Dell 3010CN Service Manual page 549

2nd BTR is a conductive roll, which contacts the rear side of toner transferred side of paper
and to which positive voltage is applied from HVPS.
Back Up Roll that faces the 2nd BTR across the belt is earthed to frame ground using a
conductive roll.
When voltage is applied from the 2nd BTR at the rear side of paper, a negative charge is
induced on toner transferred side of paper, and the positive charged toner image on the belt
surface is transferred to the paper from the belt.
Back Up Roll Belt Paper 2nd BTR
HVPS
Back Up Roll
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Belt Paper
Belt surface
Residual
toner
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6 - 12
Chapter 6 Principle s of O peration
: Negative charge
: Positive charge
: Toner
Detack Saw
2nd BTR
HVPS
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Paper surface
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