philips ep2231 40 Q1 U7

[samtron786]

Hello,
Which MOSFET do I have here? Is it an N-channel or a P-channel?
I have two defective ICs, Q1 and U7. What are the names of these components?
Thank you.

[CapLeaker]

Q1 I read as marking 3G- = PNP transisor BC857C
That’s not a mosfet

[samtron786]

I've done a lot of Google searching
there are two either/or options for this IC.

[samtron786]

Before
After turning on the coffee maker, it immediately rinses, and the water flows into the tray. Then the indicator lights for no water, coffee grounds, and the triangle start flashing simultaneously.
ich frage mich
was ist das jetzt U7

[CapLeaker]

Dunno. I think you got to take U7 out and see if it behaves like a MOSFET. If it is a MOSFET, it isn’t shorted and you can turn it on and off with your DMM in diode mode, it is o.k. Yours doesn’t look blown, so it should work.

[lotas]

U7 = CEW = TL431AIDBZR

[samtron786]

Thank you very much
I found something on eBay, I'll order it
https://www.ebay.com/itm/305688443074
OK, CapLeaker
I'll get it out, I'll get back to you
Thank you very much

[CapLeaker]

I also came up with the CEW may be a TL431, but the other options didn’t provide a cross match. So testing it is. Are you sure this circuit isn’t working?

[lotas]

The optocoupler could also be damaged.

[samtron786]

Hello everyone
1. BASE
2. EMITTER
3. COLLECTOR

I have no control with the black cable.
With the red cable, the BASE and EMITTER have no control.
One number: 707 EMITTER and COLLECTOR.
I've removed the part.
Thank you very much.

[samtron786]

I found part 431AR.
Is it the same, right?
U7 = CEW = TL431AIDBZR

[lotas]

I found part 431AR.
Is it the same, right?
U7 = CEW = TL431AIDBZR

Yes, it's the same thing (different manufacturers), just look at the pinout, it may be different for them.

[samtron786]

Hello, I've searched a lot, but how can I search for the REF with m m?
Thank you very much

[lotas]

Hello, I've searched a lot, but how can I search for the REF with m m?
Thank you very much

TL431

[lotas]

It is also better to replace the optocoupler IS01 (817), after the breakdown of TL431...

[samtron786]

Thank you again, I also intend to do this, it is not a problem, but I would like to first Q1 and U7 then optocoupler

[lotas]

Ok, if your ordered TL431 does not correspond to the standard pinout, then just turn it upside down, carefully lower the leads down and solder it and everything will work.