hybridfree/eevblog-posts huggingface dataset:
Help identifying SOT23s with marking 6B> - Page 1
Forum section: electronics / repair

author: MC2Short
author_rank: Contributor
timestamp: November 27, 2024, 07:58:08 pm
content: I'm trying to figure out what these are. They are on a Fluke 175. I'm thinking they might be BC817's going by the 6B marking, but the > after is throwing me off. I can't seem to find a 6B> Thanks guys.

author: Poroit
author_rank: Frequent Contributor
timestamp: November 28, 2024, 06:13:12 am
content: G'day MC2sHORT,The > maybe just a manufacturers mark.I think BC817 and the post below may assist you.https://www.eevblog.com/forum/projects/help-to-identify-a-sot23-6-from-its-marking/

author: fzabkar
author_rank: Super Contributor
timestamp: November 28, 2024, 06:34:28 am
content: I think "6B>" is an LBC817-25LT1G (= BC817-25).Here is a listing for an LBC817-40LT1G ("6C>"):https://www.aliexpress.com/item/1005006444969128.htmlhttps://ae-pic-a1.aliexpress-media.com/kf/S487a58780da445fda3ccd467977213d55.jpg(photo of LBC817-40LT1G)https://datasheet.datasheetarchive.com/originals/library/Datasheets-SW12/DSASW00231749.pdf(page 123)

author: MC2Short
author_rank: Contributor
timestamp: November 28, 2024, 10:24:34 pm
content: Thank you
Help identifying surface mount component  - Page 1
Forum section: electronics / repair

author: tatersalad
author_rank: Contributor
timestamp: May 01, 2020, 05:11:11 am
content: I'm working on a handheld ham radio, its lost all audio input. Emergency tone transmits but no audio. I've narrowed it down to be what I believe to be an mic amp but I'm struggling to find the part on the interwebz. I've attached a picture red is the amp and yellow is the mic line into the circuit. I'm completely green to component level stuff kinda self learning with trial and error. I've got a decent bench going just not sure where to probe without a data sheet.. im sure some of you can do this in your sleep so please excuse my water behind my ears im still a baby.

author: DaveMX5mk1
author_rank: Contributor
timestamp: May 01, 2020, 11:20:43 am
content: Could you let us know the make and model number of the radio?That way someone may be able to look it up for you.

author: tatersalad
author_rank: Contributor
timestamp: May 01, 2020, 11:37:16 am
content: Baofeng rd5r its a dmr hand held. I did some probing around with the scope and got some mic signals that look amplified so I've kinda ruled that out, now I'm just trying to figure out how this circuit works so I know what direction to head from here. Another picture with more of the board for more viewing pleasure

author: kawal
author_rank: Frequent Contributor
timestamp: May 01, 2020, 12:00:16 pm
content: The little black parts are most likely ferrite beads. You will have to measure with LCR meter.https://www.mouser.com/ProductDetail/Fair-Rite/2944666671?qs=aTFcLA2DbqtaBOMj3TuIVQ%3D%3D&gclid=Cj0KCQjwka_1BRCPARIsAMlUmErg3a6dkc0tvgX7x_C8IeZ4LyC4OuLXcrxUW0qn0Ya66J-aYTXNsuQaAlj4EALw_wcBhttps://www.mouser.com/ProductDetail/Murata-Electronics/BLM41PG750SN1L?qs=2gBxycr6GKxFWmTD7HVXhQ%3D%3D&gclid=Cj0KCQjwka_1BRCPARIsAMlUmErwtPzG1R1TYBpnXXbwQBfIncxJla5qCQdN8AALjHVPDYB4ZrIVl00aAh21EALw_wcB
help identifying this component. (has been solved, green fuse) - Page 1
Forum section: electronics / repair

author: mookie1590
author_rank: Contributor
timestamp: March 12, 2023, 04:18:50 pm
content: I don't recognize this part, it is in series with a x4 AA battery pack.I assume it some sort of protection.And once Identified, please explain what the numbers mean and how to read and calculate the part. I see a 4 then a f. the last digit looks like an L with a F sitting inside of itThanks!

author: wasedadoc
author_rank: Super Contributor
timestamp: March 12, 2023, 04:23:54 pm
content: 4 Amp fuse?

author: GLouie
author_rank: Regular Contributor
timestamp: March 12, 2023, 04:45:07 pm
content: Looks like a Littelfuse Picofuse, 4A.https://www.littelfuse.com/products/fuses/axial-radial-thru-hole-fuses/pico-fuses.aspx

author: mookie1590
author_rank: Contributor
timestamp: March 12, 2023, 05:17:22 pm
content: Awesome, thanks a ton Y'all. Didnt know that wa a fuse. Know what a SMD fuse is, but didnt know this was one. Should have been obvious with the way its in series.Dont see a way to close this thread as complete either.

author: Gyro
author_rank: Super Contributor
timestamp: March 12, 2023, 05:47:36 pm
content: You don't close threads here. They stay for other people to reference or add further comments.Edit: Occasionally people edit the title in the first post to stick  on the end, but the most don't.

author: mookie1590
author_rank: Contributor
timestamp: March 12, 2023, 09:20:46 pm
content: Thank you for the information.Id edit and say solved so people can know that there is an answer. so they can know to look here and not waste time.I like the idea of not closing the thread. There has been many times in the past where I want to comment on a solved thread for further information.
Help identifying this part - AJZN - Page 1
Forum section: electronics / repair

author: daisizhou
author_rank: Super Contributor
timestamp: September 05, 2024, 01:07:48 am
content: This part comes from a communication module of a Yamaha motorcycle.Check the PCB circuit board,Found 2 components with the symbol "AJZN 729", but don't know the exact model and manual information.If anyone knows please tell me, thanks

author: fzabkar
author_rank: Super Contributor
timestamp: September 05, 2024, 01:44:08 am
content: Wrong package.MPQ2013DGJE-33-AEC1https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MPQ2013DGJE-AEC1/MPQ2013AGQ-33-AEC1-Zhttps://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MPQ2013A-AEC1/document_id/3764

author: daisizhou
author_rank: Super Contributor
timestamp: September 05, 2024, 02:20:23 am
content: Thank you so much
Help identifying this smd fuse - Page 1
Forum section: electronics / repair

author: artvandalai
author_rank: Regular Contributor
timestamp: October 03, 2024, 02:53:57 pm
content: Making this thread again, I need help identifying this smd fuse on a Philips sonicare pcb so I can order the correct part from digikey. I believe i blew the fuse attempting to fix another part of the board as it shows no continuity on the multimeter. I thought i bought the correct fuse but it was much bigger than the one I needed. I currently dont have a micrometer caliper to measure correctly. The fuse is next to a 1206 littlefuse 3.18mm x 1.52mm and a PTS815 SJG 250 SMTR LFS tactile switch 4.20mm x 3.20mmhttps://ibb.co/V2vFdGqhttps://ibb.co/QFS4xrb

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 03, 2024, 03:01:19 pm
content: littel "467003." ?I am not sure if it is really a littelfuse. Various manufacturers make similar fuses.

author: thm_w
author_rank: Super Contributor
timestamp: October 03, 2024, 10:51:59 pm
content: You can just use your existing thread:https://www.eevblog.com/forum/repair/help-identifying-this-smd-fuse/Its going to be 0603 or 0805. You can compare to the FETs and measure those in Paint, or some other component that you can identify.The 1206 will fit as well if you put some effort to mod it.
Help identifying this smd fuse - Page 1
Forum section: electronics / repair

author: artvandalai
author_rank: Regular Contributor
timestamp: September 19, 2024, 07:25:47 pm
content: I need help identifying this smd fuse on a Philips sonicare pcb so I can order the correct part from digikey. I believe i blew the fuse attempting to fix another part of the board as it shows no continuity on the multimeter.https://ibb.co/2t1SQzX

author: fzabkar
author_rank: Super Contributor
timestamp: September 19, 2024, 07:41:59 pm
content: Possibly a 3A fast acting fuse:http://www.farnell.com/datasheets/48294.pdf

author: wraper
author_rank: Unknown
timestamp: September 19, 2024, 07:53:31 pm
content: While it may be a regular fuse, often it's polyfuse (resettable fuse) in such package. Looking on it sideways and on the bottom will reveal which one it is. Polyfuse usually have the same marking on both sides and exposed copper layers can be seen on its edges. Normal fuse likely will have trace on the bottom side, no copper layers visible on edges.

author: artvandalai
author_rank: Regular Contributor
timestamp: September 19, 2024, 08:51:26 pm
content: Its too small for me to see clearly and I currently dont have a microscope for this. I believe it is resettable as this videohttps://youtu.be/o6ZyJ-hzpHo?si=C5uvK8lSVk0Xi839states the fuse on this sonicare model, mine is a different model, is a resettable fuse.
Help Identifying this SSOP4 - Page 1
Forum section: electronics / repair

author: Ingineer
author_rank: Contributor
timestamp: May 13, 2024, 04:55:08 am
content: I have 2 boards about a year apart with these SSOP4s which I believe are opto-isolators. One is marked "1 [] 724" and the other is "1 [] 648" like this: (So I believe the 3 digit must be the date code)Can anyone come up with a datasheet? I suspect the board is applying too much voltage across the output.

author: fzabkar
author_rank: Super Contributor
timestamp: May 13, 2024, 05:07:31 am
content: PS2801-1, HIGH ISOLATION VOLTAGE SSOP PHOTOCOUPLER, SSOP-4:https://datasheet.octopart.com/PS2801-1-A-NEC-datasheet-30209.pdf(California Eastern Laboratories)https://www.renesas.com/us/en/document/dst/ps2801-1-ps2801-4-data-sheet(Renesas)http://markingcodes.com/search/c/1https://www.ebay.com/itm/374575322836(photo)

author: Ingineer
author_rank: Contributor
timestamp: May 13, 2024, 05:13:23 am
content: Thank you, Awesome!
Help identifying this tactile switch - Page 1
Forum section: electronics / repair

author: artvandalai
author_rank: Regular Contributor
timestamp: July 26, 2024, 02:58:50 am
content: I need help identifying this tactile button on a Philips sonicare pcb so I can order the correct part from digikey.https://ibb.co/52K09sfhttps://ibb.co/FmhFyN2

author: rich t
author_rank: Contributor
timestamp: July 26, 2024, 03:10:41 am
content: I use these which look close:https://www.mouser.com/datasheet/2/240/pts815-3050953.pdfNote you can get different colors and different activation forces and heights -- not sure if that matters to you.Or from digikey:https://www.digikey.com/en/products/detail/c-k/PTS815-SJM-250-SMTR-LFS/9947846

author: rich t
author_rank: Contributor
timestamp: July 26, 2024, 03:24:11 am
content: And I think the "G" option is actually black with higher activation force (despite the picture):https://www.digikey.com/en/products/detail/c-k/PTS815-SJG-250-SMTR-LFS/9947852
Help Identifying Unmarked Component - Page 1
Forum section: electronics / repair

author: fmashockie
author_rank: Frequent Contributor
timestamp: October 28, 2023, 03:15:56 am
content: Hey y'all I need some help identifying these unmarked components (see photos attached. 2nd one they are circled in blue). They are on a gel electrophoresis power supply I am trying to repair (make/model E-C Apparatus Corp, EC570). It is a power supply that can get up to 250VDC/2.5A and 500VDC/1.25A. It was manufactured in the mid-1980s if that helps. They both test short, but I'm not sure if they are suppose to be like that or not. Any help would be greatly appreciated!

author: Nusa
author_rank: Super Contributor
timestamp: October 28, 2023, 06:08:57 am
content: That PCB layout suggests the 70's or early 80's.Can't see...two leads? My guess would be a varistor. But draw the circuit around it and see if that makes sense.

author: DavidAlfa
author_rank: Super Contributor
timestamp: October 28, 2023, 06:19:34 am
content: Probably filtering inductors... Check if a magnet sticks to them.

author: fmashockie
author_rank: Frequent Contributor
timestamp: October 28, 2023, 01:03:22 pm
content: Quote from: Nusa on October 28, 2023, 06:08:57 amPCB looks like it is from the mid-80s based on date codes from the other components. And they both have two leads!Quote from: DavidAlfa on October 28, 2023, 06:19:34 amI will give that a try - thanks!
Help identifying voltage regulator on this concept 2 pm5 monitor pcb board?  - Page 1
Forum section: electronics / repair

author: artvandalai
author_rank: Regular Contributor
timestamp: November 05, 2024, 01:17:54 pm
content: This Concept 2 rower pm5 monitor doesn't shut down. It keeps turning on and stays on after being turned off. I read on another forum by another user that replaced the same component to check the voltage regulator.The monitor should pull around 35mA when turned on and in shutdown it should drops to around 0.060mA. Any advice on finding the voltage regulator on this board to check if it needs to be replaced?https://imgur.com/a/Yo217Fr

author: artvandalai
author_rank: Regular Contributor
timestamp: November 12, 2024, 05:07:11 pm
content: Bump
Help Identifying/Substituting Component for PWM Treadmill Motor Controller fix - Page 1
Forum section: electronics / repair

author: Martin How
author_rank: Newbie
timestamp: February 01, 2021, 07:21:54 pm
content: I am am repairing the controller board for my treadmill. The design is old and fairly simple (its an old simple treadmill) with what appears to be a PWM controller and a Mosfet chopper circuit fed from a UTC3843 pwm controller chip from the panel.The board died with a flash and a loud bang and the PCB Fuse vaporised but did not bloe the 13 amp plug or house MCB or RCD.The mains bridge rectifier and Mosfet are short, and flyback diode is open circuit.The input rectifier (GBJ1512) is available but I have failed to find the Mosfet (JCS18N50WH) but a 22N60 appears similar with a slightly higher current rating, but can't find a data sheet for the flyback diode which is an MUR1070 made by WXDH in China. Plenty of other MURs and WXDH have a website but no MUR1070. Its a single diode in a TO-220 package and looks like its rated at 5 amps ish. I have tried WXDH, Google and a couple of cross reference sites but no joy.The motor runs at 230v 3.5A 600w. Does this need to be a Schottky device and can anyone help me with a suitable replacement part number/spec?Thanks,

author: fzabkar
author_rank: Super Contributor
timestamp: February 01, 2021, 07:31:26 pm
content: http://www.szryc.com/plus/view.php?aid=678MUR1070, TO-220AC, 700V, 10A，VF：1.45V，Trr：35ns

author: Martin How
author_rank: Newbie
timestamp: February 01, 2021, 09:43:44 pm
content: Thank you. This seems to be a fast recovery diode - something entirely new to me, but i am sure that one of the component suppliers will come up with something suitable.Martin
HELP I'm looking for an Agilent DSO-X 2002A LCD - Page 1
Forum section: electronics / repair

author: Wahyueko
author_rank: Contributor
timestamp: October 15, 2022, 04:30:31 pm
content: Does anyone sell LCD oscilloscope Agilent DSO-X 2002A?I looked for the LCD but couldn't find the seller.

author: CapLeaker
author_rank: Regular Contributor
timestamp: October 15, 2022, 05:31:50 pm
content: Call Keysight and talk to a tech there… I’ve had good luck with them as they were able to identify who made the PSU (3rd party). At the end I was able to repair my PSU. But in your case you do need a new screen. Figuring out that the PSU in these are 3rd party, I wonder if the screen is too!? If you are able to get a new screen, then get also a new main filter cap for the PSU. Mine wasn’t the only one having a shorted main filter cap.
Help in Fixing the Circuit for a DC Motor with Rechargeable battery - Page 1
Forum section: electronics / repair

author: saaluc
author_rank: Contributor
timestamp: February 07, 2025, 04:35:27 am
content: Hi friends of electronicsWhat you see in the attached pictures is a circuit for a DC motor with a rechargeable 3.6V battery (3 NiMH batteries in series).When the Circuit was OK, its green LEDs lit up one at a time to show that the battery has charged more. But now that the circuit is flawed, LEDs light up this way: just the intensity of their light increases and decreases. When the light is more intensive, the voltage applied to the battery becomes 5.9, when the light is weaker, the voltage applied to the battery suddenly becomes 4.8 and decreases to 4.3; again the voltage becomes 5.9 and after a couple of seconds becomes 4.8 and decreases to 4.3, and so on and on (I took a video of the LEDs behaviour. Tell me to upload it if you need it). (I have another similar circuit which now works well, in which the voltage applied to the battery changes very very rapidly between 4.3 and 5.3 volts so that the digits on the voltmeter are hardly readable).Another problem of the Circuit is that it is unable to run on battery alone (it only runs when the charger is plugged).What is wrong with the circuit?
help in identifying an smd MOSFET - Page 1
Forum section: electronics / repair

author: egirland
author_rank: Contributor
timestamp: March 31, 2022, 03:46:03 pm
content: Can anybody help me in identifying this mosfet?It was in a Blue & Me car board. Attached an attempt to reverse engineer part of application circuit:Thank you very much for your help.Ciao.Emanuele.

author: charlyd
author_rank: Frequent Contributor
timestamp: March 31, 2022, 03:59:19 pm
content: IRF7484Qhttps://www.alldatasheet.com/datasheet-pdf/pdf/191011/IRF/IRF7484Q.html

author: rob77
author_rank: Super Contributor
timestamp: March 31, 2022, 04:00:42 pm
content: the part number is directly on the packagejust use google next time

author: charlyd
author_rank: Frequent Contributor
timestamp: March 31, 2022, 04:02:13 pm
content: @rob77...whaaaaaaaaa....i am happy to help somebody but not many do that here.

author: egirland
author_rank: Contributor
timestamp: March 31, 2022, 06:00:53 pm
content: Thank you very much indeed Charlyd!I googled A326 .. and didn't find anything (now I now why!).bye

author: BrokenYugo
author_rank: Super Contributor
timestamp: March 31, 2022, 06:59:31 pm
content: Always try every line, there's no real standard for which line is which.
Help in identifying part - Page 1
Forum section: electronics / repair

author: DThodoris
author_rank: Newbie
timestamp: November 13, 2020, 04:11:10 am
content: Hi, can somebody help me with this part?I cant find the part number...It is a TO-263 package.Thanks!

author: fzabkar
author_rank: Super Contributor
timestamp: November 13, 2020, 04:52:38 am
content: MTD3055V, ON Semi, N-ch power MOSFET, 60V, 12A, 100mOhm, DPAK:https://www.onsemi.com/pub/Collateral/MTD3055V-D.PDF
Help indentifying a SMD T1 component - Page 1
Forum section: electronics / repair

author: Judder
author_rank: Newbie
timestamp: December 17, 2019, 03:14:34 pm
content: Hi everyoneFirst post from me so I hope you are all well!I'm trying to replace what I think is a transistor on a Japanese manufactured car engine boost controller (it's like a mini-computer) and wondered if anyone can help me with the identification of _what_ the original component is I need to replace.On the PCB it is labelled 'T1' (top right corner of the photo) and has 5 inputs and 5 outputs so I'm guessing it's a transformer, but I can't seem to find any reference to the markings '386 Yf' so a little in the dark with what it isFrom the shape it's 99.9% a coil on top of a PCB so inductor or transformer, and not a radial capacitor as there are more than two input / outputsAny thoughts much appreciated!Kindest regardsAlex

author: TheMG
author_rank: Frequent Contributor
timestamp: December 17, 2019, 07:24:48 pm
content: That's definitely a transformer. Probably a custom part, as a lot of such transformers tend to be, wound specifically for the required primary and secondary voltages required in that specific application.Are you sure it's bad? Open or shorted windings?

author: Judder
author_rank: Newbie
timestamp: December 18, 2019, 12:38:31 pm
content: Quote from: TheMG on December 17, 2019, 07:24:48 pmGreat - many thanks for the reply and yes good to know that I'm not a million miles away with my guess work!It's definitely bad as when I went to see why the board wasn't working, the top coil part literally fell off the bottom silicon part - almost as if it got so hot over time and just cracked, thus separating the connector wires from the PCB part to the coil partI have another board with the same part on - is there any easy way to check the outputs - I'm guessing I could meter them or check the various resistances to try and calculate what the outputs would / could be from those?

author: Judder
author_rank: Newbie
timestamp: December 18, 2019, 06:21:54 pm
content: Here's a couple of extra images - I'm guessing from the 'Warning 75V' that one of the outputs of the transformer generates 75V and you can see on the PCB where it melted itself in - luckily PCB tracks seem fine
help laptop motherboard thomson NEO14A-4sl64 - Page 1
Forum section: electronics / repair

author: mabar
author_rank: Newbie
timestamp: December 14, 2024, 10:45:00 am
content: Hello,The motherboard has undergone a polarity inversion.This short-circuited the 100µF tantalum.After replacement, the A7SHB mosfet burned.After replacement, everything works except the battery charge.I made the partial diagram of the motherboard around the charging chip.I took the voltages around the BQ735 chip, see photos.I don't see anything abnormal on the voltages except ACDRV which is not boosted, I have 6.6v instead of ~18V normally?I suspect a chip defect?Here is my question:but I also have a connection between Q1 and Q2 which goes to mosfets can they intervene in blocking the charge?thank you
Help Latch IC # 93L34PC in HP LCR Meter - Page 1
Forum section: electronics / repair

author: sampler1
author_rank: Regular Contributor
timestamp: May 02, 2022, 07:08:34 pm
content: Hi All,I have been looking around in Canada for some 93L34PC IC's but so far I am unable to find any. I have no idea how I could check this Logic IC . Could someone clue me in on testing this device. I have never tested a logic IC. lots of background in Electronics but this is a black hole. I have the data sheet and Ill post the 1st page here.Sorry for the lame request.Thanks in advance.

author: factory
author_rank: Super Contributor
timestamp: May 02, 2022, 07:23:17 pm
content: Looks like your in luck, the 54LS259 & 74LS259 are the TI equivalent to the 9334 93L34 and seem to be easier to obtain.David

author: sampler1
author_rank: Regular Contributor
timestamp: May 03, 2022, 08:57:47 pm
content: Thanks so so much Dave !!

author: sampler1
author_rank: Regular Contributor
timestamp: May 03, 2022, 11:40:57 pm
content: David ,Just curious , how or maybe I should say where did you find the cross reference to that latch?Again ThanksGarry

author: fzabkar
author_rank: Super Contributor
timestamp: May 03, 2022, 11:52:45 pm
content: My IC Substitution Manual (1990) lists the following as substitutes for the 9334:National DM9334Signetics N9334, S9334

author: factory
author_rank: Super Contributor
timestamp: May 04, 2022, 06:52:36 pm
content: Quote from: sampler1 on May 03, 2022, 11:40:57 pmWith a bit of web searching, link herehttps://datasheet.datasheetarchive.com/originals/scans/Scans-106/DSASCANS15-37816.pdfEdit: Bit more searching and found the same pages in the 1978 Fairchild TTL databook, pages 421 (74259) & 620 (9334) of this pdf;https://usermanual.wiki/Document/1978FairchildTTLDataBook.2136441351/viewSearching for that again, I note Sphere in Canada have a Tek 156-0544-00 (aka 93L34), no idea how old it is though.https://www.sphere.bc.ca/test/tek-parts/tekparts4.htmlOut of interest, which HP LCR meter is this from?David

author: sampler1
author_rank: Regular Contributor
timestamp: May 04, 2022, 11:15:35 pm
content: The problem is; HP 4261A LCR Meter.Someone removed a board full of logic chips and with a Hot Air gun and took all the chips out. He heated the board so much that in some places it is burned a bit. With a TL866 II programmer I found almost 90% of the logic Ic's no good. I figure it is from over temp. The guy who did this installed IC sockets all over the PCB , so at least one good thing. I am still waiting for 3 IC's ( 93L34PC) and then I will be able to see if there is any other problems..well, back to the drawing board.Have a good one !
Help locating service manual - Page 1
Forum section: electronics / repair

author: dENc58
author_rank: Newbie
timestamp: May 07, 2020, 03:38:37 am
content: Hi to allI am new to the forum and I need some helpI have pulled out an old oscilloscope from storage and want to repair it, but I need a service manual or at least a schematic for itit is made by Soar Corporation, model number is MS-6020I managed to find an operating manual for a similar series of scopes but no sevice infoThe scope is functional but needs some workCan anybody help

author: harveyradar
author_rank: Contributor
timestamp: May 07, 2020, 12:19:31 pm
content: the MS-6020 is very similar to scopes likeAARON / APPLICATION BS-615 BS-310 BS-612 BS-620 BS-625 & the HUNG CHANG OS-650the two big clues are the layout and the same CRT part numberif you google image search on"BS-612" oscilloscopeyou will find a series of schematic images fromwww.radiomuseum.orgwhich I believe will be very similar to what you have.Harvey

author: dENc58
author_rank: Newbie
timestamp: May 07, 2020, 05:58:50 pm
content: Thanks for your help Harvey,The pictures do indeed look like my scope. Unfortunately the pictures on the Radio museum website are small unusable PNG images of the schematics. Fortunately, once you pointed me in the right direction I was able to find useable schematics on the BAMA website.Thanks again
Help locating some parts - Page 1
Forum section: electronics / repair

author: Sjames105
author_rank: Newbie
timestamp: February 19, 2020, 02:20:15 am
content: I need help. . I'm guessing some of the best minds do as well. I am having difficulties finding some components for my tankless water heater. I won't mention the name but they aren't any help, all they want to sell me is the full control board. All I need is a triac and a relay. Problem is I cant find a supplier for either. The triac is made by Jiangsu JieJue Microelectronics, # JST417 800BW 801 188, The relay is a PICKER PTRD-1A-5SF-1-X. Coil 5v. 40A 240vac. This is a board mounted relay so size matters. If anyone knows where I can source these or a direct replacement I would sure appreciate it. Thanks, and sorry for interrupting the video.

author: SpecialK
author_rank: Regular Contributor
timestamp: February 19, 2020, 02:30:50 am
content: That's JST41Z. It seems to be available from LCSC.

author: WattsThat
author_rank: Frequent Contributor
timestamp: February 19, 2020, 02:42:47 am
content: Bog standard footprint relay. They look like private labeled Chinesium.https://images-na.ssl-images-amazon.com/images/I/A1xTgpgcNvL.pdf

author: Sjames105
author_rank: Newbie
timestamp: February 19, 2020, 03:44:23 am
content: I'll have to do a search on that and see, thanks

author: fzabkar
author_rank: Super Contributor
timestamp: February 19, 2020, 04:12:27 am
content: Picker has a Texas address …Wouldn't any 40A, 800V, 50mA Triac suffice?

author: Sjames105
author_rank: Newbie
timestamp: February 19, 2020, 02:22:16 pm
content: I have sent picker a request for a quote since it doesn't appear to have an online store. Thanks

author: Sjames105
author_rank: Newbie
timestamp: March 01, 2020, 11:43:44 pm
content: Success, I have located all I needed, thanks to all who helped
Help me! E3632a error - Page 1
Forum section: electronics / repair

author: qnhn90
author_rank: Contributor
timestamp: December 02, 2019, 01:27:34 pm
content: Dear all!I have E3632a error:1 PCB have Unreg , when power on , only CV display , don't have CC . Everything ok ( Not have error like 625 - I/O Communication Error)- 2 PCB when power on have long beep . Beep ..beep in 2 second . Display won't work- 1 PCB brokent input but we have any part in good condition to replace for Error PCBPls help me to repair and guide to me how to step by step check and fix it.

author: LateLesley
author_rank: Frequent Contributor
timestamp: December 06, 2019, 02:13:20 am
content: Hello. I think the first step is to get the service manual, and go through the troubleshooting steps.http://literature.cdn.keysight.com/litweb/pdf/E3632-90010.pdfpage 65.
[FIXED] help me find a 7-segment LED display - Page 1
Forum section: electronics / repair

author: TheMG
author_rank: Frequent Contributor
timestamp: August 24, 2021, 12:11:36 am
content: LED 7-segment temperature display for a wine refrigerator, has several segments not working so I'm trying to find a replacement. At first glance seems like a bog standard two-digit 7-segment display, but the pinout is unlike anything I can find that is readily available!LG4021AHOnly relevant hit on google is this Chinese manufacturer's site:http://www.yxkd.com/product_txt.asp?pl=720I'd like to avoid having to bodge in a display with a totally different pinout, but that might be what it comes down to...

author: WattsThat
author_rank: Frequent Contributor
timestamp: August 24, 2021, 12:30:11 am
content: This is honestly the first link I checked on eBay:https://www.ebay.com/itm/143089482733Single pieces:https://www.ebay.com/itm/253205048535

author: TheMG
author_rank: Frequent Contributor
timestamp: August 24, 2021, 05:12:04 pm
content: Thanks, that's a fitting replacement but unfortunately there's a time constraint and this is shipping from China no way I would ever receive it in time (China to Canada shipping often takes a couple weeks, sometimes over a month if customs decides to take their time).Guess I'll get one off Digikey and mod-wire it on.

author: james_s
author_rank: Super Contributor
timestamp: August 24, 2021, 06:50:48 pm
content: You could contact the seller and ask if they're willing to use a faster shipping service. They are probably used to dealing with cost-sensitive customers but if you're willing to pay for it they might use DHL or whatever.

author: tooki
author_rank: Super Contributor
timestamp: August 29, 2021, 03:55:41 pm
content: I’d also check to see if the LED driver is actually working on the failed segments. No sense in replacing an unusual display if it’s actually the driver that’s gone bad.

author: TheMG
author_rank: Frequent Contributor
timestamp: August 29, 2021, 09:29:56 pm
content: Directly driven from a small microcontroller.That was the first thing I checked whether it was actually the LED display or not. Found several segments shorted.Anyways, I ended up getting a SMD 7-seg display from Digikey and using mod wire the make the connections to the appropriate pins, a little hot snot to hold it in place, good as new.Didn't want the headache of trying to get the exact replacement from China plus I'm skeptical of the original part's quality. Based on the resistor values and supply voltage, it is being driven at 10mA peak per segment, 5mA average (the two digits are multiplexed), well below the datasheet ratings so there's really no reason those segments should have ever shorted.

author: james_s
author_rank: Super Contributor
timestamp: August 30, 2021, 05:13:59 am
content: If I had to guess, I'd say probably ESD damage, or possibly just a bad run of parts. Some of that cheap Chinese stuff is a crapshoot, you might get excellent quality or you might get crap.
Help me find datasheet/info - Page 1
Forum section: electronics / repair

author: CrazyTiger
author_rank: Regular Contributor
timestamp: June 10, 2022, 10:55:19 am
content: Hi,I came across this part on a paging system, i believe its dead, can someone point me to a datasheet or info.This is a DC-DC converter, in the past I have seen similar Brandner with different model number, which I could not find a datasheet either, but for that case I had the circuit diagram, so I manage to find a equivalent replacement. Will take a picture of the part later.Part Name:Brandner SR0 8A105
help me find ob5284cp pwm ic or equivalent - Page 1
Forum section: electronics / repair

author: 800908
author_rank: Contributor
timestamp: December 06, 2020, 06:30:11 am
content: hithis ic is belongs to TV power supply and I can not find datasheet for it.the part number on is ob5284cp.pin 4 is ground and pin 7 is Vcc.it controls 7 Amper mosfet.I am looking for common pwm that can be found easily.thanks.

author: amyk
author_rank: Super Contributor
timestamp: December 06, 2020, 07:11:37 am
content: Pin7, are you sure?OB5269 looks similar:http://www.on-bright.com/cn/english/products_Ultra_low.htmBut you could try asking Onbright about the OB5284 yourself... they might even be willing to send you a sample!

author: 800908
author_rank: Contributor
timestamp: December 06, 2020, 07:21:08 am
content: as you can see in this picture after I took off the bad components pin 7 is connected to positive of caps. so it should be Vcc I think.

author: picburner
author_rank: Frequent Contributor
timestamp: December 06, 2020, 07:42:04 am
content: The pin connected to positive of cap is 6, pin 7 is not connected.

author: 800908
author_rank: Contributor
timestamp: December 06, 2020, 08:31:31 am
content: oooh. I am so sorry. I am counting the top pins from left!so are you sure that ob5269cp is the equivalent because if I order this I have to wait a week.

author: amyk
author_rank: Super Contributor
timestamp: December 07, 2020, 12:31:58 am
content: No, I am saying it look similar in pinout, but other specifications could be (very) different.

author: 800908
author_rank: Contributor
timestamp: December 07, 2020, 05:45:47 am
content: OK. thanks.the Onbright peoples didn't answer my email yet!

author: 800908
author_rank: Contributor
timestamp: December 07, 2020, 06:17:13 am
content: Quote from: amyk on December 07, 2020, 12:31:58 amsorry to bother you again.on that picture the value of big resistor should be less than one ohm but two apps I use on my phone show different.they say 24.9 ohm.is it right?

author: picburner
author_rank: Frequent Contributor
timestamp: December 07, 2020, 08:35:06 am
content: Most likely it is a fusible resistor.0.24 ohm, 5%. Thepurpleviolet color should indicate the tripping time as fuse.

author: 800908
author_rank: Contributor
timestamp: December 17, 2020, 09:17:51 pm
content: Quote from: amyk on December 06, 2020, 07:11:37 amhitoday finally theob5284cpob5269cp arrived and it's working.thanks for helping me.

author: amyk
author_rank: Super Contributor
timestamp: December 17, 2020, 10:19:54 pm
content: So OnBright actually sent you a sample of ob5284, or did you buy one from them?

author: 800908
author_rank: Contributor
timestamp: December 18, 2020, 06:19:37 am
content: No. Onbright not even answer my two emails.i find it on local website.

author: 800908
author_rank: Contributor
timestamp: December 18, 2020, 08:34:29 am
content: Quote from: amyk on December 17, 2020, 10:19:54 pmsorry by mistake I said ob5284cp arrived but actually I ordered ob5269cp from local website and I put it on the board and it working fine.
Help me find these connectors  - Page 1
Forum section: electronics / repair

author: sorivanu
author_rank: Newbie
timestamp: July 07, 2023, 09:13:25 am
content: Hello,I want to repair a module and I have to change the power connectors. Maybe someone knows how to find them (see pictures).The diameter is 10mm, the male connector have a locking position and cannot be accidentally disconnected.Thank you!

author: sorivanu
author_rank: Newbie
timestamp: July 08, 2023, 05:52:56 pm
content: Found it:KPJX-3S-SKPPX-3P
Help me find this TRIAC controller - Page 1
Forum section: electronics / repair

author: stcoso
author_rank: Regular Contributor
timestamp: June 27, 2022, 12:27:09 pm
content: Hi, I have a single phase triac motor controller board with the controller IC that is dead. The problem is that this 14 pin DIP IC is probabily a very old part (i've talked with the very EE that designed and built this board) has no markings. The EE doesn't remember the part number and doesn't have the schematics... so i'm a little bit stuck with the repair.Any suggestion?

author: capt bullshot
author_rank: Super Contributor
timestamp: June 27, 2022, 12:33:24 pm
content: Maybe TDA1185 or TDA1085

author: stcoso
author_rank: Regular Contributor
timestamp: June 27, 2022, 12:38:55 pm
content: Unfortunately nor 1085 nor 1185 suits the circuit. Gate pulse is on PIN2 (like 1185) but in my circuit pin 3 and 5 are used (and in 1185 are not connected). On 1085 pulse output is on pin 13 (which is not connected on my board)

author: capt bullshot
author_rank: Super Contributor
timestamp: June 27, 2022, 01:38:44 pm
content: Quote from: stcoso on June 27, 2022, 12:38:55 pmNext (and probably) last one I remember: TCA785 - but apparently it doesn't match your pins, too.

author: stcoso
author_rank: Regular Contributor
timestamp: June 27, 2022, 03:32:05 pm
content: It's probably a TLE3102...

author: floobydust
author_rank: Super Contributor
timestamp: June 27, 2022, 10:39:03 pm
content: A different (16-pin) Atmel U2010B motor control IC, discussed in this threadhttps://www.eevblog.com/forum/reviews/2021-craftsman-bench-jointer-cmew020-help-me-reverse-engineerhack-this-please/The original IC was made by Temic, so I would check their old product lines.
Help me identify component - Page 1
Forum section: electronics / repair

author: jimmyblacksmith
author_rank: Newbie
timestamp: February 26, 2024, 02:01:13 am
content: Hi,This circuit is a 240 volt motor speed controller. There's a missing component (blank space above the triac), which looked like a zener diode, but it melted, so I can't identify it. I've tried diodes, thermistors, and diacs, but the motor only runs at top speed, or not at all. Can anyone tell me what the missing component should be?

author: Kim Christensen
author_rank: Super Contributor
timestamp: February 26, 2024, 02:59:15 am
content: Usually it's a DIAC on the gate of the TRIAC:

author: MathWizard
author_rank: Super Contributor
timestamp: February 26, 2024, 03:02:30 am
content: Was this a through hole or SMD part ? I guess most THH zeners are the glass type, so was it some SMD part that got toasted ?I've done a couple of things with Triac's but not enough to know what was there. There's also Diac's that come up in these circuits, don't they get used sometimes to turn on Triac's ?If it had any digital controls, it would probably use a high voltage opto-isolator for triggering or whatever it's called.

author: jimmyblacksmith
author_rank: Newbie
timestamp: February 26, 2024, 03:26:03 am
content: That was my conclusion after looking at some other circuits. I couldn't get it to do anything other than top speed though.

author: jimmyblacksmith
author_rank: Newbie
timestamp: February 26, 2024, 03:27:41 am
content: Through hole part. Really simple circuit, with no SMD. It was a glass component.

author: jimmyblacksmith
author_rank: Newbie
timestamp: February 26, 2024, 03:28:54 am
content: Correction to the diagram.

author: MathWizard
author_rank: Super Contributor
timestamp: February 26, 2024, 03:41:26 am
content: Yeah Diac's are also semi-conductor's and often in glass it seems.

author: Kim Christensen
author_rank: Super Contributor
timestamp: February 26, 2024, 05:33:42 am
content: Quote from: jimmyblacksmith on February 26, 2024, 03:26:03 amIt's highly possible that the TRIAC is shorted since the DIAC was completely cooked.With the circuit unpowered, put an ohm meter across the main terminals of the TRIAC. It should read open in both directions. Do the same with the capacitors which should also read open.

author: jimmyblacksmith
author_rank: Newbie
timestamp: February 26, 2024, 05:36:25 am
content: I've replaced the Triac, which was actually fine. I've also replace C1 which leaked a little when I put 500v across it. All other components test fine. With a diac in place I now have an open circuit.

author: eurgenca
author_rank: Regular Contributor
timestamp: February 26, 2024, 06:05:53 am
content: Oh thanks god. We only have one triac and diac.

author: eurgenca
author_rank: Regular Contributor
timestamp: February 26, 2024, 06:42:32 am
content: Maybe this will helphttps://www.electronicshub.org/triac/
RESOLVED -Help me Identify INY180Pxx from Franke Induction Cooker control board  - Page 1
Forum section: electronics / repair

author: Dutch
author_rank: Newbie
timestamp: April 13, 2022, 02:29:13 am
content: Hello all,I'm living in a remote area of the Philippines having moved here from Manila bringing our 3 plate 7200Watt induction cooker. Likely caused by instability of the Island power provisioning, the cooker blew up with quite a load 'bang'. The chip INY180P of unknown manufacturer is blown up and renders the appliance worthless.Franke only offers a replacement board for -you guess it- an exorbitant amount of money.Please help me identify and source this component.Many thanks!Dutch

author: free_electron
author_rank: Super Contributor
timestamp: April 13, 2022, 03:37:48 am
content: power integration. owned by Texas instrumentshttps://www.power.com/?segment=noneand the correct part number is TNY180P , not INY180https://www.aliexpress.com/item/1005004079434337.html?_randl_currency=USD&_randl_shipto=US&src=google&src=google&albch=shopping&acnt=708-803-3821&slnk=&plac=&mtctp=&albbt=Google_7_shopping&albagn=888888&isSmbAutoCall=false&needSmbHouyi=false&albcp=9594035441&albag=102695258807&trgt=1478211641016&crea=en1005004079434337&netw=u&device=c&albpg=1478211641016&albpd=en1005004079434337&gclid=Cj0KCQjwxtSSBhDYARIsAEn0thTG2KcTD-kURnGE9iMDyn_QZRUPVnM4pL4gicCOVI51K3GfrPPKeRAaAtrnEALw_wcB&gclsrc=aw.ds&aff_fcid=d49374273bc44ff5b7356205bf9eeea9-1649821236430-03972-UneMJZVf&aff_fsk=UneMJZVf&aff_platform=aaf&sk=UneMJZVf&aff_trace_key=d49374273bc44ff5b7356205bf9eeea9-1649821236430-03972-UneMJZVf&terminal_id=380ae3e622ff4d66adab4e1be05f30c8&afSmartRedirect=y

author: fzabkar
author_rank: Super Contributor
timestamp: April 13, 2022, 03:47:34 am
content: TNY180P, Power Integrations, Energy Efficient, Offline Switcher with Enhanced Flexibility and Extended Power Range, DIP-8C:https://4donline.ihs.com/images/VipMasterIC/IC/POIN/POIN-S-A0011956930/POIN-S-A0011956930-1.pdf

author: cozza
author_rank: Regular Contributor
timestamp: April 13, 2022, 08:22:01 pm
content: Get some spares if your power is bad. These devices are the canary in a coal mine.

author: Dutch
author_rank: Newbie
timestamp: April 14, 2022, 03:00:34 am
content: Amazing how quick you guys responded with corrected information. I already ordered the part with spares and cross my fingers the appliance will be as good as new !Thanks everyone!
Help me identify these encoders - Page 1
Forum section: electronics / repair

author: alpher
author_rank: Frequent Contributor
timestamp: January 28, 2022, 10:48:21 pm
content: A couple of pics, maybe someone will recognize at least manufacturer.Much appreciated.

author: Testtech
author_rank: Regular Contributor
timestamp: January 28, 2022, 11:05:12 pm
content: I think these are Alps parts.

author: free_electron
author_rank: Super Contributor
timestamp: January 28, 2022, 11:35:31 pm
content: mucking around with agilent front panels ?

author: alpher
author_rank: Frequent Contributor
timestamp: January 29, 2022, 01:37:48 am
content: Not at all, they belong to now obsolete, NLA Garland commercial oven controller.It's the footprint that matters here not much else.But now that you mentioned it they do look like those in older infiniium scopes.Hmm?

author: alpher
author_rank: Frequent Contributor
timestamp: January 29, 2022, 01:51:56 am
content: I did a search of images of Alps encoders, nothing came close.I do think that they may be alps parts, but I need to know at least partial model number or series.

author: free_electron
author_rank: Super Contributor
timestamp: January 29, 2022, 01:58:10 am
content: Quote from: alpher on January 29, 2022, 01:37:48 amyup. they are the same brand used in the infiniium scopes ( and 54645 / 54622 style machine )They are NOT alps . they are some chinese manufacturer. i fuond them once. let me see if i wrote it down somehwere ...

author: alpher
author_rank: Frequent Contributor
timestamp: March 22, 2022, 05:16:26 pm
content: Found something similiar:https://www.aliexpress.com/item/4000040808417.htmlThey read M24B311 and they do fit
Help Me Identify These Resistors (bands discolored) - Page 1
Forum section: electronics / repair

author: HooRide
author_rank: Regular Contributor
timestamp: June 27, 2022, 09:32:30 pm
content: Hi All, I have a Velodyne subwoofer (SPL8) that I'm refurbishing for a friend.I'd like to replace these two resistors 'just in case' but I'm not trusting the reading I'm getting from them considering the torture they've been through for the last 10 years.Any help reading the values based off the (discolored) bands and also an approximate of the wattage would be a great help.R3 reads 16.22k and R4 reads 18.26kThanks!

author: ledtester
author_rank: Super Contributor
timestamp: June 27, 2022, 10:16:17 pm
content: I would just contact Velodyne:Go tohttps://www.velodyneacoustics.com/en/manuals-and-documents/and scroll down to "Got any questions? Contact Us".To me they both look like 18K resistors: brown - grey - black - red with a tolerance of brown (1%). I'd guesstimate the wattage to be 5W.The best way to measure them is to first desolder one leg. Otherwise other circuit components can affect your resistance measurement.

author: abdulbadii
author_rank: Frequent Contributor
timestamp: June 28, 2022, 10:20:28 am
content: measure onboard ie. insitu ?do re-measure it off-boardQuote from: HooRide on June 27, 2022, 09:32:30 pmnot discolor but a bit on red or orange - ? - of R4:browngrayblackorange180 x 1000 = 180kor red 180 x 100 = 18kR3brownwhiteblackred190 x 100 = 19k

author: HooRide
author_rank: Regular Contributor
timestamp: June 29, 2022, 12:27:23 am
content: I definitely measured off-board. I've reached out to Velodyne, thanks for the suggestion. I had forgotten some companies are actually happy to help their customers.If they don't get back to me, I do believe they are either 18k or 19k, thanks for the extra set of eyes!

author: vk6zgo
author_rank: Super Contributor
timestamp: June 29, 2022, 12:45:58 am
content: They look a bit like fusible resistors, but the high apparent values counter indicates that.They are evidently "special" in some way, judging from the silkscreen rectangles on the board.Yes, Certainly 3W if not 5w.
Help me Identify this component by ST - Page 1
Forum section: electronics / repair

author: CrazyTiger
author_rank: Regular Contributor
timestamp: August 24, 2019, 07:20:18 am
content: Hi,I have this diode by ST which is shorted as someone fed 240AC to the 24v DC line.I believe its a bidirectional TVS diode, the marking is BEX. Can anyone suggest what would be the part number for this.My first guess is it might be SM15T39CA.https://www.st.com/resource/en/datasheet/sm15t.pdfIs there any other possibility?

author: fzabkar
author_rank: Super Contributor
timestamp: August 24, 2019, 07:35:05 am
content: It looks correct, but I'm wondering why the designer didn't choose a 24V unidirectional diode, assuming it is connected across a regulated 24VDC supply. A bidirectional diode affords no real reverse polarity protection, and a 40V breakdown voltage might be too high for the circuit.
Help Me Identify This Connector - Page 1
Forum section: electronics / repair

author: The Doktor
author_rank: Regular Contributor
timestamp: October 29, 2023, 09:51:34 pm
content: I'm trying to identify this connector, need the end that goes on the cable. It is 14 pin, goes on WinRadio G-305.

author: The Doktor
author_rank: Regular Contributor
timestamp: October 29, 2023, 09:54:23 pm
content: Cable is available, but over $50 with shipping. Looks like a $5.00 connector to me, hoping I can buy a replacement.ThanksEd

author: helius
author_rank: Super Contributor
timestamp: October 29, 2023, 10:08:09 pm
content: Mini D Ribbon (MDR)-14.

author: The Doktor
author_rank: Regular Contributor
timestamp: October 29, 2023, 10:23:14 pm
content: Yep, that's it! Got 2 for $5.00Thanks