Sony ST26i User manual

1268-3894 Rev 2
 Sony Mobile Communications AB – Company Internal
Working Instructions
- mechanical -
ST26i, ST26a

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
2(57)
CONTENTS
1 Exterior Views.................................................................................4
1.1 ST26i, ST26a.........................................................................................4
2 Tools................................................................................................5
3 Disassembly....................................................................................6
3.1 Battery Cover........................................................................................6
3.2 Battery...................................................................................................6
3.3 Antenna BT WIFI & Antenna GPS & Antenna Main............................7
3.4 Rear Cover............................................................................................8
3.5 Core Unit Label...................................................................................10
3.6 Sub Board Assembly.........................................................................10
3.7 Front Cover Display Assembly .........................................................12
3.8 Main PBA & Link FPC ........................................................................14
4 Replacement.................................................................................16
4.1 Battery Cover......................................................................................16
4.2 Antenna BT WIFI ................................................................................16
4.3 Antenna GPS......................................................................................16
4.4 Antenna Main......................................................................................16
4.5 Rear Cover..........................................................................................17
4.6 Core Unit Label...................................................................................17
4.7 Sub Board Assembly.........................................................................17
4.8 Front Cover Display Assembly .........................................................17
4.9 Link FPC .............................................................................................18
4.10 Coaxial Cable......................................................................................19
4.11 Connector Film (Front side of Main PBA).........................................21
4.12 Connector Film (Back side of Main PBA).........................................23
4.13 LCM connector sponge .....................................................................24
4.14 Link FPC kapton.................................................................................25
4.15 Loudspeaker & Speaker Adhesive....................................................27
4.16 Main Camera.......................................................................................29
4.17 Proximity rubber ................................................................................31
4.18 Receiver & Receiver Adhesive..........................................................32
4.19 RF Rubber...........................................................................................34
4.20 Rubber Flash Led White ....................................................................35
4.21 Side Key..............................................................................................36
4.22 SIM SD Side Key FPC.........................................................................38
4.23 Water Indicator...................................................................................40
4.24 Board Swap - Replacement...............................................................42
4.25 Board Swap – Change Label.............................................................42
4.26 Board Swap – Customize of Software..............................................42

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
3(57)
5 Reassembly...................................................................................43
5.1 Main PBA & Link FPC ........................................................................43
5.2 Front Cover Display Assembly .........................................................44
5.3 Sub Board Assembly.........................................................................48
5.4 Rear Cover..........................................................................................51
5.5 Antenna BT WIFI & Antenna GPS & Antenna Main..........................53
5.6 Core Unit Label...................................................................................55
5.7 Battery.................................................................................................56
5.8 Battery Cover......................................................................................56
6 Revision History...........................................................................57
For general information about mechanical repair related issues, refer to
1220-1333: Generic Repair Manual - mechanical

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
4(57)
1 Exterior Views
1.1 ST26i, ST26a

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
5(57)
2 Tools
SPECIAL TOOLS
1. Torque Screwdriver
2. Flex Film Assembly Tool
3. Bits (T5)
4. Front Opening Tool
5. Guitar Pick
For part no’s on the tools above, refer to the ‘Tools Catalogue/Matrix’!
STANDARD TOOLS
1. Tweezers

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
6(57)
3 Disassembly
The disassembly is done in the following order:
1. Battery Cover
2. Battery
3. Antenna BT WIFI (a) & Antenna GPS (b) & Antenna
Main (c)
4. Rear Cover
5. Core Unit Label
6. Sub Board Assembly
7. Front Cover Display Assembly
8. Main PBA (a) & Link FPC (b)
3.1 Battery Cover
Insert a finger into the gap as shown in picture and gently
pull upwards to release the hooks of the Battery Cover.
Turn around and remove the Battery Cover.
3.2 Battery
Insert a finger and raise the bottom of the battery to release
it.

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
7(57)
Disassembly
Remove the battery.
3.3 Antenna BT WIFI &
Antenna GPS & Antenna Main
Remove the three Screw M1.6*4.2 by using a screwdriver
with Bits (T5).
Scrap! Not to be reused!
Remove the Screw Lanyard M1.6*3.2 by using a screwdriver
with Bits (T5).
Scrap! Not to be reused!
Remove the Antenna BT WIFI by using a Flex Film
Assembly Tool.

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
8(57)
Disassembly
Remove the Antenna GPS by using a Flex Film Assembly
Tool.
Remove the Antenna Main by using a Flex Film Assembly
Tool.
3.4 Rear Cover
Remove the RF Rubber by using a Flex Film Assembly Tool.
Remove the Screw M1.6*4.2 by using a screwdriver with
Bits (T5).
Scrap! Not to be reused!

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
9(57)
Disassembly
Remove the three Screw M1.6*2.8 by using a screwdriver
with Bits (T5).
Scrap! Not to be reused!
There are ten snap hooks securing the Rear Cover.
Insert a Guitar Pick as shown in picture and gently pull
upwards to release the three hooks of this side.
Do the same to the top side.

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
10(57)
Disassembly
Do the same on the left side.
Remove the Rear Cover.
3.5 Core Unit Label
Carefully remove the Core Unit Label by using a Flex Film
Assembly Tool.
3.6 Sub Board Assembly
Peel off the Link FPC kapton.

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
11(57)
Disassembly
Unlock the ZIF connector by using a Front Opening Tool.
Release the flex part.
Disconnect this end of the Coaxial Cable.
Insert a Front Opening Tool as shown in picture and gently
pull upwards to release the hook.

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
12(57)
Disassembly
Remove the Sub Board Assembly.
3.7 Front Cover Display
Assembly
Gently pull upwards to detach the Link FPC from the Front
Cover Display Assembly.
Clean the surplus adhesive on Front Cover Display
Assembly if have!
Peel off the LCM connector sponge.
Release the foil from down side of the key dome and lift it up
by using a Flex Film Assembly Tool.

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
13(57)
Disassembly
Check the adhesive on the back side of SIM SD Side Key
FPC.
If the side key adhesive is not damaged after
disassembly, the SIM SD Side Key FPC can be reused
one time only! Otherwise always scrap the SIM SD Side
Key FPC after side key disassembly whatever the side
key adhesive is damaged or it's disassembled more
than two times!
Peel off the Connector Film.
Unlock the ZIF connector by using a Front Opening Tool.
Release the flex part.

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
14(57)
Disassembly
Insert a Front Opening Tool as shown in picture and gently
pull upwards to release the hook.
Disconnect the Coaxial Cable from Main PBA as shown in
the picture.
Be careful not to pull/damage the Coaxial Cable during
Disassembly!
Separate the Main PBA with the Link FPC and Front Cover
Display Assembly.
3.8 Main PBA & Link FPC
Turn over the Main PBA and peel off the Connector Film.

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
15(57)
Disassembly
Unlock the ZIF connector by using a Front Opening Tool.
Separate the Main PBA and the Link FPC.
Link FPC can’t be reused after disassembly, scrap!

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
16(57)
4 Replacement
4.1 Battery Cover
Follow the 3.1 Disassembly instructions!
Prepare a new Battery Cover.
Follow the 5.8 Reassembly instructions!
4.2 Antenna BT WIFI
Follow the 3.1 – 3.3 Disassembly instructions!
Prepare a new Antenna BT WIFI.
Follow the 5.5, 5.7 – 5.8 Reassembly instructions!
4.3 Antenna GPS
Follow the 3.1 – 3.3 Disassembly instructions!
Prepare a new Antenna GPS.
Follow the 5.5, 5.7 – 5.8 Reassembly instructions!
4.4 Antenna Main
Follow the 3.1 – 3.3 Disassembly instructions!
Prepare a new Antenna Main.
Follow the 5.5, 5.7 – 5.8 Reassembly instructions!

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
17(57)
Replacement
4.5 Rear Cover
Follow the 3.1 – 3.4 Disassembly instructions!
Prepare a new Rear Cover.
Follow the 5.4 – 5.5, 5.7 – 5.8 Reassembly instructions!
4.6 Core Unit Label
Follow the 3.1 – 3.5 Disassembly instructions!
Prepare a new Core Unit Label.
Follow the 5.4 – 5.8 Reassembly instructions!
4.7 Sub Board Assembly
Follow the 3.1 – 3.6 Disassembly instructions!
Prepare a new Sub Board Assembly.
Follow the 5.3 – 5.8 Reassembly instructions!
4.8 Front Cover Display
Assembly
Follow the 3.1 – 3.7 Disassembly instructions!
Prepare a new Front Cover Display Assembly.
Follow the 5.2 – 5.8 Reassembly instructions!
Note: Calibrate the Touch Panel 1270-6729 Trouble Shooting
Application – mechanical after replacement.

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
18(57)
Replacement
4.9 Link FPC
Follow the 3.1 – 3.8 Disassembly instructions!
Prepare a new Link FPC.
Follow the 5.1 – 5.8 Reassembly instructions!

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
19(57)
Replacement
4.10 Coaxial Cable
Follow the 3.1 – 3.7 Disassembly instructions!
Carry out the Removal as described below.
Prepare a new Coaxial Cable.
Carry out the Installation as described below.
Follow the 5.2 – 5.8 Reassembly instructions!
REMOVAL
Push the two metal hooks a little higher to release Coaxial
Cable by using a Flex Film Assembly Tool.
Only push the hooks a little higher, not to damage these
two metal hooks!
Release the Coaxial Cable from its cavity and remove it.
INSTALLATION
Place a new Coaxial Cable in the correct position as shown
in the picture.

Working Instructions (mech)
1268-3894 Rev 2
 Sony Mobile Communications AB –
Company Internal
20(57)
Replacement: Coaxial Cable
Insert the Coaxial Cable into the two hooks on Front Cover
Display Assembly by using Flex Film Assembly Tool.
Note: Gently secure the cable without causing damage.
Press down the two metal hooks a little lower by using a
Flex Film Assembly Tool to hold the Coaxial Cable.
Be careful about the two connectors' correct direction
of Coaxial Cable!