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Outline
A.
T h e p r e s e n c e o f p a p e r o n t h e m u l t i -
purpose tray is sensed by photointerrupter
PS702, and the presence of paper in t h e
cassette is sensed by photointerrupter
PS60 1.
The presence and size of the cassette
installed in the printer are sensed by three
switches (SW603. 604, 605) mounted on
the pick-up motor driver PCB.
If the pick-up roller clutch solenoid
/1"1"
1
Delivery Aers
R
PS201: Delivery paper sensor
PS601: Cassette paper sensor
PS602: Aeglst paper sensor
PS701: Multi-purpose tray paper end sensor
PS702:
Multi-purpose tray paper sensor
Cassetle
SL701:
pick-up roller clutch solenoid
SL702: Multi-purpose tray pick-up roller clutch solenoid
Photosensitive
Cassette pick-up roller
Cassette sensing
Figure 2-32
[SL70 1, SL702) energizes when the pick-up
motor is running, the pick-up roller (urns
and feeds a sheet of paper into the printer.
The paper stops at the resist paper sensor
(PS602). The video controller sends the
VERTICAL SYNC signal after the paper
reaches the sensor, and the leading edge of
t h e t o n e r i m a g e o n t h e p h o t o s e n s i t i v e
drum is matched with the leading edge of
the paper. The image is transferred, then
the paper is separated from the drum, fed
to the fixing unit, and delivered onto the
face-down tray.
Pick-up motor driver PCS
SW6
Cassette size
switches SW605
CHAPTER 2
I
2 - 27
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