Page 1
CONFIDENTIAL 1 (4)
Nokia Mobile Phones Service Bulletin No. SB-003/26.09.01
Technical Support, Europe & Africa
NHM-7
UPDATED!! SPECIAL COMPONENT HANDLING FOR NHM-7
CSP - µBGA Packages
MicroBGA (CSP) in NHM-7 products are moisture and electrostatic sensitive
components, which need to be handled in a special way.
Note: 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 125ºC 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.
- Relative Humidity: 15% - 70% RH0
- Temperature: -5°C ± 40°C
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 NHM-7 Items (CSP Packages):
4120071 ASIP EMIF03-10002BF1 RES+TVS BGA8 0.5 mm pitch, humid. sensitive
4120031 EMI/ESD FILT EMIF10-1K010F1 BGA24 0.5 mm pitch, humid. sensitive
4340835 FLASH 4MX16 85/14NS 1.8V UBGA40 0.5 pitch, humid. sensitive
4370731 HAGAR 4 STTZA8IG80T LFBGA80 humid. sensitive
4370815 UPP8M V1.1 F741987A C05 UBGA144 humid. sensitive
4370805 UEM V4.3 W-DOG ENA TO09H TFBGA168 0.8 pitch, humid. sensitive
4350297 PW AMP RF9203E9.2 900/1800MZ 3.5V Humid. Sensitive JEDEC
LEVEL 4
NHM-7 SB-003
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CONFIDENTIAL 2 (4)
Other Packages:
TSSOP, TQFP, SOT 23, SOT 323 … etc.
All Surface Mounted components in NHM-7 must be handled as electrostatic
sensitive components.
They must be stored in a sealed ESD protected (metallized) plastic bag or in
Tape and Reel:
- Relative Humidity: 15% - 70% RH
- Temperature: -5°C ± 40°C
Manual Soldering with Soldering Iron:
Tip diameter: Selected to fit application
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 NHM-7 Items:
3645065 CHIP COIL 5N6 K Q98/1.5GHZ 0805 Storage: in air tight package 3
months or in vacuum package 6
months
3645207 CHIP COIL 56NH G Q38/200MHZ 0603 Storage: in air tight package 3
months or in vacuum package 6
months
3645327 CHIP COIL 72N G Q34/150MHZ 0603 Storage: in air tight package 3
months or in vacuum package 6
months
4110931 CAPDIX2 BBY66-05 CT=5.5 FM SOT23 If other of diodes have to
change, change both, because
the both components have to be
same rank.
4210261 TR T525L5LNA 1.8GHZ SOT 363 Humid. Sensitive
4210277 TR BGB420 MIRROR ADJ BIAS
SOT343
4219937 TRX2 UMT1/PUMT1 P40V100MA
SOT363
4341023 TEA5757 AM/FM RECEIVER LQFP humid. sensitive (Jedec level 3)
4350243 VCO 3420-3840MHZ 2.7V 20MA Storage: in air tight package 3
4510275 VCTCXO 26MHZ+-5PPM 2.7V GSM Vacuum
4512133 ANT.SWIT.880-960/1710-1990MHZ
7X5
Humid. Sensitive
Humid. Sensitive
months or in vacuum package 6
months
Storage: in air tight package 3
months or in vacuum package 6
months
NHM-7 SB-003
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CONFIDENTIAL 3 (4)
4550099 CER.FILT 10.7+-0.0225MHZ Storage: in air tight package 3
months or in vacuum package 6
months
4550145 CER.FILT 10.7+-0.09MHZ/3 3.7X2.9 Storage: in air tight package 3
months or in vacuum package 6
months
4864543 LED CL270WB-D White 90’ VF < 4.0 V Solder As soon as possible after
unpacking
5200025 SM TACT SW SIDE TRAVEL 0.2 MM Storage: in air tight package 3
months or in vacuum package 6
months
5460049 Bottom connector Include microphone
9490306 UI module Include Display module
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 Centers, in boxes without tray or when rigid
handling shocks a pile of trays. 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.
NHM-7 SB-003
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
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CONFIDENTIAL 4 (4)
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!
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 25ºC± 5ºC 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 specification: deviation max 0.15 mm.
Affected NHM-7 Mechanical Parts:
9497016 A-cover assy, total
9497017 B-cover assy
9490175 Battery cover assy, total
9790433 Keypad
9490306 UI module
5460049 Bottom connector
NHM-7 SB-003
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