Search found 5 matches

by redglyph
Fri Apr 26, 2019 8:22 pm
Forum: Hardware issues
Topic: Improved Keyboard????
Replies: 22
Views: 4259

Re: Improved Keyboard????

However, I personally got the second DM42 which has less switch problems, but still has. According to the S/N, there are 164 units between the first and second one. I must guess this is a serious problem over a lot of units (or I have the fortune of negative "lucky punch"). I really hope Michael ca...
by redglyph
Sat Mar 02, 2019 8:29 am
Forum: Hardware issues
Topic: Improved Keyboard????
Replies: 22
Views: 4259

Re: Improved Keyboard????

The problem has been identified. It seems the metal sheets from which the metal domes were stamped weren't cleaned properly. An oil film prevents reliable contact. The domes and the contact area on the PCB can be cleaned, which significantly improves the reliability. We encourage anybody having suc...
by redglyph
Sat Mar 02, 2019 8:26 am
Forum: Usage tips, tricks and problem reports
Topic: Updating the firmware
Replies: 0
Views: 760

Updating the firmware

A few problems I saw when updating the firmware, for information. 1) Somehow the firmware link has been put on another page than the "firmware" page of the website, a bit confusing. 2) The "Firmware Update" link to the manual on the separate DM42 page (https://www.swissmicros.com/dm42/firmware/) is ...
by redglyph
Sat Mar 02, 2019 8:04 am
Forum: Hardware issues
Topic: USB connectors
Replies: 6
Views: 2415

Re: USB connectors

On the USB specifications the power pins in the connector should be slightly longer than the data pins so it's possible to connect to charge and not connect the data pins Thanks! That would explain it, however when it happened it was confusing. Even more so because I had previously connected it wit...
by redglyph
Tue Jan 08, 2019 2:22 pm
Forum: Hardware issues
Topic: USB connectors
Replies: 6
Views: 2415

Re: USB connectors

Thanks! I realized after spending a lot of time with the driver that it was the problem, and reached the same conclusion: I tried by opening the case to get a proper connection and it worked. Without that, I get the icon on the calculator telling me it's connected to an USB power source , but still ...