A
20:13
A
20:16
Austin CHR ~2210 Mining
20:17
Yours looks different
A
20:17
ARC tester
A
20:17
Austin CHR ~2210 Mining
0.0 ohm there
A
20:17
ARC tester
20:21
You have a short circuit on the 3v3 tester. I would connect a 3v 0.5A laboratory power supply to the isolated ground and a fuse and see what will warm up.
A
20:22
Austin CHR ~2210 Mining
20:23
0.L sorry
20:24
A
20:25
ARC tester
Oh, well, then the dc-dc converter failed
20:26
A
20:26
Austin CHR ~2210 Mining
A
20:26
ARC tester
A
20:27
Austin CHR ~2210 Mining
Volts or ohms?
A
20:27
ARC tester
volts
20:27
this is its input supply voltage
20:28
5v
A
20:28
Austin CHR ~2210 Mining
20:28
Like this?
A
20:28
ARC tester
yes
A
20:28
Austin CHR ~2210 Mining
Making sure before I power on
20:29
A
20:31
ARC tester
The input voltage is there, the load resistance is normal, there is no output voltage, it is necessary to change the DC-DC converter
A
20:32
Austin CHR ~2210 Mining
The aimtec?
A
20:32
ARC tester
AM1G-0503AZ
20:33
AM3G-0503AZ
A
20:33
Austin CHR ~2210 Mining
Which one?
A
20:33
ARC tester
one of them, any
A
20:34
Austin CHR ~2210 Mining
Trying to source part
20:38
Does anyone have one,
20:41
You mean AM1G-0503SZ or 3G right
A
A
20:46
Austin CHR ~2210 Mining
cant find anything in stock
A
21:00
ARC tester
In reply to this message
with modifications, you can put another one, you will have to solder with wires (
21:00
68,47 руб. -27％ | DC-DC при напряжении от 5 В до 3,3 В/12 В/15V 12V 15V/24V 1W нерегулируемые мини изоляция рубильник Питание модуль 1D1224/1215/0515/0512/0503
https://a.aliexpress.com/_DD0zofH
https://a.aliexpress.com/_DD0zofH
A
21:23
Austin CHR ~2210 Mining
21:23
21:24
If I inject 3v3 constantly will this be an issue?
A
21:35
ARC tester
In reply to this message
it needs a ground-isolated power supply, otherwise there may be problems.
A
21:56
Austin CHR ~2210 Mining
A
22:29
Austin CHR ~2210 Mining
Okay, got the 3v3 back, after reseating the almtec
22:30
22:30
22:30
22:30
Same issue tho
A
22:32
ARC tester
In reply to this message
this is not an isolated cold side power supply, it is the power supply of the tester itself. And you need to power the hash board!
A
22:33
Austin CHR ~2210 Mining
Hashboard is being powered
22:34
Has 21v
A
A
22:34
Austin CHR ~2210 Mining
Yes
22:34
And 5v
22:35
Both 3v3 now work, and same with 5v
A
22:35
ARC tester
21v is the power supply of the cores
A
22:35
Austin CHR ~2210 Mining
You mean 3v3 on hashboard?
22:35
From jig right?
A
22:35
ARC tester
yes
A
22:36
Austin CHR ~2210 Mining
Let me check
22:36
Wouldn't need the 21v on right?
A
22:37
that is, now there are 3 volts after the fuse, is the problem still there?
A
22:37
Austin CHR ~2210 Mining
Pin 15 or 16 on io port?
A
22:41
I'm just a little confused, did you solder the DC-DC converter back in and you got 3 volts?
A
22:45
Austin CHR ~2210 Mining
3v3 out of io, check
22:46
22:46
It did try to sense the pic
22:47
But is does not auto detect
22:47
Faulty pass as well
A
22:49
ARC tester
if you connect the board, 3 volts will remain?
A
22:53
Austin CHR ~2210 Mining
22:53
22:53
22:53
On both logic switches
A
22:53
ARC tester
this is an ADUM1250 i2c insulator, if there is 3 volts, are you sure that the hash board is working, then the problem is in it
A
22:53
Austin CHR ~2210 Mining
We were told to replace this, which we did
22:54
Thought it was the fuse, but my tech confirmed this is what they replaced
22:54
Which pin for 3v?
A
22:56
ARC tester
A
22:58
Austin CHR ~2210 Mining
This ic was changed
22:58
22:58
22:58
22:58
All 3 legs have 3v3
A
22:59
ARC tester
as far as I understand, you have 3 volts, we can forget about the fuse and power.
A
22:59
Austin CHR ~2210 Mining
23:00
Yes, we have 3v3 out of io port
A
23:01
ARC tester
I think it is necessary to replace ADUM1250
A
23:01
Austin CHR ~2210 Mining
23:01
I can try to reflow it
23:01
What can I test on it?
23:02
It seemed to happen after the newest update
23:02
Is there a way I can reflash it?
A
23:03
ARC tester
having connected a known working board, press start and look with an oscilloscope for the presence of signals on the SDA and SCL
23:04
you had a problem with the DC-DC converter, why do you think that this may be due to the update?
A
23:06
Austin CHR ~2210 Mining
Because this is when it first occurred
23:06
Was after an update
23:07
I'll go check in a second
A
23:07
ARC tester
but the power problems cannot be related to the software in any way!
A
23:08
Austin CHR ~2210 Mining
We have voltage
23:08
All voltages so far have been present
23:09
I'll test with oscilloscope now
A
23:09
ARC tester
but you threw me photos that said there was no voltage, did I understand something wrong?
A
23:09
Austin CHR ~2210 Mining
I have all voltages now
23:09
After reflowing the dc-dc ic it now has 3v3
23:09
And the io has 3v3
23:10
Same with the board as well
A
23:15
PIC and EEPROM are on the i2c bus, decoupling is necessary between the tester and the hash board, we use ADUM1250 as it, if your EEPROM is not read and you see a PIC error, it means the bus is not working. The culprit can be either a faulty hash board or an ADUM1250.
A
23:28
Austin CHR ~2210 Mining
23:28
23:29
You mean adum1402
23:29
?
23:29
23:30
The 16 pin not the 8 pin ic, right?
A
23:33
ARC tester
this
23:34
measurements can only be made with the board connected!
A
23:35
Austin CHR ~2210 Mining
We just replaced this
A
23:35
ARC tester
the signals must be on these two pins
A
23:35
Austin CHR ~2210 Mining
We have 3v3
23:35
On those two, and the one to the right of them
A
23:36
ARC tester
23:37
the signals should look something like this
23:38
have you replaced the ADUM1250?
23:38
is your hash board exactly working?
23:38
how many boards have you tried to connect?
A
23:42
Austin CHR ~2210 Mining
Connected several boards
23:42
I own a repair shop
23:43
Yes, we replaced adum1250
A
23:43
ARC tester
do these boards work in the miner?
A
23:43
Austin CHR ~2210 Mining
Yes
A
A
23:44
Austin CHR ~2210 Mining
Yes
A
23:45
ARC tester
don't you have an oscilloscope?
A
23:46
Austin CHR ~2210 Mining
I do, several types
A
23:47
ARC tester
where did you get the ADUM1250? Could it be faulty?
A
23:47
Austin CHR ~2210 Mining
Possible, but doubt it
A
A
23:48
Austin CHR ~2210 Mining
We have another one somewhere, but my tech misplaced it
23:48
I have several types if oscilloscopes
A
23:49
ARC tester
there are no options left, it can only be him, well, or the gpio ESP32 has failed, which is very unlikely
A
23:50
With oscilloscope?
A
23:50
ARC tester
yes
23:51
with an oscilloscope trigger, it will be easier to do this
A
23:57
Austin CHR ~2210 Mining
23:57
A
23:58
ARC tester
it looks as if there is no contact with the GND about the oscilloscope
2022-July-2
A
A
00:07
ARC tester
In reply to this message
The hash board is not connected, do you reboot the tester and see this message?
A
00:18
Austin CHR ~2210 Mining
Yes
00:18
Found my other replacement adum1250
00:19
In reply to this message
Is this installed correctly? About to place my other replacement part
A
A
00:27
Austin CHR ~2210 Mining
Alright, old one off, another new one going on
00:30
New one on, fingers crossed 🤓🤞
A
00:31
ARC tester
Sticker
not-archived
🧚♀️, 72.0 KB
A
00:34
Austin CHR ~2210 Mining
No go
00:34
A
00:35
ARC tester
if you now press the start of the test with the connected board, what will happen?
A
00:37
Austin CHR ~2210 Mining
00:37
2nd brand new adum1250
00:38
No auto detect board either still
A
00:39
ARC tester
please tell me the serial number of the tester
A
00:40
A
A
00:42
Austin CHR ~2210 Mining
Well we both are stumped
A
00:43
ARC tester
In reply to this message
once again I want to clarify the conditions. 1.the board is disconnected from the tester. 2. You turn on the tester. 3. see this message. So?
A
00:43
Austin CHR ~2210 Mining
Yes
00:44
And it does not auto detect the board when plugged in
A
00:45
ARC tester
in this case, the tester believes that the board is connected, the second ADUM is responsible for this. But I somehow stopped understanding what was going on here 😅😂
A
00:46
Austin CHR ~2210 Mining
Before, it would give l3 co 1v instead of 1.8v, on working board. Haven't tested this recently after the adum swaps
00:46
But gives same error
A
A
00:48
Austin CHR ~2210 Mining
.jpg)
I just ordered a few of these, just in case adum1402
00:48
It's a past issue the arc was doing
A
00:49
ARC tester
Ok
A
00:49
Austin CHR ~2210 Mining
Just giving you more info or diagnostics
A
00:50
ARC tester
do you have ADUM1402 now?
A
00:50
Austin CHR ~2210 Mining
No, unfortunately
00:50
Won't get here for a couple weeks
A
00:51
ARC tester
A
00:52
Austin CHR ~2210 Mining
But I can reflow it
A
00:53
ARC tester
if the tester sees the board with the board not connected and tries to determine it, then the signal is a plug, and in our case ADUM1402 is incorrect
A
00:56
Austin CHR ~2210 Mining
Just reflowed it, hope it fixed it, if not we shall find out if the adum1402 fixes it in a few weeks
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