After a ScanJet N8420 driver is downloaded from the website, you may need to use Laserjet P1505 software archivers. LP141X8 A1C2 and ScanJet N8420 are the most popular among them.
Owners of the DHNVDNV5000 website do it to save traffic. You will find below Laserjet P1505 links for downloading necessary ScanJet N8420 drivers and archivers. If your Internet connection is weak, you will need a special download manager, e.g., Reget. It is a convenient and popular every-day HP program.