- Bipolar PROM replacement? - 1 Update
- HP Envy 4500 print cartridge error - 2 Updates
- will solder stick to the outside of BNC connector? - 7 Updates
| John Crane <john_crane_59@yahoo.com>: Jul 07 11:50PM -0500 On 7/6/21 1:36 AM, Sergey Kubushyn wrote: > * KSI@home KOI8 Net < > The impossible we do immediately. * > * Las Vegas NV, USA < > Miracles require 24-hour notice. * > ****************************************************************** Yes it is running code in the PROM. That's the Monitor program for the computer. -J |
| bitrex <user@example.net>: Jul 07 03:13PM -0400 Bought a black 901 cartridge for the above printer as usual, on install immediately got the message: "Print cartridge problem: (black) Refer to device documentation to troubleshoot." Strangely it now throws the message if I try to re-install the previous cartridge that was running low, too, it was working fine minutes before other than the usual symptoms of spotty printing due to low ink... Tried re-seating both cartridges a number of times, pulling the power and resetting, cleaning the contacts on both cartridge and cartridge slot with isopropyl, no effect. With no color cartridge installed it seems impossible to access anything in the menu, too. Anything else to try before I bin it? Thanks |
| Jeff Liebermann <jeffl@cruzio.com>: Jul 07 09:17PM -0700 >slot with isopropyl, no effect. With no color cartridge installed it >seems impossible to access anything in the menu, too. >Anything else to try before I bin it? Thanks The office next door to my former office went through 3 or 4 of those printers. They all died with a similar problem that was probably caused by replacing the print cartridge while the printer power was turned on. Notice how close the contact pads are on the cartridge: <https://inkdaddy.wordpress.com/2010/07/18/review-inside-cracked-open-the-hp-901-httph10060-www1-hp-compageyielden-019searchresults-htmlccodeusstcartridgesscc653a-black-inkjet-print-cartridge/> <https://inkdaddy.files.wordpress.com/2010/07/hp-901-contacts.jpg> It doesn't take much to short the contacts. I couldn't determine if it was the printer, the cartridge, or both that died. Anyway, wipe the cartridge and the matching contacts on the carriage with a wet cloth until all the ink splotches have been cleaned and try again. If that doesn't work, give up. If that fixes it, read the entire article and then decide if you want to continue dealing with this abomination. -- Jeff Liebermann jeffl@cruzio.com PO Box 272 http://www.LearnByDestroying.com Ben Lomond CA 95005-0272 Skype: JeffLiebermann AE6KS 831-336-2558 |
| Jeff Liebermann <jeffl@cruzio.com>: Jul 07 10:05AM -0700 >In other words, I don't have the nut, lock washer or solder lug. Is it >possible for solder to stick to the outside of the BNC, like the >threads, etc? I suspect your connector looks more like this: <https://www.digikey.com/en/products/detail/amphenol-rf-division/31-221-RFX/100648> Yes, you can solder to the threads in order to get a ground connection. Most are silve or nickel plated. However, you might run into a bright chrome plated abomination that can't be soldered. Scraping it off won't work because the underlying metal is probably zinc instead of the more common brass. You mentioned that the insulator is Teflon, which is the mark of a quality connector, so I don't think you'll have the bright chome plating problem. It will take a large chisel tip and preferably a temperature controlled iron to do a decent job of soldering. Try cleaning the threads with a brass wire brush and using some activated flux. I'm partial to 63/37 lead/tin, but the Rohs stuff will work at a slightly higher temperature. <https://www.ebay.com/itm/224041048219?epid=10046829860> Seems a bit expensive. If you need a few nuts, I have a fairly large collection. Sorry, no lock washers or lugs. I just hate thinking about you ruining a perfectly good BNC panel jack. Email to address below. -- Jeff Liebermann jeffl@cruzio.com PO Box 272 http://www.LearnByDestroying.com Ben Lomond CA 95005-0272 Skype: JeffLiebermann AE6KS 831-336-2558 |
| Jeff Liebermann <jeffl@cruzio.com>: Jul 07 10:12AM -0700 On Wed, 07 Jul 2021 10:05:05 -0700, Jeff Liebermann <jeffl@cruzio.com> wrote: ><https://www.digikey.com/en/products/detail/amphenol-rf-division/31-221-RFX/100648> >Yes, you can solder to the threads in order to get a ground >connection. Most are silver or nickel plated. Correction. You can solder to nickel plating but only if you first remove the oxide layer with some acid flux and apply more heat: <https://forum.caswellplating.com/forum/other-metal-finishing-questions/10134-soldering-to-nickel-plated-connectors> Be sure to clean/wash off the acid flux from the connector and wire when done. -- Jeff Liebermann jeffl@cruzio.com PO Box 272 http://www.LearnByDestroying.com Ben Lomond CA 95005-0272 Skype: JeffLiebermann AE6KS 831-336-2558 |
| bilou <bilou@sfr.fr>: Jul 07 07:13PM +0200 On 06/07/2021 23:06, Ruk wrote: > possible for solder to stick to the outside of the BNC, like the > threads, etc? > Thank you. It seems to me that the connector of your link is the insulated ground kind.Those were mainly used for coaxial Ethernet. On a normal one with PTFE insulation it is possible to solder. In a cheap Chinese TAP and DIE set I found one that was perfect. Very handy to replace F type connectors on SAT devices. |
| HW <none@no.no>: Jul 07 07:20PM +0200 >Teflon so no melting. Be careful with PTFE and heat. It will start degrading at around 235 C, and will give off some nasty gases while doing so. |
| Ruk <rthekeeper@zed.net>: Jul 07 01:43PM -0400 On 7/7/21 1:20 PM, HW wrote: >> Teflon so no melting. > Be careful with PTFE and heat. It will start degrading at around 235 > C, and will give off some nasty gases while doing so. No problem. It was all done outdoors with the wind blowing everything away from me. |
| Ruk <rthekeeper@zed.net>: Jul 07 01:48PM -0400 On 7/7/21 1:05 PM, Jeff Liebermann wrote: > collection. Sorry, no lock washers or lugs. I just hate thinking > about you ruining a perfectly good BNC panel jack. Email to address > below. All four were soldered yesterday. Outdoors. I used a 60 watt iron. I initially tried a 230 watt gun, but I can never seem to get those to apply heat where it should be. I didn't solder the entire connector, just a couple of spots, more like a "spot solder". In retrospect, I probably should have used some steel wool around the threads first and some flux. However, although it took quite a while to get the solder to stick, the job was done. If the chassis had been something other than tin and much thicker, I'd have simply drilled and tapped holes. |
| Jeff Liebermann <jeffl@cruzio.com>: Jul 07 11:35AM -0700 >initially tried a 230 watt gun, but I can never seem to get those to >apply heat where it should be. I didn't solder the entire connector, >just a couple of spots, more like a "spot solder". The problem with a soldering gun is that while it burns many more watts than a pencil style iron, the tip is rather small or rather less massive. What happens is the small gun tip will get hot enough to melt solder, but as soon as it touches something big, the BNC connector sucks away all the heat and the tip temperature soon drops below the point where it will melt solder. That's why I suggested a more massive tip and a temperature controlled iron. I'm really surprised that you were able to solder anything outdoors with the wind blowing. I used to do radio tower climbing and ocassionally had to do soldering. My iron of choice was a big heavy copper tip heated by a plumbers propane torch. >In retrospect, I probably should have used some steel wool around the >threads first and some flux. Nope. Notice that I suggested using a brass wire brush. Steel wool likes to leave tiny piece of steel imbedded in the metal. They're almost invisible but will make their presence known after they begin to rust. >get the solder to stick, the job was done. If the chassis had been >something other than tin and much thicker, I'd have simply drilled and >tapped holes. You'll need a 3/8-32 tap wrench. <https://www.ebay.com/sch/i.html?_nkw=3%2F8-32+tap> -- Jeff Liebermann jeffl@cruzio.com PO Box 272 http://www.LearnByDestroying.com Ben Lomond CA 95005-0272 Skype: JeffLiebermann AE6KS 831-336-2558 |
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