Service manual

AL-2051 OPERATIONAL DESCRIPTIONS 7 - 7
(3) Conditions of occurrence of paper misfeed
a. When the power is turned on:
PPD or POD is ON when the power is turned on.
b. Copy operation
6. 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
micro-switch (process detection switch) installed to the machine
sensor cover, making a judgement as a new drum.
2) When the detection gear 38T 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.
a PPD1 jam PPD1 does not turn off within 4 sec after
turning on the resist roller.
b PPD2 jam PPD2 is off immediately after turning on the
resist roller.
PPD2 does not turn off within 1.2 sec after
turning off the resist roller.
c POD jam POD does not turn on within 2.9 sec after
turning on the resist roller.
POD does not turn off within 1.5 sec - 2.7 sec
after turning off PPD2.
Gear 20T
Process detection switch
Gear 38T
Gear notch
Gear pawl
Projection
Gear notch
Gear pawl
Projection