After getting the #Commodore#C64 and #C128 running again, the next device to repair is the #C1571.
It had #corrosion and #rust on the main board and the power supply is beyond repairworthiness. I'd replace the latter with a #meanwell RD-35 with 5 and 12 volt output.
One #diode was rusty, a few traces needed #cleaning and five #resistor looked bad. Hope the black hybrid chip is still okay.
Sadly, the lower read head seems to be broken, my work might've been in vain. #floppydrive#retrocomputer
Here a comparison of the old #powersupply and the replacement.
I already cleaned the old board, removed two rusted diodes, and unsoldered the ICs, but there might be more defective components, that's why I decided to replace it with something completely different.
Still unsure if I'll leave the cable binders for keeping it in place. #commodore#c1571#retrocomputer#restoration#meanwell#psu
New video! In the second part of the series, I'm trying to resurrect the Apple Macintosh Performa 630 Power Supply I found to have lots of leaky capacitors in the previous episode.
The DC rails on this failed switching power supply from a wall wort AC adapter, were shorted together. It could be one of 4 components: 2 electrolytic capacitors, a surfacemount ceramic capacitor, or a surfacemount Schottky diode. Started desoldering each one and testing for the short. It cleared when the Schottky diode (SK26) was removed
The voltages on this side of the switch mode power supply are not expected to be much higher than 12V DC. This wall wort is rated at 600mA 7.2VA. The electrolytic caps are only rated up to 16V
I can't tell whether the new power supply helps.
8 outlets for 12 pedals - the gain pedals, the flanger, and the analog delay are daisy-chained. #guitar#pedalboard