Sennheiser MX W1 Instructions for Use - Page 22

Problem Hum Only one earphone has audio Earphones cannot be switched on Possible cause Possible solution Interference due to charging via a USB socket of a PC while listening to music from the same PC Charge from the power supply unit or choose a different audio source Transmitter was switched on before the earphones were switched on Briefly press the transmitter's operation/pairing button ¿ Rechargeable batteries Briefly charge the have just been replaced earphones (see page 18) Resetting the transmitter to the factory settings In case of system malfunction: ̈ Use a pointed tool to press the reset button for 1 second. The transmitter is reset to the factory settings and then restarted. If a problem occurs that is not listed in the above table or if the problem cannot be solved with the proposed solutions, please contact your local Sennheiser agent for assistance. 21