Some components are expected to wear out over UNIT-4’s lifetime - main examples being batteries and speaker drivers. UNIT-4 has been designed to be disassembled with glue-free design by anyone with 2 screwdrivers and AIAIAI’s step by step repair guides. This will make sure your UNIT-4's will stay with you for as long as possible.

TOOLS

All you need is a thin, hard plastic tool or an old credit card and 2 cross head screwdrivers. We use a Phillips 0 and a Phillips 2.

REPLACING THE BATTERY

Remove the front panel

• Make sure UNIT-4 is turned off.
• Use a thin, hard plastic tool or an old credit card and pull off the front panel.

Remove the LED ring

• Take a screwdriver and remove all 6 screws from the LED ring.
• Gently pull the LED ring out.

Remove woofer from housing

• Take a screwdriver and remove all 6 screws from the woofer.
• Gently pull out the woofer from the housing.

Disconnect the woofer

• Use a tool that is slim enough to press in the lock mechanism of the woofer connector. We use a Phillips 0 screwdriver.
• Remove the woofer.

Install new woofer

• Connect the new woofer to the PCBA and fix into it into the front housing.
• Add the 6 screws and hand tighten.

Fix in the LED ring

• Carefully tilt the LED ring into the housing.
• Add the 6 screws and hand tighten.

Mount front panel

• Take the front panel and place on top of the front housing.
• Push with 2 thumbs on the 8 points shown below.