Model 2750 Multimeter/Switch System Service Manual Disassembly 5-5
Disassembly
Card cage removal
After the motherboard has been removed, the 2-slot card cage underneath that holds plug-
in modules can be removed simply by removing the three screws (two top, one bottom)
that attach the card cage to the case bottom. The 3-slot card cage can be removed in a sim-
ilar manner by removing the three screws (two top, one bottom) that secure it to the chas-
sis, although it is not necessary to remove the motherboard to do so.
Front panel disassembly
Use the following procedures to remove the display board and/or the pushbutton switch
pad:
NOTE You must first remove the case cover and the front/rear input switch rod, and dis-
connect the front input terminal wires as described earlier in this section.
1. Unplug the display board ribbon cable from connector J1014 if you have not
already done so.
2. Remove the front panel assembly.
3. Remove the four screws (two on each side) and two internal kep nuts that secure
the front panel to the chassis, then pull the front panel assembly forward until it
separates from the chassis.
4. Remove the four screws that secure the display board to the front panel. Pull the
display board from the front panel.
5. Remove the switch pad by pulling it from the front panel.
Removing power components
The following procedures to remove the power transformer and/or power module require
that the case cover be removed as previously explained.
Power transformer removal
Perform the following steps to remove the power transformer:
1. Disconnect the two power cables connected to the motherboard and the wires
going to the rear panel power module.
2. Remove the two nuts that secure the transformer to the bottom of the chassis.
3. Pull the black ground wire off the threaded stud, and remove the power transformer
from the chassis.
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