Philips Garbo Matchline projector dead

sweet smell from an electrical appliance is ozone cause fir high voltage discharge ( like the sweet smelling air after a lightning strike
take it in for a proper diagnosis

That is a problem with the lamp. Replace it with a known good one.

First check your electrical panel breaker before calling for service.

Get the manual here:
Garbo Matchline LCD Projector LC7181 User Manual

mine is doing the same.... any solution to fix this problem?

make sure the lamp door is engaging the safety switch. if it is then the a/c input board is bad or the power supply.

Two possibilities:

1. projector probably too close to the screen
or
2. The focus ring at the end of the lens must be manually turned (hard to find if you don't know it's there).

I have a great deal of experience with that projector in particular. 
The burning smell along with the circle on the screen can be one of two thing in the same general area. Both are not good.
The lamp assembly has its own dedicated cooling fans. these fans can sometimes **** in dust and insects. the lamp runs at a very high temperature and can burn those things quickly. I have often found old lamps with particles fused to the glass.
The other situation is that the lamp burned something and it got stuck to the glass somewhere in the light path. 
if I remember right the projector monitors the temprature of the bulb and will shutdown if it gets too hot.
Runco is based in california and has a great turn around time on projectors. Unfortunately with Runco you would be hard pressed to find a technician that wouldn't just send it to them for repairs anyways. The major down side with Runco is that customers cannot talk directly to engineers or service men. 
Locate a Runco authorized retailer in your area, check runcoes site. and give them a call to see if they cant send it to runco for you. if you cannot find one in your area call Roscor or Blair & Associates in Chicago.

Your problem is most likely your Blue and Green lens' inside the light engine. It's not something you can replace yourself. I worked for Philips for 14 yrs. repairing the LCD projectors the last 6 Yrs. Call philips and get the number of an ASC in your area that has repaired projectors.

they have a fuse on the power board inside the projector itself, But normally the fuse does not go bad unless their is a dead short in the unit.