Cover Interlock Switch Service Check - Lexmark E238 Service Manual

Cover interlock switch service check

Note: Make sure a print cartridge assembly is installed and the cover
closes all the way, engaging the cover open switch lever.
FRU
Cover interlock switch
Action
Disconnect the cover interlock cable from the
controller card at J15.
With the printer turned off, verify continuity
between cable pin 1 and pin 2 with the door
closed and discontinuity with the door open.
Verify continuity between cable pin 1 and pin 3
with the door open and discontinuity with the
door closed.
Verify discontinuity between cable pins 2 and 3
whether the door is open or closed.
• If either fails, replace the cover interlock
switch.
• If both pass continuity, turn the printer on, and
measure +5 V dc on pin 2 at J15 on the
controller card.
• Verify pins 1 and 3 at J15 are ground.
• If voltage or ground is not present, see
"Controller card service check" on
page 2-82 for more information.
Diagnostics—all models
4511-xxx
2-85