Tektronix TLA 714, Service Manual

Page: 75 / 159

Removal and Installation Procedures
4–28
TLA 714 Color Portable Mainframe Service Manual
Individual Fans
You will need a screwdriver with a size T-15 Torx tip, a Philips screwdriver,
pliers, a side cutter, and a scribe or jeweler’s screwdriver or other small, pointed
tool 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 4–26.
2. Remove the screw that secures the hold down brackets to the rear chassis fan
tray. (See Figure 4–13 on page 4–29.) 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 the 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. Remove the cable tie(s) if necessary.
6. Remove the fan wires from the cable connector. (Pay attention to the wire
color locations for reinstallation.) Use a scribe or jeweler’s screwdriver to
gently push down the “finger” of metal that secures (latches) the wire end
into the connector. (See insert, Figure 4–13 on page 4–29.) At the same time,
pull gently on the wire until it comes out of the connector.
Use the following procedure to reinstall the individual fans from 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 4–13 on page 4–29.)
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