Ricoh LDD250, Service Manual

Page: 251 / 459

ELECTRICAL COMPONENT DEFECTS
SM 4-17 C262/C265
Trouble-
shooting
Name State Symptoms
Detects that the box is not
locked, but it is locked The eject box lock solenoid does not lock
the box after the main switch is turned on
or the security mode is canceled.
It is not possible to install the master eject
box.
4.4.6 PAPER FEED
Name State Symptoms
Detects paper, but there
is no paper A jam occurs after the main switch is
turned on. Paper registration
sensor
Does not detect paper,
but there is paper A jam occurs when the Start button is
pushed.
Detects paper, but there
is no paper A jam occurs after the main switch is
turned on. Paper feed timing
sensor
Does not detect paper,
but there is paper A jam occurs when the Start button is
pushed.
Detect the actuator, but it
is not there SC503: Feed start sensor
Does not detect the
actuator, but it is there SC503:
Detects paper, but there
is no paper The printed image shifts if the paper width
detection board detects the wrong paper
size. Paper width detection
board
Does not detect paper,
but there is paper The paper width detection board cannot
detect the paper size.
Detects a long paper size,
but it is not long paper Pressure is applied between the drum and
pressure cylinder after the trailing edge of
the paper on the drum, and ink will
transfer to the pressure cylinder.
Paper length sensor
Does not detect a long
paper size, but it is long
paper The image will be patchy near the trailing
edge, because pressure is not applied
near the trailing edge.
Detects the paper table,
but it is not at the lower
limit position. If the sensor does not turn off more than
7.5 seconds after the paper feed table
starts to move up, SC520 (paper feed
lock) occurs. Paper table lower limit
sensor
Does not detect the paper
table at the lower limit
position, but it is there. The paper table motor does not stop at
the lower limit position.
If the sensor does not turn off more than
7.5 seconds after the paper feed table
starts to move up, SC520 (paper feed
lock) occurs.
Detects that the top of the
stack is at the correct
height for paper feed, but
it is not. A jam occurs because the paper feed
table does not move up when the Start
button is pushed. Paper height sensor
Detects that the top of the
stack is not at the correct
height for paper feed, but
it is. If the paper table does not stop within 7.5
seconds, SC521 (paper table motor lock)
occurs.