Drop detect sensor, part of the service station. It's a slot to the right of the capping area. It works by looking across the gap with IR light and a reciver on the other side and when ink sprays down into it the drops cause a break in the light so it knows if a cartridge is spraying but that area can clog. You need to run some swabs down the slot and clean the excess out. Also in the menus you can turn cartridge checking off and when you see the ink is weak you change whichever is bad.
BTW the 600/650C line is one of the biggest "no longer available" machines there are now, HP wants to make them obsolete by lack of parts sources. You can find parts like belts, service stations, etc but you have to be patient and scour ebay regularly. Last belt I got I had to get from England. -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] Behalf Of da River Sent: Sunday, October 28, 2007 9:50 AM To: [email protected] Subject: [HPDesignJet_Printers] DJ 650C....Bad cartridges?? When my DJ 650C goes thru the alignment and POST it says to replace the yellow cartridge, so I did. Replaced with a brand new one and still says that it is bad. Also have the same problem with a DJ 600 ...except it doesn't like the right hand cartridge..a number 26 black. I have tested the trailing cables and they seem fine. Any other things to check?? Thanks for the help.
