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iPhone 6 Logic Board Replacement

This document details the procedure for swapping out a defective iPhone 6 logic board.

  • Due to a factory pairing process, the iPhone's logic board and Touch ID sensor function as a matched set; substituting the logic board necessitates a compatible home button, also correctly paired to the new logic board, to maintain Touch ID functionality.

This document provides instructions for substituting a new Upper Cable Bracket as needed.

Step 1 | Pentalobe Screws

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To prevent a fire hazard or explosion due to accidental puncture, ensure the lithium-ion battery's charge level is below 25% prior to beginning any disassembly procedures on your iPhone.
To prevent electrical shock or damage, ensure the iPhone is completely de-energized prior to commencing the repair process.
Using a Pentalobe screwdriver, detach the two screws measuring 3.6 millimeters in length, which are situated adjacent to the Lightning connector.

Step 2 | Anti-Clamp instructions

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To simplify the subsequent opening process, the following two steps utilize the Anti-Clamp tool, a custom-designed aid; if you choose not to employ this tool, proceed directly to the instructions three steps further down.
Refer to the included guide for detailed procedures regarding Anti-Clamp operation.
To release the Anti-Clamp's arms, move the blue handle in a rearward direction.
Position the arms so they clear the left or right side of the iPhone, then move them into place.
Affix two suction cups to the iPhone's front and rear surfaces, placing them close to the lower edge, directly above the home button.
Apply vacuum by pressing the cups firmly against the surface needing treatment.
To enhance the Anti-Clamp's grip if the iPhone's exterior feels excessively smooth, apply adhesive tape to the device's surface.

Step 3

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To secure the arms, advance the blue handle in the direction indicated.
Rotate the handle fully, completing a full 360-degree turn, observing for the initial signs of cup expansion.
Maintain parallel positioning of the suction cups; should misalignment occur, gently release the suction cups’ hold and reposition the arms.
Once sufficient space is created by the Anti-Clamp, slide a prying tool beneath the display.
Adjust the handle by 90 degrees to increase the separation if the Anti-Clamp's opening is inadequate.
Allow several seconds of inactivity between each incremental tightening, limiting each rotation to a maximum of 90 degrees. Permit the Anti-Clamp feature and dwell time to facilitate proper seating.

Step 4 | Manual Opening Procedure

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Lacking an Anti-Clamp tool, secure the front panel with a single suction cup for lifting.
Using a suction cup, apply it to the display surface, positioning it directly over the home button area.
Ensure a firm contact between the cup and the screen to create a leakproof connection.
To facilitate suction cup attachment when the display has severe cracking, apply a sheet of clear packing tape across the damaged area; as an alternative, a robust adhesive tape can be used in place of the suction cup. Should neither of these methods work, secure the suction cup directly to the fractured screen using superglue.

Step 5

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Using one hand to secure the iPhone, lift the suction cup vertically to gently create a small gap between the front panel and the rear enclosure.
Exercise caution and use steady, even pressure when installing the display assembly, as it requires a significantly snugger fit than typical device components.
Carefully separate the rear case from the display assembly by gently levering it downwards with a plastic opening tool, maintaining upward traction on the display with the suction cup.
To release the front panel assembly from the rear case, carefully disengage the multiple retaining clips, which may require utilizing both the suction cup and plastic opening tool.

Step 6

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To detach the suction cup, depress the small plastic projection that maintains the airtight seal.
Detach the display assembly's suction cup.

Step 7 | Opening up the phone

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Employing the phone's upper edge as a pivot point, carefully separate the front panel assembly from the rear case by initiating a sweeping motion originating from the home button end.
The front panel's upper edge incorporates multiple clips that function as a partial hinge.
Position the clips beneath the rear case's upper border, ensuring proper alignment. Subsequently, move the front panel vertically, advancing it until its superior edge is level with the rear case's top edge.

Step 8

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Carefully position the display at a roughly 90-degree angle, then secure it in a supported position to prevent movement during the repair process.
If a suitable replacement is unavailable, a factory-sealed, unopened can of soda can be temporarily used.
To avoid stressing the display's wiring during the repair process, secure it with a rubber band.

Step 9 | Removing the battery connector bracket screws

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Using a Phillips screwdriver, detach the battery connector bracket by unscrewing the included screws.
A screw with a 2.2 mm head diameter is required.
A single screw, measuring 3.2 millimeters, is required.
Carefully note the location of every screw during disassembly, as reassembly requires placing each one in its original position to prevent potential damage to the device.

Step 10

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Detach the bracket securing the battery connector using a tri-point screwdriver, ensuring no damage occurs to surrounding components.

Step 11 | Disconnecting the battery connector

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Carefully lift the battery connector away from its corresponding socket on the logic board, utilizing a plastic opening tool to avoid damage.
To avoid damaging the logic board socket, focus your prying action solely on the battery connector; applying force to the socket itself risks complete connector failure.

Step 12 | Removing the front panel assembly cable bracket screws

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Using a Phillips screwdriver, detach the cable bracket from the front panel assembly by unscrewing the five screws that hold it in place.
Use three screws, each measuring 1.2 millimeters.
A screw with a 1.7 mm diameter is required.
A single screw with a 3.1 mm diameter is required.
Improper screw installation during reassembly can result in irreversible harm to the iPhone's logic board.

Step 13

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Detach the bracket securing the front panel assembly cable to the logic board.

Step 14

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When proceeding with the following four actions, ensure you apply lifting force solely to the cable connectors themselves, avoiding any pressure on the corresponding sockets located on the logic board.
Carefully detach the front camera and sensor cable connector from its socket using a spudger or similar tool.

Step 15

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Carefully detach the home button cable connector using a spudger or fingernail.

Step 16

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Using the 5mm hex key, carefully tighten the four M4x8 screws securing the fan assembly to the heatsink, ensuring a torque of 0.8 Nm is applied to each screw to prevent damage.
Prior to either detaching or reattaching the cable in this procedure, ensure the battery is disconnected.
  • Carefully separate the display data cable connector from its socket using a spudger or similar tool.

  • To avoid a blank screen or white lines after reassembly, ensure the display data cable remains securely attached to its connector; if these issues appear upon powering on, the cable likely became disconnected and should be reconnected, with a complete power cycle achieved by briefly disconnecting and reconnecting the battery connector.

Step 17

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Carefully secure the 1/4-inch hex key into the driver, then tighten the four M4 x 8mm screws on the fan shroud to a torque of 5 in-lbs, ensuring the shroud remains properly aligned with the heat sink to prevent damage.
Carefully separate the digitizer cable connector from its socket using the flat spudger.

  • To avoid potential digitizer damage or component bending, apply pressure to one end of the digitizer cable connector, then to the opposite end when reattaching it, rather than pressing on the connector's central area.

Step 18 | Separating front panel assembly and rear case

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Using the 5mm hex key, carefully tighten the four M4x8 screws securing the fan assembly to the heatsink, ensuring a torque of 4.0 in-lbs is achieved to maintain proper contact and prevent damage.
Detach the front panel assembly by disengaging it from the rear case.

Step 19 | SIM Card

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Using a 5/32-inch hex key, carefully tighten the four M4x8 screws securing the fan assembly to the heatsink, ensuring a torque of 4.5 in-lbs to prevent damage.
Using a SIM card eject tool or a straightened paperclip, gently push into the tiny aperture located on the SIM card tray to release it.

Apply pressure until the tray releases and extends.
Applying considerable pressure might be necessary.

Step 20

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Carefully align the 4mm hex key to the setscrew, ensuring it engages fully, then apply a torque of 1.5 Nm using the torque wrench to secure the spindle.
Using the SIM eject tool or a similar small, pointed object, carefully depress the SIM tray release button located on the side of the iPhone to release and extract the SIM card tray assembly.

Confirm the SIM card's alignment within the tray before sliding it back in, matching its position to the tray's design.

Step 21 | Logic Board

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Carefully detach the Lightning connector assembly cable from its socket using the flat spudger, then maneuver it aside to avoid interference with the speaker.

Step 22

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Carefully leverage the antenna cable connector away from its socket on the logic board using a spudger's tip.

Step 23

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Using a Phillips screwdriver, detach the upper cable bracket by unscrewing the included fasteners.
A screw with a 2.9 mm diameter is required.
A screw with a 2.2-millimeter head diameter is required.

Step 24

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Detach the iPhone's upper cable securing bracket.

Step 25

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To avoid irreversible harm to the logic board, carefully separate connectors by applying upward pressure solely to the connector body itself, never the socket it connects to.
Employing the flat spudger tip, carefully disengage the power button and flash assembly cable connector from its socket.
Carefully detach the volume control cable connector from its corresponding socket on the logic board.

Step 26

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Using a Phillips screwdriver, detach the four screws securing the Wi-Fi antenna.
A screw with a 1.5 mm head diameter is required.
A screw with a 1.4 mm diameter is required.
Use two screws, each measuring 2.1 millimeters.

Step 27

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Detach the iPhone's Wi-Fi antenna.
To prevent conductivity issues caused by oils from your skin, avoid direct contact with metal-to-metal interfaces; instead, utilize tweezers or gloves. Should contact occur, thoroughly clean these areas with a degreaser, such as Windex or isopropyl alcohol, prior to reassembling the device.

Step 28

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Using a Phillips screwdriver, detach the grounding bracket by unscrewing the pair of 1.6 mm screws securing it.

Step 29

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Detach the iPhone's grounding bracket.

Step 30

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Using a Phillips screwdriver, detach the angled logic board bracket by unscrewing the screws that hold it in place.
A screw with a 2.6-millimeter head diameter is required.
A single 1.3 mm screw is situated within the iPhone's upper sidewall, oriented horizontally.

Step 31

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Using a Phillips head screwdriver, detach the angled bracket securing the logic board.

Step 32

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Using a Phillips screwdriver, detach the antenna interconnect cable from the logic board by unscrewing the 1.2 mm screw that holds it in place.

Step 33

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Carefully maneuver the antenna interconnect cable, using a spudger tip to gently lift and position it clear of the logic board.

Step 34

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Employing the flat spudger tip, carefully disengage the camera cable connector by applying upward pressure to remove it from its corresponding socket on the logic board.
To prevent irreversible logic board damage, apply prying force exclusively to the connector, avoiding contact with the socket.
To allow access to the logic board, carefully maneuver the camera cable so it is positioned away from the work area.

Step 35

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Using the appropriate screwdriver, detach the logic board from the rear case by unscrewing all listed fasteners.
Use two Phillips head screws, each measuring 1.9 millimeters.
A screw with a 2.3 mm diameter is required.
Employ a standoff screwdriver or bit to extract standoff screws.
If a dedicated tool isn't available, a small flathead screwdriver can be carefully employed; however, exercise heightened awareness to prevent slippage and potential harm to nearby parts.

Step 36

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Using a 5/32-inch hex key, carefully tighten the four M4x8 screws securing the fan assembly to the heatsink, ensuring a torque of 4.5 in-lbs to prevent damage.
Carefully raise the logic board's battery connector end a small amount—sufficient for fingertip grip—by gently prying with the spudger's flat edge.
To prevent chip or socket damage, use the spudger to carefully access the metal shields located beneath the SIM card tray.

Step 37

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Using a 5/32-inch hex key, carefully tighten the four M4x8 screws securing the fan assembly to the heatsink, ensuring a torque of 4.5 in-lbs to prevent damage.
Carefully raise the logic board's battery connector end, then disengage it from the rear case by pulling upwards.
Exercise caution to prevent the logic board from being caught by any wires.
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