• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

repair

  1. K

    HP 180C Oscilloscope repair attempt - no traces and hissing noise.

    Hi all, I noticed a wealth of knowledge and advice on these forums regarding oscilloscope repair, so I had to sign up! I while back I purchased a HP 180C. I have had it in storage a while and have finally pulled it out as a project to work on. Unfortunately it seems that I have no beam at...
  2. D

    Stabilising supply of noisy DSO-2250 oscilloscope

    I've had a DSO-2250 9-bit/250MSps/60MHz scope for a decade, bought "new", and it's always had a large ripple voltage (about 1/3 of a division) overlayed on any signal. The ripple sometimes made the DSO barely usable. At some stage I put a filter on the USB cable inline with the power; this...
  3. G

    Need help repairing a B+K 1650 Tri-Output Power Supply

    Hi all, I recently came into possession of an old B+K 1650 Tri-Output Power Supply that has seen better days, and I would love some help with getting it back to normal again. There are pictures and a video, as well as links to the schematic, user's manual, and parts list in this Imgur album. I...
  4. M

    Repair Lecroy Waverunner 104MXi

    Hi, I am trying to repair a Lecroy Waverunner 104MXi. The problem is when you plug it in and switch it ON, windows starts booting but then it just turns off. Now if I try to switch the oscilloscope ON again then it does not work until and unplug it and plug it back in again. I wanted to look at...
  5. D

    Old Radio Antenna

    Hello, I am new here and I need help with an old portable radio antenna. It seems to have gotten the solid tip stuck or fallen into the entire thing. If there is a way to get this solid tip out could you please tell me?
  6. W

    Fixing a pair of headphones

    First things first, they look like Beats, but I’m pretty sure these are knockoffs. Nonetheless, they sound pretty good, and I picked them up at Goodwill for a steal and love a challenge, so if someone is interested on taking on this electronics mystery with me I’d be incredibly grateful...
  7. L

    AIWA CX-NA777 CD Repair, please help!!

    Okay so I am completely new to electronics, but I am a professional Home Contractor with lots of experience fixing things in general. Recently I decided to try to fix up a stereo for my shop, and so I went and salvaged an AIWA CX-NA777 Stereo system that worked decently except for the CD...
  8. S

    Victron centaur battery charger overcharging, please help diagnose and repair

    Hi there, I have a Victron Centaur battery charger, 12v 200 amp output. It's a monster! On inspection it's actually two identical 100a chargers in the same case, connected in parallel. Other than a tiny 3 wire cable whose purpose I'm not sure of, there is nothing connecting the two chargers...
  9. P

    USB Port (Type B) Broken... Can this be fixed?

    I have a Zoom G5 pedalboard for guitar effects, but the plastic port came loose and disconnected from the 2 metal prongs. 1 of the prongs is broken, I have attempted to solder it back on with no luck due to my lack of experience in this field. If I take it to a shop to repair, would it be...
  10. U

    Repair help regards wall ac adapter

    Hello Friends, I am trying to repair a Panasonic Wall ac adapter (6V, 500ma) smps based, I checked with multimeter no output, checked and internal fuse with continuity and all okay, I am attaching pics, im novice so donno what else may be wrong in it, front and back image of pcb with components...
  11. JLNY

    Making a replacement cable for a HP 8445B spectrum analyzer preselector

    Hello All, Lately, I have been working on building a replacement for a somewhat rare cable assembly for communicating between a HP 141T/8555A/8552 mainframe spectrum analyzer and a HP 8445B "Automatic Preselector" add-on box, and I thought I would document my work here for others to follow. A...
  12. K

    Need Help Repairing Old PCB

    I collect old vhs, and recently got some cool gimmick ones that light up when you press a button. However, they are almost 30 years old and no longer work. Taking a look at the pcb both were heavily corroded. I scraped off as much green corrosion as I could and replaced batteries but no luck...
  13. A212

    One Logitech X230 stereo speaker not working

    I recently acquired a Logitech X230 speaker set, with subwoofer and stereo speakers from a friend, but was dismayed to learn that the left speaker is non-operational. The other one and the subwoofer work fine. Im a complete noob to sound/speakers, so I decided to open it up and look for broken...
  14. J

    Help repairing an Headset with dual jack connector

    Hi guys! This is my first post here because I'm in trouble finding a right solution to repair my headset. So this is my headset: And I broke to two jacks and lost them. The cable is cut before the plastic splitter and I´ve got an image with the cables. There are 1 green, 1 red, one copper...
  15. D

    Help repairing several Reconyx trail cameras

    Hello my fellow members, I have several Reconyx trail cameras that are broken and I am hoping someone can help me with. They cost around $600,- per camera and I am not able to send them out for warranty. These cameras are used to capture photos of wildlife (jaguars, tapir, etc.) and are...
  16. Spuriosity

    Repair of a BWD 820 Oscilloscope

    I recently managed to acquire a broken BWD 820 CRO for $20 and was planning on fixing it. According to the person I bought it from, it was working fine until the fuse blew in it - now, the fuse blows whenever you replace it and try to turn it back on. Does anyone with experience repairing CROs...
  17. A

    I don't have a Soldering iron?

    I'm repairing an HTC Desire 816 that had a broken screen and LCD. I fixed all of that but the battery terminal was some how pulled away from the circuit board. I need to solder the terminal back onto the circuit board in order to charge the phone. However, I don't have a soldering iron. Is there...
  18. B

    Repairing Blown Circuit - Overpowered with 10v 2.4amp instead of 5v 2amp

    Hello, I know near nothing about circuits and am happy to learn what I need, to get this repaired. Where do I start? I have a bluetooth music receiver with digital out (toslink coax) purchased from overseas. I connected an incorrect power supply and it no longer works (I first connected the...
  19. N

    Repairing QPAD QH-90 Headset

    Hi, so I have a QPAD QH-90 gaming headset that I am trying to repair. From the headset is a cable that then splits into a TRS plug for audio, and one for the microphone. The cable for the microphone broke behind the plug, so I was going to solder on a new plug. But the wires inside doesn't look...

Latest threads

EE World Online Articles

Loading
Top