A blown carriage belt can ruin your day and turn your plotter into a giant boat anchor!
I explain this to many callers every day...with the 400 and 700 series Designjet the original carriage belts are just at the age where the rubber is sure to break down in the near future. Just like hoses and belts on classic cars, they must be replaced. There is one sure way to know if you are looking at buying an older HP Designjet: Look for little black fragments on the silver floor under the belt. It may look like a mouse has been in there...or it may just have a fine black dust. If you have black dust, you probably still have a number of plots you can run...if you have black chunks, don't expect to finish a plot without having your carriage belt blow up, ok?
Someone called today having trouble printing out their PDF's to scale...Here's the best thing I could find on this -- an online step by step with screenshots from the Planning Portal Director -- "Printing Correctly Scaled PDF's"
All Designjets need occasional lubricating...if you can't remember when the last time was that you "oiled" the rail...well, it is time to do it again. Turn the machine off, place 3 drops of oil on the front and back slider rail, then move the carriage all the way up and down the rail 2 or 3 times.
Special Note for 450C and 430's:
If after loading a roll of paper and printing a print, the ALIGN MEDIA light comes on and won't quit...but your media really doesn't need aligning, it is probably time to put a couple drops of lubricating oil on the silver rail that the carriage rides on. I've seen this error twice recently. It is often caused by increased resistance as the carriage rides left to right...these machines are very sensitive to the rails getting dry and causing some drag...it is easy and cheap...give it a try. You can use any "tri-flow" type of oil or plain old mineral oil.
I write about common problems with older HP Designjets. I'm always available 10am to 10pm CDT to answer your questions!
# 40 Refilled Ink
5188-6700, C3190-60095, C4705-60082, C1633-40082 C2990A, C2991A 5063-1257 C2951A, 5063-1256, C2913A, 17302A, 31391A C4713-60181, C4713-60182, C3180-60012, A6144-63008, C4699-60082, 51644CA, 51644CE, 51644CL, 51640A, 51644C, 51644M, 51644Y, 51640AA, 51640AE. 51640AL, 51644MA,51644ME, 51644ML,51644YA,51644YE 51644YL, C4713-40038, C4699-40003,C4699-40004, C4699-00015,C3190-60082, C4699-40005,C3192-60001, C4699-60078,C3174-40011, C3876A, C3886A,51642A, C4696-60006,C3190-40029, C4704-60095,C3190-40041, C3190-40052,J3258-61041, J2591-69001, J2594-69001, J3258B, J2591A, J4102B, J2590A, J4101B, J3264A, J3265G, C3190-40045, C3178-00030, C4705-00017, C4696-60007, C6074-60460, 6040-0858, C3146-67901, C4699-60074, C4699-69039, J3265-69001, J2382-69003, J4102-69022, J2592-69001, J2590-69001, C4699-60064, C3190-60145, C4699-00008, C4699-60020, C4699-60011, C4699-60015,C4699-60014, C4699-60017,C4699-60018, C4699-60012,C4699-60019, C4699-60016,C4699-60013, C4699-60081,5188-5676, 0957-2340,0950-2623, C4699-60003, C3190-60132, 5183-5268,5184-2833, C3190-60096, C4699-60042, C3174-60013,C3190-60140, C3190-60142,C4713-60123, C6072-60286,C3174-60005, C4699-60002,C3190-80010, C1633-80005,C3192A, C4713-60098