Avanti gas oven

Hello,

I have an Avanti 20" gas range. It is 7 years old. Last week the oven started having problems. The broiler works fine, but the oven won’t stay lit. I have tried cleaning the oven burner. Inside on the bottom of the oven, I can see the spark, the burner fires up but then goes out when I release the knob. All the stove burners work fine. I have tried to locate a parts diagram, but have had no luck. Any input is appreciated.

Thanks.

hi I have issue with stove