How to Fix iPhone 7 Vibrator Not Working | Chip Level Repair

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There are 2 factors can cause iPhone vibrator not working: software or hardware issues. If the vibrator still not work even though you tried software troubleshooting and resetting, it’s normally the hardware issue. In this article, we share how to troubleshoot and fix iPhone 7 vibrator not working via chip level repair, hope you enjoy our sharing.

Step 1 Function Test

Power on the iPhone, move the ringer switch located on the side of the iPhone on and off, the iPhone doesn’t vibrate. Launch Settings>Sounds, open Vibrate Mode on both Ring and Silent, play the ringtone, the iPhone has no vibration

Step 2 Diagnosis

Measure the diode resistance of charging connector J4101 pin 40, 41, 43 and 44, the diode resistance showed normal. Measure the diode resistance of boost converter capacitor C3537, the diode resistance showed short circuit. As there is neither corrosion or burnt on the boost converter capacitor, therefore the reason that caused short circuit is the vibrator driver IC U3502 failure.

Step 3 Troubleshooting & Repairing

Use the hot air gun to remove the vibrator driver IC U3502 and replace with a good new one. Measure the diode resistance of capacitor C3502 again, the resistance is measured normal.

Step 4 Reassemble & Test

Reassemble and power on the iPhone, test the ringtone and vibration, both ringtones and vibration work well, repair completed.

Please refer to below detailed video:

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Tools and Materials Used in This Video:

Microscope

Multimeter

Motherboard fixture

Tweezers

Solder flux

Hot air gun

Rosin

Soldering iron

Desoldering braid/ solder wick

PCB cleaner

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