yea it refuses to go into DFU by jumper method or standard keyboard method.
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Would you have any donor boards? Even locked boards are ok.
The DFU will reflash the ROM @ U2010. If available to you, remove the same from a donor board and transplant onto this board for testing. This is a 1v8 ROM device.Comment
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I have a couple 820-02100-11 boards, this is a 820-02100-A, will those work? I also have a programmer that can read these chips if that is helpful at all.Comment
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According to Master Liu - the T2 ROM chips are not serialized. You should be able to remove from a good donor board and place onto this one for testing. Be sure to keep track of pin #1 and be patient. Curious to hear of your progress.Comment
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Ok, I’ll do this first thing monday when I get back into the office and update the thread. Thank you very much for all your help, I took a bunch of notes.Comment
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Swapped the chip over and still same thing, no DFU pulling 5.19v and 0 ampsComment
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How are you gauging the 0A current draw? Is this with a USB-C meter? Is the meter reliable and bidirectional type? At 0A, there is no load which is not correct. You should have at least a few mA current draw.Comment
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yea its just a standard usb c meter, i can hookup to my dc power supply and see if it pulls any thing.Comment
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Q5232 should there be cont between pin 1 and pin 4?Comment
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pin 4 on q5232 in diode mode should be .920 according to my boardview and its reading .557Comment
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No. If shorted, then the GATE & SOURCE pins are shorted. The gate pin must be isolated from the source and drain pins. Be sure the meter probe is not shorting onto the source pins.Q5232 should there be cont between pin 1 and pin 4?Comment
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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... -
Hello Everyone,
I have 1 diode on a circuit that I suspected to be faulty because the forward and reverse bias has a voltage drop reading.
While compared to the reading of another diode from the next channel it won't read at reverse bias.
Now the problem is; it does not have any body marking.
So I tried to sketch the diagram and found out that it is connected to the base and collector of the C3632 transistor.
What do you think is this diode?
Can you please suggest what part number can i use to replace this faulty diode instead?
Hoping that you... -
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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