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DEADLY WIRING FAULT ; Atten 858D+ Hot Air Rework Station

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saturation:
ouch, yes, dr_p, you have a new set of unique faults to contribute; just again supporting a big issue is variations within their assembly quality.  If you have the time, photos of these issues would help to add to the discussion and archives for future readers.



--- Quote from: dr_p on December 05, 2012, 08:38:30 am ---I have one of these Atten 858D on it's way from Hong Kong. I was planning on a teardown to check for issues, even whithout knowing of this topic. Now that I read it it's definitely getting a thorough inspection.

Nicest surprise from the chinese QC was a extension cord that had "one of the other wires"  :-DD  and ground swithed over. Since I live in Europe, our plugs don't care for polarity. First time I plugged it in it worked fine because the neutral went to ground and vice-versa, which it did anyway in the panel board(no RCD). Second time I plugged it the other way around and got hot on the chassis ground.  |O As a bonus the equipment that's plugged in was not working, so it begged for me to touch it.  :-/O

I then realized there's a problem, opened the extension cord and checked for continuity, since the colors were right (yellow/green to ground) and found out that they were switched over insinde the moulded plug. It wasn't my cord to throw away, so I text labeled them and soldered them the correct way.

--- End quote ---

uhmgawa:

--- Quote from: Monkeh on December 02, 2012, 07:36:20 pm ---
--- Quote from: uhmgawa on December 02, 2012, 07:31:20 pm ---Is the market demand really so biased to this line voltage

--- End quote ---

Well, yes. The exceptions to 240VAC 50Hz consist of: The USA, Canada, Japan, and various South American countries.

--- End quote ---

I believe a few countries, notably Taiwan and Mexico have been omitted from the above roster.


--- Quote ---The entire planet uses 240V 50Hz with the exception of those under the thumb of the US.

--- End quote ---

We like it that way -- keeps out the riffraff.
However my question rather was of actual market sales volume vs.that of global outlet tally.

In any case it appears the 110V units have become more common though the 230V units still dominate.
In particular replacement heaters for this and cloned designs are less common and substantially more
expensive.  It is possible though to parallel fold a 220V element in mid stride with an iron wire and brass crimp
if need be.

Something I haven't seen discussed is the variation in nozzle mounting style.  It appears the
current majority of units have a bottom flanged bayonet style push & spanner turn configuration.
Less common seem to be a dimpled/deformed pin and groove bayonet, and lastly a conventional
22mm clamp nozzle.  I've even seen one vendor of the flanged bayonet offer what appears to be a
22mm clamp adapter.  Presumably to allow use of existing specialty nozzles using a 22mm clamp
mount.

uhmgawa:

--- Quote from: htassell on September 16, 2012, 11:43:51 am ---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.

--- End quote ---

Perhaps you have an early version of the wand where the brass screw boss inserts in the cable end hadn't been cost reduced out yet.
It also appears the reed switch may have an actual mount clip vs the dribbling of epoxy I'd found in a recent wep858 and xpower 8786d.
In both of these units the bare molded bosses into which the connection PCB screw mounts, were cracked.  I believe the thermoplastic
used is glass filled and more brittle than say unadorned ABS which has sufficient resilience to give when the screw self threads.

These hot air tools work remarkably well given their many shortcomings.  I'd go as far to say they may be one of the few original
(+/-) product designs I've seen appear from Chinese vendors.  I'm trying very hard to ignore the S3F9454 being socketed which
almost invites displacing it with a plugin uC board to address existing firmware quirks, add custom features, etc..

T4P:
Nope, those are the Yihua ones, i bought mine 2 years ago and it broke
The fan is pretty piss poor but the machine inserts are fantastic, though there's a LOT of restriction on the handle
the shape of the atten handles are a bit better but not as smooth as yihua

devhdc:
Seeing as I'm just getting into electronics, and ordered one of these for testing out some minor reballing, I'd truly appreciate a detailed breakdown of what could conceivably be fixed .. And better yet, a video detailing potential errors, and documenting the work to fix it.

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