hybridfree/eevblog-posts huggingface dataset:
Need help fixing PS2 controller - Page 1
Forum section: electronics / repair

author: ev_pal
author_rank: Newbie
timestamp: March 27, 2020, 11:13:29 pm
content: Hey guys,So, I'm trying to fix my Dualshock 2 that was lying around for quite some time, now. I think it has some faulty contact or something, and I say this because when I connect it, nothing happens, only the controller's red light turns on. If I press any button, there's no action at all, however, if I touch with my finger the strap marked in red in the attached picture, it sends random commands to the Playstation.I already cleaned the contacts and the carbon pads with alcohol and cotton buds, but that didn't solve the problem.It's probably worth mentioning that I removed both of the vibration motors from the remote because they had the wires a little snapped (more than a little to be fair) as they got stuck in the middle of the plastic joints when I opened the controller a long time ago to clean it.Can anyone help me troubleshoot the problem I'm having and probably help me fixing it? If you guys need more pictures os close ups, I'm glad to provide them.Best regards!

author: juneberry
author_rank: Newbie
timestamp: March 28, 2020, 08:33:57 pm
content: If you disassemble the controller a bit further, that flex cable connects to a flexible pad that has all the contacts for the buttons on it. I'd suggest starting by cleaning that with cotton swabs and isopropyl, and while you're in there clean the buttons themselves and the upper chassis. You can also lift the analog sticks right off their posts to clean underneath them easily. A word of warning, be careful not to bend the plastic that retains the shoulder buttons too much, as it is very flimsy and easily broken, especially on later revisions where they got cheaper with the design. Also be sure to not twist the caps on the analog sticks too much when removing them, pull them straight up as the plastic bit that holds them in place on the stick is very brittle and easily broken. Thankfully however the fit on those is universal and replacements are easy enough to get, but it's nice to not have to buy them haha...

author: ev_pal
author_rank: Newbie
timestamp: March 31, 2020, 06:52:17 pm
content: Thanks @juneberry, but I actually did that before, only with etanol, which I think that would do the same.The only thing I didn't do was to clean the analog sticks, but I don't feel that that's the problem. I just didn't clean the flex cable with isopropyl the last time, maybe that would help?
Need Help?, Fluke/Philips PM 5136, unit won't boot power-up cycle & just hang - Page 1
Forum section: electronics / repair

author: Steven
author_rank: Newbie
timestamp: December 13, 2021, 04:12:26 am
content: Hi everyone,I have a trouble with my old Fluke/Philips PM-5136 function generator, the LCD won't power-up cycle in booting initial system test and need help?.I hope someone have an experience with this funtion generator and share it.So far I have check it :On power supply board is working fine,# +5v = is ok# +16.5v = is ok# -16.5v = is ok# +10v = is ok# -10v = is okI don't find any wrong with power supply board.On the main control board, I am not familiar with this system design from philips. I am just finding :# uP 80C652 on Pin-9 (Reset) is working fine. on the power cycle reset the pin is high and if system running the pin is low = is ok# EPROM M27512FI I try to read the EPROM data using Hi-Lo Systems All-100p on all address = all the data is readable fine.# I tried to read I2C Bus and just find the system repeat continue sending I2C Master command 70h to slave PCF8576 LCD driver and the Slave PCF 8576 try to answer with ACK then another cycle is with NACK then I2C Stopand repeat this command again until the system power off.I hope find someone in this forum have the Philips design knowledge, please share it here. Many thanksHow to manual test Static RAM ?- PCF-8570P Static RAM 256 x 8bit Philips (I2C-Bus)- HM-6268P-25_Static RAM 4096-Word x 4bit_Hitachi- HM-6716P-30_Static RAM 2048-Word x 8bit_HitachiAny help would be appreciated.Thanks
Need Help for Backup Calibration Data Keithley 2015 - Page 1
Forum section: electronics / repair

author: letron77
author_rank: Contributor
timestamp: July 14, 2019, 02:09:56 pm
content: Hello everyoneI am trying to fix a 2015 Kiethley that is stuck.Its display reads "No comm link"Before any intervention I decide to save the firmware and files of settingI have already read several post very interesting on this siteI bought a TLC866 IIIt allowed me to back up ODD and EVEN firmwareBy cons I do not know how to save the data "instrument setup and calibration constant" which is on the eeprom 24lc16b (U136)on this page it is about the parametric data backup of a k-2001 by realizing a "DIY I2C dongle" to connect to the TLC866:https://www.eevblog.com/forum/testgear/restoration-glory-of-keithley-2001-dmm/msg384347/#msg384347Can someone tell me how to realize it?Is the procedure the same on a 2001 and 2015?Should it desolder 24lc16B?in advance thank you for your helpAlain

author: Samogon
author_rank: Frequent Contributor
timestamp: July 16, 2019, 07:54:40 am
content: You have to desolder it. In circuit it will play fool.

author: macboy
author_rank: Super Contributor
timestamp: July 17, 2019, 06:36:40 pm
content: Quote from: Samogon on July 16, 2019, 07:54:40 amMaybe, but maybe not.I have read the calibration data from the I2C EEPROMs of my K2001 meters by holding the CPU in reset, and reading with a TL866. Only 3 connections needed: data, clock, ground. The CPU must be held in reset to prevent errors caused by two I2C masters on the bus.

author: coromonadalix
author_rank: Super Contributor
timestamp: July 17, 2019, 08:24:18 pm
content: you have already your thread why double posting ?https://www.eevblog.com/forum/testgear/need-help-for-backup-calibration-data-keithley-2015/msg2549211/#msg2549211reported to admins
need help for repair or fix mettler balance scale pj 400 and 3600 - Page 1
Forum section: electronics / repair

author: Keno1981
author_rank: Contributor
timestamp: October 22, 2023, 07:25:43 am
content: hi, i need some help to fix mettler pj400 and pj3600 please! they were both ok after shipping they both have the same error. the 0.00 keeps blinking and also i can not access the menu. i checked all connection and seem ok. any advice or help needed please! it is the first time i have such a balance what else do i have to check. the fuse seems ok. what may cause that error due to transport? thanks in advance

author: Keno1981
author_rank: Contributor
timestamp: October 22, 2023, 09:25:49 pm
content: actually the pan was removed and the under pan part was covered so it was impossible to get an overload damage. the strangest thing is why i can not access menu at all? only switch on and off and blinking 0.00. will try to unscrew that part but do you think that may be the case? thanks

author: wraper
author_rank: Unknown
timestamp: October 22, 2023, 09:33:28 pm
content: If it's broken, it should be obvious. It's basically a flat rectangular piece of metal with screw holes on its ends and is milled in the middle to a very thin thickness. If it's broken, you will have two separate pieces instead of a single part. I do not have similar Mettler balance at hand to verify and last time I used these was a few years ago but probably menu will not be accessible until balance properly initializes.

author: wraper
author_rank: Unknown
timestamp: October 22, 2023, 09:39:35 pm
content: It looks similar to this

author: Keno1981
author_rank: Contributor
timestamp: October 22, 2023, 11:14:47 pm
content: how can i get to that part? what should i remove?

author: wraper
author_rank: Unknown
timestamp: October 22, 2023, 11:21:12 pm
content: You can unscrew the whole mechanism from the bottom, take it out and look from sideways if this part is broken. No need to take the mechanism itself apart, and I suggest not taking it apart needlessly as you can easily mess up adjustment. If it's broken, sadly there is nowhere to get replacement part other than salvage from another balance. You can hack something to replace it but performance won't be the same.

author: Keno1981
author_rank: Contributor
timestamp: October 22, 2023, 11:31:37 pm
content: if it is that part i am alignining picture it is not broken.

author: wraper
author_rank: Unknown
timestamp: October 23, 2023, 02:43:18 am
content: Quote from: Keno1981 on October 22, 2023, 11:31:37 pmYes, that's the thing. However if it's not broken (not clear on the photo), the rest of mechanism should be moving together with part with brass cone on it. In other words distance between the two screws on the photo must not change when you move the mechanism. As this thingy is what transfers all of the force to the rest of mechanism.
Need Help for someone have XDEVS.COM credential account - Page 1
Forum section: electronics / repair

author: RahmanID
author_rank: Contributor
timestamp: February 05, 2025, 12:18:17 pm
content: Hello,Sort story I have problem with W&G Spectrum Analyzer SNA-23.Somebody have uploaded HDD backup to XDEVS.COM docs, but to access that need some authorization:https://www.eevblog.com/forum/repair/wg-sna-2023-spectrum-analyzer-repair/msg3297028/#msg3297028I has request credentials account to XDEVS.COM team but no have response after couple days.So I need help for someone have XDEVS.COM credentials to download all file from:https://xdevs.com/docs/WG/SNA23/and send back to me.Thanks for help.

author: Gyro
author_rank: Super Contributor
timestamp: February 05, 2025, 12:26:15 pm
content: xDevs.com is owned by forum member TiN. He hasn't posted for quite some while though.

author: RahmanID
author_rank: Contributor
timestamp: February 05, 2025, 12:30:44 pm
content: Quote from: Gyro on February 05, 2025, 12:26:15 pmHim last active two years ago :'( (August 16, 2023, 02:18:00 pm)https://www.eevblog.com/forum/profile/?u=26015

author: TERRA Operative
author_rank: Super Contributor
timestamp: February 05, 2025, 01:09:36 pm
content: Here's a link to the files, I put them on my google drive:https://drive.google.com/drive/folders/1PUBnrKLaLkMXnAreh2UOz-vWgIdPhkAI?usp=sharingYou'll find all the files in the original file structure, and also a single zip file of everything which might be easier to download.

author: RahmanID
author_rank: Contributor
timestamp: February 05, 2025, 01:13:05 pm
content: Quote from: TERRA Operative on February 05, 2025, 01:09:36 pmThank you very much bro, you save my life todayDownloading on progress...
[fixed] Need help: GwInstek GPS-4303 "parallel" not working properly - Page 1
Forum section: electronics / repair

author: alex0801
author_rank: Newbie
timestamp: October 03, 2023, 11:40:26 am
content: Hi there,I have a GwInstek GPS-4303. I switched CH1 and CH2 to be in series and attached a load with 3 amps at ~57V.During fine-adjustment of the current by turning the current-know, I slightly "touched" the right tracking switch. slightly touching it was enough for the supply to switch from series to parallel and *bam*, output went down to 0. It sounded like a blown fuse or part and smelled a bit.I checked all the internal obvioous fuses: They are all fine. No visible damage to any part. Looks just fine.Current behavior of the power supply: All works fine, except the series connection of CH1+CH2:It still gives me just above 30V, and up to 3Amps, but no longer up to 60V.I found theself-drawn schematicfor the Tenma 72-6905 whis is a rebranded GwInstek GPS-4303, but I'm not able to track down the issue.Is there an expert who can guide me a bit? I'm not that familar with finding root-causes of non visible damages/problems.Tools available:Multimeter30V regulated power supplyDSObest regards,Alex

author: alex0801
author_rank: Newbie
timestamp: October 03, 2023, 01:30:36 pm
content: I think I fixed it:Desoldered three relais that switch between independant, series and parallel. Tested them outside the PCB... All worked fine. Found out, that for one of the relais, the contacts measured a short circuit. Found the diode for the relais measured almost 0 Ohms. Diode test failed. desoldered it, measured again, still failed.Replaced it with a 1N4148 THT diode, shorted the leads, looks almost a MELV diode :-)Inserted the new diode, resoldered the relays, tested: Works as before.Simple fix, but still can't believe that there is no mechanism that prevents this problem...
need help ident 2 transistor. - Page 1
Forum section: electronics / repair

author: ErwinsCat
author_rank: Regular Contributor
timestamp: August 26, 2021, 12:02:23 pm
content: this is probably very easy for most people here, I'm trying to fix a multimeter protection clamp circuit, there was 2 transistor shorted and I changed them with a couple of generic NPN from a cheap eBay kit and it fixed the issue. now looking for a proper replacement as I'm guessing the cheap one probably not going to protect the circuit when needed coz of speed and other parameters. I'm having trouble finding info on transistor stamped 8050 6m c the other one is stamped A992 FA5BCI believe the first part is 2SA992 not sure about second part (FA5BC)any help appreciatedthanksKA_WHO

author: Ian.M
author_rank: Super Contributor
timestamp: August 26, 2021, 12:22:35 pm
content: 2SA992- PNP, High hFEand relatively high voltage but not that exotic compared to some Zetex 'superbeta' parts. May be difficult/expensive to source genuine parts. TryKSA992 @ Mouser, which should be equivalent.SS8050- a little bit special because its high current for a TO92 package with relatively high hFEas high currents, but nowadays as common as dirt.Don't sweat the batch/lot codes. They are often totally undecipherable without the original manufacturer's production records. *SOME* manufacturers encode a production line identifier and often a human readable date, but others just use alphabet soup as a key into their database.However odds are your meter's clamping circuit doesn't use them anywhere near their full ratings. e.g. if it clamps at low voltage, the voltage rating of the 2SA992 wont matter. If you have *ANY* difficulty sourcing exact replacements from a reputable distributor, trace out the circuit and post it here for comment on how critical they are.

author: ErwinsCat
author_rank: Regular Contributor
timestamp: August 27, 2021, 01:23:00 pm
content: Hi, thanks for the reply, as you said it's probably not a critical component as it working with the generic replacement for a year now and haven't had any issues with it yet. I thought its better if I could replace them with proper parts. one issue I have with SS8050 replacement is the pinout is different from the stamped original device and that made me question if it's the correct part. I try to see if I can draw the schematic from the board but as far as I remember these 2 tranis are both used as diodes i think? i remember 2 pins were shorted together and I remember its remind me of those standard transistor/diode clamping circuit usually used in multimeters input.Thanks

author: Ian.M
author_rank: Super Contributor
timestamp: August 27, 2021, 01:56:24 pm
content: The various manufacturers '8050' pinouts are all over the place. Maybe it was originallyBTN8050A3, but it doesn't matter (as long as you can bend the leads to fit the footprint without shorting) as its equivalent to SS8050.If they are diode connected, its even less likely that the specific gain and voltage ratings are critical.
Need Help Identifing DIODES DPC-10 rev A - Page 1
Forum section: electronics / repair

author: DRJIMD
author_rank: Newbie
timestamp: June 28, 2023, 07:15:58 pm
content: I am working on a Phase Perfect DPC-20 Phase Converter (Blue Box) with a DPC10-Rev A Control Board.I need some help identifying some Surface Mount Diodes. I use Mouser and Digikey..I replaced all the caps and now the voltage is correct right up to the DIODES and then a big decrease which isn’t enough to trigger the IGBT’s. I just haven’t been able to find a close match. Before you ask, NO Schematic, NO Help from Phase Perfect so I’m on my own. I will listen to all advice.After I get this working I’m going to publish all my findings. Parts List and Troubleshooting Guides.I use Mouser and Digikey..

author: wraper
author_rank: Unknown
timestamp: June 28, 2023, 08:20:01 pm
content: First is B140 Schottky diode made by unknown manufacturer, second SMAZ18 Zener diode by Diodes Inc. Although unless they are faulty, I don't see any reason to replace them.

author: fzabkar
author_rank: Super Contributor
timestamp: June 28, 2023, 08:45:11 pm
content: http://markingcodes.com/search/c/zjfhttp://markingcodes.com/search/c/b140

author: DRJIMD
author_rank: Newbie
timestamp: June 28, 2023, 08:55:23 pm
content: Thank you for your info. They are defective. Diode test has voltage in both directions.They also have a forward voltage drop of 2.5V. It need 7V, it has 7V from the Cap and after the Diode the voltage is only 4.5 not enough to trigger the IGBT. The DSP just shuts the system down.

author: DRJIMD
author_rank: Newbie
timestamp: June 28, 2023, 11:59:53 pm
content: Found a nice Surface Mount Database SMThttps://smd.yooneed.one/

author: DRJIMD
author_rank: Newbie
timestamp: July 01, 2023, 10:31:03 pm
content: Thanks the DIODES worked perfect..... Thanks.
Need help identifiying a component - Page 1
Forum section: electronics / repair

author: Rick
author_rank: Frequent Contributor
timestamp: October 30, 2019, 06:17:50 pm
content: The following picture shows what I believe is an LED driver chip (because it is in an LED bulb circuit). However I could not find that SMT code ("GB1T" or may be "G81T") in any SMT code list online.Could you please give a URL where it is included in a list of codes or better, if you know what it is, tell which particular component it is.Thank you.

author: ataradov
author_rank: Super Contributor
timestamp: October 30, 2019, 08:29:17 pm
content: If you search for "gb1t sot23-6", you will find a couple links likehttps://www.makuwang.com/search/xq?id=8902-GB1T.htmlandhttp://blog.sina.com.cn/s/blog_a377c9720101fho3.html. Based on this it looks like this is a very custom/obscure LED driver chip.

author: fzabkar
author_rank: Super Contributor
timestamp: October 30, 2019, 09:13:25 pm
content: Could we see the whole PCB?Have you traced out the chip's pins, eg ground, Vcc?

author: coromonadalix
author_rank: Super Contributor
timestamp: October 31, 2019, 01:20:29 am
content: Seems to be this partASML-5828 SOT323 limiter series pin/schottky pair, D1 pin, D2 sch

author: amyk
author_rank: Super Contributor
timestamp: October 31, 2019, 02:20:57 am
content: LNK4012S? Is there a transformer on the board?

author: Rick
author_rank: Frequent Contributor
timestamp: October 31, 2019, 02:43:17 am
content: Quote from: fzabkar on October 30, 2019, 09:13:25 pmI have not yet but I shall do soon as there is no schematic.As there is a transformer and a N channel MOSFET I think this is some sort of flyback converter and an LED driver is used in these designs, and the only chip with at least 3 pins is this one with the MOSFET that I could identify clearly.

author: Rick
author_rank: Frequent Contributor
timestamp: October 31, 2019, 02:49:18 am
content: This is the other side of the PCB.

author: Rick
author_rank: Frequent Contributor
timestamp: October 31, 2019, 06:19:56 am
content: Quote from: coromonadalix on October 31, 2019, 01:20:29 amThere is a 4th character at the end of the code and it is a 6 pin package not 3. So I think it is different.

author: amyk
author_rank: Super Contributor
timestamp: October 31, 2019, 11:58:03 am
content: Looks like LNK4012S may be a good match, this is an isolated (or attempt to be) PSU.

author: Rick
author_rank: Frequent Contributor
timestamp: October 31, 2019, 03:04:26 pm
content: Quote from: amyk on October 31, 2019, 11:58:03 amSomebody sent me the following file. But the name does not match either...

author: Rick
author_rank: Frequent Contributor
timestamp: October 31, 2019, 03:06:24 pm
content: Thank you.
Need help identifying 5mm pitch forklift PCB connector - Page 1
Forum section: electronics / repair

author: FF_CCSa1F
author_rank: Newbie
timestamp: June 08, 2023, 06:47:42 pm
content: This is a long shot, but Google as well as endless inventory browsing has failed me. I'm repairing a PCB for a Merlo branded forklift-loader-thing, and one of these connectors is burned out. Does anyone have a clue what they are? You can see the logos from two different brands in the microscope image, but no amount of reverse image searching has brought me any relevant hits.The pin pitch is 5 mm and the pin diameter is about 1 mm.If anyone has any clues about what these are, I'd appreciate that a lot.Thanks!

author: langwadt
author_rank: Super Contributor
timestamp: June 08, 2023, 07:52:05 pm
content: metrimate?

author: Jon_S
author_rank: Contributor
timestamp: June 09, 2023, 10:50:12 am
content: It looks exactly like a Trident TST-range connector, but I don't think I have ever seen a 15-way before and the current catalogue don't show it as an option. Possibly a 'compatible' off-brand?Trident Catalog

author: FF_CCSa1F
author_rank: Newbie
timestamp: June 09, 2023, 04:11:47 pm
content: This is definitely on the right track (as are Metrimate, thanks langwadt!)!The 24 pin and 12 pin TST connectors seem to be compatible with the connectors on the board, even though it's a different brand. So these will actually work if I can track them down! Thank you so much! The specific numbers for these are ITT CANNON TST12RB06T and TST24RB06T.Sadly, these connectors seem to be difficult to get your hands on, so if anyone has any clues about what those "compatible off-brands" might be, do chime in. But I can probably figure something out based on this. What a relief!!EDIT: Alright, barring reputable retailers, I managed to find some on Ebay. Hopefully they'll pan out okay. Thanks again for the help!
Need help identifying a component - Page 1
Forum section: electronics / repair

author: electroguy98
author_rank: Newbie
timestamp: December 19, 2019, 10:36:36 am
content: Hello..I was trying to replace the left analog stick of my ps4 controller and while heating the solder pads with a hot air gun I burnt the connector circled in the picture. I need help in identifying the component and also from where I can get it. If not possible then please let me know if there's an alternative.🙏🙏Thanks

author: Psi
author_rank: Super Contributor
timestamp: December 19, 2019, 11:10:25 am
content: Need a much higher res /closer image for us to positively identify it.

author: electroguy98
author_rank: Newbie
timestamp: December 19, 2019, 11:20:50 am
content: Here is a link to the website which has the images:https://www.acidmods.com/forum/index.php?topic=43542.0

author: electroguy98
author_rank: Newbie
timestamp: December 19, 2019, 04:00:52 pm
content: Please sir help me I couldn't find any other high resolution images but I can tell that a 12-pin flex ribbon cable attaches into the burnt/destroyed connector. Let me know if this helps🙏

author: LateLesley
author_rank: Frequent Contributor
timestamp: December 19, 2019, 04:37:53 pm
content: I think this may be it -https://www.aliexpress.com/item/4000073381392.html?spm=a2g0o.productlist.0.0.326d2b8bAqdFLz&algo_pvid=9ce9f335-f639-41c6-8adf-57c10d6ecba6&algo_expid=9ce9f335-f639-41c6-8adf-57c10d6ecba6-7&btsid=f6fd323e-3842-444b-90ea-e9ea365049bf&ws_ab_test=searchweb0_0,searchweb201602_10,searchweb201603_53If you search for FFC-12P SMD or FPC-12P SMD connectors you should find them. I can only find 50pcs or 100pcs on ali, but with a bit of googling, you might find them in single quantities.

author: electroguy98
author_rank: Newbie
timestamp: December 19, 2019, 04:41:08 pm
content: Thanks a lot🙏🙏... I'll check it out
Need help identifying a connector - Page 1
Forum section: electronics / repair

author: DrMag
author_rank: Regular Contributor
timestamp: February 14, 2025, 03:06:58 pm
content: I've got a fan on a radio I need to replace. The stock fan is crazy expensive, and I'd like one that's a bit quieter anyway. But I can't for the life of me figure out what the connector it uses is. Does anyone recognize this one? I've confirmed that it's 0.1" pitch, but that hasn't helped narrow it down at all.

author: DrMag
author_rank: Regular Contributor
timestamp: February 14, 2025, 03:19:05 pm
content: May have answered my question.. I have JST connectors on hand, and they didn't appear to match. But some additional googling revealed there are several more types of JST connectors than I knew..This appears to be a JST-EH type.https://www.mattmillman.com/info/crimpconnectors/common-jst-connector-types/#eh

author: PA0PBZ
author_rank: Super Contributor
timestamp: February 14, 2025, 03:40:31 pm
content: It's not too hard to take the pins out of the connector, just lift the little plastic tabs and pull. Then cut of the wires, solder the wires of the new fan on the pins and put them back in the connector.

author: DrMag
author_rank: Regular Contributor
timestamp: February 14, 2025, 03:41:33 pm
content: Call me a purist, but that's exactly what I was hoping to not have to do. I'd prefer a clean interface to hacking pieces together.

author: coromonadalix
author_rank: Super Contributor
timestamp: February 14, 2025, 04:07:04 pm
content: and avoid wrong polarity

author: Kjelt
author_rank: Super Contributor
timestamp: February 14, 2025, 04:11:28 pm
content: So you can remove the pins from the connector on the wire and replace them with two new connectors.Alternative:If you do have the more common JST-XH tools and connectors lying around replace the board connector with an XH version.That is what I usually do if the pitch fits, because I refuse to buy tools and connectors for all 10000 different versions from all manufacturers
Need help identifying a Mosfet replacement - Page 1
Forum section: electronics / repair

author: wwwaynew111
author_rank: Newbie
timestamp: May 21, 2023, 04:15:07 pm
content: I have a mosfet transistor from a dell monitor model u2715hc power supply board. The printing on it is E05N15R7D01. Would someone please advise me as to what amperage and volts it may be and suggest a replacement. I cannot find any information about it. Thanks

author: DavidAlfa
author_rank: Super Contributor
timestamp: May 21, 2023, 05:17:01 pm
content: Post pictures dude!

author: fenugrec
author_rank: Frequent Contributor
timestamp: May 22, 2023, 12:00:27 am
content: Quote from: wwwaynew111 on May 21, 2023, 04:15:07 pm+1, upload a photo, I don't have my ouija board handy...That said, many mosfets follow a numbering pattern of <prefix>05N15<suffix> where those numbers approximate voltage and current ratings. There are many more variables but that's a starting point.

author: wwwaynew111
author_rank: Newbie
timestamp: May 22, 2023, 12:21:49 pm
content: ...sorry...just figured out how to post pic...

author: fzabkar
author_rank: Super Contributor
timestamp: May 22, 2023, 07:14:02 pm
content: "The printing on it is E05N15R7D01."It's E015N15R + 7D01, but that still doesn't help me. The "7D01" is most likely a date/batch code. You could compare it against the date codes on the ICs, or the manufacture date on the monitor's label.The package is TO-220F.

author: fenugrec
author_rank: Frequent Contributor
timestamp: May 22, 2023, 11:19:13 pm
content: in the first few search hits :https://html.alldatasheet.com/html-pdf/961273/CYSTEKEC/MTE015N15RF3-0-T7-X/3612/9/MTE015N15RF3-0-T7-X.htmlnot necessarily this exact one (hard to say with no logo) , but I would not hesitate to try an equivalently spec'd part.
Need help identifying a surface mount component - Page 1
Forum section: electronics / repair

author: Pete66
author_rank: Regular Contributor
timestamp: September 26, 2019, 05:46:22 pm
content: HelloI am trying to fix a Red Witch Medusa chorus pedal but I have no schematics. I am trying to identify the SOT component below. The only markings it has are "MV"According to the SMD codes databook it is a Diode. But I think it may be a transistor because it connects to the LED which flashed at the rate of the LFO circuit.Any ideas what it might be?

author: PA0PBZ
author_rank: Super Contributor
timestamp: September 26, 2019, 06:12:01 pm
content: NPN Transistor marked MV:https://4donline.ihs.com/images/VipMasterIC/IC/KECC/KECCS05594/KECCS05594-1.pdfN Channel mosfet marked MV:https://nl.mouser.com/datasheet/2/115/BS170F-355970.pdf

author: paul8f
author_rank: Regular Contributor
timestamp: September 28, 2019, 06:38:44 am
content: How did you find this information so quick? Amazing!

author: PA0PBZ
author_rank: Super Contributor
timestamp: September 28, 2019, 07:28:14 am
content: Quote from: paul8f on September 28, 2019, 06:38:44 amI have a collection of links to search for SMD markings, in this case the most helpful one was:https://alltransistors.com/smd-search.php?search=MVAfter that check the package and the datasheet.

author: paul8f
author_rank: Regular Contributor
timestamp: September 29, 2019, 06:51:12 pm
content: Quote from: PA0PBZ on September 28, 2019, 07:28:14 amCheers for posting the link!Just curious, how many links do you have for checking SMD markings in total? Do you know if the suggested smartphone app on thealltransistorspage is any good?

author: PA0PBZ
author_rank: Super Contributor
timestamp: September 29, 2019, 06:58:36 pm
content: Quote from: paul8f on September 29, 2019, 06:51:12 pmAt the moment just these:I'm sure you can work out the URLsI have no experience with the smartphone app, sorry.
Need help identifying a terminal block to card edge connector family - Page 1
Forum section: electronics / repair

author: M1010
author_rank: Newbie
timestamp: September 12, 2025, 05:50:21 pm
content: I'm the guy that many of my contacts come to when they have a difficult-to-find item. Generally, I can find it on the internet somehow.But recently, I was asked to identify a connector that I haven't been able to find any info on. Attached is a pic of it. It resembles a terminal block with a card edge connector and vertical guide rails.If someone can point me to a product family I can work out the details and narrow it down.Thank you in advance.

author: wraper
author_rank: Unknown
timestamp: September 12, 2025, 06:17:58 pm
content: Not sure if it's exactly the same part but looks similar to Phoenix contact SKBDhttps://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1207/2202615.pdf+ FLRPhttps://www.phoenixcontact.com/en-pc/products/mounting-material-flrp-icv-80-1808353

author: M1010
author_rank: Newbie
timestamp: September 13, 2025, 04:22:49 pm
content: I think that's it!! I don't have access to the connector at this time, but will followup with confirmation when I know for sure. Thank you sooo much!
"Need Help Identifying Burned Q3 Component on Solenoid Valve Board for Oxygen Co - Page 1
Forum section: electronics / repair

author: Salehabadi
author_rank: Newbie
timestamp: January 20, 2025, 01:41:00 am
content: Hello,I have a circuit board from the solenoid valve of a hospital oxygen concentrator's moisture filter, and one of its components (Q3) has burned. I need help identifying its name and specifications so I can replace it.Details:1. Component Location: The damaged component is located at position Q3 on the board.2. Physical Condition: The area around the component is completely blackened, and part of the component itself has melted, making its markings unreadable.3. Application: This board is part of the solenoid valve controlling the moisture filter in a hospital oxygen concentrator.My question is:Can anyone help identify the type and specifications of the Q3 component based on the attached photos?

author: fzabkar
author_rank: Super Contributor
timestamp: January 20, 2025, 02:04:33 am
content: I'm guessing it's a PNP BJT or P-channel MOSFET. It appears to be a high side load switch.
Need help identifying circular connector - Page 1
Forum section: electronics / repair

author: Deepak
author_rank: Regular Contributor
timestamp: August 01, 2022, 03:44:17 pm
content: I have a Garmin Rino 655t that needs a new charger. Aftermarket chargers are really pricy and I can find chargers with barrel plugs that have the right spec (9.5v 1.4a) at a fraction of the cost. The only problem is I'm not able to find the right connector for it after combing Digikey & Mouser's thousands of circular connectors. It's a keyed connector with a 8.2mm or so diameter and 3.5mm pin spacing. A (blurry) picture of the shape:Any help would be greatly appreciated.

author: wraper
author_rank: Unknown
timestamp: August 01, 2022, 03:51:23 pm
content: Custom connector from Garmin.

author: Deepak
author_rank: Regular Contributor
timestamp: August 01, 2022, 03:54:52 pm
content: Thanks for the help, though this is what I feared.I don't have a 3D printer but I could try molding it.

author: bateau020
author_rank: Frequent Contributor
timestamp: August 04, 2022, 11:47:40 am
content: Take the cable from the old one and connect it to a new charger? Or use a new chinese copy?https://www.aliexpress.com/i/32657135181.html

author: coromonadalix
author_rank: Super Contributor
timestamp: August 04, 2022, 12:46:11 pm
content: the price is so low....... buy it ........ they copy everything loll

author: voltsandjolts
author_rank: Unknown
timestamp: August 04, 2022, 01:02:27 pm
content: Sugruworks well for moulding custom connectors like this.Crimp wires to your receptacles, fit them in place and press in the sugru, form nicely around the wires...done.
Need help identifying component - Page 1
Forum section: electronics / repair

author: zzattack
author_rank: Regular Contributor
timestamp: October 27, 2019, 09:54:59 pm
content: I'm looking to replace a SOIC8 chip on a seemingly simple device. The purpose of the device isn't known but given the available info I think it should be easy enough. This is what I traced out:Code:PIN 1: to MCU, pulled up PIN 8: to MCU, no pull upPIN 2: external PIN 7: GNDPIN 3: external PIN 6: +3v3PIN 4: +3v3 PIN 5: to MCU, no pullupFirst of all, the orientation is not clear. It could be rotated 180°. Assuming my marking above is not rotated:* A total of 3 pins are connected to a microcontroller, of which only one is pulled up.* Pins 2 and 3 lead to a connector through a series resistor. Likely inputs.* There's a decoupling cap over pins 6 and 7.The chip's marking definitely has a TI logo and seems to start with '23', possibly 234. Initial suspect is a OPA234x dual opamp, but none of the listed TI opamps seem to conform with this pin organization.Anyone recognize likely candidates?

author: DaJMasta
author_rank: Super Contributor
timestamp: October 27, 2019, 10:13:49 pm
content: A picture may be helpful, as would values of the resistors. If you've got a single 3.3V rail and a normal value pullup resistor, I'd expect it's communicating through serial, which rules out analog-only parts like opamps. You can check this by looking at the micro's datasheet and seeing whether the pins it connects on are hardware serial pins or not - also if they are shared with other devices (an SPI connection, for example, would use three MCU pins, maybe using a pullup on the data pin if the chip in question needs it, and then pin 4 could be chip select.)I think the real telling thing would be knowing what it connects to, though. If the series resistors are high value, you can basically guarantee it's an input, but if they're smaller, they could be current limiting protection resistors for the unknown chip. If they're very low, they could even be a serial transmission line (like USB) that needs them for normal termination, though this also usually involves a ground connection and some small filtering caps and a TVS diode/pair.Even position on the board or trace thickness can be useful information - in an all digital area of a dual domain board would suggest a digital part, thick power traces or output traces could suggest a driver IC.

author: fzabkar
author_rank: Super Contributor
timestamp: October 27, 2019, 10:25:39 pm
content: It looks tantalisingly similar to this CAN bus transceiver, but with mirrored pinout:www.ti.com/lit/ds/symlink/sn65hvd234-q1.pdfwww.ti.com/packaging/docs/partlookup.tsp?searchType=partmark&keyword=&partNumber=&partmarking=234

author: zzattack
author_rank: Regular Contributor
timestamp: October 27, 2019, 11:31:18 pm
content: Quote from: fzabkar on October 27, 2019, 10:25:39 pmSpot on. Looks like my tracing was done on a mirrored picture. CAN RX/TX match up with remappable pins on the MCU which can be selected for CAN mode and the 234 from the chip marking recurring in the chip type is awfully suspect. Case closed, thank you.
Need help identifying component - Page 1
Forum section: electronics / repair

author: prollie
author_rank: Newbie
timestamp: August 20, 2021, 08:57:10 am
content: I'll keep it short. I haven't been able to find a visual or indicator match in my searches. Hopefully what this component is, will be obvious to a lot of you guys. What is this?Alt:Also, any hints on where to find close enough specs for this type of component to aquire a replacement, or how to diagnose it? Without knowing what it is, I'm not quite sure how to tell if this is busted or not.FWIW, this is a Garmin Nuvi 3590LM that won't charge or communicate over USB after the user inserted the micro-USB plug the wrong way. Functional when charging battery by other means (bench psu), but USB seems dead. I replaced the USB 3311C transciever/controller chip, but no go. I have been unable to find any scematics or service manual for this or any closely similar units.

author: wraper
author_rank: Unknown
timestamp: August 20, 2021, 09:14:55 am
content: QuoteAFAIK it's only possible by ripping off connector from the PCB. Or maybe connector itself was damaged. Did you check what's going on with +5V VUSB? Usually there is some sort of fuse and TVS. Part in question has nothing to do with the fault. It's a 32.768 Khz crystal.

author: mariush
author_rank: Super Contributor
timestamp: August 20, 2021, 09:19:58 am
content: I'm probably wrong, but it makes me think that if it's not some sort of antenna for the gps, then it's probably a sort of detector for motion (detect tilt or orientation so that it can flip the screen) or maybe a shock / acceleration sensorYeah, wraper is probably right. The two ceramic capacitors to ground by the part is common for such parts.

author: gamalot
author_rank: Super Contributor
timestamp: August 20, 2021, 09:33:47 am
content: It looks like a crystal by Seiko Epson.

author: gamalot
author_rank: Super Contributor
timestamp: August 20, 2021, 09:38:10 am
content: Quote from: gamalot on August 20, 2021, 09:33:47 amhttps://www5.epsondevice.com/en/products/crystal_unit/mc146.html
Need help identifying component - Page 1
Forum section: electronics / repair

author: _rushin_or_draggin_
author_rank: Regular Contributor
timestamp: February 23, 2024, 10:38:33 pm
content: Hey all, I hope I’m posting this in the right section. I recently had a lightning strike nearby and the HDMI port on my NVR no longer works. Everything else works fine, including the VGA output. With that in mind, I’m focusing my attention around the HDMI port section of the PCB and notice 2 ICs each 10 pins. The only text on them is 33C and on the soldermask D34 and D35. It looks like the positive and negative pins from the HDMI TMDS channels and clock go into one side and the other side goes to something under a heat sink. Only 4/5 pins on each side are used and the middle pin is NC. I’ll try to attach a photo. Thanks!

author: selcuk
author_rank: Frequent Contributor
timestamp: February 23, 2024, 10:45:59 pm
content: It can be an ESD diode. IP4283CZ10 or similar.

author: fzabkar
author_rank: Super Contributor
timestamp: February 23, 2024, 11:42:25 pm
content: I think it might be this:SEU3304PC, Salltech, 4-Line Ultra Low Capacitance TVS Diode, 3.3V, marking 33C, DFN2510-10:http://www.salltech.com/UploadFiles/Files/ESD/6.%20ESD%20DF%EF%BC%AE2510/86.ESD%20SEU3304PC%20DFN2510%20Spec.pdfAt the moment I can only access Google's cached version of the datasheet:https://webcache.googleusercontent.com/search?strip=1&q=cache:http%3A%2F%2Fwww.salltech.com%2FUploadFiles%2FFiles%2FESD%2F6.%2520ESD%2520DF%25EF%25BC%25AE2510%2F86.ESD%2520SEU3304PC%2520DFN2510%2520Spec.pdfSimilar components here:https://web.archive.org/web/20210923200204/http://salltech.com/sites/default/files/jiejiefangan/Circuit%20protection.pdfhttps://datasheet.lcsc.com/lcsc/2012110106_SALLTECH-SEU0524PC_C964550.pdf

author: _rushin_or_draggin_
author_rank: Regular Contributor
timestamp: February 25, 2024, 12:50:06 am
content: Thank you for the datasheets! Quick question, since this IC is going on the TMDS channels, which are max 3.3V, should I get a TVS diode with a 3.3V working voltage or 5V?

author: wraper
author_rank: Unknown
timestamp: February 25, 2024, 12:53:09 am
content: You should check those TMDS lines for resistance to GND. If any is shorted, remove that ESD protection device. If still shorted after that, IC outputting HDMI is damaged.

author: markusdd
author_rank: Contributor
timestamp: February 25, 2024, 01:20:34 pm
content: exactly. these devices protect the HDMI retimer/en-/decoder chip that surely follows somewhere downstream.you should be able to remove them and everything should still work. (or wwork again if one is shorted, which is what most likely happened.If removing these does not fix it, then the downstream chip has suffered. another option is that these HDMI lines have additional external filters on them, these are also famous for going bad when ESD events occur.Make sure to replce the ESD protection Diodes if one is bad, ESD surging on HDMI is common. You should be able to use any HDMI capable ESD diodes, they usually have this denoted in the datasheet, examples have been posted.
Need help identifying component - Page 1
Forum section: electronics / repair

author: cdacunha71
author_rank: Newbie
timestamp: April 03, 2024, 05:16:18 pm
content: I'm trying to repair the spark ignitor from my daughter's gas cooker. I took out the transformer as none of the plugs were working and opened up the box. The high voltage transformer still measures fine and all other components too. There is one although I cannot identify, it must be some kind of neon bulb as I found some simple spark schematic that use one.Does someone recognize it, it has 95 marked on the side

author: Gyro
author_rank: Super Contributor
timestamp: April 03, 2024, 05:37:16 pm
content: It's a gas discharge tube (GDT)...https://uk.rs-online.com/web/c/?searchTerm=gdtThey are normally used as transient protectors (very infrequent high discharge current), but in simple ignition systems they are used to discharge a capacitor into the primary of the high voltage pulse transformer to generate the sparks. They break down at certain voltage (in the 90V - 250V typically for that package) discharge the capacitor as a current pulse, and then become non-conducting again until the capacitor (normally fed by a resistor) voltage recovers, then triggers again.GDTs have a limited life in this duty, so it has possibly gone faulty. You may get an idea of the voltage rating by (carefully) measuring the capacitor voltage, and picking one at about 2/3 of that voltage. The discharge capacitor is also highly stressed and may be failing.P.S. The 95 may be a breakdown voltage rating, but more likely a date code(?) or part number. If there is no 'tick tick tick' sound, regardless of sparks, then the capacitor isn't getting up to voltage or the GDT isn't firing.
Need help identifying component - Page 1
Forum section: electronics / repair

author: vinovino
author_rank: Contributor
timestamp: December 12, 2024, 02:55:19 am
content: Need help identifying the component and a possible replacement parts.The designator says FL14, I think its a kind of filter but I don’t know what kind.It has 3 pads underneath, the middle pad is connected to ground.It is around 2mm size.Please see attached images of pad and the filter itself beside a ruler.

author: amyk
author_rank: Super Contributor
timestamp: December 12, 2024, 03:27:39 am
content: What is this out of?FL20 also looks cracked.

author: u666sa
author_rank: Frequent Contributor
timestamp: December 12, 2024, 05:47:44 am
content: FL15 looks normal. You can take it off, rig it up and measure it with NanoVNA. It's a coil, two coils with ground in the middle. Unless FL15 pin to ground does not measure as coil, then it is a capacitor, but the marking say L, so I suspect a coil.All these 3 components should have same exact values. Measure FL15, and use two small coils (or caps if it is a cap) in place of one.

author: coromonadalix
author_rank: Super Contributor
timestamp: December 12, 2024, 02:51:44 pm
content: woul be as mentioned FIlter line smd inductive most of the time, but some do include capacitors ...

author: fzabkar
author_rank: Super Contributor
timestamp: December 12, 2024, 04:46:07 pm
content: Could FL15 and FL20 (and FL14) be T filters?https://www.daenotes.com/sites/default/files/article-images/T-filter.webphttps://www.mouser.com/ds/2/281/c51e-794816.pdf(page 128)Did someone replace FL20 (and FL15) with the wrong part and end up shorting it to ground? Is the centre pin grounded (yes it is, I just reread the OP)??

author: vinovino
author_rank: Contributor
timestamp: December 13, 2024, 08:48:53 am
content: Attached is another view of the board with the FL14.FL14 1st and 3rd pin are normally shorted then it became shorted to GND (2nd pin) causing the F2(400mA fuse) became defective.Connector J3 have a cable with approximately 400mm long that came from the secondary side of the instrument transformer.Also the voltage that pass thru the F2 fuse is around 28VDC and 23VAC.

author: coromonadalix
author_rank: Super Contributor
timestamp: December 13, 2024, 12:48:41 pm
content: do you have access to an lcr meter ?
need help identifying component labeled 4901 rh45 on AMD RX Vega 56 - Page 1
Forum section: electronics / repair

author: hercegovac
author_rank: Contributor
timestamp: June 08, 2019, 03:18:53 am
content: need help identifying component labeled 4901 rh45 on AMD RX Vega 56

author: LateLesley
author_rank: Frequent Contributor
timestamp: June 08, 2019, 11:26:12 am
content: Going by the Q-labeling and closeness to an inductor, i'm gonna guess that it may be a MOSFET, possibly this one -https://www.onsemi.com/pub/Collateral/NTMFD4901NF-D.PDF

author: hercegovac
author_rank: Contributor
timestamp: June 08, 2019, 01:54:20 pm
content: I hoped that was the right part until after I removed it from the PCB, the pinout on the bottom does not matches the spec sheet drawing

author: hercegovac
author_rank: Contributor
timestamp: June 08, 2019, 02:00:27 pm
content: Also it is much smaller that typical mosfet used on GPUs

author: LateLesley
author_rank: Frequent Contributor
timestamp: June 08, 2019, 03:31:36 pm
content: It's just a slightly different footprint of the same type I think. (But I haven't looked over all the specs. )https://uk.farnell.com/on-semiconductor/ntlld4901nftwg/mosfet-n-ch-30v-9-5a-8wdfn/dp/2216673(EDIT : the current capacity is smaller)
Need Help Identifying Component with ID '5ACRPT' SOT-26 - Page 1
Forum section: electronics / repair

author: fmashockie
author_rank: Frequent Contributor
timestamp: May 08, 2024, 03:31:38 am
content: Hey y'all! I am having trouble identifying this IC (photo attached). It has '5ACRPT' on it with a dot under the '5' and another dot underneath the 'R'. Cannot find anything on it online. At first I thought it might be a power managerment or AC/DC converter IC, but now I am not so sure.It is on the PCB for a LogicData SMARTneo motor controller box for a sit-stand desk. Would really appreciate anyone's help!Thanks!-Frank

author: fzabkar
author_rank: Super Contributor
timestamp: May 08, 2024, 04:17:01 am
content: 5AC = NCP1251ASN100T1Ghttp://markingcodes.com/search/c/5achttps://www.onsemi.com/pdf/datasheet/ncp1251-d.pdf(datasheet)https://help-master.com.ua/ua/p583800134-mikroshema-ncp1251asn100t1g-tsop.html(photo)

author: fmashockie
author_rank: Frequent Contributor
timestamp: May 08, 2024, 07:52:44 am
content: Wow thank you so much fzabkar! I did not come across markingcodes.com in my searches. All the other smd code sites I tried did not come up with this little guy when searching '5AC'. So I will definitely keep this site in mind for the future.Thanks again!

author: RoGeorge
author_rank: Super Contributor
timestamp: May 08, 2024, 08:34:56 am
content: Another big database:https://smd.yooneed.one/