WIWA HD102 - naprawa

Niesprawna WIWA HD102 (https://commonemitter.blogspot.com/2014/04/wiwa-hd95-i-hd102-porownanie.html).
Objawy:

• (podobno) wcześniej wyłączał się po czasie
• częściej/później nie włącza się w ogóle
• migająca dioda sygnalizująca zasilanie
• ciche "cykanie" przetwornicy

Brak widocznych objawów uszkodzeń (przegrzanie, spuchnięty kondesator, wyciek z kondensatora).

Naprawa: wymiana kondensatora 47u/25V/105C po stronie pierwotnej przetwornicy (mały kondensator elektrolityczny na lewo od układu VIPer22A).

Magnetic PC case door

This is not a vanity modification - I've got this case for free but it was missing side door. In general I don't mind, but I've finally created replacement side door just to reduce dust collecting inside.

 I bought these 10 neodymium magnets (5x5x2mm) for under $1.

 This semi-sturdy, semi-transparent plastic sheet was cut out from light scattering panel from broken LCD TV - basically electronic waste. It was easy to shape by cutting lines with sharp knive and snapping it.

 Magnets are held with transparent two-component adhesive.

 6 magnets were quite enough to hold it, but as this plastic is little flimsy I've added two extra in the middle of longest edges.

Old PC hardware

Some PC hardware from late 80' and early 90'.

 Motherboard with soldered UMC 486SX 33MHz processor and socket for 487 coprocessor.

Multi I/O ISA card CT-6250.
NS8250 = "original" 8250 UART
MM58176 = real time clock
UCY7406 - Polish TTL - what is doing here?

FDC37C65 Super I/O chip

PAL16L8

HM6666 - based card, http://www.mks.purespace.de/technical/hm6666.htm

HM83450 + W86C451

Other variant of same card

W83757F + W83758P