~~Next to Basic...Learn more & share More~~ - GSM-Forum

..:MumbaiGsm:.. · 10-30-2006, 11:25

Here is direct Practical tips which may helpful for begainer........and All
As i have seen threads for begainer, it seems that they are stopped at basic but now its time to grow with practical.
Learn more & Share more.........

This thread is more helpfull and i m trying to make it result oriented and you can gain much output...

Wbr..

..::MumbaiGsm::..

..:MumbaiGsm:.. · 10-30-2006, 11:39

But before start you should know atleast some basic parts.........by name will do..

PFO,Antena switch,Network IC,26MHz crystal,VCO,
Power Ic, Audio IC, RTC, charging ic,UEM, CPU, FLASH ic, RAM ic & logic IC

..:MumbaiGsm:.. · 10-30-2006, 11:42

Now a days all ICs are in the form of BGA(Ball Grid Array)
there are 3 types
1.DIP---dual in line package==which has both side legs...

2.QIP---Quad in line package===which has four side.

3.BGA
you will find it in diagrams,schematics,Pictures............

so work hard....Good Luck

Wbr...

..:MumbaiGsm:.. · 10-30-2006, 11:46

you should have atleast knowledge of how to measure voltage--and continuity..

As i consider all are familier with below Problems...
And we will learn it step by step
with Good Logic And Concepts of ALL Members

Dead handset----------short---open ----leakage

direct white light by inserting Battery.........

charging problem...

mic,speaker,ringer,vibrator,LED,display...........

keypad......Big problem that is of NETWORK

and software problem....contact service...contact retailer...hang...

You can add more...also

..:MumbaiGsm:.. · 10-30-2006, 11:54

start with dead hand set...Observe all board before start Repairing..its must,
Take your own time and try to identify , how handset becomes faulty..
And then Diagnostic.......Do it with Win Win Mentality..........ok

check all minor things that no need to mention here.......

like Battery voltage, battery connector..,batt.points on board. ok.

..:MumbaiGsm:.. · 10-30-2006, 11:55

check either handset is Short==open===leakage

short==check continuity by analog meter..at positive and negative terminal of board(PCB)
if meter shows deflection on both side means its SHORT...
If its one side full and other side slight deflect means LEAKAGE...
if its not any side means OPEN....
AND
if its one side only then proceed NEXT STEP its common and Applicable for All mobiles

topydrama77 · 10-30-2006, 12:11

hi
good work man keep it up

br
topydrma77

zahoor · 10-30-2006, 12:25

very good worke my friend.
specialy for those who have many exprince about repairing hw and sw but dont know about these basics same like me.
keep it up .
thanxxxxxx

zahoor · 10-30-2006, 12:26

i m under stand about short and leqeg but plz explain about open?

..:MumbaiGsm:.. · 10-30-2006, 12:52

OPEN circuit means you will not get continuity at positive & negative terminal..
its open
means circuit not completing

..:MumbaiGsm:.. · 10-30-2006, 12:54

Check voltage at on/off switch ---it should be @3.0~3.5v
if not then check track from power ic to on/off switch with the help of
diagrams,schematics,Pictures...

ok next

..:MumbaiGsm:.. · 10-30-2006, 12:55

Every hand set has FLASH Voltage which comes by pressing ON/OFF switch...
It should be more than 2.5v so now you have to find the exact point where it comes........
so its also possible by diagrams,schematics,Pictures...
check attachment for how to check flash voltage????????

wbr...

..::MumbaiGsm::..

baraka42 · 10-30-2006, 13:02

Quote:

Originally Posted by zahoor

i m under stand about short and leqeg but plz explain about open?

pcb has it own resistens. but when meter not deflect . it mean there is +v or -v. path is open from battery connector.

for easy like open fuse or open resister not shawn any deflaction.

i use digital multi meter to check pcb resistence.

put meter at diod check RANGE and RED PROB AT NEGATIVE BATTERY CONTEC AND BLACK PROBE AT +V. BATTERY CONTECT OF PCB .

FOR EXAMPLE. OK 3310 PHONE SHAW ABT 350 READING. IF IT WTER LOGED THEN IT MAY 250 TO 300. IF IT SHAW 00 OR BUZZ CONTINUEITY SOUND,IT MEAN SHORT CIRCUIT. AND NOT SHAW ANYTHING MEAN OPEN

YOU CAN CHECK ALL PHONE PCB BY THIS WAY . MAKE READING OF OK PHONE AND COMPAIR IT WITH FAULTY PHONE.

WBR

zahoor · 10-30-2006, 14:23

thanx man i m understanding.
its very usfull information.
keep it up.

zahoor · 10-30-2006, 14:31

can u explain sir about my this confiusion.
when i need to chek any dead pcb voltage then what i need to do.
4 exampel i need to attatch battry to pcd or just give it voltage with any voltage addaptor 3.7 volt.if have a simpel multi voltage addaptor then is i need to just output 3.7 volt to pcb or need to calculate ampeirs aswell.
b coz deferent addaptor or dc voltage suplaire gives deferent ampeires with dc volt.
i thing u will understand that what i want to say u.
thanx and sory 4 bad english.

View Poll Results: Hows the thread??like or not
about basic	2	66.67%
about concept and logic	2	66.67%
About parts	1	33.33%
u r upgrading or not?	2	66.67%
Multiple Choice Poll. Voters: 3. You may not vote on this poll

10-30-2006, 11:25	#1 (permalink)
..:MumbaiGsm:.. No Life Poster Join Date: Dec 2005 Posts: 790 Member: 205738 Status: Offline Thanks Meter: 129	~~Next to Basic...Learn more & share More~~ Here is direct Practical tips which may helpful for begainer........and All As i have seen threads for begainer, it seems that they are stopped at basic but now its time to grow with practical. Learn more & Share more......... This thread is more helpfull and i m trying to make it result oriented and you can gain much output... Wbr.. *..::MumbaiGsm::..*

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
More & More Power to E-Gold	PhoneCareCenter	SAGEM JTAG UNLOCKER	9	06-07-2008 16:08
Bb5 Ask To Rpl For Jaf & Mt.moto Via Imei.bb5 Tmobile Uk & Voda Uk And More...see	stanner_austin	Main Sales Section	0	06-22-2007 11:30
BB5 Ask To Rpl for JAF & Moto worldwide unlock codes (Fast Turnaround) & Much more!!!	viru	Main Sales Section	0	05-23-2007 23:58
02-04-2007 Next 3 updates released. More and More POWER every day!	GSMtricks	Multi-Box	15	04-02-2007 19:27
I want to learn more	mobwhizhead	Hardware Repair by brands	0	07-11-2002 05:35

10-30-2006, 11:39	#2 (permalink)
..:MumbaiGsm:.. No Life Poster Join Date: Dec 2005 Posts: 790 Member: 205738 Status: Offline Thanks Meter: 129	But before start you should know atleast some basic parts.........by name will do.. PFO,Antena switch,Network IC,26MHz crystal,VCO, Power Ic, Audio IC, RTC, charging ic,UEM, CPU, FLASH ic, RAM ic & logic IC

10-30-2006, 11:42	#3 (permalink)
..:MumbaiGsm:.. No Life Poster Join Date: Dec 2005 Posts: 790 Member: 205738 Status: Offline Thanks Meter: 129	Now a days all ICs are in the form of BGA(Ball Grid Array) there are 3 types 1.DIP---dual in line package==which has both side legs... 2.QIP---Quad in line package===which has four side. 3.BGA you will find it in diagrams,schematics,Pictures............ so work hard....Good Luck Wbr...

10-30-2006, 11:46	#4 (permalink)
..:MumbaiGsm:.. No Life Poster Join Date: Dec 2005 Posts: 790 Member: 205738 Status: Offline Thanks Meter: 129	you should have atleast knowledge of how to measure voltage--and continuity.. As i consider all are familier with below Problems... And we will learn it step by step with Good Logic And Concepts of ALL Members Dead handset----------short---open ----leakage direct white light by inserting Battery......... charging problem... mic,speaker,ringer,vibrator,LED,display........... keypad......Big problem that is of NETWORK and software problem....contact service...contact retailer...hang... You can add more...also

10-30-2006, 11:54	#5 (permalink)
..:MumbaiGsm:.. No Life Poster Join Date: Dec 2005 Posts: 790 Member: 205738 Status: Offline Thanks Meter: 129	start with dead hand set...Observe all board before start Repairing..its must, Take your own time and try to identify , how handset becomes faulty.. And then Diagnostic.......Do it with Win Win Mentality..........ok check all minor things that no need to mention here....... like Battery voltage, battery connector..,batt.points on board. ok.

10-30-2006, 11:55	#6 (permalink)
..:MumbaiGsm:.. No Life Poster Join Date: Dec 2005 Posts: 790 Member: 205738 Status: Offline Thanks Meter: 129	check either handset is Short==open===leakage short==check continuity by analog meter..at positive and negative terminal of board(PCB) if meter shows deflection on both side means its SHORT... If its one side full and other side slight deflect means LEAKAGE... if its not any side means OPEN.... AND if its one side only then proceed NEXT STEP its common and Applicable for All mobiles

10-30-2006, 12:11	#7 (permalink)
topydrama77 Insane Poster Join Date: Apr 2005 Location: PK>UK<hk>PK Age: 46 Posts: 92 Member: 137941 Status: Offline Thanks Meter: 2	hi good work man keep it up br topydrma77

10-30-2006, 12:25	#8 (permalink)
zahoor Insane Poster Join Date: Jul 2004 Location: lahore+bradford Posts: 70 Member: 74239 Status: Offline Thanks Meter: 0	very good worke my friend. specialy for those who have many exprince about repairing hw and sw but dont know about these basics same like me. keep it up . thanxxxxxx

10-30-2006, 12:26	#9 (permalink)
zahoor Insane Poster Join Date: Jul 2004 Location: lahore+bradford Posts: 70 Member: 74239 Status: Offline Thanks Meter: 0	i m under stand about short and leqeg but plz explain about open?

10-30-2006, 12:52	#10 (permalink)
..:MumbaiGsm:.. No Life Poster Join Date: Dec 2005 Posts: 790 Member: 205738 Status: Offline Thanks Meter: 129	OPEN circuit means you will not get continuity at positive & negative terminal.. its open means circuit not completing

10-30-2006, 12:54	#11 (permalink)
..:MumbaiGsm:.. No Life Poster Join Date: Dec 2005 Posts: 790 Member: 205738 Status: Offline Thanks Meter: 129	Check voltage at on/off switch ---it should be @3.0~3.5v if not then check track from power ic to on/off switch with the help of diagrams,schematics,Pictures... ok next

10-30-2006, 12:55	#12 (permalink)
..:MumbaiGsm:.. No Life Poster Join Date: Dec 2005 Posts: 790 Member: 205738 Status: Offline Thanks Meter: 129	Every hand set has FLASH Voltage which comes by pressing ON/OFF switch... It should be more than 2.5v so now you have to find the exact point where it comes........ so its also possible by diagrams,schematics,Pictures... check attachment for how to check flash voltage???????? wbr... ..::MumbaiGsm::..

10-30-2006, 14:23	#14 (permalink)
zahoor Insane Poster Join Date: Jul 2004 Location: lahore+bradford Posts: 70 Member: 74239 Status: Offline Thanks Meter: 0	thanx man i m understanding. its very usfull information. keep it up.

10-30-2006, 14:31	#15 (permalink)
zahoor Insane Poster Join Date: Jul 2004 Location: lahore+bradford Posts: 70 Member: 74239 Status: Offline Thanks Meter: 0	can u explain sir about my this confiusion. when i need to chek any dead pcb voltage then what i need to do. 4 exampel i need to attatch battry to pcd or just give it voltage with any voltage addaptor 3.7 volt.if have a simpel multi voltage addaptor then is i need to just output 3.7 volt to pcb or need to calculate ampeirs aswell. b coz deferent addaptor or dc voltage suplaire gives deferent ampeires with dc volt. i thing u will understand that what i want to say u. thanx and sory 4 bad english.