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CONFIDENTIAL
Copyright © 2007 NOKIA. All rights reserved.
N77 RM-194/RM-195
Page (35) ISSUE 1
Service Manual Level 1&2
In this section the technician will get some general hints how to carry out repairs:
To familiarize oneself with NOKIA product read the tutorials or user guide on www.nokia.com -->Support-->
Phones, by selecting the Phone Model.
Before starting the repair you must take care of ESD precautions like being in your ESD Protected Area and con-
necting your wristband.
Use gloves to avoid corrosion and fingerprints.
Protect windows and displays with a film to avoid dust and scratches.
When cleaning the LCD Module any lint-free cloth can be used (e.g. Micro-Fibre cloth).
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.
Mechanical parts (except shielding lids and bent parts), which didn’t repair the failure, can be reused, if they are
not soldered.
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.
Always use original NOKIA spare parts.
Check the soldering joints of the parts, which are concerned regarding the indicated error (e.g. soldered connec-
tors or switches) and resolder them if necessary (Level 2 only).
Remove redundant soldering flux after repair.
Meet the torque requirements when assembling the unit (see also the document “torques for transceiver as-
sembly” on NOKIA Partner Web Site/NOKIA Online).
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.
A SIM card is needed for all GoNoGo tests.
When doing the fault log entries, always note the Item code, which caused the malfunction. Also, fill in the ap-
propriate part code from the assembly, if needed.
Please be aware that some malfunctions could be software related and solved by an update.
There are several documents available on NOL, which have to be followed:
First, take care for the latest content pages of Service Bulletins, which are always available for each folder on
NOKIA Online. This is also important to recognize, if existing documents have become invalid.
The service level indicator at the bottom of each document tells the appropriate destination.
Downloads > Support Library >
1. Instructions
2. General Service Bulletins
3. Product related documents
4. Spare Part Service Bulletins
5. Service Tools Service Bulletins
6. Common Software Service Bulletins
etc,…
Use General SB-217 as a reference or overview.
Please also check NOKIA Online (NOL) for latest news and files on a regular basis.
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GENERAL REPAIR INFORMATION7.
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