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Old 08-16-2019, 10:27 AM   #21
jmbinette
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

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Originally Posted by stj View Post
not much to it if it matches either of these:
Actually it matches this schematic (resistor and cap ID are different but circuit is the same.
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Old 08-16-2019, 11:52 AM   #22
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

The triacs (BTA16-600B) are known to short circuit and the heater stays stuck on. Very dangerous and will burn down your house! Never leave these cheap chinese stations plugged in all the time, I pull the power cord after I am finished.
The triac does need a heatsink, so make sure you have one or it will just overheat and short.

The exact 858D schematic depends on your PCB version. Post pictures if you are not sure. This is 858D+ schematic which is similar.
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File Type: pdf YouYue 858D+ Schematic 858D06 As-wired.pdf (55.2 KB, 12 views)
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Old 08-16-2019, 12:32 PM   #23
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

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Originally Posted by redwire View Post
The triacs (BTA16-600B) are known to short circuit and the heater stays stuck on. Very dangerous and will burn down your house! Never leave these cheap chinese stations plugged in all the time, I pull the power cord after I am finished.
The triac does need a heatsink, so make sure you have one or it will just overheat and short.

The exact 858D schematic depends on your PCB version. Post pictures if you are not sure. This is 858D+ schematic which is similar.
The standby function isn't working, but that doesn't , mean the Triac is shorted.
It heats properly to whatever temperature I set and then maintains it.
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Old 08-16-2019, 12:49 PM   #24
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

if the cpu pin is changing between 5v and 0v when you put the handle on the holder then the cpu is bad i imagine.
otherwise you need to check the reed isnt cracked etc.
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Old 08-16-2019, 12:50 PM   #25
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

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if the cpu pin is changing between 5v and 0v when you put the handle on the holder then the cpu is bad i imagine.
otherwise you need to check the reed isnt cracked etc.
I received a second unit from amazon with the same behavior... weird !

And yes the cpu pin is changing between 0V and 5V.
Anything would prevent the cpu from triggering the input?
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Old 08-16-2019, 02:22 PM   #26
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

only a software function - try picking it up, putting it back, then waiting.
they do have a delay.
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Old 08-16-2019, 04:29 PM   #27
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

Are you positive you have the right MCU pin?
The reed switch sees the magnet only when in the cradle, so it closes and I/P goes from 5V to 0V.

The chinese are trying to put hardware copy-protection in their soldering stations, as they steal firmware from others. To prevent cloning, the firmware guy will move an I/P pin so the clone pc boards no longer work. Small chance but this might be what you're seeing.
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Old 08-16-2019, 05:26 PM   #28
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

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Originally Posted by redwire View Post
Are you positive you have the right MCU pin?
The reed switch sees the magnet only when in the cradle, so it closes and I/P goes from 5V to 0V.

The chinese are trying to put hardware copy-protection in their soldering stations, as they steal firmware from others. To prevent cloning, the firmware guy will move an I/P pin so the clone pc boards no longer work. Small chance but this might be what you're seeing.
For the record, here is another PCB to add to the "clones database" ! lol

I re-tested everything and pin 18 on the IC is really switching from 5V to 0V(Wand on the holder)
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File Type: jpg IMG_20190816_1744506.jpg (372.2 KB, 12 views)
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Old 08-16-2019, 10:17 PM   #29
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

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Originally Posted by jmbinette View Post
I re-tested everything and pin 18 on the IC is really switching from 5V to 0V(Wand on the holder)
I think what redwire is saying, is that Pin 18 may not be the pin the firmware is actually expecting the sleep signal on. As far as the software is concerned, Pin 18 may not even exist - the software might be waiting to see that sleep signal on say, Pin 17 instead.

Or, the software might not even have a sleep function at all!
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Old 08-16-2019, 10:21 PM   #30
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

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I think what redwire is saying, is that Pin 18 may not be the pin the firmware is actually expecting the sleep signal on. As far as the software is concerned, Pin 18 may not even exist - the software might be waiting to see that sleep signal on say, Pin 17 instead.

Or, the software might not even have a sleep function at all!
I tried every input pin with a jumper (both high and low) without any success of finding "the hidden input"

Seems like the device was not programmed with a standby mode but the manual says clearly that it has one ...

I bought the first unit, returned it and now this one has the same problem. I wondered if I could repair it easily but seems like I will also return this 2nd piece of Chinese cr*p !!
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Old 08-17-2019, 12:52 AM   #31
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

That's really weird. I wonder if it could be something enabled or disabled in settings that are stored in the EEPROM. Does it remember the temperature setting when you power it off? I'd poke around the menus if it has any.

Otherwise, the only fix would be an MCU adapter board that people have made for these.
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Old 08-17-2019, 04:03 AM   #32
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

the replacement formware thing is interesting, but i have not tried it - my unit works fine as it is.
although i did think about changing it so i could use an oled display!
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Old 08-17-2019, 07:47 AM   #33
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

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Originally Posted by redwire View Post
That's really weird. I wonder if it could be something enabled or disabled in settings that are stored in the EEPROM. Does it remember the temperature setting when you power it off? I'd poke around the menus if it has any.

Otherwise, the only fix would be an MCU adapter board that people have made for these.
Only setting I found is pressing the 2 buttons at the same time and I can set the default power-on temp. And it gets remembered by the EEPROM.

As for the replacement firmware ... I would consider it but would rather start with a fully functional unit before
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Old 08-17-2019, 03:30 PM   #34
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

so what - you hold both buttons and it uses the set temp as default?

i'm pretty sure mine holds the last setting until you change it again.
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Old 08-17-2019, 11:08 PM   #35
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

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so what - you hold both buttons and it uses the set temp as default?

i'm pretty sure mine holds the last setting until you change it again.
Yes correct, I hold 2 buttons and I have like 3 seconds to set a default temperature
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Old 08-18-2019, 08:19 AM   #36
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Default Re: [FAQ] Atten 858d problem S-E (or 5-E) or stuck in 498'C.

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Yes correct, I hold 2 buttons and I have like 3 seconds to set a default temperature

I do not like this as a setup however wrote this software what were they thinking about when did this

Unless this is done keep you from changing the temperature by accident
Which might not be a bad idea this is ? mark
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