Re: VStanby (V SB) question ?
here's the photo :
here's the photo :
Attached Files
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Re: VStanby (V SB) question ?
test with SBL2040...correction from SBL1040...
and some capacitor photos I've replaced...Attached FilesComment
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Re: VStanby (V SB) question ?
is there any quick way testing FET with DMM ? I see the D S diode connection 0.546V looks like this FET is ok...Comment
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Re: VStanby (V SB) question ?
what I've done with FET CEP603...
I connect DMM on diode test...black lead to S and Red to D....it's OL...
then I touch red probe to G to make it ON and I got 0.247V....is it good enough....
then I touch black probe to G to make it OFF and I got OL again...
I reckon this FET is ok....any opinions ?Comment
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Re: VStanby (V SB) question ?
so the most possible faulty part is SBL2040 or SG6105, but I'm not sure for this PWM controller ...could be still good only shutting down the PSU because of no voltage from SBL2040..Comment
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Hello,
I am troubleshooting a power supply.
When measuring a FCL30A015 diode it shows 35 Ohm when reverse biased and 0.05 forward voltage.
See attached.
The datasheet does say "Extremely Low Forward Voltage Drop": https://www.alldatasheet.com/datashe...FCL30A015.html
But 0.05V seems to low.
Is it gone?
Should I perform some other test?... -
Hello, I am looking for help to replace a damaged diode. The tristar was replaced and a diode was damaged in the process. I have a picture of the diode but dont have an exact donor. I mostly have macbooks for donors and only a few ipad and iphone boards. Diode part number: DSF01S30SCAP
Im not sure where to find the ipad board number. Anybody have an idea where else this diode is used on other boards? Thanks.... -
Hello everyone, I'm repairing an LG TV backlight and I noticed some strange behavior when I touching the backlight strip with a missing Zener diode.
So I replaced the leds on the strips and they seemingly working fine, but soon as I touch the strip which has a missing Zener diode the whole backlight turns off for a few seconds and then turns back on.
Is this caused by the missing diode? If so what kind of zener diode should I use to replace it?.
The led strips has 9 6V leds.
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Hello everybody☺️ I am glad to be here and looking forward to a good discussion.
First of all, I am new here. Therefore I will shortly introduce myself.
I am Nico and currently I study Physics.
In my freetime I like to build and repair stuff. Especially big battery's.
A few years ago I got myself an electric unicycle, monowheel or however you call that.
The battery bms was broken so I replaced and resolder that. Nothing big.
I used this thing for some years and had a lot of fun. Unfortunately I used it last time in heavy rain. Usually everything... -
I was looking at an old battery powered electric lawnmower I picked up as the previous owner didn't want to buy a new board to replace a ruined old board. Tried to study how it was designed - it appears it has a huge 80A contactor...or rather, a 80A relay. It appears to be SPDT to control the motor. A 30A relay protects the circuitry.
The weird thing I don't quite get is how this thing is connected. The common contact is connected to the motor. The NO contact is connected to the battery, which is expected, so when the relay is activated, the common is connected to the NO contact and...
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