5-20 magicolor 330 - Base Engine Service Manual
Primary Fault Isolation Procedures
5.9 - SpotsPROBLEM
There are spots of toner scattered randomly across the page. THE PRINTER DISPLAYS
NO ERROR MESSAGE.
• MCU PWB (RRP 9.123) • 2nd BTR Assembly (RRP 9.78)
• Waste Toner Sensor (RRP 9.53)
• Toner Cartridges (RRP 9.55, 9.56, 9.57, and 9.58)
• Developer Fan (RRP 9.122)
Step Actions and Questions Yes No
1
PAPER HANDLING ASSEMBLY INSPECTION
Slide the Main Paper Handling Assembly out of the p rinter and
inspect the top of the Registration Chute A ssembly.
Is the top of the Registration Ch ute Assembly free of t oner?
Go to step 2 Go to step 9
2
XEROGRAPHIC CARTRIDGE INSPEC TION
Remove the Xerographic Cartri dge (RRP 9.48 ) and inspect the exte-
rior of the Cartridge.
Is the exterior of the Xerographi c Cartridge clean a nd with no
obvious toner leakage?
Go to step 3 Go to step 9
3
DEVELOPER ASSEMBLY INSPECTION
1. R emove the Top Cover (R RP 9.3).
2. Turn the Rotary Frame and inspect the four Developer Assem-
blies.
Does each Developer Assembl y a p pear clean, with any obvious
toner on the exterior of the Assembly or falling from the Magnet
Brush
Go to step 4 Clean the dirty
Developer
Assembly. If
the problem
reoccurs,
replace the
faulty Assem-
bly
4
FUSER INSPECTION
Slide the Fuser Assembly out of the printer and inspect th e Assem-
bly.
Is the Fuser Assembly free of toner?
Go to step 5 Clean or
replace the
Fuser Assem-
bly (RRP 9.80)
5
BELT CLEANER INSPECTION
Remove the Belt Cleaner Assembl y (RR P 9.76) and inspect the
Assembly.
Is the Belt Cleaner Assembly clean and with no obvious toner
leakage?
Go to step 6 Replace the
Belt Cleaner
Assembly
(RRP 9.76)
RS509X