Epson 4100 manual Print Quality Problem Probable Cause Solution

114 Troubleshooting

TROUBLESHOOTING CHART, CONTINUED

Print Quality, continued

Problem	Probable Cause		Solution
Scanner Will not Read	1.	Barcode Density Too	1. Set density in configuration
Barcodes		Low	menu to 100 dpi (Page 91).
			2. Re-adjust vertical alignment in
	2.	Vertical Misalignment	configuration menu (Page 93).
		During Bi-Directional	If necessary, turn off bi-
		Printing	directional printing in
			configuration menu (Page 73).
			3. Replace ribbon (Page 100).
	3.	Worn Out Ribbon	Try double strike printing
			(Page 91).
Scanner Will not Read	1. See “Scanner Will not Read Barcodes” above
PostNet Barcodes
	2.	PostNet Mode (text	2. Prefer PostNet text mode.
		versus graphics)	(See Appendix E.)
Italics (Epson Emulation)
Printout is ALL (or partly)	Characters used are from		Use data bytes 32-127 for upright
Italics and Should not Be	the Upper Half of the		characters and 160-255 for italic
(Both Parallel and Serial	Character Set		characters.
Interfaces)
Printout is ALL (or partly)	Operating Systems Such		In configuration menu, change the
Italics and Should not Be	as UNIX Routinely Use		number of data bits in “Serial
(Serial Interface Only)	Characters in Upper Half		Options” from 8 to 7 bits.
	of Character Set
Print Positioning
Margin Drift	Belt Too Loose or Motor		Call for service.
	Failure
Print Shifts Right or Left	Carriage Belt is Slipping		Call for service.
Until Carriage Hits	At Belt Clamp
Bumper
Entire Paragraphs Print	No Line Feeds From Host		In configuration menu, change
Out on One Line			"LF on CR" from "Off" to "On".