hybridfree/eevblog-posts huggingface dataset:
help identify lcd - Page 1
Forum section: electronics / repair

author: 1kostik1976
author_rank: Contributor
timestamp: October 03, 2021, 04:49:55 am
content: hello.flir c2. thermal imager.lcd crush.can't find such a new one.I hope someone can identify this LCD.3.5"

author: amyk
author_rank: Super Contributor
timestamp: October 03, 2021, 07:18:43 am
content: I think this is the company that made them:https://shtdo.en.alibaba.com/But it's likely to be a custom part, maybe you could ask them for some info - rate of success is unlikely to be high, but it's worth a try.

author: lunacyworks
author_rank: Contributor
timestamp: October 24, 2021, 06:24:20 pm
content: So you are looking for a WxH capacitive (6pin) touch screen QVGA (50 Pin) LCD screen. I believe if you search for the actual part you might find that will narrow your list down significantly. Since the LCD doesn't seems to come with a controller, I would check the main board and see if you can determine what controller they use. You might find it easier just to source a compatible unit instead of a direct replacement.

author: wraper
author_rank: Unknown
timestamp: October 24, 2021, 06:33:21 pm
content: Quote from: lunacyworks on October 24, 2021, 06:24:20 pmAnd how you determined that? TFT LCD without a controller? It's either COG of located further on a hidden part of FPC.

author: lunacyworks
author_rank: Contributor
timestamp: October 24, 2021, 06:39:55 pm
content: I should clarify when I was speaking of a controller I wasn't referring to a COG or driver, but a controller that would interface with the driver. Having a controller on the LCD would mean that it was a custom assembly and would make it even harder to find a replacement.Looking at the FPC cable, U1 could be a controller yes, but that is more likely to be the touchscreen controller probably an FT6236ish type controller like this [https://www.buydisplay.com/3-5-inch-capacitive-touch-panel-wiith-controller-ft6236-for-320x480-dots]. I would assume there would the a LCD driver (such as He would have to trace the wires. It's not uncommon for companies to use older connectors such as the 50 LCD connector typical of an 6800-series parallel interface or8080-series high speed parallel interface verse using the same connected and repurpose the lines for 3-lines serial peripheral interface and 4-lines serial peripheral LCD screen.I have used for examplehttps://www.crystalfontz.com/to get a replacement LCD working with some units where I didn't know what the actual OEM product was.By comparing to say the interface table they supply you get a sense as to what the specs for this particular LCD might be.https://www.crystalfontz.com/products/document/2236/CFAF320240F_Series_Interface_Table.pdfSo if were to map out the connector and give us a clear picture of U1 we might be able to narrow down the interface required and make it easier to source an equivalent replacement.
help identify microwave transistor marking code 0x or 0r - Page 1
Forum section: electronics / repair

author: mrf245
author_rank: Regular Contributor
timestamp: May 10, 2019, 03:21:27 pm
content: HelloI found there is a transistor marking code "0r" in my microwave VCO box, which output freq 1 to 2 GHz.Another box the same transistor code is "0x".Anyone can help to find out what's this? Thanks.

author: mrf245
author_rank: Regular Contributor
timestamp: May 14, 2019, 07:12:06 am
content: I can reply by myself.It's NE85635/2SC3603, has multiple suffix like 0k, 0x or 0r, etc. It's similar to 2SC3355 only different package.
help identify missing components agilent u1242b - Page 1
Forum section: electronics / repair

author: Syzeryuino
author_rank: Contributor
timestamp: January 23, 2021, 08:16:56 pm
content: Hello i was given by someone a u1242b from someone and says that its not accurate. after inspecting it a few components are missing mainly the one in these photos.i wasnt able to get a clear picture from the pictures on the internet. can anyone with similar multimeter help me?its the resistor and the diode. though i wont expect anything from the diode cause its so small!
Help identify my usb connector on my laptop so i can buy a replacement - Page 1
Forum section: electronics / repair

author: spaceship9876
author_rank: Newbie
timestamp: November 12, 2023, 04:13:00 pm
content: I have attached some photos of a usb3 port that i need a replacement of. Some of a usb cable connector have become stuck inside the port so i want to order a new port to solder on my laptop pcb.ThanksCCM is stamped on the connector, i assume that is the manufacturer. The code C1628 or C1620 is printed on the connector too. I tried googling the code and stamp to no avail. I think the code is the date of manufacture.

author: madires
author_rank: Super Contributor
timestamp: November 12, 2023, 06:15:14 pm
content: Finding the exact connector model could be very hard. I'd look for a connector with the same dimensions, pin layout and mounting tabs. Or you could buy a set with 10 or more common connector models if you need to replace USB connectors from time to time.

author: spaceship9876
author_rank: Newbie
timestamp: November 12, 2023, 07:41:50 pm
content: update: found one by entering my laptop model and "usb connector" on aliexpress.

author: wraper
author_rank: Unknown
timestamp: November 12, 2023, 08:06:19 pm
content: Quote from: spaceship9876 on November 12, 2023, 07:41:50 pmMeasure actual dimensions. Similar look can be misleading, such connectors come in different mounting depth variants (will fit on PCB but not enclosure) and mounting tab locations can be slightly different too. Also be aware to not buy connector that is rotated by 180ointernally.
Help identify scratched IC - Page 1
Forum section: electronics / repair

author: soswow
author_rank: Newbie
timestamp: August 31, 2019, 10:06:22 am
content: I have this broken Dyson fan I wanted to look inside and find if I can fix it. I found a board with clearly burned components. I've cleaned them up with alcohol from soot, and then used methylated spirits to remove close varnish from burned components. IT was removing well from those what I think diodes and IC next to them with a hole in it, but it was too slow. So I tried to use the blade to scrape it off. It worked well with diodes, but I F*ed IC and scraped markings partially away. =(((Now I am trying to decode what I can, but can't google partial info I have good enough.I thought maybe some of you can easily identify it ... like "Oh, sure, bud, this is voltage regulator S01dkd - very popular component" =)Find the Best photos I could make. Last one (chip5.png) has an overal picture of the burned section.

author: CrazyTiger
author_rank: Regular Contributor
timestamp: August 31, 2019, 10:26:37 am
content: I think this might be a LNK 304:http://www.mouser.com/ds/2/328/lnk302_304-306-179954.pdf

author: soswow
author_rank: Newbie
timestamp: August 31, 2019, 11:49:10 am
content: Thank you! yeah, it looks pretty much like it, and it makes sense to have in this consumer product.Now, I am not sure if I need to replace those diodes ... before I cleaned it up soot was all over between those diodes. But after cleaning it looks like they look all right.I am I right to assume that those are of this type:https://www.diodes.com/assets/Datasheets/ds16005.pdf?

author: narkeleptk
author_rank: Contributor
timestamp: August 31, 2019, 05:57:47 pm
content: I would not be concerned about those diodes at this time unless one is directly connected to that inputs/outputs of that IC that blew.

author: L_Euler
author_rank: Regular Contributor
timestamp: September 03, 2019, 12:28:36 pm
content: Wipe a very thin film of heat sink grease across the lettering.

author: soswow
author_rank: Newbie
timestamp: November 18, 2019, 09:35:23 am
content: After replacing IC it didn't turned on. I should probably bin it.

author: shakalnokturn
author_rank: Super Contributor
timestamp: November 18, 2019, 06:00:52 pm
content: LNK series are good at popping themselves.Usually they'll take (a fuse if there is one) a fusible resistor or inductor with them.Check diode bridge. Then continuity between bulk capacitor positive and LNK Drain pin, between bulk capacitor negative and LNK Source pin.
Help identify SMD - Page 1
Forum section: electronics / repair

author: funky2x
author_rank: Contributor
timestamp: May 26, 2025, 04:56:55 pm
content: Need help identify this blown component i Harman kardon onyx studio 7.

author: Pinkus
author_rank: Frequent Contributor
timestamp: May 26, 2025, 05:16:10 pm
content: Voltage detector IC?https://smd.yooneed.one/code5930.html#code593044
Help identify Sot-23 part number marking starting with "E4" or "F1" - Page 1
Forum section: electronics / repair

author: varnasfix
author_rank: Newbie
timestamp: October 20, 2024, 11:03:19 am
content: Hello everyone!I have "boiled" my head trying to identify a Sot-23 part from a pcb driving an IGBT module on an inverter.In different production batches they have used two different sot-23 parts so there are two markings starting with "E4" or "F1" to help identify the part number.Also in both occasions the part appears on the pcb both pins 1 & 2 are connected which would indicate towards a dual diode. However if we measure between pins 1 & 3 there is a diode in both ways...Both transistor LCR testers I have don't even recognize it and message "part unknown ..." appears.There are photos of both places that the part is used on the pcb.Thank you!

author: fzabkar
author_rank: Super Contributor
timestamp: October 20, 2024, 04:59:52 pm
content: E4xx = SPX2431AM, 2.5V precision voltage referencehttps://www.maxlinear.com/ds/spx2431.pdfhttps://www.lcsc.com/datasheet/lcsc_datasheet_1810010516_MaxLinear-SPX2431AM-L-TR_C94430.pdf(Sipex)https://pt.aliexpress.com/item/1005006330033066.html(photo)https://www.lcsc.com/product-detail/Voltage-Reference_MaxLinear-SPX2431AM-L-TR_C94430.html(datasheet & photo)F1xx = SPX2431AMhttp://eric1688.com/mobile/product.aspx?id=390287(photo)

author: varnasfix
author_rank: Newbie
timestamp: October 20, 2024, 10:39:00 pm
content: Thank you so much. You are an absolute legend!I must have gone through dozens and dozens of datasheets without any results

author: fzabkar
author_rank: Super Contributor
timestamp: October 20, 2024, 11:15:37 pm
content: Quote from: varnasfix on October 20, 2024, 10:39:00 pmI didn't have any luck with datasheets, either. Instead, I resorted to Google Images and an Aliexpress search (with images).

author: davedrosen
author_rank: Newbie
timestamp: October 20, 2024, 11:27:05 pm
content: Hi, This is my first post. There is handy app called SMD. You put in the code and it lists the devices.

author: varnasfix
author_rank: Newbie
timestamp: October 22, 2024, 08:05:30 am
content: Thank both of you for the sharing the methodology.Never thought of Google images.It is indeed a great tool for as it "reads" text and numbers from the images. Very nice.
help identify sot23-6 burned smd component from a Hornby locomotive decoder - Page 1
Forum section: electronics / repair

author: kripton2035
author_rank: Super Contributor
timestamp: February 22, 2021, 07:17:49 pm
content: Hi everyone,I'm looking for the ref of the burned component (see picture)the marking on it seems "H4" or "H47" ?there are 4 identical circuits on this board marked the same. on a working board, the burned chip is the same as the 4 others "H4"it comes from a Hornby "4 channels locomotive decoder"I presume it's some mosfet, but which one ?I you have any idea it would be much appreciated.thanks.

author: Gyro
author_rank: Super Contributor
timestamp: February 22, 2021, 09:22:24 pm
content: My usual search pages pull up a Rohm EMH4 dual digital transistor or equivalent as a possibility. Edit: That might make sense as it looks like the sort of application where they need to keep the parts count down.

author: kripton2035
author_rank: Super Contributor
timestamp: February 22, 2021, 10:20:08 pm
content: thanks it seems to be that part.helas, you must buy them in 3000 qty ... even with shipping in smaller quantities it's still the same price as a new hornby device ...

author: Gyro
author_rank: Super Contributor
timestamp: February 22, 2021, 10:36:09 pm
content: You could maybe bodge it with a couple of air-wired SOT23 transistors and a few resistors (actually, just 2 10k base resistors) - assuming you can work out why it blew!.Edit: The package contains two separate dies and it looks as if only one of them smoked.

author: fzabkar
author_rank: Super Contributor
timestamp: February 22, 2021, 10:37:17 pm
content: http://www.smdmark.com/en-US/search/code?id=h4There are three package styles:http://rohmfs.rohm.com/en/products/databook/datasheet/discrete/transistor/digital/emh4t2r-e.pdfThis one is available in single quantities:https://www.digikey.com/en/products/detail/rohm-semiconductor/UMH4NFHATN/10709440

author: kripton2035
author_rank: Super Contributor
timestamp: February 23, 2021, 11:14:46 am
content: found it on lcsc in 10 qty ! and more than reasonable price.https://lcsc.com/product-detail/Transistors-NPN-PNP_Nexperia-PUMH4-115_C455002.htmlps: digikey asks for $22 to ship 1 ic to europe ...
Help identify switch output enable switch  for Farnell AP6050 PSU  - Page 1
Forum section: electronics / repair

author: aqibi2000
author_rank: Regular Contributor
timestamp: October 09, 2021, 06:00:24 pm
content: Have a Farnell AP60-50 Power supply, the output enamel switch was sticky, as I removed the cover I found an internal spring broken (BER).Can someone please help identify what type of switch this actually is, believe it was a latching typeThere are 8 pins for the mounting and internally I can see 8 individual contacts… 4PDT???The brand of the switch is MEC.Thanks!

author: aqibi2000
author_rank: Regular Contributor
timestamp: October 09, 2021, 06:06:49 pm
content: I’m under the assumption it is called a 15.551 switch based upon colour

author: aqibi2000
author_rank: Regular Contributor
timestamp: October 09, 2021, 06:23:03 pm
content: Managed to fix the switch so it works when I hold it in (latching function does not work because the flexible metal pin is broken which is also why it was sticky)

author: aqibi2000
author_rank: Regular Contributor
timestamp: October 09, 2021, 08:11:19 pm
content: Ordered a 15451 which is a high temperature version of the 15551.Any ideas if this is the right one, it’s Circuit: 4PST-2NO/2NChttps://www.ebay.co.uk/itm/SWITCH-PUSH-4PST-0-25A-120V-/124340016475?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l6249&mkrid=710-127635-2958-0

author: aqibi2000
author_rank: Regular Contributor
timestamp: October 16, 2021, 10:25:11 am
content: No one?
Help identify the chip - Page 1
Forum section: electronics / repair

author: daisizhou
author_rank: Super Contributor
timestamp: March 28, 2021, 01:56:07 pm
content: I am repairing a circuit board，Found a DIP16 chip.The photo is shown below, who can tell me the exact model,I want to find its data sheet

author: gamalot
author_rank: Super Contributor
timestamp: March 28, 2021, 02:40:29 pm
content: It's a resistor network.

author: fzabkar
author_rank: Super Contributor
timestamp: March 28, 2021, 05:49:09 pm
content: The logo belongs to Beckman Industrial.Something like this ...https://www.silicon-ark.co.uk/898-1-r680-resistor-network-by-beckman-idustrialhttps://www.silicon-ark.co.uk/datasheets/898-1-resistor-networks-datasheet-beckman.pdfhttps://www.electronicsurplus.com/bi-beckman-1698-66-0-resistor-network-package-of-25

author: daisizhou
author_rank: Super Contributor
timestamp: March 28, 2021, 11:27:02 pm
content: thank you for your reply,I mistakenly thought it was a chip
Help identify the purpose of a potentiometer - Page 1
Forum section: electronics / repair

author: dark_hawk
author_rank: Regular Contributor
timestamp: September 11, 2020, 08:22:15 am
content: Hi,Hi. I have a Proskit SS-989B rework station. The hot air handle was old and broken so I replaced it with the Proskit handle model 9SS-900NB-HG which is supposedly for a different model. Problem is they are a bit different in regard to resistance of the heating element, and I need to calibrate the station.Calibraion is done by two potentiometers, RH1 and RH2.When I tweak RH1 is changes actual temperature of the air, RH2 changes also the temperature but by a lower margin per turn than RH1.Question is, what is the purpose of RH2?

author: MarkF
author_rank: Super Contributor
timestamp: September 11, 2020, 11:51:21 am
content: What you have just described is coarse and fine adjustment.Does RH1 happen to be five to ten times bigger than RH2?Chances are, they are wired in series.

author: dark_hawk
author_rank: Regular Contributor
timestamp: September 12, 2020, 08:11:39 am
content: Quote from: MarkF on September 11, 2020, 11:51:21 amThanks for the reply.They are not in series. I've contacted the company and they replied at last, RH1 is temperature adjust and RH2 they call Amplifier and suggest to set to zero. Not sure what that one is doing exactly.
Help Identify this Diode Please - Page 1
Forum section: electronics / repair

author: andybarrett1
author_rank: Regular Contributor
timestamp: October 28, 2020, 04:29:34 pm
content: Hi AllLooking to Identify this SMD Diode V25I can Make out 137 UM and manufacturer logo but it doesnt mean muchHelp AppreciatedThank You

author: fzabkar
author_rank: Super Contributor
timestamp: October 28, 2020, 06:30:40 pm
content: SMAJ15CA, Diodes Inc, bidirectional 15V TVS diode, marking UM:https://www.diodes.com/assets/Datasheets/ds19005.pdf

author: andybarrett1
author_rank: Regular Contributor
timestamp: October 29, 2020, 08:24:03 am
content: Quote from: fzabkar on October 28, 2020, 06:30:40 pmThank youHad me fooled :-)Andy
Help identify this error code in aifen a9 plus soldering iron  - Page 1
Forum section: electronics / repair

author: abdolah
author_rank: Regular Contributor
timestamp: March 04, 2025, 04:17:48 am
content: Hi guys I have a problem with my soldering iron that I just boutI was working with t210 handle and it worked fine but when I needed to connect the t115 handle the station gives an error code h-a with constant beebing , and If I trun it off and on again with the t115 handle with the tip is gives error code s-e Wich mean to put the tip , but if I do it it gives the h-a code again and if I restarted the station with the tip in it , it keeps restarting the stationPlease help I just bought it week ago the tip is new and the handle and the station

author: Swake
author_rank: Frequent Contributor
timestamp: March 07, 2025, 08:44:39 am
content: Well... I could not find a manual or user guide for this thing, not even a Chinese one.Is the T210 still working normally?If it is I would think of an issue with the T115 handle or the T115 tip. Can you test with another T115 tip?Attached the pinout for the original JBC handles. I cannot tell you if the Aifen is the same, however they will at least have something similar.As you can see from the attached pictures of a Aixun T115 the handle is nothing more than a plug with a resistor and some wires. You can probe all that with a multimeter. The metal ring that makes contact with the holder can be unscrewed.

author: abdolah
author_rank: Regular Contributor
timestamp: March 08, 2025, 08:42:10 am
content: Thanks for your helpI did order another c115 handle and tip but the seller did say that aixun t115 handle is not compatible withe aifen a9 plus and nowI'm waiting for it to arrive, then I will try and I will inform you about itThanks again for your help, I really appreciate you

author: abdolah
author_rank: Regular Contributor
timestamp: March 13, 2025, 08:25:16 pm
content: Hi , I got the c115 handle and it works fine nowI guess aixun handle is not compatible with aifen

author: Swake
author_rank: Frequent Contributor
timestamp: March 13, 2025, 08:36:13 pm
content: Thanks for the feedback.I'm not surprised. I ordered several Aixun handles and one came with an entirely different connector.You might want to compare how the wires are connected in the plug and then make it work.

author: abdolah
author_rank: Regular Contributor
timestamp: March 13, 2025, 08:44:39 pm
content: Yeah It's annoying , they can't even agree on wiring the handle connector
Help identify this ic - Page 1
Forum section: electronics / repair

author: abdolah
author_rank: Regular Contributor
timestamp: February 05, 2024, 04:31:34 pm
content: a74j01 is an ic in PSUThe PSU MODEL IS : evga supernova nex650gI CAN'T find the service manual or schematic for itLeg number 5 & 6 are shorted internally in the ic it makes the PSUSTART on it's own not waiting for the pson signal to come

author: CDaniel
author_rank: Frequent Contributor
timestamp: February 05, 2024, 08:08:23 pm
content: https://www.fsp-group.com/en/knowledge-wpr-22.html#thirteenMore than this I can't find , 6601 is basically the code

author: magic
author_rank: Super Contributor
timestamp: February 05, 2024, 08:22:28 pm
content: I have no idea where I found this...As you see, it's a synchronous rectification controller for 12V/5V output forward topology with added regulated 3.3V buck controller.No pin numbers, sorry, you will have to figure it out from the PCB.

author: fzabkar
author_rank: Super Contributor
timestamp: February 05, 2024, 09:26:30 pm
content: https://www.fsp-ps.de/de/news-102.htmlhttps://vlab.su/viewtopic.php?f=46&t=122815https://i.ibb.co/v10SygD/6601.jpgIt looks like pins 5 & 6 are fed by a Sync winding on the transformer.

author: abdolah
author_rank: Regular Contributor
timestamp: February 06, 2024, 12:34:50 am
content: Ok thanks I will try to reverse engineering it .

author: abdolah
author_rank: Regular Contributor
timestamp: February 06, 2024, 12:37:39 am
content: Yeah that help a lot actually thanks

author: abdolah
author_rank: Regular Contributor
timestamp: February 06, 2024, 01:27:57 am
content: Thanks so much for your help .
Help Identify this Mosfet or Transistor - Page 1
Forum section: electronics / repair

author: kazzle101
author_rank: Contributor
timestamp: October 26, 2021, 08:14:31 pm
content: HelloThe small cheap power supply for my netgear switch has had a crisis. It looks like a 10uF capacitor has given up and taken the main mosfet/transistor out with it. Its in a TO-126 package on the mains side of the switch mode power supply and I can see part of a logo and the number 13, the rest has been wiped out by the crater left from 'the event', I've attached a picture.An S8050 transistor got took out too.PSU Part Number: 332-10115-01Input: 220-240V ~Output: 12V DC at 350mAAny ideas?ThanksKarl.

author: PartialDischarge
author_rank: Super Contributor
timestamp: October 26, 2021, 08:20:12 pm
content: It’s problably a bipolar from the mje13000 series, 13003..you can use a st13003 for replacement

author: rvalente
author_rank: Frequent Contributor
timestamp: October 26, 2021, 08:51:13 pm
content: I'd go for the MJE13009?...Just teardown an old electronic ballast and salvage it..

author: kazzle101
author_rank: Contributor
timestamp: October 27, 2021, 08:32:47 am
content: Thanks for that,I have ordered 20 x MJE13003 mostly because they were the cheapest, along with 10 x S8050 and some capacitors.At least I'll have sparesKarl
Help identify this part - Page 1
Forum section: electronics / repair

author: reflection
author_rank: Newbie
timestamp: March 20, 2022, 05:54:00 pm
content: Hello everyone! First post for me as I was searching for answers and discovered this forum.I have a Cisco switch that was dropped. The power corded was still connected and got pushed in. I opened it up and looks like a couple film capacitors broke off which I can replace. However, there is a part that I'm trying to figure out what it is and where to get a replacement for it. Attached is a picture of the broken piece, as well as what was inside it, as well as a picture of a similar component that was still intact. It is labeled as "G" and "GT", but I don't know what "G" or "GT" is. The closest I could find doing searches was a GDT, but the pictures of GDTs don't look similar. And what do the color codes mean? The colors are red, black, green (with a larger gap between red and black). See picture.Any ideas much appreciated. Thanks!

author: fzabkar
author_rank: Super Contributor
timestamp: March 20, 2022, 07:04:50 pm
content: It looks like a gas discharge arrestor. If so, then the device will work without it.https://www.ipros.jp/product/detail/2000308655

author: reflection
author_rank: Newbie
timestamp: March 21, 2022, 03:08:55 am
content: Are there safety concerns if I omit this component? I'm hoping to find a replacement part and solder it on.What does the color code represent?

author: tooki
author_rank: Super Contributor
timestamp: March 21, 2022, 10:53:36 am
content: The gas discharge tube is just protection against surges and the like, so without it, the device is simply a bit more susceptible.I did a Google image search for “ gas discharge surge arrester glass axial” and came across a listing for “RLS302 series” which look very much like yours (in particular, the color band spacing). Searching for that in turn took me to this manufacturer site:http://ruilon.com/plugin_series/show/227.htmlUnfortunately their datasheets don’t list the color codes, and none of the values unambiguously align with the numeric values of the bands (5-0—2 or 2—0-5). Maybe shoot them a message with the photo and accurate (caliper) measurements of the intact device.

author: james_s
author_rank: Super Contributor
timestamp: March 21, 2022, 06:53:02 pm
content: It's just a surge protector, personally I'd just leave it out, but if you want to replace it you should be able to use anything with specs that are appropriate for the line voltage.
Help identify TSSOP-8 chip - Page 1
Forum section: electronics / repair

author: ARF
author_rank: Regular Contributor
timestamp: June 25, 2024, 01:04:19 pm
content: Hi guys,I'm repairing NEC thermal camera TVS-8502.The one of tantalum capacitors is shorted, and the chip in TSSOP-8 case is damaged on the rail with this capacitor.The case is damaged, but the board has the same ICs.The chip has Siliconix like mark. Top marking is "543A". ~1995 production yearPinout:1 Power rail 1 +2 GND3 GND4 ??5 ??6 Power rail 2 +7 Power rail 2 +8 Power rail 1 +dual FET?FOUND: Si6543DQ

author: fzabkar
author_rank: Super Contributor
timestamp: June 25, 2024, 04:23:12 pm
content: Si6543DQ, Vishay/Siliconix, Dual N- and P-Channel 30-V (D-S) MOSFET, TSSOP-8:https://web.archive.org/web/20010620082030/http://www.vishay.com/docs/70181.pdfSi6954ADQ, Vishay/Siliconix, Dual N-ch MOSFET, 53mOhm @ 3.4A, 10V, 30V, TSSOP-8:https://www.vishay.com/docs/71130/71130.pdfSi6954DQhttp://www.mouser.com/ds/2/427/70179-279753.pdf
Help Identifying 0805 Resistor Value - Page 1
Forum section: electronics / repair

author: AstutePauciloquent
author_rank: Contributor
timestamp: December 03, 2024, 10:49:26 pm
content: Hello Everyone, I have been diagnosing this 600Watt PSU. After removing 2 blown Mosfets, I also discovered some blown resistors, and some other resistors that have had their value changed. Such as the two lower 103 in this pic, they should have a resistance value of 10K Ohms but they only read 110 Ohms. I'm confident in Identifying and replacing the faulty 0805 resistors with the values written on them, but what are these resistors that I have drawn a red box around? They all measure as 100 Ohms, but there are others with different values around the board, and seeing that some of these resistors have had there value changed, I can't really trust there measured resistance.This is such a great resource full of highly knowledgeable people, and it is an honer to be part of this community, thank you in advance.

author: coromonadalix
author_rank: Super Contributor
timestamp: December 04, 2024, 02:11:07 am
content: i would have said diodes, try testing them in diode mode both ways

author: AstutePauciloquent
author_rank: Contributor
timestamp: December 04, 2024, 02:40:05 am
content: Quote from: coromonadalix on December 04, 2024, 02:11:07 amTested them in diode mode, both ways they do not behave like diodes

author: Whales
author_rank: Super Contributor
timestamp: December 04, 2024, 04:01:50 am
content: Quote from: AstutePauciloquent on December 04, 2024, 02:40:05 amIt's in parallel with a 100ohm or 1k-ohm resistor (marking "1000") next to it. You will need to remove the diode from the circuit to measure it properly.

author: AstutePauciloquent
author_rank: Contributor
timestamp: December 04, 2024, 07:21:16 am
content: Quote from: Whales on December 04, 2024, 04:01:50 amYes I see thanks, they are indeed diodes!

author: pcprogrammer
author_rank: Super Contributor
timestamp: December 04, 2024, 07:35:57 am
content: Quote from: AstutePauciloquent on December 03, 2024, 10:49:26 pmIf you measure components in circuit the values depend on what the rest of the circuit is. Just like with the diodes you have to take the components out to get an accurate reading.

author: fzabkar
author_rank: Super Contributor
timestamp: December 04, 2024, 08:13:58 am
content: Quote from: AstutePauciloquent on December 03, 2024, 10:49:26 pmWhen resistors fail, they usually increase their resistance or go open circuit. It would be very unlikely for the resistance to be lowered. Instead, there must be a low resistance path in parallel with these 10K resistors.
Help identifying 1206 SMD polyswitch? (Resolved) - Page 1
Forum section: electronics / repair

author: benj38
author_rank: Frequent Contributor
timestamp: February 29, 2020, 02:09:29 pm
content: Can anyone please help identify the following 1206 SMD component?The component name on the PCB is "R25" so it is almost certainly a resistor (correction: following @daqq observation, this is actually almost certainly a polyswitch!). However, I have never seen such a code before.Also, is the first letter a lowercase "a" or the Greek letter alpha?

author: daqq
author_rank: Super Contributor
timestamp: February 29, 2020, 02:24:36 pm
content: Looks more like an SMD polyswitch.

author: benj38
author_rank: Frequent Contributor
timestamp: February 29, 2020, 04:11:24 pm
content: Some digging in Alibaba yielded the following match:A polyswitch (thanks @dqqq) made by JDTFUSE in China. 0.75A, 6V Part #ASMD1206-075.Circuit measurement seems to agree with a maximum current draw of 0.6A.
Help Identifying 110-080 / 110-081 SMD Component Possibly MOSFET or Optocoupler - Page 1
Forum section: electronics / repair

author: RaymondRosas
author_rank: Contributor
timestamp: June 23, 2025, 03:36:59 am
content: Hi everyone,I’m currently troubleshooting a Meggitt module used in a Solar Turbines VL4000S fuel valve actuator. I found two SMD components with the following markings:110-080 2039110-081 1913Both parts have a 5- or 6-pin SMD package (looks like a DFN or QFN type) with a marking that resembles a MOSFET symbol (inverted triangle with a bar above). Here's a photo:There is no reading at all across any pin in diode or resistance mode using a multimeter. I was initially thinking it could be a MOSFET (used for switching solenoids/valves), but I’m also considering the possibility it might be a custom IC or optocoupler. Markings on the PCB near one part are labeled RN6 and RN5.Has anyone come across these parts before? Are they standard MOSFETs with internal markings, or custom/proprietary parts from Meggitt? Any known replacements or equivalents would be a huge help.I'm looking for any of the following:Datasheet (or partial specs like Vds, Rds(on), gate voltage, etc.)Replacement/equivalent components I can use for repairAny insight from someone who’s worked with similar parts or Meggitt hardware would be greatly appreciated.Thanks in advance!

author: squadchannel
author_rank: Frequent Contributor
timestamp: June 23, 2025, 04:22:19 am
content: RN is resistor network. maybe Vishay CSO. Custom parts, no document.

author: fzabkar
author_rank: Super Contributor
timestamp: June 23, 2025, 06:17:55 am
content: It does look like Vishay.https://www.eeweb.com/dual-in-line-thin-film-resistor-networks/
Help identifying 6360 X1944 USB Power Controller (QFN-40) - Page 1
Forum section: electronics / repair

author: JusTideaFIX
author_rank: Contributor
timestamp: October 25, 2023, 01:54:16 pm
content: Please help me determine the model of the ICUSB power controllerand find the datasheet.Marking 6360 X1944Installed in the power circuit of a mini PC M6 (Morefine) single-board computerbetween the USB Type-C input and secondary power circuits.According to one of the protocols (QC or PD), it requests 12 Volts from the USB source.Without IC directly from 12 V the PC works. But of course, it can no longer work from Powerbank (it could before the breakdown).Pinout:17 Type-C CCx USB Power Derivery Communication Line (5 kOhm Pull Down)20 Type-C CCx USB Power Derivery Communication Line (5 kOhm Pull Down) other side of USB-C21 GND23 USB 2.0 Type-C Data24 USB 2.0 Type-C Data25 GND26 GND27 GND36 Vin from USB Type-C VBUS38VinSense (Feedback)? 100 Ohm Type-C VBUS40 GND

author: fzabkar
author_rank: Super Contributor
timestamp: October 25, 2023, 10:12:01 pm
content: This IC doesn't appear to have high power inputs and outputs, in which case it can't be a power switch. There is a 100 ohm resistor in series with Vcc, so it is clearly a low power device. Moreover, I'm wondering what is involved in "power control", since the AC adaptor appears to be a fixed 12VDC / 3A device. :-?BTW, I'm wondering whether D18 is reserved for a 12V TVS diode. If so, then it could have saved the IC.FWIW, here are the FCC filings:https://fccid.io/2AM5Z-M6

author: JusTideaFIX
author_rank: Contributor
timestamp: October 26, 2023, 11:00:31 pm
content: Quote from: fzabkar on October 25, 2023, 10:12:01 pmYes, I was wrong. Already corrected pinoutQuote from: fzabkar on October 25, 2023, 10:12:01 pmCorrect, AC adaptor fixed 12VDC. A faulty chip is needed to work from USB smart chargers and powerbanks.Quote from: fzabkar on October 25, 2023, 10:12:01 pmI think yes. This would prevent damageQuote from: fzabkar on October 25, 2023, 10:12:01 pmUnfortunately this information is useless to me.Image of the board without a chip:

author: fzabkar
author_rank: Super Contributor
timestamp: October 26, 2023, 11:25:58 pm
content: I was looking at the internal photos of the PCB, trying to identify the manufacturers of the other chips. Most of the chips seem to be sourced from mainstream manufacturers. However, the audio chip (CJC6811A) was manufactured by Wuhan Guanghuaxin Technology. I can't find any information about this company, let alone their web site.This blog discusses the IC:https://inf.news/en/digital/a9f10f6d6bc93fe4f632ffb8263ad0d9.htmlAlso, there is a network IC with an "Intel" marking which I cannot find anywhere.Therefore, I suspect that your mystery IC could be some "off-brand" part.

author: coromonadalix
author_rank: Super Contributor
timestamp: October 27, 2023, 05:05:25 pm
content: seeing the surface chipcould be a rebrand, have you tried acetone of strong cleanup stuff ?? to see if its just some " paint job masquerade ? "
Help identifying a component - CCH 531 - Page 1
Forum section: electronics / repair

author: Nexxen
author_rank: Regular Contributor
timestamp: March 19, 2023, 12:05:12 am
content: Hello,I am currently trying to find what a dead component is, as the name is just a code and I can't figure it out.CCH (with a line above the letters) followed by 531.It provides BIOS with its voltage, 1.8V. See attached pictures to better understand. The board is a modern AM4. Something blew and took with it this CCH, and some multiplexer chips (ASM1480).Measurements were taken with the baord without CPU (it wouldn't power on as the bios is missing and can't go on)/RAM... nothing in the slots either.Powers on without a cpu, won't if installed, typical behaviour I already had with other mobos from the same vendorI can't explain the 0.02V, take it for what it is.I'm not a tech savvy, just an amateur (very amateur) trying to repair as much as possible.Thanks for ny help,Nexxen.

author: fzabkar
author_rank: Super Contributor
timestamp: March 19, 2023, 12:58:01 am
content: A thick line is a feature of Monolithic Power ICs."531" could be a YWW (Year/Week) date code.

author: DavidAlfa
author_rank: Super Contributor
timestamp: March 19, 2023, 02:05:39 am
content: MP5077GGhttps://www.aliexpress.com/item/1005003565012317.html

author: fzabkar
author_rank: Super Contributor
timestamp: March 19, 2023, 02:23:22 am
content: I feel so stupid now:http://www.smdmark.com/en-US/search/code?id=ccxhttps://www.monolithicpower.cn/cn/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP5077/

author: Nexxen
author_rank: Regular Contributor
timestamp: March 19, 2023, 03:02:26 am
content: THANKS!!I would have never found it!!
Help Identifying a Dimmer IC – Marking Worn Off - Page 1
Forum section: electronics / repair

author: serco
author_rank: Newbie
timestamp: April 02, 2025, 09:18:32 am
content: Hi everyone,I’m a volunteer at a Repair Cafe, and I’m trying to fix a dimmer in an LED lamp. The issue is that when the lamp is turned on, the output voltage fluctuates. I suspect the problem is with the dimmer circuit, but I can’t identify the IC because the marking has worn off.Does anyone know if this is a common type of IC used in dimmers?Thanks in advance!

author: Zero999
author_rank: Super Contributor
timestamp: April 02, 2025, 10:26:12 am
content: It looks like a switched mode constant current controller. It doesn't regulate the voltage but the current. Have you checked the connections?You really need to reverse engineer the schematic to work out what's going on.
Help identifying a part - Page 1
Forum section: electronics / repair

author: TCPMeta
author_rank: Newbie
timestamp: January 17, 2021, 01:39:23 pm
content: I am trying to repair a Electric Heated Blanket. I found out it was the Thermal Fuse that went open and when I was replacing it there is what looks like a Metal Oxide 1/2 Watt Resistor straddling across it. a few chunks of the body came off of it.The resistor in question has these color bands Gold, Brown, Black and Gold. With my Multi-Meter I'm getting around 1.7 Ohms. Could this be a 1 Ohm or a 0.1 Ohm?From what the Circuit Board looks like the Resistor is having Current pass through and if it gets too hot and reaches the Thermal Fuse it opens.
Help identifying a part - Page 1
Forum section: electronics / repair

author: caius
author_rank: Regular Contributor
timestamp: March 19, 2022, 09:09:34 pm
content: Hi all,I'm repairing a component (SIL11 package coated with epoxy) and I came across a part I'm not able to identify.The part has a SOT23 package like a transistor but it's "naked" with metal exposed (I don't think I have scratched it off while "digging" on the epoxy).I attach a picture.Has anyone idea of what it coud be?Maybe a darlington transitor or an inductor?

author: amyk
author_rank: Super Contributor
timestamp: March 19, 2022, 11:21:06 pm
content: That looks like the leadframe and lower part of the encapsulation, of what could've been a transistor that blew its top off.

author: caius
author_rank: Regular Contributor
timestamp: March 20, 2022, 07:56:07 am
content: Quote from: amyk on March 19, 2022, 11:21:06 pmThank for reply.Yes, probably it's a transistor that I broke the top case of using heat or while 'digging' the epoxy.
Help identifying a part - Page 1
Forum section: electronics / repair

author: daisizhou
author_rank: Super Contributor
timestamp: April 11, 2022, 06:52:52 am
content: Hi allI am repairing a PCB circuit board.I found that this component is very abnormal, but I can't find the exact model, who can tell me the exact model, thanks

author: DavidAlfa
author_rank: Super Contributor
timestamp: April 11, 2022, 11:48:00 am
content: LR745

author: fzabkar
author_rank: Super Contributor
timestamp: April 11, 2022, 04:38:13 pm
content: http://www.smdmark.com/en-US/search/code?id=LR7
Help identifying a part from a Laserjet 4000 / 4050 - Page 1
Forum section: electronics / repair

author: perdrix
author_rank: Frequent Contributor
timestamp: November 15, 2023, 09:56:20 am
content: I'm trying identify a part that I found broken bits of inside my LJ4050. I'd also like to know where it fits. The other parts that were broken (Toner Cartridge access cover, and the Laser Shutter Arm were readily identifiable - even If I can't find the latter).Here' a couple of pix of the largest piece of the broken part I want to identify (the rest are too small to make much sense of):Thanks in advance, David

author: t1d
author_rank: Super Contributor
timestamp: November 16, 2023, 12:25:04 am
content: Looks like you can find the exploded parts diagrams, here:https://www.laserpros.com/technical-resources/printer-parts-diagrams/hp-laserjet-4050-parts-diagramsThe trick is in knowing that exploded views can be found at the repair parts dealers. I searched "lj4050 parts" and found it in two seconds. HTH.
Help identifying a part in GECKO 9911-500188 REV:E from ROCA Jacuzzi - Page 1
Forum section: electronics / repair

author: CharlieD
author_rank: Contributor
timestamp: June 12, 2023, 02:36:28 pm
content: I need to know which component is the U3 of that same board, since it has burned . By chance, does anyone know what component it is. Thanks y'all in advance.

author: fzabkar
author_rank: Super Contributor
timestamp: June 14, 2023, 09:44:50 pm
content: A photo would help.
Help identifying a power connector - Page 1
Forum section: electronics / repair

author: pcee
author_rank: Regular Contributor
timestamp: September 24, 2021, 06:51:21 pm
content: Thanks to everyone last time who helped me identify an unknown component. Now I'm back with a power connector!It's 10-pin, and by my measurements 26mm wide by 4mm high, 2.5mm conductor pitch (possibly 2.54mm?). It looks like a molex of some form, but I got lost in the expanse of their offerings. See the image below.Edit: it also has "TYU" in tiny letters along the bottom.Any leads?

author: DaJMasta
author_rank: Super Contributor
timestamp: September 24, 2021, 08:35:36 pm
content: Googling TYU connector brings you to Tarng Yu Enterprise's webpage which has a product listing. For crimp connectors in 2.54mm or 2.5mm I don't see an obvious match, but maybe they're solder connections or whatnot.Are you trying to replace it? Need a mating connector? If it's the latter, a regular old male 2.54mm header would probably do even if it isn't keyed or locking.

author: TimFox
author_rank: Super Contributor
timestamp: September 24, 2021, 08:43:45 pm
content: With ten pins in a row, you should be able to discern the difference between 2.5 mm pitch (22.5 mm total) and 2.54 mm pitch (22.86 mm total) using a calipers. It is certainly enough to make mating the wrong connectors an unnatural act.

author: pcee
author_rank: Regular Contributor
timestamp: September 24, 2021, 09:39:55 pm
content: Quote from: TimFox on September 24, 2021, 08:43:45 pmGood call, it's definitely 2.5mm pitch.I'm looking for replacement parts both for this connector and the mating connector.

author: tooki
author_rank: Super Contributor
timestamp: September 25, 2021, 02:26:51 pm
content: It’s Molex Mini-SPOX or a clone thereof.
Help identifying a smd component - Page 1
Forum section: electronics / repair

author: davidcoon
author_rank: Newbie
timestamp: September 05, 2022, 06:45:45 pm
content: Can anyone identify this ic? Or even the manufacturer logo? It's a SOT-23 on the signal lines of a CAN bus tx. I looked in several smd marking db's but no luck. Scratching my head bald over this one. Thank you very much! David

author: Andy Watson
author_rank: Super Contributor
timestamp: September 05, 2022, 07:19:02 pm
content: https://assets.nexperia.com/documents/data-sheet/PESD1CAN.pdfMade in Malaysia.

author: davidcoon
author_rank: Newbie
timestamp: September 05, 2022, 07:30:15 pm
content: That's it, thank you! Amazing!Now I'm wondering (out loud) how I could have figured that out myself. None of the databases I looked at list it (yooneed, smd cookbook, etc). Is there another reference I should be using or a magic 8 ball with answers? I'm new at this and still in awe at how much everyone here knows.

author: fzabkar
author_rank: Super Contributor
timestamp: September 05, 2022, 07:37:45 pm
content: Quote from: davidcoon on September 05, 2022, 07:30:15 pmIf it's on a bus, then it's most likely an ESD protection diode or TVS diode, etc.https://www.google.com/search?q=tan+diode&tbs=isz:m,itp:photo&tbm=isch

author: Andy Watson
author_rank: Super Contributor
timestamp: September 05, 2022, 07:45:54 pm
content: Quote from: davidcoon on September 05, 2022, 07:30:15 pmduckduckgo -> "tan sot-23 can bus clamp" returns this link:https://sking.en.alibaba.com/product/60734847166-213826732/Protection_diode_Marking_TAN_SOT_23_24V_SMD_TVS_Diodes_PESD1_PESD1CAN.html

author: davidcoon
author_rank: Newbie
timestamp: September 05, 2022, 08:27:37 pm
content: Thank you both! Lesson learned. I was convinced that the t was a logo so didn't include it in my search. And I stupidly didn't include the keyword "can". So the answer is...search smarter. Feeling rather dumb.
Help identifying a transistor - Page 1
Forum section: electronics / repair

author: decoder_82
author_rank: Regular Contributor
timestamp: June 17, 2022, 11:28:09 am
content: Hi,I have identified a faulty transistor in a monitor (that does not have service manual).As you can see on the picture the exact reference can barely be read. Looks it is written 1594 on the bottom and 832C on top of it.I am wondering what I could use as replacement?

author: DC1MC
author_rank: Super Contributor
timestamp: June 17, 2022, 11:39:52 am
content: IRFBE 30https://www.vishay.com/docs/91118/91118.pdf

author: decoder_82
author_rank: Regular Contributor
timestamp: June 17, 2022, 01:02:06 pm
content: Thanks for you help !
Help identifying a vssop10 IC code XM01 1810 - Page 1
Forum section: electronics / repair

author: BeamDump
author_rank: Contributor
timestamp: September 18, 2024, 07:41:48 am
content: Hi everyoneI have an OBD adapted with an VSSOP10 IC that i have no clue what it is. Code is XM01, 1810. See attached photo.Anyone has any wild guesses what it might be?

author: m k
author_rank: Super Contributor
timestamp: September 28, 2024, 05:42:10 pm
content: My guess is a driver chip.The missing chip can be for a third protocol.How the whole device is connected?
Help identifying an SMD Diode - Page 1
Forum section: electronics / repair

author: ShatteredGlass
author_rank: Newbie
timestamp: January 14, 2023, 05:11:39 am
content: At first I thought it was 5.1B but then after researching, I think it might be S1B which is 1N4002 (100V 1A). Just need someone to confirm. Also not sure what the "13" denotes?

author: gamalot
author_rank: Super Contributor
timestamp: January 14, 2023, 06:39:09 am
content: It's a Rohm's PTZ5.1B Zener diode.https://www.mouser.com/datasheet/2/348/ptz5.1b-210067.pdf

author: gamalot
author_rank: Super Contributor
timestamp: January 14, 2023, 06:46:19 am
content: I found some pictures of compatible PTZ5.1B, although they have "5.1B" top marking, but in some different fonts.Finally I found a picture of this genuine PTZ8.2B, you can clearly recognize that it is a family member of the device OP is looking for.

author: ShatteredGlass
author_rank: Newbie
timestamp: January 14, 2023, 08:06:32 am
content: I guess it was a "5" after all. I mean, it looked like a "5" to me, but I just kept coming up short when searching for "5.1B". S1B on the other hand, led me to the 1N4002. Thanks for the correction and for your help.