How to Replace Sider Cover Slider Headband Parts on Beyerdynamic Headphones

Instructions are compatible with the following models of Beyerdynamic headphones: 

DT 790 / DT 797 / DT 770 / DT 770PRO / DT 770PROHT

DT 880 / DT 880 PRO / DT 880PROHT 

DT 990 / DT 990PRO 

HS200Dyn / HS 200Rotor / HS 200Trend  

HS 400

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