Canon imagePRESS C1 Service Manual - page 410
Chapter 7
7-61
The primary transfer assembly has the function of transferring the toner on the photosensitive drum to ITB. The secondary transfer assembly has the function of
transferring the toner transferred primarily on ITB to the print paper.
The main parts of the transfer assembly are ITB cleaning screw, brush roller/blade for ITB cleaning, ITB drive roller, ITB, potential plate, primary transfer roller,
tension roller, ITB inside scraper, secondary transfer outside roller, brush roller/blade for secondary transfer cleaning, etc.
F-7-76
[1] ITB cleaning screw
[2] Brush roller for ITB cleaning
[3] Blade for ITB cleaning
[4] Cleaning bias roller
[5] ITB drive roller
[6] ITB
[7] Potential plate
[8] Primary transfer roller
[9] Tension roller
[10] ITB inside scraper
[11] Secondary transfer outside roller
[12] Brush roller for secondary transfer cleaning
[13] Blade for secondary transfer cleaning
[14] Secondary transfer cleaning bias roller
[15] Secondary transfer inside roller
7.9.2 Transfer Bias Control
0013-7364
imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
There are primary transfer bias used at the primary transfer assembly and secondary transfer bias used at the secondary transfer assembly.
There are three kinds of bias (DC bias for primary transfer, DC reverse bias for primary transfer, tension roller bias) for the primary transfer bias.
And there is a bias roller to collect the residual toner on ITB.
There are two kinds of bias (DC bias for secondary transfer, DC reverse bias for secondary transfer) for the secondary transfer bias.
And there is a bias roller to collect the patch image at paper-to-paper interval.
These biases are generated by the high-voltage PCBs 2, 4 and 9 according to the instructions of the DC controller, and are applied to their respective loads (primary
transfer roller, tension roller, secondary transfer inside roller).
Primary transfer
assembly
Secondary
transfer assembly
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[2]
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