Products > Test Equipment

FNIRSI-1013D AS MUCH USE AS A CHOCOLATE FIREGUARD.

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Gannet:
I’m willing to give the display a try Peter, so I’ll order one up, what’s bothering me that the scope is sometimes very difficult to ‘turn on’ and often turns off at random.  So there’s a bigger issue somewhere?

Praps I was a bit quick on celebrating.

Cheers George

pcprogrammer:
Hi George,

the turning of could be a thermal protection of the main regulator, since it is drawing ~30% more current. The difficulty in turning it on might be related and depends on when it happens.

As you can see in the schematic, the power switch only controls an enable to the SPX29302T5, which makes the latter the actual power on part. It could have problems turning on when there is too much initial current being drawn. But this is not my field of expertise.

Did you check the other voltages in the scope, like the 1.2V, 2.5V, 3V and of course the 3.3V? Another one is VREF which should be ~1.25V.

Regards,
Peter

Gannet:
Where are the schematics Peter?

I didn’t check those other voltages yet

Cheers

George

Gannet:
Sorry Peter, belay the last. I have them so I'll check all voltages and get back to you.

Cheers

George

pcprogrammer:

--- Quote from: Gannet on November 27, 2022, 10:54:57 am ---Where are the schematics Peter?

I didn’t check those other voltages yet

--- End quote ---

Hi George,

had other things to do today, but going by your next post you found them. (The link was in my first post in this thread :) )

Cheers,
Peter

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