Tomtom Via 135 Touchscreen Replacement Repair Guide

Difficulty

Moderate

Steps

Time Required

                          1 hour

Sections

Touchscreen
4 steps

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Introduction

What you need

Step 1

              Open device

Remove Torx screw inside opening for suction cup
Work around edges with opening tool to release clips
Carefully separate sides and remove microphone connector
Open 90 degrees and release flat ribbon connector

Remove Torx screw inside opening for suction cup

Work around edges with opening tool to release clips

Carefully separate sides and remove microphone connector

Open 90 degrees and release flat ribbon connector

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Step 2

              Remove broken touchscreen

Remove display side from backside
Carefully release clips round LCD-Display (4)
Be sure to wear some eye-protection and gloves next as glass fragments may be set free from broken panel.
With cutter knife carefully work between touch panel glass and LCD frame (metal).
Remove all glass and parts of damaged touch schreen
Do NOT rip off the flexible PCB. This must be desoldered very carefully

Remove display side from backside

Carefully release clips round LCD-Display (4)

Be sure to wear some eye-protection and gloves next as glass fragments may be set free from broken panel.

With cutter knife carefully work between touch panel glass and LCD frame (metal).

Remove all glass and parts of damaged touch schreen

Do NOT rip off the flexible PCB. This must be desoldered very carefully

Step 3

              Desolder connector

Carefully remove the green sticker over the four soldering pads
There is some double sided tape behind the marked part. Do not rip the flexible PCB or you will easily damage the soldering pads as I did.
Heat up the pads either all at once and lift them up from the end of the PCB first or try to start from one side and ‘roll’ up the PCB from one side to the other.
If you rip a soldering pad like I did, you still can repair it provided some good eyesight…

Carefully remove the green sticker over the four soldering pads

There is some double sided tape behind the marked part. Do not rip the flexible PCB or you will easily damage the soldering pads as I did.

Heat up the pads either all at once and lift them up from the end of the PCB first or try to start from one side and ‘roll’ up the PCB from one side to the other.

If you rip a soldering pad like I did, you still can repair it provided some good eyesight…

Step 4

              Install new screen

Assembly is done in reverse order
Apply new touchscreen with double sided adheisive tape. Be sure to clean LCD surface before and remove any protective cover of new touchscreen
Some touchscreen are not exactly same as original, the flexible PCB has to be bent very gently to align with pads.
Make sure the LCD´s flexible PCB is bent back fully, as this will be the position in closed device.
Carefully solder all four pads.
Connect LCD and try the touchscreen operation before closing the device.

Assembly is done in reverse order

Apply new touchscreen with double sided adheisive tape. Be sure to clean LCD surface before and remove any protective cover of new touchscreen

Some touchscreen are not exactly same as original, the flexible PCB has to be bent very gently to align with pads.

Make sure the LCD´s flexible PCB is bent back fully, as this will be the position in closed device.

Carefully solder all four pads.

Connect LCD and try the touchscreen operation before closing the device.

To reassemble your device, follow these instructions in reverse order.

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                    Thomas Widmaier

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Member-Contributed Guide

Introduction

What you need

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