Author Topic: Xbox One X: caps values around the 3.3V test point?  (Read 1694 times)

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Offline SlykenTopic starter

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Xbox One X: caps values around the 3.3V test point?
« on: February 15, 2021, 06:20:12 pm »
Hello, I'm trying to repair an Xbox One X that doesn't power at all.
I found the TP10 "V_3P3STBY" is shorted to ground, the 5V test point close to it does show 5V.

Here is a picture, please ignore how the caps look on the left, I tried to remove them with my hot air station and some flux:
1174722-0
Does someone know the values of C267, C268, C274, C275, C284, C285, C289, C290, C299, C300 (I guess they are all the same) and C303 (the small one)?

The caps on the left and right of the 56C215 chip are not shorted, and there is nothing on the other side, I hope it's one of them :)
 

Offline fzabkar

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Re: Xbox One X: caps values around the 3.3V test point?
« Reply #1 on: February 15, 2021, 08:52:57 pm »
TI's datasheet recommends that the min/max values for Cout at 3.3V should be 88uF/500uF, respectively. For 10 caps, that's 8.8/50uF per cap.

https://www.ti.com/lit/gpn/tps56c215
 

Offline perieanuo

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Re: Xbox One X: caps values around the 3.3V test point?
« Reply #2 on: February 16, 2021, 07:39:26 am »
i quote myself from nother post:
short on complex and relatively cheap pcb's cab be succesfuly diagnosed aplying the correct voltage from some variable power supply setting some current limit (like in your case i'll use 12V and minimum 2A), then your 'suspect' heats up
that method is tested in finding shorted capacitors in laptop motherboards, you find the broken one in seconds, can't beat this method (in some laptop mobo I used 10-20 amps to burn the capacitor, seems like a joke but works)
look for some recent radio repair job here on this forum, i proposed this and some joker laught, but finally the OP used the method and found a broken transformer in 2 minutes. the thing, you can't broke what's already broken, and with this aproach you don't make more damage, maybe burn a track bu that's easy to fix afterwards
OR you can take out piece by piece, the visual check often fails short, after 2 hours :)
 


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