Service manual

Power Cabinet Component Removal and Replacement 5-27
Removal
1. Shut down the operating system(s)
2. Open the rear door.
3. Trip the main circuit breaker on the AC input box(s).
4. Open the front door.
5. Working at the back of the open door, disconnect the power cable to the back
of the OCP.
6. Unplug the signal cable(s) at the back of the OCP.
7. If the OCP assembly is connected to the door using screws, go to step 11.
8. If the OCP assembly is held to the door by Tinnerman nuts
on two plastic
posts, one to the right and one to the left of the electronics, then proceed
with this step. Starting with the post to the left, grasp the top of the door
with one hand and with the other place a flathead screwdriver in the post
and push until that side of the OCP releases.
9. Repeat step 8 on the post to the right and remove the OCP assembly from
the door.
CAUTION: Be careful not to push so hard that the panel falls off the door.
10. If the replacement OCP uses screws to attach the assembly to the door,
remove the Tinnerman nuts.
11. Remove the four Phillips head screws holding the OCP assembly to the
door. Remove the assembly.
Replacement
Reverse the steps outlined in the removal procedure.
Verification
Observe that the display is working and make sure the reported problem is
fixed. When powering up the system, b
e sure to put the circuit breakers in the On
position before you put the OCP switch in the On position.