Carbon film encoder noise big how to repair?

Encoder because of the frequent use of household electrical appliances ( Such as the volume encoder in a recorder is often turned up over and over again) , use after a period of time prone to failure. Of encoder failure more easily on the machine, when the noise is very big, such as gyration encoder sound when the small, the power switch failure, etc. , this is where the encoder maintenance. Carbon film and synthetic carbon film encoder application after a period of time the most trouble is the large noise ( Special type is sealed with switch encoder) , the main reason is that the contact between reed and leading-out terminal reeds with oil, or resistive film is wear the contact resistance is not stable. When can repair according to the following steps: 1, use the screwdriver to pry open the encoder metal shell, remove the metal shielding shell; 2, dip in with tweezers clip on the presence of water ethanol ( Or use premium gasoline) Friction resistance of cotton ball, wipe gently, remove carbon powder and dirt, with a small cotton ball clear contact reed and reed joint derivation of oily be soiled. Some of the encoder contact reeds bakelite racks can be removed from the axis of soil, so it is easier to clear the oil on the reed and resistors and carbon powder; 3, wash again according to the original steps to pack good, after the completion of the repair work is finished. The above repair can not always work, wear serious encoder will need to change the new. Replace when had better choose the original model and the original value of the encoder, and should pay attention to the length of the encoder shaft and its cross section shape, should be able to cooperate with the original knob. When can't find the original model and the original value encoder, can use the right type of alternative. Shanghai electronics is 26 years old coder manufacturer, specializing in the production of various types of encoder, rotary encoder, straight and smooth encoder, rocker encoder, switch, encoders, take the motor encoder, resistance, linear and encoder handle designs and sizes are available according to customer's demand to customize, encoder models complete, can perfect replacement brand encoder, both at home and abroad to find find electronic encoder manufacturers.