GBC Docuseal 2700 Service Manual page 15

5.8 Mechanical Operation
The upper and lower film webs are pulled over the heat shoes and through the laminator by four
rollers. The two lower rollers are chain driven. The upper rollers are driven by the lower rollers.
The diameter of the front "pull" rollers is slightly smaller than the "nip" rollers at the rear. This
provides tension on the laminate as the film passes through the laminator.
The two film webs are stretched tight as they leave the supply rolls and enter the laminator. The
film tension is provided by two adjustable brake assemblies located on the left side frame. The
upper and lower brake assemblies restrict or drag the respective supply roll shafts as the shafts
revolve.
5.9 General Troubleshooting
Troubleshooting is based on visual observations by the operator and the technician. It is
important to know the basic principles of lamination to separate application problems from
equipment malfunctions.The cause of the malfunction can be isolated by noting at which point in
operating cycle the malfunction occurred. Use the Troubleshooting Guide on the following pages
to help pinpoint and correct malfunctions.
5.0 TROUBLESHOOTING