hybridfree/eevblog-posts huggingface dataset:
Where can I find the data manual for BOSCH chip 48023 (HSSOP36) - Page 1
Forum section: electronics / repair

author: daisizhou
author_rank: Super Contributor
timestamp: December 02, 2023, 12:02:13 pm
content: Where can I find the data manual for this BOSCH chip 48023 (HSSOP36)? I haven't been able to find its detailed data manual yet

author: fzabkar
author_rank: Super Contributor
timestamp: December 02, 2023, 08:20:19 pm
content: FYI, Bosch refers to the package as "PSO36".FWIW, the CY320 chip has a similar looking pinout.https://www.bosch-semiconductors.com/media/automotive_systems_ics/pdf_1/ic_engine_management/bosch_ic_cy320.pdf
where can i find this capacitor? - Page 1
Forum section: electronics / repair

author: salviador
author_rank: Regular Contributor
timestamp: August 05, 2024, 08:51:17 am
content: where can i find this capacitor?

author: gamalot
author_rank: Super Contributor
timestamp: August 05, 2024, 09:14:30 am
content: I think it's just a stacked metallized film capacitor, 12uF/100V.

author: Gyro
author_rank: Super Contributor
timestamp: August 05, 2024, 09:20:48 am
content: Yes, stacked film. No special dielectric, probably polyester. It's the cheapest (and least environmentally protected) format, replace it with something encapsulated.
Where can i get output bindig post for Leader LDM-170 distortionmeter? - Page 1
Forum section: electronics / repair

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: September 06, 2021, 11:22:29 pm
content: Where can i get output bindig post for Leader LDM-170 distortionmeter?I scored a Leader LDM-170 distortionmeter for just $20, and the seller did bearly put it into a cardboard box before he sendt it, roaming around in the box during shipping the - minus , gray/black output binding post broke off. Marked in the picture.(Not a picture of the actual meter with the broken terminal.)So where can i get one new, old, used..? I tried leader USA, no answer..I will appreciate any help...Erik" alt="" class="bbc_img" />" alt="" class="bbc_img" />

author: bob91343
author_rank: Super Contributor
timestamp: September 07, 2021, 12:03:00 am
content: Hard to see in the pic but likely it's a '5-way binding post' or similar.

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: September 07, 2021, 12:21:06 am
content: Thanks bob91343 !! It helped me to know the name of it, "5 way binding post" , got better search results, tham searcing just for "binding posts"This may be better..The are thinner tham other makes of instruments use." alt="" class="bbc_img" />

author: bob91343
author_rank: Super Contributor
timestamp: September 07, 2021, 05:29:38 am
content: That isn't a 5-way binding post. A 5 way has 5 methods of connecting and was widely used for a long time. The ones you have are different but they are equally popular. I have them on some units, especially power supplies.

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: September 07, 2021, 01:05:09 pm
content: Well, that answered a question that came to my mind, five way.. how was that logical. But search on digi and others gave more results by using that, still not found a exact copy, but as with everything else on the bench, in the house, in the garden, it's a work in progress!

author: bob91343
author_rank: Super Contributor
timestamp: September 07, 2021, 08:51:18 pm
content: Maybe something like this:https://www.digikey.com/en/products/filter/banana-and-tip-connectors-binding-posts/310?s=N4IgjCBcoMwOxVAYygMwIYBsDOBTANCAPZQDaIMArGAAwBsAHCALqEAOALlCAMocBOASwB2AcxABfQgxg1EIFJAw4CxMhToAmOHCasQnbnyFjJEiUA

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: September 08, 2021, 10:26:00 pm
content: I found these.. changing all 4 of them so they look alike..Think its gone be ok..https://www.ebay.com/itm/152616273018?hash=item2388a3847a:g:n3IAAOSwfCZcnJRq
Where did I see this DMM repair?  Random numbers due to input circuit problem - Page 1
Forum section: electronics / repair

author: mcovington
author_rank: Regular Contributor
timestamp: November 12, 2022, 09:26:20 pm
content: I think this was in an EEVBLOG video, and if not, someone else's video... to the best of my recollection, it was a DMM that displayed random numbers due to a fairly simple fault in its input circuit, I don't remember what. I have a similarly afflicted DMM. Does this ring any bells for anyone? (Mine is a Beckman DM25 and I have the schematic but have not started serious troubleshooting.)
Where do the Otari open reel tape deck folks hang out? - Page 1
Forum section: electronics / repair

author: cvanc
author_rank: Frequent Contributor
timestamp: October 20, 2020, 06:14:21 pm
content: Is there a forum where Otari knowledge resides?I've got a broken (and huge) MTR-10 2 track mastering machine. Would love to kick around the symptoms I'm seeing. I don't see one of these very often and would welcome outside expertise.Thanks!

author: andy3055
author_rank: Super Contributor
timestamp: October 20, 2020, 06:47:15 pm
content: Probably here?https://forum.tapeproject.com/index.php

author: GLouie
author_rank: Regular Contributor
timestamp: October 21, 2020, 03:47:28 pm
content: Try gearslutz.com in the Geekslutz subforum.Also tapeheads.net, although it's more consumer focused.I think there used to be a Yahoo Group, but Yahoo Groups is now gone.Be prepared to describe exactly which version you have (pop the top and read the ID tag inside).What are your problems?

author: cvanc
author_rank: Frequent Contributor
timestamp: November 02, 2020, 11:19:34 pm
content: Quote from: GLouie on October 21, 2020, 03:47:28 pmThe machine powers on; power supply seems OK. It "looks alive" (displays make sense, capstan rotates when tape loaded) but the CPU card never lights the front panel RUN green LED and it never enters play mode. No response to transport buttons.I'll ask over at gearslutz, thank you.
Where in 2022 can you get *decent* square drive belts (CD tray)? - Page 1
Forum section: electronics / repair

author: cvanc
author_rank: Frequent Contributor
timestamp: January 18, 2022, 01:29:31 pm
content: I'm in the US and seem to find a ton of 1x1mm square belts but these are much too lightweight to use in older gear. I can't find fatter belts anywhere.I often need 1.5x1.5 and 1.7x1.7 in lengths mostly suited to CD/DVD drive trays. Does anyone know of a source that's still in business? Thanks.

author: austfox
author_rank: Regular Contributor
timestamp: January 18, 2022, 01:46:07 pm
content: If you get stuck there is WES Components in Sydney that sell 1.0, 1.2, 1.4 and 2.0 mm square belts in various lengths (diameter), and do ship internationally.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: January 18, 2022, 02:07:11 pm
content: https://cpc.farnell.com/search?st=drive%20belt

author: Jeff eelcr
author_rank: Frequent Contributor
timestamp: January 18, 2022, 03:31:40 pm
content: Projector recorder belt co. (russell ind..)Distributers.Jeff

author: edavid
author_rank: Super Contributor
timestamp: January 18, 2022, 04:09:04 pm
content: Quote from: Jeff eelcr on January 18, 2022, 03:31:40 pmHere's the URL:http://russellind.com/prbline/index.html
Where to buy high quality components - Page 1
Forum section: electronics / repair

author: P_M
author_rank: Newbie
timestamp: February 04, 2024, 09:28:11 pm
content: Hi.I’m about to recap my Yaesu FRG-7 and want high quality electrolytics, ie 105 deg C, 4000 hr plus. Mouser sell them, but is there anywhere I can buy such a small order such as these? 15 electrolytics at most.Thanks,Paul

author: shakalnokturn
author_rank: Super Contributor
timestamp: February 04, 2024, 10:20:10 pm
content: I don't know their policy in Oz, in France Radiospares will sell in small quantities and ship for free if an order is placed during a weekend on the "hobbyist" version of the website.Searching the hobby site is a nightmare so it's convenient to do a first search on their professional site then copy the reference numbers over.

author: fmashockie
author_rank: Frequent Contributor
timestamp: February 04, 2024, 11:23:38 pm
content: Maybe it is because you are located in Australia, but Mouser will sell most of their components in small quantities.

author: Stonie
author_rank: Newbie
timestamp: February 05, 2024, 01:27:32 am
content: UK expat based here in Singapore... so not too far away from you in Oz.I've had no trouble obtaining small quantities from Mouser for all my projects over the years. In fact, I took delivery just this week of a small quantity for restoration of my Tektronix scope.The only thing you "may" need to be aware of is their shipping cost threshold. Above a certain (total) order cost threshold, shipping is free... below that threshold, you have to pay shipping etc.Ordering via Mouser Singapore, the components are still shipped from the US.I think Digikey, RS, and Element 14 all do the same, as all four are competing against each other for one's business !
Where to find 1/4W through hole fusible resistors (small quantity) - Page 1
Forum section: electronics / repair

author: nuno
author_rank: Frequent Contributor
timestamp: June 11, 2020, 07:17:22 am
content: Looks like I'm having trouble finding them (I'm in Europe), specifically in the 1/4W power rating. 1/2W seems much easier to find.This is for Sony '80s - '90s equipment repair.Any suggestions?

author: coromonadalix
author_rank: Super Contributor
timestamp: June 11, 2020, 10:26:54 am
content: You can use thru hole pico fuses, you have some auto reset ones and other physically similar to a resistor but its a fuse, green colored or yellow colored

author: mikerj
author_rank: Super Contributor
timestamp: June 11, 2020, 11:16:17 am
content: What value resistor do you need?

author: jh15
author_rank: Frequent Contributor
timestamp: June 11, 2020, 07:39:00 pm
content: Mouser should have pico fuses as does my local store. I was supposed to be starting on a Portugal Viking river cruise when the crap started. could have been stranded at airports or something if the timing was different . Dodged a bullet.I'll be sure to bring a ham rig from now on if stuck somewhere for fun.

author: nuno
author_rank: Frequent Contributor
timestamp: June 12, 2020, 12:49:25 am
content: Currently I need a pair of 100 Ohm and a 2.2 Ohm. So "pico fuse"... I'll look into that. Many thanks to all!Viking RiverIt's probably on the Douro River up north, a beautiful mountainous place cutting Portugal east-west from Spain to the sea. Homeland of the OPorto Wine.

author: jh15
author_rank: Frequent Contributor
timestamp: June 18, 2020, 03:55:06 am
content: thanks nuno I look forward to touring your country. Just wish wife and Viking could delay it till things are safe. Know any hams in your area?

author: nuno
author_rank: Frequent Contributor
timestamp: June 20, 2020, 10:53:04 am
content: Sorry, don't know of any hams, I'm not into "haming". But there are other users from Portugal here, I think I saw someone commenting on radio stuff some time ago, but I can't remember any details anymore.Here it all started up north, but it is quite calm there now. Currently, more than 90% of new cases (currently less than 300/day) are poping up in the Lisbon area (center - south), usually in clusters (like factories), average daily deaths are at ~2 for the past week or so.

author: Kleinstein
author_rank: Super Contributor
timestamp: June 20, 2020, 11:08:39 am
content: Mouser still has 82 Ohms as 1/4 W, but that's about it in 250 mW, at least from Germany.

author: nuno
author_rank: Frequent Contributor
timestamp: June 20, 2020, 11:31:31 am
content: I bought some thermal fuses, I'll make some experiments of thermal coupling a normal 1/4W resistor to a thermal fuse, electrically connected in series.

author: fzabkar
author_rank: Super Contributor
timestamp: June 20, 2020, 11:27:55 pm
content: In Australia I buy fusible resistors from WES Components (Wagner Electronics). They supply to the audio/video/TV repair trade. Perhaps there is a similar supplier in Europe?How about Dönberg Electronics (Ireland)?https://www.electronic-spare-parts.com/search?query=fusible+resistor
Where to find a MA60H383 (wireless mouse IC)? - Page 1
Forum section: electronics / repair

author: Strand17
author_rank: Contributor
timestamp: November 14, 2023, 03:28:50 pm
content: Hello,I am troubleshooting a 2.4 GHz wireless mouse and suspect that the main IC, a MA60H383 from MosArt, needs to be replaced.Does anybody know where I can buy a small number of MA60H383's?Note that the part I need to replace has a 28 pin package. There is an offer on Aliexpress for MA60H383's, but in TSOP20 package. I am not sure if this is the same IC in a different package or something entirely different.On a side note, I would also be interested in the datasheet, in case anyone has a copy.Thank you in advance!Best regards, Jonas

author: fzabkar
author_rank: Super Contributor
timestamp: November 14, 2023, 06:05:06 pm
content: That chip is used in the KG658A Wireless Keyboard, but it's a 64-pin package:https://fccid.io/2A2B5-KG658A/Schematics/Schematics-6845104Here is a 16-pin version:https://www.880by.com/14048.htmlhttps://img.alicdn.com/imgextra/i2/54574740/O1CN01XcaKPw1ksxyA5qFRn_!!54574740.jpg

author: Strand17
author_rank: Contributor
timestamp: November 16, 2023, 03:56:52 pm
content: Interesting that there are so many different packages of the same chip. Unfortunately I have not been able to find the data sheet.The mouse I am troubleshooting is a "DXT Mouse 2 Wireless".https://kinesis-ergo.com/shop/dxt-wireless-mouse2/The 28-pin chip used the the DXT mouse also appears in the Adesso iMouse T40 and T50https://forum.trackballs.eu/viewtopic.php?t=50https://forum.trackballs.eu/viewtopic.php?t=20Best regards, Jonas

author: Maverickmonk
author_rank: Newbie
timestamp: February 02, 2024, 12:09:45 am
content: Even I'm facing same issue. I got MA641EJ-7 at USB receiver end and MA3812-3 on the mouse PCB. Specifically it's Cherry MW4500 mouse that somehow started to heat up the PCB, blew a resistor and a capacitor, caused Alkaline batteries to get extremely hot.Any amount of googling for Datasheets revealed none. I couldn't even find the manufacturer for the generic wireless ICs. All I found is a few similar looking kits sold ontradekorea.comwith suspiciously similar model numbers. Also found a few missing links from cached AliBaba.com products. My guess is Chinese manufacturer but exact question is who?
Where to find a non-standard LiPo pouch battery? - Page 1
Forum section: electronics / repair

author: e100
author_rank: Frequent Contributor
timestamp: July 05, 2024, 06:34:11 am
content: This is a protected 3.7v LiPo cell from my bicycle LED light.The current dimensions are 55 x 27 x 11mm and the original capacity was 2000mAh.The black adhesive foam piece is there for padding.It doesn't look particularly bloated so I imagine that a new replacement cell would be very similar in size, however my google searches aren't finding anything so presumably it was a custom size made for that particular model of light.

author: tooki
author_rank: Super Contributor
timestamp: July 05, 2024, 08:10:03 am
content: See the “112556” printed on it? That’s almost certainly the nominal dimensions: 11 x 25 x 56. Searching for those dimensions, or for the size code, may be more fruitful.

author: cruff
author_rank: Regular Contributor
timestamp: July 05, 2024, 11:15:02 pm
content: I tried a search and did not find anything obvious. Lots of other batteries of other sizes though.

author: tooki
author_rank: Super Contributor
timestamp: July 06, 2024, 08:39:41 am
content: I found some mentions of them, so they do exist, but I didn’t search for vendors.What certainly seems to be a lot more common is 112560, i.e. 5mm longer. OP, would that potentially work? If you’ve got those 5mm to spare, then the slightly longer version would be a simple replacement.If not, you could sacrifice a bit of battery life and install a slightly smaller battery, like the common 102050.

author: Infraviolet
author_rank: Super Contributor
timestamp: July 07, 2024, 10:51:46 pm
content: I don't believe there actually are standard sizes for pouch cells?

author: e100
author_rank: Frequent Contributor
timestamp: July 18, 2024, 08:24:24 am
content: Quote from: tooki on July 06, 2024, 08:39:41 amAn update, I ordered a 112560 battery with the expectation of having to modify the light, however when it arrived it turned out to be the same length and about 2mm thinner than the original 112556 battery, so hopefully it'll just be a simple drop in replacement.Battery sizing is weird.

author: Smokey
author_rank: Super Contributor
timestamp: July 18, 2024, 08:37:31 am
content: Check these guys out.https://www.dtpbattery.com/They have a ton of stock items, and make custom stuff too.
Where to find a replacement 35 Mohm NTC / thermistor? - Page 1
Forum section: electronics / repair

author: TheAmmoniacal
author_rank: Unknown
timestamp: May 19, 2020, 08:01:54 am
content: I'm trying to fix a PCR machine / thermocycler, the only fault I can find with it is a broken temperature sensor in the heater block (it reads open / OL ).The other sensor in the heatblock seems to work and reads 35 Mohm at room temperature and drops to about 25.5 Mohm at 45 C.Problem is I can't seem to find a comparable part / replacement anywhere? Anyone know?

author: ace1903
author_rank: Regular Contributor
timestamp: May 19, 2020, 09:30:52 am
content: 35Mhom is quite an unusual value. I would guess that is sensor misidentification. That ohmic range is probably an intrinsic silicon sensor.Possibly but only if cycling is at extreme temperature ranges.But PCR is at ~room temperatures I guess.Give us more info about equipment, pictures, how sensor looks like.If electronic is simple I think it is 1N4148 used as sensor and 35Mhohm is because of the wrong polarisation.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: May 19, 2020, 09:35:32 am
content: Try diode test rather than ohm test.Tim

author: TheAmmoniacal
author_rank: Unknown
timestamp: May 19, 2020, 09:59:30 am
content: That would explain a lot..In diode mode both reads 2.6 V in one direction at room temperature. Neither appears to be faulty then.. Any idea how the temperature sensing works here?

author: Kleinstein
author_rank: Super Contributor
timestamp: May 19, 2020, 04:34:30 pm
content: The forward voltage of a diode makes a reasonable temperature sensor: relatively low noise, low power and still low resistance, cheap and linear from some -150 C to +150 C with some -2 mV/K for silicon (more accurate 1.12 V extrapolated to 0 K, so that a single point adjustment can be be sufficient).The 2.6 V may be several diodes in series for an average temperature - this would be still a little unusual.

author: fzabkar
author_rank: Super Contributor
timestamp: May 20, 2020, 09:41:25 am
content: Could this be what it is?https://en.wikipedia.org/wiki/Silicon_bandgap_temperature_sensor
Where to find HDMI retimer chip on Xbox One motherboard? - Page 1
Forum section: electronics / repair

author: bender120
author_rank: Newbie
timestamp: October 29, 2022, 09:09:02 pm
content: Hi guys, I wanted to replace the HDMI retimer since my HDMI port is fine and the Xbox isn´t showing any image, but I can´t even find the chip on the motherboard. I have looked for TDP158 and 75DP159, but can´t find any of those chips.All the videos that I´ve watched on YT seems to have a different motherboard than mine. I don´t even know which version of Xbox I have, since I´ve bought it used and it says Model 1540 underneath of the console.

author: fzabkar
author_rank: Super Contributor
timestamp: October 30, 2022, 12:46:12 am
content: There isn't any.https://www.ifixit.com/Teardown/Xbox+One+Teardown/19718https://guide-images.cdn.ifixit.com/igi/RkWPgfeRsJdBcOcx.fullThe Xbox One S has a HDMI retimer.https://www.ifixit.com/Teardown/Xbox+One+S+Teardown/65572https://guide-images.cdn.ifixit.com/igi/4qPjjmOIeWfobRNR.full

author: bender120
author_rank: Newbie
timestamp: October 30, 2022, 08:33:52 am
content: Quote from: fzabkar on October 30, 2022, 12:46:12 amThanks, if there is no HDMI retimer, then I don´t know where the problem isThe pins from HDMI-Port are all fine, couldn´t find any issue there. I´ve also tried to reset the image resolution (by pressing Eject and Power button), but still no image. I couldn´t find any burned components either

author: Bicurico
author_rank: Super Contributor
timestamp: October 30, 2022, 02:33:12 pm
content: Sorry, don't mean to insult.I had problems with no HDMI picture on my Xbox One and the first time it was a bad cable, the second time I connected the cable to the input instead of output.

author: wraper
author_rank: Unknown
timestamp: October 30, 2022, 02:44:39 pm
content: Measure resistances on HDMI TMDS lines to GND. Dunno about Xbox one in particular, but usually you should get something in megaohm range and almost the same for all pins. Also it's best to manually select the maximum resistance range your multimeter has. If some pin has much lower resistance that others, then either the chip outputting video or ESD protection device is damaged. If completely open, more likely some small filter or ESD protection device knocked off the board. If resistances are ok, then port is likely fine. Also you should check DDC lines and if 5V is present on the port.

author: bender120
author_rank: Newbie
timestamp: October 30, 2022, 05:41:58 pm
content: Quote from: Bicurico on October 30, 2022, 02:33:12 pmIt´s fine, I´m pretty sure that everyone has been on that path in their life. Cable and correct HDMI-Port are all good.Quote from: wraper on October 30, 2022, 02:44:39 pmToday I tried to install the updates using an USB-Stick, hoping that the hard drive must be faulty, but nothingthere should be 2 "beeps", but I hear only one. I will follow your suggestion when I open it again, I hope something is damaged on the board
Where to find KA1H0265R or Replacement - Page 1
Forum section: electronics / repair

author: jamorais
author_rank: Newbie
timestamp: February 18, 2021, 06:01:51 pm
content: Hello everyone.I'm repairing a power supply which has a Fairchild Power Switch with reference KA1H0265RNow, i can't find a new one to buy except ebay or similar. Does someone knows of a good replacement part?The ones i can find are all 5 or more pins, which have newer functions.Thanks in advance!

author: bob91343
author_rank: Super Contributor
timestamp: February 18, 2021, 10:35:40 pm
content: What's wrong with ebay? I buy a lot through them.

author: fzabkar
author_rank: Super Contributor
timestamp: February 19, 2021, 12:51:05 am
content: This is the datasheet for the KA5H0265R:http://pdf.datasheetcatalog.com/datasheets/70/389776_DS.pdfIt looks similar and is available from Digikey:https://www.digikey.com/en/products/detail/fairchild-semiconductor/KA5H0265RCTU/12110005?s=N4IgTCBcDaINIEECsAJADGAbEgSiAugL5A

author: jamorais
author_rank: Newbie
timestamp: February 19, 2021, 08:59:45 am
content: Quote from: fzabkar on February 19, 2021, 12:51:05 amThank you so much. Don't know how i missed it.But it surely looks similar. I'll try it.

author: jamorais
author_rank: Newbie
timestamp: February 19, 2021, 09:17:35 am
content: Quote from: bob91343 on February 18, 2021, 10:35:40 pmNothing wrong. I buy there too. But most of the available parts are from Asia or US. Which for me usually means huge transit times and a higher chance of getting lost.In fact i even found some from the UK on ebay. But since the brexit mess, things are not going well. Longer transit times, customs people are still adjusting to processing things from the UK... so it's almost like ordering something from china..we'll have to wait for things to fall into place.That's why i prefer to use a reputable online shop when i can. Peace of mind!Thanks!
Where to find small knobs for HP 54601A Oscilloscope - Page 1
Forum section: electronics / repair

author: Irving
author_rank: Newbie
timestamp: November 28, 2020, 09:29:21 pm
content: As per topic subject, the small knob for trigger level has disintegrated and some of the others are looking dodgy. I'd like to keep it original if possible.. where can I source them from?

author: rvalente
author_rank: Frequent Contributor
timestamp: November 28, 2020, 09:53:51 pm
content: You just can't as they are not manufactured anymore then, you've got options:#1 - Source for used or maybe old stock (ebay?), witch will pretty much worn out again as degraded plastic behaves weirdly.#2 - 3D print them in resin...

author: Irving
author_rank: Newbie
timestamp: November 29, 2020, 12:03:54 pm
content: Thanks,I figured that might be the case....

author: tautech
author_rank: Super Contributor
timestamp: December 01, 2020, 08:18:28 am
content: Have you checked this thread for an already existing 3dp model ?https://www.eevblog.com/forum/testgear/replacement-knobs-feet-and-fittings-for-test-equipment/

author: Irving
author_rank: Newbie
timestamp: December 03, 2020, 07:41:29 pm
content: Quote from: tautech on December 01, 2020, 08:18:28 amThanks for that, sadly I can't see anything suitable there or on some of the external links. I'll have to CAD something myself....
Where to find this heatsink - Page 1
Forum section: electronics / repair

author: queennikki1972
author_rank: Regular Contributor
timestamp: September 25, 2019, 04:05:27 pm
content: Sorry if I posted in the wrong area, I wasn't sure where to put it..I'm trying to locate the tall skinny heat sink in the images or something similar... Not the small one. I have a spot that is very narrow. I do not know the name except that it is to-220 type. Any links or suggestions. I will try to measure it and post size.

author: queennikki1972
author_rank: Regular Contributor
timestamp: September 25, 2019, 04:09:04 pm
content: 30mm tall x 15mm wide x 17mm deepFound these, but not nearly as thick..https://www.amazon.com/TOTOT-15x10x30mm-Aluminum-Mounting-Radiator/dp/B07JFWWP9J/ref=sr_1_2?keywords=to-220+heatsink+30x15&qid=1569427870&s=electronics&sr=1-2
where to get these battery packs?  - Page 1
Forum section: electronics / repair

author: Ogitek
author_rank: Regular Contributor
timestamp: January 19, 2024, 08:42:49 am
content: where to buy batteries in series?

author: wasedadoc
author_rank: Super Contributor
timestamp: January 19, 2024, 03:48:14 pm
content: You could make your own packs by purchasing 12 tagged NiMH cells and reusing the wires from the original packs. Get cells that are at least 2200mAh as the charging circuit probably trickle charged the original NiCd cells. NiMH cells should be trickle charged at a lower percentage of the capacity rating than NiCd cells.

author: tooki
author_rank: Super Contributor
timestamp: January 20, 2024, 09:16:28 am
content: Quote from: Ogitek on January 19, 2024, 08:42:49 amEditing the original post to remove all contactafter someone has repliedis hella rude.
Which are the most important capacitors on Sega MegaDrive for image clarity? - Page 1
Forum section: electronics / repair

author: OverclockVintage
author_rank: Contributor
timestamp: April 21, 2022, 08:33:47 pm
content: Hi, i would like to replace only the capacitors that can improve image clarity, does anybody know which of them are? Mine is the Mega Drive model1 VA3.Thanks if you can help me.
Which connector is this? - Page 1
Forum section: electronics / repair

author: objekt406
author_rank: Newbie
timestamp: October 11, 2021, 06:46:02 pm
content: Hi, i just played around with my AIM TTI PL303QMD PSU and noticed something strange. First the view button doesnt work anymore, which normally when the output is active should show the preset values and second, the output of the PSU remains on after powering it off and on, which shouldnt be like that. As the PSU consists of 2 PSUs internally, i checked the other side, which worked flawless. Now my question, i changed the fans for some quieter Noctua fans, and im planning on RMAing the PSU, as it still is under warranty. I wanted to install the original fans when sending it in, but i unfortunately cut the connectors off the original ones, to use the Noctua fans. Can anyone tell me, which connector was used?

author: wraper
author_rank: Unknown
timestamp: October 11, 2021, 07:06:45 pm
content: Looks like MTA-100. And I see little sense in changing the fans in this PSU. Improvements will be marginal, unless you screw up the airflow to make it less noisy when fans spin up under high load.

author: objekt406
author_rank: Newbie
timestamp: October 11, 2021, 07:12:57 pm
content: Nice, that looks like its the right one. Regarding the fan, i am a little too sensitive to bearing noise, that was the main reasonThanks for the quick answer
Which Diode is this - Page 1
Forum section: electronics / repair

author: badbus28
author_rank: Newbie
timestamp: June 20, 2023, 02:31:33 pm
content: So I came across this diode in the circuit. Which is showing continuity with both polarity. I guess it is bad. Is there any other way to make sure it is not working. Also does anybody know what diode is this?

author: BrokenYugo
author_rank: Super Contributor
timestamp: June 20, 2023, 02:39:46 pm
content: Desolder one leg and check again. It has some markings on it, once desoldered you'll be able to see around the whole thing and read them.

author: badbus28
author_rank: Newbie
timestamp: June 20, 2023, 02:41:42 pm
content: Does it matter if I desolder any of the leg?

author: David Hess
author_rank: Super Contributor
timestamp: June 20, 2023, 03:06:59 pm
content: Quote from: badbus28 on June 20, 2023, 02:41:42 pmNo, either leg can be desoldered for testing, however I might desolder both for easier access.

author: badbus28
author_rank: Newbie
timestamp: June 20, 2023, 03:09:22 pm
content: Thanks. I will do that

author: max.wwwang
author_rank: Frequent Contributor
timestamp: June 21, 2023, 09:40:37 am
content: The photo seems to suggest "1N" so probably the "general purpose" type likethese? Due to the existence of other components, a good diode may not show open when negatively biased in measuring. Not sure what you exactly mean by saying "showing continuity". But if you get a voltage drop of something like 0.5-0.6V (or anything less but not close to 0) both ways with the diode mode of your DMM, I guess is probably ok (at least it's not short). But taking one leg (any one) out to measure is a good idea, so you can be sure.

author: gamalot
author_rank: Super Contributor
timestamp: June 21, 2023, 09:53:38 am
content: It looks like a 1N4148.

author: coromonadalix
author_rank: Super Contributor
timestamp: June 21, 2023, 10:36:57 am
content: lots of zenners begin with 1n ..... simply power up the circuit and measure on each side0.6v is an 1n914 1n4148 ... higher is a zenner
Which rotary encoder is this ? - Page 1
Forum section: electronics / repair

author: Kingpin
author_rank: Newbie
timestamp: February 27, 2021, 12:31:24 pm
content: Hello,I'm looking for a replacement encoder but can't find the right part number.Does anyone know which type this is:Thanks

author: Kingpin
author_rank: Newbie
timestamp: February 28, 2021, 10:49:27 am
content: Belongs to a GeneralMusic WK4 keyboard.Found a partnr 110254

author: Twoflower
author_rank: Frequent Contributor
timestamp: February 28, 2021, 11:00:58 am
content: As they are 'only' behave like two switches that opens close in a specific manner you probably don't need the exact part. As the decoder obviously was connected via wires helps a lot. That means only the the number of detents, the axis type/length and the mounting option is important.Eventually you'll find a replacement here:https://tech.alpsalpine.com/prod/e/html/encoder/incremental/ec12e/ec12e_list.html. They are all intended for PCB mounting, but some have a thread as well.

author: Kingpin
author_rank: Newbie
timestamp: February 28, 2021, 11:30:09 am
content: Thanks.Found out is has 24 detents and a schematic:

author: Twoflower
author_rank: Frequent Contributor
timestamp: February 28, 2021, 11:47:41 am
content: Purely guessing on the dimensions here, this one looks like a matching candidate:https://tech.alpsalpine.com/prod/e/html/encoder/incremental/ec12e/ec12e2420801.htmlBut you should go through the specifications if that one will do for you. For example the original part has a pin to prevent rotation of the encoder itself. The Alps does not have that, but a flatted thread. So you might need a special washer that holds into the flattened thread and provide the pin that goes into the front panel.

author: Kingpin
author_rank: Newbie
timestamp: February 28, 2021, 01:07:21 pm
content: Thanks !I think this is the direction I'm looking for.

author: tunk
author_rank: Super Contributor
timestamp: February 28, 2021, 01:26:54 pm
content: Why not take it apart - you might be able to fix it.

author: Kingpin
author_rank: Newbie
timestamp: February 28, 2021, 02:34:38 pm
content: That's an option. But i never did.
Which software for CH341A Mini programmer? - Page 1
Forum section: electronics / repair

author: panoss
author_rank: Frequent Contributor
timestamp: March 26, 2020, 12:09:59 pm
content: I 'm referring tothisprogrammer.I tried:1.This.2.This.And a few others. All of them are infected by viruses, trojans, adwares and who knows what else.The cleaner of all is the #1, here is the result from VirusTotal:So how will I know if it 's a false detection or it is really infected?Does anybody have a really clean software for this programmer?

author: picburner
author_rank: Frequent Contributor
timestamp: March 26, 2020, 01:11:56 pm
content: I have tried now the "CH341A programm v1.34.rar" file with Norton Security and Malwarebytes 4.1.0: no positives.You do well to check because it is always better prevent than cure, but sometimes antiviruses can find false positives too.

author: senso
author_rank: Frequent Contributor
timestamp: March 26, 2020, 02:44:33 pm
content: flashrom, no need for dubious rar files..https://www.flashrom.org/Flashrom

author: panoss
author_rank: Frequent Contributor
timestamp: March 26, 2020, 03:21:42 pm
content: Quote from: picburner on March 26, 2020, 01:11:56 pmThe only antivirus program that detects it is the 'CAT-QuickHeal antivirus'.Quote from: senso on March 26, 2020, 02:44:33 pmThis is for Linux. (It's supposed to have binaries for Windows but the related links are dead)(also it offers the option of compiling from source but this is a too long process)I 'm looking something for Win 7 32bit.

author: aqibi2000
author_rank: Regular Contributor
timestamp: March 26, 2020, 05:26:54 pm
content: Are you allowed to be a Windows user on this forum?

author: kripton2035
author_rank: Super Contributor
timestamp: March 26, 2020, 06:10:32 pm
content: did not try it but there is some infos here :https://github.com/boseji/CH341-Store

author: panoss
author_rank: Frequent Contributor
timestamp: March 26, 2020, 07:22:11 pm
content: Quote from: kripton2035 on March 26, 2020, 06:10:32 pmThis must be good but it's in...chinese!

author: xavier60
author_rank: Super Contributor
timestamp: March 27, 2020, 01:30:42 am
content: I have been using this for the last 5 years with XP with no noticeable problems.I got a virus warning as soon as I opened it on a Windows 10 PC.Try at your own risk. Ill remove it if anyone thinks that I should.

author: Rasz
author_rank: Super Contributor
timestamp: March 27, 2020, 03:05:11 am
content: its best to keep sacrificial old laptop for this kind of stuff, any problems just reimage the drive
Whirlpool duet MCU Repair Power transistor ID - Page 1
Forum section: electronics / repair

author: ange1azrae1
author_rank: Newbie
timestamp: September 14, 2022, 04:21:00 pm
content: I am looking to repair the MCU of a Whirlpool duet washer and really lost as to the parts are, need a number to order a replacement. The Bridge rectifier and the Power transistors(transistors are combined in one package) have id's but cant find anything with a search. The Model number of this MCU is WPW10374126. I am trying to identify & find a replacement for the bad chip. The picture is of the chip in question removed and of what it looked like on the board.Thanks in Advance!

author: Andy Watson
author_rank: Super Contributor
timestamp: September 14, 2022, 04:30:19 pm
content: The chip you have pulled-off looks like a standard bridge rectifier to me. 600V 8A

author: ange1azrae1
author_rank: Newbie
timestamp: September 16, 2022, 06:36:27 pm
content: Replaced the Bridge & unit is now functioning normally. Thanks!!
Whistler ws1065 scanner radio problem - Page 1
Forum section: electronics / repair

author: p5200
author_rank: Contributor
timestamp: January 31, 2021, 02:45:47 am
content: Hello, this scanner started picking up nearby counties on the MOSWIN P25 Phase 1 system not nearly as often as it did very seldom, does it receive them much at all any more. I have another scanner in the other room that still, receives said counties the same as always I've even hooked this unit to the other ones antenna to rule that out. Also, I replaced the EEPROM Memory ic which, were suppose to be known to fail causing same type symptoms. I've downloaded the Radio Shack pro 197 service manual which, is the same radio but, I'm not that educated on Digital radio functions so, I don't know what else to check other than circuit board defects which I've done several times now. Any suggestions would be greatly appreciated. The only test instruments I have is a Fluke 87V multimeter.
White silicone on plasma tv power supply board? - Page 1
Forum section: electronics / repair

author: wadmancpu
author_rank: Contributor
timestamp: May 15, 2019, 01:26:17 am
content: Anyone know what the white silicone like packing they put around fets and other components on power supply boards is? Purpose? Thanks.

author: Dacke
author_rank: Regular Contributor
timestamp: May 15, 2019, 03:27:57 am
content: If you mean around the legs of FETs, it's just an extra measure to prevent dust buildup between the pins which can cause a short or arcing. Usually more so around the PFC FETs as these operate at a higher voltage. You also might commonly see isolation slots between the pins as well. If you see the glue on other components like caps or inductors, it's mostly for structural support.
Whitening a 1993 Bose Wave Radio? - Page 1
Forum section: electronics / repair

author: rfengg
author_rank: Regular Contributor
timestamp: October 16, 2019, 12:57:15 am
content: Subject to sunlight in our living room over the past many years, the once white external case plastics on our 1993 Bose Wave Radio, has yellowed similar to the hue of the setting sun.Searching the web has not given me any great positive answers on how to get it back to the original color.......some repair sites advocate the use of fine sandpaper which I am averse to doing in fear of losing the original finish......would appreciate any practical tips on this?

author: xrunner
author_rank: Super Contributor
timestamp: October 16, 2019, 01:01:07 am
content: Get a small bottle of hydrogen peroxide gel from beauty supply store. Smear on the plastic and cover with saran wrap. Place in sun for a few hours. I've done this before and it works wonders.
Who cna repair a Yaesu FT-100 (not a D) for me? - Page 1
Forum section: electronics / repair

author: k8jcr
author_rank: Newbie
timestamp: May 11, 2021, 04:43:17 am
content: I recently bought a yaesu FT-101. It worked great, then I had problems with operating CW. It showed no output. Then I lost transmit on VHF and UHF. I understand those are expensive and hard to find.What I would like is someone who can repiar my 100. The CW transmit is out, but Am/FM/SSB work fine. Works on 6, and HF.Any suggestions gratefully accepted. thanks and 73Gary K8JCR
Whole-glued PCB taking apart - Page 1
Forum section: electronics / repair

author: marhuum
author_rank: Contributor
timestamp: January 14, 2025, 11:01:01 am
content: How is the most efficent, correct way to take apart a PCB which is a entirely laminated/glued in such that no one can normally act to flip around to face the PCB's PC ie. printed circuit side ?It's old front-load Samsung wash machine's (but made in China) whose On-Off tactile push switch spring was dysfunction and then its pins have been broken too because has been pull apart forcefully it's sitted at top-right spotUseful correct guidance or info is invaluable, gratified

author: inse
author_rank: Super Contributor
timestamp: January 14, 2025, 11:18:16 am
content: This PCB is potted, usually only to be removed mechanically.Is the potting compound hard or soft?

author: Greybeard
author_rank: Frequent Contributor
timestamp: January 14, 2025, 11:27:43 am
content: You can try hot air in combination with mechanical scratching tools.

author: marhuum
author_rank: Contributor
timestamp: January 14, 2025, 11:43:56 am
content: Quote from: inse on January 14, 2025, 11:18:16 amI believe it's soft, as we can see a bit white due to as a scraped part on top-right corner, by end-sharp metal shaft

author: inse
author_rank: Super Contributor
timestamp: January 14, 2025, 12:05:12 pm
content: Or carefully grind an orifice from the back side to access the solder pads, might be less effort

author: ciradrak
author_rank: Contributor
timestamp: January 14, 2025, 09:01:23 pm
content: I'm trying to fix a similar machine. Is the encasing material silicone? On mine I extracted the board by using a small Dremel cut off wheel on the hard plastic case & then prying away the encasing silicone using a large plastic spudger to avoid damage to the circuitboard.I tested mine to see if the soft clear material around the board would melt using a soldering iron. It did not melt at all.

author: max.wwwang
author_rank: Frequent Contributor
timestamp: January 15, 2025, 07:02:25 am
content: Potting is commonly seen, based on my experience, with the boards of Samsung washing machines. It's convenient for the manufacturer, but looks super ugly and is painful for people who need to repair or salvage parts from them. I hate it.

author: Poroit
author_rank: Frequent Contributor
timestamp: January 16, 2025, 07:49:37 am
content: as per @inse post.CAREFULLY dig it out manually.It can be a frustrating process !!

author: inse
author_rank: Super Contributor
timestamp: January 16, 2025, 08:00:42 am
content: I know, that‘s why I proposed destructive approach only to expose pads of ripped out switch
Why does my HP 8568A spectrum analyzer have such a high noise floor? - Page 1
Forum section: electronics / repair

author: gabor.dani
author_rank: Contributor
timestamp: September 16, 2020, 11:42:53 am
content: I bought a HP 8568A + HP 85662A for 50 bucks. I was able to get it to a working condition but it has very high noise floor. Where should I start looking?- blown caps replaced- EMS filter lit on fire in about 2 minutes of use, replaced- missing interconnect cables, created one, but I do not want to see soldering iron for the next 2 weeks.- blown rectifier diodes replaced- input limiter works fine, removing it does not change anything.- amplitude manual cal done- frequency manual cal done- error correction auto cal fails with "ADJUST AMPTD CAL" message. It is trying to see the top of the cal signal in very low res bw, and there is a ripple on it.

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: September 16, 2020, 12:24:22 pm
content: Hi,Here are pictures from my 8566A under the same conditions:andI would start by looking for ripple on the power supply rails. Then I would look for high ESR capacitors in the YIG control circuit.Regards,Jay_Diddy_B
why does resetting a audio amp make it stop buzzing? - Page 1
Forum section: electronics / repair

author: coppercone2
author_rank: Super Contributor
timestamp: September 18, 2023, 01:04:15 pm
content: I have a HP supply amp set to a speaker for a year now. Sometimes (maybe once a month? sometimes much less) it gets this static hiss noise.All I need to do is turn it off and on again and it is quiet.Is it something with the power switch? makes a bit of a pop when you turn it on (normal)its fully analog device.my theory is that the switches are dodgy and the inrush current to the speaker cleans them out. treated with deoxit

author: Swake
author_rank: Frequent Contributor
timestamp: September 18, 2023, 03:54:07 pm
content: Static is frequently linked to grounding and picking up noise from the environment (LED power supplies are horrible) or bad wiring or... a million other things.A lot of things happen when off/on an amp or power supply, including emptying a lot of capacitors. There might be a component that touches the chassis (leaking) and builds up charge over time, speed depending on relative humidity. The minuscule temperature changes during the power cycle.

author: coppercone2
author_rank: Super Contributor
timestamp: September 18, 2023, 08:57:29 pm
content: i dunno that thing aint too tight in the chassis I don't see how something is shorting or touching
why is my problem fixed when I ground caps? - Page 1
Forum section: electronics / repair

author: loouser
author_rank: Newbie
timestamp: June 04, 2023, 09:39:53 pm
content: I have an audio device with two caps around an ic amp JRC2073. I replaced these two caps and the no audio fault remained, however by chance i shorted the exposed caps of these two with a finger each on one hand and got audio. My hand resistance was about 0.4mohn so i tried large resistor across instead and got audio too, why is this please? all the solder joints look and test good.

author: Psi
author_rank: Super Contributor
timestamp: June 04, 2023, 09:59:38 pm
content: You would need to find a circuit for that JRC2073 (maybe from datasheet), or trace out how it's connected in your device.Then show us which two caps and which side of the caps are being connected to make it work.
Why is my replacement triac not working? Hakko fx 888d - Page 1
Forum section: electronics / repair

author: mluna
author_rank: Newbie
timestamp: August 23, 2019, 01:13:42 am
content: I have a Hakko FX-888D soldering station which stopped heating the iron. I found out that the triac (which is a BTA06-600b) went bad so I went ahead and replaced it with a BTA12-600bw. It didnt work. The triac was off all the time even though it was getting its triggering pulses (I know because I saw it in the oscilloscope and compared it with another working soldering station of the same model and brand).The replacement triac was ok, it was knew and I also tested it outside the circuit.I know the problem was just that because later I soldered another triac of the same the station came with and it worked.If you check the datasheets of the two triacs you can see they are really close in specs, so, why didnt it work?

author: fzabkar
author_rank: Super Contributor
timestamp: August 25, 2019, 06:13:46 am
content: AFAICT, the BW version is snubberless and has a higher dV/dt rating, but is otherwise the same.https://www.st.com/resource/en/datasheet/bta12.pdf

author: David Hess
author_rank: Super Contributor
timestamp: August 25, 2019, 01:49:30 pm
content: The BTA12-600bw is less sensitive than the BTA06-600b under some conditions. (1) Supporting a higher dV/dt for snubberless operation is done by using a lower internal shunt resistance between the gate and anode which lowers sensitivity. So maybe the gate driver circuit is not quite powerful enough.This would also mean that the gate driver was marginal for the original TRIAC which might possibly explain failure of the original TRIAC. Marginal gate drive increases turn-on time and causes localized heating in the gate structure which can lead to poor reliability.(1) 70 versus 50 milliamps under certain conditions.

author: mluna
author_rank: Newbie
timestamp: September 02, 2019, 01:26:44 am
content: Thank you for the answers.I didn't really dig too much into the driving circuit; all I saw was the triac being driven by a transistor.Makes sense about the sensitivity. I'll take a look more in deep and keep this updated.Can't believe they designed that so tightly it can't work with such a close replacement.