02 nissan maxima audio balance ?

ok so i have a 02 nissan maxima SE and i need to know how to change the audio balance becuase sound is only coming from the left. I know for sure i mistakenly made the balance to the left. So right has no sound. Unfortunatly my display for the cars audio keys dosnt work. So can i please have a step by step intructions on how to navigate to balance and change it to middle? please!!, im in desperate need of help!