Samsung SF6500 Service Manual page 104

7-4-13 Pale/Weak Image Quality
START
Does the trouble occur even with
another cartridge ?
Is the transfer unit O.K ?
Nomal voltage in HVPS ?
Its wiring harness O.K ?
Is the development bias connector
of cartridge O.K ?
Check LSU unit and then
replace it if necessary.
7-4-14 High Background Density (Toner in the background areas)
START
Does the trouble occur even with
another cartridge ?
Check HVPS and replace it if necessary.
Samsung Electronics
N
Y
N
Y
N
Y
N
Y
N
Maintenance & Troubleshooting
Replace the cartridge. See page 3-14.
Replace the transfer unit. See page 6-26.
Replace the HVPS or connect
the wiring harness properly.
Replace the HVPS or connect
the wiring harness properly.
Replace the cartridge.
7-19