zainka
Full Member level 2
I have Weller WD-2M which have stopped working, it does not heat on any of the two channels.
The irons have been confirmed working on an other device.
Basically all functions in user-interface seems to work, but whenever you try to turn on one channel, it turns back to OFF in the display after a few seconds
I found the WD-1 schematics and also the assembly layout for WD-2M, apparently, but the drawings looks a bit different than the boards in my WD-2M.
WD-2M Assy
https://www.manualslib.com/manual/1506523/Weller-Wd2m.html?page=20#manual
WD-1 Schematics & Assy drawings
https://www.eevblog.com/forum/repai...HPSESSID=4cn24i2phvov1g93bccbfd6ipa#msg293597
However, as mentioned, the WD-2M in my possession has a set of PCBs that looks different than the ones found in the WD-2M manual.
UserInterface PCB is marked cb28k-BS.
Connectors verified to be ok, no bad solderings or breaks.
Triacs measures as expectd
Optocouplers/Triacdrivers does however all measure 5V both on Anode and Cahode. This regardless of turning iron on or off or changing temperature., Have not scoped them, guess I have to.
Zero crossing circuit seems to work
I know that some people have had issues with the PIC breaking on the output pins controlling the triac-drivers, I might have to replace and reprogram it, but it is not confirmed to be broken.
Question) Do you know where to find the schematics for WD-2M
The irons have been confirmed working on an other device.
Basically all functions in user-interface seems to work, but whenever you try to turn on one channel, it turns back to OFF in the display after a few seconds
I found the WD-1 schematics and also the assembly layout for WD-2M, apparently, but the drawings looks a bit different than the boards in my WD-2M.
WD-2M Assy
https://www.manualslib.com/manual/1506523/Weller-Wd2m.html?page=20#manual
WD-1 Schematics & Assy drawings
https://www.eevblog.com/forum/repai...HPSESSID=4cn24i2phvov1g93bccbfd6ipa#msg293597
However, as mentioned, the WD-2M in my possession has a set of PCBs that looks different than the ones found in the WD-2M manual.
UserInterface PCB is marked cb28k-BS.
Connectors verified to be ok, no bad solderings or breaks.
Triacs measures as expectd
Optocouplers/Triacdrivers does however all measure 5V both on Anode and Cahode. This regardless of turning iron on or off or changing temperature., Have not scoped them, guess I have to.
Zero crossing circuit seems to work
I know that some people have had issues with the PIC breaking on the output pins controlling the triac-drivers, I might have to replace and reprogram it, but it is not confirmed to be broken.
Question) Do you know where to find the schematics for WD-2M