Training manuals for beginners - GSM-Forum

lucascape · 03-17-2006, 14:49

Hi
Anyone who can help me to compose a training manual for cellphone technician, please email me: [email protected]

I want to show or tell, how to test for faulths, where to start, etc?

How to test the caps, resistors, diodes on the pcd boards?

How to know which chips to remove or to replace and why?

Any help, please!!!!!!!!!!

lucascape · 03-18-2006, 09:55

I have a manual allready type out, but I need extra info on testing??

How to test the parts and why?
How to replace them and why?

Any help, I can e-mail the manual to you, just email me with help and you email adress.

regards
Lucas

artusius · 03-19-2006, 18:09

Hi all,
How test the parts?
At first you may learn read schematic diagrams.
Parts in phones are similar with radio,tv or other device,maybe smaller.If you know how work diod,capacitor,resistor,transistor,etc., then you can test
parts in mobile.
Finding faults comes with expirience

Read forums,ask and learn.Is the best way for study

..::My3gtech::.. · 03-19-2006, 18:19

Hi guy's this is a good move for beginners we appriciating your move well done and keep it up my best regard's for you my friend's.

BR
Omairbutt786

shirly · 03-19-2006, 21:57

dear friends tell me more about u.Are u from a electeronocs background. there are two suggestions from me.u shuold join a institute for basic electronics. or send me any manual to me with problem I will try to solve and will send to u.write here yor quostions and I will try to solve.and time to time I will send attech files releted to subject.for today DIODS TEST : a doide shows a one way deflection when we test it on a multitester on continuety range. a capacitor dont show any deflection in lowest continuety range(exept electrolytic cap.)and a resister shows its value, but in pcb it dont show acurate value therefore no need to check resister in pcb. u can also masure voltage on lower DC range.Is this suiteble for u? tell me then I willproceed.
GOOD LUCK.

sahilsahil · 03-22-2006, 14:09

sir i m sahil i wnt to know how to repair mobiles i want to know when cutomer
tell us that i have problem with my cell like samsung c100 with please wait and restart problem wat should i check where is the problem
i dont know which part of the cell is defected thats it

parvezjk · 03-24-2006, 15:31

Quote:

Originally Posted by sahilsahil

sir i m sahil i wnt to know how to repair mobiles i want to know when cutomer
tell us that i have problem with my cell like samsung c100 with please wait and restart problem wat should i check where is the problem
i dont know which part of the cell is defected thats it

Hi Shahil,
I suggest you should join a institute for basic electronics. To earn mony first you have to invest. With your learning together u can use this forum. Then u will understand all the answers of our great healpers. So please do study. In India we say " BINA GURU GNAN NAHI".

lucascape · 03-30-2006, 12:34

If you want mail supply the right email addy or email me?

shirly · 03-30-2006, 20:06

Quote:

Originally Posted by lucascape

Thanks for the info, Thats what i need.
I have done electronics 8 years ago, back on the mind somewhere?

Can you maybe email me as I am n ot always on the forum and could ask and respond faster with email?

My email: [email protected]

Regards
Lucas

Dear friend it will be more good to put answer and quostions here so that all intrested members can read.also many more subjects and rilated refrenses are here for u.but if u are not always on forum u can mail me I will try to answer .
best wishes:shirly.

lucascape · 03-31-2006, 08:28

Okay

Which equiptment should one have:
Hot airstation, Soldering station, Unlocking boxes, tools, etc?

HOw to know which parts to repalce and when and why?

How to test the PA and know if to replace it?
How to test the antanna switch and know when to replace it?
How to test, Mic, Speaker, ringer and vibrator?
How to test the Hagar, CCont, Cobba, UEM, CPU, Flash, etc and know when to change them?

How to know when software and when Hardware?

regards
Lucas
Can you post answers here and also email them to me, please?

lucascape · 03-31-2006, 14:08

Which equippment should one have:
beginners: Hot airstaion, ultrasonic bath, Soldering station, unlocking boxes
advanced: Spectrum analyzer, ocilloscope, rf generators

What else and why do they need it?

lucascape · 03-31-2006, 14:20

How to know which parts to replace and why and how?

Signal = No signal, weak signal, jumping signal, 10 sec dop signal
Dead = Not switching on, not battery
Liquid damage = where to begin
Software = when to know when it's software and how to go about it
Speaker, ringer, vibrator, mic = How to test it
Simcard = How to test?
keypads = How to solve problems

spring · 03-31-2006, 14:32

hi guys please add not able to call even when phone is registered & with high signal it just dials up & get cut.

lucascape · 03-31-2006, 14:42

CELL PHONE BATTERIES - NOTE CAREFULLY

It should be noted that all cell phone batteries have a LIMITED LIFESPAN.
Batteries will only accept approximately 200 RECHARGE CYCLES before becoming problematic. (This means that the average battery which is charged fully twice per week in theory will have a lifespan of between 18 months and 24 months.)
TAKE NOTE: Batteries which are continually charged using a "Car Charger" are prone to early failure. This is due to the fact that a car charger is designed as a "BOOSTER" and does not deliver the full required charged as specified by the manufacturer. NiCad (Nickel Cadium) Batteries are prone to building up a "MEMORY EFFECT" due to the battery being habitually recharged without it being fully discharged. This shortens the battery life substantially. Lithium Ion and Lithium polymer Batteries are not affected by this syndrome.

Feel free to add anything else

lucascape · 03-31-2006, 15:25

© Celtrain 2003
Copyright

Before commencing with any repair procedure always DIAGNOSIS Action to be taken
test the phone to verify the customers complaint.
CHECK THE PHONE FOR ANY VISIBLE PHYSICAL DAMAGE

Antennae Physical Damage Replace

Internal Damage - Phone Dropped / Mositure/ Water Physical Damage Check Components & Replace as required
Water/Moisture Damage Clean & Reflow Board

Antennae Connector Physical Damage Check - Lift Connector pin to make contact/ Repalce

Antennae Switch Dry Joint/Physical Damage Reflow Dry Joint / Replace if Damaged

Power Amplifier Dry Joint/Physical Damage Reflow Dry Joint / Replace if Damaged

DSP / HAGAR Dry Joint Reflow Dry Joint / Replace if Damaged

CPU Dry Joint Reflow Dry Joint

Antennae Physical Damage Replace

Antennae Switch Physical Damage Replace

Power Amplifier Physical Damage Replace

DSP / HAGAR Physical Damage Replace

Software Software Failure Software upgrade / Flashing

03-17-2006, 14:49	#1 (permalink)
lucascape Insane Poster Join Date: Aug 2005 Location: Capetown, South Africa Age: 47 Posts: 97 Member: 169052 Status: Offline Thanks Meter: 121	Training manuals for beginners Hi Anyone who can help me to compose a training manual for cellphone technician, please email me: [email protected] I want to show or tell, how to test for faulths, where to start, etc? How to test the caps, resistors, diodes on the pcd boards? How to know which chips to remove or to replace and why? Any help, please!!!!!!!!!!

03-18-2006, 09:55	#2 (permalink)
lucascape Insane Poster Join Date: Aug 2005 Location: Capetown, South Africa Age: 47 Posts: 97 Member: 169052 Status: Offline Thanks Meter: 121	Traing Manuals I have a manual allready type out, but I need extra info on testing?? How to test the parts and why? How to replace them and why? Any help, I can e-mail the manual to you, just email me with help and you email adress. regards Lucas

03-30-2006, 12:34	#8 (permalink)
lucascape Insane Poster Join Date: Aug 2005 Location: Capetown, South Africa Age: 47 Posts: 97 Member: 169052 Status: Offline Thanks Meter: 121	Training Manuals If you want mail supply the right email addy or email me?

03-31-2006, 08:28	#10 (permalink)
lucascape Insane Poster Join Date: Aug 2005 Location: Capetown, South Africa Age: 47 Posts: 97 Member: 169052 Status: Offline Thanks Meter: 121	Hi shIrly Okay Which equiptment should one have: Hot airstation, Soldering station, Unlocking boxes, tools, etc? HOw to know which parts to repalce and when and why? How to test the PA and know if to replace it? How to test the antanna switch and know when to replace it? How to test, Mic, Speaker, ringer and vibrator? How to test the Hagar, CCont, Cobba, UEM, CPU, Flash, etc and know when to change them? How to know when software and when Hardware? regards Lucas Can you post answers here and also email them to me, please?

03-31-2006, 14:08	#11 (permalink)
lucascape Insane Poster Join Date: Aug 2005 Location: Capetown, South Africa Age: 47 Posts: 97 Member: 169052 Status: Offline Thanks Meter: 121	question one? Which equippment should one have: beginners: Hot airstaion, ultrasonic bath, Soldering station, unlocking boxes advanced: Spectrum analyzer, ocilloscope, rf generators What else and why do they need it?

03-19-2006, 18:09	#3 (permalink)
artusius Freak Poster Join Date: Sep 2004 Location: United Kingdom Age: 51 Posts: 263 Member: 82796 Status: Offline Thanks Meter: 21	Hi all, How test the parts? At first you may learn read schematic diagrams. Parts in phones are similar with radio,tv or other device,maybe smaller.If you know how work diod,capacitor,resistor,transistor,etc., then you can test parts in mobile. Finding faults comes with expirience Read forums,ask and learn.Is the best way for study

03-19-2006, 18:19	#4 (permalink)
..::My3gtech::.. No Life Poster Join Date: Jul 2005 Location: Mobile solution at Pak_Lahore Age: 46 Posts: 979 Member: 158032 Status: Offline Thanks Meter: 331	Hi guy's this is a good move for beginners we appriciating your move well done and keep it up my best regard's for you my friend's. BR Omairbutt786

03-19-2006, 21:57	#5 (permalink)
shirly Insane Poster Join Date: Feb 2006 Posts: 80 Member: 234532 Status: Offline Thanks Meter: 25	dear friends tell me more about u.Are u from a electeronocs background. there are two suggestions from me.u shuold join a institute for basic electronics. or send me any manual to me with problem I will try to solve and will send to u.write here yor quostions and I will try to solve.and time to time I will send attech files releted to subject.for today DIODS TEST : a doide shows a one way deflection when we test it on a multitester on continuety range. a capacitor dont show any deflection in lowest continuety range(exept electrolytic cap.)and a resister shows its value, but in pcb it dont show acurate value therefore no need to check resister in pcb. u can also masure voltage on lower DC range.Is this suiteble for u? tell me then I willproceed. GOOD LUCK.

03-22-2006, 14:09	#6 (permalink)
sahilsahil Registered User Join Date: Mar 2006 Location: INDIA (PUNJAB) Posts: 78 Member: 243866 Status: Offline Thanks Meter: 10	sir i m sahil i wnt to know how to repair mobiles i want to know when cutomer tell us that i have problem with my cell like samsung c100 with please wait and restart problem wat should i check where is the problem i dont know which part of the cell is defected thats it

03-31-2006, 14:20	#12 (permalink)
lucascape Insane Poster Join Date: Aug 2005 Location: Capetown, South Africa Age: 47 Posts: 97 Member: 169052 Status: Offline Thanks Meter: 121	Question Two? How to know which parts to replace and why and how? Signal = No signal, weak signal, jumping signal, 10 sec dop signal Dead = Not switching on, not battery Liquid damage = where to begin Software = when to know when it's software and how to go about it Speaker, ringer, vibrator, mic = How to test it Simcard = How to test? keypads = How to solve problems

03-31-2006, 14:32	#13 (permalink)
spring Insane Poster Join Date: Jan 2006 Posts: 83 Member: 225922 Status: Offline Thanks Meter: 3	not able to call hi guys please add not able to call even when phone is registered & with high signal it just dials up & get cut.

03-31-2006, 14:42	#14 (permalink)
lucascape Insane Poster Join Date: Aug 2005 Location: Capetown, South Africa Age: 47 Posts: 97 Member: 169052 Status: Offline Thanks Meter: 121	Battries CELL PHONE BATTERIES - NOTE CAREFULLY It should be noted that all cell phone batteries have a LIMITED LIFESPAN. Batteries will only accept approximately 200 RECHARGE CYCLES before becoming problematic. (This means that the average battery which is charged fully twice per week in theory will have a lifespan of between 18 months and 24 months.) TAKE NOTE: Batteries which are continually charged using a "Car Charger" are prone to early failure. This is due to the fact that a car charger is designed as a "BOOSTER" and does not deliver the full required charged as specified by the manufacturer. NiCad (Nickel Cadium) Batteries are prone to building up a "MEMORY EFFECT" due to the battery being habitually recharged without it being fully discharged. This shortens the battery life substantially. Lithium Ion and Lithium polymer Batteries are not affected by this syndrome. Feel free to add anything else

03-31-2006, 15:25	#15 (permalink)
lucascape Insane Poster Join Date: Aug 2005 Location: Capetown, South Africa Age: 47 Posts: 97 Member: 169052 Status: Offline Thanks Meter: 121	Phone no signal © Celtrain 2003 Copyright Before commencing with any repair procedure always DIAGNOSIS Action to be taken test the phone to verify the customers complaint. CHECK THE PHONE FOR ANY VISIBLE PHYSICAL DAMAGE Antennae Physical Damage Replace Internal Damage - Phone Dropped / Mositure/ Water Physical Damage Check Components & Replace as required Water/Moisture Damage Clean & Reflow Board Antennae Connector Physical Damage Check - Lift Connector pin to make contact/ Repalce Antennae Switch Dry Joint/Physical Damage Reflow Dry Joint / Replace if Damaged Power Amplifier Dry Joint/Physical Damage Reflow Dry Joint / Replace if Damaged DSP / HAGAR Dry Joint Reflow Dry Joint / Replace if Damaged CPU Dry Joint Reflow Dry Joint Antennae Physical Damage Replace Antennae Switch Physical Damage Replace Power Amplifier Physical Damage Replace DSP / HAGAR Physical Damage Replace Software Software Failure Software upgrade / Flashing

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