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Thanks :)
Restoring a Wyse WY-120 Amber Terminal
Restoring a Wyse WY-120 Amber Terminal
Hey guys,
Not sure why I enjoy doing this kind of thing so much... but whatever, I managed to score a WY-120 Amber phosphor terminal and am doing a full restoration. Tear down, full clean of components, pcb, casing, crt, replace capacitors & transistors.
My plan is to use it for various things... connecting to Atari diagnostics, also attaching a Raspberry Pi to it via serial & using it as it's own terminal system & also having the ability to SSH into my various machines.
Here are some photos of the process so far. I've ordered & replaced the old tired transistors with fresh NOS ones, I've also written down and ordered all the capacitors but I'm still waiting for them to arrive. The casing has had a good clean too.
FYI I *have* researched lots of safety videos on CRT discharging etc & am taking all precautions. First time I've worked on a CRT so I'm taking it slow.
Edit: added some maintenance documents I found, for preservation.
Not sure why I enjoy doing this kind of thing so much... but whatever, I managed to score a WY-120 Amber phosphor terminal and am doing a full restoration. Tear down, full clean of components, pcb, casing, crt, replace capacitors & transistors.
My plan is to use it for various things... connecting to Atari diagnostics, also attaching a Raspberry Pi to it via serial & using it as it's own terminal system & also having the ability to SSH into my various machines.
Here are some photos of the process so far. I've ordered & replaced the old tired transistors with fresh NOS ones, I've also written down and ordered all the capacitors but I'm still waiting for them to arrive. The casing has had a good clean too.
FYI I *have* researched lots of safety videos on CRT discharging etc & am taking all precautions. First time I've worked on a CRT so I'm taking it slow.
Edit: added some maintenance documents I found, for preservation.
- Cosmic Puppet
- Posts: 1734
- Joined: Fri Aug 02, 2019 1:03 am
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Re: Restoring a Wyse WY-120 Amber Terminal
I saw an amber monitor in a repair video recently. They look really nice!
US Atari 520 STFM (C070523-001 REV.D1) , Exxos PSU, 4MB Marpet Upgrade, Exxos 6 Chip TOS 1.04 USA, EmuTOS 1.0.1, Ultrasatan, PP Driver, Original Floppy Disk Drive, NEC Multisync EA193Mi Monitor, Star LC-10c Printer, iMP C100110-001 DMA.
https://thecosmicpuppets.bandcamp.com/releases My released music so far...
https://thecosmicpuppets.bandcamp.com/releases My released music so far...
Re: Restoring a Wyse WY-120 Amber Terminal
Always handy having a real serial terminal around. They just work.
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Cheshire Noir
- Posts: 40
- Joined: Sat May 25, 2019 5:24 am
Re: Restoring a Wyse WY-120 Amber Terminal
Sorry to necro this thread but...
How on earth did you get the top cover off your WY-120? The instructions say to "slap" the case on either side. We tried that with enough force that we were both concerned we'd shatter the 32 year old plastics.
I'm going to try a "mac cracker" next but if you have any suggestions, I'd love to hear them...
Cheers!
Chesh
How on earth did you get the top cover off your WY-120? The instructions say to "slap" the case on either side. We tried that with enough force that we were both concerned we'd shatter the 32 year old plastics.
I'm going to try a "mac cracker" next but if you have any suggestions, I'd love to hear them...
Cheers!
Chesh
- HigashiJun
- Posts: 2390
- Joined: Fri Jun 19, 2020 7:21 am
- Location: Tokyo
Re: Restoring a Wyse WY-120 Amber Terminal
Definitely not a "wise" solution...Cheshire Noir wrote: Thu Mar 12, 2026 7:34 am The instructions say to "slap" the case on either side.
Re: Restoring a Wyse WY-120 Amber Terminal
I can't remember very well, but I think it's mainly about getting the tabs on the very top released. Perhaps just put some pressure around the tab area.
- rubber_jonnie
- Site Admin

- Posts: 15070
- Joined: Thu Aug 17, 2017 7:40 pm
- Location: Essex
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Re: Restoring a Wyse WY-120 Amber Terminal
Aside from being a bit dusty, it seems quite clean and not sooty like some high hours devices. Any idea what the phosphor is like, any evidence of burn in?
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
Re: Restoring a Wyse WY-120 Amber Terminal
It had only the faintest burn in from memory... but fyi this is a necro post, not something I'm currently working on.
- rubber_jonnie
- Site Admin

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Re: Restoring a Wyse WY-120 Amber Terminal
Lol I didn't notice, but necro threads do have a habit of coming back to lifeSteve wrote: Thu Mar 12, 2026 10:07 am It had only the faintest burn in from memory... but fyi this is a necro post, not something I'm currently working on.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
-
Cheshire Noir
- Posts: 40
- Joined: Sat May 25, 2019 5:24 am
Re: Restoring a Wyse WY-120 Amber Terminal
Thanks Steve. Much appreciated.
I'll go at the front clips with some plastic spudgers and see how we go.
Cheers!
Chesh
I'll go at the front clips with some plastic spudgers and see how we go.
Cheers!
Chesh
