SoulFreeze
Member
Last Activity: 06-07-2025, 01:35 PM
Joined: 06-19-2023
Location: Texas
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Made a mistake on the diagram, the torroid should be between the tranformer side fets, as shown...
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Inverter Charger architecture question
Hello all, I have a mastervolt charger inverter I'm trying to repair, as I have no schematics I decided to trace our some of the parts to figure out the general operation.
I managed to trace our a rough block diagram of the power stage, and I'm quite interested in the operation.
Here are my questions.
I noticed there seems to be no dedicated charging section in the circuit. After some googling I assume this is what they called a bidirectional power design. Would like to know if my assumption of the operation are right.
Given that there are no diodes. I am assuming... -
Thank you very much. removed the chip and the short on the inductor is gone, placed an order for the chip, so might be a while till i post any updates. Wondering if there is a simple way to temporarily apply power to the rail to do test in case i need more components, Or just wait for the chip?...Leave a comment:
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Did some further digging, Found a short on this component, Marked CWFEVA, some sort of DC-DC converter. Cant find datasheets, anyone have a clue what it is?...
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Lenovo Slim Pro 7 14ARP8 83AX No Power
Hello All, I have a Lenovo Slim Pro 7 14ARP8 83AX, Board No NB6369A_MB_V5
Behavior - Pressing power button results in three second led blinks on the button,
Connecting charger lights up orange as normally would while charging.
Connecting charger without battery blinks orange.
No fanspin.
Tried flashing bios, no change.
I inspected the board and found a burnt component on the USB / Power button daughter board. I assume the comonent was an esd protection diode as it was on the USB A port power rails. removed the component but still exhibits... -
Correction, Board Number is NB6369A_MB_V5
Also would appreciate if one could suggest a similar board schematic i can use as a guide...Leave a comment:
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Thanks alot, Trying to find a suitable equivalent as this is not available via mouser/digikey
Thinking of going with the texas instrument CSD18534KCS im assuming should work fine? Most of the specs seem to be around the same...Leave a comment:
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Help finding datasheet for component marked G34662
Hi, pulled this component, (I'm assuming it's a MosFET) from an LED COB video light. Im trying to find the datasheet so I can find an equivalent replacement but no luck. Any assistance with the datasheet would be appreciated.
Failing that, a way to pick a suitable replacement component? If it's indeed a switching fet, I'm assuming I might need to measure the switching clock frequency and find a component that meets the power capacity?
Its a pair of them driving a 130w Light. Takes in 19volts. I can borrow a scope to measure the switching freq.... -
Lenovo Slim pro 7 14AR8 looking for schematics, boardview
Looking for schematics and boardview fir Lenovo slim pro 7 14ARP8
S/N YX063148
Board no NB6365_A_MB_V5 -
Tried this as wee, no change. I'm suspecting its hardware related...Leave a comment:
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thank you, unfortunately still no boot after flashing,same 3 sec blinking power button, suspecting it might be hardware issue...Leave a comment:
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Lenovo Slim Pro 7 14ARP8 BIOS request
Hello everyone, looking for bios for a Lenovo Slim Pro 7 14ARP8
its non booting, power button blinks lenovo
S/N YX063148
I made a dump of the bios here... -
Hi, Not sure if im supposed to create a new thread for this or if this is the correct thread as per rules,
I have a Lenovo Thinkbook 13s G3 ACN 20YA0012US s/n R914BDZE which is stuck on a blinking display bootloop after updating bios.
I managed to dump the current corrupt bios. Im hoping I can have DMI transferred to latest bios if possible. Thanks...Leave a comment:
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Hello everyone, I am an electronics hobbyist who does a little of tinkering wherever I find the opportunity. Very happy to join this community.Leave a comment:
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