Samsung ML-2250/XBG, Service Manual

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4-17
Samsung Electronics
Summary of product
Service Manual
4.5 Engine F/W
4.5.1 Feeding
If feeding from the cassette the drive of the pickup roller is controlled by controlling the pick-up solenoid. The on/off
of the solenoid is controlled by controlling the general output port or the external output port. If feeding from the
manual feeder the set decides to feed the paper according to the operation of the manual sensor, and by driving
the main motor, insert the paper in front of the feed sensor. When paper moves the occurrence of a paper jam is
judged as below.
JAM 0
JAM 1
JAM 2
*IThis is an indcation that the leading edge of the paper doesn't pass the feed sensor.
-After the picking up cycle paper does not enter the set because no paper is picked up.
-After the picking up cycle paper enters the set but it does not reach the feed sensor in certain time due to
slip, etc.
-After the picking up cycle if the feed sensor is not on re-pick up. After re-picking up, if the feed sensor is not
on after certain time, it is JAM 0.
-Even though the paper reaches to the feed sensor, the feed sensor is not ON.
*This is an indication that the leading edge of the paper has already passes the feed sensor.
-After the leading edge of the paper passes the feed sensor the trailing edge of the paper does not pass the
feed sensor within a certain time. (The feed sensor cannot be OFF during this time)
-After the leading edge of the paper passes the feed sensor the paper does not reach the exit sensor within
a certain time. (The exit sensor cannot be ON during this time)
*The paper exists between the feed sensor and the exit sensor.
-After the trailing edge of the paper passes the feed sensor the trailing edge of the paper does not pass the
exit sensor within a certain time.
ITEM Description