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stenio replied to Post help identifying capacitors here

in General Capacitor Questions & Issues

12-22-2023, 02:25 AM
Hi,

I tried to find the manufacturer of this cap from the logo but I found nothing. Any idea?

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Thanks,
StenioHi,

I tried to find the manufacturer of this cap from the logo but I found nothing. Any idea?
...

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stenio replied to Elmeg CS400xt ISDN telephone

in Troubleshooting Game Consoles & Other Weird Devices

10-08-2023, 11:16 PM
Re: Elmeg CS400xt ISDN telephone

I fixed it! It was a broken via on the phantom power circuit.

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stenio replied to Is this a capacitor?

in General Capacitor Questions & Issues

10-01-2023, 11:33 PM
Re: Is this a capacitor?

It is connected between the signal/power lines on a S0 bus of a ISDN phone. It makes sense.

Thanks....

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stenio replied to Is this a capacitor?

in General Capacitor Questions & Issues

10-01-2023, 11:27 PM
Re: Is this a capacitor?

I agree. No short and no sign of damage in the area.

Thanks....

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stenio replied to Is this a capacitor?

in General Capacitor Questions & Issues

10-01-2023, 11:25 PM
Re: Is this a capacitor?

I think you got it. Thanks....

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stenio started a topic Is this a capacitor?

in General Capacitor Questions & Issues

10-01-2023, 01:30 PM
Is this a capacitor?

Hi,

I cannot find anything about this component:
E
BBW C446. Is it a capacitor?
I tried to measure it inline but got no reading.
Also, the logo seems to be ST, but I am not sure. I have attached a drawing of it.

Thanks,
Stenio...

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stenio replied to Elmeg CS400xt ISDN telephone

in Troubleshooting Game Consoles & Other Weird Devices

09-25-2023, 01:08 AM
Re: Elmeg CS400xt ISDN telephone

I've found the datasheet of the IC VOGT T4 503 16 503 00:
it's an interface transformer. As for the VOGT T4 503 06 047 40 I think it's choke.

Furthermore the power should come in from pins 3/6 or 4/5 of the RJ45 socket.

Let's see where I go from here.

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stenio replied to Elmeg CS400xt ISDN telephone

in Troubleshooting Game Consoles & Other Weird Devices

09-23-2023, 07:35 AM
Re: Elmeg CS400xt ISDN telephone

I am struggling to find how the phone is powered through the S0 port.
Four of the RJ45 pins are connected to a header which is connected to an IC called VOGT T4 503 06 047 40 and then to IC VOGT T4 5031650300. Unfortunately I was unable to find a datasheet of these chips.
Two pins of the socket seems unconnected.
The first and the last one are connected to two vias but I can’t find to where they are connected.

Do you have any ideas of the porpoise of the two ICs?

I wonder if the S0 bus follows some...

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Last edited by stenio; 09-23-2023, 07:46 AM.
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stenio started a topic Elmeg CS400xt ISDN telephone

in Troubleshooting Game Consoles & Other Weird Devices

09-11-2023, 07:21 AM
Elmeg CS400xt ISDN telephone

Hello,

I need some advice with this telephone that suddenly stopped working: nothing showing on the display, no dial tone and no leds.

The telephone is powered with the ISDN RJ45 cable.
I tried to plug another phone on the same cable and it works perfectly, so the problem is not the cable nor the PBX.

I performed a visual inspection but I did not see anything strange.

No shorts on the electrolytic caps.

I measured 34V between some pins of the connector near the S0 RJ45 connector.

I also tried to see...

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stenio replied to New Members - please post your introductions here

in Announcements & Related News

09-06-2023, 03:30 AM
Re: New Members - please post your introductions here

Hello from Italy!

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