Using a NOP Generator to help fix a dead 1541C drive (Bonus Track 1 Sensor demo)

Time for another Commodore 1541 disk drive repair. This time it's a 1541C, the last large 1541 drive made. This drive sports the Newtronics mechanism with Track 1 (aka Track 0) sensor which must be enabled to work. I use a NOP generator to help fix this drive and explain how these work.

--- Video Links

More information on the NOP generator for the 6502 and Z80 including how to make one:
   • 8 bit troubleshooting tools: The NOP ...  

8-Bit Guy's Commodore Disk Drive Video:
   • Commodore History Part 7 - Disk Drives  

C64C Repair and PAL Modification video:
   • Commodore 64c Repair and PAL Modifica...  

First Commodore 1541 Repair Video:
   • Fixing a Commodore 1541 Disk Drive  

ROM images:
http://unusedino.de/ec64/technical2.html

6502 Reset Vector Information:
https://www.pagetable.com/?p=410

Programming the 6502: (Book)
https://archive.org/details/Programmi...

1541C drive donated by Geek With Social Skills:
   / geekwithsocialskills  

--- Tools

Deoxit D5:
http://store.caig.com/s.nl/it.A/id.16...

Jonard Tools EX-2 Chip Extractor:
https://www.jonard.com/Products/EX-2-...

Wiha Chip Lifter:
https://www.wihatools.com/precision-c...

Elenco Electronics LP-560 Logic Probe:
https://www.amazon.com/Elenco-Electro...

Hakko FR301 Desoldering Iron:
https://www.amazon.com/American-HAKKO...

Rigol DS1054Z Four Channel Oscilloscope:
https://www.rigolna.com/products/digi...

Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
https://www.amazon.com/SE-Illuminated...

TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
https://www.aliexpress.com/item/33000...

TS100 Soldering Iron:
https://www.ebay.com/itm/TS100-65W-MI...

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

DSLogic Basic Logic Analyzer:
https://www.ebay.com/itm/USB-Logic-DS...

Magnetic Screw Holder: (also on eBay and Amazon)
https://www.harborfreight.com/4-inch-...

Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
https://www.ebay.com/itm/14-16-18-20-...

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

Plato (Clone) Side Cutters: (order five)
https://www.ebay.com/itm/1-2-5-10PCS-...

Heat Sinks:
https://www.aliexpress.com/item/32537...

Little squeezy bottles: (available elsewhere too)
https://www.amazon.com/Precision-Appl...

--- Links

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

Commodore Computer Club / Vancouver, WA – Portland, OR – PDX Commodore Users Group
https://www.commodorecomputerclub.com/

--- C64 Stuff

JaffyDOS:
http://blog.worldofjani.com/?p=3544

C64 Test Harness I use:
   • Building a Commodore 64 Diagnostic Te...  

C64 Homebrew cartridge PCB: (used for the DeadTest / Diag Cart I use)
https://www.ebay.com/itm/Commodore-64...

EasyFlash 3 Multi-Cart:
http://store.go4retro.com/easyflash-3/

--- Instructional videos

My video on damage-free chip removal:
   • How to remove chips without damaging ...  

--- Music

Intro music by:
Nathan Divino
@itsnathandivino

Outro Music:
Abyss by | e s c p | https://escp-music.bandcamp.com
Music promoted by https://www.free-stock-music.com
Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/...