Lexmark Printer Perform the Index System, See Index Motor Service, Index System Test on, 3-2

4085-001

Error	Symptom	Action
915	Index System	Perform the “Index System
	10 Index Motor Stall or loss of	Test” on page 3-33 .
	Encoder signals	See “Index Motor Service
	20 Encoder Wheel “once-per-	Check” on page 2-56 . If
		problem still exists, go to
	revolution” sensor failure
		“Index System Test” on
	30 Unable to calibrate Analog
		page 3-33 .
	Sensor
	40 Index Motor wired backward
920	“Feed Motor” - Pick Motor stall or	See “Index Card/Sensor
	loss of Encoder signals	Service Check” on
		page 2-67 .
921	PerfectFinish™ System - Motor	Check Motor and Encoder.
	stall or loss of Encoder signals	See “Index Motor Service
		Check” on page 2-56 . If
		problem still exists, go to
		“Index System Test” on
		page 3-33 .
922	Multi-Purpose Feeder Motor -	Check Multi-Purpose
	Motor stall or loss of Encoder	Feeder Motor. See “Multi-
	signals	Purpose Feeder (MPF)
		Motor and Sensor Service
		Check” on page 2-57 .
923	“Exit System” - Cam Motor	See “Entering CE
	Homing failure	Diagnostics Mode” on
		page 3-2 .
925	“Maintenance System” -	See “Entering CE
	Maintenance Motor Homing	Diagnostics Mode” on
	failure	page 3-2 and
		“Maintenance Sled Test”
		on page 3-33 .
928	Ink Level System - Ink Float	Perform “Ink Level Sensor
	Sensing Calibration failure	Test” on page 3-31 .

Note: Many of the 930-938 are communication failures between the printheads and the carrier contacts as noted. If contact failures are suspected, check alignment between the pogo pins and printhead tab circuit. This can be done by lightly placing a piece of low tack tape on the printhead tab circuit and inserting it in the carrier. If contamination is suspected, remove the printhead and clean the contacts with a low-lint damp cloth. Clean the pogo pins only with a clean, lint-free cloth.

Diagnostic Information 2-5