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HERETIK10 started a topic QFN32 IC Chip identification (Synology DS418)

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

10-24-2024, 04:58 AM
QFN32 IC Chip identification (Synology DS418)

Hello everyone and thank you to everyone who will take their time to help me.
I have my Synology NAS motherboard that no longer boots. I have identified a short circuit IC, but I cannot find the chip reference. I think it is made by Global Mixed Mode Technology inc... I am attaching a photo.
Does anyone have a lead or a clue?...

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HERETIK10 replied to MSI GT70 2PE Voltage dropping on the main power rail

in Troubleshooting Laptops, Tablets, and Mobile Devices

11-25-2023, 03:27 AM
Is it possible that a failing CPU mosfet could create this type of problem?

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HERETIK10 replied to MSI GT70 2PE Voltage dropping on the main power rail

in Troubleshooting Laptops, Tablets, and Mobile Devices

11-24-2023, 07:51 PM
Thanks for your response, but I don't think it's a charger problem. Indeed, once the voltage drops too low, the PC goes on battery, it looks like I have something shorted on the main rail which creates resistance. But I don't see what it could be... I soldered a wire directly to the output of PQ14 from my lab power supply and the problem remains the same. The voltage drop begins at low consumption (1A) and intensifies as a load is applied.

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HERETIK10 replied to MSI GT70 2PE Voltage dropping on the main power rail

in Troubleshooting Laptops, Tablets, and Mobile Devices

11-24-2023, 07:48 AM
Thank you for your answer. Yes no problem at this level, I had the problem with my original charger and my 60V 12A lab power supply.

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HERETIK10 started a topic MSI GT70 2PE Voltage dropping on the main power rail

in Troubleshooting Laptops, Tablets, and Mobile Devices

11-24-2023, 06:06 AM
MSI GT70 2PE Voltage dropping on the main power rail

Hi everyone,
I have a strange problem (for me) on an MSI GT70 2PE laptop.
When it's under heavy load, power goes steadily to the battery (for 2 or 3 seconds) then return to the charger. If I remove the battery it turns off.
The higher the load, the lower the voltage on the main rail. We go from 19.5V, PC connected to the charger but turned off (normal consumption of 0.06A)
On, when it draws 2A the voltage is 19.2V, then eventually collapses to 18.5V (and turns off) around 5A.
I removed the first 2 mosfets (PQ13 & 14) from the main rail, without noticeable change....

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HERETIK10 replied to Adaptable charger voltage for Clevo D901C laptop

in Troubleshooting Laptops, Tablets, and Mobile Devices

11-19-2023, 08:51 AM
Re: Adaptable charger voltage for Clevo D901C laptop

Problem solved. It was the new charger that was defective! As soon as we put a load on it, it goes into safety... I took the entire PC apart. I confirm that there is no ID pin, just +20V and ground.

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HERETIK10 replied to Adaptable charger voltage for Clevo D901C laptop

in Troubleshooting Laptops, Tablets, and Mobile Devices

11-18-2023, 03:02 PM
Re: Adaptable charger voltage for Clevo D901C laptop

Thank you very much Techtiger for the time you took to help me. I'll come back when I can diagnose the machine.

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HERETIK10 replied to Adaptable charger voltage for Clevo D901C laptop

in Troubleshooting Laptops, Tablets, and Mobile Devices

11-17-2023, 11:05 AM
Re: Adaptable charger voltage for Clevo D901C laptop

Thank you for your response Techtiger, I will have to motivate myself to open the PC... But I do not understand anything anymore. I contacted CLEVO after-sales service and they just answered me. They gave me the exact part numbers of the charger (as well as the schematic which is the same), and there is no pin for ID. In the photo of the charger they sent me, you can clearly see pin 1 and 2 in 20 volts; 3 and 4 to ground. But of course it doesn't work with my PC whose charger goes into safety mode.

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HERETIK10 replied to Adaptable charger voltage for Clevo D901C laptop

in Troubleshooting Laptops, Tablets, and Mobile Devices

11-13-2023, 11:41 AM
Re: Adaptable charger voltage for Clevo D901C laptop

Thanks again Techtiger for your response. I just posted the schematic :
[url]https://www.badcaps.net/forum/showthread.php?p=1289562#post1289562[/url]
On the other hand, I tried several translators but I didn't understand what you want me to measure (PS I'm French).Re: Adaptable charger voltage for Cl... hand, I tried

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HERETIK10 started a topic Clevo D900C D901C / Sager NP9260 NP9261 Service Manual & Schematic

in Schematic Requests ONLY!

11-13-2023, 11:28 AM
Clevo D900C D901C / Sager NP9260 NP9261 Service Manual & Schematic

Service Manual & Schematic...

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HERETIK10 replied to Adaptable charger voltage for Clevo D901C laptop

in Troubleshooting Laptops, Tablets, and Mobile Devices

11-13-2023, 01:22 AM
Re: Adaptable charger voltage for Clevo D901C laptop

Thank you Techtiger for your response. Do you think that if I plug in a Dell 230W charger, with its ID pin on Pin 4, it could work or would it be dangerous?

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HERETIK10 replied to Adaptable charger voltage for Clevo D901C laptop

in Troubleshooting Laptops, Tablets, and Mobile Devices

11-11-2023, 10:53 PM
Re: Adaptable charger voltage for Clevo D901C laptop

up

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HERETIK10 started a topic Adaptable charger voltage for Clevo D901C laptop

in Troubleshooting Laptops, Tablets, and Mobile Devices

11-08-2023, 04:24 PM
Adaptable charger voltage for Clevo D901C laptop

Hello everyone,
Thanks in advance to anyone who takes the time to help me. Sorry for the quality of my English, I had to use a translator at times...

I bought a functional Clevo D901C (Sager NP 92261) with its battery but without its power supply.
So, I invested in a new LiteOn charger, advertised by an online seller as the right charger for my machine... BUT, according to the pinout (4pin + shell) of the charger, 1 and 2 are 20V / and 3 and 4 are grounded. When I measure pin 4 with the ground of the PC, I have 300kOhms, which seems to be confirmed by the electrical...

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HERETIK10 replied to New Members - please post your introductions here

in Announcements & Related News

11-08-2023, 10:16 AM
Re: New Members - please post your introductions here

Hello everyone,
a little passage of greetings from France, from a laptop PC collector.
I really appreciate this forum, which was able to help me restart some machines that had become capricious over time...
I have almost all thinkpads under IBM production, Dell XPS and precision up to the M1730, zenith, hp compaq etc.
Looking forward to reading you !

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QFN32 IC Chip identification (Synology DS418)

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MSI GT70 2PE Voltage dropping on the main power rail

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Clevo D900C D901C / Sager NP9260 NP9261 Service Manual & Schematic

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Adaptable charger voltage for Clevo D901C laptop

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