3-40 magicolor 330 - Base Engine Service Manual
Primary FIPS: Error Messages
3.37 - Error Message: Call for Service Low Density
The image density readings indicate a problem.
Logic control on the MCU PWB detected that the printer image density was unusually low and attempts failed to
raise the density.
Step Actions and Questions Yes No
SUSPECT COMPONENTS
The following components are associated with this specific prob-
lem. One or more of these components may have failed partially or
completely. If you cannot isolate the problem using this FIP,
replace each component listed below, one at a time, until the prob-
lem disappears.
• Wiring and connectors linking the components
• Developer Clutch Assembly (RRP 9.117)
1DISPENSE MOTOR INSPECTION
1. Remove the Rear Cover (RRP 9.4)
2. Switch on printer main power.
3. Observe the Dispense Motor.
Does the Dispense Motor run?
Go to step 3 Go to step 2
2Replace the Dispense Motor Assembly (RRP 9.116)
Does the error message still appear?
Go to step 3 Problem
solved
3TONER CARTRIDGE INSPECTION
Remove each of the four Toner Cartridges and inspect them
for damage and contents.
Are the Toner Cartridges free of damage and are they rela-
tively full of toner?
Go to step 4 Replace the
damaged or
empty Toner
Cartridge
4Replace the ADC Sensor Assembly (RRP 9.50)
Does the error message still appear?
Go to step 5 Problem
solved
5Replace the MCU PWB (RRP 9.123)
Does the error message still appear?
Go to step 6 Problem
solved
6DEVELOPER HOUSING INSPECTION
Hand rotate the Rotary Frame Assembly and inspect the
magnet roll of each of the four Developer Housings for dam-
age and toner presence.
Are the Magnet Rolls free of obvious damage and are they
evenly coated with toner?
Go to step 7 Replace the
Developer in
the problem
Housing or
replace the
Developer
Housing Assy.
(RRP 9.59)