HTC Desire tear-down and re-assembly

This is a step-by-step record of my tear-down and repair of an HTC Desire A8181 Android smart-phone that had a broken AMOLED and touch-screen.

I hope you find it helpful if you need to dis-assemble and re-assemble this device.

The Damage

Dropped onto concrete from a height:
Broken Desire Front

The back is undamaged:
Broken Desire Rear

Tear-down

Removing back cover:
Removing rear cover


Back being removed:
Back being removed

Back removed:
Back removed

Micro-SD card removal:
Micro-SD card removal

Right-side-center cross-head screw removal:
right-side-center cross-head screw removal

Left-side-center cross-head screw removal:
left-side-center cross-head screw removal

Left-side-top Void sticker removal:
left-side-top Void sticker removal

Left-side-bottom Void sticker removal:
left-side-bottom Void sticker removal

Left-side-top Torx M5 screw removal:
left-side-top Torx M5 screw removal

Back-bottom cover removal:
back-bottom cover removal

Back chassis removal:
back chassis removal

Camera PCB cross-head screw removal:
camera PCB cross-head screw removal

USB port cross-head screw removal:
USB port cross-head screw removal

Antenna plug disconnection:
antenna plug disconnection

Lifting camera PCB:
lifting camera PCB

Power button removal:
power button removal

AMOLED plug disconnection:
AMOLED plug disconnection

Keyboard plug disconnection:
keyboard plug disconnection

Touch-screen plug disconnection:
touch-screen plug disconnection

All plugs disconnected from primary PCB:
all plugs disconnected from primary PCB

Lifting primary PCB and camera PCB assembly away:
lifting primary PCB and camera PCB assembly away

Volume rocker button removal:
volume rocker button removal

Lifting AMOLED slighty out of chassis:
lifting AMOLED slighty out of chassis

Lifting keyboard assembly:
lifting keyboard assembly

AMOLED and keyboard button assembly removal:
AMOLED and keyboard button assembly removal

AMOLED and keyboard button assembly removed:
AMOLED and keyboard button assembly removed

Peel away keyboard button sticky shield:
peel away keyboard button sticky shield

Keyboard key-caps removal:
keyboard key-caps removal

Peel away touch-screen PCB assembly from AMOLED:
peel away touch-screen PCB assembly from AMOLED

AMOLED removed:
AMOLED removed

Peel back sticky tape connecting touch-screen to chassis:
peel back sticky tape connecting touch-screen to chassis

Touch-screen in chassis:
touch-screen in chassis

Insert thin blade or wedge between chassis and digitiser:
Insert thin blade or wedge between chassis and digitiser

Force glue bond apart to separate digitiser from chassis :
Force glue bond apart to separate digitiser from chassis

Work counter-clockwise around the digitiser:
Work counter-clockwise around the digitiser

Digitiser separated with flex still inserted :
Digitiser separated with flex still inserted

Remove insulator from flex:
Remove insulator from flex

Insulator removed:
Insulator removed

Rotate digitiser to allow flex to pass through aperture:
Rotate digitiser to allow flex to pass through aperture

Digitiser removed :
Digitiser removed

Carefully remove remaining glass shards:
Carefully remove remaining glass shards

Use a small stiff brush to remove glass particles:
Use a small stiff brush to remove glass particles

Identify any chassis distortion :
Identify any chassis distortion

Apply firm steady pressure to correct distortions:
Apply firm steady pressure to correct distortions

Use isopropyl alcohol to remove remains of adhesive strip:
Use isopropyl alcohol to remove remains of adhesive strip

Rub on with cotton-bud then scrape off with flat-bladed tools:
Rub on with cotton-bud then scrape off with flat-bladed tools

Two sides completed:
Two sides completed

Don't lose the indicator LED lense:
Don't lose the indicator LED lense

Clean the inside surfaces with alcohol too:
Clean the inside surfaces with alcohol too

Re-assembly

I bought replacement digitiser (touch-screen):
Replacement digitiser
and AMOLED (display):
Replacement AMOLED
directly from China. Air shipment to the UK took 3 days. Customs held onto it for 4 days over a weekend. It was delivered 8 days after it was dispatched. Total cost £78.23 (US$114.50). Money transfer cost £10.07 (Western Union).

Peel off the protective cover from the inside of the digitiser:
Peel off the protective cover from the inside of the digitiser

Insert flex through slot in chassis:
Insert flex through slot in chassis

Lay digitiser in place - don't use adhesive yet:
Lay digitiser in place - don't use adhesive yet
Whilst the digitiser is loose take great care to keep it firmly in place when manipulating the device as it is re-assembled. Small bits of sticky tape on each edge will help.

Attach the insulator to the flex circuit:
Attach the insulator to the flex circuit

Fix the sticky tape :
Fix the sticky tape

Peel off the circuit protector :
Peel off the circuit protector

Peel off the adhesive protector :
Peel off the adhesive protector

Insert the AMOLED :
Insert the AMOLED

Fix the digitiser PCB assembly to the AMOLED :
Fix the digitiser PCB assembly to the AMOLED

Install the key-caps:
Install the key-caps

Install the keyboard button assembly:
Install the keyboard button assembly

Fix the keyboard button sticky shield :
Fix the keyboard button sticky shield

Clip the AMOLED into place :
Clip the AMOLED into place

Insert the volume rocker button:
Insert the volume rocker button

Ready for the primary PCB:
Ready for the primary PCB

Lay the primary PCB in place:
Lay the primary PCB in place

Lift the camera PCB and then insert the volume button switches:
Lift the camera PCB and then insert the volume button switches

Volume button switches in place:
Volume button switches in place

Put the camera PCB into place:
Put the camera PCB into place

Connect the digitiser plug :
Connect the digitiser plug

Connect the keyboard plug:
Connect the keyboard

Connect the AMOLED:
Connect the AMOLED

Insert the power button:
Insert the power button

Connect the antenna plug:
Connect the antenna plug

Fit the USB port cross-head screw:
Fit the USB port cross-head screw

Fit the camera PCB cross-head screw:
Fit the camera PCB cross-head screw

Fit the back chassis:
Fit the back chassis

Fit the back-bottom cover:
Fit the back-bottom cover

Fit the left-side-bottom Torq M5 screw:
Fit the left-side-bottom Torq M5 screw

Fit the right-side-bottom Torq M5 screw :
Fit the right-side-bottom Torq M5 screw

Fit the right-side-top Torq M5 screw:
Fit the right-side-top Torq M5 screw

Fit the left-side-top Torq M5 screw:
Fit the left-side-top Torq M5 screw

Fit the right-side-center cross-head screw:
Fit the right-side-center cross-head screw

Fit the left-side-center cross-head screw:
Fit the left-side-center cross-head screw

Insert the micro-SD card:
Insert the micro-SD card

Insert the SIM:
Insert the SIM

Insert the battery:
Insert the battery

Fit the back cover:
Fit the back cover

Test

Switch the power on and test the AMOLED and digitiser to ensure there are no problems. Make sure the 'phone works and can make and receive calls. Check that the microphone and speaker both work.

Finishing

Prepare a dust-free environment. Use a vacuum and lint-free cloth:
Use vacuum devices to prevent static attracting dust particles

Using some suitable double-sided adhesive tape (e.g. 3M 9088 Double-Sided):
3M 9088 double-sided transparent adhesive tape

cut into strips of the correct width and length for the digitiser.

Stretch tape out securely:
Stretch tape out securely

Ruler is taped to work surface:
Ruler is taped to work surface

Score tape into three 2mm wide strips:
Score tape into three 2mm wide strips

Cut from roll:
Cut from roll

Separate each strip:
Separate each strip

Pull apart firmly:
Pull apart firmly

Carefully lift the digitiser out of the chassis and stick the tape into place on the digitiser. Make sure to leave cut-outs where the notification LED and other sensor apertures are on the top edge if not using transparent tape.

Fix strip to rebated frame:
Fix strip to rebated frame

Fix strip to top of digitiser screen:
Fix strip to top of digitiser screen

Fix strip to right edge:
Fix strip to right edge

Fix strip to left edge:
Fix strip to left edge

Fix strip to bottom edge:
Fix strip to bottom edge

Ensure the AMOLED and digitiser are clean and unmarked.

Gently remove any dust particles or grease marks from AMOLED and digitiser:
Gently remove any dust particles or grease marks from AMOLED and digitiser

Once the adhesive is in place peel back the protective paper and lay the digitiser into the frame. Apply firm even pressure around the screen to create a strong bond.

Peel away the adhesive protector:
Peel away the adhesive protector

Ready to fix digitiser into place:
Ready to fix digitiser into place

Digitser fixed in place:
Digitser fixed in place

  • Posted: 2010-06-20 20:56 (Updated: 2010-11-06 06:48)
  • Author: tj
  • Categories: (none)

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