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Go Back   GSM-Forum > GSM & CDMA Phones Hardware Repair Area > Hardware Equipments for GSM

Hardware Equipments for GSM All about Hardware Instruments and equipments like Soldering Stations, Hardware Tools, Oscilloscopes , Frequency Counters ..ext.

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Old 11-27-2011, 12:20   #76 (permalink)
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WHEN WE INDRTAND HOW ONE COMPONENT WORK IT.S EASY TO CECH HIM.FOR EXEMPLE RISESTOR OR BOBINE.ACCORDING OF OHM V=R*I AND R=V/I .BUT IN BOBINE IMPEDANCE IS Lw*I WHERE w=2P*f (p=3.14 and f =frequency) to know more of all componant give you abilite to resolve problems.
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Old 12-03-2011, 17:55   #77 (permalink)
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hello with much glad to u.

pls i may need an asistment from u , if only u care i;m a jonior member i'm in great distress pls i need u to help me out, pls y. i'll be glad to meet u on line pls . when was that? this my email,,,,,[email protected] i' l apreciate ur understanding and ur little time . to meet u .pls accept my invitation .
my regards to all gssforum members and
administrators ''
thanksssss
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Old 01-06-2012, 17:01   #78 (permalink)
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Quote:
Originally Posted by leonard devinci View Post
Mobile phone Camponement ( Resistor , Condasator , Diode ) must be desolder before Measured , or it can to be measured even it's solder on board ?
if componenets have other in parallel they measured by removing one of them
if they have' nt you can test them on board

if they are in parallel with IC do not put the positive probe in the ground, when measuring for example resistors

you need also to remove components when you need to check for shortin in the PCB , for example remove coil that are in serie with IC's to know if it cause the shorting

Last edited by AhmedHosting; 01-06-2012 at 17:09.
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Old 09-04-2012, 08:06   #79 (permalink)
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Hi all
i am using this (positive probe on ground) method since 2004. And i repair thousands of sets by this method. I have made own theory about it but my problem is i dont know english very well so i am unable to translate my theory for you guys.
If any indian people need this theory in hindi language can contact me on 09907432714
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Old 09-15-2012, 13:01   #80 (permalink)
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Thumbs up

I wanted to say thanks for the info, I'm a self starter and I love doing this type of work. Started as a hobby and I'm trying to make it full time. Not sure how to do the thanks box.
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Old 11-27-2012, 20:05   #81 (permalink)
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Quote:
Originally Posted by manishavar15 View Post
Hi all
i am using this (positive probe on ground) method since 2004. And i repair thousands of sets by this method. I have made own theory about it but my problem is i dont know english very well so i am unable to translate my theory for you guys.
If any indian people need this theory in hindi language can contact me on 09907432714
Can you post your theory or give download link please?We can translate it with translater software, Thanks in advance!!
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Old 11-27-2012, 20:09   #82 (permalink)
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Quote:
Originally Posted by diehard View Post
Yashtel, you are right about this. But usually it's better to use diode measuring function on multimeter, because you test ESD protection diodes inside some IC. This way it's possible to check many IC input/output connecion. data or address bus.. But still osciloscope is essential equipment.
With diode test you will not get reading in case of high forward voltage diodes so using ohm meter is better
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Old 01-08-2015, 11:00   #83 (permalink)
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"When We Change The Keypad Ic Either It Is Correctly Fitted Or Not I Have To Check By Putting The Lcd Back Body And Battery And On The Set With Sim Check The Keypad And Joy Stick."

Kindly elaborate with possible image or manual diagram for more clarity ?

Awaiting for your good job ?

Thanks,

BR,

amit123
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Old 03-17-2019, 10:55   #84 (permalink)
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this information is usefull for all friends thank brother
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