12V on the 5V rail

A Former User

looks like the board is a revision 1.03 board that uses a TC2117 which is not compatible with AP7361C-33E-13 but ~~should~~ could be compatible with AP7361C-33ER-13

Haggan90

@bearer Aw crap haha
Might I have destroyed the PCB even more now?

A Former User

@Haggan90 not sure; i would guess u2 took the blunt of the force this time as well.

you'll just have to remove it and see if the board still works with external 3.3v I guess (or wait for the correct part)

But do double check it is a rev 1.03 board

Haggan90

@bearer Ok!
Yeah, It is a V1.03 board.
Is it possible that the Wifi Module and the SD card reader is OK or do I have to change one/both of them as well?

A Former User

@Haggan90 as I said I'm not sure, head isn't quite on the right way but I'm guessing you essentially fed -5v into the 3.3v output of the regulator which it didn't like.

odds are if nothing else got warm the damage is contained, but as i said, remove the wrong regulator and test it with an external supply and you'll have the answer.

A Former User

@bearer said in 12V on the 5V rail:

but should be compatible with AP7361C-33ER-13

@Haggan90 just clicked in my head the AP7361C doesn't specify if the tab is connected to v-out or gnd or anything at all; so I can't say for sure if it works.

TC2117-3.3VDBTR is the full partno from the 1.03 schematic.

Haggan90

@bearer said in 12V on the 5V rail:

TC2117-3.3VDBTR

IS this the correct one?
https://www.digikey.se/product-detail/sv/microchip-technology/TC2117-3-3VDBTR/TC2117-3-3VDBCT-ND/7065613

A Former User

has the same manufacturer part number as on the schematic at least, so thats about as sure as I can get.

"Tillverkarens artikelnummer TC2117-3.3VDBTR"

(the key to decoding the part numbers are usually towards the end of the datasheets, helps decode the various letters and numbers)

Haggan90

@bearer Hi!

I have now changed the U2 and I can connect to the board via USB
It seems like maybe the WiFi module is broken, but is there any way I can check that over YAT?

A Former User

just follow the getting started guide to set up wifi again, if it responds to M552 and connects you're good.

Haggan90

@bearer ok!
The blue LED does not light up on start, is that a bad thing?

Haggan90

@Haggan90
Ok, it seems like I can't get the Wifi module into idle mode.
Also, I do belive it get's a bit warm, not hot but warm.

M115
FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 2.05.1 ELECTRONICS: Duet WiFi 1.02 or later FIRMWARE_DATE: 2020-02-09b1<LF>ok<LF>
M552 S-1
WiFi module stopped<LF>ok<LF>
M552 
WiFi module is disabled<LF>ok<LF>
M552 S0
ok<LF>
M552
WiFi module is being started<LF>ok<LF>
M552 S0
ok<LF>
M552 S0
ok<LF>
M552
WiFi module is being started<LF>ok<LF>
M587
M587: Failed to retrieve network list<LF>ok<LF>

Phaedrux

@Haggan90 try deleting all saved wifi networks with M588 S"*" (That is, using an asterix for the network name), then re-adding it with M587. For example, M587 S"networkname" P"password".

Haggan90

@Phaedrux Hi, I get this:

M588 S"*"
M588: Failed to reset the WiFi module to factory settings<LF>ok<LF>

Haggan90

@Phaedrux The SD-Card seems to be fine.
Do I need a hot air desoldering station to change the Wifi Module? And, what would I need to do after I've changed it?
This is what I get when sending M21.

M21
SDHC card mounted in slot 0, capacity 3.98Gb<LF>ok<LF>

A Former User

@Haggan90 said in 12V on the 5V rail:

Do I need a hot air desoldering station to change the Wifi Module?

A good preheating and some quickchip or similar 138C-ish melting point solder might to the trick; but most likely "yes".

edit: oh, and after all you need to do is run M997 S1, presuming the wifi firmware file is in the /sys folder on the SD card.

Haggan90

@bearer Thank you! I will see what I come up with to desolder it
Is there any special version of the ESP-12S Wifi Module I need?

A Former User

@Haggan90 said in 12V on the 5V rail:

ESP-12S

Thats about as specific as you can get, but no, any ESP-12 ought work, the 12S has all the right certifications on it which is important for Duet3d selling them, not so much for you. I.e. you could use a 12E or F if easier to obtain (or pretty much any other ESP with the same footprint)

(the ESP-07S is an official option if you want external antenna, just make sure to never run it without antenna attached to avoid damage to the rf tx)

Haggan90

@bearer Thanks!
I just ordered a ESP-07S as I have a bunch of these antennas laying around, hoping for a bit better range on the WiFi then

Haggan90

Manage to desolder it using a regular soldering iron, now I just need the new chip!