Removing The Cooling Fan - Agilent Technologies 53150A Service Manual

Chapter 3 Replacing Assemblies

Removing the Cooling Fan

Removing the Cooling Fan
Use the following procedure to remove the cooling fan:
1 Remove the shroud (see "Removing the Shroud" on page 3-8).
2 Disconnect the two-wire cooling-fan power cable (blue and red wires) from
J16 on the main board. J16 is the connector that is closest to the rear
panel assembly near the right chassis wall and behind the power supply.
3 Open the two cable clamps that are attached to the floor of the chassis
immediately behind the front panel assembly, and remove the cooling-fan
cable from the cable clamps.
4 Extract the end of the cooling-fan cable from under the power supply by
pulling it toward the front of the Counter with one hand while guiding the
connector with your other hand.
5 Use a #1 Phillips screwdriver and a 1/4-inch wrench or spin tight to
remove the four 4-40 x 1-inch panhead machine screws and 1/4-inch
self-locking hex nuts that attach the cooling fan to the chassis (see
Figure 3-12).
Figure 3-12. Cooling Fan Screws
6 While removing the cooling fan from the chassis, guide the cable to be sure
it does not catch on other cables or other components of the Counter.
Assembly Level Service Guide 3-15