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DEADLY WIRING FAULT ; Atten 858D+ Hot Air Rework Station
htassell:
Reading this thread made me remeber that I picked one of these rework stations up a year or so ago for $60 delivered via AliExpress. I haven't had the need to use it as I bought a JBC system instead, but I thought I'd pull it out and have a look.
Unsurprisingly, it also features some of the issues reported in this thread. Overall however, once these problems were rectified, the station performs quite well. Really well actually, when you consider the fact that it is 1/15th the cost of the JBC station I purchased.
My specific unit is a Saike 898D, but is functionally identical to the Atten stations discussed here with a Hakko 900 style soldering iron added into the mix.
Here's a view of the front panel PCB - typical mess with power and signal wires bunched together.
You can also see the earth post in the lower right of the image. The yellow wire is from the transformer chassis ground, the thin green wire is from the metal shroud of the hot air hand piece.
There is another similar earth post at the upper left of the photo hidden behind the bundle of wires. This one is again joined to transformer chassis ground and the front panel, and also earths the exposed metal of the soldering iron.
This image shows the station with the rear panel removed. It also shows the major problems with this station. Firstly, there is no strain relief on the mains inlet cord. There is just a dab of glue and the grommet holding it there.
You can also see that the earth wire from the mains lead is in fact not connected to anything at all. It has been stripped and tinned, so obviously there was the intention to solder it to the earthing tab that you can see in the background on the bolt fastening the transformer to the case, but it must have been missed.
Finally, it is also obvious to see that the fuse is connected to the neutral rather than active.
In terms of the hot air wand, there are no signs of grinding or hacking of the fan enclosure to make it fit. Likewise all wires are well attached to the PCB with no large stretches of bare copper exposed or anything like that seen in other stations.
So after strain relief was fitted to the mains cable, the mains earth wire re-attached, and the active and neutral swapped around plus a bit of tidying up and re-bundling of wires, the station was good to go.
It actually works really quite well and I'm happy with it, certainly for the $60 delivered I paid for it. Having a second unit is handy because I can have it set for lead free temperature, while my main JBC station is set for 60/40 which I work with most.
Cheers,
Hugh
T4P:
I think you should reverse their roles ;D
Leave the lead-free for the JBC, because lead-free requires a little more power on the 936 but hey, if you hardly ever work with lead-free it doesn't matter
Anyway, be careful with using it in environments warmer than 28C, my Yihua (who seems to be the OEM for Saike) 858D failed in short order after a month or rather combined usage of a few hours overheated the triac... in 35C environments
htassell:
Thanks for the heads-up. I imagine I'll rarely use it, just occasionally when I'm fixing something I haven't made.
I'm in Tassie, so the average temp down here would be something like 19 degrees or so :)
GEuser:
htassell , that hot gun is nearly exactly the same in my new YiHua 853d , see on the pcb board a YH !, the only slight difference is the colour of wires to the heater , i think (its all back together) there were 2 clear wires but i cannot remember if they were from the sensor or reed switch now , but a carbon copy and works well for the cost ...
T4P:
--- Quote from: GEuser on September 16, 2012, 01:15:51 pm ---htassell , that hot gun is nearly exactly the same in my new YiHua 853d , see on the pcb board a YH !, the only slight difference is the colour of wires to the heater , i think (its all back together) there were 2 clear wires but i cannot remember if they were from the sensor or reed switch now , but a carbon copy and works well for the cost ...
--- End quote ---
Well ... Yihua is known as a OEM actually
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