Microphone

Microphone Technical Characteristics

The microphone in a smartphone is a crucial component that allows the device to capture audio. Below are its primary technical characteristics:

• Type: Electret Condenser Microphone (ECM)
• Frequency Response: 20Hz to 20kHz
• Sensitivity: -42 dB ± 3 dB
• Signal-to-Noise Ratio (SNR): 60 dB
• Impedance: 2.2 kΩ
• Operating Voltage: 1.5V to 10V
• Directivity: Omnidirectional
• Dimensions: Diameter 6mm, Height 2.2mm

Instructions for Replacing Microphone

Tools Needed

• Precision screwdriver set
• Plastic opening tools
• Spudger
• Antistatic wrist strap
• Replacement microphone
• Soldering iron and solder
• Isopropyl alcohol and cotton swabs
• Tweezers

Step-by-Step Instructions

Preparation

• Ensure the phone is powered off completely.
• Wear an antistatic wrist strap to avoid any static damage to the components.

Disassembly

• Remove the SIM card tray using an ejector tool or a small paperclip.
• Remove screws from the bottom of the phone using the appropriate precision screwdriver.
• Use a plastic opening tool to gently pry the back cover off. Be careful not to crack or bend it.
• Disconnect the battery connector using the spudger to avoid any electrical damage during the repair.

Locating and Removing the Microphone

• Locate the microphone on the motherboard. It is usually a small, metallic component.
• Use the soldering iron to carefully desolder the old microphone. Be cautious not to heat nearby components excessively.
• Clean the solder pads with isopropyl alcohol and a cotton swab to ensure good contact for the new microphone.

Installing the New Microphone

• Position the new microphone on the cleaned solder pads.
• Solder the new microphone into place using the soldering iron and a small amount of solder. Ensure that the solder joints are secure and there are no short circuits.
• Allow the solder to cool before proceeding.

Reassembly

• Reconnect the battery connector.
• Gently press the back cover onto the phone and ensure it snaps into place securely.
• Reinsert the screws at the bottom of the phone.
• Reinsert the SIM card tray.
• Power on the phone and test the new microphone to ensure it is functioning correctly.