| Electronics > Repair |
| Looking for Mettler Scale ROM backup |
| << < (8/11) > >> |
| gmac34:
nothing happens if I remove the communication board, I think it was an optional anyway, and I get error 4 ( Error in temperature measurement) with the cell disconnected. |
| jamarjan:
Thanks for checking and the information provided Unfortunately my efforts are still without progress I also checked the proper operation of the optotransistor controlled by the integrated switch Everything seems to work ok When switched on the scale consumes about 9W of power Under thermal imaging nothing heats up above the expected level I'm trying to analyze what could have gone wrong due to badly filtered / unstable power supply voltage but without a schematic my skills are already exhausted I guess I have to hunt for a twin used scale |
| dustooff:
maybe there are some mainboards available somewhere, https://www.ebay.com/itm/134203907609 |
| gmac34:
Is there any activity on pin 9 of the microcontroller (reset)? |
| gmac34:
Non having a schematics is bummer, but one last thing that comes to mind is to check the IC1, the PC74HC373P. but I don't fully understand what is it doing there, by the position it would seem like it would interface between the ROM and the micro. |
| Navigation |
| Message Index |
| Next page |
| Previous page |