Canon iR C2880 series, Руководство по обслуживанию

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Chapter 7
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2. Detection by toner refill quantity detection sensor
This detection sequence works out the quantity of remaining toner from the outputs of the toner refill quantity detection sensors (PS3 to 6) and displays the quantity
on the touch panel in units of 1%. The sequence is performed when power is turned ON, upon image formation (for each 1% of consumption), when toner has run
out (0% notification) or when the toner status changes from no toner to toner present.
When toner is absence, the printing operation of the main body is stopped.
The toner feed level per one block varies, so the toner residual information is just a target. When the toner residual becomes 1% or less, the residual information is
not displayed on the touch panel and 0% is displayed at the time of the toner absence.
When toner is absence, the printing operation of the main body is stopped.
The toner feed level per one block varies, so the toner residual information is just a target. When the toner residual becomes 1% or less, the residual information is
not displayed on the touch panel and 0% is displayed at the time of the toner absence.
7.6.4 Toner Container Detection
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/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880
The device does not have toner container detection.
Even if there is no toner container in the device, there will be residual toner in the refill screw, etc., so printing can continue for a few more sheets. If printing is
continued for just a few sheets, there should be no problem as regards image quality.
Then, the piezo-sensor that carries out the remaining toner quantity detection will detect toner out and will stop the print operation.
7.7 Transfer Unit
7.7.1 Outline of the Transfer Unit
7.7.1.1 Overview
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/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880
The transfer assembly is divided into the primary transfer block and the secondary transfer block.
The primary transfer block serves to move toner from the photosensitive drum to the ITB, while the secondary transfer block functions to move toner from the ITB
to print paper.
The transfer assembly consists of the following components: ITB cleaning unit, ITB, primary transfer roller, primary transfer roller, secondary toner inside roller,
tension roller, secondary transfer outside roller.
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[1] ITB cleaning unit
[2] ITB cleaning feedscrew
[3] ITB cleaning blade
[4] Tension roller
[5] Primary transfer roller
[6] ITB
[7] Idler roller
[8] Secondary transfer inside roller
[9] Secondary transfer outside roller
[10] Secondary transfer static eliminator
[11] Primary transfer block
[12] Secondary transfer block
7.7.1.2 Primary Transfer Block
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/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880
The primary transfer block uses the drum/ITB motor (M1) to rotate the secondary transfer roller and the ITB cleaning feedscrew. The drive of M1 is controlled by
the DC controller.
The following describes the major control mechanism associated with the primary transfer block:
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
[11] [12]