Toner Transfer To The Accumulator Belt; Figure 5-8 Toner Transfer To The Accumulator Belt - Tektronix PHASER 560 Service Manual

Toner transfer to the accumulator belt

Downloaded from www.Manualslib.com
As the photoconductive belt rotates, it comes in contact with the accumulator
belt, which rotates at the same speed. The first bias transfer roller, located under
the accumulator belt at the contact point with the photoconductive belt, carries a
charge which varies between +500 and +700 volts based on the sensed
temperature, humidity, and print speed. This strong potential attracts and holds
the toner from the photoconductive belt to the accumulator belt. The
accumulator belt rotates four times so it can pick up or accumulate each of the
four toner layers, one layer on top of the last. An accumulator belt
home-position sensor sync signal, generated from a timing mark on the
accumulator belt, informs the engine control board that it is time to begin
exposing the next toner layer's information onto the photoconductive belt.
When that happens, the accumulator belt is rotated in the proper position to
transfer the toner layer in proper registration with the previous layer(s).
Any toner remaining on the photoconductive belt after the transfer to the
accumulator belt is scraped off by the photoconductive belt cleaning blade,
which is always in contact with the belt. This leaves the photoconductive belt
clean for the next layer of toner to be transferred from the toner cartridges.
The pre-transfer
charger gives the
toner a uniform
negative charge
Accumulator
belt home
sensor

Figure 5-8 Toner transfer to the accumulator belt

manuals search engine
Photoconductive belt
cleaning blade
+500 ~ 700v
First bias
transfer
roller
Accumulator
belt
5
Theory of Operation
Photoconductive
belt
The toner on the
photo-conductive
belt is attracted to
the strong positive
potential of the first
bias transfer roller.
Four layers of toner,
latent images of
cyan, magenta,
yellow and black,
build up on the
accumulator belt
9697-33
5-11
Service Manual