Lexmark 7300 Series, Service Manual, Page: 35 / 88

4418-X6X
Diagnostic information
2-15
PictBridge service check
Maintenance station service check
The maintenance station has three functions:
1. Wipes (cleans) the printhead nozzle plates
2. Provides a place for printheads to fire all nozzles, keeping them clean
for printing
3. Seals the printheads when they are not being used to prevent the
nozzles from drying
Unit/Problem Action
PictBridge
Card Check system board connector P1 for approximately
4.9 V dc on pin 1. If the voltage is incorrect, replace the
system board. Go to
“System board removal” on
page 4-14 . If the voltage is correct but the problem
remains, replace PictBridge card assembly with cable.
Go to
“PictBridge card assembly with cable
removal” on page 4-12 .
Unit/Problem Action
Maintenance
Station
Assembly As the carrier moves to the left over the maintenance
station, a slot on the bottom of the carrier engages a tab
on the sled of the maintenance station, causing the cap
to rise and seal the printheads. When the carrier moves
to the right, it uncaps the printheads. The wipers clean
the printhead nozzle plates as the carrier leaves the
maintenance station. The wipers clean the printheads
only when the carrier is moving to the right. After the
cleaning operation is complete, a tab on the
maintenance station engages a tab on the carrier,
causing the wipers to lower.
Worn wipers can cause poor print quality after printhead
cleaning. Check for loose or worn wipers.
Worn caps cause the printhead nozzles to dry and clog.
Check for loose or worn caps.
If any worn or broken parts are found, replace the
maintenance station. Go to
“Maintenance station
removal” on page 4-20 .