Fixing a broken switch mode power supply (Lucas Deeco ST3220) @adriansdigitalbasement
Fixing a broken switch mode power supply (Lucas Deeco ST3220)  @adriansdigitalbasement
Uploaded April 2025 | Updated September 2026, 2 weeks ago
It's time to finish up the repairs on the Lucas Deeco terminal and see how it works as an actual terminal.

Part 1: youtu.be/WSnk5ZbrWAo
Part 2: This part!

-- Links

Manual:
archive.org/details/lucas-deeco-sealtouch-graphics-terminal-applications-manual

ROM descrambling and other info:
github.com/misterblack1/lucasdeeco

Planar Systems EL8358HR
eldisplays.com/content/EL8358HR.pdf

Photos and ROM dumps:
archive.org/details/lucas-deeco-seal-touch

Historical copy of Lucas Deeco's website:
web.archive.org/web/19980130115145/http://www.deeco.com

Patents:
patents.google.com/patent/US4812830A/en
patents.google.com/patent/US4893120A/en

Adrian's Digital Basement Merch store:
my-store-c82bd2-2.creator-spring.com

Adrian's Digital Basement ][ (Second Channel)
youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g

Support the channel on Patreon:
patreon.com/adriansdigitalbasement

My GitHub repository:
github.com/misterblack1?tab=repositories

-- Tools

Deoxit D5:
amzn.to/2VvOKy1
store.caig.com/s.nl/it.A/id.1602/.f

O-Ring Pick Set: (I use these to lift chips off boards)
amzn.to/3a9x54J

Elenco Electronics LP-560 Logic Probe:
amzn.to/2VrT5lW

Hakko FR301 Desoldering Iron:
amzn.to/2ye6xC0

Rigol DS1054Z Four Channel Oscilloscope:
rigolna.com/products/digital-oscilloscopes/1000z

Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
amzn.to/3adRbuy

TL866II Plus Chip Tester and EPROM Programmer: (The MiniPro)
amzn.to/2wG4tlP
aliexpress.com/item/33000308958.html

TS100 Soldering Iron:
amzn.to/2K36dJ5
ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853

EEVBlog 121GW Multimeter:
eevblog.com/product/121gw

DSLogic Basic Logic Analyzer:
amzn.to/2RDSDQw
ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672

Magnetic Screw Holder:
amzn.to/3b8LOhG
harborfreight.com/4-inch-magnetic-parts-tray-90566.html

Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971

RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
retrotink.com

Plato (Clone) Side Cutters: (Order Five)
ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184

Heat Sinks:
aliexpress.com/item/32537183709.html

Little squeezy bottles: (available elsewhere too)
amzn.to/3b8LOOI

--- Instructional videos

My video on chip removal without damage:
youtube.com/watch?v=XQVjwPsVFd8

--- Music

Intro music and other tracks by:
Nathan Divino
@itsnathandivino
Fixing a broken switch mode power supply (Lucas Deeco ST3220)The Pravetz 8D: An obscure clone of an Oric AtmosWe made some unbelievable discoveries about this Plexus P/20!Apple Lisa Part 7: The Lisa is cursed. It refuses to be fixed!Macintosh built in diagnostics: Emulate the Apple TechStep for freeIBM PC 5150 repair: The motherboard doesnt have the typical faultsThese touch screen terminals are built like absolute tanks (Lucas Deeco ST3220)Lava RSC: A great NES clone with RGB outputRepair of a very broken Mac SE/30 motherboardI tried to fix a cursed Nintendo Famicom. It broke me.Interfacing NES/SNES controllers directly to the Apple IIApple IIgs: A very satisfying repair
Adrians Digital Basement |

Fixing a broken switch mode power supply (Lucas Deeco ST3220)

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