hybridfree/eevblog-posts huggingface dataset:
Mean Well RST-10000 10kW 24V power supply without function  - Page 1
Forum section: electronics / repair

author: BUAROD
author_rank: Contributor
timestamp: October 22, 2021, 12:19:38 pm
content: I started this topic in "Other Equipment & Products" and changed to "Repair" now! I will explain the reason.After removing the top cover it seemed to be an easy job to change the output voltage from 24 V to 48 V:this 10 kW version is a parallel connection of two 5 kW units (picture 1).Mean Well allows up to 4 x RST-5000 to be connected in parallel (picture 2 and 3)to get up to ~20 kW of output power! Same you can do with connecting 2 X RST-10000 in parallel.My idea was to switch the two subassemblies in series to increase the output voltage to my desired 48 V.The idea failed with the result, that even after changing back to the original wiring the output is dead!Conclusion (as allready written in "Other Equipment & Products"):I think it is rather unlikely that components were damaged during the procedure.What I tend to believe: the "irregular operating condition" was stored as fatal error in the memory, forcing the system to a permanent shut down now!The PIC18F46K80 has a 1 kBit EEPROM inside ...Any helpful ideas how to procede without circuit diagrams and knowledge of the PIC`s software?PS: the communication between the two PICs is still active, but it looks different on the oszilloscope now ...Update Oct. 26, 2021:after checking several components I found two defective opto couplers. They enable remote switching of the output.The input circuitry of the RST-10000 PCB seems to be different to the regular RST-5000 PCB: with identical externalwiring the LEDs inside the opto couplers were damaged. After changing the couplers the power supply works again!
measuring ac voltages on a tv switchmode power supply - Page 1
Forum section: electronics / repair

author: ant17
author_rank: Regular Contributor
timestamp: January 20, 2021, 12:22:21 am
content: hi guys i am still working on my bn-44-00516a out of a plasma tv but i am having the trouble of when i try to measure the voltages on the board with my oscilloscope it just seems to show the 50 hz 240v signal on most of the components even the smd parts is it normal to have these phantom like voltages

author: S. Petrukhin
author_rank: Super Contributor
timestamp: January 20, 2021, 12:59:32 am
content: Maybe you have a problem with connecting the ground of the probe?

author: srb1954
author_rank: Super Contributor
timestamp: January 20, 2021, 01:03:01 am
content: Quote from: ant17 on January 20, 2021, 12:22:21 amIf you are making measurements on the primary (mains) side of a SMPS then 240V 50Hz is exactly what you should expect to see becausethe whole circuit is live at mains potential!To make measurements on a SMPS you need to either use a high-voltage differential probe or isolate the whole circuit from the mains using an isolation transformer.

author: srb1954
author_rank: Super Contributor
timestamp: January 20, 2021, 01:07:23 am
content: Quote from: S. Petrukhin on January 20, 2021, 12:59:32 amDon't connect the ground of the scope probe anywhere on the primary (mains) side of the SMPS unless you have unit under test powered from an isolation transformer.Connecting a scope probe ground to a non-isolated circuit will result lots of sparks, a burnt out scope probe and possibly a damaged scope.

author: ant17
author_rank: Regular Contributor
timestamp: January 20, 2021, 01:26:06 am
content: ok guys thank you for your reply which is most accurate way of measuring the little smd components and transformers on the primary side with you scope thanks
Measuring an IC  - Page 1
Forum section: electronics / repair

author: hpibmx
author_rank: Regular Contributor
timestamp: April 27, 2020, 11:02:22 am
content: Hi everyone,May I know if there is anyway to measure an ic which is taken from a donor board?I'm actually technician for iphone and ipad, and there are times i'm taking a chip from my donor board.So I sometimes when I take the chip works sometimes not! I use diode mode on my multi meter to measure pins.Does diode measurement work on ics? how can I tell if it's good or bad before putting them on the board?Thank you.

author: gojunnyo
author_rank: Contributor
timestamp: April 27, 2020, 11:33:07 am
content: Any chance of having the specific part number or looking for its datasheet? It might help you. There is a way though but not entirely the general consensus, locate the VCC and GND pins through the help of datasheet, and use your multimeter in diode mode to test see if there are any shorts between the two pins.

author: hpibmx
author_rank: Regular Contributor
timestamp: April 27, 2020, 12:07:21 pm
content: There is no way to have access to data-sheets, but with tool I have I can have VCC and GND pins.Thanks for your adviceCheers
Meccatronicore UV curing machine model MTC BB-CURE MINI- - Page 1
Forum section: electronics / repair

author: FIXITNOW2003
author_rank: Regular Contributor
timestamp: March 03, 2022, 07:17:52 am
content: This has been found in a cupboard at work it powers up and seems to go through the motions , but the UV led's do not light and the heater does not heat up has anyone seen one off these before or have any service infobbcure_midi user guide.pdf(2781.52 kB - downloaded 51 times.)its rivet together so will drill them out and add more picture's as i progress cheers Vince

author: coppercone2
author_rank: Super Contributor
timestamp: March 03, 2022, 08:58:19 am
content: well, I am not sure how to fix it, but you can fix the rivets with thishttps://www.amazon.com/Setter-Professional-Threaded-Interchangeable-Mandrels/dp/B07BF8FZ2Z/ref=asc_df_B07BF8FZ2Z/?tag=hyprod-20&linkCode=df0&hvadid=241944166267&hvpos=&hvnetw=g&hvrand=9009624717920775127&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004188&hvtargid=pla-447491999891&psc=1

author: FIXITNOW2003
author_rank: Regular Contributor
timestamp: March 03, 2022, 01:10:49 pm
content: Quote from: coppercone2 on March 03, 2022, 08:58:19 amgot one off them so yes if i can fix i may well use these to reassemble

author: SeanB
author_rank: Super Contributor
timestamp: March 03, 2022, 05:32:38 pm
content: Going to bet there is a SMPS inside there that has dead capacitors on primary side and secondary side, which probably has a 12V or 24V output, along with a small separate 5V supply that still works. Then there will be some relays driving the lights, and the heater. So likely all the Chongx capacitors are dead, and likely the relays are either dry jointed or have open contacts.

author: FIXITNOW2003
author_rank: Regular Contributor
timestamp: March 04, 2022, 07:20:01 am
content: Pulled the psu its a 24v 15A only model S-360-24 will load it up on the bench to test then see if i can find any data/circuit

author: FIXITNOW2003
author_rank: Regular Contributor
timestamp: March 05, 2022, 06:22:34 am
content: circuit for psu found else where on websompom_s-360-24_24v-15a_psu-modul_with_ka7500b_sch.pdf(220.44 kB - downloaded 129 times.)

author: FIXITNOW2003
author_rank: Regular Contributor
timestamp: March 05, 2022, 06:43:39 am
content: have loaded psu up with best load i can with 4 x 8R 95 w resistors in parallelie 2 ohms across 24 voltsso 12 amps 288wpsu works ok at this rating so i guess its going to do what's needed off it
Mechanical Repair - Page 1
Forum section: electronics / repair

author: metrologist
author_rank: Super Contributor
timestamp: May 09, 2022, 05:10:04 am
content: My kitchen faucet handle started coming loose and would no longer tighten. It seems to have lost some metal.To fix, I install one hole, with threads.And then I mix JB weld, install a shouldered hex socket screw, and mill one side flat.That was all plan B. Plan A would never have worked.
MEDION Akoya E2228T DC in jack - Page 1
Forum section: electronics / repair

author: jc101
author_rank: Frequent Contributor
timestamp: January 10, 2020, 10:18:16 am
content: I am trying to find a replacement DC power jack for a Median Akoya E2228T netbook (model no MD 62250), a trawl of DigiKey and Mouser hasn't turned up a suitable match.It's small, 6 x 10 x 3 mm (approx, some of it is missing) and looks to have a switch inside too. The centre pin is circular, with some of it still in the PCB hole I think.Medion will only sell the whole CPU board (£500) when all I need is the DC jack.Anyone know what this DC jack is?
Megger BM400 series insulation testers - service information - Page 1
Forum section: electronics / repair

author: WaveyDipole
author_rank: Frequent Contributor
timestamp: May 19, 2021, 09:47:52 am
content: Does anyone have a schematic or service information for the Megger BM400 series of insulation testers?It seems that officially the information is available only to "authorised repairers" which is why I am not having much success on Google.

author: WaveyDipole
author_rank: Frequent Contributor
timestamp: May 20, 2021, 05:30:57 pm
content: I now have the information I require. Thanks.
Megger Foster OTS 60PB Dielectric test set??? - Page 1
Forum section: electronics / repair

author: Mad Axeman
author_rank: Contributor
timestamp: February 11, 2023, 08:01:08 pm
content: Can anyone point me in the right direction for a circuit diagtam for a Megger Foster OTS 60PB oil dielectric breakdown test set? Ours has failed. it will go through its initialisation with the pause and stire but as soon as it tries its first 1kV test the unit resets back to its boot screen. On a self test it'll pass up to the point of doing its first test, again only at 1kV, and resets. I can hear a relay clicking in just before it resets. If anyone has a circuit diagram or knows where I can find one it would be great.Thanks.
Megger MIT230 Mosfet details? - Page 1
Forum section: electronics / repair

author: Mad Axeman
author_rank: Contributor
timestamp: February 13, 2023, 01:07:08 pm
content: Hi FolksI've got a Megger MIT230 1kV insulation tester apart in front of me. At some time it's decided to take up drinking. I've given it a good clean and it's fired up into life but it's got problems. The res range seems fine but all IR ranges are showing 15 - 16M with probes open. After a good check with an eye glass (yes, I'm an old fart who's eyesight isn't what it should be) I've found a mosfet with a lump! It doesn't look well at all. Unfortunately I can't read the full number on it due to the 'lump'. All I can make out is FQT13N??L. Anyone out there have a schematic and can tell me what mosfet it is? Not sure if it's the cause of the problem but it can't be helping. Sorry about the picture quality. Phones are not meant to take close up shots

author: jonpaul
author_rank: Super Contributor
timestamp: February 13, 2023, 02:41:00 pm
content: We have bought several UK made professional insulation testers at flea markets for €5..20!Link to the original manufacturer and model, no idea who or what his is.Pix are fine, but I Suggest that you trace out PCB for schematicBlown up FET or transistors will usually require many other damaged parts to be found and replaced, often the driver IC.I would suspect the root cause is breakdown in the poorly designed pot core HV transformer or HV caps, diodes.Bon chanceJon

author: fzabkar
author_rank: Super Contributor
timestamp: February 13, 2023, 06:29:35 pm
content: https://search.datasheetcatalog.net/key/FQT13N

author: factory
author_rank: Super Contributor
timestamp: February 13, 2023, 06:33:47 pm
content: Quote from: jonpaul on February 13, 2023, 02:41:00 pmI doubt you can blame the design for the corrosion on the PCB, the OP mentioned it had "taken up drinking", either it's got wet from drink/water, or maybe it's another victim of leaking batteries, pretty hard to tell from the picture.The FET is probably FQT13N06L, as used in the MIT320 mentioned here:https://www.vintage-radio.net/forum/showthread.php?t=112071David

author: Mad Axeman
author_rank: Contributor
timestamp: February 13, 2023, 07:59:05 pm
content: Thanks for the replies. I'm not sure what had been tipped into the unit. It was a bit sticky so probably some type of fizzy drink. A toothbrush and isopropylene alcohol (okay, can't spell it!) has sorted the mess out. It is a FQT13N06L. A few hours after my post I got thinking (dangerous thing to do!) and thought 'I've got a working one in my van' so went out, pulled it apart and got the number. Why I didn't think of that earlier I just don't know. Anyway, 5 of them (minimum order) are now on order from RS. The only ones RS had in stock are in France so not due for a couple of days. I'll let you all know how I get on.I have to admit, considering it's made by Megger the switch quality is pretty poor.
Megger mit300 series - Page 1
Forum section: electronics / repair

author: Graybear
author_rank: Newbie
timestamp: January 23, 2020, 07:23:13 pm
content: Hi have a megger mit310 showing E31 error code.Megger says it requires an internal reset at great expense plus vat.Normally repair lots of test equipment but stuck on this one as no info available on net.A service manual or copy of would be a start.Many thanks in advance.
Megger MIT320 Service Manual - Page 1
Forum section: electronics / repair

author: ixus2600
author_rank: Newbie
timestamp: August 06, 2020, 11:02:22 pm
content: Hi,Does anybody have a copy of the service manual for the Megger MIT320?I have a faulty one and really need it to find out the values of a couple of SMD components so that I can replace them.
Megger PAT 420 Error 83 fault - Page 1
Forum section: electronics / repair

author: Mad Axeman
author_rank: Contributor
timestamp: January 08, 2024, 07:39:26 pm
content: As it's quiet in work I've been looking through all the faulty equipment that we have. There's a Megger PAT 420 PAT Tester (Ok, that should be ISITEE but it just doesn't sound right) that has a fault. When you power it up it goes through it's self check. The little spinning wheel symbol comes up on the screen then it stops with the following message :-ERROR 83 - INPL_V failed.You can't get past this no matter what you press. I can't find any reference to this anywhere. Anyone got some tips?
Megger/AVO BM223 IR & Continuity Tester - Page 1
Forum section: electronics / repair

author: TaylorD93
author_rank: Regular Contributor
timestamp: April 07, 2023, 09:24:29 pm
content: Hi Everyone,Bit of a shot in the dark, my relatively old BM223 Insulation Resistance and Continuity tester has failed. It works on the 1kV, 500V and 250V IR ranges, but when i do a continuity test, there is no output current, it always reads >99.9 Ohms.Ive contacted Megger but as its quite an old model now they dont want to know as its obsolete.Is anyone here familiar with this model? any documentation for it?Ive opened it up and have done a quick visual inspection, i cannot see anything blown etc, but im at a standstill with it.Any help is greatly appreciated, Thanks in advance,Taylor

author: George Edmonds
author_rank: Frequent Contributor
timestamp: April 07, 2023, 10:05:35 pm
content: HiI don’t know if this will help. Megger had a bad habit of using very thin sections of PCB track as one time fuses, they are very difficult to spot when open/blown.G Edmonds
Memory module for Fluke 196C - Page 1
Forum section: electronics / repair

author: 1kostik1976
author_rank: Contributor
timestamp: February 15, 2017, 05:44:42 am
content: Hello everybody.someone has a memory module for Fluke 196C?probably in my oscilloscope has broken the memory module ...

author: Assafl
author_rank: Frequent Contributor
timestamp: February 15, 2017, 02:31:18 pm
content: From the service manual:Item: A201FLASH/SRAM MODULE 1M x 16 (OLD) Order Number: 4022 246 19431FLASH/SRAM MODULE 512k x 16 (NEW) Order Number: 4022 246 19841Nothing at Fluke is simple. The numbers above (AFAIK) can only be ordered by the service department. They'll tell you the number is incorrect.So you have to tell Fluke it is from the service manual and that they have to find the other part number (the part number).That is assuming it is available. Also - I am not entirely sure you can buy is since they have to upload the mask ROM and firmware to it.

author: 1kostik1976
author_rank: Contributor
timestamp: February 15, 2017, 04:16:23 pm
content: parts 4022 246 19841

author: ramator
author_rank: Newbie
timestamp: February 27, 2019, 08:40:56 am
content: I saw the post about fluke 196. I have a fluke 199c sopemeter with the same type of memory that does not start, I think it may be a problem similar to yours. It can not be up-grade because it does not communicate through the serial port, it may not run the mask software. Please tell me if you have solved this defect and how.Thank you

author: 1kostik1976
author_rank: Contributor
timestamp: March 31, 2019, 06:09:30 am
content: NOTE: This message has been deleted by the forum moderator Simon for being against the forum rules and/or at the discretion of the moderator as being in the best interests of the forum community and the nature of the thread.If you believe this to be in error, please contact the moderator involved.An optional additional explanation is:

author: noidea
author_rank: Unknown
timestamp: April 01, 2019, 01:45:13 pm
content: I used google translate on the post in Russian before it was deleted and it was still in my history. The translation was:"I continue to search for a module ... on this module there is poor soldering quality. Try to solder the chips."

author: lostking2008
author_rank: Contributor
timestamp: August 13, 2020, 01:57:32 pm
content: Hi There, I need a memory module for Fluke 199C, but it has been discontinued by Fluke back in 2017. Unfortunately, the service manual doesn't come with the circuit drawing of the Flash/SRAM module (80 contacts in two rows, 0.8mm pitch) itself. Does anyone have a schematic drawing of the memory module?Thanks,Ken
Meratronik V543 Voltmeter  - Page 1
Forum section: electronics / repair

author: mldevw
author_rank: Contributor
timestamp: February 26, 2021, 09:03:02 pm
content: Hi,on the plus side I just aquired an old nixie voltmeter from Meratronik with good documentation.Now I figured it has a offset of about 160 mV in the 10 V measurment range,but I can't calibrate it, as the total potentiometer travel only does a 10 mV change.I also tried calibrating the 1V range there is only a 5 mV difference but changing the potentiometer does absolutely nothing there.(Yes, I made sure to warm it up and turn the right potentiometers, according to documentation).Anyone had this fault before?What point can I start analysing the issue?Thanks in advance.

author: doktor pyta
author_rank: Frequent Contributor
timestamp: February 27, 2021, 12:13:07 am
content: Please tell us readings for shorted input. Go through all DCV ranges.We must distinguish zero error (offset) from gain error (slope).10-turn potentiometer on the front panel 'zero' can have dirty wiper contact.You can test it using ohmmeter.You can do simple test - remove DC amplifier board and short it's output to ground (LO).You should get stable zero reading unless there is a fault in AD converter board.P.S. I have a calibrated V543 but in other location.If You won't solve the problem I can measure some voltages in the circuit for You - to have the reference.P.S.2. Manual is there:https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjJmYiT_4jvAhVlkIsKHQjKCS0QFjAAegQIAhAD&url=http%3A%2F%2Fbee.mif.pg.gda.pl%2Fciasteczkowypotwor%2FPolskie%2520mierniki%2FV543_2.pdf&usg=AOvVaw0wWdLV4loh_KVyHdZhIFXc

author: bob91343
author_rank: Super Contributor
timestamp: February 27, 2021, 02:07:23 am
content: A circuit diagram certainly would help.

author: coromonadalix
author_rank: Super Contributor
timestamp: February 27, 2021, 03:19:19 am
content: what i've found, a djvu file converted to pdffrom :http://multimetry.tzok.eu/multimetr.php?typ=V543

author: bob91343
author_rank: Super Contributor
timestamp: February 27, 2021, 06:16:47 am
content: Always check the power supply first. Voltages and ripple.

author: mldevw
author_rank: Contributor
timestamp: March 01, 2021, 05:39:48 am
content: Hello,unfortuanetly I currently can't work on it, but I figured it is a slope error.I will try to take out the DC amp board to check if there is a fault on the AD converter;My zero potentiometer is fine.Thanks a lot.
Mercury 650.682 Bench Top Power Supply 30V 10A Single Variable Output LAB PSU - Page 1
Forum section: electronics / repair

author: ME
author_rank: Frequent Contributor
timestamp: June 19, 2025, 03:29:07 pm
content: I have a psu the same as in the title, It goes into current limiting at 2a with controls at max, Does anyone know where i can get a schematic so i can fix it see pic?,thanks.

author: tunk
author_rank: Super Contributor
timestamp: June 19, 2025, 03:40:12 pm
content: Open it and post some photos - maybe someone cansee if it's a rebadged version of some other PSU?

author: G0HZU
author_rank: Super Contributor
timestamp: June 19, 2025, 03:57:26 pm
content: It looks fairly similar to my old Skytronic 650.682 PSU. If so there may be a schematic here if you register for it:https://maker.pro/forums/threads/my-busted-psu.297084/I don't use this old PSU very often. It was always a bit scary to use because of the clicky relays inside and the crude voltage controls. However, it was always reliable whenever I did use it.If you do get the full sized schematic for this PSU I'd be interested in a copy of it
Merz PMKD 2500-appliance tester -display malfunctions - Page 1
Forum section: electronics / repair

author: Nix2
author_rank: Newbie
timestamp: October 12, 2020, 02:12:51 pm
content: Hello !I have 2 identical appliance (safety) testers PCE-MERZ PMKD 2500, one of them has a problem with displaying information. The tester itself works and measures correctly, but (ONLY when the ENG language is set in the menu) the individual lines of text on the display overlap, which makes it unreadable. When the language is set to DE, the display works completely correctly.The defective tester has older software (ver. 00103) and this is probably the reason ? I wanted to upgrade the firmware myself, but there is no way to download the new firmware and the manufacturer ( PCE-Merz) offers only a paid calibration service, which can be combined with uploading the new firmware. I attach photos.The tester's manual describes in detail how to upgrade the firmware, but unfortunately I can't find it anywhere unless it is possible to download a newer firmware from a second tester ?Regards!Nix

author: coromonadalix
author_rank: Super Contributor
timestamp: October 12, 2020, 02:19:05 pm
content: the firmware should reside in an eeprom / rom chip, it should/could be possible to dump it and reprogram another chip ?? show us some inside photosIt seems a bad display translation, normally in the code / FW you have the display characters positions and fonts associated with each language(s) ... since the words doesn't have the same character lenght
Metal Conduit and inline plugs - Page 1
Forum section: electronics / repair

author: time27
author_rank: Contributor
timestamp: July 17, 2022, 10:42:29 pm
content: I am looking for a MC (metal conduit ) supplier OD 7.5mmANDinline 7 pin type of DIN or STC canon plug for MC cableBackground: purchased from Ditron online sensors they work fine but was unable to get components to install inline plugs.Can anyone help by identifying the plug or MC cable supplier.//Nick
Metcal hand-piece compatability - Page 1
Forum section: electronics / repair

author: mwbajor
author_rank: Newbie
timestamp: September 25, 2024, 04:37:41 pm
content: I have two Metcal power supplies; a new MX-5200 and also the older MX-500p-11.The MX-500p-11 with a MX-H1-AV and STTC-144 tip doesn't get hot at all. I've tried all the obvious stuff (checked the electrolytics) as well as comparing with some of the measurements of a known good unit (http://colinoflynn.com/wp-content/uploads/2012/05/MX-500P-11.pdf). I had to replace U4 and the measurements look good now, but the tip is still cold. The tip and hand-piece is known to be good because it works fine with the MX-5200.I've seen that some of the hand-pieces, at least the MX-RM3E has an inductor and capacitor in the handle. I haven't taken apart the MX-H1-AV hand-piece yet but I can't find any info on there being an inductor and capacitor in it.So my question is: are MX-H1-AV hand-pieces compatible with the older MX-500p-11 power supplies or do I need to use the older MX-RM3E hand-piece?
Metcal MFR-1100 / MFR-PS1100 - erroneous "tip open circuit" trips - Page 1
Forum section: electronics / repair

author: philpem
author_rank: Frequent Contributor
timestamp: November 30, 2019, 04:18:36 pm
content: Hi,I've got a Metcal MFR-1100 power supply with an extremely annoying problem. It randomly trips out with a red error light (tip is open circuit).Cleaning the tip on the brass sponge or catching it on the inside of the stand is just about guaranteed to trip it, but it happens during normal soldering too.I've replaced the tip and handpiece (suspecting a bad cable or tip connector), but I'm still having the same issue. I'm starting to suspect something's aged in the base station and the tip-open detection circuit has become very twitchy.Has anyone repaired an MFR power supply with this fault?Cheers,Phil.
Metcal MX-500 repair - Page 1
Forum section: electronics / repair

author: oilburner
author_rank: Contributor
timestamp: April 30, 2020, 02:15:05 pm
content: HiI am working on a sick MX-500 soldering iron. Green light is on and will switch to yellow if I select the other open input channel. Tip and wire are fine, works on another unit I have.Going through the super detailed MX-500P-11.pdf tech document (thanks who ever wrote this!). Good 26V, 53V, 18V, and 12V power supplies. The problem seems to be in U1 the inverter for the 13.56 Mhz osc. Only getting about 2 volts on pin 14 of U1. Should I lift up R2 and power the IC with 5Vbench supply to see if the problem is U1 or the zener D2?Thanks!

author: oPossum
author_rank: Super Contributor
timestamp: April 30, 2020, 03:51:52 pm
content: Check the voltage on the other side of R2. If that looks good check R2 and D2 out of circuit.

author: oilburner
author_rank: Contributor
timestamp: May 06, 2020, 12:55:18 am
content: Thanks oPossum, the other side of R2 was not good, made some more measurements:
Metcal MX-5000 repaired for not heating up - Page 1
Forum section: electronics / repair

author: gregpl
author_rank: Newbie
timestamp: October 21, 2017, 07:41:33 pm
content: Didn't see this posted anywhere so thought it might help someone one day.Was using my metcal mx-5000 and turned it off to replace tip then it wouldn'theat up anymore. Everything else would work. When I picked up the iron to usethe bar graph did nothing and of course would not heat up.Took it apart and found SMD diode D12 bad. SK16 -https://media.digikey.com/pdf/Data%20Sheets/Diodes%20PDFs/SK12-SK16.pdfReplaced the diode and its working again. Almost bought a new one. Glad I took it apart.

author: Zucca
author_rank: Unknown
timestamp: October 23, 2017, 08:40:59 am
content: Thanksgregpl, great job!

author: memed
author_rank: Contributor
timestamp: November 07, 2017, 08:03:21 am
content: Hi.I have same issue with my MX-5200.Did Q4 MOSFET was heating up that time?Diode D12 was shorted?Thanks

author: gregpl
author_rank: Newbie
timestamp: November 07, 2017, 02:15:17 pm
content: I used an IR camera and could see D12 getting hot. It read shorted. Replaced it and its working now.I didn't check any voltages or anything else. Just used the IR to see if anything was getting hot.

author: helpmerepair777
author_rank: Newbie
timestamp: November 12, 2024, 01:30:17 am
content: Hi , im new around here ! ehhei was going to check this linkhttps://media.digikey.com/pdf/Data%20Sheets/Diodes%20PDFs/SK12-SK16.pdfEDIT : the link is expiredits for the D12 diode , but the link is expired , and I wanted to know what SK12 diode to choose , im getting a used metcal mx-5000 and ordering come stuff from mouser so I told myself , why not get some spare parts , im gonna order thursday so let me know if you have any other spec for this SK12 diodeTHANKS ALOT !
Metcal MX-5200 open error repair - Page 1
Forum section: electronics / repair

author: elemenoh
author_rank: Contributor
timestamp: July 07, 2023, 12:28:22 am
content: I took a gamble on a cheap ($220) Metcal MX-5200 soldering station on eBay that was listed as only tested for power-on. The unit did power on but gave an open error for the left channel. Something was rattling inside so I opened it up and found two of the LCD screws and nuts were rolling around, seemingly from someone trying to open the unit previously. Uh-oh.Factory resetting didn't help. I dumped the ROM since I saw another post here saying the ROMs can become corrupted. It seemed fine. In case it's helpful to others, see the attachment for a dump of 1.3.6.Next I figured I'd try swap testing things between the two channels. I started with the relays. After swapping the left and right relays with each other, both channels started working fine! It now switches between channels and runs them both at the same time without issue. I didn't notice any solder issues prior to the swap, but perhaps there was a cold joint. Is there any other reason why swapping them would help?The only problem left is a broken power switch. It seems to be a Cherry RR DPST 16A 125V part number ‎RR812C1000-116 which is on DigiKey.

author: Jude86
author_rank: Newbie
timestamp: January 27, 2025, 08:58:43 pm
content: Hi all,I have one issue with My Metcal MX5000 after i solder one wire under tension 230V .The ledcon was burned together with heating element, i replaced components and the OPEN error is display.I checked tension 48V 5v and 24 v and it is correct also i checked the components from the board and still correct value.I replaced the PIC with another one and ai flashed same firmware and nothing happened. I used another firmware from this group and also the issue still there OPEN Error.What i observed the LM 2574 not receive from the command from PIC not coming and this power not started. I replaced the LM it and same issue.Any one solve this issue?Thank you!

author: scrofula
author_rank: Contributor
timestamp: March 15, 2025, 07:26:59 pm
content: my friend. at the very bottom of the board there is an element wrapped in black film. check it. often from its breakage (burnout in your case) the station does not see the handle.

author: testpoint1
author_rank: Frequent Contributor
timestamp: March 16, 2025, 09:21:46 pm
content: Quote from: elemenoh on July 07, 2023, 12:28:22 amthe relay life are end, change both, someone sell it within ebay:https://www.ebay.com/itm/156701830267
Metcal Mx500 II Stations - Page 1
Forum section: electronics / repair

author: tal35
author_rank: Newbie
timestamp: October 27, 2020, 09:11:34 pm
content: I got several of these at an auction, same as what I use, I plug my good wand and good tip in, light stays green, but the iron never warms. I have not checked to see if I have a 13Mhz signal or not yet. All8 of them have the same problem, either output , and yes I did check my wand and tip before and after on my MX500 II. Any thoughts?
Metcal MX500P (non legacy) - Page 1
Forum section: electronics / repair

author: Gibson486
author_rank: Frequent Contributor
timestamp: December 28, 2020, 08:46:57 pm
content: Maybe this is not the right forum?I bought a Metcal MX500P to replace my PS900. I finally got around to plugging it in today and it gives me an error that says GND Fault. I looked it up and it looks like maybe my outlet may not be grounded correctly. This particular unit says, in the manual, that if your outlet is not grounded, it will just shutdown (that was not the case with the PS900). Seeing as how I live in a 120 year old house, I would not really be surprised that the previous owners put a grounded outlet in a non grounded line (that would actually not be the worst thing they did in this house, but those stories are for another day). Before I go crazy and attempts to replace the line (that is gonna be a pain in the a**!), do you think it would be feasible to replace the outlet with a GFCI outlet? Or would that not fix the issue? I tried this on an outlet that I actually installed myself, and the unit itself does work, so I am sure at this point that it is indeed the outlet.

author: BurningTantalum
author_rank: Frequent Contributor
timestamp: December 30, 2020, 02:47:33 am
content: What is a 'non-legacy' MX500P?As far as I know the MX500P does not have any kind of display, and the mains feeds directly into a transformer (via a couple of chokes and X & Y caps.BT

author: tooki
author_rank: Super Contributor
timestamp: December 30, 2020, 04:41:29 pm
content: Quote from: Gibson486 on December 28, 2020, 08:46:57 pmA GFCI wouldn’t fix the issue because it doesn’t create a ground. It simply provides much-needed safety on an ungrounded circuit.

author: Gibson486
author_rank: Frequent Contributor
timestamp: January 02, 2021, 03:45:14 pm
content: Post deleted

author: Gibson486
author_rank: Frequent Contributor
timestamp: January 02, 2021, 03:46:21 pm
content: Quote from: BurningTantalum on December 30, 2020, 02:47:33 amhttp://www.okinternational.com/hand-soldering-systems/id-MX-500P/MX-500P_Power_Supply
Metcal MX500P-11 acting strangely - Page 1
Forum section: electronics / repair

author: DeepLink
author_rank: Regular Contributor
timestamp: November 21, 2022, 02:22:12 pm
content: My good old Metcal MX500P-11 station is starting to misbehaveWhen I turn it on I get the green lightIf I remove the tip it turns amberAfter tip reinstall and a power cycle it turns green againSo far so goodBut it only heats the tip for a few minutes (still green light)First I suspected the tip, and changed to another one (which was brand new) and it started heating upBut all my old tips are dead, it seems that new tips are workingAny suggestions?Need to find a suitable screwdriver to take it apart

author: thm_w
author_rank: Super Contributor
timestamp: November 21, 2022, 11:00:43 pm
content: Did you measure the resistance of the tips, to see if they've gone open circuit?So the new tip works for a long time now?
METCAL MX500P Schematic - Page 1
Forum section: electronics / repair

author: roger_ELPTX
author_rank: Newbie
timestamp: February 28, 2025, 04:54:37 am
content: Hello everyone. I am attempting to repair a Metcal I recently purchased on eBay.I have an RFG-30 that stopped working so I bought the 500 because of the schematic. It was the cheapest one I could find and wasnt expecting it to work. Im in it for the journey and the education.Anyhoo.... Symptoms of the mX500. At first start up with new iron and tip, got a green light. Turns yellow when I remove the tip or flip the selector switch. Tested both irons, got two green lights. neither tip heated.Opened the unit. Did a visual inspection, found R3 was burned, replaced, but it tested fine when removed. R26 was discolored, replaced, tested fine. No other visual indicators of fails found.Tested fuse= closed, okTF pri=124vac; sec=42vac; tap=21vacBR1=42vac; 57vdcFollowing pg2 measuring good working units:1.) c2=28.7vdc; c6=57.6vdc;2.) u8p3=17.7vdc; u7p14=11.6vdc;3.) u4p4=323mvdc; u4p5=45.6mvdc;4.) u4p5=26.38vdc5.) c8=5.7vdc; c3=6.7vdc; c16=0vdcU4 p1=50.1vdc; p2=6.35vdc; p3;0; p4;322mvdc; p5=46mvdcthought it was U4 but p4 in fault mode was correct.As I was checking I noticed the alum heatsink plate got really hot. got to 185F. Not sure if that is normal. about 10 minutes time. TS1=closedI found a bad Q4, replaced it, shorted again.source gate and drain all shorted to ground (tested in circuit).Based on the schem, source is already grounded and gate is probably reading as a short due to the inductor L10 (need to disconnect to test). Still chasing drain. Checking caps downstream for short to ground.I found something odd with the schem and my pcb. Schem says C7 should be soldered directly to U4, pin 1 & 3. But I found a C7 spot on my board with a cap soldered, but the schem does not show a C7 on the board. It only shows 2 dots where C7 is installed. There is also a C7 soldered to the back of the board @ U4. So I have an extra cap in the circuit. How is that going to affect the circuit?Q3 calls for a 109N5 but has a 106N5. Read on one of the previous forums that IRF510 could work, but had to short out some components??I would appreciate some clarification if someone has it.Is there anything else I should check?Getting a Hantek scope this weekend. Look forward to playing with that.---Roger
Metcal PS5000, trying to repair (Need info on C43) - Page 1
Forum section: electronics / repair

author: dfnr2
author_rank: Regular Contributor
timestamp: August 04, 2022, 08:19:59 pm
content: Hello,I picked up a nonworking Metcal PS5000 on Ebay. It was advertised as "Untested, For Parts or Repair". I opened it up and found the two mains fuses blown, and also Q3 was dead, shorted. I couldn't find any other obviously bad semiconductors so I replaced the fuses and Q3, hoping to scope it out from there. Right away on powering up, There were sparks and smoke, and C34, the cap close behind Q3, blew up, shorting out, and blowing the mains fuses again. Q3 and other semiconductors still look OK, and I'm wondering if a borderline C34 might have been the issue.I can't find online schematics, so I'm wondering if anyone here might have access to a unit to be able to tell me the type and value for C34.Many thanks,Dave

author: thm_w
author_rank: Super Contributor
timestamp: August 04, 2022, 09:13:05 pm
content: Photo?What part did you replace Q3 with, identical?https://www.eevblog.com/forum/reviews/metcal-mx-ps5000-issue/https://andydoz.blogspot.com/2017/10/metcal-mx-ps5000-repair.html

author: dfnr2
author_rank: Regular Contributor
timestamp: August 04, 2022, 09:58:53 pm
content: Q3 is a FQPF13N50CF MOSFET. I replaced it with the same.

author: dfnr2
author_rank: Regular Contributor
timestamp: August 05, 2022, 04:36:45 pm
content: I made a mistake, it's C43, not C34.It turns out there was writing on the side of the cap that wasn't blown out. It was just too faint to see without strong lighting and a magnifier (or a polarized lense).It's thick and blue, suggesting a safety cap. The markings are B 332K 1KV.I ordered a couple of 3300pf 10% 1KV safety caps, TDK series CK45, which seems to be a match, and will see if that works. All the big transistors and diodes seem to be OK still, including the just-replaced Q3.Perhaps C43 failed and blew the fuse before outright exploding, and once I replaced the fuses, it exploded.I am hoping to get to the point where it's not blowing fuses, so I can actually start troubleshooting.

author: dfnr2
author_rank: Regular Contributor
timestamp: August 08, 2022, 03:09:34 am
content: Installed the replacement and fuses, and now there's no explosion, but no 24V or 48V out. Now, I can start to map out the circuit and start debugging.Pin 8 (RAMP) of the FAN4800 PWM controller is discolored, and the PWM controller would be a good place to start investigating, although that pin shouldn't be at risk except in the case of a catastrophic chip failure.
METCAL Repair - Page 1
Forum section: electronics / repair

author: roger_ELPTX
author_rank: Newbie
timestamp: March 15, 2025, 02:56:55 am
content: Looking for someone to repair my METCAL MX500-P.I live in El Paso TX. FAR west Texas.Can someone provide me with a quote?

author: Smokey
author_rank: Super Contributor
timestamp: March 15, 2025, 05:25:47 am
content: cheaper than $88?https://www.ebay.com/itm/335857428398

author: roger_ELPTX
author_rank: Newbie
timestamp: March 27, 2025, 04:04:26 pm
content: Bought it. It works. Still have 2 units that need repair.
Metcal solder station parts - Page 1
Forum section: electronics / repair

author: Evelhorn
author_rank: Newbie
timestamp: August 06, 2023, 10:08:07 pm
content: Can anyone tell me where to find parts for Metcal stations. The port where the hand unit plugs in has some of the insulator missing. I have searched high and low to no avail. SP200 station.

author: Shock
author_rank: Super Contributor
timestamp: August 08, 2023, 02:31:45 am
content: The RF socket? Show a few images of it on the PCB from both sides or if it's tethered from behind, as well as the front. I doubt Metcal supplies components to resolder into their stations and besides that it would likely be cheaper to get a good quality generic part (if possible).

author: Chris Jones
author_rank: Regular Contributor
timestamp: August 08, 2023, 12:02:12 pm
content: I think it's an F-connector - Does anyone agree with that?

author: artag
author_rank: Super Contributor
timestamp: August 08, 2023, 12:12:08 pm
content: It is on the MX-500. On other stations it's a DIN and a mini-DIN, so it depends on which one you have. Not sure about the SP-200.
Metcal SP200 tips pinout - Page 1
Forum section: electronics / repair

author: ivi_yak
author_rank: Regular Contributor
timestamp: March 28, 2025, 02:34:27 pm
content: Hi,I have disassembled the handle to replace the cable. The question is, what is the cartridge pinout?Could some happy owner measure?Thanks!

author: ivi_yak
author_rank: Regular Contributor
timestamp: March 31, 2025, 01:37:28 pm
content: Updated!I tested it works both ways. The tip orientation was added only to match with the two-pin slot inside the handle, no actual electrical background there, just mechanical tuning
Metcal Stand Crack Repair?  - Page 1
Forum section: electronics / repair

author: cray54
author_rank: Newbie
timestamp: October 28, 2020, 04:43:02 pm
content: I received a used Metcal stand that was crushed during shipping. Any suggestions for an ideal adhesive to use for repair?I was figuring epoxy, but the high-temperature nature of it made me figure I should ask first.Thank you, Chris

author: Haenk
author_rank: Super Contributor
timestamp: October 28, 2020, 06:25:37 pm
content: I'd try epoxy, you usually don't heat those areas a lot, epoxy should be able to handle the 50-60 degrees.

author: Gyro
author_rank: Super Contributor
timestamp: October 29, 2020, 11:35:01 am
content: Go with standard slow setting epoxy too, the quick setting ones aren't as strong.

author: chrisl
author_rank: Regular Contributor
timestamp: October 30, 2020, 02:16:20 am
content: I would J-B weld it. It works on automotive.

author: cray54
author_rank: Newbie
timestamp: February 10, 2021, 06:19:08 am
content: I was going to use epoxy as others suggested, but I received a reply from the manufacturer around the same time as replies (I had asked them prior to posting but hadn't heard back yet). The Metcal stand is made of phenolic molding compound. It would ideally be repaired with a high temperature cyanoacrylate. Since the areas that might be exposed to high temperatures were not damaged and it was just the rear of the stand that needed repair, I chose to use standard cyanoacrylate at a much lower price. I've been using it now for several months and everything is working as expected.Thank you, Chris
Metcal tip luke-warm instead of hot - Page 1
Forum section: electronics / repair

author: benj38
author_rank: Frequent Contributor
timestamp: April 06, 2023, 02:51:28 pm
content: Hi guys,I have a Metcal wide (22mm) flat blade tip that is not heating up correctly. it only gets up to a relatively low temperature, just below the solder melting point. The MX-5200 workstation power bar-graph always reads about 1-2 bars of power with this tip (instead of the regular ramp-up of substantial power draw on startup, settling after about 5-10 seconds to 1-2 bars).Other tips I have work fine, so it is not the station or the handle.Is this a normal failure mode?Is there anything one can do to revive the tip (it is quite expensive)Thanks in advance,

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 06, 2023, 02:58:59 pm
content: Something I've seen a few times is blobs of solder stuck in the coax plug at the end of tip causing shorts.If not, it's probably shorted turns in the heater - sometimes temporarily recoverable with a sharp tap on the side.It used to be the case that Metcal would replace any tip whose heater failed while the tip plating was still good - looks like this may still be the case - warranty is stated as "heater: lifetime of plating"https://www.metcal.com/wp-content/uploads/2021/02/Metcal-Warranty-Chart-062021.pdf

author: benj38
author_rank: Frequent Contributor
timestamp: April 08, 2023, 08:24:59 am
content: @mikeselectricstuff, thanks for the tips!Unfortunately, a sharp tap did not work, but it is good to know. The plug is also nice and clean, so I think it is a hopeless.I will look into the warranty option.
Metex M-3850 high battery current draw repair (+teardown) - Page 1
Forum section: electronics / repair

author: hanakp
author_rank: Regular Contributor
timestamp: November 01, 2024, 04:00:46 pm
content: Korean-made Metex multimeters used to be quite popular in my country during 1990s and 2000s, because they had slick design and advanced features like autoranging for much lower price than "reputable" producers. Two weeks ago, I got an unused Metex M-3850 made in 1994, basically it sat in a warehouse for the last 30 years. It used to be top model at the time, you cancheck out its specs in its manual at the Internet Archive.It has RS-232 interface and comes with a 5.25" floppy disk with a MS-DOS program to display measured values (it was useless even back then, because you couldn't control the multimeter remotely). I decided to keep it as a backup meter, so I tested it. All ranges were still well within spec, but it drained the 9-volt battery very quickly, even when turned off (in standby). The standby supply current fluctuated over time, usually it hovered around 200 uA, but could go as high as 900 uA. Since the meter comes from pre-Google era, all my searches about this problem came up empty. Fortunately, itsservice manual is available at Elektrotanyaand I started poking around the usual suspects, electrolytic caps. But they all had negligible leakage current. In the end, I found 2 separate problems that caused the high standby draw:1. The multimeter uses a J/K flip-flop (IC9, CMOS 4027) to auto-standby after a few minutes. It's permanently connected to the battery (VCC). But only one flip-flop in the package is used, the other one has all inputs floating. Apparently their input voltages drifted over time which cased the supply current to fluctuate. It's odd Metex designers would do such an amateur mistake, but they did.I suspect it may affect other Metex instruments, too.Anyway, I connected all inputs (pins 9 to 13) to ground (pin 8 ) with a thin wire. Note IC9 is surrounded by display and button PCB pads, so you must keep the wire within its footprint. That reduced the standby current to about 60 uA - better, but still way too much for a battery-operated device.2. PNP transistor Q5 switches the battery votage (VCC) to the rest of the circuits (V+) when the meter is turned on. But the original transistor had high C-E leakge. After I replaced it with BC807-40, the supply current dropped below 0.1 uA. Unortunately, Q5 is partially hidden under C35, so you have to desolder it first.I made some more photos of the multimeter's internals, but it has pretty standard construction for the era. Only several THT resistors around MAX134 stand out, they look like they were added manually because the original resistor network wasn't available. It was a real chore to put the meter all back together properly, so I hope this was the only repair it will ever need...

author: coromonadalix
author_rank: Super Contributor
timestamp: November 01, 2024, 06:19:15 pm
content: this meter has some Metrix look a like in the MX-5x series i tough they could share the same tech inside, obviously not
Metex - M3850D - unstable higher resistance readings - Page 1
Forum section: electronics / repair

author: iMo
author_rank: Super Contributor
timestamp: August 21, 2023, 12:08:08 pm
content: I've been using this nice meter for almost 30y and it works fine except the resistance values larger than ~kiloOhms are getting unstable readings (something happened a month ago or so)..Most visible it is with large values where it takes pretty long time to converge to an aprox value and even then the readings are unstable and a touching the resistor's leg makes the reading almost all over the place.Perhaps somebody has made the similar repair already, I've found the schematics (1995) online (attached).My suspects are the two MPSA42 protection transistors around the ohm ranges coming into the MAX134..

author: iMo
author_rank: Super Contributor
timestamp: August 21, 2023, 01:30:52 pm
content: Added the "service manual" with pcbs..