Cleaning and maintenance

Note the following information when cleaning and maintaining products of the Evolution Wireless Digital series.

  1. Disconnect the products from the power supply system and remove rechargeable batteries and batteries before you begin cleaning.
  2. Clean all products only with a soft, dry cloth.
  3. Note the special cleaning instructions below for the following products.
Cleaning the sound inlet basket of the microphone module
  1. Unscrew the top sound inlet basket from the microphone module by turning it counterclockwise.
  2. Remove the foam insert.
    You can clean the sound inlet basket in two ways:
    • Use a slightly damp cloth to clean the top sound inlet basket from the inside and outside.
    • Use a brush and rinse with clean water.
  3. If necessary, clean the foam insert with a mild detergent or replace the foam insert.
  4. Dry the top sound inlet basket and foam insert.
  5. Reinsert the foam insert.
  6. Screw the sound inlet basket back onto the microphone module.
    From time to time, you should also clean the microphone module contacts:
  7. Wipe the contacts of the microphone module with a soft, dry cloth.
Cleaning the transmitter’s contacts
  1. Wipe the contacts with a dry cloth.
Cleaning the L 70 USB and CHG 70N chargers
  1. Remove all rechargeable batteries from the charging slots.
  2. Disconnect the charger from the power supply system before cleaning.
  3. Clean the product with a dry cloth.
  4. In addition, use a brush to remove dust from the charging slots.
  5. Clean the charging contacts from time to time with a cotton swab, for instance.