5-4 Disassembly Model 2500 Service Manual
Case cover removal
WARNING Before removing the case cover, disconnect the line cord and any test
leads from the instrument.
Follow the steps below to remove the case cover to gain access to internal parts.
1. Remove handle — The handle serves as an adjustable tilt-bail. Adjust its position
by gently pulling it away from the sides of the instrument case and swinging it up
or down. To remove the handle, swing the handle below the bottom surface of the
case and back until the orientation arrows on the handles line up with the orienta-
tion arrows on the mounting ears. With the arrows lined up, pull the ends of the
handle away from the case.
2. Remove mounting ears — Remove the screw that secures each mounting ear. Pull
down and out on each mounting ear.
NOTE When reinstalling the mounting ears, make sure to mount the right ear to the
right side of the chassis, and the left ear to the left side of the chassis. Each ear
is marked RIGHT or LEFT on its inside surface.
3. Remove rear bezel — To remove the rear bezel, loosen the two screws that secure
the rear bezel to the chassis, then pull the bezel away from the case.
4. Remove bottom screws — Remove the four screws that secure the case to the
chassis. They are located on the bottom of the case.
5. Remove chassis — To remove the case, grasp the front bezel of the instrument,
and carefully slide the chassis forward. Slide the chassis out of the metal case.
Input board removal
Perform the following steps to remove the two input boards. This procedure assumes that
the case cover is already removed.
1. Remove the INPUT jack nuts.
Each INPUT jack has a nut that secures the jack to the rear panel. Remove these
two nuts and lock washers.
2. Remove input board bracket mounting screws.
Remove the two mounting screws that secure the input board support bracket to the
chassis.
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