Keithley 2182, Service Manual, Page: 71 / 120

Removing power components
The following procedures to remove the power transformer and/or power module require that
the case cover and motherboard be removed, as previously explained.
WARNING Disconnect the line cord and input connector before removing the case
cover.
Power transformer removal
Perform the following steps to remove the power transformer:
1. Remove motherboard.
2. Unplug the transformer wires that are connected to the power module at the rear panel.
3. Remove the cable tie.
4. Remove the two nuts that secure the transformer to the bottom of the chassis.
5. Remove the transformer shield.
6. Pull the black ground wire off the threaded stud, and remove the power transformer from
the chassis along with the shielded wires.
Power module removal
Perform the following steps to remove the power module:
1. Remove the motherboard.
2. Unplug the transformer wires that attach to the power module at the rear panel.
3. Disconnect the power module's ground wire. This green and yellow wire connects to a
threaded stud on the chassis with a nut.
4. Squeeze the latches on either side of the power module while pushing the module from
the access hole.
5-8 Disassembly