My Nokia Hardware Repairing Technics - Page 3 - GSM-Forum

SHIJILFONOTLY · 09-17-2008, 13:26

Quote:

Originally Posted by rashad-a

6234 nokia 1st problem memory card not accepte i heat memory card ic after chek .. display wight screen phone is ok i have change 2 display ic but same problem please help urgent.....

brother remove 2 MMC realted ESD filter then check

rashad-a · 09-18-2008, 10:29

2600c keypad problem select exit up down bottens i have change key pad ic but same problem ?

pupaji · 09-18-2008, 11:10

Quote:

Originally Posted by rashad-a

2600c keypad problem select exit up down bottens i have change key pad ic but same problem ?

did you change keypad??????also check connector.

SHIJILFONOTLY · 09-18-2008, 15:00

Quote:

Originally Posted by rashad-a

2600c keypad problem select exit up down bottens i have change key pad ic but same problem ?

brother check or chnage keypad connector or keypad unit
same problem again?change keypad ic
post result

riyaz5016 · 09-19-2008, 07:55

Quote:

Originally Posted by SHIJILFONOTLY

NOKIA 6230,6230i NETWORK PROBLEM UPDATED
6230,6230i NONET WORK FOUND PROBLEM SOLVED CHANGING THIS CAPACITOR

THIS LAST MONTH AM SOLVED ABOVE 35 HANDSETS

REGARDS,
NOKIA.REPAIR.MASTERS TEAM

hi 6230i NO NET WORK FOUND PROBLEM help me

neilthirumuttam · 09-19-2008, 10:45

Quote:

Originally Posted by riyaz5016

hi 6230i NO NET WORK FOUND PROBLEM help me

Is the set says no network found within a short time ?
or
only after a long duration search ?
these two symptoms have to be treated in different ways

with in short time it says no network found , we have to
trace the beginning stages of receiving side kike antinna ,
contacts, antina switch and associated parts in RF block

if the case is said as in the later one
we had to suspect the demodulation section or decoding procedure, or any
corruption in operating system may also result in network related errors

so just do self test in either jaf or ufs
u can understand situation better
anyway try and stay tuned with this thread
regards,

NEIL

broken_rules · 09-19-2008, 12:28

Sir,
ihv a N70 Rcvd White light ..( incoming Outgoing working ),,,
then i applied low heat on Display crystal ic..& after that Set Is dead..So Sir plzz help me

SHIJILFONOTLY · 09-19-2008, 13:15

Quote:

Originally Posted by broken_rules

Sir,
ihv a N70 Rcvd White light ..( incoming Outgoing working ),,,
then i applied low heat on Display crystal ic..& after that Set Is dead..So Sir plzz help me

brother,both display emi heated?
right emi inside on/off ways
pls insert charger this time phone light trun on
sure that ic damaged
u must change display EMI(2Nos)
post result

gsm_research · 09-20-2008, 09:03

Nokia 7610 keypad LED off. Any solution?

SHIJILFONOTLY · 09-20-2008, 13:12

Quote:

Originally Posted by gsm_research

nokia 7610 keypad led off. Any solution?

bro,display light okey?
Problem only keypad?

ashokkumohanty · 09-23-2008, 19:01

dear brother 1110i power off after 5 second of switch on ,i have flashed with jaf with latest version software but no result ,please
help me

SHIJILFONOTLY · 09-24-2008, 05:16

Quote:

Originally Posted by ashokkumohanty

dear brother 1110i power off after 5 second of switch on ,i have flashed with jaf with latest version software but no result ,please
help me

bro,u mean after 5 second phone restarted or trun off?

neilthirumuttam · 09-24-2008, 07:54

What is local mode?

Local mode is triggered either by a service battery / jig from Nokia being used to power the phone,
A faulty battery, a faulty phone or the phone has got "liquid ingress” also indicate local mode in display

See this picture

s in the above picture when BSI is grounded with a resistor of
5.1k to 7k1 and insert battery, nokia sets displays local/test mode on screen

By this way we can trigger the set in to local mode and software operation through USB

Local mode is triggered for reading & writing phone pm area (EEPROM),
File system formatting etc.

What is test mode?

Test mode is for doing file system removing like full factory defaults
Also can do pm area re-writing and for unlocking the phone

Some phones displays either of these modes directly when battery is inserted to the phone
and we gets in this condition for repairing

This may be either by a faulty battery or damaged hardware in the handset.
We can assume this is a BSI related fault

TEST THE PHONE WITH A WORKING BATTERY

Now what is BSI?

BSI, the thermistor used to sense the battery temperature and shut down the charger
Their is an internal circuit from power IC to BSI lead of battery
this circuit manages charging mechanism and battery sensing.

Faulty parts in this BSI circuit may lead to the local/test mode

Or finally we have to suspect power ic

Here NOKIA 1200 schematic is used to illustrate BSI way and possible reasons for this fault.

he blue colored parts are related to the BSI function .we have to trace from battery connector, capacitors, and then other parts. These parts can be identified by reading the higher level schematic of the phone. By following this logic you may be able to trace local mode in any nokia phone

with regards,
NEIL
nokia repair master team

ashokkumohanty · 09-24-2008, 10:13

brother after 5 second phone turh off

SHIJILFONOTLY · 09-24-2008, 10:18

Quote:

Originally Posted by ashokkumohanty

brother after 5 second phone turh off

Brother try to full erase flash memory then flash lastest version with pm
same problem again open handset then clean and wash PCB
this cause mainly UEM or RPL problem
post result

09-24-2008, 07:54	#43 (permalink)
neilthirumuttam No Life Poster Join Date: Sep 2002 Location: KERALA, india Age: 56 Posts: 1,237 Member: 15903 Status: Offline Sonork: 100.1583162 Thanks Meter: 1,046	Local mode problem & test mode problem, some general facts What is local mode? Local mode is triggered either by a service battery / jig from Nokia being used to power the phone, A faulty battery, a faulty phone or the phone has got "liquid ingress” also indicate local mode in display See this picture s in the above picture when BSI is grounded with a resistor of 5.1k to 7k1 and insert battery, nokia sets displays local/test mode on screen By this way we can trigger the set in to local mode and software operation through USB Local mode is triggered for reading & writing phone pm area (EEPROM), File system formatting etc. What is test mode? Test mode is for doing file system removing like full factory defaults Also can do pm area re-writing and for unlocking the phone Some phones displays either of these modes directly when battery is inserted to the phone and we gets in this condition for repairing This may be either by a faulty battery or damaged hardware in the handset. We can assume this is a BSI related fault TEST THE PHONE WITH A WORKING BATTERY Now what is BSI? BSI, the thermistor used to sense the battery temperature and shut down the charger Their is an internal circuit from power IC to BSI lead of battery this circuit manages charging mechanism and battery sensing. Faulty parts in this BSI circuit may lead to the local/test mode Or finally we have to suspect power ic Here NOKIA 1200 schematic is used to illustrate BSI way and possible reasons for this fault. he blue colored parts are related to the BSI function .we have to trace from battery connector, capacitors, and then other parts. These parts can be identified by reading the higher level schematic of the phone. By following this logic you may be able to trace local mode in any nokia phone with regards, NEIL nokia repair master team

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09-18-2008, 10:29	#32 (permalink)
rashad-a Freak Poster Join Date: Dec 2007 Location: india Posts: 150 Member: 662585 Status: Offline Thanks Meter: 52	2600c keypad problem select exit up down bottens i have change key pad ic but same problem ?

09-19-2008, 12:28	#37 (permalink)
broken_rules Freak Poster Join Date: Feb 2008 Location: In heart Of ``HINDUSTAN`` Age: 37 Posts: 220 Member: 698819 Status: Offline Thanks Meter: 122	Sir, ihv a N70 Rcvd White light ..( incoming Outgoing working ),,, then i applied low heat on Display crystal ic..& after that Set Is dead..So Sir plzz help me

09-20-2008, 09:03	#39 (permalink)
gsm_research Insane Poster Join Date: Nov 2005 Location: Bangladesh Age: 44 Posts: 75 Member: 201084 Status: Offline Thanks Meter: 7	Nokia 7610 keypad LED off. Any solution?

09-23-2008, 19:01	#41 (permalink)
ashokkumohanty Junior Member Join Date: Jun 2008 Location: rourkela,orissa Posts: 13 Member: 787399 Status: Offline Thanks Meter: 9	dear brother 1110i power off after 5 second of switch on ,i have flashed with jaf with latest version software but no result ,please help me

09-24-2008, 10:13	#44 (permalink)
ashokkumohanty Junior Member Join Date: Jun 2008 Location: rourkela,orissa Posts: 13 Member: 787399 Status: Offline Thanks Meter: 9	brother after 5 second phone turh off