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Electronics => Beginners => Topic started by: raffs on October 13, 2015, 03:24:31 pm

Title: help to identify some components
Post by: raffs on October 13, 2015, 03:24:31 pm
Hello Masters!

Could you please, help me to identify these little components (marked in red)?
This is the D-Link DSC-930L Ip camera's back view. I believe this is the power rectification portion.
I Googled for the labels but google brings me nonsense results (maybe custom?).

The labels are:
10 leads IC => "A E-DH S13"
5 lead (SOT-23?) => "DS-P0R"

regards,
Title: Re: help to identify some components
Post by: ion on October 13, 2015, 04:17:03 pm
The SOT-23 package seems to be a 1.5V LDO.

Datasheet: http://www.s-manuals.com/pdf/datasheet/r/t/rt9193_richtek.pdf (http://www.s-manuals.com/pdf/datasheet/r/t/rt9193_richtek.pdf)

Can't find anything on the larger chip, but I would guess it's some sort of DC-DC converter IC.
Title: Re: help to identify some components
Post by: Josh on October 13, 2015, 05:32:27 pm
Maybe you could probe the pins to get an idea? Just be careful not to short anything.
Title: Re: help to identify some components
Post by: raffs on October 14, 2015, 01:14:33 am
ion, thanks for the datasheet.

This camera do not work anymore.
I'm learning electronics yet and unfortunately I don't know from where to start troubleshooting this camera.
Taking into account where this camera was installed (the mains voltage varied widely), I think some part of the power circuit burned.
This camera uses the IC http://www.ipassion.com.tw/pdf/DSH_iP2970_1.2.pdf (http://www.ipassion.com.tw/pdf/DSH_iP2970_1.2.pdf) which runs at 3.3v.
I tested the 38th pin (iP2970), it should be at 3.3v but it was at 0v.
Indication that the dc-dc converter is probably fried?
Title: Re: help to identify some components
Post by: AMS on October 14, 2015, 02:16:58 pm
Quote from: raffs on October 14, 2015, 01:14:33 am
Indication that the dc-dc converter is probably fried?

Thats a possibility, Have you checked the output of the power supply without connecting it to the board ?(if mains had issues I expect that to go first).