Chapter 3 Replacing Assemblies
Removing the Cooling Fan
Assembly Level Service Guide
3-13
3
Removing the Cooling Fan
Use the following procedure to remove the cooling fan:
1
Remove the shroud (see “Removing the Shroud” on page 3-7).
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
(directly under the fan).
3
Use a #1 Phillips screwdriver and a 1/4-inch wrench or nut driver 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 3-7).
Figure 3-7. Cooling Fan Screws
4
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 instrument.
Summary of Contents for 53147A
Page 6: ...Contents vi Assembly Level Service Guide ...
Page 13: ...1 Performance Tests Verifying Specifications ...
Page 55: ...2 Service ...
Page 88: ...Chapter 2 Service Troubleshooting the Instrument 2 34 Assembly Level Service Guide 2 ...
Page 89: ...3 Replacing Assemblies Disassembly and Reassembly ...
Page 104: ...Chapter 3 Replacing Assemblies Removing the Power Supply 3 16 Assembly Level Service Guide 3 ...
Page 105: ...4 Replaceable Parts ...
Page 116: ...Chapter 4 Replaceable Parts Parts Identification 4 12 Assembly Level Service Guide 4 ...
Page 117: ...5 Backdating ...
Page 119: ...6 Specifications ...
Page 125: ...A Rack Mounting the Instrument ...
Page 134: ...Index Index 4 Assembly Level Service Guide Index ...