Preparing the GC
5
5. Loosen the five captive screws in the top rear panel with a T-20 Torx
screwdriver. Grasp the panel at each end and gently lift it up and away
from the GC. Be careful not to disrupt the supply tubing.
6. Raise the gray plastic top cover (with the holes and ventilation slots) to
the vertical position. Examine the hinge in the right rear corner.
• Early 6890 models. The hinge is a metal bracket attached to the
oven top. Pull the clip at its top toward you to release the hinge pin.
Push the pin to the left to release the cover. Raise the right side of
the cover and remove it.
• Current 6890 models. Raise the right side of the cover and remove
it.
Pneumatics cover
RFI cover
Makeup gas regulator
(nonEPC detectors only)
Loosen five
screws
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