4s auto power on - Page 2 - GSM-Forum

X10robin · 10-30-2012, 13:18

found it !!

After a good cleaning yesterday it looks good on the camera.
reassembly time

ps3xbox · 10-31-2012, 00:43

Quote:

Originally Posted by Wites OM Tesla

Just find power on line near connector and short to GND there is a varistor i short it with tweezers to power on.

this is not a varistor? DZ11 is bidirectional zener diode..very different from varistor

Wites OM Tesla · 10-31-2012, 01:06

Quote:

Originally Posted by ps3xbox

this is not a varistor? DZ11 is bidirectional zener diode..very different from varistor

For you is what you say for me is varistor i remove them like i did in old samsung phones.

And i want to tell you more i meet allot of masters that know all this things about components and they buy allot of tools that are no use they can't solve small faults,i not know this what you say and i not need allot of tools to fix any hardware fault.

X10robin · 10-31-2012, 08:49

phone works.

2 issues left.

Wifi only connects when very close to the hot-spot.
battery drains very fast.

over night in standby mode from 85% down to 24%.
Battery suffert waterdamage as well.
So a new battery will might be needed.

Is a 4S battery the same as a 4 ??
(except for the metal piece on the connector)

in other words can i solder the metal piece from the 4S battery on a 4 battery and test ??

simonchunk · 10-31-2012, 09:21

No, 4s battery is different. Always change battery after water damage.

air_chair256 · 11-01-2012, 05:23

about wifi problem check the wifi antenna iphone4swifibtsignalway.jpg

X10robin · 11-01-2012, 11:10

all component in the wifi area are present and look clean.

Of course i can jumper the coil and the filter to have a bit more signal strength. But if they are not damaged this is not the root cause of the problem !

air_chair256 · 11-01-2012, 17:24

you can check with multimeter if the coil is good or damaged if i have your problem i will change the gold antenna J2_RF and change wifi antenna
iphone-4-4s-wifi-antenna-connector-port-2.jpg
ip4wifi.jpg
iphone-4s-bluetooth-antenna-fastening-piece.jpg

if you dont have this parts and you cant change it so you can clean the wifi antenna and resolder J2_RF also resolder or replace FL10_RF
your phone is water damaged i dont think wifi ic damaged so you must be sure from antenna ways

X10robin · 11-04-2012, 20:45

although the coil and filter seemed to be ok.
I have by-passed them.

Now the signal level is better but still not as good as it should be.
But it is acceptable.

New battery works OK

So repair is done.
On to the next challange

kiamtat · 11-21-2012, 05:58

Quote:

Originally Posted by MeiTeS

try this solution.... it help to me on 4s auto turn on.

u helped me! thanks alot!!!!!

Wites OM Tesla · 11-21-2012, 19:10

Quote:

Originally Posted by MeiTeS

try this solution.... it help to me on 4s auto turn on.

OMG

i just now see this picture you advice to jump an 220K resistor this is very bad

tolski · 01-19-2013, 10:53

Quote:

Originally Posted by X10robin

small update.

just placed a very smal piece of capton tape on pin 26 of the dock flex.
this "solved the auto power on issue.

But of course there is a bit more wrong due to water damage.
it states searching all the time.
now trying to fix that.

can u post where this pin26 located?

X10robin · 01-20-2013, 17:33

if you look on the complete schematics.
You can count the pins on the connnector.

It is de connector where the dock flex is connected on the main board.
In my case there was something wrong in the dock flex.
After replacing the dock flex the auto power on was solved.

omer.pozot · 10-23-2013, 12:35

Quote:

Originally Posted by MeiTeS

try this solution.... it help to me on 4s auto turn on.

help for me 2
after water damage
thanks!

click-z7 · 08-01-2014, 15:25

How about with iPhone 4 GSM (1332)?
Thanks!

11-01-2012, 17:24	#23 (permalink)
air_chair256 Freak Poster Join Date: Oct 2011 Posts: 338 Member: 1679608 Status: Offline Thanks Meter: 190	you can check with multimeter if the coil is good or damaged if i have your problem i will change the gold antenna J2_RF and change wifi antenna iphone-4-4s-wifi-antenna-connector-port-2.jpg ip4wifi.jpg iphone-4s-bluetooth-antenna-fastening-piece.jpg if you dont have this parts and you cant change it so you can clean the wifi antenna and resolder J2_RF also resolder or replace FL10_RF your phone is water damaged i dont think wifi ic damaged so you must be sure from antenna ways Last edited by air_chair256; 11-01-2012 at 17:33.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
6110 power does not stay on	sc~micro	Nokia Legacy Phones ( DCT-1 ,2 ,3 ,L )	6	08-30-2014 08:14
what prog changes imei on 6110 and how do i do it?	Ravetrancer	Nokia Legacy Phones ( DCT-1 ,2 ,3 ,L )	3	07-31-2012 20:09

10-30-2012, 13:18	#16 (permalink)
X10robin Freak Poster Join Date: May 2011 Location: Netherlands Posts: 172 Member: 1583294 Status: Offline Thanks Meter: 27	found it !! After a good cleaning yesterday it looks good on the camera. reassembly time

10-31-2012, 08:49	#19 (permalink)
X10robin Freak Poster Join Date: May 2011 Location: Netherlands Posts: 172 Member: 1583294 Status: Offline Thanks Meter: 27	phone works. 2 issues left. Wifi only connects when very close to the hot-spot. battery drains very fast. over night in standby mode from 85% down to 24%. Battery suffert waterdamage as well. So a new battery will might be needed. Is a 4S battery the same as a 4 ?? (except for the metal piece on the connector) in other words can i solder the metal piece from the 4S battery on a 4 battery and test ??

10-31-2012, 09:21	#20 (permalink)
simonchunk Freak Poster Join Date: Jul 2011 Posts: 239 Member: 1615254 Status: Offline Thanks Meter: 53	No, 4s battery is different. Always change battery after water damage.

11-01-2012, 05:23	#21 (permalink)
air_chair256 Freak Poster Join Date: Oct 2011 Posts: 338 Member: 1679608 Status: Offline Thanks Meter: 190	about wifi problem check the wifi antenna iphone4swifibtsignalway.jpg

11-01-2012, 11:10	#22 (permalink)
X10robin Freak Poster Join Date: May 2011 Location: Netherlands Posts: 172 Member: 1583294 Status: Offline Thanks Meter: 27	all component in the wifi area are present and look clean. Of course i can jumper the coil and the filter to have a bit more signal strength. But if they are not damaged this is not the root cause of the problem !

11-04-2012, 20:45	#24 (permalink)
X10robin Freak Poster Join Date: May 2011 Location: Netherlands Posts: 172 Member: 1583294 Status: Offline Thanks Meter: 27	although the coil and filter seemed to be ok. I have by-passed them. Now the signal level is better but still not as good as it should be. But it is acceptable. New battery works OK So repair is done. On to the next challange

01-20-2013, 17:33	#28 (permalink)
X10robin Freak Poster Join Date: May 2011 Location: Netherlands Posts: 172 Member: 1583294 Status: Offline Thanks Meter: 27	if you look on the complete schematics. You can count the pins on the connnector. It is de connector where the dock flex is connected on the main board. In my case there was something wrong in the dock flex. After replacing the dock flex the auto power on was solved.

08-01-2014, 15:25	#30 (permalink)
click-z7 Junior Member Join Date: Aug 2014 Posts: 3 Member: 2232486 Status: Offline Thanks Meter: 0	How about with iPhone 4 GSM (1332)? Thanks!