iPhone 4S Speaker Enclosure Replacement

To start, ensure the iPhone's battery has been depleted to a level below 25% capacity; a fully charged lithium-ion battery presents a fire and/or explosion hazard if damaged.
To prevent electrical shock or damage to components, ensure the iPhone is completely de-energized prior to starting the repair process.
Using a Pentalobe P2 screwdriver, detach the two screws measuring 3.6 mm located adjacent to the dock connector.
To prevent damage, ensure the driver is firmly engaged before unscrewing the Pentalobe fasteners, as they are prone to stripping.

Apply pressure to the back cover, directing it upwards against the device's upper rim.
Expect a displacement of approximately 2 millimeters.

Carefully separate the iPhone’s rear panel from its body, taking precautions to avoid breaking the plastic clips affixed to the panel itself.
Carefully detach the iPhone's back cover.

Using the appropriate screwdriver, detach the battery connector from the logic board by unscrewing the screws listed below.
Use a PH00 Phillips screwdriver to remove a 1.7-millimeter screw.
Utilize a PH00 Phillips screwdriver to loosen and remove a 1.5 mm screw.

Gently disengage the pressure contact from the battery connector by sliding it clear of its retaining location.
Carefully detach the pressure contact.

Using a 5/32-inch hex key, carefully tighten the four mounting screws securing the fan assembly to the motor housing, ensuring each is snug but not over-tightened to prevent damage; observe a torque of 6 in-lbs per screw.Carefully disconnect the battery connector from its socket on the logic board by leveraging it upwards with a plastic opening tool.
Using the tool, gently separate the connector's metal cover from the loudspeaker enclosure by inserting the tip between them and raising the connector's lower edge.
To detach the battery connector, move it straight up away from the logic board; avoid any lateral pressure.
Avoid applying force directly to the battery connector's housing, as the four tiny solder joints securing it to the logic board are susceptible to separation.

Using a 5/32-inch hex key, carefully tighten the three retaining screws on the motor assembly to a torque of 3.5 inch-pounds, ensuring not to overtighten and potentially strip the threads; observe the warning label regarding eye protection during this process.Ensure the pressure contact is correctly aligned during reassembly, placing it so it sits atop the Philips screw post and the gold contact faces the battery connector.
To prevent wireless interference caused by oils from handling, thoroughly clean the pressure contact using a degreaser like Windex or isopropyl alcohol.

Using a 5/32-inch hex key, carefully tighten the four mounting screws securing the fan assembly to the motor housing, ensuring each is snug but not over-tightened to avoid damaging the plastic; a torque of 6 in-lbs is recommended.Using a plastic opening tool, gently wedge the tip into the gap separating the battery from the iPhone's exterior casing, positioning the tool close to the device's lower edge.
Using the plastic opening tool, carefully work your way along the right side of the battery, lifting it slightly at multiple spots to release the adhesive holding it in place within the outer case, ensuring complete separation.
To loosen a stubborn battery bond, carefully introduce a small quantity of isopropyl alcohol—ensure its concentration exceeds 90%—directly beneath the battery's edge.
Allow approximately 60 seconds for the alcohol to reduce the adhesive's bonding strength.
Carefully raise the battery using the flat, plastic tip of a specialized opening tool.
To prevent damage, avoid using excessive force when removing the battery; if the adhesive resists, add additional alcohol droplets to loosen it. Ensure the battery remains intact and undamaged during removal; do not bend, puncture, or otherwise compromise its structure with the pry tool.
To prevent damage, ensure all traces of the alcohol solution are removed by wiping with a clean cloth or by permitting complete evaporation before proceeding with the new battery installation.

Using a 5/32-inch hex key, carefully tighten the four mounting screws securing the fan assembly to the motor housing, ensuring each is snug but not over-tightened to prevent damage; observe a torque of 3.5 inch-pounds per screw.Gently lift the battery away from its adhesive backing by grasping the visible, transparent plastic tab.
Exercise caution when drawing back the plastic tab, as excessive force may cause it to tear.
Disconnect the power source by detaching the battery.
Carefully discard the protective plastic packaging that accompanied the new battery, ensuring you avoid contact with the ribbon cable during removal.
Before installing the new battery, ensure the included cable is formed into the correct configuration, paying close attention to its shape.
To guarantee correct positioning during battery replacement, briefly attach the battery connector to the device; after securing the battery with adhesive, detach the connector.
Following reassembly, execute a complete system reset to mitigate potential problems and streamline any subsequent diagnostic procedures.

Using a 5/32-inch hex key, carefully tighten the four mounting screws securing the fan assembly to the motor housing, ensuring each is snug but not overtightened to avoid damaging the plastic.Using a Phillips #00 screwdriver, detach the cover protecting the dock connector cable by unscrewing all screws holding it in place.
Use a Phillips screwdriver to remove a single screw with a 1.5 mm head.
Use a Phillips screwdriver to remove a single screw with a 1.2 mm head.
Carefully detach the metal cover protecting the dock connector cable.

Carefully lift the dock cable connector from its corresponding socket on the logic board using the flat edge of a plastic opening tool.

Carefully detach the dock connector cable from both the logic board and the speaker enclosure's side wall, as it is held in place by adhesive.

Carefully lift the cellular antenna cable connector from its corresponding socket on the logic board using the tip of a plastic opening tool.
Carefully maneuver the cellular antenna cable, freeing it from the metal finger retainers secured to the logic board.

Using a Phillips screwdriver, detach the speaker enclosure assembly from the outer case by unscrewing the two fasteners, each measuring 2.4 mm.

Carefully extract the tiny, black-colored spacer located beneath the Phillips screw positioned close to the vibrator.

1. Carefully detach the speaker enclosure assembly from the device housing using a plastic pry tool, exercising caution to avoid bending or breaking the EMI antenna’s delicate fingers.
   Carefully detach the speaker enclosure, ensuring all fasteners are released.
2. Ensure the Wi-Fi grounding fingers are positioned beneath the lip of the iPhone’s metal case, referencing the third image for correct placement, prior to tightening the speaker enclosure assembly's screws.
   To prevent wireless interference, thoroughly remove any oils from the iPhone case and the grounding fingers of the Wi-Fi antenna where they meet, using a de-greaser like Windex or isopropyl alcohol before reassembling.

• Using a Phillips screwdriver, detach the cellular antenna from the speaker enclosure by unscrewing the two fasteners held in place with 1.6 mm screws.

1. Carefully begin separating the antenna from the speaker housing by gently working a plastic opening tool between them, starting close to where the cellular antenna cable is connected.
   Carefully detach the cellular antenna from the speaker enclosure, avoiding damage to the gold bracket affixed to its side.
   Disconnect and detach the cellular antenna.

Prior to adhering the cellular antenna, position the gold bracket around the speaker enclosure's molded projection.

The speaker housing is still present.