White Spot - Samsung ML-920 Service Manual

White Spot

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Is it regular
interval of 95mm?
YES
Obstacles stuck on OPC's
surface
-> Clean the OPC and
machine or replace
developer
When putting in/out the
developer, scratch is made
-> Replace the developer
Samsung Electronics
NO Transfer
voltage is normal?
YES
D/R in developing unit has
the defect
-> Replace the developer
Too high voltage supplied
NO
due to the setting error of
transfer voltage
-> Adjust/replace HVPS
Troubleshooting
4-28