Ricoh Aficio SP 5100N, Service Manual

Page: 153 / 175

Engine Hardware Specifications
SM 6-15 G186
Det
ailed
Section
Des
cription
s
-Triac (THY1) feature:12A, 600V SWITCHING
-Phototriac Coupler (PC3)
Turn On If Current: 15mA 50mA(Design :16mA)
High Repetitive Peak Off State Voltage: Min 600V
6.3.5 ENGINE FIRMWARE
Control Algorithm
When feeding from a cassette, the drive of the pickup roller is controlled by controlling the
solenoid. The on/off of the solenoid is controlled by controlling the general output port or
the external output port. Jam occurrences are categorized as follows.
ITEM Description
JAM 0
ƒ After picking up, paper is not fed from the paper cassette.
ƒ After picking up, paper has been fed but it does not reach the feed
sensor for a certain time due to slip, etc.
ƒ After picking up, the feed sensor does not turn on, and then retries to
pick up. After the second pick up, the feed sensor does not turn on for a
certain time, it is considered to be JAM 0.
*This status means that the leading edge of the paper doesn’t pass the
feed sensor.
ƒ Even though the paper reaches the feed sensor, the feed sensor does
not turn on.
*This status means that the leading edge of the paper has already
passed the feed sensor.
JAM 1
ƒ After the leading edge of the paper has passed the feed sensor, the
trailing edge of the paper does not pass the feed sensor for a certain
time. (The feed sensor cannot be OFF)
ƒ After the leading edge of the paper has passed the feed sensor, the
paper does not reach the exit sensor for a certain time. (The exit sensor
does not turn on.)
*This status means that the paper exists between the feed sensor and
the exit sensor.