Outboard power for IMB

[Marco Giustini]

I honestly doubt that USB is required - it's probably more a load thing being so high power. Though it's curious as I don't see any mention of that online. I see the HXi are designed to work "fanless" until a certain load, I don't mean to offend you - you are a smart guy - but you actually checked the voltages and not just looked at the fan, right?

OLDER power supplies - like 1980's ones - would not work without a load. The PSU inside classic Macintosh either doesn't start or starts but reading weird voltages at the outputs if with no load. As a friend told me, those power supplies worked with "hopes and prayers", SMPS were a new technology!

Yes, very OT, sorry

[Marcel Birgelen]

I did check the voltages, but I switched to an older style ATX PSU of which we still have a few around. USB is probably not required as it still claims to be ATX compatible, but I can imagine those "smarter PSUs" checking for actual load on the outputs before they start powering the peripherals. Those PSUs are from 2022/2023, so they probably conform to ATX 3.0. Maybe there is something in the standard.

I'm not sure about the PSUs inside the early Macs, but I remember an anecdote of Steve Wozniak bringing in some special guy of whom I forgot the name to design the PSU for the Apple II as Woz wasn't that good at analog designs, which I remember, was an early SMPS design.

[Marco Giustini]

Yes, that is a scene in "Jobs" where they hire a guy to make the Apple // power supply smaller. Even modern PSUs might require a little load on rails to work properly, sometimes it's in the spec sheet.

[Elia Orselli]

GDC says that "shelf life" and "rated life (reasonable usage)" of the internal (non rechargable) battery are the same: both 4.5 years in a good environment. GDC notes that "Life of the battery is very dependent on the environmental conditions. The storage life is calculated assuming climate-controlled storage conditions. In general, we do not recommend that IMBs are kept outside the projector for such long periods of time". However I assume that you can use a single dolby imb docking station to test periodically the SR1000s, but the most important thing is to check batteries voltage (via webpage or directly using terminals on the board) and schedule battery replacement accordingly. I have bought a GDC BRT-00 board with the temporary battery slot and test points and the procedure is quite simple and safe.

[Caleb Williams]

Can you link a model that has this feature? I've never heard of it. Are you sure you're not referring to RGB lighting? That would work via USB.

Edit: Ah cool, some VERY FANCY ones do. So unnecessary!

https://www.corsair.com/uk/en/p/psu/cp-9020259-uk/hx1000i-fully-modular-ultra-low-noise-platinum-atx-1000-watt-pc-power-supply-cp-9020259-uk

The USB connection to a pc supply is only used for statistics like temp, voltages, wattage output, and fan speed. This connection is not required to make the PSU work via the pin-bridging already mentioned. The UEFI of the motherboard does not care about that connection at all unless something is very wrong and it's shorting a usb power rail to ground.

[Hong Sung Hyeok]

Here is it

GDC says not to use them because they may break, but they do work.
The quality and durability of these adapters are generally poor, so you should never connect them to the IMB while the power is on.

I use this molex power adapter to store our spare IMB.
Naturally, it can't communicate with the projector, so when it turns on, it gives an SM error and can't play DCPs.
But I can also connect a spare PSD-3000 storage device to ingest content from upcoming shows.

I'd also recommend a case for storing the IMB.

https://ko.aliexpress.com/item/1005009094169325.html?spm=a2g0o.detail.pcDetailTopMoreOtherSeller.10.3a69Wvf7Wvf70O&gps-id=pcDetailTopMoreOtherSeller&scm=1007.40050.354490.0&scm_id=1007.40050.354490.0&scm-url=1007.40050.354490.0&pvid=d0483109-44b3-44a9-8446-a141366d3d5e&_t=gps-id:pcDetailTopMoreOtherSeller,scm-url:1007.40050.354490.0,pvid:d0483109-44b3-44a9-8446-a141366d3d5e,tpp_buckets:668%232846%238109%231935&pdp_ext_f=%7B%22order%22%3A%2215%22%2C%22eval%22%3A%221%22%2C%22sceneId%22%3A%2230050%22%2C%22fromPage%22%3A%22recommend%22%7D&pdp_npi=6%40dis%21USD%2123.34%2118.04%21%21%21161.16%21124.56%21%402140c1c317702720694115921eb36b%2112000047922537364%21rec%21KR%21%21ABXZ%211%210%21n_tag%3A-29910%3Bd%3A6fcf8b0b%3Bm03_new_user%3A-29895%3BpisId%3A5000000200544028&utparam-url=scene%3ApcDetailTopMoreOtherSeller%7Cquery_from%3A%7Cx_object_id%3A1005009094169325%7C_p_origin_prod%3A

[Shibu Paul]