5210 mic problem
 

Please help me on this:

Mic sound from this unit is interupted, it is breaking up.
These are short breakings, and they are present only when other party is speaking.

Example:

While 5210 talking to other party, sound comming from 5210 is breaking up when other party talks. If other party is silent, everything is OK.

I have tried to change the mic, clean the contacts, reflow cobba. Nothing helps.

When i connect external headset, then everything is OK.

Can i bridge internal mic pads with contact to mic in external headset?

don`t do that man
1st check a small resestores arrowned a cobba
u have one of them is failure
good luck

PLEASE HELP ME!
 

Does anybody know exactlly what resistor could be the problem?
I don't have full service manual for this phone, and i checked everything i could, but i am without any idea now.

Does anybody have full service manual for 5210?

I HAVE 4 PHONES WITH THIS PROBLEM, PLEASE HELP ME....

Hi,
Cobba fault.
Reball, or Change it!!!!!!!!! or just use Hot air & flux!

Sorry (short reply), my english is no good.

If will no Good, E-mail me: [email protected]
Good luck!

I don't think it's COBBA
 

With headphones everything is OK!

I have allready tried to rehot with flux - no result.

Anyway, I'll try to reball or change COBBA today and I'll post here the results.

NO GOOD
 

I have changed COBBA - problem remains!

Please help!
It seems to be common problem with 5210!

Yeah...
I send for you e-mail with repair solution.
Tonight...

than:
check R287 (bottom) If shortcut, than remove.
Mic+ ---->R268 shortcut, R268 outside ---->C263 shortcut, C263 outside ---->Cobba mic2n (A3) Shortcut. Measure it with multimeter. if not contact, =>wire...
Good luck

E-mail not sent.

i have a headache :(
 

Al checked - All OK -> Problem remains.

I think the problem can be in headset or PPH-1 detection.
I fopund in service manual that there is a switch in system connector that is in charge of headset detection.

Maybe problem with bias / V250?

Any opinion?

i have service manual
 

I have allready checked everything on that page of service manual for 5 times at least.

I still can't get it to work....

I will check if vcobba is 2.8V, but i don't think the problem is in that, because mic works OK if there is no signal on speaker.
What is happening is some kind of cutting mic signal OFF when other party speaks.

@willy
good jop
can i know how can attech a pictures in this fourm?

Hey Brother's Your Problem Is 100% Soved Here. Just Check it Out.
Nokia 5210 Mic Microphone Ways
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Hey Brother's Your Problem Is 100% Soved Here. Just Check it Out.
Nokia 5210 Mic Microphone Ways
Mobile Repairing Picture Help