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Joined: Apr 2017
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KMR Offline OP
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Hi,
Does anybody have a service manual for a Shimadzu SDU-450XL ultrasound unit (or specifically is there anyone who has experienced a 'Read Address Error' with this system).

Thanks,
Keith.

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Super Hero
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Welcome to the forum, Keith. smile

Unfortunately, this sounds like one of the "usual suspect" with ultrasound units ... namely, a "corrupt hard drive"* (the other one being "missing power supplies").

The remedy employed by the experts often seems to be a (more or less complete) software re-install.**

So; two questions for you:-

1) At what stage does the error get thrown up? During boot-up?
2) Do you have the software?

As you may already be aware, there is usually a "secret" key-press (or key-press combination) that allows you to progress to a diagnostics screen or menu during boot-up.

Other than that ... what have you tried so far? If you're lucky, you can sometimes get away with re-seating board and connectors - or even blasting out (what can often be) many years' worth of "fluff"!

In passing, I could mention that there used to be a couple of useful ultrasound tech forums ... but sadly they seem to have become defunct now. I suspect they were closed down for giving away too many of the manufacturers' "secrets"! frown

Good Luck! smile

* Generally due to the unit not having been closed down properly previously, for whatever reason.

** I must admit that I always looked upon this as a bit of a "sledge-hammer" approach, myself (or at least, one of last resort). But I guess those guys were always a) In a bit of a hurry, and/or b) Under a lot of pressure from the user/customer to get the thing up and running ASAP.


If you don't inspect ... don't expect.
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KMR Offline OP
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Thank you Geoff.

The system was powering up into its 'normal screen', but would show 'READ ADDRESS ERROR' with a number of status codes written across the screen where the image is normally viewed. No key presses were recognised, and I could not select any options (also time/date incorrect).

I removed the processor PCB (to replace 3V battery) from the system with the same thought of cleaning/reseating connectors etc. Today I have reinstalled the PCB and the system is now powering up and functioning as expected. I think I have been lucky on this occasion!

Many thanks for your advice and best wishes,
Keith.

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Super Hero
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Nice one. smile

Was the battery you replaced totally depleted?

I wonder if the original fault was due to garbage values (invalid date string, etc.) in the battery-backed memory (NVRAM, whatever)?

And then - if so, how did those values become valid! think


If you don't inspect ... don't expect.

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