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Released December 3, 1994 in Japan and September 9, 1995 in North America. Models SCPH-100x, SCPH-3000, SCPH-3500, SCPH-500x, SCPH-550x, SCPH-700x, SCPH-750x, and SCPH-900x.

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Faulty Power Supply Board AND controller interface suddenly faulty.

As the title states, my SCPH-5501's PSU board and controller interface went vamoose.

The power supply was faulted when I was attempting to diagnose a possible power output failure and my meter probe slipped, shorting pins 7 and 8 on IC101 while power was still being applied to the board. I know, stupid amateur mistake, especially for a professional like myself to make. Anyway, after trying everything I could to fix it, I came to the conclusion that something needs replacing. I checked the output connectors, and the highest voltage I measured was between pins 5 and 4, 3, 2 at approximately 2.15 Volts. The LED does not power on. I have a replacement ready for IC101 (Part no. UC3842AN, which matches the KA3842B that occupies the board), but after measuring the continuity of C110 (Which links pin 8 of IC101 with J2, D109, C108, PC101, and pin 2 of itself), I discovered that C110 was a dead short. Could this be the issue, or is it the IC as well? If the capacitor is not supposed to be shorted, I'll need to replace it with an equivalent rated ceramic THT capacitor (since I don't have any surface mount ceramics). Ratings of the capacitor would be great. I also want to make sure I didn't miss any component links that might affect the power supply negatively if not corrected.

As for the controller interface, the controller suddenly wouldn't function. Since the power supply is inoperative, I'm unable to do live board testing and voltage measuring. Chasing the traces, I came across PS605, which if I'm not mistaken is an inductor. Using the continuity checker on my meter, I probed all of the other inductors and similar PSXXX components and read them as shorted, as expected since most inductors have little to no resistance. However, PS605 did not have a short, or even any measurable resistance. I'm confident that this is the issue, since close inspection of the connections, joints, and other components showed no faults. However, I want to make sure that there is nothing I may have overlooked, and I also need to know the ratings of this component for replacement.

Remember: The model is SCPH-5501 (FAT, not slim). I don't want answers for any other model (such as the SCPH-100, 10XX, Slim models, ect.) because that information would be useless to me. Thank you.

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Fixed it! Sony sent me a copy of the official SCPH-550X series service manual, and from there I was able to get the surface mount components replaced. C110 was a 1nF 50V ceramic, and turns out the dead short was from the IC, not the capacitor. I replaced both anyway. The controller port inductor (PS605) was indeed burnt out, so I replaced it with a Wurth Elektronik 1.5 mH surface-mount inductor. Now my PS1 works beautifully!

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Sterling Ordes sarà eternamente grato.
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