Turbo Duo AC Adapter HES-ACA-05

[rag-time4]

Tried to power up teh Duo after many years of disuse and not getting any power output from the AC Adapter. Opening it up, the fuse is blown. The coil smells like it may be cooked, but I was wondering if anyone could test a good one and give me the ohms reading between the plug prongs. Mine reads 36.7 ohms.

The four diodes appear healthy but give inconsistent readings.
D1 2.88 Mohms
D2 2.62 Mohms
D3 2.99 Mohms
D4 2.94 Mohms

[NightWolve]

Eric!? No way, and your account logged in fine without help! Wow, welcome back! ; )

Sorry to say it's pretty much a skeleton crew here (namely me). 

Hm, as to your problem, I still have my original Turbo Duo PSU, I'll see if I can find it for you later. I bought a modern one with internal regulation from Bernie since the OG is just a dry transformer, 4 diodes and a smoothing capacitor. I figured it's better for internal voltage regulators if the exact needed voltage is coming in.

But yeah, I think I can actually help you with this one.

[rag-time4]

Eric!? No way, and your account logged in fine without help! Wow, welcome back! ; )

Sorry to say it's pretty much a skeleton crew here (namely me). 

Hm, as to your problem, I still have my original Turbo Duo PSU, I'll see if I can find it for you later. I bought a modern one with internal regulation from Bernie since the OG is just a dry transformer, 4 diodes and a smoothing capacitor. I figured it's better for internal voltage regulators if the exact needed voltage is coming in.

But yeah, I think I can actually help you with this one.

Doing my part to drive traffic!!

Curious the resistance you get. Seems mine is very high for a transformer coil but who knows.

I've got a replacement cap and fuses on the way.

[NightWolve]

Mine reads 36.7 ohms.

Yep, checks out!

[rag-time4]

Mine reads 36.7 ohms.

Yep, checks out!

Thanks a ton for checking!

If the new fuse and cap don't solve the problem it sounds like the Duo itself will have to be sent out for repair.

[NightWolve]

The Duo has a fuse near the power switch, hopefully that didn't blow too. I dunno if you opened up the unit yet, but yeah first things first if there isn't even power.

I dunno, I think the only reason to keep my US Turbo Duo is for localization testing with real NEC hardware. For actual playing I'd rather do so on my LG OLED with an Analogue Duo via a digital connection. I don't care about CRT/RGB anymore, not for a long time anyway.

[rag-time4]

I replaced the fuse and big capacitor inside the AC adapter, and tested the AC adapter before connecting it. The label says it's supposed to have 10 Volts DC, but I had 12.84 Volts DC.

I sent a message to Thesteve and he thought it should be fine. Perhaps it drops a bit under load.

Duo powered on fine after repairing the AC adapter! Played Ys 1 and Super Star Soldier for the first time in over 15 years!!

  

On the subject of screens: I am playing on a flat Panasonic CRT via composite. Tv is a 2000s model with component jacks as well as composite. I still prefer CRT... maybe being a competitive Street Fighter II player makes me extra sensitive to input delay.

I recently upgraded our 60" LED tv to a 50" plasma from the 2000s for our xbox 360, ps3, and wii. It's much more responsive to play on, and much more enjoyable. Also the older tvs have more sets of input jacks

[NightWolve]

Yeah, it's a retro unregulated dry transformer with just 4 diodes for DC conversion and a smoothing capacitor, so how high a voltage you get depends on your incoming AC power which isn't exactly 120VAC, mine hovers at 126.

Only a modern, regulated PSU would give you 10VDC exactly. The retro PSUs are linear and depend entirely on the length of the coil to achieve a voltage drop! This one probably expected 110VAC like Japan, but in the end the internal regulators can handle 6-35VDC, so it doesn't matter so much.

Anyway, congrats on the repair!