Looking for a part for Lanier 5813 (Ricoh Aficio 6513)

Check this out. Here you can download the manual, drivers and also
get support services.

http://www.ricoh-usa.com/products/product_details.aspx?cid=2&scid=3&pid=2219

There's a video showing how to clear SC error codes: Resetting Ricoh Savin Lanier SC Error Code There's also a discussion here: Thread Ricoh Aficio 220 error SC392

search driver
try this driver but idk if it work on windows 7
or you can buy an old PC and put Windows XP or Linux on it
or the last solution is to change printer(not the best)

Your Gestetner A045 is made by Ricoh. I will be a lot easier finding a Ricoh dealer than a Gestetner one. Here are the equivalent models for your machine. That is, any dealer listing that they service Ricoh, Savin, Lanier or Gestetner should be able to service it.
Your machine is the same as:
Ricoh Aficio 240W
Savin 2400WD
Lanier LW310
Good Luck and Thank You for using Fixya.
WheatlandServices

this is a corona leak could be a broken or dirty corona wire

The ID sensor is located under OPC drum.Clean the optics component,the charge corona ,and see if the OPC drum is good(change every 120000 copies).

Hello sir; the error code you display is toner senser problem, now the first thing you have to do is make a full color copy find out which color missing then pull out developer unit from missing color the senser right underneath, replace it.

Should be on the back cover.

the proplem solved by adjusting the the home position of the trans fare belt cleaning unit .

toner density sensor is located in the developer unit. either the sensor is not reading cause something is covering it or it has poped so it can not reference any longer.