Zebra Technologies S600, S400 manual Then cycle the power on/off switch

Symptom	Diagnosis	Action
	Parameters are set	Reload the factory defaults (see “PAUSE
	or saved incorrectly.	Key Self Test” on page 58 and “FEED Key
		Self Test” on page 59), calibrate the printer,
		then cycle the power on/off switch.
Changes in parameter settings did not
	If problem	Call a service technician.
take effect.	continues, there
	may be a problem
	on the main logic
	board.
When using wide ribbon (over 2.4"), the	Too much back-	See “Loading the Ribbon” on page 15 to
image gets lighter or smears near the	tension on the	adjust the ribbon supply spindle to provide
end of the roll of ribbon. Ribbon	ribbon.	low tension.
appears to slow down or stop.
	Communications	Print configuration label and verify that the
	parameters are set	host computer and printer settings match.
	incorrectly.	If they do, perform the MODE Key Self Test
		and check for format or overrun errors. If
		they do not, see “Communicating with the
		Printer” on page 24.
ZPL was sent to printer, but not	Prefix and delimiter	Set the characters in the printer to match
	characters set in	the ZPL format.
recognized. The DATA LED remains	printer configuration
off.	do not match the	Check configuration printout for correct
	ones sent in the ZPL	characters.
	label formats.
		If problem continues, check the ZPL format
		for changed ^CC, ^CT, and ^CD
		instructions.

Zebra S400 & S600 User’s Guide 49