/O cables (such as the
keyboard and mouse).
12.Remove the rear card guide bracket. (Model 397)
13.Remove the rear fan assembly.
14.Perform the Card Guide Frame removal procedure on page 3-43, but leave the front fan
in the card guide frame. Note that the longest screw goes through the option card down
stop.
15. For all models except 380, 390, 39H, and 397, do the Rear Fan removal procedure on
page 3-45.
16.Record the positions of the remaining system planar mounting screws and remove them.
17.Remove the stand-off screws from the parallel port and the SCSI port connectors at the
rear of the system unit. On the Models 340, 34H, 350, 355, 360/36T, 365, 370/37T, and
375, remove the two additional screws from the SCSI port.
18. For all models except 380, 390, 39H, and 397, carefully pry the EMI ground strip off the
system planar (the strip may have sharp edges).
19.Remove the system planar from the base.