Gestetner G060 Service Manual page 487

Possible causes of errors in the line position adjustment
Possible Cause
1 The pattern does not reach the proper density.
1. Dirty ID sensor (toner, dust, or
foreign material)
2. Incorrect toner density
Low: ID sensor cannot detect the
pattern lines.
High: Lines may be partially blank
due to improper toner density
and/or paper transfer current.
3. Incorrect transfer current
2 The ID sensors are affected by electrical noise or dirt/damage on the transfer belt.
1. Scratched or damaged OPC drum
2. Scratched or damaged transfer belt
3. Dirty transfer belt
4. High voltage leak in transfer unit
5. Residual image on transfer belt
6. Toner dropped from development
unit
7. Carrier dropped from development
unit
3 The transfer belt is covered with toner.
Development does not work properly.
4 None of the patterns are developed.
Development does not work properly.
5 Some of the patterns are not developed;
Development does not work properly.
6 The machine is not in the condition to execute the line position adjustment;
The machine is in the toner near end
or end condition.
The machine is not ready to do the
line position adjustment manually from
the user menu.
Line position adjustment cannot be
done due to failed potential control.
7 The MUSIC CPU is abnormal (1)
No error code is displayed. However,
the machine keeps displaying
"execution" on the screen.
In addition, the green LED on the
BICU stays on or off under the
following condition.
1. The MUSIC CPU resets due to
electrical noise generated by a high
voltage leak on a damaged OPC
drum.
SM
PROCESS CONTROL ERROR CONDITIONS
Possible
Error Code
04, 05, 06, 07, 1. Clean the ID sensors.
08, 09, 10
2. Correct the toner density.
3. Correct the transfer current.
02, 03, 04, 05, 1. Replace PCU
06, 10, 11, 12
2. Replace transfer belt
3. Clean or replace transfer belt
4. Fix the high voltage leak
5. Check transfer belt cleaning and
clean the belt
6. Clean the development unit and
adjust the toner density
7. Clean the development unit and
adjust the toner density
All error codes Check all units and high voltage
cable connectors.
09, 04 Check all units and high voltage
cable connectors.
07, 08 Check all units and high voltage
cable connectors.
13 Replenish toner.
17 Wait until machine becomes the
ready condition from the energy
saver or auto off mode.
18 Fix the problem causing the potential
control error.
-
1. Fix the bias leak and/or replace
PCU
4-5
Action
G570