Sony Ericsson K550 Service Manual

Working Instruction, Mechanical

Applicable for K550i, K550c & K550im

CONTENTS

1 Introduction .............................................................................. 3

1.1 K550 ……………………………………………………………… 3

1.2 K550 ……………………………………………………………….4

1.3 Equipment.................................................................................5

1.4 General cautions ...................................................................... 6

2 Disassembly ............................................................................. 7

2.1 Overview ...................................................................................8

2.1.1 Battery Cover & Battery......................................................... 9

2.1.2 Speaker Cover ....................................................................11

2.1.3 Front Cover ......................................................................... 12

2.1.4 Keypad ................................................................................ 14

2.1.5 PCBA ..................................................................................15

3 Replacements......................................................................... 16

3.1 Battery Cover..........................................................................17

3.2 Speaker Cover ........................................................................ 17

3.3 Front Cover .............................................................................17

3.4 Keypad ....................................................................................17

3.5 PCBA ……………………………………………………………..17

3.6 Back Cover.............................................................................. 17

3.7 Co-brand Label ....................................................................... 18

3.8 RF Cap.....................................................................................20

3.9 Vibrator.................................................................................... 21

3.10 Power Key ...............................................................................22

3.11 Volume Key.............................................................................23

3.12 Music Key................................................................................ 25

3.13 Camera Key............................................................................. 27

3.14 Ear Speaker” Receiver” Tape................................................29

3.15 Ear Speaker “Receiver” ......................................................... 30

3.16 LCD ……………………………………………………………..31

3.17 Frame ……………………………………………………………..35

3.18 Dome Assy..............................................................................37

3.19 Loudspeaker ........................................................................... 38

3.20 Flash LED / BT Antenna Frame.............................................40

3.21 Flash LED................................................................................42

3.22 BT Antenna .............................................................................43

3.23 Shield Lid Main BB.................................................................44

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Working Instruction, Mechanical

3.24 Camera ....................................................................................46

3.25 Antenna ...................................................................................49

3.26 SIM Tape.................................................................................. 51

3.27 Liquid Intrusion Indicator ...................................................... 52

3.28 KRH Label ...............................................................................53

4 Reassembly ............................................................................ 54

4.1 Overview .................................................................................55

4.1.1 PCBA ..................................................................................56

4.1.2 Keypad ................................................................................ 57

4.1.3 Front Cover ......................................................................... 58

4.1.4 Speaker Cover ....................................................................59

4.1.5 Battery & Battery Cover....................................................... 60

5 Revision history ..................................................................... 62

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Working Instruction, Mechanical

1 Introduction

1.1 K550

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Working Instruction, Mechanical

1.2 K550

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Working Instruction, Mechanical

1.3 Equipment

SPECIAL TOOLS

• NTZ 112 459 Torque screwdriver (or equivalent)

• NTZ 112 288 Torx bit no. 6

• NTZ 112 1052 JCIS BIT

• NTZ 111 077 Camera Tool

• NTZ 112 521 Flex film assembly tool

• NTZ 112 302/2 Front opening tool

STANDARD TOOLS

Standard tools have to be locally purchased

• Dentist hook

• ESD tweezers

• Guitar pick

LABEL EQUIPMENT

The following special equipment is required when replacing or installing a new label:

• Hot air flow solder station

• Zebra printer connected to computer

OTHER EQUIPMENT

• ESD-wristband

• ESD-gloves

• Isopropyl alcohol

• Air blower

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Working Instruction, Mechanical

1.4 General cautions

The following cautions are considered to be generic for all phone models and will not be repeated in the Disassembly, Replacements and Reassembly sections:

• T

URN OFF THE PHONE AND REMOVE THE SIM CARD AND THE M2 MEMORY CARD BEFORE STARTING THE

DISASSEMBLY!

KEEP ALL CONTACT SURFACES CLEAN!

•

BE CAREFUL WHEN USING TOOLS LIKE THE DENTIST HOOK, TWEEZERS, OPENING TOOLS, GUITAR PICK ETC. TO AVOID SCRATCHES OR DAMAGES TO THE EXTERIOR AND INTERIOR PARTS OF THE PHONE!

BE CAREFUL NOT TO DAMAGE ANY CONTACT SPRINGS!

•

REMEMBER TO REMOVE THE PROTECTION FOILS ON NEW PARTS SUCH AS THE LCD!

•

NEVER TOUCH THE DISPLAY GLASS!

•

USE AIR BLOW EQUIPMENT TO KEEP THE FRONT WINDOW AND DISPLAY MODULE DUST FREE!

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Working Instruction, Mechanical

2 Disassembly

When you are going to replace a part being listed in Replacements, the instruction of that section usually begins by directing you to this Disassembly section with a specification of the instructions you have to carry out in order to disassemble the phone as far as needed before returning to Replacements for the actual replacement.

REPLACEMENTS

Start

Contents

page

DISASSEMBLY

REASSEMBLY

Done

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Working Instruction, Mechanical

2.1 Overview

The disassembly is done in the following order:

1. Battery Cover (a) & Battery (b)

2. Speaker Cover

3. Front Cover

4. Keypad

5. PCBA

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Working Instruction, Mechanical

2.1.1 Battery Cover & Battery

Unlock the battery cover by opening the side locks in the direction showing in the picture.

Grip the battery cover at the bottom with fingers, and then start lifting upwards from the phone.

Remove battery cover.

Raise the battery and remove from phone using Nylon pointer.

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Working Instruction, Mechanical

Battery Cover & Battery continued

Raise and remove battery

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Working Instruction, Mechanical

2.1.2 Speaker Cover

Insert guitar pick as shown in the picture.

Using guitar pick push speaker cover outwards from the phone.

Using finger lift speaker cover upwards as shown in picture.

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Working Instruction, Mechanical

2.1.3 Front Cover

Use torx bit no. 6 to remove these four screws.

Insert the guitar pick as shown in picture

Slide the guitar pick along the bottom of the phone to unlatch snap hooks

Slide guitar pick along the side of the phone then follow round to the other side of phone unlatching all snap hooks as shown in picture.

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Working Instruction, Mechanical

Front Cover continued

Grip at the bottom then lift front cover upwards from the top end of phone.

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Working Instruction, Mechanical

2.1.4 Keypad

Overview of inner part of phone.

Remove keypad by using tweezers.

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Working Instruction, Mechanical

2.1.5 PCBA

Use JCIS bit no to remove the screw.

Use the Nylon pointer and insert at the bottom and raise the PCBA upwards as shown in picture.

Grip at the side and lift the PCBA away from the phone.

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Working Instruction, Mechanical

3 Replacements

Search for the part to be replaced on the Contents page and go to that instruction to be found in this Replacements section.

The instruction usually begins by directing you to the Disassembly section with a specification of the instructions you have to carry out in order to disassemble the phone as far as needed before the actual replacement.

Go back to this Replacements section and carry out the instruction. The instruction usually ends by directing you to the Reassembly section with a specification of the

instructions you have to carry out in order to reassemble the phone.

REPLACEMENTS

Start

Contents

page

DISASSEMBLY REASSEMBLY

Done

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Working Instruction, Mechanical

3.1 Battery Cover

Follow the 2.1.1 Disassembly instructions! Prepare the new battery cover. Follow the 4.1.5 Reassembly instructions!

3.2 Speaker Cover

Follow the 2.1.2 Disassembly instructions! Prepare the new speaker cover. Follow the 4.1.4 Reassembly instructions!

3.3 Front Cover

Follow the 2.1.1 – 2.1.3 Disassembly instructions! Prepare the new front cover. Follow the 4.1.3 – 4.1.5 Reassembly instructions!

3.4 Keypad

Follow the 2.1.1 – 2.1.4 Disassembly instructions! Prepare the new keypad. Follow the 4.1.2 – 4.1.5 Reassembly instructions!

3.5 PCBA

Follow the 2.1.1 – 2.1.5 Disassembly instructions! Prepare the new PCBA. Follow the 4.1.1 – 4.1.5 Reassembly instructions!

3.6 Back Cover

Follow the 2.1.1 – 2.1.5 Disassembly instructions!

Prepare the new back cover. Install the vibrator, music, camera, volume & power keys.

Follow the 4.1.1 – 4.1.5 Reassembly instructions!

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Working Instruction, Mechanical

3.7 Co-brand Label

REMOVAL

Use dentist hook to loosing the co-brand label.

Lift co-brand off with tweezers.

Remove any glue found in co-brand area of the phone.

INSTALLATION

1. Position co-brand into place using the corner as placement guide.

2. Using tweezers place the co-brand label onto the phone.

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Working Instruction, Mechanical

Co-brand Label continued

Use fingers to secure the co-brand label.

It should look like this.

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