Revamped version of the iPhone 3G with faster processing speeds. Repair of this device is similar to the 3G, and requires simple screwdrivers and prying tools. Model A1303 / 16 or 32 GB capacity / black or white plastic back.

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Power Manager 338S0768 (iPhone 3GS) is warmed!

NXP Power Management IC Chip is greatly warmed. I changed it to a new one, but nothing has changed.

What else can make it warm?

What is the maximum temperature of the withstand this chip? I am afraid that I was overheat it.

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Do you change the ic? How do you this?

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I used hot air (soldering equipment Lukey-702).

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Tth(die).......... die threshold temperature is 125c

Tamb ........... ambient temperature is min -40c max +85c

Tstg ............... storage temperature is min -55c max +150c

check the Apllication information for the PCF50633 this is the correct name of philips NXP PMIC

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The NXP IC is used in the 3G, not the 3GS. The 3GS uses D1755 (338S0768), a chip made by Analog Semiconductor, and having pins marked upto 77 in the schematic, whereas PCF50663 has 68 pins. Probably a custom IC made just for Apple. As production is low, and demand high due to the high failure rate, it's an expensive IC for what it does.

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You replaced the logic board? if this didn't fix it, you might have a bad battery, or a bad dock connector.

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Hi,

do you have a short circuit at the outputs? check the resistance to GND of the 3 coils and post result. i think i can help you

spam removed

BR Matthias

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Guys, i just follow someone's idea to use a flashlight to get to settings, and managed to turn Auto Brightness OFF and slide the bar to the lowest point. Turned the iphone off and the on and Voilaaa! I can see what im doing with a very low light but operational at least. But the minute you crank up the slider to make it brighter it will go back to black. So, maybe with these symptoms an expert can tell me if this smells like coil, IC or what?! thanks!

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