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4076-0XX
12
Maintenance Station Service Check
The maintenance station has two functions:
1. Cleans the print head nozzles during the print operation.
2. Seals the print head when it is not being used to prevent the noz-
zles from drying..
Note: if the failure remains, replace the system board
FRU OR PROCEDURE ACTION
1 Maintenance Drive Assem-
bly
Disconnect J4 from the system board.
Check for 18 ohms (±4 ohms) between
pins 1 and 2 at the motor. If the reading
is incorrect, replace the maintenance
drive assembly,
Check for motor pins shorted to the
motor housing. If you find a shorted pin,
replace the maintenance drive assem-
bly. If the symptom remains, replace the
system board.
Abindinthedriveassemblycanprevent
the motor from turning. Check for binds
and loose or worn parts in the drive
assembly. Also check the motor gear
2 System Board Turn the printer off and disconnect J4
from the system board. Turn the printer
on and check for a pulse of 15 V dc
between J4-1 and ground on the system
board as the printer goes through
POST.
3 Maintenance Rocker Am. Check for binds or wear.
4 Wiper A worn wiper will cause degraded print
quality just after a maintenance clean-
ing. Check for loose or worn wiper.
5 Cap A worn cap will cause the print head
nozzles to dry and clog. Check for loose
or worn cap.