Samsung Lazett Combo SCX-4216F, Service Manual

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7-13
Samsung Electronics
TROUBLESHOOTING
Service Manual
7.3.7 Uneven Density
• Description Print density is uneven between left and right.
Check and Cause Solution
1. The pressure force on the left and right
springs of the transfer roller is not even,
the springs are damaged, the transfer
roller is improperly installed, or the trans-
fer roller bushing or holder is damaged.
2. The life of the Developer has expired.
3. The toner level is not even on the devel-
oper roller due to the bad blade.
1. Replace both the left and right Spring
Holder.
2. Problem with the toner cartridge, replace
the toner cartridge and try to print out.
7.3.8 Background
• Description Light dark background appears in whole area of the printing.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause Solution
1. Recycled recording paper has been
used.
2. The life of the Developer has expired.
3. The up-to-down movement of the trans-
fer roller is swift?
4. The HVPS is normal?
(Perform Engine Test Mode diagnostic
code 4)
1. Quality is not guaranteed when using recy-
cled paper.
2. Replace the toner cartridge.
3. Clean the busing on the transfer roller.
4. Replace the HVPS.