GSM-Forum - Iphone hardware and software solutions in 24 hrs

other prbolem:

iPhone 4: All sounds are very loud biased (sounds like too high gain). when i reduce volume becomes better, but still biased. when i connect earphone, the same there. when i try to make a call, the mic makes a backcoupling and i hear only a loud beeeeeeeeeeeep. in the earphone also the same!

it was an water damage. i removed the metal shield around the NAND-Flash for cleaning. before i had no backligt, sound was ok i think, i can't say! which ic should i try to reball first??

what can that be? if somebody can help me, you get my greatest respect!!!

Try other mic if same possible some capacitors om mic ways are oxidized.
If audio codec ic is glued you don't have to reball it.

Quote:

Originally Posted by kostelectronics (Post 7854690)

It was an water damage.

And why you say that it was?:confused:

kostelectronics

11-02-2011 18:46

@wites:

i tryed this Board in a complete other case, same problem. what you mean with "And why you say that it was?" ...it's still a water damage!

Wites OM Tesla

11-02-2011 21:33

Quote:

Originally Posted by kostelectronics (Post 7855198)

@wites:

i tryed this Board in a complete other case, same problem. what you mean with "And why you say that it was?" ...it's still a water damage!

You said "it was an water damaged" it is like in past.
Try without mic connected & tell if same.

kostelectronics

11-02-2011 23:46

i disconnected the dock-flex and i have the same over the earphone! looks like the speaker is shorted with the mic....

Wites OM Tesla

11-03-2011 10:08

Quote:

Originally Posted by kostelectronics (Post 7855652)

i disconnected the dock-flex and i have the same over the earphone! looks like the speaker is shorted with the mic....

Can you precise where you hear that beeep in speaker or earspeaker?

kostelectronics

11-03-2011 10:25

in both. because this i think there are a short on the speaker / mic ways....

Wites OM Tesla

11-03-2011 10:35

Quote:

Originally Posted by kostelectronics (Post 7857061)

in both. because this i think there are a short on the speaker / mic ways....

Check for oxidized caps varistor's near dock connector & U5.
http://img217.imageshack.us/img217/6...4usbdriver.jpg
By wites13 at 2011-11-03
Remove 2 varistors near U5.

guruduttgarg

11-03-2011 13:41

i phone 3gs not charging solution send me sir plz

Wites OM Tesla

11-03-2011 14:16

Quote:

Originally Posted by guruduttgarg (Post 7857728)

i phone 3gs not charging solution send me sir plz

Here link go here http://forum.gsmhosting.com/vbb/f631...ml#post7754262
Second not charging solution coming soon.

bugis083

11-11-2011 02:44

iPhone 3g can't connect to pc but power up to restore mode

Hi everyone, I bought iPhone which were stuck on recovery mode, it was just listed by the seller on the ebay auction, for the cheap price, so I bought it with the hope it need just JB.
When i realized that it is not the usb dock not the usb wire, nor not the software issue, I went to open it up to see what's going from inside. By the way, iPhone 3g when connected to usb, shows Recovery mode screen, that's all.
So near the usb dock 4" connector I saw three missing resistors...
Is there a chance to make some jumper, or something like, which throw me out of this sticky problem?
There are three close pictures how it looks

http://img510.imageshack.us/img510/1609/dsc00757t.jpg
http://img189.imageshack.us/img189/5619/dsc00758e.jpg
http://img337.imageshack.us/img337/7726/dsc00759a.jpg

any suggestions would be much appreciated, Thanks

habeshfreak

11-15-2011 22:02

I have iphone 4 on 4.3.1 today when i restarted it is stuck on activation screen when i connect to computer it asks for passcode and i can't give passcode b/c it is on activation
screen help pls

MeiTeS

11-16-2011 14:12

hi... i have iphone4 with water damage.. camera not work (not open) changed the camera.. fully cleaned.. still not open the camera.. this link not help me. give me solution please... thx

rosemary33

11-17-2011 04:49

Need some help please

I have been doing small repairs for a few months butt they have been easy problems batt,cabels,LCD,dig,pretty much easy ones. Now have 3G no power and have checked batt,connections to board and need to know were to check on board volts ohms so on to repair. Is there like a known list were to start to figure out problem.from what I've read on this site seems like u all know what's going on.it would be really help full and I'm really new on phones Internet but have done tv's for long time let me know if I can help thanks.

Wites OM Tesla

11-17-2011 12:00

Voltage checking.

Quote:

Originally Posted by rosemary33 (Post 7897253)

When you have dead phone power problem,you check voltages without LCD
power on phone and check this voltage http://forum.gsmhosting.com/vbb/f631...ml#post7851700
but be careful to not short something to GND.

pupilo

11-17-2011 12:18

I have an iphone 4 after falling not called someone can help me more

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