Inspect entire USB-C areas for corrosion, not only CD3215 chips.
Pay atention to U2800/90, UB000/90 and surrounding resistors.
Pay atention to U2800/90, UB000/90 and surrounding resistors.
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820-00281-a 5v loop
- Thread starter yair37
- Start date
captainmac
Member
following because im having this issue with the missing BMC LDO...
Compare diode mode readings for all LDO rails between all CD3215 chips.
Better if you have working board for comparison.
Better if you have working board for comparison.
captainmac
Member
OK, just wanted to let you know i have resolved all of these with a missing BMC LDO by replacing the TBT ROM (U2890 on a 00840 board). In all of them, the BMC LDOs came back and i got 20v back.
Upload working ROM somewhere please.
This will really help...
This will really help...
captainmac
Member
yeah ill give it a shot.
i have a TL866II reader, but i dont have any fitting adapters for this. i think the chip is in 8pin uson package. Do you know of a good adapter? i could of course solder wires but if theres anything avalable....
i have a TL866II reader, but i dont have any fitting adapters for this. i think the chip is in 8pin uson package. Do you know of a good adapter? i could of course solder wires but if theres anything avalable....
Best options here...
http://www.cmizapper.com/products/t2-chip-stuff.html
http://www.cmizapper.com/products/t2-chip-stuff.html
captainmac
Member
crap, so i got a solderboard (a levelshifter board, but can use it in 3v3 mode as well) that the chip fits onto, but customer needed his machine back early so had to close it up. I do have another repaired board in, i could take the dump off of that?
Only a problem on USB-C areas can generate different behaviour, depending of wich port is connected to charger.
Can be one of the chips above mentioned, or resistors, traces, even protection diodes from data lines.
The dump from exact board model should probably work...
Can be one of the chips above mentioned, or resistors, traces, even protection diodes from data lines.
The dump from exact board model should probably work...
captainmac
Member
hey 2informaticos, i've got the rom soldered on to this board: A4069 from this link: http://www.cmizapper.com/buy/medusa-accessories.html
i have it hooked up to my reader (A TL866 II), but the software doesn't have the right Device ID to read from the chip. all connections are good to the reader (have checked with multimeter)
I have selected W25Q80DV @ WSON8 as device-id, since i think its the closest match, but it won't work (gives me a message saying incorrect package).
I think i need a W25Q80DV @ USON8 (since it's a USON package) but my software doesnt have this particular device-id.
software i'm using is XGPro 8.51, maybe you have an idea of other software to read it?
I'm probably going to give it up if i cant figure it out over the next days since the machine has to go back.
i have it hooked up to my reader (A TL866 II), but the software doesn't have the right Device ID to read from the chip. all connections are good to the reader (have checked with multimeter)
I have selected W25Q80DV @ WSON8 as device-id, since i think its the closest match, but it won't work (gives me a message saying incorrect package).
I think i need a W25Q80DV @ USON8 (since it's a USON package) but my software doesnt have this particular device-id.
software i'm using is XGPro 8.51, maybe you have an idea of other software to read it?
I'm probably going to give it up if i cant figure it out over the next days since the machine has to go back.
A4069 has 2 connection ways; use 3V3 side for this chip.
Check chip to DIL8 adapter pin correspondence.
I ordered A4069/70 adapters, but didn't get them yet to test...
Check chip to DIL8 adapter pin correspondence.
I ordered A4069/70 adapters, but didn't get them yet to test...
captainmac
Member
I think it specifically says to connect it to the port that’s labelled as the 1v8 side (normally used to connect a 1v8 ROM, in that case,the other 3v3-port then connects to the medusa).
The port labelled 1v8 bypasses the levelshifter i.e: the only thing between port and soldered chip is traces.
by the way, there’s a dot on the board to help with orientation. It is correctly oriented on my board now.
my thought was now that my TL866 is not reading the chip because of the wrong deviceID in the software.
do you know if W25Q80DV @ WSON8 matches this chip?
The port labelled 1v8 bypasses the levelshifter i.e: the only thing between port and soldered chip is traces.
by the way, there’s a dot on the board to help with orientation. It is correctly oriented on my board now.
my thought was now that my TL866 is not reading the chip because of the wrong deviceID in the software.
do you know if W25Q80DV @ WSON8 matches this chip?
TL866 doesn't support 1V8 chips directly.
So you need to use the level shifter.
Manually set different codes and see what you can read...
So you need to use the level shifter.
Manually set different codes and see what you can read...
captainmac
Member
yeah this is a 3.3 volts ic though.
i have tried all the possible device IDs this thing has, but no dice.. gonna give up, sorry.
i have tried all the possible device IDs this thing has, but no dice.. gonna give up, sorry.
Could be bad chip, easy to discard trying to read one from other board.
Can be just corrupted dump, or some broken trace of it.
Can be just corrupted dump, or some broken trace of it.
captainmac
Member
well the chip's not bad; it's back on its board now and the machine is fully working again.
i've beeped out the sides of the chip (when it was soldered on the solderboard) to the DIL-legs: everything was correctly connected.
you said you've got a solderboard on the way, right? Maybe try it out when you get it.
i've beeped out the sides of the chip (when it was soldered on the solderboard) to the DIL-legs: everything was correctly connected.
you said you've got a solderboard on the way, right? Maybe try it out when you get it.
captainmac
Member
Yeah could be. I also think there is a large amount of fake and fucked CD3215s for sale. In my experience, all the ones i've bought separately off aliexpress were all shit, and i've bought from 5 different sellers so far.
I only order donorboards now that i take them off of and reball them/ also ordered from louis, but that shit is expensive.
I only order donorboards now that i take them off of and reball them/ also ordered from louis, but that shit is expensive.