SERVICE MANUAL
Level 1&2
RM-645
Transceiver characteristics
Band:
HSDPA/HSUPA, WCDMA 900/2100 +  GSM/EDGE 850/900/1800/1900
Display:
QVGA (240 x 320 pixels) 2.2” screen up to 16.7 M colors
Camera:
3.2 Mpix  with Full Focus EDOF module
Operating System:
Symbian ver. 9.3
Connections:
Bluetooth wireless technology 2.1 interface 3.5 mm AV connector
service fault
Micro A/B USB 2.0 high speed
USB Charger
GPS, Maps 3.0 with Lifecaster
Transceiver with BL-5CT battery pack
Talk time  Standby
GSM:
12 hours
WCDMA:
4.9 hours
GSM:
630 hours
WCDMA:
670 hours
Note: Talk times are dependant on network parameter settings.
Table of Contents
Change history (3)
1. Copyright (4)
2. Warnings and cautions (5)
2.1 Warnings (5)
2.2 Cautions (5)
3. ESD protection (6)
4. Care and maintenance (7)
5. Battery information (8)
6. Exploded view (9)
7. Service devices (10)
8. SW-update (11)
9. Disassembly instructions (12)
10.  Assembly Hints (18)
11.  Solder Components (19)
CHANGE HISTORY
Status  Version No.  Date  Comments
Approved    1.0    5.3.2010
The purpose of this document is to help NOKIA service levels 1 and 2 workshop technicians to
carry out service to NOKIA products. This Service Manual is to be used only by authorized NOKIA
service suppliers, and the content of it is confidential. Please note that NOKIA provides also other
guidance documents (e.g. Service Bulletins) for service suppliers, follow these regularly and
comply with the given instructions.
While every endeavor has been made to ensure the accuracy of this document, some errors may
exist. If you find any errors or if you have further suggestions, please notify NOKIA using the
address below:
Nokia Care Academy
mailto:Service.Manuals@nokia
Please keep in mind also that this documentation is continuously being updated and modified,
so watch always out for the newest version.
1.COPYRIGHT
Copyright © 2010 Nokia. All rights reserved.
Reproduction, transfer, distribution or storage of part or all of the contents in this document in
any form without the prior written permission of Nokia is prohibited.
Nokia, Nokia Connecting People, and Nokia X and Y are trademarks or registered trademarks of
Nokia Corporation. Other product and company names mentioned herein may be trademarks or
tradenames of their respective owners.
Nokia operates a policy of continuous development. Nokia reserves the right to make changes
and improvements to any of the products described in this document without prior notice.
Under no circumstances shall Nokia be responsible for any loss of data or income or any special,
incidental, consequential or indirect damages howsoever caused.
The contents of this document are provided “as is”. Except as required by applicable law, no
warranties of any kind, either express or implied, including, but not limited to, the implied
warranties of merchantability and fitness for a particular purpose, are made in relation to the
accuracy, reliability or contents of this document. Nokia reserves the right to revise this
document or withdraw it at any time without prior notice.
The availability of particular products may vary by region.
IMPORTANT
This document is intended for use by qualified service personnel only.
2.WARNINGS AND CAUTIONS
Please refer to the phone’s user guide for instructions relating to operation, care and
maintenance including important safety information. Note also the following:
2.1Warnings
1.CARE MUST BE TAKEN ON INSTALLATION IN VEHICLES FITTED WITH ELECTRONIC ENGINE
MANAGEMENT SYSTEMS AND ANTI–SKID BRAKING SYSTEMS. UNDER CERTAIN FAULT CONDITIONS,
EMITTED RF ENERGY CAN AFFECT THEIR OPERATION. IF NECESSARY, CONSULT THE VEHICLE
DEALER/MANUFACTURER TO DETERMINE THE IMMUNITY OF VEHICLE ELECTRONIC SYSTEMS TO RF
ENERGY.
2.THE HANDPORTABLE TELEPHONE MUST NOT BE OPERATED IN AREAS LIKELY TO CONTAIN
POTENTIALLY EXPLOSIVE ATMOSPHERES, EG PETROL STATIONS (SERVICE STATIONS), BLASTING
AREAS ETC.
3.OPERATION OF ANY RADIO TRANSMITTING EQUIPMENT, INCLUDING CELLULAR TELEPHONES, MAY
INTERFERE WITH THE FUNCTIONALITY OF INADEQUATELY PROTECTED MEDICAL DEVICES. CONSULT
A PHYSICIAN OR THE MANUFACTURER OF THE MEDICAL DEVICE IF YOU HAVE ANY QUESTIONS.
OTHER ELECTRONIC EQUIPMENT MAY ALSO BE SUBJECT TO INTERFERENCE.
2.2Cautions
1.Servicing and alignment must be undertaken by qualified personnel only.
2. Ensure all work is carried out at an anti–static workstation and that an anti–static wrist
strap is worn.
3.Use only approved components as specified in the parts list.
4.Ensure all components, modules screws and insulators are correctly re–fitted after servicing
and alignment.
5.Ensure all cables and wires are repositioned correctly

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