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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > iPhone ,iPod & iPad (Apple Inc. Products) > iPhone, iPad, iPod Hardware Repair

iPhone, iPad, iPod Hardware Repair Hardware Repair discussions for iPhone, iPod , iPad & Apple Products, help, guides.

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Old 12-20-2011, 13:55   #2356 (permalink)
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Quote:
Originally Posted by poitelodico View Post
The phone hasn't water signs... may be is dropped but it seems no missing and/or no cracked parts inside.
I'm using with original charger and original USB cable.
I don't know if the last owner connected it to a china charger. Sorry
Chk voltages with battery charged after you press power on without lcd be careful to not short some coil to gnd.

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Old 12-20-2011, 14:59   #2357 (permalink)
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Quote:
Originally Posted by Wites View Post
Chk voltages with battery charged after you press power on without lcd be careful to not short some coil to gnd.
Just 2 (silly) questions:

1) How can I know if the battery is charged (or is charging) if I can't switch on the device and without any life sign?

2) How can I remove/desolder the metal frame from the PCB (I already removed the shield plates) without damages? any suggestions?
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Old 12-20-2011, 15:04   #2358 (permalink)
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Quote:
Originally Posted by poitelodico View Post
Just 2 (silly) questions:

1) How can I know if the battery is charged (or is charging) if I can't switch on the device and without any life sign?

2) How can I remove/desolder the metal frame from the PCB (I already removed the shield plates) without damages? any suggestions?
Answers:
1) Check battery with multimeter see if it's got around 3.9V
2) desolder them using a solder iron
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Old 12-20-2011, 15:27   #2359 (permalink)
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Quote:
Originally Posted by poitelodico View Post
Just 2 (silly) questions:

1) How can I know if the battery is charged (or is charging) if I can't switch on the device and without any life sign?

2) How can I remove/desolder the metal frame from the PCB (I already removed the shield plates) without damages? any suggestions?
Chk with multimeter if battery charged.

You don't need to remove metallic frames.
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Old 12-20-2011, 16:02   #2360 (permalink)
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Originally Posted by Wites View Post
You don't need to remove metallic frames.
I can't reach all test points if frames are present...
don't you think so?
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Old 12-20-2011, 16:47   #2361 (permalink)
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Quote:
Originally Posted by poitelodico View Post
I can't reach all test points if frames are present...
don't you think so?
Ok then remove them be careful.
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Old 12-20-2011, 18:59   #2362 (permalink)
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Quote:
Originally Posted by Wites View Post
This is right.

By wites13 at 2011-12-20
Exactly these point checked and show continuity. So no problem here.

Pressed NVRam and took photo but still restarts.
Replaced with a good known battery and still restarts.

Restoring to custom firmware 3.1.3 at the moment where the apple power management was older. I will report later
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Old 12-20-2011, 20:47   #2363 (permalink)
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Check this line if good.

By wites13 at 2011-10-27
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Old 12-20-2011, 22:14   #2364 (permalink)
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Quote:
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Check this line if good.

By wites13 at 2011-10-27
Is that the Battery SWI line? (after checking the schema)
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Old 12-20-2011, 23:19   #2365 (permalink)
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Quote:
Originally Posted by Wites View Post
Chk voltages with battery charged after you press power on without lcd be careful to not short some coil to gnd.
I did the battery check and seems to be full charged (about 3.7 V).
I pressed power on and checked voltages (without lcd):
Vddsd1 = Vddsd2 = Vddsd3 = 0.7 V
but I must admit a trouble...
At first they where all at about 3.7 V but one of the probe, while I was doing the Vddsd1 measuring, has moved and touched the small part at the top of Vddsd1 (a glued condenser?) and all voltages fell to 0.7
The space is minimal and it's easy to move in a close part without any needs (I haven't removed the metal frame...)
What can I do now?
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Old 12-20-2011, 23:39   #2366 (permalink)
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Quote:
Originally Posted by poitelodico View Post
I did the battery check and seems to be full charged (about 3.7 V).
I pressed power on and checked voltages (without lcd):
Vddsd1 = Vddsd2 = Vddsd3 = 0.7 V
but I must admit a trouble...
At first they where all at about 3.7 V but one of the probe, while I was doing the Vddsd1 measuring, has moved and touched the small part at the top of Vddsd1 (a glued condenser?) and all voltages fell to 0.7
The space is minimal and it's easy to move in a close part without any needs (I haven't removed the metal frame...)
What can I do now?
Oh bro this not good you short some component check with battery if something not heating.
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Old 12-20-2011, 23:40   #2367 (permalink)
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Thumbs up To limespirit.

Yes that is battery SWI line check if not broke.
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Old 12-20-2011, 23:58   #2368 (permalink)
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Quote:
Originally Posted by Wites View Post
Oh bro this not good you short some component check with battery if something not heating.
Nothing heating...
I checked by your method (lips)
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Old 12-21-2011, 00:01   #2369 (permalink)
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Quote:
Originally Posted by poitelodico View Post
Nothing heating...
I checked by your method (lips)
Ok check green fuse for beep shorting with multimeter,if not beep that mean it burn inside you will need to jump it with wire.
To locate fuse look in upper photos.
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Old 12-21-2011, 00:06   #2370 (permalink)
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Quote:
Originally Posted by Wites View Post
Ok check green fuse for beep shorting with multimeter,if not beep that mean it burn inside you will need to jump it with wire.
To locate fuse look in upper photos.
if you mean the batt fuse near the vibra motor, it beeps then I think is still good.
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