hybridfree/eevblog-posts huggingface dataset:
Id theses parts in a Siglent sds1000x e scope - Page 1
Forum section: electronics / repair

author: coromonadalix
author_rank: Super Contributor
timestamp: May 02, 2025, 01:01:21 pm
content: sadly one guy blew up 2 channels on a SDS1000X E serie scope, impedance become good vs the 2x other good channels, once i remove theses partsscope outside warrantydiode markings : C1051Ic markings : AUE15R3SOT23 K52G : would be a mosfet 2SK508-52 if not mistaken correct me if i'm wrongnot shown SOT23 : 3EM with a number 5 in a different position (sleeping loll)thksif i check this link some numbers do pop uphttps://www.eevblog.com/forum/repair/siglent-oscilloscope-sds2104x-repair-help/msg2799160/#msg2799160the AUE ic could be an OPA727 ?? need to check board pinout/layout ? but bandwith ?? not even sure if it is in the signal path ..K52g seems to be confirmed as an 2sk508 ?

author: tautech
author_rank: Super Contributor
timestamp: May 02, 2025, 05:35:11 pm
content: Quote from: coromonadalix on May 02, 2025, 01:01:21 pmMMBTH10 ?

author: coromonadalix
author_rank: Super Contributor
timestamp: May 03, 2025, 01:36:00 am
content: thks things to check, i had 32 ohms of impedance before removing theses partsmostly this ic will be the hard one to find ... help ?

author: tautech
author_rank: Super Contributor
timestamp: May 03, 2025, 10:30:57 am
content: AUE 15R3 is the hard one, is it 8 pin SOIC or a slightly different package ?Anything tricky pays to properly identify the package.....I've had success finding difficult parts with just a search on AliExpress.

author: coromonadalix
author_rank: Super Contributor
timestamp: May 06, 2025, 05:16:41 pm
content: AUE ic really seems to be OPA727AIDGKR ?? thks for the hinthttps://www.aliexpress.com/item/1005008612114140.html?https://www.aliexpress.com/item/1005008611851541.html?

author: tautech
author_rank: Super Contributor
timestamp: May 12, 2025, 01:25:29 am
content: Further to your PM...We don't have any access to any schematics....The C1 diode you speak of, where is it on the PCB ?I have a 4ch X-E PCB and can do most static measurements.

author: coromonadalix
author_rank: Super Contributor
timestamp: May 12, 2025, 02:08:30 am
content: near the relays, in the front endyou have this AUE ic and next to it, you have theses 2 tiny C1 marked diodes, as written i have around 2.4 volts between their legs when the scope is powered upthe good channels i'm talking about ...many smd parts websites are giving around 2.4 volts zenners ??

author: tautech
author_rank: Super Contributor
timestamp: May 12, 2025, 02:37:03 am
content: Quote from: coromonadalix on May 12, 2025, 02:08:30 amSilkscreen markings DC1 and DC4Both measure as reversed biased (back to back) l<>l diodes with SMD tweezers....can't even see the C1 even with a jewelers loupe !
ID this chip? - Page 1
Forum section: electronics / repair

author: Audiorepair
author_rank: Frequent Contributor
timestamp: May 14, 2021, 03:00:03 pm
content: Can't seem to find this IC, it is generating +15v and - 15v from 12v.Thanks.

author: gamalot
author_rank: Super Contributor
timestamp: May 14, 2021, 03:41:00 pm
content: AOZ1283PIhttp://aosmd.com/res/data_sheets/AOZ1283PI.pdf

author: Audiorepair
author_rank: Frequent Contributor
timestamp: May 14, 2021, 05:50:51 pm
content: Ah, thanks.Weird, I tried to Google Z1283PI on 2 different days and got no hits, now it just comes up with the part first time.Clearly I am intermittently faulty.
Id this chip - Page 1
Forum section: electronics / repair

author: coromonadalix
author_rank: Super Contributor
timestamp: December 06, 2019, 12:26:50 pm
content: Its used in a can bus interface right after an sn65hvd251 / "vp251 markings" transceiverZ07D markings, sot 363 casingpin1 from vp2512 ground3 out to an stm324 from vp2515 vcc 3.3 volts6 out to an stm32, pulled to vcc 3.3 k thru 10k ohmsNo direct connections or low ohms between in and outs, not sure its an esd protection device ?Searched on smd databases, nothing conclusive ?thks

author: nali
author_rank: Frequent Contributor
timestamp: December 06, 2019, 12:59:39 pm
content: This?https://www.onsemi.com/pub/Collateral/NC7WZ07-D.PDF

author: coromonadalix
author_rank: Super Contributor
timestamp: December 06, 2019, 03:23:28 pm
content: you da man thksNever tough of buffers ... surprised to see this chip applied here, unlees they use it to make a level shifter between the vp251 (5vdc supply) and the stm32 at 3.3 volts ??
ID this connector & female pins - Page 1
Forum section: electronics / repair

author: dorkshoei
author_rank: Frequent Contributor
timestamp: January 14, 2023, 11:38:38 pm
content: 2.54 spacing but it's not a Molex KK as the pins are enclosed.

author: timeandfrequency
author_rank: Frequent Contributor
timestamp: January 17, 2023, 04:33:05 pm
content: Hi dorkshoei,You may have a look to the following crimp terminals that have similar shapes to the one you pictured. Double-check with the datasheet drawing to confirm that the size actually matches.It's sometimes easier to find out the connectors' ID, once you know the crimp terminal reference.a)TE Connectivity, Economy Power Female Crimp Terminal 18AWG 1123721-1b)TE Connectivity, Dynamic 1000 Female Crimp Terminal 22AWG 1827587-2c)TE Connectivity / AMP Automotive Connectors 040MLC SKT 22-18 CU/SN Mfr. #: 175265-1d)TE Connectivity / AMP Automotive Connectors MQS BU-KONTAKT Mfr. No: 968221-1
ID this SMD? - Page 1
Forum section: electronics / repair

author: Audiorepair
author_rank: Frequent Contributor
timestamp: January 25, 2022, 10:17:39 am
content: Hi,this is a synth keyboard scanning circuit with these 5 pin devices connected to each keys' 2 pads, only there is no service manual for this and I don't know what they are, they are normally not present on such key PCB's.The onboard scanning IC is this one:https://www.ti.com/lit/ds/schs147j/schs147j.pdf?ts=1643094277130&ref_url=https%253A%252F%252Fwww.google.com%252FNormally these keyframes are scanned from the CPU side, not locally like this one.It's a Korg MS20 Mini.Cheers.

author: xrunner
author_rank: Super Contributor
timestamp: January 25, 2022, 12:21:59 pm
content: You can check this database - go to "G9"https://smd.yooneed.one/I don't know what the last symbol is there, but it might just be a diode or transistor. All five pins might not be used

author: abdulbadii
author_rank: Frequent Contributor
timestamp: January 25, 2022, 12:42:06 pm
content: G9? so baffled by the last letterSOT-353 NPN digital transistorsas onhttps://www.s-manuals.com/smd/g9

author: gamalot
author_rank: Super Contributor
timestamp: January 25, 2022, 12:53:50 pm
content: UMG9Nhttps://fscdn.rohm.com/en/products/databook/datasheet/discrete/transistor/digital/umg9ntr-e.pdf

author: Audiorepair
author_rank: Frequent Contributor
timestamp: January 25, 2022, 01:39:43 pm
content: Ah, excellent, thanks to all.Drew a blank at G9 myself, not in the SMD codebook.Farnell even have umg9n in stock.

author: fzabkar
author_rank: Super Contributor
timestamp: January 25, 2022, 05:22:28 pm
content: This resource lists it:http://www.smdmark.com/en-US/search/code?id=g9

author: Audiorepair
author_rank: Frequent Contributor
timestamp: January 25, 2022, 06:36:08 pm
content: Quote from: fzabkar on January 25, 2022, 05:22:28 pmThanks, I did Google another source and that had no G9's either.I shall make this my primary source in future then.
Idenfitying a mouse micro switch - Page 1
Forum section: electronics / repair

author: Pcmaker
author_rank: Regular Contributor
timestamp: December 31, 2019, 02:58:25 am
content: I have a gaming mouse that I like and it's not being made anymore. I bought 10 of them 10 years ago, and now they're going for around $350 used on eBay.Out of those 10, only 3 remain. I regret throwing away the ones that broke, mostly broken buttons. Now I have to keep repairing what I have left.The only markings I see on the button is H2 M. The letter "M" is inside a circle. I can't find it on Google. I like these buttons because they're a lot softer than regular mouse buttons.The mouse is a Steelseries Cataclysm mouse, which they made when Cataclysm expansion came out.This is the underside of the switch:

author: amyk
author_rank: Super Contributor
timestamp: December 31, 2019, 03:12:54 am
content: Matsushita/Panasonic EVQP0E07K

author: Pcmaker
author_rank: Regular Contributor
timestamp: December 31, 2019, 03:23:55 am
content: Thanks, I found them on eBay. They should all be the same, right? It didn't say Panasonic

author: andy3055
author_rank: Super Contributor
timestamp: December 31, 2019, 04:54:49 am
content: Quote from: Pcmaker on December 31, 2019, 03:23:55 amMatsushita and Panasonic are the same company.

author: Pcmaker
author_rank: Regular Contributor
timestamp: December 31, 2019, 05:26:34 am
content: This is what I boughthttps://www.ebay.com/itm/10PCS-Original-Mouse-Square-Micro-Switch-EVQP0E07K-Microsoft-Black-Spots-JKH-FL/303344862936?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

author: andy3055
author_rank: Super Contributor
timestamp: December 31, 2019, 06:00:25 am
content: That should work.

author: amyk
author_rank: Super Contributor
timestamp: December 31, 2019, 06:00:51 am
content: If they don't say Panasonic nor Matsushita then it's probably a Chinese clone --- which is likely to work too, but may not have the same reliability. They're cheap enough, however.
Identification component Philips airfloss - Page 1
Forum section: electronics / repair

author: f114
author_rank: Newbie
timestamp: November 28, 2022, 03:42:46 am
content: Please could someone help me to identify this component.I already looked for some datasheets but I didn't find this code 2N4B6.

author: amyk
author_rank: Super Contributor
timestamp: November 28, 2022, 04:38:10 am
content: DMG6968U, apparently manufactured in June of 2014.
Identification du transformateur sur une carte d’alimentation 17IPS72 Vestel - Page 1
Forum section: electronics / repair

author: Said_83
author_rank: Newbie
timestamp: December 01, 2024, 02:36:47 pm
content: Bonjour,Je cherche à identifier le transformateur situé en haut à droite sur une carte d’alimentation de marque Vestel (voir photo jointe). Malheureusement, je n’ai pas d’informations précises concernant les références inscrites sur le transformateur ou sur la carte elle-même.Si quelqu’un reconnaît cette pièce ou peut m’aider à trouver un modèle équivalent, je serais très reconnaissant.Merci d’avance pour votre aide !

author: PA0PBZ
author_rank: Super Contributor
timestamp: December 01, 2024, 03:34:39 pm
content: 1) Your picture is missing.2) This board is English, even if you don't feel comfortable using English use a translator, for instancehttps://www.deepl.com/nl/translatorand try to proofread what it did.

author: Andy Watson
author_rank: Super Contributor
timestamp: December 01, 2024, 03:41:46 pm
content: There is a high probability that the transformers in this design are custom made. Are there any part numbers on the transformer?https://elektrotanya.com/showresult?what=vestel%2017IPS72&kategoria=&kat2=all

author: DavidAlfa
author_rank: Super Contributor
timestamp: December 01, 2024, 04:42:54 pm
content: Transformers are very rare to fail (Unless you break them), are you sure it's the culprit?Vestels common failures are diodes or LED backlight strip.Big picture:
identification needed. Blown IC onboard miele washing machine ELP 160 - Page 1
Forum section: electronics / repair

author: PiotrMisiuna
author_rank: Contributor
timestamp: August 06, 2023, 02:25:05 pm
content: really nicely blown IC. Probably smps driver or power factor correction. I made a photo through an ocular of my microscope, silicone is cooked by phillips. any ideas?Partial symbols visible are

author: DavidAlfa
author_rank: Super Contributor
timestamp: August 06, 2023, 02:57:00 pm
content: TEA1522Thttps://www.elektroda.pl/rtvforum/topic3310220.html

author: PiotrMisiuna
author_rank: Contributor
timestamp: September 07, 2023, 07:13:40 pm
content: Thanx one more time, washing machine started. No other issues.
Identification of a component with the color code orange, orange, gold, silver. - Page 1
Forum section: electronics / repair

author: miette_Kruemelchen
author_rank: Contributor
timestamp: March 06, 2024, 03:34:20 pm
content: Hello eevblog members,I am facing a challenge with the motor control of an industrial stirring device from Janke & Kunkel. Unfortunately, I do not receive schematics from the manufacturer for this older control unit.In my investigations, I have come across a component in the power electronics that I cannot clearly identify. It appears to be a resistor. This component has a resistance value of 0.3 ohms. The component has the color code orange, orange, gold and silver. My suspicion is that it might be a capacitor. It is located on my drafted schematic, parallel to resistor R4, and is marked with a question mark.Could any of you assist me in identifying this component?Thank you in advance for your help!Best regards,Sven

author: pcprogrammer
author_rank: Super Contributor
timestamp: March 06, 2024, 04:07:17 pm
content: For a resistor the color rings would indicate 3.3 Ohms, but since you measured it to be 0.3 Ohms it probably is acoil or a chokeof 3.3uH.Check out thecalculator.
Identification of Power Supply Module (Telindus -48V PST-27) - Page 1
Forum section: electronics / repair

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: January 30, 2018, 02:16:04 am
content: Hello everyone,I have quite a problem with a special Eurocard AC-to-48V power supply module.The original seller does not support it anymore but our customer needs to operate it.The equipment is a Telindus Card Nest CN4 communications rack. But I think that a Telco manufacturer would rather get their power supplies from elsewhere. So the question is:Does anyone recognise the real maker of the SMPS module shown or give any other Information about it?The designation seems to be PST-27. In another place, it shows the code PT376.Connector is H11, the circuit is built around a ML4826 (Fairchild). I do not even have the complete allocation of the H11-connector, so I can't even test it! Customer removed it because 'Error' LED was lit, if supplied with AC power on the desk, it does nothing except charge the main caps. Not the slightest optical (or olfactory) hint!

author: informix
author_rank: Newbie
timestamp: May 09, 2019, 02:26:13 pm
content: Hi,Still interested in PS for CN4?I have some stock of old but new/newer used Telidus/OneAccess items like CN4, CN2, modem/routers/modules ...Regards,Adam

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: May 11, 2019, 03:55:44 am
content: Quote from: informix on May 09, 2019, 02:26:13 pmHello, could you please PM me your regular contact data so that I can forward it to the colleague who is the 'owner' of this stuff now? I was merely helping out there.
Identification of resistor type - Page 1
Forum section: electronics / repair

author: Traceless
author_rank: Frequent Contributor
timestamp: August 22, 2022, 07:43:18 pm
content: Most handheld DMMs have a pair of green resistors close to the input jacks (see picture). Judging by the size those are 2 or 3W resistors, but what type are they? Carbon film, metal oxide film, sth else? I've been looking at some parts distributors for similar items but most have different colors (mostly white or brown). The only green ones I found don't have the color band code.

author: TimFox
author_rank: Super Contributor
timestamp: August 22, 2022, 08:19:40 pm
content: My guess is metal-oxide (cermet) 2 W flame-proof resistors.

author: Swainster
author_rank: Frequent Contributor
timestamp: August 22, 2022, 08:59:53 pm
content: The ones in the pic look like Bourns FW series fusible wirewound.

author: Wallace Gasiewicz
author_rank: Super Contributor
timestamp: August 22, 2022, 10:47:00 pm
content: Fifth Band on ResistorBlack- Wire WoundWhite FusableOtherwise it is tolerancePerhaps the 5th band is white and discolored somewhat, at least may appear so in the picture, which is quite good.

author: exmadscientist
author_rank: Frequent Contributor
timestamp: August 23, 2022, 04:00:03 am
content: It's possible they're ceramic composition types. I have a few of those lying around unused from an old project that are dead ringers for that body shape and color. The bands don't match though, so

author: Traceless
author_rank: Frequent Contributor
timestamp: August 23, 2022, 05:40:18 am
content: Thanks everyone for their feedback so far, since we were not 100% sure yet what the type is - with the majority leaning towards fusible and/or wirewound, eventually (Bournes FW series) which indeed looks similar I looked up one of Dave's teardowns (Fluke vs. Brymen., link below, resistors are visible around timestamp 16:45 and later) for additional reference. Similar resistors can be seen on both meters during the teardown albeit those have only a 4-band code. They seem to serve the same purpose as the resistors on the picture above. In the video Dave also states that these four-band ones are "fusible resistors". So I think probably Swainster identified them correctly and will assume they are indeed Bournes FW wirewound types.Does anyone know if there is a significat difference between those green types and those white ones?

author: abdulbadii
author_rank: Frequent Contributor
timestamp: August 23, 2022, 10:25:13 am
content: roughlyfusible if silver/white is the last band
Identification of SMD capacitor (100 C99) - Page 1
Forum section: electronics / repair

author: Traceless
author_rank: Frequent Contributor
timestamp: March 07, 2023, 10:00:18 pm
content: On the right side of the board shown on the picture below is a column of eleven pretty large SMD capacitors (located above and below the label "AOS 6930"). I've tried to google for SMD capacitors along with the label "100 C99" but haven't found anything that looks like those. Can anyone tell if those are 100µF tantalums or something else? (the SMD tantalums I know are usually yellow) What is the name of the form factor and is there any way to tell what voltage those are rated for?

author: RES
author_rank: Regular Contributor
timestamp: March 07, 2023, 10:13:47 pm
content: Are Panasonic POSCAP tantalum-polymer SMD capacitors:https://na.industrial.panasonic.com/products/capacitors/polymer-capacitors/lineup/poscap-tantalum-polymer

author: Traceless
author_rank: Frequent Contributor
timestamp: March 07, 2023, 10:17:45 pm
content: Thanks RES, yes those look indeed similar from the picture I think those could be from theTPF Series.
Identification of Transistor D471C on a PHIHONG PSA-2B PSU - Page 1
Forum section: electronics / repair

author: john2021
author_rank: Contributor
timestamp: August 27, 2024, 08:54:32 am
content: Hello everyone,I am trying to repair an Apple II clone PSU from the 1980s.I have a shortened transistor, which reads "D471C Y-3C5".Attached are photos of its location on the PSU board.I was unable to identify it online.I want to find an equivalent part.I would appreciate your help in identifying and finding an equivalent.Thank you very much in advance,Joe

author: PA0PBZ
author_rank: Super Contributor
timestamp: August 27, 2024, 10:36:51 am
content: Normally with a marking like that you put '2S' in front, so that would be 2SD471C.

author: john2021
author_rank: Contributor
timestamp: August 28, 2024, 06:20:14 am
content: Thank you very much for your help.I replaced it with a BC639 and now it is working.Now the issue is with the motherboard, but I guess it's a question better suited for an Apple clone forumThanks again, much appreciatedJoe
Identify 10 pin SMD ic “406R SNAB”... - Page 1
Forum section: electronics / repair

author: peteb2
author_rank: Regular Contributor
timestamp: June 28, 2020, 06:59:47 am
content: Has anybody met this device please? It’s a 10pin device with what appears to be its output driving the Gate on an N-chnl HAT2198 MOSFET ‘switch’ via a 330ohm resistor.It’s part of buck-boost circuit, the HAT2198 switching a DC voltage to another stage. I’m trying to back engineer the board to discover why all of a sudden, the main ic (LTM4609Y regulator) goes screaming HOT ...Google has not thrown up anything in the way of a datasheet and 406R is a search beacon for a resistor! TIA

author: PA0PBZ
author_rank: Super Contributor
timestamp: June 28, 2020, 09:08:12 am
content: LM5069https://www.ti.com/lit/ds/symlink/lm5069.pdf
Identify 5AR/SAR step-down converter - Page 1
Forum section: electronics / repair

author: fzabkar
author_rank: Super Contributor
timestamp: May 24, 2023, 09:20:05 am
content: Could someone please help me to identify the step-down converter marked 5AR or SAR?https://forum.hddguru.com/viewtopic.php?f=10&t=43366(thread)https://forum.hddguru.com/download/file.php?id=23867&mode=view(photo)I suspect that the following ICs are pin compatible.RT8010GQW, Richtek, 1.5MHz, 1A, High Efficiency PWM Step-Down DC/DC Converter, 2.5V to 5.5V input, marking ET, adjustable:https://www.richtek.com/assets/product_file/RT8010=RT8010A/DS8010A-12.pdfhttp://www.ame.com.tw/datasheet/AME5250.pdfhttps://www.mouser.com/datasheet/2/115/DIOD_S_A0010935831_1-2513132.pdfThere is also a second unidentified converter marked "rDDMC" (DFN-8).
Identify 6p SMD switching ng ic device - Page 1
Forum section: electronics / repair

author: diag7919
author_rank: Contributor
timestamp: April 15, 2024, 07:23:53 pm
content: Hi guys, my battery charger just stopped working, zero life but faint burning smell which I have had a look and done a bunch of diode tests. No shorts, nothing so wondering if the main switching IC has let go.. looks like only 1 secondary with zero volts on the reservoir cap.. fuses all good, I have rectified mains voltage present on the primary cap.. anyway, I have no idea and spent a fair time searching for this ic, has anyone got any ideas.. using my phone I "think" the markings are 63H30a 347..ThanksNick

author: fzabkar
author_rank: Super Contributor
timestamp: April 15, 2024, 11:18:04 pm
content: Check R12 and R13 for open circuits.Check or replace the capacitor on the IC's Vcc pin (D3 cathode).Does D2 look like it's cooked?

author: amyk
author_rank: Super Contributor
timestamp: April 16, 2024, 03:28:10 am
content: I believe that's an OB2263.

author: diag7919
author_rank: Contributor
timestamp: April 18, 2024, 03:19:53 pm
content: Thanks guys.. I've got a magnifying eye glass coming for future plus another charger from same brand has stopped working, both being used at my son's house so he has dicky electrics.... I will double check those resistors..
identify a part - Page 1
Forum section: electronics / repair

author: moose
author_rank: Contributor
timestamp: June 10, 2024, 08:38:02 am
content: Hii have an AliExpress battery management board and i'm trying to identify a particular part.It has the marking P5549P & the logo appears to be 'KM' or 'HvM'.I suspect it may be an 8 pin dual channel mosfet....thanksmoshe

author: moose
author_rank: Contributor
timestamp: June 29, 2024, 05:37:52 am
content: I received an answer from the manufacturer of the MCU that is used in the board.I received an answer from the manufacturer of the MCU that is used in the board.To anyone interested...I received an answer from the manufacturer of the MCU that is used in the board"It's a P-channel MOS with SOP8 package. The manufacture is Huamei, which is a small local MOSFET brand. Their products used to be pretty popular in domestic power tools application, however, they gradually exited this market for poor margin."Looking on element14's site I see that this would work: STS6P3LLH6, 30V 6A power MOSFET.
Identify a resistor in a Yihua 1503D DC Power Supply - Page 1
Forum section: electronics / repair

author: Nide1
author_rank: Contributor
timestamp: February 26, 2021, 06:43:23 pm
content: I just pulled this power supply to bits and found a blown mosfet and blown resistor, not sure what the ohms of the resistor is, can anybody help me.My guess 0.18 ohms 2%, let see how far I'm out.

author: bdunham7
author_rank: Super Contributor
timestamp: February 26, 2021, 07:12:54 pm
content: Quote from: Nide1 on February 26, 2021, 06:43:23 pmSometimes colors don't look exactly right in photos and sometimes color bands can change when baked by an overheated resistor, so the question is are those red or brown? They both look the same to me, so if they are both brown, it appears to be 0R18 (0.18 ohms) 1% tolerance, which is a plausible value. If they were both red, it would be 0R28 (0.28 ohms) 2% tolerance, which is not as likely a result. 0.28 would be an E96 value, which would usually imply a tolerance of 1% or better. (see the second link for an explanation) A quick check of Mouser confirms that there are no 0R28 2% resistors listed (although they do have 3% and 5%) but there are numerous 0R18 1%. So I'd bet on brown.https://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-resistor-color-codehttps://www.electronics-notes.com/articles/electronic_components/resistors/standard-resistor-values-e-series-e3-e6-e12-e24-e48-e96.php

author: Nide1
author_rank: Contributor
timestamp: February 26, 2021, 07:47:03 pm
content: Thanks for the speedy reply bdunham7.sounds good to me, we will go with brown and I may dig the variac out.
Identify ALPS encoder - Page 1
Forum section: electronics / repair

author: Daxxin
author_rank: Regular Contributor
timestamp: April 19, 2020, 07:33:53 am
content: hi , help me pls to identify this ALPS encoder

author: MarkF
author_rank: Super Contributor
timestamp: April 19, 2020, 05:58:44 pm
content: You didn't provide any dimensions???It might be a Alps EC11 or Alps EC12.I have been using PEC11 encoders in my projects.

author: wraper
author_rank: Unknown
timestamp: April 19, 2020, 06:05:30 pm
content: I suggest taking it apart and count number of detents if they are present and number of contacts to get pulse number per turn. Then select replacement accordingly.

author: Daxxin
author_rank: Regular Contributor
timestamp: April 19, 2020, 06:31:04 pm
content: Thanks for quickly help, here the inside pic visible detents , 3 contacts , for sure EC12 the shaft is plastic.

author: wraper
author_rank: Unknown
timestamp: April 19, 2020, 06:37:47 pm
content: Seems like 24 pulses, can you take out wiper part to see if there are any detents underneath? On second thought looks like there are none.
identify an smd capacitor - Page 1
Forum section: electronics / repair

author: Maurizio1957
author_rank: Contributor
timestamp: December 31, 2022, 03:48:39 pm
content: Hi all, I am trying to fix an Advantest R3463 SA ( seehttps://www.eevblog.com/forum/repair/advantest-r3463-trouble/msg4463401/#msg4463401),I don't know if I have correctly identified the voltage rating of this capacitor:the size is diameter = 6,5 mm high = 6 mm.I think 47uF ok, but voltage 16 or 25 v?There are others same size marked 33 ( ok 33 uF) EBH 7J5.I searched on Chemicon, Nichicon and Wurth but nobody as a similar marklike these ( these capacitors are > 20 years old) .Thanks and happy new year to all by Maurizio

author: PA0PBZ
author_rank: Super Contributor
timestamp: December 31, 2022, 04:01:49 pm
content: This will help you:https://www.mouser.com/datasheet/2/315/RDE0000C1259-1772497.pdf

author: gamalot
author_rank: Super Contributor
timestamp: December 31, 2022, 04:48:38 pm
content: All manufacturers I know use the same voltage codes system on aluminum electrolytic capacitors, polymer capacitors, and tantalum capacitors.https://forum.digikey.com/t/smt-electrolytic-capacitor-with-no-voltage-rating/974

author: Maurizio1957
author_rank: Contributor
timestamp: January 01, 2023, 12:54:02 pm
content: Thank you all!!Now I have clearer ideas.Happy new year!73 de Maurizio
Identify and replace shortened components - Focusrite 2i4 2nd gen - Page 1
Forum section: electronics / repair

author: luchomatic
author_rank: Newbie
timestamp: April 26, 2020, 06:08:22 pm
content: Hi!I'm an electronics enthusiast with very bad luck, yesterday during a thuderstorm a ligthing came through my window and fried my PC motherboard, I had my Focusrite 2i4 2nd gen audio interface connected through USB to the motherboard and it fried it as well.It won't turn on or give any lightI dissasemblied it and connected it to the USB cable and I noticed that the first capacitor out of a set of 3 that are the first components on the USB power path has a black mark on top, and it overheats to a point that I can't touch it for more than a second.This capacitor doesn't have numbers on it, it just says "CAREFV." or "CAREFU." I'm not sure.The other black capacitor that is shown in the image on the right seems to be the same one as the overheating one, it hast the same label shape and size.The rest of the components are just cold.How can I identify the capacitor to ask for a replacement?Is it possible that the capacitor is messed up and if i replace it the Focusrite will come back to life?Gallery with more imageshttps://imgur.com/a/0MB4G9UThanks in advance!

author: Manul
author_rank: Super Contributor
timestamp: April 26, 2020, 06:14:39 pm
content: It is an inductor, not a capacitor, so there is no need to change that. Look for a short in 5V path.

author: james_s
author_rank: Super Contributor
timestamp: April 26, 2020, 06:18:38 pm
content: I'd bet there's a shorted semiconductor somewhere in there, probably one of the voltage regulator ICs or if you get lucky there might be a transient protection diode that has failed.

author: Manul
author_rank: Super Contributor
timestamp: April 26, 2020, 06:21:13 pm
content: D21 looks suspicious. Measure the 5V rail with a multimeter, I bet you have a short.

author: luchomatic
author_rank: Newbie
timestamp: April 27, 2020, 01:06:14 am
content: Thank you for your answer!I studied some more and did another test like you suggested and found that the "ij16" or "1j16" semiconductor is extremely hot. I added two pictures to the gallery on top to show this component. Should I buy one and replace it? or what's the usual procedure to fix a circuit board like this one?https://imgur.com/a/0MB4G9U

author: luchomatic
author_rank: Newbie
timestamp: April 27, 2020, 01:07:38 am
content: You were right!I just added 2 pictures on Manul reply showing the semiconductor that overheats extremely, how do you think I should proceed now? just replace it? or is there anything else I should do before ordering it?Thanks again!

author: Manul
author_rank: Super Contributor
timestamp: April 27, 2020, 01:52:52 am
content: That is U16 (U marking means IC's). It is MP2159GJ. It is probably bad, so yeah, you should replace. But the thing is that thunder is extremely unpredictable thing and there is no guarantee, that there is no more damaged parts.
Identify Barrel Connector - Page 1
Forum section: electronics / repair

author: bikeseat
author_rank: Newbie
timestamp: November 14, 2023, 10:45:55 am
content: I'm trying to identify a barrel connector so I can buy a pigtail to connect the power adapter to my Ruideng RD6006. Wondering if anyone here can point me in the right direction.Power Adapter Model A10024_EPN for a Samsung S34E790C monitor. The outer diameter is about 6.3mm and it has a center pin.Attached are some pictures.B

author: tooki
author_rank: Super Contributor
timestamp: November 14, 2023, 10:27:48 pm
content: Take a look at the table onhttps://en.wikipedia.org/wiki/Coaxial_power_connectorI bet you’ll find one or two likely candidates in that list.

author: t1d
author_rank: Super Contributor
timestamp: November 16, 2023, 12:44:49 am
content: If you can not find the adapter thingy, you could do this:- Cut the present connector off of the power module. Leave yourself a good ten inches of wire on the plug.- Crimp, or solder, a female spade connector to the hot wire of the power module. Crimp, or solder, a male spade connector to the ground wire of the power module.- Purchase a plug that will fit the RD6006. Crimp, or solder, a female spade connector to the ground wire of the power module. Crimp, or solder, a male spade connector to the hot wire of the power module.- Repeat this process, for the original power module connector, so that the power module may still be used with the device that it came with.Now, the power module is "universal" and you do not have to find a specialized adapter that has the exact two ends that you need. HTH.
Identify chip L7c - Siemens kitchen appliance (oven) repair - Page 1
Forum section: electronics / repair

author: pplaninsky
author_rank: Regular Contributor
timestamp: September 11, 2024, 05:44:57 pm
content: Hello,It’s a control PCB from an kitchen oven.The issue it lost comms with the user interface board on the front panel.The chip is on the TX path of the data line (single wire for TX/RX running on 50Hz clock, generated from the mains).The obvious purpose is to buffer that line as the other side is pulling the same wire to ground when transmitting.[At least it’s what I think.]However, it seems that at the moment this chip pulls down the line constantly to 2.3 volts, which is too low compared to the 5 volts level observed otherwise.However, I couldn’t find any datasheet that matches the pinout.Anyone - can you help me identify this chip?

author: suntime
author_rank: Contributor
timestamp: September 11, 2024, 06:44:54 pm
content: Hi,Maybe it is: NL17SZ07DFT2Ghttps://www.lcsc.com/product-detail/Buffers-Drivers-Receivers-Transceivers_onsemi-NL17SZ07DFT2G_C113255.htmlRegards.

author: pplaninsky
author_rank: Regular Contributor
timestamp: September 11, 2024, 08:21:43 pm
content: Seem to match the pins and purpose.Thank you.I am wondering, if I can just temporary shunt the buffer - just to test the functionality of the PCB.My guess is that if you connect just 2 devices, the sink current on the MCUs should be good enough.This buffer is probably for over voltage protection and when you chain more devices

author: pplaninsky
author_rank: Regular Contributor
timestamp: September 15, 2024, 02:51:09 pm
content: As I couldn’t find such replacement chip, I bodged a 7407 and used one of the six buffers from it.Works perfectly.

author: fzabkar
author_rank: Super Contributor
timestamp: September 15, 2024, 04:54:18 pm
content: Quote from: pplaninsky on September 15, 2024, 02:51:09 pmhttps://au.mouser.com/c/?q=NL17SZ07DFT2G
identify chip marking 8KB RX (RX Vertical) - Page 1
Forum section: electronics / repair

author: zoolf
author_rank: Newbie
timestamp: February 09, 2022, 01:46:41 pm
content: Hi,so I try to fix my laptop, when charger is plugged an IC TPS51285a heat up a lot, so I changed it but still same problem, so when I inject 19v 1amps, in the 19v main rail that chip heat up, but when I inject less than 1amps (500mA) the chip is pulsing, i observe it with IR cam it, but I have a 6 pin chip with marking 8KB RX (RX is vertical) heat a little.can you help me identify this chip?Attached the Pic
identify chip marking C721 - Page 1
Forum section: electronics / repair

author: bateau020
author_rank: Frequent Contributor
timestamp: February 09, 2022, 06:56:14 am
content: Been asked by a client to reverse engineer, or at least bring back to life, a device from a provider of theirs that just went bust, and disappeared without any willingness to collaborate. The device is a GPS tracker. The client has a fair amount of these in the field, but since the devices report to the cloud solution from the company that went bust, they now suddenly are paperweights. Hence the request for my involvement. The device is really simple: a Cypres ARM0 SOC with a GSM + GPS module from SIMCOM and some small stuff around it, but there is one chip that puzzles me. See the picture, it is the one in the middle, marked C721, a holographic sticker on it, 10-Lead QFN (2mm × 2mm).Anyone having an idea? Am afraid it is a cryptographic device.

author: fzabkar
author_rank: Super Contributor
timestamp: February 09, 2022, 11:26:01 am
content: It looks similar to this one:https://www.eevblog.com/forum/repair/help-identifying-a-sensor-(i-think)/msg3669799/#msg3669799

author: bateau020
author_rank: Frequent Contributor
timestamp: February 09, 2022, 11:50:20 am
content: wow, looks like an I2C pressure sensor. No idea why they put that in there. It being next to the eeprom led me astray. Thanks for the hint.
Identify chip - Page 1
Forum section: electronics / repair

author: assen.krastev
author_rank: Newbie
timestamp: October 02, 2023, 11:53:42 am
content: Hello,I'm trying to repair my home automation server (loxone mini server). I blew out one of its buses (loxone tree, some kind of CAN bus) by incidentally touching 220V to it. I'm trying to identify one of the blown chips (attached). Does anyone recognize the chip in the photo?

author: gamalot
author_rank: Super Contributor
timestamp: October 02, 2023, 12:32:02 pm
content: TBU-CA050-100-WHhttps://www.bourns.com/docs/Product-Datasheets/TBU-CA.pdf

author: assen.krastev
author_rank: Newbie
timestamp: October 06, 2023, 05:41:33 am
content: Thanks a lot!
Identify Component connected to high voltage power supply - Page 1
Forum section: electronics / repair

author: axawire
author_rank: Contributor
timestamp: January 10, 2021, 01:20:22 am
content: HelloI have a used Matsusada high voltage power supply S3-15P, spec sheet attached. The output lead though is permanently affixed to a some kind of tube. What is this tube (see attached pictures)? I need the 15kV output can I just cut it off or is it a fundamental part in the generation of the 15kV output?Thanks

author: Gyro
author_rank: Super Contributor
timestamp: January 10, 2021, 11:17:28 am
content: I think it is probably a high voltage current limiting resistor, maybe specific to a safety requirement in the previous application.The tube has heatshrink on the ends, so you could maybe remove this and see what's inside - though the internal resistor is probably potted, maybe in silicone, so probably not easily removable.Two thoughts...1. Are you needing a higher current than it provide with the resistor in place. If not, leave it alone.2. How will the PSU react to a an accidental short circuit without the resistor?

author: JackJones
author_rank: Regular Contributor
timestamp: January 10, 2021, 11:57:04 am
content: Could be a high voltage fuse. The ones I've seen in microwaves have looked similar.

author: SeanB
author_rank: Super Contributor
timestamp: January 10, 2021, 12:28:49 pm
content: No, high voltage current limiting resistor, there to limit the output current into a short, as likely the driver will blow up if directly shorted, so leaving it in circuit is needed. Will not affect power supply operation, as it is designed to be used with it in place. The manual specifically mentions these modules will blow up if the output is short circuited, so it is needed in the output. Preferably when mounting use some stand offs, that are high voltage rated, to hold the ceramic tube off the substrate, and do not apply any stress to the body of the high voltage resistor that can crack it.

author: fzabkar
author_rank: Super Contributor
timestamp: January 10, 2021, 08:54:14 pm
content: FWIW, I have seen exactly the same thing attached to the EHT output in a Sharp CRT TV. In that case it was a resistor used in a potential divider to sense the EHT voltage. Obviously this is not the current application.

author: axawire
author_rank: Contributor
timestamp: January 14, 2021, 12:16:48 am
content: Thank you everyone for the answers.
Identify connector on Miele dishwasher PCB? - Page 1
Forum section: electronics / repair

author: Circlotron
author_rank: Super Contributor
timestamp: February 04, 2024, 04:10:36 am
content: Title says it all really. It on a small board that has two relays that controls the water heater element.

author: Circlotron
author_rank: Super Contributor
timestamp: February 04, 2024, 04:12:18 am
content: Pic 2

author: Circlotron
author_rank: Super Contributor
timestamp: February 04, 2024, 04:13:00 am
content: Pic 3

author: Circlotron
author_rank: Super Contributor
timestamp: February 04, 2024, 04:13:38 am
content: Pic 4

author: Circlotron
author_rank: Super Contributor
timestamp: February 04, 2024, 04:15:51 am
content: Pic 5
Identify Date Code - Page 1
Forum section: electronics / repair

author: JustMeHere
author_rank: Frequent Contributor
timestamp: August 18, 2020, 07:36:43 pm
content: Can anyone tell me what is the date code on this bulb?

author: bob91343
author_rank: Super Contributor
timestamp: August 18, 2020, 09:36:01 pm
content: It's hard to read but I don't see anything that looks like a date code.

author: fzabkar
author_rank: Super Contributor
timestamp: August 18, 2020, 09:50:10 pm
content: Images of other samples would suggest that the only unique markings are "22H725". That said, I can't see how to decode them.https://duckduckgo.com/?q=philips+35w+d2s+85122&t=opera&iax=images&ia=images

author: Pete66
author_rank: Regular Contributor
timestamp: August 19, 2020, 03:13:47 pm
content: Perhaps the "H7" part is the date code.So August 1987 or 2007 based on this:http://www.lamptech.co.uk/Documents/Codes/Date%20Code%20-%20Philips%20-%201917-Present.pdf

author: JustMeHere
author_rank: Frequent Contributor
timestamp: August 20, 2020, 04:39:04 am
content: Quote from: Pete66 on August 19, 2020, 03:13:47 pmH7 could make sense. It came from an 08 Acura. Says alot for those bulbs if it is. That also means the body shop that repaired that side of the car didn't get a new bulb like they should have.
Identify IC - Battery Package Control - Page 1
Forum section: electronics / repair

author: delgadoBR
author_rank: Newbie
timestamp: March 08, 2023, 01:09:26 pm
content: Hello everybody!I have a battery package with BMS PCB.The circuit I can identify the how works. Have a battery protection and voltage/current control. But have a IC I cannot find in the web. Please, everyone can find the manufacturer or datasheet?Have one call 7900A with logo.And another call XM4056. I think is similar with famous 4056, like TP4056 but the circuit is not the same..Thanks!

author: mariush
author_rank: Super Contributor
timestamp: March 08, 2023, 01:45:35 pm
content: Maybe Si7900A from Vishay :https://www.vishay.com/docs/72287/si7900aedn.pdfDual n-channel mosfet ic.As for xm4056 .. maybe it's 4056 made by other company, maybe with different pinout.There's cl4056 for example :https://datasheet.lcsc.com/szlcsc/ChipLink-Tech-CL4056_C181916.pdf
Identify ic of ELTEK board multicharger 1500 - Page 1
Forum section: electronics / repair

author: HUGOMAN
author_rank: Regular Contributor
timestamp: March 08, 2023, 10:03:56 am
content: HiI have this exploded ic I couldn’t identify, can you see this? thanks.

author: fzabkar
author_rank: Super Contributor
timestamp: March 08, 2023, 09:31:55 pm
content: Could it be a TNYxxx from Power Integrations?

author: max.wwwang
author_rank: Frequent Contributor
timestamp: March 08, 2023, 10:18:45 pm
content: Quote from: fzabkar on March 08, 2023, 09:31:55 pmI suspect that is probably the case -- a part of the flyback converter power supply. The remaining part of the logo looks like that of PI.Recently replaced one of these bad boys on a cloth drier control board. Check if it has only 7 legs.

author: HUGOMAN
author_rank: Regular Contributor
timestamp: March 09, 2023, 07:50:59 am
content: Sure it's a power ic switch but since it is exploded i can't know exactly what reference series, i guess Top223 or 224! Unless if there is photo of this board.

author: HUGOMAN
author_rank: Regular Contributor
timestamp: March 09, 2023, 07:58:14 am
content: I check now TNY seriesTNY266 P or G10 W15 W6 W9.5 WTNY267 P or G13 W19 W8 W12 WTNY268 P or G16 W23 W10 W15 Wmaybe I will try TNY268!

author: fzabkar
author_rank: Super Contributor
timestamp: March 09, 2023, 04:17:07 pm
content: I think the TOPxxx parts are a better fit.Can you find the missing piece of the IC inside the case?

author: HUGOMAN
author_rank: Regular Contributor
timestamp: March 09, 2023, 10:45:03 pm
content: Thanks Mr FzabkarI did not think about thank you, i hope i can find this piece part inside the charger!Regards

author: gamalot
author_rank: Super Contributor
timestamp: March 10, 2023, 01:22:02 pm
content: Quote from: fzabkar on March 09, 2023, 04:17:07 pmCould it be TOP242-250G ?https://datasheetspdf.com/pdf-file/1487931/PowerIntegrations/TOP246/1

author: fzabkar
author_rank: Super Contributor
timestamp: March 10, 2023, 05:46:11 pm
content: Quote from: gamalot on March 10, 2023, 01:22:02 pmLooks good electrically and physically.https://i.ebayimg.com/images/g/LDYAAOSw8elgticH/s-l500.png

author: HUGOMAN
author_rank: Regular Contributor
timestamp: March 11, 2023, 04:44:45 pm
content: Thanks Fzabkar, i will let you know.

author: HUGOMAN
author_rank: Regular Contributor
timestamp: March 13, 2023, 10:37:23 pm
content: HelloThank you Mr Fzabkar. I found in my stock parts the TOP244pn. I removed up the exploded one and I put this top244 works perfectly. But unfortunately there is no voltage in output even I reload factory parameters, so no output voltage!
Identify ic with marking F050 - Page 1
Forum section: electronics / repair

author: spd
author_rank: Contributor
timestamp: December 06, 2019, 07:26:24 pm
content: I need to identify an ic that has 5 pins, three on side, two on the other and has a marking F050, maybe same size as SOT23 but thicker.. This may be a voltage controller and one of the connections is to a rechargeable battery in an audio device, no circuit available.Thanks.

author: fzabkar
author_rank: Super Contributor
timestamp: December 07, 2019, 03:56:11 am
content: It would help to see the part in the context of its surroundings. Then we could infer the date code, if any, and we might get a clue as to the manufacturer of the IC by determining the manufacturers of the other ICs, ie Japanese, Chinese, US."Voltage controller" is a vague term which could mean LDO regulator or step-down buck converter, or battery charger, etc.
Identify integrated circuits SN49730N, SN49829N, SN49840N - Page 1
Forum section: electronics / repair

author: Greybeard
author_rank: Frequent Contributor
timestamp: January 14, 2025, 12:45:30 pm
content: Can anybody identify these integrated circuits, please?

author: Harry_22
author_rank: Frequent Contributor
timestamp: January 14, 2025, 07:40:26 pm
content: Hi!SN49829N = FLH255

author: aeg
author_rank: Regular Contributor
timestamp: January 15, 2025, 01:03:19 am
content: Wow! I never heard of SN49 series. Maybe it was only marketed in Germany?It was covered in a databook, so it's a standard series, not house-numbered parts:https://www.antikvarium.hu/konyv/pocket-guide-901729-0There is some information on a Russian website:http://www.155la3.ru/sn49xxx.htmAccording to the site, SN498xx is the extended-temperature version of SN49xx.Rainer Knaepper posted some scans from the 1979 databook:http://web.archive.org/web/20080620204134/http://www.smial.prima.de/elektronisches.htmlUnfortunately, nothing about SN49730N or SN49840N.

author: Greybeard
author_rank: Frequent Contributor
timestamp: January 15, 2025, 07:02:42 pm
content: Quote from: aeg on January 15, 2025, 01:03:19 amI don't think so, because manufacturer is TI.Siemens TTL are marked FLH, FLJ, FLK, FZH, FZJ...

author: fzabkar
author_rank: Super Contributor
timestamp: January 17, 2025, 01:11:57 am
content: https://www.synfo.nl/datasheets/SIEMENS_1976-1977_%20ANALOG-INTEGRATED-CIRCUITS.pdf4930 = FLH321 = quadruple 2-input NAND-powergateFrom the .ru site (thanks @aeg), 49730 and 49830 are different temperature grades of the 4930.https://web.archive.org/web/20041227065139/http://www.smial.prima.de/download/sn49xxx/sn4930.gif

author: Greybeard
author_rank: Frequent Contributor
timestamp: January 19, 2025, 08:56:10 pm
content: Unfortunately, the Russian website seems to be unavailable (timeout).Maybe blocked by our best friend Wladimir...

author: fzabkar
author_rank: Super Contributor
timestamp: January 19, 2025, 09:00:26 pm
content: Quote from: Greybeard on January 19, 2025, 08:56:10 pmhttps://web.archive.org/web/20240418205721/http://155la3.ru/sn49xxx.htm

author: Greybeard
author_rank: Frequent Contributor
timestamp: January 21, 2025, 11:18:10 pm
content: Thanks to all of you.