Service manual

(3) In 4C Mode (Full Color Mode)
After the start key has been pressed, the development unit rotates the four
colors into position in order. Each step is 90 degrees, so the revolver turns in
the same way as in 2C mode for Red or Blue; no extra belt turn is needed for
an 180-degree turn of the revolver (however, only a 90-degree turn is
needed between copies of a multi-copy job). After a copy job, the machine
performs the revolver H.P. process.
(4) During the Process Control Self Check
After the main switch is turned on, the machine performs the revolver H.P.
process, then the process control self check. During the potential sensor
calibration and the confirmation procedure, the development unit rotates 135
degrees (halfway between two color positions) this is to prevent toner from
being attracted to the drum. Then the machine measures the drum potential
voltage or corrects the drum potential. After the process control self check,
the machine performs the revolver H.P. process again, then the
development unit rotates 5 times for toner replenishment.
C: Development Roller
M: Development Roller
Y: Development Roller
Bk: Development Roller
Detailed
Section
Descriptions
DEVELOPMENT UNIT
SM 2-91 A166/A187/A189
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA