C1900 What is the value

You can download the Epson printer drivers from theirsupport WEB site. Please click on this link and select your model printer todownload :-http://www.epson.com/cgi-bin/Store/jsp/index.do?BV_UseBVCookie=yes

Go to the RESET menu. The last item is Change Toner Cartridge, then find the sub-menu item for the toner you want to replace.

My belt is slipping I tighten both alan head screws to the max roughly 7 turns and still have the broblem

I don't know anything about this printer but look for a small switch where the waste box attaches to the printer. When you locate it press it in and if the "install waste box" goes out you simply have to devise some way to keep the switch pressed all the time. Try some super glue, or maybe a simple piece of paper folded up. Good luck.

transfer belt cleaner error
replace the transfer belt unit

ERROR CODE: E020
“SECONDARY TRANSFER VOLTAGE CONTACT/RELEASE PROBLEM”
Solution
�� Electric parts which can cause the trouble:
• Transfer Roller Pressure Solenoid (SL2)
• Transfer Roller Pressure Position Detection Sensor (PC7)
• Engine Board (PWB-A)

Sounds like the transfer roller or the fuser unit may be faulty. Look at the fuser to see if the roller surfaces are dirty. If so, replace the fuser.

hi this solution has already been covered in full lengths. Epson c900 and c1900 are similar. have a look at my posting on this. photoconductor reseting by Labatt in this forum. read from the start.
http://www.fixya.com/support/t146110-epson_aculaser_c900_photoconductor

I have a C1900 with an error "Service Req E021". I appreciate any help as to what this refers to please.

The Cleaner Pressure Flapper Solenoid it dead or dying. You can try moving it by hand to see if you can prolong it, but basically it needs a new one. Its a job for an engineer really.

See the image below for it's location.