Canon Vizcam 1000, Руководство по обслуживанию

Страница: 162 / 840

3. OPERATION AND TIMING
COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
3-118
As shown in Figure 3-549, the hopper consists of a main hopper and a sub hopper. Bk toner requires
higher precision than color toner for supply operation because its amount of supply is based on a value
computed from video signals. To ensure precision, the main hopper, in which toner tends to cake less, is
used to supply toner to the developing assembly.
Figure 3-549
If the results of measuring the toner density indicate that the density of toner inside the developing
assembly is below a specific value, the DC controller sends the toner supply signal to turn on the toner
supply clutch. As a result, the drive of the Pick-up motor will be transmitted to the toner supply screw to
supply the developing assembly with toner.
The toner density signal is used to determine how long toner should be supplied, i.e., how long the toner
supply clutch should remain on.
CL4
CL5
M10
Toner supply
clutch (upper)
Toner supply
clutch (lower)
Toner level
sensor (lower)
(TS5)
Pick-up motor
drive signal (M10MD)
Toner supply (upper) signal (CL4D*)
Pick-up motor toner supply
(lower) signal (CL5D*)
Toner level detection (lower) signal (BKTEPL*)
Toner level detection (upper) signal (BKTEPU*)
DC
controller
PCB
Toner level sensor
(upper)
(TS4)