Samsung ML-3471ND - All black printing

Reference Information
Samsung Electronics
Service Manual
7-19
7.6.14 All black printing
YES
No
Yes
No
All black printing while printing
Check if OPC Drum have
all black toners on the
whole surface after
warming up?
Replace the Frame ass'y
Is there still remaing the
problem?
Replace the HVPS
Replace Toner Cartridge
End