Sharp AR-121E, Service Manual

Page: 65 / 138

5. The solenoid turns off to close the gate and return to the in-
itial state.
C. Conditions of occurrence of paper misfeed
(1) When the power is turned on:
PPD or POD is ON when the power is turned on.
(2) Copy operation
a. PPD1 jam 1) PPD1 does not turn off within 4 sec
after turning on the resist roller.
b. PPD2 jam 1) PPD2 is off immediately after turning on
the resist roller.
2) PPD2 does not turn off within 1.2 sec
after turning off the resist roller.
c. POD jam 1) POD does not turn on within 2.9 sec
after turning on the resist roller.
2) POD does not turn off within 1.5 sec
∼
2.7 sec after turning off PPD2.
Process unit new drum detection
mechanism
1. When the power is turned on, the detection gear 38T is
rotated in the arrow direction by the detection gear 20T to
push the microswitch (process detection switch) installed to
the machine sensor cover, making a judgement as a new
drum.
2. When the detection gear 38Y turns one rotation, there is no
gear any more and it stops.
The latch section of the 38T gear is latched and fixed with
the projection of the process cover.
OF
MPFS
F
A
C
Gear 20T
Process detection switch
Gear 38T
Gear notch
Gear pawl
Projection
Gear notch
Gear pawl
Projection
AL-1000/1010
7-8