What's this please? (Component Advice)

[squadchannel]

N4 = Nexperia BC817DPN

WV4 = Nexperia BAT54S

[ABDELAFOU]

https://smd.yooneed.one/code4e34.html#code4e3432

[Stan13]

Hi, I have a very basic espresso machine. I asked my friend who is a technician to fix it but we can't Identify what is IC1. He says the input is 220 volts. Can anybody help me identify what chip it is so I can replace it? that chip very very small. Seems like it has BACJ9 written on top. and it seems like it has 5 pins. Thank you

P.S.
someone from other forum showed me this and it looks exactly my pcb. I can't order though. https://www.cafessole.com/recambios-cecotec/1725-placa-pcb-power-espresso-20-tradizionale.html

[gamalot]

Seems like it has BACJ9 written on top. and it seems like it has 5 pins. Thank you

https://www.ame.com.tw/datasheet/6-AME8510%208520%208530_20160322_I.14.pdf

[Stan13]

thanks. do you have any other idea? a technician said the input is 220 volts, do you think he is wrong?

[fzabkar]

Seems like it has BACJ9 written on top. and it seems like it has 5 pins. Thank you

https://www.ame.com.tw/datasheet/6-AME8510%208520%208530_20160322_I.14.pdf

There is a large inductor on the other side of the PCB. To me, the IC looks something like a Power Integrations LinkSwitch "offline switcher". Also, notice that the relay coil voltage is 6V, and the MCU seems to be powered from the same supply.

Some IC makers refer to this IC as a "non-isolated buck power switch".

Lots of examples here, but none in an SOT23-5 package:

https://www.kiwiinst.com/fglzhq

[gamalot]

Sorry my bad! try this:

https://datasheet4u.com/pdf-down/A/P/8/AP8003-Chipown.pdf

[zike]

Need help identifying these two-pin tube/lamp/indicator/? components, marked "CE-58 Q" I think although the ink is not very crisp. They are about 10mm in diameter and 50mm long overall, including pins.  Found in a drawer labeled "phototubes" but there was a lot of unrelated junk in with them (along with an unmarked photomultiplier, which I will post separately).

[gamalot]

Glow discharge tube ?

[Uunoctium]

a) cold cathode (hollow cathode) spectral lamp
b) simple neon lamp (Ne2 type)
c) voltage stabilizer
d) photocell (Cs type)

[squadchannel]

mercury tilt switch?
It can see the mercury ball.

[zike]

mercury tilt switch?
It can see the mercury ball.

No sorry, poor photo; it's a shiny nickel pill-shaped electrode you see, mounted on a thin stalk. There's no mercury.

On closer inspection I see what looks like sharpie pen on the bases, in what appears to be my late colleague's writing. One appears to say "122" and the other might be "127". So voltage regulator might be right? But the half-cylindrical lower electrode resembles that in an RCA 930 or 922 phototube, and the inner surface is greyish matte which might be a low-work function salt.

Guess I will tickle one with some current-limited HV and see what it does...

[KE5FX]

Those aren't lamps.  They look like sensors to me.  I would put them on a sensitive ammeter, or a DMM with a well-defined input resistance,  and see if they behave like current sources when you shine light on them.

Perhaps their response complements the Zr discharge lamps you powered up earlier?  Sounds like an interesting bunch of stuff to sort through.

[zike]

Those aren't lamps.  They look like sensors to me.  I would put them on a sensitive ammeter, or a DMM with a well-defined input resistance,  and see if they behave like current sources when you shine light on them.

Perhaps their response complements the Zr discharge lamps you powered up earlier?  Sounds like an interesting bunch of stuff to sort through.

Interesting, yes, but also sad; my buddy passed in August, leaving me de facto elder. As I'm about to retire myself, it's unclear what becomes of these artifacts (significant or otherwise).

I had unfortunately lost the samples, got mixed in with a box of nixie tubes. It's like the last scene in Raiders of the Lost Ark around here. Today at lunch I suddenly remembered where they went, and tested your hunch.

Bingo, they are indeed photoconductive; central wire's an anode and the half-cylinder's a photocathode.

At 40V bias, my confiscated Shenzen laser pointers (Class 4's sold as eye-safe Class 2) liberate about  250 uA/W at 650nm, 400 uA/W at 532nm, and 600 uA/W at 405nm (the latter a whopping 0.2% quantum efficiency). Blue bias suggests something like an S-3 or S-4 photocathode. However the QE is highly voltage dependent, dropping by about a factor of four at 20V bias. So they must want a higher bias; I will have to pull another DC supply out of storage.  It is also possible they're gas-assisted, would need to map out I-V under stable illumination to see.

I don't see anything looking remotely like this in the 1963 RCA phototube manual (https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/RCA-Books/RCA-Phototubes-and-Photocells-technical-manual-PT-60-Oct-1963-197-pages.pdf ). Maybe it is from another maker, or more recent?

[Nusa]

I would guess CE 58 refers to the element Cerium (Ce) atomic number 58, which is photosensitive. You might see how it responds to UV light.

[KE5FX]

Interesting, yes, but also sad; my buddy passed in August, leaving me de facto elder. As I'm about to retire myself, it's unclear what becomes of these artifacts (significant or otherwise).

Bummer    Take lots of photos, somebody may be looking for something you've got!

At 40V bias, my confiscated Shenzen laser pointers (Class 4's sold as eye-safe Class 2) liberate about  250 uA/W at 650nm, 400 uA/W at 532nm, and 600 uA/W at 405nm (the latter a whopping 0.2% quantum efficiency). Blue bias suggests something like an S-3 or S-4 photocathode. However the QE is highly voltage dependent, dropping by about a factor of four at 20V bias. So they must want a higher bias; I will have to pull another DC supply out of storage.  It is also possible they're gas-assisted, would need to map out I-V under stable illumination to see.

Yeah, those pointers are a hoot.  The strongest blue pointer out of the lot of 10 I ordered puts out ~100 mW, and who knows how much of that is the SWIR fundamental. 

I wouldn't aim it at any photocathodes I wanted to keep, including my own OEM parts...

I don't see anything looking remotely like this in the 1963 RCA phototube manual (https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/RCA-Books/RCA-Phototubes-and-Photocells-technical-manual-PT-60-Oct-1963-197-pages.pdf ). Maybe it is from another maker, or more recent?

GPT 5.2 Pro found them on page 35 of this .PDF. 

I'd guessed they were Cetron parts but my Google-fu wasn't sufficient to find this document.  Annoyingly enough the document doesn't actually give specs for CE-58 in particular, but the "CE-58-60-90" label and photo are good enough for basic ID purposes. 

There are several other referenced .PDFs but I didn't look at them all, and wouldn't be too surprised if some don't actually exist.

[zike]

GPT for the win! (Gemini just spewed gibberish.) So now I know about Cetron, thank you again. 

I still also haven't turned up specifics on the CE-58, but one theory is they could have been restricted MIL parts, not offered to the public (or to commie spies). The 10mm pencil, with no base or polarity key, shares the form of those submini pentodes  (e.g., 5678 - I have those too) intended to withstand 20,000 g's, for...reasons.  My lab was born in the MIT RadLab; we were located in Building 20 until it was torn down in '98.

Indeed, purely in the name of science, I may have done some violence to the poor cathode. Oops! That said, maybe nothing like what it was intended for.

[KE5FX]

GPT for the win! (Gemini just spewed gibberish.) So now I know about Cetron, thank you again.

For stuff like this, the free versions of both Gemini and ChatGPT are almost guaranteed to be a waste of time (and electricity and water and patience and...) compared to the heavyweight paid models, which are truly better-Google-than-Google resources. 

Gemini Pro deep research also pegged it correctly, although it takes a few more liberties than GPT did.   ("The Electric Eye—a colloquial term for the phototube—became a symbol of the modern, automated age. Factories installed them for counting products on conveyor belts, opening doors automatically, and ensuring safety on punch presses. The CE-58 was a workhorse of this revolution.  )

I still also haven't turned up specifics on the CE-58, but one theory is they could have been restricted MIL parts, not offered to the public (or to commie spies). The 10mm pencil, with no base or polarity key, shares the form of those submini pentodes  (e.g., 5678 - I have those too) intended to withstand 20,000 g's, for...reasons.  My lab was born in the MIT RadLab; we were located in Building 20 until it was torn down in '98. Indeed, purely in the name of science, I may have done some violence to the poor cathode. Oops! That said, maybe nothing like what it was intended for.

It seems these particular tubes weren't considered too exotic, since they were mentioned in the open literature.  But it's clear they also weren't very common.  It is lucky that there was any info available at all... big props to WorldRadioHistory.com for posting the one book that actually had some data.  I had certainly never heard of "Brans' Vade-Mecum" before. 

[zike]

Wow, solved! Thanks very much. 

So it appears to want 90V and 1 Meg in series. These are marked "Q" so one would expect 130 uA per lumen.  I am guessing the "G" indicates it is gas-filled (?) and perhaps "R" means a red-sensitive cathode like S-1 (contridicting my inference above).

[next3tx]

I am struggling with Bluetooth headphones from Sennheiser, one phone is out of work. But sometimes it begun to work. Seems it bad contact on PCB somewhere. Multi layer ((((
Could someone please advice which manufacture of this IC? Definitely it is power amplifier, final stage. It should be two channels, as not located on PCB another one. One phone from Left side connected nearly directly to this IC. Right phone in opposite corner of PCB.
Thanks!

[squadchannel]

usually the cable going to one side that's broken. did you check?

[gamalot]

I am struggling with Bluetooth headphones from Sennheiser, one phone is out of work. But sometimes it begun to work. Seems it bad contact on PCB somewhere. Multi layer ((((
Could someone please advice which manufacture of this IC? Definitely it is power amplifier, final stage. It should be two channels, as not located on PCB another one. One phone from Left side connected nearly directly to this IC. Right phone in opposite corner of PCB.
Thanks!

There are two chips, the one in QFN package with TBR6 marking is SGM3718 dual SPDT analog switch. The other one ...

[next3tx]

Right side connected directly to this PCB, cable has been tested as phone too

[rgammans]

This is mostly for interest, as I'm probably talking about Chinese unobtainium, but I'd like to know and understand as much as possible about the main part shown below, for instance I can't even identify the manufacturer logo.

Upload image URL

For context; So this is an HDMI Matrix IC (4in ; 2 out) ona board from China; It has a UART output producing something very much like a software debug log*; so I think there might be an inbuilt micro; it certainly handles the key buttons; and infrared source selection signal[**] all internally there are some audio parts; and some 2-wire (one SPI , one I2c) eproms with part numbers match those from Microchip; but they don't have microchip logos - but it seem reasonable to me these are chinses clones.  The eproms make me suspect that it is actually an FPGA pushed into HDMI service.

I've had two batches of these units (boards) delivered, and this 2nd batch the chip hasn't had the part numbers scrubbed and no longer has a heatsink on the top...

The part seems to have been available from the reputable (hah!) services of ebay. https://www.ebay.co.uk/itm/387691296863 at least at some point in the past.

• Once headers are soldered added to their unpopulated spot. etc.

[**] Eg the output from the demodulating receiver.

[Uunoctium]

Mfg is MStar Semiconductor