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Things You'll Need
Instructions
Open your K40 microphone by unscrewing the binding screws found under the microphone head and examine it for visible damage. Look for bulging, discolored or visibly burnt components.
Compare the damaged component's place in your K40 microphone to the schematic included with the service manual and make a list of the types and specifications of damaged components. The K40 uses non-specific diodes, resistors and capacitors. Use the service manual schematic as a parts list for your damaged components.
Purchase replacement components from a retail or Internet distributor. Digi-Key Corporation, Centerpointe Electronics and All Electronics offer the 250k, 240k, 100k, 5k, 4.7k and 1m Resistors, In4608 and In4001 diodes, 0.1 and 0.001 capacitors, microphone and amplifier components which make up the K40 microphone.
De-solder the damaged components by applying heat from your 25-Watt soldering iron to the soldered joint of the component on the back of the circuit board and pressing the solder wick to the molten solder. Remove the damaged components from the K40 Microphone's circuit board.
Solder your replacement components into place by heating the connectors with the tip of your 25 Watt soldering iron at the joint of the circuit board and the connector for one to two seconds. Once the component connector is heated feed a small amount of your rosin core solder between the head of your soldering iron and the joint. Repeat this process for all component joints.