To dose some sort of liquid from a pressurized can make a dispensing tool. It's as simple as getting an old business card, cut a 3/4" strip from it and fold it in half. Now spray the liquid into the V on the b-card and drip it into place. You get accurate application without the mess.
I believe that the technical name for that gooey substance is "shmoo". In my internet travels, I have heard of people spraying Deoxit into a small container, then using a toothpick or cotton swab to apply it to contacts, etc.
As always --thanks for posting Arti. I just received (yesterday) a TRS-80 Model 1 Level II with the lower case mod from an eBay auction. Some case damaged on the bottom shell and 2 broken off keys. Otherwise it seems to be intact. All the chips are on the board. It was sold as "untested." I haven't even plugged it in yet. I've got to dig out my other Model 1 for the power supply and monitor. I's highly likely that someone plugged power to the video port, but we'll see.
Hey Arti --I just broke out my other TRS-80 Model 1 and tested the new machine. The eBay auction clearly stated "PARTS/REPAIR, UNTESTED." I just powered it up and it works perfectly! 2 broken keys to fix and some broken plastic on the bottom. But otherwise it's running great. PS: i've been looking through boxes of 5.25" diskettes looking for hard-sector media. I've checked 8 boxes so far, no luck, but i'll keep looking.
> It's highly likely that someone plugged power to the video port, but we'll see. Oh, god, that really was one of the *dumbest* design decisions they ever made, wasn't it! 😠 Using the same 5-pin DIN connector for the power, video, and cassette ports, without even any kind of color-coding or obviously-visible markings for which one was which? I wonder how many fried Model I units Tandy's repair centers had to fix under warranty back in the day for that boneheaded move... Back in the day, Dad and I "borrowed" a couple of bottles of Mom's nail polish, and painted the power connector and socket bright red, and the video port pearl-white, so we wouldn't get them mixed up. 😀 (The cassette port, we left plain black.)
To dose some sort of liquid from a pressurized can make a dispensing tool. It's as simple as getting an old business card, cut a 3/4" strip from it and fold it in half. Now spray the liquid into the V on the b-card and drip it into place. You get accurate application without the mess.
I believe that the technical name for that gooey substance is "shmoo". In my internet travels, I have heard of people spraying Deoxit into a small container, then using a toothpick or cotton swab to apply it to contacts, etc.
Yet another video that I have watched and enjoyed that I can't tell anyone about unless they think I am weird 🙂.
Life is too short, watch the nerd videos proudly.
Deoxit is more than one product. I use an electronics cleaner (crc) and only use deoxit fader lube for potentiometers.
As always --thanks for posting Arti. I just received (yesterday) a TRS-80 Model 1 Level II with the lower case mod from an eBay auction. Some case damaged on the bottom shell and 2 broken off keys. Otherwise it seems to be intact. All the chips are on the board. It was sold as "untested." I haven't even plugged it in yet. I've got to dig out my other Model 1 for the power supply and monitor. I's highly likely that someone plugged power to the video port, but we'll see.
Hey Arti --I just broke out my other TRS-80 Model 1 and tested the new machine. The eBay auction clearly stated "PARTS/REPAIR, UNTESTED." I just powered it up and it works perfectly! 2 broken keys to fix and some broken plastic on the bottom. But otherwise it's running great. PS: i've been looking through boxes of 5.25" diskettes looking for hard-sector media. I've checked 8 boxes so far, no luck, but i'll keep looking.
> It's highly likely that someone plugged power to the video port, but we'll see.
Oh, god, that really was one of the *dumbest* design decisions they ever made, wasn't it! 😠 Using the same 5-pin DIN connector for the power, video, and cassette ports, without even any kind of color-coding or obviously-visible markings for which one was which? I wonder how many fried Model I units Tandy's repair centers had to fix under warranty back in the day for that boneheaded move...
Back in the day, Dad and I "borrowed" a couple of bottles of Mom's nail polish, and painted the power connector and socket bright red, and the video port pearl-white, so we wouldn't get them mixed up. 😀 (The cassette port, we left plain black.)
My suspicion is the gunk here is cigarette smoke residue. Particularly if the original owner of this machine was a heavy smoker.