I have just worked out how to dismantle the keycaps, although still wondering if cleaning them will actually help?
> -----Original Message----- > From: Rob Jarratt via cctalk <[email protected]> > Sent: 29 August 2022 11:26 > To: General Discussion: On-Topic and Off-Topic Posts > <[email protected]> > Cc: Rob Jarratt <[email protected]> > Subject: [cctalk] Advice on Repairing a HP1630G Logic Analyser > > I have a nice HP1630G logic analyser. It still works OK but has a number of > issues that I would like to fix. > > > > First, I managed to break the power switch. It became stiff and wouldn't > readily toggle the power. I think the shaft became bent. In pressing too hard, > I broke off the button on the end of the shaft. Looking at it, I think the > button may have been glued onto the end of the shaft, possibly in a previous > repair. There are some sites that list the button as available so I am trying to > source an original, but I think it could be just the button and not the shaft > that goes with it. However, if that proves impractical or too expensive, I am > wondering if it is possible to source a new switch, with a long shaft to reach > the switch on the board, that would at least allow me to toggle power from > the front panel? I am not sure what to search for though, any suggestions? I > have several possible workarounds: 1) just leave the switch on permanently > and "toggle" the power just by plugging into the mains > 2) try to glue the button back on, possibly with a metal pin for strength, but I > think there is a bend in the shaft that caused the action not to work well and > so this may not work well 3) Raid a spare from a HP1630D that I also have. 4) > try to make a new shaft and switch, possibly 3D printed, or just use a piece of > wooden dowelling. Any comments on these approaches? > > > > The other problem I have is that I get terrible switch bounce from the front > panel keyboard. I have removed the keyboard to see if I can get at the > switches and see if cleaning them would help. However, the keys (made by > Cherry) look like sealed units to me. Again, does anyone have any advice on > how to improve the performance of these switches? I could again raid my > HP1630D for a spare (which has a keyboard that isn't as bad), but would > rather not have to do so. > > > > Finally, I get a bit of screen wobble on the display. I am going to check all the > capacitors on the display board, but any other suggestions? > > > > Pictures of the broken switch and the keyboard are here: > https://1drv.ms/u/s!AgETuZFainX8gZNMqek10fyE3n1rlw?e=xd7RWU > > > > Regards > > > > Rob
