• XBOX Series X Power Supply Repair, Model 1920, PCB board Liteon PA-1321-06M1

It is currently 27 October 2025, 23:56

XBOX Series X Power Supply Repair, Model 1920, PCB board Liteon PA-1321-06M1

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  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
  2. Topic message should contain: the PCB marking code (required in case of hardware repairs), an extended description of problem, things you have checked/replaced/measured, your conclusions and the question. If you are not able to find the PCB marking code, please read THIS TOPIC. If you still cannot locate the PCB markings, please upload a clean, both-side photos of the mainboard - it is required to remove any films, modules or brackets possibly covering these markings.
  3. Before posting a new topic please read all topics in TRAININGS subforum and make a preliminary diagnostic based on the content of those trainings.
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#1 XBOX Series X Power Supply Repair, Model 1920, PCB board Liteon PA-1321-06M1

by RafiManch • 24 October 2025, 19:47
Hello Everyone,
In one of power supplies what I want to repair 2 resistors has been burnt.
This was the original fault causing 12V being missing on the output.
I have replaced them and there was no low resistance to ground but they have burnt again.
Image
Image
Image
I have checked/measured all components and there was not any odd readings indicating failure.
Resistors are on 12V output monitoring the value. Has anyone had the same problem please ?
I hope someone can point me to the right direction.
Thanking you in advance.
Regards,
Rafal

Re: XBOX Series X Power Supply Repair, Model 1920, PCB board Liteon PA-1321-06M1

by Google Adsense [BOT] • 24 October 2025, 19:47

#2 Re: XBOX Series X Power Supply Repair, Model 1920, PCB board Liteon PA-1321-06M1

by matic • 26 October 2025, 13:04
Hello!

Check the marked four MOS-FET transistors.
Image
If they are fine, please post a picture from a 90° angle with visible copper traces around the burned resistors.
Also post a picture from the other side of the board.

#3 Re: XBOX Series X Power Supply Repair, Model 1920, PCB board Liteon PA-1321-06M1

by RafiManch • 26 October 2025, 22:06
Hi Matic,
Thank you for looking into the problem.
All 4 mos-fets measure ok. Between source and drain 0.4 voltage drop (in diode test) one direction and OL with reversed probes. Please see attached additional pictures.
Image
Image
Image
Image

Re: XBOX Series X Power Supply Repair, Model 1920, PCB board Liteon PA-1321-06M1

by Google Adsense [BOT] • 26 October 2025, 22:06
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