The wide usage of flex cables and flex circuits in components utilizing LCD displays has led to service stations pilling up with LCD modules with broken flex but working LCD display panels. The ability of these service stations to repair these LCD modules can mean additional income to its business and provide savings for its customers.

Here we will detail the procedures and equipments needed to rework the flex in an LCD module.

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LCD panel and its Flex

Obtain an LCD module with a defective flex. Most LCD modules have a simple plastic casing that can easily be detached. After detaching the case a few thin films of plastics and metallic sheets can be found in-between the case and LCD panel. These are backlight diffusers and reflectors, set them aside as we will only need the LCD panel with the flex attached.

Next we would need to detach the damaged flex, A Hot Bar soldering system set at around 230 to 260°C would be enough to break down the adhesive bonding of the flex and LCD panel. Lightly heat the contact area between the Flex and LCD panel using the hot bar tool. The flex can then be easily peeled off.
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