Service manual

PROCESS CONTROL ERROR CONDITIONS
SM 4-3 G130/G131
Trouble-
shooting
4.1.2 PROCESS CONTROL SELF-CHECK RESULT
SP3-975-001 (Process Control Self-check Result)
No. Result Description Possible Causes Action
0
Not
performed
Process control self-
check is not done.
- Do the process control
self-check again.
1
Successfully
completed
Process control self-
check successfully
completed.
- -
2
ID sensor
adjustment
error
Vsg cannot be
adjusted within 4.0 ±
0.5V.
1. Dirty ID sensor (toner,
dust, or foreign material)
2. Dirty transfer belt
3. Scratched or damaged
transfer belt
4. Defective ID sensor
1. Clean the ID sensor.
2. Check the belt
cleaning. Clean or
replace the transfer
belt.
3. Replace the transfer
belt.
4. Replace the ID sensor.
3
Vmin error Vmin is not within
the specified range.
Vmin is calculated during the self-check. Even when
the calculated Vmin value is out of the specified range,
an optimum value is automatically used instead.
Therefore, this error code does not usually occur.
If no problem is observed with image density and/or
development gamma, nothing needs to be done.
If an image problem such as low image density is
observed, check the following points:
Transfer belt / Belt guide plate / ID sensor
4
Sampling
data error
Not enough data can
be sampled.
5
Gamma
error
Gamma is out of
range.
0.3 > Gamma, or
6.0 < Gamma
6
Vk error Vk is out of range.
-150 > Vk or 150 <
Vk
1. ID sensor pattern
density is too high or
low.
2. Residual image on
transfer belt
3. Toner dropped from
development unit
4. Scratched or damaged
transfer belt
1. Check the image
development process
and correct toner
density if necessary.
2. Check the transfer
belt-cleaning unit.
3. Clean the development
unit and correct toner
density.
4. Replace the transfer
belt.
7
Vt error Vt is out of range.
0.5 > Vt or 4.8 < Vt
1. Development unit not
correctly installed.
2. Toner density is too low
or high.
3. TD sensor defective.
1. Check.
2. Check and/or correct
toner density.
3. Replace development
unit.
8
Sampling
data error
during LD
power
correction
Not enough data can
be sampled during
the LD power
correction (if “LD
Power” is set in SP3-
125-002).
See the possible causes and action for error codes 4,
5, and 6.
9
Forced
termination
Process control self-
check was forcibly
terminated.
A cover was opened or the
main switch was turned off
during the self-check.
Do the process control
self-check again.