Nokia 300 User manual

Nokia Asha 300
RM-781
Service Manual Level 1&2
1
Co nf id e nt ial | C o p yr ig ht © 2011Nokia |A ll rights reserved
V e r s io n 1 .0
SERVICE MANUAL
Level 1&2
Nokia Asha 300
RM-781
Transceiver characteristics
Band
WCDMA 850/900/1900/1900/2100
GSM850/900/1800/1900
Display
Monoblock Touch and Type 2.4” resistive
touch display (240 x 320 pixels)
Camera
5 Mpix full focus EDoF
Operating Syste m
S40
Connections:
Micro USB 2.0
3.5mm AV jack
2.0mm DC jack
Bluetooth
HSPA
Transceiver with BL-4U battery pack
Talk time Standby
GSM:
Up to 6,9h
WC DMA:
Up to 4,3h
GSM:
Up to 55 0h
WC DMA:
Up to 597h
Note:
Talk times are dependent on network
parameters
and phone settings

Nokia Asha 300
RM-781
Service Manual Level 1&2
2
Co nf id e nt ial | C o p yr ig ht © 2011Nokia |A ll rights reserved
V e r s io n 1 .0
Table of contents
1. COPYRIGHT..........................................................................................................................................................................4
2. WARNINGS AND CAUTI ONS.............................................................................................................................................5
2.1 WARNINGS.................................................................................................................................................................5
2.2 CAUTI ONS...................................................................................................................................................................5
3. ESD PROTECTION ...............................................................................................................................................................6
4. CARE AND MAI NTENANCE ................................................................................................................................................7
5. BATTERY INFORMATION...................................................................................................................................................8
6. EXPLODED VIEW.................................................................................................................................................................9
7. SERVICE DEVICES ................................................................................................................................................................10
8. SOFT WARE UPD ATE...........................................................................................................................................................11
9. DISASSEMBLY INSTRUCTIONS.........................................................................................................................................12
10. ASS EMBLY HI NTS................................................................................................................................................................19
11. SOLDER COMPONENTS ......................................................................................................................................................20

Nokia Asha 300
RM-781
Service Manual Level 1&2
3
Co nf id e nt ial | C o p yr ig ht © 2011Nokia |A ll rights reserved
V e r s io n 1 .0
CHANGE HISTORY
Sta tus
Version No.
Date
C omments
Approved
1.0
26.10.2011
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
[e-mail]
Please keep in mind also that this documentation is continuously being updated and modified,
so watch always out for the newest version.

Nokia Asha 300
RM-781
Service Manual Level 1&2
4
Co nf id e nt ial | C o p yr ig ht © 2011Nokia |A ll rights reserved
V e r s io n 1 .0
1. COPYRIGHT
Copyright © 2011 Nokia. All r ights 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 r ight to revise this
document or withdraw it at any time without prior notice.
The availability of particular products may vary by region.
I MPORT ANT
This document is intended for use by qualified service personnel only.

Nokia Asha 300
RM-781
Service Manual Level 1&2
5
Co nf id e nt ial | C o p yr ig ht © 2011Nokia |A ll rights reserved
V e r s io n 1 .0
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:
2.1 Warnings
1. CARE MUST BE TAKEN ON INSTALLATION IN VEHICLES FITTED WITH ELECTRONIC ENGINE
MAN AGEMENT 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.
2.2 Cautions
1. Servicing and alignment must be undertaken by qualified personnel only.
2. Ensure all work is carried out at an anti–s ta tic worksta tio n and tha t an anti–static wris t
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