How to Use a Multimeter to Check the Phone's Mic, Speaker, and Ringer (Loud Speaker)

 

Here, we will learn a very straightforward and simple step-by-step procedure for testing a mobile phone's microphone, speaker, and ringer (loud speaker) with a multimeter. All brands of mobile phones, including Samsung, Apple iPhone, Huawei, Xiaomi, Redmi, Oppo, LG, Motorola, Mobicel, Lenovo, Nokia, and other top brands, can be tested using the same tips and steps.

 

 

How to Use Multimeter

 

Gain confidence when performing electrical work by taking precautions. When performing DIY maintenance and electrical repairs, having multimeter skills is useful. It examines the voltages of the alternating current (AC), direct current (DC), resistance, and amperage. Test the electricity in batteries, appliances, and outlets using a multimeter. This manual will describe safe multimeter usage. Additionally, it will describe what a multimeter is, its components,

 

Safety Tip: Never touch the metal tip of the multimeter while testing with live current. You could get an electrical shock.

 

 

How to Use a Multimeter to Check the Phone's Mic and Microphone

 

A mobile phone's mic, or microphone, is a card-level component that aids in the transmission of sound during phone calls. Its alternate name is "mouth piece." The audio IC or power IC controls the microphone (UEM).

 

 

If the mic has a problem, the following issues will arise:

 

• Calls with less or no sound are also acceptable.
• Your voice or sound is inaudible to the other person.
• sound that was interrupted or changed.

 

 

Follow these steps to test or check the phone's microphone with a multimeter:

 

Maintain buzzer mode on the multimeter. Buzzer Mode is also known as Continuity Mode.

-Check the microphone's (+) positive and (-) negative.

-It must be between 600 and 1800.

-Change the microphone if the value is not in the range of 600 to 1800.

-There shouldn't be any buzzer or beep noises. If there is a beep or buzzer sound, the microphone needs to be changed because it is defective.

 

NOTE: The microphone will only be useful on one side. The opposing side won't offer anything of value.

 

How to Use a Multimeter to Test the Speaker or Ear Speaker on a Mobile Phone

 

A mobile phone's earpiece or ear speaker makes it easier to hear sound during a call. One of the audio ICs or the power ICs controls the speaker (UEM).

 

 

The following issues will arise if the speaker is unreliable:

 

Calls are silent during the call.Phone call noise has been reduced.With interruption, sound.

 

Follow these steps to test or check the speaker on a mobile phone with a multimeter:

 

-Maintain buzzer mode on the multimeter.

-Verify the speaker's (+) positive and (-) negative.

-must be 25–35 in value.

-Change the earpiece or speaker if the value is not between 25 and 35.

-There ought to be a buzzer or beeping sound. If there isn't a beep or buzzer sound, the speaker needs to be changed because it is defective.

-Change the speaker if there is less sound or if the sound is unclear during a phone call.

 

 

How to Use a Multimeter to Test or Check a Mobile Phone's Ringer, Buzzer, or Loudspeaker

 

A mobile phone or smartphone's ringer will ring or play a loud sound. Other names for it include IHF speaker, buzzer, loud speaker, and melody, among others.

 

 

If there is a problem with the buzzer or loudspeaker, the following issues will arise:

 

• There is no loud speaker or ringer.

 

• The ringer's noise will be muted.

 

• The ringer is making noise, but it is interrupted.

 

• Unclear sound

 

• No sound or music can be played from a video.

 

• During an incoming call, the phone is silent.

 

• However, the phone doesn't ring.

 

 

Use a multimeter to check or test the mobile phone's buzzer or loudspeaker.

 

 

• Maintain buzzer mode on the multimeter.

 

• Check the buzzer's (+) positive and (-) negative.

 

• must be 8–10.

 

• Change or replace the ringer if the value is not within the range of 8 to 10.

 

• There ought to be a buzzer or beeping sound. A faulty ringer needs to be changed if there is no beep or buzzer sound.

 

NOTE: If the ringer is making less noise, switch it out immediately.