Re: Huntkey PSU HK340-72fp Problem
possible that your resonance IC is the main problem
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Huntkey model: Hkf1502-3b
I would like to share with you the good voltage testing of SMPS HK1502-3B for Lenovo All In one computer.
this is resonance Half bridge.
The 198VDC comes from the resonance IC supplying the Transformer for the 12VDC.
2. Check first the Big Filter capacitor using voltage testing (DC) with around 395 -400VDC if sometimes you see 350V check the Big Filter capacitor first but for me I all I encountered the IC for the resonance IC has issue if 198VDC is show this means that resonance IC is working properly.
3. Other issue mostly the POWER...
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Re: No power, Sony vaio
Hi same with me I have the same issue and as per my checking the schematic is different with the actual board layout.
What could be wrong here I already checked using diode mode and it seems there is no 19v at DCbout.
Please help me...
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Yamaha PSR-31 No power
Guys!
I would like to share that one of my clients ask me that his Yamaha PSR-31 has no power. after thorough checking and asking for a solution and how to check this equipment I found out that certain capacitors and regulator TD880 are leaky and shorted.
Please see the attached picture.
just used the diode mode....Last edited by EonFlask; 03-02-2020, 07:43 AM.
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Need ltm11-mb-1324 schematic Diagram Plz!
Hi Guys,
I'm Stuck with this problem ltm11-MB-1324 laptop motherboard and I don't know what to do, I already tried to measured MOSFETs and other components within the aforementioned laptop but I don't know where is/are the problem based on the measured value and another thing if you have schematic diagram I would like to ask if you can give me.
Help is highly appreciated!
Thank You....
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Re: New Members - please post your introductions here
Hi everybody!
First of all thank you for accepting me as a member, I joined here to learn something and share my adventure in electronics reparing even if some of it came from luck, repaired by accident or persistence to know how it works, I hope that someday I'll be one of the successful repairer just like you guys!.
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