Lexmark E238 Service Manual - Page 117

4511-xxx 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 2-85