2505 (RM-307)
Nokia Customer Care
General Repair Hints
This section provides general hints on repairs:
Read the tutorials or user guide on www.Nokia.com > Choose your location >
Support > Product Support. Select the appropriate mobile terminal model to
become familiar with the Nokia product.
y Take adequate ESD precautions before starting repairs, e.g. work in an ESD
Protected Area, and that an anti-static wrist strap is worn.
y Use gloves to avoid corrosion and fingerprints.
y Protect windows and displays with a film to avoid dust and scratches.
y Use a lint-free cloth when cleaning the LCD module (e.g. Micro-Fiber cloth).
y Use a soft cloth/ESD brush and Isopropanol when cleaning the pads. Do not
use a glass fiber pencil as it will scratch the surface and will lead to corrosion.
y Reuse mechanical parts that are not soldered if they did not repair the failure
(except shielding lids and bent parts).
y Make sure to replace the shielding lids with new ones when removing them,
so that the high-frequency leakage does not affect the device.
y Always use original Nokia spare parts.
y Check the soldering joints of the parts causing problems (e.g. soldered
connectors or switches) and resolder them if necessary (Level 2 only).
y Remove redundant soldering flux after repair.
y Meet the torque requirements when assembling the terminal (see also
"Torques for transceiver assembly" document found on Nokia Online).
y Always use properly functioning test equipment to test to be sure if it is the
mobile terminal and not faulty equipment causing the malfunction.
y A UIM card is required for all Go-No-Go tests.
y Make a note of the Item code causing the malfunction when making fault log
entries. Also complete the appropriate part code from the assembly if
needed.
y Note that some malfunctions could be software related and resolved by a
software update.
y Refer to additional documents available on Nokia Online (NOL).
Note: Check Nokia Online (NOL) for latest news and files on a regular basis.
Issue 1 04/2007 © 2007 Nokia Corporation Company Confidential Page 11
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