HP LaserJet 4300 Series Spezifikationen PDF herunterladen (Seite 334)

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314 Troubleshooting Q2431-90912

Table 57. Specks or dots

Possible cause Recommended action

Specks

Specks might appear on a page after a jam has been cleared. Print two to three more pages and see if

they disappear.

There is dirt in the printer. 1. Print a few more pages and see if the problem corrects itself.

2. Clean the inside of the printer (see chapter 4)

3. Process a printer cleaning page. See “Running the cleaning

page manually” on page 56.

The print cartridge has damaged

components.

● Perform the half self-test functional check (see “Half self-test

functional check” on page 310). If the problem developed on the

print drum, replace the print cartridge.

The media does not meet specifications

or is not stored properly.

1. Turn over the stack of media in the tray. Also try rotating the

media 180 degrees.

2. Check the media for type and quality. Replace the media,

and advise the customer to use the HP recommended

media and to store it correctly. See “Paper specifications” on

page 9.

The fuser rollers are worn out.

● Replace the fuser. See “Fuser” on page 162

Dots (in the paper path direction)

The static eliminator teeth are dirty. ● Clean the static eliminator teeth with a small brush or

compressed air.

Poor contact between the static

eliminator teeth and the power supply.

● Clean the contacts, if they are dirty. If the problem persists after

cleaning, or the contacts are damaged or deformed, replace

them.

The transfer roller is deformed or

deteriorated.

● Replace the transfer roller. See “Transfer roller” on page 138.

The power supply is defective.

● Replace the power supply. See “Power supply” on page 188.

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