Microwave broke and Landlord asking me to pay half

[Krishna Chaitanya gadhiraju]

Hello,

I am staying in an apartment and microwave stopped working. Landlord is saying, it would cost 300$ and I have to pay half as per lease contract. As per lease contract I have pay for repairs upto 150$. But my contention is this is replace and not repair. I can't pay for appliances that's provided by landlord.

could you please help me here.