Lexmark Jetprinter 4079-00 series Service Manual page 41

4079-00X
Keep the assembly on a level plane while servicing with the black
cartridge end slightly elevated. Cover any open ink lines with absor-
bent cloth, secured with a rubber band, when possible.
FRU
1 Ink Cartridge
2 Logic Board
3 • Sensor Cable
• Ink Cartridge
Sensor
Action
The error code should indicate which cartridge is
suspected. Check the ink cartridge detection resistor
pad (top left of each cartridge). The resistance
should be 15K to 25K Ohms. If the resistance is
incorrect, replace the ink cartridge.
Disconnect the CNID connector from the left con-
nector card. With the ink cartridge installed, check
the resistance between the pins designated for each
cartridge sensor (pins 1 and 2; 3 and 4; 5 and 6; 7
and 8). Pin 9 is not used. The resistance should be
15K to 25K Ohms. If the resistance is correc t,
replace the logic board, left connector card, and left
connector cable.
If you replace the logic board, go to the
Adjustment Mode" on page 4-4
position adjustment, and the direction offset adjust-
ment.
Remove the ink cartridge assembly. Check the conti-
nuity on the sensor cable. Match pin numbers at
both ends of the cable.
If the continuity is correct, replace the ink cartridge
sensor. If the continuity ius incorrect, replace the
sensor cable.
"Service
and perform the print
Diagnostic Information
2-23