Interleaf EP5000/EP4000 GENERAL, MECHANICAL/ELECTRICAL
97.04.01
M-84
1156SBM2104A
21-4. Prevention of Low Image Density on Copy
During conditions of high humidity when the paper is damp, charges tend to flow
from the Image Transfer Corona through the paper and guide plates to the ground.
This results in low image density on the copies. To prevent this from occuring, a
plastic spacer is installed between the copier frame and each guide plate around
the Synchronizing Rollers so that it remains insulated. Instead of using the plastic
spacer, an electrodeposition coating has been applied to some of those guide
plates. If, however, the resistance with the ground is made infinity, the guide plate
would build up charges and a spark could occur with other guide plates, resulting
in a malfunction. To prevent this, a resistor and a varistor are connected to the guide
plates. The guide plates are connected by flat springs as illustrated below.
Upper Vertical
Transport Rollers
1136M053AA
Varistor
Resistor
Manual Bypass
Feed/Separator Rolls
Transport
Rollers
Synchronizing Rollers
À
Á
Â
Æ
Ã
Å
Ä
No.
Guide Plate Name
Insulation Method
À
Upper Pre-Synch Guide Plate
Plastic Spacer
Á
Lower Pre-Synch Guide Plate
Plastic Spacer
Â
Upper Transport Roller Guide Plate
None [Fitted to top of guide plate no.
Ã
]
Ã
Lower Transport Roller Guide Plate
Plastic Spacer
Ä
Manual Bypass Guide Plate
Electrodeposition Coating
Å
Vertical Transport Guide Plate
Plastic Spacer
Æ
Pre-Image Transfer Guide Plate
Fitted to plastic holder of Image Transfer/Pa-
per Separator Coronas