Service manual

TROUBLESHOOTING GUIDE 1
G130/G131 4-44 SM
(From previous page)
A
No
No
All colour?
Colour missing
y Faint image (K)
Check the image transfer unit position lever.
y Cyan/Magenta jitter
Check if the registration roller speed is suitable for the type of paper used.
y Toner blasting
Check which colour is blasting and adjust the toner limit or transfer bias.
y Image density change
Check when the problem is reported and follow the necessary steps.
y Dirty Background
Check in which condition the problem is reported, and follow the required procedure.
y Colour vertical bands/lines/dirty background
Check the OPC drum and/or development unit.
y Colour shift
Check the level of the colour shift and follow the troubleshooting guide if required.
y Colour lines/bands/dirty background
When the PCU/development unit is close to its life end, the developer or the cleaning blade of the
PCU wears out, causing vertical colour lines, bands, or dirty background. Check the related colour
unit and replace it if necessary.
Considerable Symptom
Possible Symptoms
y Colour shift
Check the level of the colour shift and follow
the troubleshooting guide if required.
Check Points
y Connection of flat cable between the
controller and laser optic housing unit.
y Mirror position of related colour located in the
laser optic housing unit.
y Controller or BCU board defective
Specify the colour that caused
the image problem.
Check the image processing area of the
colour specified in the previous step
Yes
Yes
G130T502.WMFF