Commodore 128D (1571) disk drive repair (plus other minor faults) @iz8dwf

iz8dwf | Commodore 128D (1571) disk drive repair (plus other minor faults) @iz8dwf | Uploaded December 2017 | Updated October 2024, 1 hour ago.
Restoring an european Commodore 128D (s/n: DA407822). Internal disk drive was not able to read/write any disk. MOS 6581 SID needed to be replaced and the keyboard needed a good cleaning.
Also updated the 1571's firmware with the last available version to correct some minor bugs.

I do not recommend to alter any mechanical part of an old floppy disk drive unless you are sure about the real issue.

Mini how-to clean Commodore keyboards: youtube.com/watch?v=Sc3IhVU_Mdw

IZ8DWF gets mail! MOS8701 replacement and key test fixture from Hey Birt!

Quick repair of a Commodore 64 with a PLA fault

Apple IIgs disk interface issue. Substituting the IWM with a Macintosh one.

The longest Commodore PET 4032 repair ever, pt.1

Apple II europlus restoration and repair.

2 x C64 repair. One easy black screen case and a wrong approach

Commodore PET 2001 repair: dealing with MOS 6550/6540.

Making a vector monitor Pt. 4: Deflection yoke and driver issues.

Commodore PET 8032-SK repair. Making a new old school troubleshooting tool.

Gallag arcade (Galaga bootleg) #2 : Reverse engineering

$Yaesu FT-817 hamradio transceiver repair. Fuse and fused trace. This Yaesu FT-817 (S/N 21540153) wouldnt power on. The problem was due to a blown battery fuse and an interrupted trace on the 13V unswitched supply going to the Panel PCB. Yaesu FT-817 service manual: https://www.fracassi.net/iw2ntf/manuali/FT817_serv.pdf Timeline: 00:00 - Welcome 00:37 - Opening it and inspection 01:32 - Battery fuse 02:38 - The green wire ghost 06:38 - Bad capacitors 08:32 - Broken trace 10:44 - Testing buttons 12:00 - A 6m QSO$