| Electronics > Repair |
| Weller WD1 Discussion and Repair |
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| Miwer:
Hi, So I just want to share my repair experience on a WD2M. It had a problem where irons connected to channel 1 would have thermal runaway, and get glowing red. I could see the thermal regulation was working (somewhat), because when I set it to a low temperature (say 150*C), the iron would still get so hot that it melted the solder, but eventually settle, and it would throttle the heater to maintain the (too high) temperature, thinking it was only 150*C. Channel 2 did not show this issue and was fine. After disassembling the unit and scoping the thermocouple signal from channel 1 and the op-amp output associated with that channel, I could NOT reproduce the problem. I reassembled the unit, and the problem would show again. So I found out there was a lose connection between the power pcb and display pcb, which caused messed up thermocouple readings on channel 1. I went over the connectors with a soldering iron, but that did not solve the problem. Wiggling the ribbon cable would still show the issue. Finally I disassembled the connectors on both ends of the ribbon cable, and simply replaced it with a new piece of ribbon cable, pressing on the same connectors on both ends, and that finally solved the issue. So to anyone else having unstable temperature issues on these Weller stations: Check the ribbon cable ;) I also managed to readout the PIC18F6622 chip, so it's attached here in case anyone needs it. Also made nice pic showing the programming connections on this model. Have a nice day. |
| stenzer:
Hi everyone, I was able to establish a remote communication with my (non-M) WD1, see attached pictures. There is no dedicated firmware needed. It seems the WD Monitor software is created to be used with a certain USB to UART IC. I suspect this is caused by the NI-VISA Run Time Support/Lab-View realization, which is installed with the WD Monitor software. I was able to establish the communication with a cheap CP2102 board, ordered on Aliexpress. As I'm more active at an other Forum, please have a look at https://www.edaboard.com/threads/weller-wd1-m-display-repair-replacement.396863/ for further details. I hope this findings will help some of you, to use their WD1 at least with a PC when the display is already blind. BR |
| stenzer:
Hi, here is also the firmware dumped from my WD1. There is also a picture attached showing the label on the backside of the display board, in case the firmware includes some production year/model related calibration values. BR |
| BinaryBits:
Sorry for posting in such an old thread, but does anybody have the firmware for the WD1M station? There have been firmware uploaded in this thread for most of the other WD stations except the 1M. So if somebody has it I would really appreciate if you could upload it here. Thanks. |
| ascom:
--- Quote from: Danielw on May 07, 2014, 03:13:35 pm ---Glad I found this! Thanks for the schematics I installed a led mod like this one : http://www.eevblog.com/2012/02/03/eevblog-242-hakko-fx-888-soldering-iron-hack/ I just connected a led in series with a resistor between GND and Triac_ch1 ( I think it was, just probed around to find a good spot to solder near the connector) Now I wont forget the damn thing turned on for a couple of days in a row! :) --- End quote --- Do you have any photos where you exactly soldered ground and positive of LED? If i not wrong, on the Triac_ch1 is AC power. |
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