Sony M-430 Microcassette-Corder Motherboard Replacement

Find the arrow on the battery cover on the back of the device.

While pressing down on the arrow, slide the cover towards the bottom of the recorder until it clicks.

Lift the cover and remove the batteries.

Remove the battery cover by first tilting it so it is at a right angle with the rest of the device.

Next, twist it to the side as shown in the second picture. The lid should simply snap off.

Use a #00 Phillips head screwdriver to remove the four (1.7x16 mm) screws from the back case.

Next, use the same screwdriver to unscrew the (1.7X5 mm) screw, which is located inside the battery compartment.

Use a spudger to push in the two tabs located on the bottom of the device.

With a firm grip on the larger half, remove the back cover by lifting first on the battery area.

Using tweezers, pull upward on the black tape which secures the wires.

Removing this tape allows you to move the wires out of the way for the next step.

Desolder all wires connecting components to the motherboard.

A red wire and a blue wire connect the motor to the motherboard.

Two black wires connect the speaker to the motherboard.

A red wire and a black wire connect the microphone to the motherboard.

After desoldering the microphone connections, pull the microphone straight out from the device and set aside.

Removing the microphone gives you access to the green ribbon cable that connects to the mechanism deck.

Desolder the 4 connections of the green ribbon cable.

Pull upward on the green ribbon cable to separate it from the motherboard.

Using a #00 Phillips screwdriver, remove the two 1.4x3 mm screws securing the motherboard.

If the replacement motherboard does not have the wire battery terminals attached, desolder the two battery connections on the motherboard.

Leave the wire battery terminals in place.

If the replacement motherboard has battery terminals attached, the connections do not need to be desoldered.

To remove the battery terminals, use a prying tool to push the lip of the metal wire towards the motherboard.

Lift up on the wire while the small lip is depressed and slide the wire terminals out of the plastic guides.

Verify all of the connections have been desoldered and the screws removed.

Lift the motherboard upward to remove it from the microcassette-corder.