3LCD
Sanyo is one of the largest providers of LCD projectors to the commercial market and they make a darn fine product in that arena. It's NOT a home theater projector, but a business projector of some sort.
Somewhere on it is an actual model number.
PLC-XTxxx or something of that nature.
That tells you what you actually own. The 3LCD part is just to let you know that you have a 3LCD projector instead of a LCoS or DLP projector. That is, the imaging technology is LCD, which is a great product for the business environment especially.
Anyway, once you have a projector model, you can likely find an owner's manual over at Projector Central if you need it.