Author Topic: SSR03-15V LM431 Volt too low  (Read 16 times)

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Offline eloes51

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SSR03-15V LM431 Volt too low
« on: September 08, 2019, 11:42:53 AM »
Hi,

SSR03 board with OP, the rest soldered itself.
Plus volts 13.4V, minus volts 10.4V.
OP From PIN6 + V -6.5V
OP from -V + 3.5V.

All components checked twice.
Maybe components defective?

Please help!! :-(

Offline peranders

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Re: SSR03-15V LM431 Volt too low
« Reply #1 on: September 08, 2019, 04:14:04 PM »
Are the sense inputs connected? Have you tin drops on J1-4?
/Per-Anders Sjöström, owner of this forum

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Offline eloes51

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Re: SSR03-15V LM431 Volt too low
« Reply #2 on: September 08, 2019, 05:16:26 PM »
Hi,

Thanks for the tip.

I did not think that the AGND have no mass !!!