NT
lessly. On re-use they both have abysmal & unusable print quality, the cont rast is shot with grey patches all over the place. Is this normal in this t ime frame? Or must it be due to chemical exposure?
They're old HPs.
NT
snipped-for-privacy@gmail.com brought next idea :
Not normal. My HP 4000, with all the add-ons, has sat more or less unused for 10 years. It gets fired up maybe every few months, to print an occasional page and the output is always flawless. What does deteriorate over many years, is paper handling rubber rollers.
that's what I thought. Thanks.
NT
Where did they sit during the period of unuse? Did they experience any extremes of temperature?
Have you removed the toner cartridges and given them a good shake to re-distribute the toner?
We have an old Samsung monochrome laser printer that was retired when we bought a networked, colour, laser printer. For a few years it was stored in the shed, but when it was next used, the prints were awful, with patches and streaks. Nothing we tried improved it, except replacing the toner cartridge (and integral drum). It has printed perfectly for the last 18 months and our eldest son uses it to avoid coming down stairs for every printout.
SteveW
There might be condensation which needs drying out. Also possibly dust on the window through which the laser shines. The toner cartridge might need a good shake.
lawlessly. On re-use they both have abysmal& unusable print quality, the c ontrast is shot with grey patches all over the place. Is this normal in thi s time frame? Or must it be due to chemical exposure?
Temperature kept within 18-28C. No excessive damp or dust. Ammonia has been used in their vicinity, I suspect this is the culprit.
NT
RH is under 40% so it's not damp. I'll try shaking the cart up. thanks.
NT
sounds like contaminated drums
Well several things really. Where have they been stored. What is the state of the toner, could damp have got in? The drum is often part of the toner cart so try a new one. The corona wires can and do get corroded as well and of course the high voltage generator could have been compromised by damp or merely by deterioration of capacitors in the power supply.
Brian
WEll, not so sure about amonia, since its hard to tell the concentration but if the aer was breathable by us, I'm think its unlikely to be the cause. Brian
Since nobody has mentioned it yet, have you put new paper in? I have taken an HP laserjet out of the cupboard after 5 years and had it print flawlessly, so something has deteriorated in your case. Most likely is the paper.
Give it a good clean. Failing that, try a new toner cartridge.
Really? That used to happen with thermal fax rolls, but laser and inkjet printers will pretty much work with any old paper.
99% certain the drum is damaged. Try cleaning with alcohol, but expect to replace it.
But with HP that's upgraded with new toner.
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