HP Color LaserJet 4700dtn - No Magenta

[dimm]

I have replaced Main drive assembly (no black color) and ETB (defect gear) but now after remount, is the magenta color gone :confused:. No problem with the toner cartridge i check it in Diagnostic mode.

Can somebody tell me what i have missed in the remount.
Any suggestions would be appreciated.

[redcow]

When you say it works in Diagnostic mode...do you mean "Disable Cartridge Check"?

The magenta works in another slot. Does another cartridge work in the magenta slot?

[dimm]

Yes, i change magenta cartridge with the cyan. Magenta work well in cyan slot, but no cyan output from the magenta slot. It must be something with the magenta slot.

[redcow]

Make sure that the drum motor (for magenta) is plugged in. If it is, follow the black drum motors' wires back to the DC Controller and unplug it and plug it into the magentas' connector (after unplugging magenta) on the DC Controller. At the same time put magentas' plug into the blacks' connector.
Print.
Taking an educated guess...you have a bad motor or DC Controller.

I'll stop now before I get too confused!

[dimm]

It was the black gear in the new mounted Main drive assembly RM1-1716. The gear who lift up the magenta cartridge developer part to drum, with lifters on both sides in the cartridge slot. It was in wrong direction against the cyan and yellow gear.
After 4 hours experiments the magenta was back, but i must check a manual to fine adjust the gears default position (first time i have changed the main drive assembly on 4700).

Thank for your help.

Edit: Only the gears for the black cartridge slot was mounted correctly on the new main drive. Its three dots on one gear and only one dot on the other gear. But only in one position they are exactly against each other. The hole in four of the black gears should be against the arrow when you attach the main drive in its home position. And then mount the part with the four big white gears.

[woodss]

most problems with printers are mostly mechanical, I really think experiementing and such is the best way to learn how a machine works.

Well if people read the theory of operation on their service manuals, it will give them a better understanding of how actually the machine works.

I would think its wise to take a digital photo of the area your about to work on and compare with the photo and the finished product.

I usually place the printer into imagiary grids and into segments, and that way, I dont get confused with diffrent areas and never work on more area at a time that really flips you bad.