Xbox 360 - Falcon error E75 after E76 repair

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Xbox 360 - Falcon error E75 after E76 repair

Postby matic_s » Fri Sep 04, 2015 8:26 pm

I'm working on Xbox 360 with Falcon MB.
I was got one red light with primary error code E76.
On the error code list E76 is: Dead network chip
So I was replaced network chip with new one, an now I get E75 primary error code.
On the error code list E75 is: Network chip cold joint / wrong vendor
I was ordered new chip here. Original chip number is: BCM5241XA1KMLG and I was got the same number on the new one.
Is it possible the vendor of the new chip is wrong?

I was measured the power supply voltages on the chip and I get 1.8V on the ENET_AVDD and 3.3V on the V_ENET.

Any idea?
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Xbox 360 - Falcon error E75 after E76 repair

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Re: Xbox 360 - Falcon error E75 after E76 repair

Postby matic_s » Sun Sep 06, 2015 9:39 am

Fixed.
It was bad solder joint on the network chip. I was removed chip and soldered it again.

Network chip is pretty small in the QFN case with thermal pad:
Image

Fixed:
Image
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Re: Xbox 360 - Falcon error E75 after E76 repair

Postby VaNDAL_UK » Mon Sep 07, 2015 9:41 am

nice one thanks for sharing.
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Re: Xbox 360 - Falcon error E75 after E76 repair

Postby Rick48235 » Thu Apr 19, 2018 5:55 am

look on my network chip on my xbox 360 network chip and seen this number and do you cover this part # bcm5241x1akmLg hso735g 835329 1 I see part # BCM5241XA1KMLG is on there except the last few number does those last number on that part count # hso735g 835329 1 this is a falcon board. network chip
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Re: Xbox 360 - Falcon error E75 after E76 repair

Postby Rick48235 » Thu Apr 19, 2018 5:57 am

look on my network chip on my xbox 360 network chip and seen this number and do you cover this part # bcm5241x1akmLg hso735g 835329 1 I see part # BCM5241XA1KMLG is on there except the last few number does those last number on that part count # hso735g 835329 1 this is a falcon board. network chip
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Re: Xbox 360 - Falcon error E75 after E76 repair

Postby matic_s » Mon Apr 23, 2018 8:13 pm

The important markings are: BCM5241XA1KMLG
The other numbers (HSO735g xxxx) are not important. It is manufacturer batch and serial number markings.
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