Specifications

iPhone 4 Symptom Charts — Sound Issues 78
2012-02-21
Headphone Microphone Issues
Known-Good Parts & Materials Required: Apple Earphones with Remote and Mic, Dock
Connector to USB Cable, computer running the latest version of iTunes with a known-good USB
port
Quick Check
Symptoms Quick Check
• No audio from headphone
microphone
• Distorted sound from
headphone microphone
1. If issue is with device microphone, jump to
Microphone Issues.
2. Verify that the headphones are fully inserted
into the headphone jack. Make sure a case or
protective lm is not interfering.
3. On the device, go to Settings > General >
Software Update to verify device has the most
up-to-date software. If unavailable, verify by
plugging the device into iTunes.
Deep Dive
Check Result Action
1. Clean the device.
Check that headphone jack
is not obstructed with lint or
debris. Attempt to clean any
debris in accordance with the
Cleaning Procedures.
Are you able to clean the
device?
Yes Go to step 2.
No Determine if the issue is caused by
accidental damage. Refer to the Visual
Mechanical Inspection guidelines.
2. Retest the device.
Open the Voice Memos
app. Using the headphone
microphone, create a recording
and play it back.
Did the audio record as
expected?
Yes Issue resolved.
No Go to step 3.