Sony Ericsson J300 User manual

J300 Working Instructions - mechanical
3/00021-1/FEA 209 544/92 A
Company Internal Sony Ericsson Mobile Communications AB
Working Instructions -mechanical
Applicable for J300
Contents
1 Read this first!..........................................................................................2
2 Introduction ..............................................................................................3
3 Repair actions ..........................................................................................4
3.1 Battery Cover ass'y & Battery................................................................ 5
3.2 Front Cover (A-cover)............................................................................ 7
3.3 Bottom Cover ........................................................................................ 9
3.4 PBA with metal frame.......................................................................... 11
3.5 Metal Frame ass'y ............................................................................... 13
3.6 Receiver & Receiver Gasket ............................................................... 14
3.7 Receiver Holder (plastic frame)........................................................... 15
3.8 Display Module.................................................................................... 16
3.9 Dome Sheet ........................................................................................ 18
3.10 Protection Tape (under SIM-card)....................................................... 19
3.11 Water Indicator .................................................................................... 19
3.12 Microphone.......................................................................................... 20
3.13 Vibrator................................................................................................ 21
3.14 Speaker ............................................................................................... 22
3.15 Speaker Gasket................................................................................... 22
3.16 Speaker Dust Mesh............................................................................. 23
3.17 Frame ass'y ......................................................................................... 23
3.18 Joystick Plastic Cap ............................................................................ 24
3.19 Keypad ................................................................................................ 25
3.20 Front (co-brand) Label......................................................................... 25
4 Label........................................................................................................26
5 Revision history .....................................................................................27

J300 Working Instructions - mechanical
3/00021-1/FEA 209 544/92 A
Company Internal Sony Ericsson Mobile Communications AB
2(27)
1 Read this first!
After reading section 2 ‘Introduction’ and the first page of section 3 ‘Repair Actions’,
do as follows when a mechanical part needs to be replaced:
•Search for the part name on the contents page and go to the page number
where the instruction is found
•Disassemble the phone as far as needed by moving to the instructions stated as
e.g. Follow the Removal instructions of sections 3.1 – 3.6
•Carry out the actual repair action as described
•Assemble the phone by moving to the instructions stated as
e.g. Follow the Assembly instructions of sections 3.6 – 3.1 (pls. note the reverse order)
When watching the document on-line (connected to
CSPN), most of the Removal/Assembly headings are
blue-coloured and underlined.
By clicking on such a heading, an Internet Explorer
window opens, showing a video clip of the actual
removal/assembly.
To shrink the video window to its proper size, drag the
bottom right corner of the Internet Explorer until the video
is shown without blur and edges, which occurs when the
video window is approx. 12 x 9 cm (indicated by the red
frame in the adjacent picture).
When watching the document off-line (after downloading
and extracting the ZIP-file) and clicking on the heading,
this results in the start of a flash movie.
In this case the window size does not need to be adjusted.
The flash movie can be controlled from the keyboard by
holding down the Ctrl-key and pressing another key as
follows:
- Start and Stop: Ctrl – Enter
- Rewind to start position: Ctrl – R
- Move one small step forward: Ctrl – right arrow
- Move one small step back: Ctrl – left arrow
When watching the movies on-line as well as off-line, Flash Player ver. 6 or later
must be installed on the computer.
The Flash Player can be downloaded free of charge from www.macromedia.com.

J300 Working Instructions - mechanical
3/00021-1/FEA 209 544/92 A
Company Internal Sony Ericsson Mobile Communications AB
3(27)
2 Introduction
Special Tools
No new special tools are introduced but a few other
Sony Ericsson tools are required:
•NTZ 112 459 Torque screwdriver (or equivalent)
set to 10 Ncm ±6%
•NTZ 112 288 Torx bit no. 6
•NTZ 112 544 Snap opening tool
•NTZ 112 521 Flexfilm assembly tool
•NTZ 112 302/2 Front opening tool
Standard Tools
The following tools have to be locally purchased:
•Dentist hook
•Blunt pair of tweezers
ESD Equipment
Protect the phone from ESD damages whenever it has been opened by using:
•ESD-gloves (cotton gloves)
•ESD-wristband
Adhesives
Use a dentist hook or a blunt pair of tweezers to remove old adhesives.
If necessary, clean the surface with isopropyl alcohol before attaching new adhesives.
Cautions
•Keep all contact surfaces clean, no dirt or hand grease
•Be careful when using tools like the dentist hook, tweezers, opening tools etc. to avoid
scratches or damages to the exterior and interior parts of the phone
•Removed screws cannot be reused and must be scrapped
•Be careful not to damage the contact springs on parts like the receiver and vibrator
•Remember to remove the protection foils on new parts such as the front cover and
the display
•Never touch the display glass
•Use air blow equipment to keep the front window and display module dust free

J300 Working Instructions - mechanical
3/00021-1/FEA 209 544/92 A
Company Internal Sony Ericsson Mobile Communications AB
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3 Repair actions
FRONT & REAR VIEWS
PRECAUTIONARY ACTIONS
Turn off the phone!

J300 Working Instructions - mechanical
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Company Internal Sony Ericsson Mobile Communications AB
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3.1 Battery Cover ass’y & Battery
REMOVAL
Release the battery cover blocking element at the end of
the phone.
Lift battery cover up at the bottom and carefully release it
at the top to remove it from the frame.
Release the battery at the bottom and lift it up to remove it.
Turning the phone upside down will make it easier to get
the battery released.

J300 Working Instructions - mechanical
3/00021-1/FEA 209 544/92 A
Company Internal Sony Ericsson Mobile Communications AB
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Battery Cover ass’y & Battery continued
ASSEMBLY
Put the top of the battery into the frame cavity and press
on the bottom until it is in a secure position.
Hold the bottom of the battery cover in a raised position
and push the top into the frame.
Then fold down the bottom part.
Push on the battery cover blocking element at the bottom
of the phone to secure the locking of the battery cover.

J300 Working Instructions - mechanical
3/00021-1/FEA 209 544/92 A
Company Internal Sony Ericsson Mobile Communications AB
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3.2 Front Cover (A-cover)
REMOVAL
Follow the Removal instructions of section 3.1
Press with the snap opening tool on the top release
button (1) until you can see a small gap (2) between the
front cover and the frame.
Do not bend the front cover too much apart from the
frame!
Continue to press with your finger on the release button
until it becomes released from the front cover.
Gently wiggle the front cover side to side while pulling it
away from the frame.
Note that the keyboard may come loose from the front
cover.

J300 Working Instructions - mechanical
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Company Internal Sony Ericsson Mobile Communications AB
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Front Cover (A-cover) continued
ASSEMBLY
Check that the keyboard is in its proper position before
the assembly is begun!
Do not bend the front cover too much upwards!
Raise the front cover and slide it against the bottom cover.
Press down the release button with your finger,
and snap the front cover onto the frame.
Continue to press with your finger until the front cover is
completely locked by the button (1).
Make sure that there are no gaps around the phone (2).
If there still is a gap somewhere, gently press the two
halfs together with your fingers.
Follow the Assembly instructions of section 3.1

J300 Working Instructions - mechanical
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Company Internal Sony Ericsson Mobile Communications AB
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3.3 Bottom Cover
REMOVAL
Follow the Removal instructions of section 3.1 – 3.2
Use torx bit no. 6 to remove the two screws at the bottom
of the phone.
Carefully lift the bottom cover approximately 40º-45º with
your finger, this because of the hooks in the bottom
cover (1).
Pull the bottom cover away from the frame with your
fingers.

J300 Working Instructions - mechanical
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Company Internal Sony Ericsson Mobile Communications AB
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Bottom Cover continued
ASSEMBLY
Push the bottom cover with your fingers onto the frame in
a slight angle.
Apply 10 Ncm of torque when tightening two new screws
with torx bit no. 6.
Follow the Assembly instructions of sections 3.2 - 3.1

J300 Working Instructions - mechanical
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Company Internal Sony Ericsson Mobile Communications AB
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3.4 PBA with metal frame
REMOVAL
Follow the Removal instructions of sections 3.1 – 3.3
Use torx bit no. 6 to remove the two screws at the top of
the metal frame.
Be careful not to bend the PBA too much apart from the
frame!
Gently release the PBA and the metal frame from the two
snap fit hooks located in the middle of the frame with your
fingers.
Place the front opening tool in the position shown in the
picture and gently turn the tool until the PBA and the metal
frame are released from the frame.
If necessary, do the same thing on the opposite side.
Note that the speaker may fall out of the frame.
ASSEMBLY
Put the system connector of the PBA into the bottom of
the frame and then gently fold down the PBA into the
frame until it reaches the two guide pins at the top of the
frame (1).

J300 Working Instructions - mechanical
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Company Internal Sony Ericsson Mobile Communications AB
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PBA with metal frame continued
After putting the PBA and its metal frame properly into the
frame, they have to be secured.
Gently press the frame wall out to make it easier for the
metal frame to pass the hooks (1).
Then press the PBA and its metal frame against the frame
until they are snapped by the two hooks.
Check that the two hooks are securely holding the PBA
and metal frame as shown in the adjacent picture.
Apply 10 Ncm of torque when tightening two new screws
with torx bit no. 6.
Follow the Assembly instructions of sections 3.3 – 3.1

J300 Working Instructions - mechanical
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Company Internal Sony Ericsson Mobile Communications AB
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3.5 Metal Frame ass’y
REMOVAL
Follow the Removal instructions of section 3.1 – 3.4
Remove the metal frame from the PBA by lifting it up.
ASSEMBLY
Check that the display is in its proper position and fold the
metal frame down,
until the entire metal frame covers the display and the
PBA.
Follow the Assembly instructions of sections 3.4 – 3.1

J300 Working Instructions - mechanical
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Company Internal Sony Ericsson Mobile Communications AB
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3.6 Receiver & Receiver Gasket
REMOVAL
Follow the Removal instructions of sections 3.1 – 3.5
Gently bend with the dentist hook under the receiver until
it starts to become loose.
Remove the receiver by using the tweezers.
Never re-use an old receiver gasket!
Remove the receiver gasket with the dentist hook.
ASSEMBLY
Remove adhesive remains from the cavity!
Attach a new receiver gasket into the receiver holder with
the tweezers.
Do not press in the center of the receiver!
The receiver has to be mounted as shown in the picture!
Mount the receiver by using the tweezers or your fingers
and press gently until the receiver reaches the bottom of
the cavity.
Follow the Assembly instructions of sections 3.5 - 3.1

J300 Working Instructions - mechanical
3/00021-1/FEA 209 544/92 A
Company Internal Sony Ericsson Mobile Communications AB
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3.7 Receiver Holder (plastic frame)
REMOVAL
Follow the Removal instructions of sections 3.1 – 3.5
Gently bend with the tweezers between the metal frame
and the receiver holder until the holder is moved and then
remove it with your fingers.
ASSEMBLY
Slide the receiver holder onto the metal frame using your
fingers.
The picture shows a correctly mounted receiver holder, i.e.
you should be able to see through the two screw holes.
Follow the Assembly instructions of sections 3.5 – 3.1

J300 Working Instructions - mechanical
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Company Internal Sony Ericsson Mobile Communications AB
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3.8 Display Module
REMOVAL
Follow the Removal instructions of section 3.1 – 3.5
Gently lift the display module with your fingers or with the
flexfilm assembly tool.
Be most careful not to damage the FPC connector clamp
when opening it since the clamp may fall off, resulting in
a connector replacement to be done by electrical repair!
Open the FPC connector with the flexfilm assembly tool.
Remove the display module from the PBA.

J300 Working Instructions - mechanical
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Company Internal Sony Ericsson Mobile Communications AB
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Display Module continued
ASSEMBLY
Make sure the FPC connector clamp is open!
Gently slide the display flexfilm into the FPC connector by
hand.
Be most careful not to damage the FPC connector clamp
when closing it since the clamp may fall off, resulting in
a connector replacement to be done by electrical repair!
Close the FPC connector with the flexfilm assembly tool.
Follow the Assembly instructions of sections 3.5 – 3.1

J300 Working Instructions - mechanical
3/00021-1/FEA 209 544/92 A
Company Internal Sony Ericsson Mobile Communications AB
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3.9 Dome Sheet
REMOVAL
Follow the Removal instructions of sections 3.1 – 3.5
Remove the dome sheet with a dentist hook and tweezers.
ASSEMBLY
If necessary, clean the surface of the PBA with isopropyl
alcohol!
The dome sheet should be aligned to the markings and
the holes on the PBA!
Attach a new dome sheet with your fingers or tweezers by
starting with the upper part.
Follow the Assembly instructions of sections 3.5 – 3.1

J300 Working Instructions - mechanical
3/00021-1/FEA 209 544/92 A
Company Internal Sony Ericsson Mobile Communications AB
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3.10 Protection Tape (under SIM-card)
REMOVAL
Follow the Removal instructions of sections 3.1 – 3.4
Remove the protection tape by using a dentist hook and
tweezers.
ASSEMBLY
If necessary, clean the shield can lid with isopropyl
alcohol!
Attach a new protection tape with the tweezers.
Be careful with the tape alignment since the edge of the
tape must be in line with the edge of the shield can lid!
Follow the Assembly instructions of sections 3.4 – 3.1
3.11 Water Indicator
REMOVAL
Follow the Removal instructions of sections 3.1 – 3.4
Remove the water indicator by using a dentist hook.
ASSEMBLY
If necessary, clean the shield can lid with isopropyl
alcohol!
Attach a new water indicator.
Follow the Assembly instructions of sections 3.4 – 3.1

J300 Working Instructions - mechanical
3/00021-1/FEA 209 544/92 A
Company Internal Sony Ericsson Mobile Communications AB
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3.12 Microphone
REMOVAL
Follow the Removal instructions of sections 3.1 – 3.4
Gently bend the microphone up and away from the frame
with a dentist hook until it can be gripped and removed by
the tweezers.
ASSEMBLY
Use tweezers to the mount the microphone and press
gently until it reaches the bottom of the cavity.
Follow the Assembly instructions of sections 3.4 – 3.1