General > General Technical Chat
DEADLY WIRING FAULT ; Atten 858D+ Hot Air Rework Station
T4P:
--- Quote from: amyk on September 15, 2012, 11:08:40 am ---
--- Quote from: T4P on September 15, 2012, 04:51:19 am ---If you see dull solder joints it's definitely bad joints, i have never seen a china brand product with lead-free
Fused on the wrong leg? That's what they do to save money, >:(
--- End quote ---
When was the last time you bought electronics from China? They've been lead-free for years (RoHS), and leaded solder is becoming more expensive.
--- End quote ---
'
RoHS my ass ... walk into the SEG and tell me if you come back with lead-free products. Want me to show it? I bought a couple of things from the SEG (which all dont work anymore properly) and the solder they use easily melt at 250C (Still bad solder but definitely not lead-free) with a 936
At least when it comes to Yihua and Atten and BEST i used them all i know what it is.
saturation:
Just a side comment. 250C? Pb solder is 60-40 Sn/Pb or the eutectic mix all tend to melt under 200C, near 185C. Most lead free solder in electronics tends to melt higher, over 210C and up. Also one assume your station is properly calibrated to use melting point to estimate the alloy. If it melts towards the low end, it suggests leaded solder, over 220C is more suggestive its lead free.
--- Quote from: T4P on September 15, 2012, 01:17:34 pm ---RoHS my ass ... walk into the SEG and tell me if you come back with lead-free products. Want me to show it? I bought a couple of things from the SEG (which all dont work anymore properly) and the solder they use easily melt at 250C (Still bad solder but definitely not lead-free) with a 936
At least when it comes to Yihua and Atten and BEST i used them all i know what it is.
--- End quote ---
T4P:
NOTE : 250C points to bad solder. Instant melting
Lead-free solder that easily melts at 220C is either pointed to two things : Well wetted tip and a station with lots of thermal horsepower metcal/jbc/fx-951/QK202D
You seriously expect good solder to come out of china? No way. The only lead-free chinese board i met required me to turn up to 380C
arekm:
btw. QK202D is rebranded Quick 202D from China (http://www.quickchina.com.cn/product/2006-8-23/200682380334.html).
T4P:
I know. In fact the first thing i knew about the QK202D is that it's made by Quick and they don't do model rebrands. QK stands for QUICK
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