Sony MDR-RF920RK Operating Manual - Page 11

The effective areas of the transmitter The optimum distance is up to approximately 46 m (150 feet ) without the system picking up some interference. However, the distance may vary according to the surroundings and environment. If the system picks up some noise while using it within the above mentioned distance, reduce the distance between the transmitter unit and the headphones, or select the other channel. Notes • When you use the headphones inside the effective areas of the transmitter, the transmitter can be placed in any direction from the listener. • Even within the signal reception area, there are some spots (dead spot) where the RF signal can not be received. This is a characteristic inherent to RF signals, and does not indicate malfunction. By slightly moving the transmitter, location of the dead spot can be changed. Replacing the ear pads The ear pads are replaceable. If the ear pads become dirty or worn out, replace them as illustrated below. The ear pad is not commercially available. You can order replacements from the store where you purchased this system, or at your nearest Sony dealer. 1 Remove the old ear pad by pulling it out of the groove on the housing. 2 Place the new ear pad on the driver unit and insert the edge of the pad into the groove as illustrated. Make sure that the entire edge of the ear pad is securely inserted into the groove. 11GB