Tektronix TLA 704, Руководство по обслуживанию

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Removal and Installation Procedures
TLA 704 Color Portable Mainframe Service Manual
6–23
Individual Fans
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1 and 2,
page 6–6) a Philips screwdriver (Table 6–1, item 5), a pair of pliers (Table 6–1,
item 6), a pair of side cutters (Table 6–1, item 7), and a scribe or jeweler’s
screwdriver (Table 6–1, item 8) or other small, pointed tool such as a bent paper
clip, to perform this procedure.
Use the following procedure to remove an individual fan from the rear chassis
fan tray:
1. Do the Rear Chassis Fan Tray removal procedure, page 6–21.
2. Use a Philips screwdriver to remove the screw that secures the hold down
brackets to the rear chassis fan tray. (See Figure 6–9 on page 6–24.) If you
are replacing one of the two fans nearest the cable connector, you need
remove only one of the hold-down brackets. Otherwise, remove two.
3. Use a pair of pliers to gently straighten the metal tabs holding the fan to the
rear chassis fan tray.
4. Lift the fan from the rear chassis fan tray.
5. Make note of the fan cable dress and remove the tie holding the cables
together near the connector. Use a pair of side cutters to remove the cable tie.
6. Remove the fan wires from the cable connector. (Pay attention to the wire
color locations for reinstallation.) Use a scribe, jeweler’s screwdriver, or bent
paper clip to gently push down the “finger” of metal that secures (latches)
the wire end into the connector. (See insert, Figure 6–9 on page 6–24.) At the
same time, pull gently on the wire until it comes out of the connector.
Use the following procedure to reinstall the rear chassis fan tray:
1. Reinsert the fan wires into the cable connector. Be sure to insert the
(color–coded) wires into the same locations as they were removed from in
step 6, above. The “finger” of metal that secures the wire end into the
connector should be pointed up and outward for it to lock into place. (See
insert, Figure 6–9 on page 6–24.)
2. Position the fan onto the rear chassis fan tray.
3. Gather the fan cables together, tie them together with a cable tie, and
position them so that they do not interfere with any fan blades.
4. Use a pair of pliers to gently bend the metal tabs that hold the fan to the rear
chassis fan tray until the fan is held firmly in position.
Removal
Installation