3 - 6
Chapter 3. Troubleshooting
Identifying Print Defects
Serious Raggedness
Dried ink buildup that is not promptly removed,
or contamination deposits on the orifice plate will steadily reduce the print
window until it eventually becomes impossible to get good print.
Swabbing and print window adjustment should eliminate serious
raggedness (see the top pattern in Figure 3.4). If cleaning and printhead
adjustment fail to correct the problem, replace the printhead.
Buildup / Missing Print
After a shut down, or during intermittent
operation, dried ink residue builds up and causes a defect that resembles
phase defect. Figure 3.4 shows this defect on a series of four pieces
printed at 130 volts and 41 phase counts. The defect may diminish during
operation as the dried ink dissolves. A milder form of buildup causes
‘startup raggedness’ or generally poor print quality without missing print,
usually on the first few pieces printed. Scheduled cleaning (wiping the
catch pan and eyelid seal) should reduce or eliminate buildup, missing
print, and startup raggedness.
Figure 3.4
Buildup-caused missing print, sample test pattern
Summary of Contents for VERSAMARK DP7122
Page 1: ...Kodak Versamark Inc KODAK VERSAMARK DP7122Printer Operator s Guide ...
Page 2: ......
Page 3: ...KODAK VERSAMARK DP7122 Printer Operator s Guide Block 3 Mod 11 ...
Page 8: ......
Page 24: ......
Page 37: ...3 7 Chapter 3 Troubleshooting Identifying Print Defects Figure 3 4 continued ...
Page 44: ......
Page 56: ......
Page 61: ......