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AFTERMARKET SOLUTION

iPad Air Touch Screen Partially Unresponsive Repair
Jan 10th, 2018

iPad Air touch screen partially unresponsive? Replace with a new touch screen and the
problem remains unsolved? It’s time for you to check our repair guide and get refreshed
with a totally new logic board solution regarding the unresponsive touch issue.

iPad Air Touch Screen Partially Unresponsive Repair

iPad Air Touch Screen Partially Unresponsive Repair

The iPad turns on normally. Run touch function test – touch failure appears.

iPad Air Touch Screen Partially Unresponsive Repair

Disassemble the iPad and remove LCD and Touch Screen Digitizer. Replace with a new Touch Screen Digitizer.

iPad Air Touch Screen Partially Unresponsive Repair

Then power on and test. Touch failure still exists. We can see that touch failure appears mainly on one specific area.

iPad Air Touch Screen Partially Unresponsive Repair

Take down LCD and Touch Screen Digitizer. Remove screws and detach battery.

iPad Air Touch Screen Partially Unresponsive Repair

Switch to diode mode and measure the resistance between J6640 and grounding, J6620 and grounding. Resistance value between J6640 and grounding is normal. Measured resistance value between 35# of J6620 and grounding is 293. Measured resistance value between 33# of J6620 and grounding is 384. Abnormal value for the two Pins. Normal value should be 690. Since 33# and 35# of J6620 connect with U6650 directly, we can conclude that U6650 broke down.

iPad Air Touch Screen Partially Unresponsive Repair

Stick connectors next to U6650 with high temperature adhesive tape to protect them from high temperature damage.

iPad Air Touch Screen Partially Unresponsive Repair

Take down the shield plate with Hot Air Gun at 340℃. Apply some BGA paste flux around U6650 and take down U6650 with Hot Air Gun at 340℃.

iPad Air Touch Screen Partially Unresponsive Repair

Clean tins on the bonding pad with Soldering Iron and then clean the bonding pad with PCB Cleaner.

iPad Air Touch Screen Partially Unresponsive Repair

Apply some BGA paste flux to the bonding pad. Align the new U6650 to the right place and solder with Hot Air Gun at 340℃.

iPad Air Touch Screen Partially Unresponsive Repair

Wait for the logic board to cool for 5 minutes. Then clean with PCB Cleaner. Measure the resistance between 33# and grounding, 35# and grounding. Normal resistance value this time.

iPad Air Touch Screen Partially Unresponsive Repair

Assemble the iPad and test. Touch function back to normal. Fault cleared.

For more details on iPad Air Touch Screen Partially Unresponsive Repair, please go to REWA YouTube channel.

Tools & Parts

Sculpture Knife

Anti-static Glass Wiper

Integrated Mobile Phone Repair Platform

Digital Soldering Iron Rework Station

Straight Tweezer – type 3

Solder Wire

Digital Multimeter

Pry Bar

BGA Strip Flux Soldering Paste

Soft Brush

Apple iPad Touch Screen Digitizer

Apple IC and Components

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