hybridfree/eevblog-posts huggingface dataset:
Can anyone tell me what is so special about this resistor? - Page 1
Forum section: electronics / repair

author: daisizhou
author_rank: Super Contributor
timestamp: February 01, 2022, 01:27:12 pm
content: What I know so far is that this resistor is installed in the high frequency circuit network,The current flows through this resistor to generate a voltage, which is supplied to the 50 ohm RF as a sampling voltage and supplied to the AD834.I only see the NWW10 imprint.Welcome friends who know to tell me, thank you

author: Jeff eelcr
author_rank: Frequent Contributor
timestamp: February 01, 2022, 01:43:22 pm
content: Wire wound 10 watt 2 ohm at 1% is that not special enough?Jeff

author: chekhov
author_rank: Regular Contributor
timestamp: February 01, 2022, 01:44:51 pm
content: It seems it also says 'non-inductive' herehttps://datasheetspdf.com/pdf/1345610/Stackpole/NWW10/1

author: daisizhou
author_rank: Super Contributor
timestamp: February 01, 2022, 01:53:12 pm
content: Can I use DALE NH-10 instead of using it?

author: abdulbadii
author_rank: Frequent Contributor
timestamp: February 01, 2022, 02:02:05 pm
content: the circuit demand its precise value as it is produced and intended to be an excellent accurate low resistance values and high power rating propertiesmake sure replacement has that rating requirement

author: Audiorepair
author_rank: Frequent Contributor
timestamp: February 01, 2022, 02:20:15 pm
content: The Dale 10 Watt resistor is only rated at 10 Watts at 25oC.It needs to be on a heatsink, the actual wattage it can handle is directly rated to temperature.At 100oC it is rated 7.5 Watts.

author: TheMG
author_rank: Frequent Contributor
timestamp: February 01, 2022, 02:32:38 pm
content: What is this in? What is the resistor's purpose?

author: Bud
author_rank: Super Contributor
timestamp: February 01, 2022, 02:39:14 pm
content: If the resistor is in RF path, you need a non-inductive type of resistor. What frequency range your circuit is?

author: David Hess
author_rank: Super Contributor
timestamp: February 01, 2022, 03:12:07 pm
content: NWW is non-inductive wirewound:https://cdn.datasheetspdf.com/pdf-down/N/W/W/NWW12-Stackpole.pdfThe DALE NH-10 is also non-inductive wirewound so it might work, but with the conductive aluminum enclosure I doubt it.
Can I avoid memory loss this way? - Page 1
Forum section: electronics / repair

author: Juicy
author_rank: Newbie
timestamp: February 28, 2025, 09:56:56 am
content: Hey!I have an AOR shortwave radio. I need to replace a memory backup battery that seems to start leaking. It is a 1,2 volt 1/3 NiCd and I have found an exact replacement. I know that memory will be lost in seconds without battery. Can I add a voltage of 1,2 volt from my bench supply across the battery rails on the PCB, desolder the old one and resolder this new battery? I should of course need to charge the new battery to exact 1,2 V first. Doable?Christer, Sweden

author: CaptDon
author_rank: Super Contributor
timestamp: February 28, 2025, 02:05:32 pm
content: If you can find a good place to attach the external 1.2v then yes you could do it that way. You may want to tack on some little pieces of wire maybe 1/2 inch long to be a handy place to attach your external power source used when replacing your battery. On some of the stuff I worked on that had 3 volt lithium batteries with axial leads I left the unit powered on, nipped off the leads right at the old battery which left some lead length above the chassis and soldered the new battery in place working only on the top side of the PCB. Years of soldering skill makes that type of repair easy to do.

author: Ian.M
author_rank: Super Contributor
timestamp: February 28, 2025, 02:24:30 pm
content: Put a 100 ohm resistor in series with your bench PSU to limit the current if there is a voltage mismatch, and make sure the PSU output isn't grounded, and that there is no ground connected to the radio, as many soldering irons have grounded bits and shorting the battery via the iron bit would wipe the memory.

author: BradC
author_rank: Super Contributor
timestamp: February 28, 2025, 03:09:48 pm
content: The first one I ever did was a HP 3457a and I wasn't thinking. Had it powered off with external 3v support and used my soldering station with an earthed tip.That was an expensive re-cal, so since then I just do it live with a gas iron.

author: fzabkar
author_rank: Super Contributor
timestamp: February 28, 2025, 03:24:21 pm
content: Could you solder a supercapacitor in parallel with the battery?

author: Juicy
author_rank: Newbie
timestamp: March 01, 2025, 09:09:54 pm
content: I attached the leads from the bench PSU to two extra leads I soldered near the battery cell. Set the voltage to exactly same as battery, 1,15 volt and current limited PSU to 20 mA. Desoldered old battery and put the new in. Worked like a charm.
Can I fix the hotbar ribbon on my clie's LCD? - Page 1
Forum section: electronics / repair

author: Legop3
author_rank: Newbie
timestamp: July 26, 2020, 09:21:44 pm
content: I have had this old Sony clie sitting in my collection for a while, powered it on once, saw it didn't work and never touched it again. Now I'm bored and have already messed with everything i can mess with. Is there a way to repair the (hotbar I think) ribbon connection on the LCD screen? It's really tiny but I am up for anything, and there's nothing to lose since the screen is useless either way, I would just like to get it working. Google photos album is linked below:https://photos.app.goo.gl/ACFyybfRMd4cVjuY9

author: Rasz
author_rank: Super Contributor
timestamp: July 26, 2020, 09:43:07 pm
content: try poking it with a stickI mean literally take a toothpick and press on the ribbon very delicately while moving along its length while watching if anything changes on the screen

author: Legop3
author_rank: Newbie
timestamp: July 26, 2020, 09:52:44 pm
content: I tried that, there are some points where some of the vertical lines will fill in, and if I press with my finger across a certain area, the lines on the screen go away. Would it be at least semi permanent to just put something in the frame of the screen to press the ribbon down?

author: Rasz
author_rank: Super Contributor
timestamp: July 26, 2020, 10:11:57 pm
content: depends what you are pressing, ribbon or the COF chip (chip on flex), or is that COG (chip on glass)?if ribbon you can try soldering it back, Dave did a video on this, so did FFcossagI wouldnt try soldering the chip, but paper shims could work as a half assed solution
Can I flash a PIC16LF1847 with my TL866 II PLUS ? - Page 1
Forum section: electronics / repair

author: Greybeard
author_rank: Frequent Contributor
timestamp: July 23, 2024, 03:36:12 pm
content: Can I flash aPIC16LF1847with myTL866 II PLUS?I want to repair the battery pack of my Dyson V6 and need to reflash the firmware.I checked the list on xgecu.com but it doesn't include the PIC16LF1847:http://www.xgecu.com/MiniPro/TL866II_List.txt

author: coromonadalix
author_rank: Super Contributor
timestamp: July 23, 2024, 05:06:15 pm
content: not listed = not supported at the momentask the maker to include it in a next update ...
Can I replace power module with SMPS??? - Page 1
Forum section: electronics / repair

author: Dhanushka
author_rank: Regular Contributor
timestamp: October 07, 2019, 07:11:42 pm
content: Dear all,This is a non-isolated power module(BP5055-12) of a samsung washing machine(Model:WA60H4100HY) circuit board.This module gives 12V DC output at 327V DC input. This is not available in my country. So can i replace this with a SMPS of 12V.Thank You.

author: jogri
author_rank: Frequent Contributor
timestamp: October 07, 2019, 08:43:10 pm
content: That power module is just the core of a switch mode power supply, so you should be able to replace it with another one. But those circuits are common enough that i would suggest you look for a similar part as a replacement before you try to replace the existing circuit.
Can I replace this custom made 2-phase filter inductor with plain thoroids ? - Page 1
Forum section: electronics / repair

author: erikbrenn
author_rank: Regular Contributor
timestamp: September 02, 2024, 07:31:44 pm
content: Hi,I'm repairing a ventilation system that has a damaged custom made 2-phase mains filter. I contacted the manufacturer and they told me it is a custom job for the ventilation manufacturer, they did not stock it. And the ventilation manufacturer charges an arm and a leg for it.Each inductor in the original filter is 128uH.Would it be ok to replace such a filter with two thoroid chokes each of 128uH inductance? What is the reason they use such a combined filter with the two phases around a iron core instead of just using two chokes? How does combing two such inductors in one unit change the magnetics/inductance?Original filterConsidering replacing it with two of these inside a 3d-printed housing.

author: langwadt
author_rank: Super Contributor
timestamp: September 02, 2024, 07:39:51 pm
content: https://en.wikipedia.org/wiki/Choke_(electronics)#Common-mode_choke

author: fzabkar
author_rank: Super Contributor
timestamp: September 02, 2024, 08:02:47 pm
content: 128uH seems very low. I would expect that should be millihenries.Perhaps you could use a 1:1 isolation transformer (with correct phasing)?https://www.ebay.com.au/itm/353075366503

author: jdragoset
author_rank: Frequent Contributor
timestamp: September 03, 2024, 12:17:23 am
content: Since it is EI iron core, Drill rivets, Remove core, Cut Mylar tape, Unwind, Counting turns and direction, Rewind with same size enameled wire and Mylar tape.

author: jonpaul
author_rank: Super Contributor
timestamp: September 03, 2024, 09:07:19 am
content: easy to remove clamp, varnish, check gap and wdgs for short/open.Get same wire, rewind, reassembeleJon

author: wasedadoc
author_rank: Super Contributor
timestamp: September 03, 2024, 10:04:55 am
content: Quote from: erikbrenn on September 02, 2024, 07:31:44 pmYou need to learn about common mode chokes. You cannot emulate one with two uncoupled windings.https://www.coilcraft.com/en-us/edu/series/a-guide-to-understanding-common-mode-chokes/And it is not "2 phase".

author: erikbrenn
author_rank: Regular Contributor
timestamp: September 09, 2024, 09:39:56 pm
content: Somewhat late response here, but thanks for the replies. I dunno what I was thinking, I simply didn't think this was a common mode choke as I have never seen one like this.The component is faulty, which probably explains its low inductance for its size... It has burnmarks and is likely shortedI bit the bullet av ordered a new one for two hundred bucks> And it is not "2 phase".yes, I realize that now
Can I replace this SMD electrolytic cap with a thru hole cap ? - Page 1
Forum section: electronics / repair

author: guix
author_rank: Newbie
timestamp: October 15, 2024, 10:50:07 pm
content: Hello,I have this broken smd cap for a stepper motor driver on a 3d printer motherboard, unfortunately one leg is broken, and I don't have a similar capacitor at hand.But I have thru hole capacitor of the same value (also marked "low esr, -40+105°C"), so can I use it instead or is it not recommended ?

author: TimFox
author_rank: Super Contributor
timestamp: October 15, 2024, 10:54:52 pm
content: It should work: how would you secure it mechanically?

author: David Hess
author_rank: Super Contributor
timestamp: October 15, 2024, 10:59:14 pm
content: It will work fine if you can figure out how to attach it. I have done it by cutting the leads to leave just enough clearance to get a soldering iron tip to the pad, which is not the best mechanically, but good enough in most repair applications.

author: guix
author_rank: Newbie
timestamp: October 15, 2024, 11:00:17 pm
content: The pads on the board are also brokenI plan to place the capacitor laying on its side (like it is on the picture), solder the + to the diode just below and the - to the nearest ground (or I remove the silkscreen near the "creality" logo), making the legs as short as possible, then hot glue so it can't moveThanks

author: erikbrenn
author_rank: Regular Contributor
timestamp: October 15, 2024, 11:07:33 pm
content: Yes you can, but besides the capacitance beware its temperature and voltage rating. Also, some caps are low ESR for a reason.I usually just use high temperature silicon to keep them in place.For the broken pads you just need to scrape off some solder mask to find new copper.

author: coromonadalix
author_rank: Super Contributor
timestamp: October 15, 2024, 11:21:14 pm
content: you have some pads left, search where they go and solder a cap on the part destination, nearby diode etc ....

author: guix
author_rank: Newbie
timestamp: October 16, 2024, 12:02:12 am
content: That should do it

author: The Soulman
author_rank: Super Contributor
timestamp: October 16, 2024, 12:09:09 am
content: Bodge's your uncle.

author: inse
author_rank: Super Contributor
timestamp: October 16, 2024, 05:31:13 am
content: This is how you do it.Replacing the copper pads only for the looks of it - waste of time
Can optocoupler isolators be used interchangeably? - Page 1
Forum section: electronics / repair

author: daisizhou
author_rank: Super Contributor
timestamp: September 08, 2022, 10:52:58 pm
content: Initially installed model is SFH617A-2,The sales market cannot operate normally due to the impact of COVID-19.I can't get a new SFH617A-2.Search my spare parts library to find commonly used PC123, PS2561, PC817, PC3SH21SFH617A-2 is used for switching power supply feedback protection.Which one should I choose is the best, hope someone can help me, thankshttps://pdf1.alldatasheetcn.com/datasheet-pdf/view/106839/ETC/SFH617A-2.htmlhttps://pdf1.alldatasheetcn.com/datasheet-pdf/view/43321/SHARP/PC123.htmlhttps://pdf1.alldatasheetcn.com/datasheet-pdf/view/6469/NEC/PS2561.htmlhttps://pdf1.alldatasheetcn.com/datasheet-pdf/view/43368/SHARP/PC817.htmlhttps://pdf1.alldatasheetcn.com/datasheet-pdf/view/412717/SHARP/PC3SH21YFZ.html

author: abdulbadii
author_rank: Frequent Contributor
timestamp: September 09, 2022, 06:20:30 am
content: I don't think you need ask / post it, as one can see it is 99% equally perform at the same rating
Can someone help to me at calculate a transformed choper? - Page 1
Forum section: electronics / repair

author: Nest
author_rank: Newbie
timestamp: August 21, 2019, 10:46:08 am
content: Hi all, I'm new in this site, i'm spanish and I'm sorry my poor english.I write this words at here by I don't know where at all site to do it .I have a ultrasonic cleaning machine and a the last weekend my machine are broked.I opened my device and I can see a ciruit of power broked, but I don't see a circuit of control what drive the transducers at 40KHz.My idea is make a circuit of power with a microcontrolator to drive the transducers at 40KHz but I for make that I need make a transformer of the frecuency.I have thought on make a transformer of frecuency of 40KHz at 230v/120V at 130w.My machine have two transducer at 60w 40KHz.I need help to make a tranformer chopper in push pull configured.If someone want and can to explain to me how to calculate that transformer or if someone have a beter than idea....Thanks at all

author: PKTKS
author_rank: Super Contributor
timestamp: August 21, 2019, 01:11:37 pm
content: wiring transformers is anything but simple taskit is FAR WAY EASIER AND CHEAPER to find equivalentin particular if your machine is Chinese.Those trafos are very common in their apparatusand just a dozen manufacturers really supply demandTake note the codes and colors (yellow and green are two differentfabs) and codes can be found in their internet salesPaul
Can someone tell me how to find this analog 3d sensor joystick ? - Page 1
Forum section: electronics / repair

author: maeloterkim
author_rank: Newbie
timestamp: May 15, 2022, 01:52:50 pm
content: Hi allCan someone tell me how to find this analog 3d sensor joystick ?is a joystick from a vintage pong console Hanimex , Soundic , etcI tried to find in aliexpress and google for hours but i find only for ps2 ps3 ps4 etcThe only text in the joystick is:50K ohms B100K ohms BMk83KI need only the part with the potenciometersBut I have not found anything like thisThanks

author: maeloterkim
author_rank: Newbie
timestamp: May 16, 2022, 07:45:37 am
content: I have found a solution, in case it serves someoneThe full joystick, we will not find it unless we buy another complete console but that is not the ideal solution, since we always had a console that would not workThe solution is to replace the part of the potentiometer that is wrong.That is, the bad part of the potentiometer and this part if we can "easily" find it in Aliexpress or elsewhereIn this answer I have put photos of the part to replaceThere is a photo of the old part and another image of a newThe joystick has two different potentiometers one of 50k and another of 100kWhat we must do is1) Buy two different potentiometers of 50k and 100k where the part that we are going to disassemble, from the new potentiometers is as the part we will replace. More or less the same size with 3 pins2) Disassemble the new parts and disassemble the old parts3) Put the new parts in the Joystick and assemble it again. Keep in mind which potentiometer is 50k and which of 100k4) Put the cables again and tryThis solution will surely also serve, other ancient joystcks from other consoles that we cannot find.
Can someone tell me the output voltage and amperage? Transformer  - Page 1
Forum section: electronics / repair

author: Solartracker2
author_rank: Contributor
timestamp: December 22, 2022, 11:27:21 am
content: My Tesla walk connector charger has a defect transformator

author: coromonadalix
author_rank: Super Contributor
timestamp: December 22, 2022, 11:50:12 am
content: series :https://www.rgbautomatyka.pl/en/MP-130I HP 1KV TRANSFORMER DELTAThe : av-tp15010 should be the model, but can be a custom made
CAN strange shape on scope - Page 1
Forum section: electronics / repair

author: Chriss
author_rank: Frequent Contributor
timestamp: April 26, 2022, 10:55:55 pm
content: Hi!I'm trying to connect a car ecu on my bench to my diagnostic tool but no way to do that.I have experience in that cos I use ecu's many times on my bench.When I checked the Can-H and Can-L with my scope I got a strange signal. Look the at the picture.I'm not sure what should I look for.Any idea where to start to troubleshoot?Thanks for any advice.

author: jwet
author_rank: Frequent Contributor
timestamp: April 27, 2022, 04:58:31 pm
content: Its a differential signal. Use your scope math function if it has it to subtract the two, it will make more sense. Otherwise go through a CAN physical interface chip to get get a single ended signal. It does look funny though. Pay some attention to grounding and don't have other equipment connected. (see Dave's video on how to blow up your scope)

author: Chriss
author_rank: Frequent Contributor
timestamp: April 27, 2022, 06:27:27 pm
content: Thanks for your time spent to replay.The CAN-H and CAN-L signal is in a kind of infinity loop. Like if you would pulse two signals with an NE555.I never saw that kind of "looping" CAN signal.

author: jwet
author_rank: Frequent Contributor
timestamp: April 28, 2022, 08:25:04 pm
content: Me neither- Learned something.

author: Chriss
author_rank: Frequent Contributor
timestamp: April 28, 2022, 08:34:21 pm
content: Problem solved a couple of minutes ago.The CAN line is not terminated in the ecu.When I put a 120R across the CAN lines thesignal shape is now perfect.
Can the Osmo Pocket's battery be replaced? - Page 1
Forum section: electronics / repair

author: meanie2
author_rank: Contributor
timestamp: April 11, 2022, 04:56:53 am
content: Hi! There is rumour going around that owners cannot replace the Osmo Pocket's battery themselves.Is this true?It seems this guy was able to do it:While this guy didn't. The rumour seems to have originated from here.Someone commented that he had destroyed the connector while removing the glue.There are others asking about it in other videos:What do you experts think?
Can this LCD screen be replaced? - Page 1
Forum section: electronics / repair

author: GGUE
author_rank: Newbie
timestamp: March 08, 2024, 06:17:01 pm
content: Hello,I’m a newbie both on the forums, and also to the fun world of electronics. I’ve always liked to watch tutorials online and follow simple projects along finding them to be rewarding. Nothing like building a working device yourself. Even if it’s a kit. I basically taught myself how to solder, but I honestly know little to understanding the surface and complexity of electronics fully.A bit more about me that has me interested in this was when I started to make my own Paranormal gadgets after a friend got me into it. Which brings me to my question. My friend purchased something called a SpiritBox which is Essentially a radio which scans/sweeps through channels with preset sweet rates. Apparently while it was in his bag the LCD screen sustained some damage and bled. I’ve taken it apart and found what I believe to be a similar replacement part. My question.. and idk if this is even able to be answered, but can I replace this screen with a part off Amazon. I’ll include some photos but it’s basically a lcd screen with 16pins on the top. Idk if these need to be programmed to work with the board or what. I’ll include some photos and a link to what seems to me like the component that could work.Sorry if this isn’t the right area to post and if this is an annoying question to some. Just looking for any advicehttps://a.co/d/eJQGyg7

author: inse
author_rank: Super Contributor
timestamp: March 08, 2024, 06:39:13 pm
content: Nope, its a custom LCD,unfortunately it cannot be replaced by a standard display.

author: coromonadalix
author_rank: Super Contributor
timestamp: March 08, 2024, 10:10:00 pm
content: same here it will have radio related characters / words etc ... custom made

author: Jwillis
author_rank: Super Contributor
timestamp: March 09, 2024, 01:10:40 am
content: Never say "you can't" until you've exhausted all possibilities. Since it's busted anyway, Desolder the screen and see if theirs any numbers on the back.

author: inse
author_rank: Super Contributor
timestamp: March 09, 2024, 05:44:05 am
content: No one said it cannot be repaired with the original part…

author: jpanhalt
author_rank: Super Contributor
timestamp: March 09, 2024, 05:55:01 am
content: If this is what it looks like, that's a special screen. Have you checked whether these are ever repaired?Maybe find a "parts only" on ebay with a working screen?

author: inse
author_rank: Super Contributor
timestamp: March 09, 2024, 06:18:48 am
content: I still wonder whether ghosts prefer AM or FM, or might have switched to digital encoding in the meantime…

author: Haenk
author_rank: Super Contributor
timestamp: March 09, 2024, 05:17:33 pm
content: Maybe just ask them if they are willing to sell you a new display?https://www.pro-measure.com/Contact_Us_a/83.htm
can weak/dead backup batteries cause circuit problems? - Page 1
Forum section: electronics / repair

author: coppercone2
author_rank: Super Contributor
timestamp: March 03, 2021, 11:43:59 pm
content: If you are repairing a device, a portable analyzer for instance, which has multiple backup batteries which are dead, and the device is showing a memory error,do you think that the backup batteries could have an effect on the circuit if its hard powered from mains causing a periodic reset?Are these batteries typically installed to allow for normal operation if dead or are there designs that can bug out if they are not there? (3V lithiums, like motherboard backups).I usually replaced them if I planned to work on gear but I never really tried to operate without one. They are a little pricey and hard to get so i'd like to know if it is at least a plausible problemfor 80's 90's designs.so do you ever replace batteries before you find the other problems in such old equipment because you feel that it is causing or masking a problem making it necessary to replace?.

author: SilverSolder
author_rank: Super Contributor
timestamp: March 03, 2021, 11:55:32 pm
content: I have a Wavetek signal generator here, from that period, which would periodically reset... I wasted hours probing it to figure out what the problem was. In the end, it turns out that a low back-up battery was the problem... due to a not-so-cleverly designed circuit around it. - so the answer is, Yes, it can be a problem, sometimes not intentional (i.e. the designer assumed the battery was there and working, and didn't bother designing for the case where it is missing!).

author: coppercone2
author_rank: Super Contributor
timestamp: March 03, 2021, 11:59:26 pm
content: yea i got a wavetek 271 also that is temperamental that I need to deal with but this is a weird portable DSA. yea I should tend to that it reminds me of wavetek in how its built (sci atlanta labs or something)im really juicing that thing for a few dollars, that wavetek just became a priority fix. I wonder if the other wavetek big rackmount has em too.. .

author: coppercone2
author_rank: Super Contributor
timestamp: March 04, 2021, 12:11:54 am
content: any idea how to replace a renatas 250-00 power module?I know nothing about these in circuit backups or designing them honestly. Is it just a coin cell with a different reliability? or does it have some kinda good ESR or other behavior making premium necessary?does anyone have a old app note that tells you how to design these circuits so I know what these people are thinking when they do this?
Can you help identify this RF part - Page 1
Forum section: electronics / repair

author: jhormilla
author_rank: Contributor
timestamp: July 16, 2022, 06:32:57 pm
content: I have a 1 Watt RF 450 MHz power amplifier and would like to identify the power device (probably a power N-FET) the only marking is "KB" on the final stage of the amplifier. It would be great to get a datasheet for it.TIA

author: fzabkar
author_rank: Super Contributor
timestamp: July 16, 2022, 07:08:05 pm
content: This has the same package and marking code, but doesn't fit the application:BSS192, Nexperia, P-channel vertical D-MOS transistor, 240V, 200mA, marking KB, SOT89:https://assets.nexperia.com/documents/data-sheet/BSS192.pdfEdit:This page suggests that "KB" is RD01MUS2B:https://it.aliexpress.com/item/32330083233.htmlRD01MUS2B, Mitsubishi, MOSFET Power Transistor for VHF/UHF RF driver device, 527MHz, 1W, 7.2V, marking KB, SOT89:https://www.mitsubishielectric.com/semiconductors/content/product/highfrequency/siliconrf/discrete/rd01mus2b.pdf

author: jhormilla
author_rank: Contributor
timestamp: July 16, 2022, 07:45:27 pm
content: Thank you, that looks like it.
Can you help me identify the piece? - Page 1
Forum section: electronics / repair

author: brkklcl
author_rank: Newbie
timestamp: September 16, 2024, 07:03:27 am
content: Hello everyone, I need help. I have done a lot of research on the internet but I could not reach a conclusion. Can you please tell me what the sot23 part in the picture is? I bought it and installed it in W1 (BZX84C2V4) but p303-19 burned and I cannot find the part. 2ch35 please help. The motherboard belongs to asusVG278Q or Acer XB272. Control Card: 27M14-C05
Searching for a schematic - Page 1
Forum section: electronics / repair

author: CLAPPALLAN
author_rank: Newbie
timestamp: November 02, 2023, 10:02:22 pm
content: Hi Guys, new member here.I have searched and searched and cannot find a schematic. I'm working on a Samson S62 mixer amp. These amps are found all over the world in huge numbers. Surely, there is a schematic somewhere out there.I'd really appreciate any help,Thanks,Allan

author: Swake
author_rank: Frequent Contributor
timestamp: November 02, 2023, 10:51:28 pm
content: Not convinced the quantities out there are that large for this thing. Seems there isn't even a video on youtube about it nor a teardown anywhere. Samson itself doesn't have the manual in its website.Explain the issue, post some pics of the boards, we might be able to help.important: change the title of this post to something relevant.

author: CLAPPALLAN
author_rank: Newbie
timestamp: November 02, 2023, 11:19:03 pm
content: Thanks,I changed the title if the post as you requested. I don't have an issue as I've been repairing just by going blindiy without the roadmap. I I just would like to have a schematic of the silly things......Oh, and I will say that they are getting long in the tooth; manufactured back in the nineties and they very seldom fail.Allan
Can you ID these parts. - Page 1
Forum section: electronics / repair

author: sampler1
author_rank: Regular Contributor
timestamp: January 26, 2023, 07:40:52 pm
content: Hi ,I am having a hard time to ID some parts in an Audio Interface. (Lexicon I/O 42 )The power adapter is 9V AC 2 Amp. There is a strange fuse - F1 part # 260E & PGSZ . Also 4 Diodes Part # 1R1F or V1F & P710L.I have included 3 photos that show the parts. Can anyone clue me in as to some part numbers I can actually find to make an order.And the contest begins.. LOLThanks!

author: fzabkar
author_rank: Super Contributor
timestamp: January 26, 2023, 08:06:55 pm
content: https://www.onepcba.com/ds/VS-10BQ040PBF.pdfhttp://www.smdmark.com/en-US/search/code?id=v1fhttps://media.digikey.com/pdf/PCNs/Vishay/DD-002-2015-Rev-0.pdf(contains photo of V3F marking)https://www.aliexpress.com/item/33015928202.html(IR1F = 10MQ040N, IR = International Rectifier?)https://www.tautec-electronics.de/Datenblaetter/Dioden/VS-10MQ040N.pdf

author: sampler1
author_rank: Regular Contributor
timestamp: January 26, 2023, 08:29:58 pm
content: Ahh Thanks Fzabkr !I think the fuse may be MF-SM250..Thanks !
Can you identify this connector? - Page 1
Forum section: electronics / repair

author: Hogwild
author_rank: Regular Contributor
timestamp: July 18, 2021, 11:28:40 pm
content: Hi:So I decided to replace the cooling fan in my LTO-2 tape drive.On opening it, I noticed this connector attached to the PSUwhich then mates with another connector attached to thecooling fan. Can anyone tell me the name of this connectorso I can buy its mate?

author: bob91343
author_rank: Super Contributor
timestamp: July 18, 2021, 11:36:31 pm
content: Maybe a Molex?

author: ataradov
author_rank: Super Contributor
timestamp: July 19, 2021, 12:38:52 am
content: This looks like Molex Microfit. There a few variants with different sizes, but it should be easy to find by that name.I think this is your connector:https://www.mouser.com/new/molex/molex-micro-fit-tpa-connectors/

author: Hogwild
author_rank: Regular Contributor
timestamp: July 19, 2021, 12:54:42 am
content: Thank you very much. That's so helpful.Finally, I'll be able to do tape backups withoutthe deafening noise.

author: Hogwild
author_rank: Regular Contributor
timestamp: July 19, 2021, 01:51:33 am
content: How do you fasten that connector to the wires?Is it crimped on? Soldered on ?

author: coromonadalix
author_rank: Super Contributor
timestamp: July 19, 2021, 02:12:04 am
content: Seems to be the same found on atx psu'sCrimped pins

author: PeteH
author_rank: Unknown
timestamp: July 19, 2021, 02:15:55 am
content: That could be a mini fit JR miles series. Check the pin pitch (3mm vs 4.2mm).Crimp tools are expensive, you could just buy the board mount option and solder wires onto the pins (or solder wires onto the crimps)... Depends on the gender.

author: Hogwild
author_rank: Regular Contributor
timestamp: July 19, 2021, 03:15:14 am
content: Ah, thank you. Looks like it's time to call Digikey.

author: ataradov
author_rank: Super Contributor
timestamp: July 19, 2021, 03:23:15 am
content: You can solder it too in a pinch. It is not designed for it, but it works if you only need a few.

author: Hogwild
author_rank: Regular Contributor
timestamp: July 19, 2021, 03:25:31 am
content: How do I check the pin pitch? I don't even know that pin pitch is.I have limited tools as I don't repair electronics.

author: ataradov
author_rank: Super Contributor
timestamp: July 19, 2021, 03:29:54 am
content: Measure approximate distance between the pins. And overall connector size.
Can you identify this connector - Page 1
Forum section: electronics / repair

author: Vaman
author_rank: Newbie
timestamp: January 21, 2023, 01:21:46 pm
content: I purchased a Mini Circuits ZX76-31A-PPS+ off Ebay and I am trying to source the 10 way control connector. Mouser etc want £35.00 for a 1.5mtr cable, which is more than paid for the attenuator. I have seen the connector sometime ago but do not know what it is called in order to trace it.

author: madires
author_rank: Super Contributor
timestamp: January 21, 2023, 03:16:40 pm
content: The datasheet clearly notes that the connector is an SMA. Don't confuse it with RP-SMA, which is the standard connector for WiFi antennas.

author: Vaman
author_rank: Newbie
timestamp: January 21, 2023, 03:27:35 pm
content: Apologies I did not make myself clear. Yes the unit is SMA, it is the 10 way connector for the control lines that I am trying to identify as per the attachment.

author: tooki
author_rank: Super Contributor
timestamp: January 25, 2023, 08:22:55 pm
content: £35 is probably less than the value of the amount of time needed to track down the connector, never mind assemble it…

author: coromonadalix
author_rank: Super Contributor
timestamp: January 26, 2023, 12:40:20 am
content: Is it me or this look like an E-Sata connector

author: Momchilo
author_rank: Regular Contributor
timestamp: January 26, 2023, 02:31:29 am
content: You can buy the cable from Ebay a little bit cheaper:https://www.ebay.de/itm/141848090347But looks like some sort of a Sata connector.

author: DavidKo
author_rank: Frequent Contributor
timestamp: January 26, 2023, 06:10:48 am
content: E-Sata have different locking mechanism. This one seems to have also different height/width ratio.

author: Vaman
author_rank: Newbie
timestamp: January 26, 2023, 07:38:00 am
content: Thanks all for your input folks.The connector is now identified as an HRS connector that Mouser etc sell for around £2.50. It was identified by the owner of a Mini Circuits ZX76-31A-PPS+ .So my next order will include on of those.
Can you recognize this chip? - Page 1
Forum section: electronics / repair

author: Aller
author_rank: Contributor
timestamp: May 14, 2022, 02:53:17 am
content: Hi Everybody.I have a self-darkening visor/shield from a 3m Speedglas 9100XX Adflo Welding Helmet with 1 component reporting short on the circuit board. I can't find any data on this component - see the picture.Can anybody kick me in the right direction? PLEASE!

author: fzabkar
author_rank: Super Contributor
timestamp: May 14, 2022, 10:42:24 pm
content: I've been reading a patent which makes reference to a 3-axis motion sensor:https://patentimages.storage.googleapis.com/26/11/a9/c9db666a4ce284/US20060285330A1.pdfA subsequent search for a MEMS motion sensor turned up this STMicroelectronics part:https://www.mouser.com/datasheet/2/389/iis2dlpc-1483239.pdfThe package style is LGA-12.TDK (InvenSense) is another manufacturer of these devices.This looks promising:https://www.integrated-circuit.com/products-detail/LIS2DH12TR/EIS-3450209.htmlhttps://www.integrated-circuit.com/pdf/489/983/8.pdf(LIS2DH12TR datasheet)Here are a few others:https://ipv4.google.com/search?q=%22lga-12%22+filetype%3Apdf+%22absolute+maximum%22+MEMS+digital+output+motion+sensor+site%3Ast.comAmong the applications listed in some datasheets is "motion detector for wearables". Some sensors also incorporate an additional temperature sensor.Here is ST's 2017 web site:https://web.archive.org/web/20170815205528/http://www.st.com/content/st_com/en/products/mems-and-sensors/accelerometers.html?querycriteria=productId=SC444I'm assuming that "731" is a Year/Week date code, ie week 31 of 2017. The part number is probably in the QR code.There are a handful of possible candidates on ST's 2107 web site. Some are 1.0mm thick, others are 0.86mm. One has a nominal Vcc of 1.8V, the others are 2.5V. If you measure the voltage at the Vcc pad, and break out a micrometer, you should be able to reduce the number of possibles to 2 or 3.Finally I would place the chip on a flatbed scanner, scan it at max resolution, and then decipher its QR code.WARNING: Please revisit your speedometer thread. I think I may have misidentified your Zener.
Canberra 3002 High Voltage Power Supply - Page 1
Forum section: electronics / repair

author: SSkalko
author_rank: Newbie
timestamp: April 10, 2025, 06:42:15 pm
content: Greeting, I recently acquired a Canberra 3002 High Voltage Power Supply. The power supply does not generate an output voltage and I will need to repair it. I was hoping someone here has taken on a repair of this device in the past and might have a circuit diagram or repair manual to help me in this. Any help or prior experience repairing with this equipment would be greatly appreciated. Hopefully the broken component is not in the potted high voltage section.

author: TimFox
author_rank: Super Contributor
timestamp: April 10, 2025, 07:18:22 pm
content: Do you have a “NIM Bin” to power the unit?

author: joel16
author_rank: Contributor
timestamp: April 10, 2025, 07:46:07 pm
content: Manual with schematic-http://www.nuclearphysicslab.com/npl/wp-content/uploads/Canberra_3002_HV_Power_Supply-1.pdfSource page which may have other useful info-http://www.nuclearphysicslab.com/npl/npl-home/spectroscopy/software_and_hardware/nim-modules/canberra-nim-devices/

author: SSkalko
author_rank: Newbie
timestamp: April 11, 2025, 12:27:46 am
content: I have the 115 VAC module.Thank you for the link, that will help enormously
Cannot find datasheet for Sharp LCD Panel LQ10DS05  - Page 1
Forum section: electronics / repair

author: rfdes
author_rank: Regular Contributor
timestamp: October 09, 2025, 08:35:54 pm
content: I've purchased a dirt cheap (new in box) TFT Sharp display model LQ10DS05 (10.4, 800x600) that I hope to install into a logic analyzer where the original display (NEC) has died. I have the interface pin out for an LQ10DS01, which I believe is the same pin out for the '05. However, I haven't had any luck with interfacing the '05 display to the instrument. The LQ10 series is supposedly 800x600 and is a late '90s model using parallel RGB.I am in search of a datasheet for any of the LQ10 series models and I have been unsuccessful finding a detailed datasheet showing timing, etc. The normal online outlets have not helped. There appears to be something odd that I am overlooking with interfacing this model.So, I am reaching out to find out if anyone has a datasheet for any of the following models:LQ10DS01LQ10DS05LQ10DS11LQ10DS21Thanks for any help you might be able to provide.Jim

author: fzabkar
author_rank: Super Contributor
timestamp: October 09, 2025, 09:10:36 pm
content: Is this pinout anything like yours?https://datasheet.octopart.com/LQ150X1LG11-Sharp-Microelectronics-datasheet-15976534.pdfhttps://www.phys.szote.u-szeged.hu/bbalazs/bb/lcd/lq10ds01.pdf(Sharp LQ10DS01 pinout)

author: rfdes
author_rank: Regular Contributor
timestamp: October 09, 2025, 09:15:56 pm
content: No, my interface has a 41 pin connector. I've attached the pin out of what I believe to be identical to the LQ10DS05. The datasheet is for the LQ10DS01. I'm not 100% confident that the pin out is the same but it likely is.What I need is electrical timing, power levels, etc. These datasheets are allusive.Thanks for responding.Jim

author: rfdes
author_rank: Regular Contributor
timestamp: October 09, 2025, 09:17:21 pm
content: We seemed to stepped on each other's toes. What you posted is the same pin out sheet that I found. However, there is no other electrical information.Thanks

author: fzabkar
author_rank: Super Contributor
timestamp: October 09, 2025, 09:22:51 pm
content: I found this document:https://advdownload.advantech.com/productfile/Downloadfile5/1+GC+4113/PCA-6752%20Manual.pdfOn page 116 there is a long list of TFT panels. Perhaps the "18BTFT" panels all conform to the same pinout and timing spec, in which case you could expand your search.
Cannot find smd number - Page 1
Forum section: electronics / repair

author: keifcoofghook
author_rank: Newbie
timestamp: January 07, 2025, 12:59:18 pm
content: i have this smd that i need to replace: c8csa | sot-23can anyone help?

author: Swake
author_rank: Frequent Contributor
timestamp: January 08, 2025, 01:37:47 pm
content: Not conclusive but nevertheless herewith what I found.Everything is SOT23MarkingC8 BCF30 - Transistor8C MMBZ5228B - 3.9V zener 0.225W8S MMBZ5242B - 12V zener 0.225WSA BSS123 - n-ch mosfet 100V 0.17Anothing found with08O88SACould not find what the C with double underline means, did not find a similar logo either.Well, it must be out there. If you find something let us know !

author: inse
author_rank: Super Contributor
timestamp: January 08, 2025, 01:49:48 pm
content: What does U indicate in your PCB? IC, Transistor, MOSFET?If you don’t know what it is, how do you know it needs replacement?Draw a schematic around this part, maybe it gets clearer…

author: keifcoofghook
author_rank: Newbie
timestamp: January 08, 2025, 02:30:01 pm
content: i know it needs to be replaced just by the look of it and based on the marking, u71 seems to be same as u70 because of the order of the other components and i also checked the bad smd under microscope and i saw the first 2 letter c8.

author: inse
author_rank: Super Contributor
timestamp: January 08, 2025, 02:36:16 pm
content: Then desolder U71 and measure what it is, would help searching

author: wraper
author_rank: Unknown
timestamp: January 08, 2025, 02:38:04 pm
content: Dunno why they're designated as Uxx but they are N-channel MOSFETs.

author: wraper
author_rank: Unknown
timestamp: January 08, 2025, 02:41:13 pm
content: SI2318DShttps://www.lcsc.com/product-detail/MOSFETs_Vishay-Intertech-SI2318DS-T1-E3_C143682.html?s_z=n_si2318

author: keifcoofghook
author_rank: Newbie
timestamp: January 08, 2025, 08:51:15 pm
content: this is c8kda and its similar but how can i find thh exact one.thanks for the help by the way

author: wraper
author_rank: Unknown
timestamp: January 08, 2025, 09:03:54 pm
content: Quote from: keifcoofghook on January 08, 2025, 08:51:15 pmYou won't ever find exactly the same code unless it's a part from the same batch. Device code is c8, the rest has nothing to do with part number.
Canon HF S10A Vixia camcorder info needed - Page 1
Forum section: electronics / repair

author: fzabkar
author_rank: Super Contributor
timestamp: October 05, 2022, 10:45:53 pm
content: Could someone please provide the pinout for the 8-pin SD card interface which connects via flex cable to the DM42248 IC (32-pin)?This camcorder (Canon HF S100A Vixia) has an internal PCB with a Phison PS8005 SD controller and NAND flash. The connector is at the bottom right corner of the larger PCB. The smaller Phison PCB is not shown.https://photo-parts.com.ua/parts/IMG_STORE/Canon%20HF%20S100A%20PCB/Vixia%20HF%20S100_pcb.jpgEdit:The model should have been S10A, not S100 or S100A. Sorry.

author: fzabkar
author_rank: Super Contributor
timestamp: October 08, 2022, 04:41:40 pm
content: I've now been told that the model is HF S10A. Does that make a difference? (I'm investigating on behalf of someone else, so I don't have access to the camera.)
Canon i865 - now no power light on the printer switch. - Page 1
Forum section: electronics / repair

author: martfoxy
author_rank: Regular Contributor
timestamp: June 25, 2023, 07:41:37 pm
content: I bought a replacement refurbished print head for my Canon i865 and after a short time the power light went off. It has damaged the printer in some way. I check the power supply in another good printer and that is working ok.I have attached photos of the board in printer. There is a fuse on the board which I checked and is ok.I don't suppose these boards are repairable.Has it got a processor could that have been killed by the print head?

author: m k
author_rank: Super Contributor
timestamp: July 03, 2023, 04:02:51 pm
content: Should the power light come on without the print head?

author: martfoxy
author_rank: Regular Contributor
timestamp: July 10, 2023, 11:37:44 am
content: Yes it should come on - but you get an error code flashed on it.

author: m k
author_rank: Super Contributor
timestamp: July 11, 2023, 06:23:53 pm
content: So if power is ok in other printer something is overloading it in the first printer.If error code is not coming up without the print head then the case really seems to be so that the processor board is the one that is overloading.It's also possible that some kind of an "all good" signal is missing.But it also seems that the head itself has its power components, so with luck the repair is easier than very difficult, very likely next head is also needed.
Canon MG3600 repair - Page 1
Forum section: electronics / repair

author: justaguy
author_rank: Contributor
timestamp: November 12, 2021, 07:56:34 am
content: I have this consumer grade printer-scanner thing. Once every 3 or 4 prints, the printer loads the paper and immediately spits it out in error; otherwise, it prints just fine.I suspect that there's paper sensor of some sort near the printing head which is failing (either the sensor itself, or the ribbon connection etc) and tells the printer that the paper was not loaded correctly.The thing is a pain in the back to open and I still haven't figured out how to reach the print head assembly.Does anybody have a service manual, or any tip.Thank you all

author: picburner
author_rank: Frequent Contributor
timestamp: November 12, 2021, 08:08:57 am
content: Not exactly your Canon printer model but maybethis articlecan help.I also found theservice manualfor you, unfortunately it is in Japanese language...

author: justaguy
author_rank: Contributor
timestamp: November 12, 2021, 11:11:23 am
content: Thanks @picburnerThe first article I knew already, and it helped me some time ago to fix another common problem of this model.There is also an iFixit article which shows how to disassemble the thing, upto a certain point.I'll look at the pictures of the japanese manualmaybe I can guess something useful.
Canon MG7120. Need EEPROM file. - Page 1
Forum section: electronics / repair

author: nedc
author_rank: Newbie
timestamp: March 30, 2021, 03:09:29 pm
content: Hello all, There is Canon MG7120 printer. I tried to reset the ink absorber counter with Service Tool software, but service mode was locked. Maybe someone has EEPROM file for this printer?
Canon SX700 HS Flash problem - Page 1
Forum section: electronics / repair

author: drkenrich
author_rank: Newbie
timestamp: November 14, 2022, 10:09:26 pm
content: I've loved this camera since I bought it several years ago. In the last year the flash stopped working.It will not allow setting the flash via the Function control wheel on the back. If I do a full reset on the camera, it sometimes will allow me to access the flash menu and select a setting. Then it will work for a few shots, then stop and require the same process again. Sometimes that reset doesn't work for several tries so I give up.It does flash so the bulb and capacitor are good. I've tested all modes and it's the same in all of them. Popping up the flash before or after starting the camera makes no difference. Only, occasionally and becoming more rare, does the Reset work.I've considered buying a new camera, but this is a classic in outstanding functions in minimal size. Nothing on the current market even comes close to 16.12 MP, 30x optical x 4x digital = 120 total zoom, 1 mm - infinity focus range, 1/3200 - 15 second speed, Full HD on video and loads of other settings, etc. I've uses the full range of zoom many times and using available light is normally very good and passable in low light conditions.I'm an amateur travel photographer for personal use only. I've used it for the last year, even without the flash, and hate to give it up for a lesser camera solely for an occasional flash. Generally, I carry it in my pocket and don't have room for a larger model that might require changes of lenses.If anyone can give me details on getting into and fixing this problem, point out a similarly above normal functional alternative, send me to a good repair facility or fix it for me, I'm willing to listen.Thanks in advance.

author: viperrepair
author_rank: Newbie
timestamp: November 26, 2022, 08:11:18 pm
content: Flash tube is failing. If you want you can monitor voltage across the tube if you can take the cover off. If it's charging its the tube.