Author Topic: QRV08 - IC4/5 and IC 8/9 LM431 must be populated?  (Read 2975 times)

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Offline mabu0815

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QRV08 - IC4/5 and IC 8/9 LM431 must be populated?
« on: October 15, 2015, 02:06:45 PM »
Hi PA,

I have a question regarding QRV08:

- IC4/5 and IC8/9 the LM431 is not seen on the picture of the populated board and in the BOM there is no order No. given/marked as "not used".
In the circuit diagram they are shown as both installed.
Can they be omitted?

Thanks

Sven

Offline peranders

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Re: QRV08 - IC4/5 and IC 8/9 LM431 must be populated?
« Reply #1 on: October 15, 2015, 07:09:34 PM »
The IC5 and IC9 are TO92 type, hole mounted. You only need one of the parts, SMD or TO92.
/Per-Anders Sjöström, owner of this forum

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Offline mabu0815

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Re: QRV08 - IC4/5 and IC 8/9 LM431 must be populated?
« Reply #2 on: October 16, 2015, 11:36:58 AM »
Hi,

Ok, I see. Thank you.
As far as I can see, Elfa now has the SMD part offered: 73-285-40

Sven