Is oscilloscope worth using ? - GSM-Forum

bbbbbb · 01-03-2004, 21:01

I bought oscilloscope to help me in repairing. I read Nokia service manuals( repaire hints) for Nokia 3310. I was looking forward to using oscilloscope hoping I will get more or less the same results as Nokia manual says for good/bad phones.For example I should measure signals on SIM card pad but I can not get them. Must I use Wintesla first to set up a mobile to a measuring state?
Or what must I do to get the similar results as Nokia manual says? Thanks for help.

Engineer · 01-04-2004, 21:47

you need a 3310 panel jig, for testing sim signals, (very pricey jig).
as for oscilloscopes, you can check the clocks on all phones, 26Mhz and 32Khz, sim signals and much more.

bbbbbb · 01-05-2004, 09:53

I have jig, but I can not get the same results as I should according service manuals. Did you get the same reults( pictures on oscilloscope) as the service manual says? Or just only "similar"?

Engineer · 01-05-2004, 13:44

have you put correct voltage into jig?

bbbbbb · 01-05-2004, 15:09

Yes, I use the correct voltage because the phone works but I can not get the pictures as the service manual says

Engineer · 01-06-2004, 00:04

the test points for the 3310 sim pads, are actually in the outside of the jig, shld be 6 gold plated pads...
also may need sim card inserted
thanks

Luciano · 01-06-2004, 08:50

Yes, it is true, the signals are not 100% identical like in the picture... because you don't have that nice, expensive tools they used for that manual.

better take an good working phone and check the signals and then compare with the faulty phones, to have an idea how good signal it's look.

And yes, you have to use Serv SW to set phone in Local or Test mode and to perform specific operation and then to check with Osciloscope acording to serv manual.

01-03-2004, 21:01	#1 (permalink)
bbbbbb Freak Poster Join Date: Aug 2003 Posts: 152 Member: 37416 Status: Offline Thanks Meter: 1	Is oscilloscope worth using ? I bought oscilloscope to help me in repairing. I read Nokia service manuals( repaire hints) for Nokia 3310. I was looking forward to using oscilloscope hoping I will get more or less the same results as Nokia manual says for good/bad phones.For example I should measure signals on SIM card pad but I can not get them. Must I use Wintesla first to set up a mobile to a measuring state? Or what must I do to get the similar results as Nokia manual says? Thanks for help.

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01-04-2004, 21:47	#2 (permalink)
Engineer Freak Poster Join Date: Nov 2003 Posts: 325 Member: 44658 Status: Offline Thanks Meter: 0	you need a 3310 panel jig, for testing sim signals, (very pricey jig). as for oscilloscopes, you can check the clocks on all phones, 26Mhz and 32Khz, sim signals and much more.

01-05-2004, 09:53	#3 (permalink)
bbbbbb Freak Poster Join Date: Aug 2003 Posts: 152 Member: 37416 Status: Offline Thanks Meter: 1	I have jig, but I can not get the same results as I should according service manuals. Did you get the same reults( pictures on oscilloscope) as the service manual says? Or just only "similar"?

01-05-2004, 13:44	#4 (permalink)
Engineer Freak Poster Join Date: Nov 2003 Posts: 325 Member: 44658 Status: Offline Thanks Meter: 0	have you put correct voltage into jig?

01-05-2004, 15:09	#5 (permalink)
bbbbbb Freak Poster Join Date: Aug 2003 Posts: 152 Member: 37416 Status: Offline Thanks Meter: 1	Yes, I use the correct voltage because the phone works but I can not get the pictures as the service manual says

01-06-2004, 00:04	#6 (permalink)
Engineer Freak Poster Join Date: Nov 2003 Posts: 325 Member: 44658 Status: Offline Thanks Meter: 0	the test points for the 3310 sim pads, are actually in the outside of the jig, shld be 6 gold plated pads... also may need sim card inserted thanks

01-06-2004, 08:50	#7 (permalink)
Luciano Freak Poster Join Date: Aug 2001 Location: RO Posts: 479 Member: 5992 Status: Offline Thanks Meter: 1	Yes, it is true, the signals are not 100% identical like in the picture... because you don't have that nice, expensive tools they used for that manual. better take an good working phone and check the signals and then compare with the faulty phones, to have an idea how good signal it's look. And yes, you have to use Serv SW to set phone in Local or Test mode and to perform specific operation and then to check with Osciloscope acording to serv manual.