HP color laserjet 2550 series Manuales De Servicio
Step 5: primary transfer
The primary transfer roller, to which a dc positive bias is applied, imparts a positive charge
on the transfer belt. The negatively charged toner on the drum is transferred to the positively
charged transfer belt. This procedure is repeated for each color (yellow, magenta, cyan, and
black).
on the transfer belt. The negatively charged toner on the drum is transferred to the positively
charged transfer belt. This procedure is repeated for each color (yellow, magenta, cyan, and
black).
The dc positive bias is increased for each successive color to make sure that all of the colors
adhere to the transfer belt.
adhere to the transfer belt.
Figure 4-20.
Step 4: primary transfer
Step 6: secondary transfer
The secondary transfer roller, to which a dc positive bias is applied, imparts a positive
charge to the print media. When the print media comes in contact with the transfer belt, the
toner is transferred to the print media.
charge to the print media. When the print media comes in contact with the transfer belt, the
toner is transferred to the print media.
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Chapter 4 Theory of operation
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