General Repair Information - Nokia 3300 Service Manual

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C P
ONNECTING EOPLE
Nokia Mobile Phones Customer Care EMEA
Technical Services, Repair Concepts

GENERAL REPAIR INFORMATION

4.
In this section the technician will get some general hints how to carry out repairs:
o Before starting the repair you must take care of ESD precautions like being in your ESD Protected
Area and connecting your wristband.
o Use gloves to avoid corrosion and fingerprints.
o Protect windows and displays with a foil to avoid dust and scratches.
o When cleaning the pads you have to use a soft cloth/ESD brush and Isopropanol. It is not allowed to
use a glass fiber pencil because it scratches the surface and will lead later on to corrosion.
o Mechanical parts (except shielding lids), which didn't repair the failure, can be reused, if they are not
soldered.
o When removing the shielding lids make sure to replace them with new ones, otherwise the high-
frequency leakage can have an influence on the device.
o Use always original Nokia spare parts.
o Check the soldering joints of the parts which are concerned regarding the indicated error
(e.g. soldered connectors or switches) and resold them if necessary (Level 2 only).
o Remove redundant soldering flux after repair.
o Meet the torque requirements when assembling the unit (see also the document "torques for
transceiver assembly" on Nokia Partner Web Site).
o Always use your own equipment for testing where you are sure that it works. E.g. if the customer
complains about charger function, please test the phone with your own charger to be sure if phone
or charger causes the malfunction.
o When doing the Faultlogger entries, always note the Item code, which caused the malfunction. Also,
fill in the appropriate part code from the assembly, if needed.
o Please be aware that some malfunctions could be software related and solved by an update.
Following General Service Bulletins have to be followed:
SB-027: Original Nokia Accessories
SB-055: Common notice for good ventilation
SB-089: Don't try to repair prototypes (indicated on Type Label).
SB-107: Be sure that you have minimum hardware requirements in place.
SB-115: Handling of liquid damages.
SB-121: Return the defective part, if one of your service tools causes malfunction.
SB-122: Soldering with manual hot air gun is totally forbidden because of the very sensitive µBGA
components and µVia technology.
SB-124 Service Policy for packaging serviced products
SB-131: Check these guidelines when refurbishing products.
SB-148: Improvements To Faultlog Reporting Tool
SB-156: Packing Material
Please check Nokia Partner Web Site (PWS) for latest news and files on a regular basis.
Service Manual 3300 Level 1&2
PAGE 10 (21)
Confidential
Copyright 2003 © Nokia Corporation
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17.06.2003