Hello,
unfortunately I see there is no bidder from Singapore...
I am from Romania and I can help you with some advice only.
So, you have a multifunction color laser equipment, made by Ricoh as Machine Type D027 / D029 (speed is different) and sold under different brands:
Ricoh Afficio MP C4000 / 5000
Gestetner MP C4000 / 5000
Lanier LD540C / LD550C
Savin C4040 / C5050
I have Service Manual for this equipment and my experience as service engineer. I currently sell and repair computers, printers and other office equipment: HP, Canon, Panasonic, Lexmark and other brands.
If you think I can help, I consider only 1 hour (max 2 hours if necessary).
Best regards,
Mihai