HP 7500A Guia do Utilizador descarregar pdf (Página 122)

Regular white streaks in the bars

If any of the color bars show regular white streaks, follow these steps:

White streaks The print quality bars have white streaks in them.

1. If the Print Quality Diagnostic report reads PHA TTOE = 0, align the printer. For more

information, see

Align the printhead.

2. "If PHA TTOE is not 0," or aligning does not help, clean the printhead. For more

information, see

Clean the printhead.

3. Print another Print Quality Diagnostic report. If the streaking is still there, but seems

better, try another cleaning. If the streaking gets worse, contact HP - the printhead

may need to be replaced.

Bar colors are not uniform

Print quality bars are not uniform The bars have lighter or darker portions in them.

If the color of any of the bars is not uniform, follow these steps:

1. If the printer was recently transported at a high altitude, try a printhead cleaning.

2. If the printer was not recently transported, try printing another Print Quality Diagnostic

report. This uses less ink than a printhead cleaning, but if it is not effective, try a

cleaning.

3. Retry the Print Quality Diagnostic report. If the colors seem to be improving, continue

cleaning. If the colors get worse, contact HP - the printhead may need to be replaced.

Chapter 8

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HP 7500A Guia do Utilizador Página 122