CONFIDENTIAL 1 (4)
Nokia Mobile Phones Service Bulletin No. SB-005/14.09.00
Technical Support, Europe & Africa
NPE-3
SPECIAL COMPONENT HANDLING
CSP - µBGA pac kages
MicroBGA (CSP) in NPE-3 products are moisture and electrostatic sensitive
components, which need to be handled in a special way. CSP components
soldering needs also special MicroBGA soldering station!!!
When any CSP components is replaced it must first be baked using a high
temperature device container at 125 Celsius for 24 hours prior to assembly. If
baking operation is not performed then the soldering process may not be
successful, and the CSP component might suffer internal stress, and
eventually break down.
Standby for soldering temperature in oven for CSP should be 60° C
continuously. Components should not be baked more than once if using the
high temperature bake of 125° C for 24 hours.
Spare parts stock of CSPs must be stored in a sealed ESD protected
(metallized) plastic bag and handled as electrostatic sensitive components.
They must be stored according to following requirements:
Relative Humidity: 15% - 70% RH0
Temperature: -5°C - +40°C
Sulphur dioxide average 0.3 mg/m3
Sulphured hydrogen average 0.1 mg/m3
CSP components have 12 months shelf life after sealing date in vacuum pack.
Precautions have to be taken when handling the component, like do not touch
the component with bare hands, and always wear a grounded wrist or leg
band.
Affected items (CSP packages) in NPE-3
NPE-3 SB-005
CODE DESCRIPTION
4340597 FLASH 2MX16 115NS 2.7V B3 UBGA48
4340787 SRAM 512KX8 100NS 2.7-3.3 CSP48
4370719 CCONT2I WFD163KG64T/8 LFBGA8X8
4370621 CHAPS V2.0 U423V20G36T LBGA6X6
4370643 Cobba_GJP BGA64
4370667 HAGAR 3 STTZA8HG80T LFBGA80
CONFIDENTIAL 2 (4)
Other packages (TSSOP, TQFP, SOT 23, SOT 323 … etc.)
All Surface Mounted components in NPE-3 must be handled as electrostatic
sensitive components. They must be stored in a sealed ESD protected
(metallized) plastic bag or in Tape and Reel and according to following
requirements:
Relative Humidity: 15% - 70% RH
Temperature: -5°C - +40°C
Sulphur dioxide average 0.3 mg/m3
Sulphured hydrogen average 0.1 mg/m3
Manual Hot Gas Soldering:
Max. air temperature: +270°C
Max. air velocity: 10m/s
Max. exposure time: 30s.
Manual Soldering with Soldering Iron:
Tip diameter: Selected to fit appli cati o n
Max. Tip temperature: +270°C
Max. exposure time: 5s
Do not touch the component directly with soldering iron.
Do not touch the component with bare hands, and always wear a grounded
wrist or leg band.
Affected items (for other packages than CSP packages):
CODE DESCRIPTION
4350223 VCO 3420-3840MHZ
4350219 PW AMP
4511095 SAW TX 900 U/U
4511185 SAW RX 900 U/U
4511129 SAW RX 1800 U/U
4550067 RX/TX Switch
4510261 VCTCXO 26MHz
4210271 GSM LNA transistor
4210275 PCN LNA transistor
4510293 CRYSTAL
4864291 LED
4864301 LED
5409145 SIM CONNECTOR
4850147 LCD-module
5140189 BUZZER+SPRING
NPE-3 SB-005
CONFIDENTIAL 3 (4)
Speaker
Do always store the speaker in the tray.
The tray is designed to fix the speaker, with a minimum spacing to avoid
snapping together and the only secure way to handle them in larger
quantities.
Avoid touching the membrane.
The Membrane is a 20µm thin film with a well-defined shape, which must not
be changed. It is obviously, that very small forces are able to affect the shape
of the membrane in reversible. Such deformations can be seen in most cases
viewing the membrane against light using it as a mirror.
Avoid snapping together of speakers
Due to magnetic forces the speakers like to snap together when they are
placed to close, e.g. at Service Centres, in boxes without tray or when a pile
of trays is shocked by rigid handling. When snapped together the contacts of
one speaker are pressed into the membrane of the other one - see above.
This is the most likely case for damaged membranes / poor performance of
the speaker. So when ever there are speakers snapped together they have to
be considered as scrap.
So it is recommendable to put speakers back to a tray whenever they are
taken out of the phone due to maintenance / repair actions.
How to handle the speaker
- by using the magnetic field to fix them to an iron sheet
- manually by touching the outside diameter
- by gently pressing the backside - avoid deformation of spring contacts to a
height of less than 1 mm above speaker housing rim
RTC battery
The RTC battery must be kept in the original packing until used. Be careful not
to bend the terminals. To ensure best possible contact between the battery
and the PCB pads, do not touch the terminals with bare hands. Do not use
metal tweezers to handle the battery, as this will short-circuit the battery!
Elastomer (LCD connector)
The elastomer must be kept in the original packing until used. Do not touch
the elastomer with bare hands, as this will decrease the long-term
performance.
The storage conditions are -40°C - +85°C.
NPE-3 SB-005
CONFIDENTIAL 4 (4)
Mechanical parts
All parts must be stored in the originally packaging whether it is Tape and
Reel, Trays, Boxes or other similar packages and should stay there until use.
Recommended NMP storage conditions are 25°C + 5°C and relative humidity
of 30%-60%.
Please be aware that parts that needs to be soldered onto the PCB (Shields)
have to be stored in such a way that the parts keep the Coplanarity.
Determination of coplanarity: deviation between all solderable areas/leads and
seating plane (seating plane = reference plane formed by three lowest contact
points when component lies on flat surface by its own weight).
Coplanarity specificatio n: deviation max 0.15mm.
Affected NPE-3 mechanical parts
CODE DESCRIPTION
9790383 Keymat
9517054 BB Shield Assy
0660197 ANTENNA (internal)
0670268 Battery Pack BLS2N
NPE-3 SB-005
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