Bang & Olufsen MX7000 - Capacitor Replacement Service & Repair Pt.1

[@RetroCrisis]

Gosh that set still looks stunning to this day

[@TheRetroBristolian]

yeah they're cracking TVs with incredible sound systems

[@Bergsy86]

Fantastic Video Mate! Ive managed to score a MX5500 and a MX7000 recently. will certainly be using this guide as reference when thinking about cap replacement and maintenance. Thanks so much! looking forward to pt2 of this video!

[@josejacobuk]

Hi great video, my MX4000 fizzled out last month and whilst there is some useful info out there online it's all old forum posts with very few pictures of the picture links are broken and yes i totally agree about the service manuals! Thank you so much for this video just gives me a bit more confidence to dig in and replace the caps. I know it will come back to life if I do change the caps out. This video will help a lot. Cheers!

[@TheRetroBristolian]

Thanks for the lovely comment, glad the video will be of some use to you! I believe the MX4000 and MX7000 are essentially very similar inside. I would probably recommend marking the cables so you know direction/location and also doing one board at a time if you can, best of luck with the MX4000!

[@jangoofy]

When you get around to it, the small board between the neck of the CRT connecting the horizontal and vertical deflection coils, very likely to have a burned / cracked joint on one or more of the terminals on the PCB.

[@TheRetroBristolian]

I did read about the deflection coil board, I'm hoping mine is OK, but I'll give it a look over for sure. I think I've already spotted some dry joints on the neckboard (board 3) - thanks for dropping a comment!

[@Johnathan_Waters]

I've repaired and restored countless B&O products from the 1970's onward... and a couple tips for you. The orange caps are "LN" (low noise usually) and are a higher quality, used for signal path or power applications. They very rarely fail in my experience. And one more thing.... ALWAYS always always replace any surface mounted caps!

[@Ipsissimus]

Hi, I hope you don't mind me asking. But my B&O CRT slowly turns blue after 10mins or so. It reverts back to normal when powering off and back on. I wonder if this is a resistor or capacitor problem on the neck circuit? I hope someone can give me a clue. Cheerio.

[@Johnathan_Waters]

The "mystery" caps are "Samwha" brand. Also, the BIPOLAR caps are the best sounding type (of electrolytic cap) to use in the signal path. This is the kind of thing that takes quite a long time to learn on your own.

[@TheRetroBristolian]

Ah, Samwha indeed, I thought it looked a familiar logo but without the text I just couldn't place it. interesting to know about the BIPOLAR info, I'll keep with BIPOLAR caps where they are fitted. thanks for dropping by with comments

[@kennethwilliamson3937]

Hi Jonathan. By any chance do you knowwear could finde a fly back transformer or know if the model part force b&oMx7000 16145127 My tv stoped working and I’m trying to locstecdd as part but findeing it hard thank you in advance

[@H6rdc0re]

@The Retro Bristolian Did the recap do anything for the barrell geometry issue?

[@kkkataugusto]

Hello! I moved to another place with the TV on truck, When I start the TV for the first time after the move. The LED in the upper right was getting less and less power now the TV doesnt start anymore. Could that be capacitor problem? The Led was blinking but I dont remmeber if it was red or green.

[@nkpnk-073]

Hi. I bought an MX7000 yesterday. I really like him! I've set up everything I need, but the image is clearly more blurry than on my mx 4000. Is there any way I can adjust the focus of the picture? Are there any handles inside for this, like other CRT monitors?

[@kennethwilliamson3937]

Hi there my mx7000 I was using it last night with my nes and all of a sudden ther was a static sound and then a crackle s as nd pop by any chance do you know if it’s fixable I live in the Uk

[@davidheaton5765]

Hi mate, are you still repairing B&O's? I'm up in Cheltenham and searching for someone who's able to repair a couple of old MXs!

[@Kjetil_MB]

Is it possible to disable the ambient light sensor in the top right corner so you can have full brightness all of the time? If you use a flashlight there the screen will get brighter. I think it’s too dim by default.

[@DaveRepairs]

Hi mate, i suspect caps out of value or resistor causing a ready state... i dont know... yoke look familar, one of the tubes here has that style. Planning on picking up another flat screen based tube tomorrow from the same place... also... we running SWAG this weekend at Chipping Sodbury, drop in for ten minutes as a guest, let me know if you do by messenger.

[@TheRetroBristolian]

thanks, I'll drop you a message today 🙂

[@guimbadriver]

i cant work with gloves on my hands in electronics repair

[@TheRetroBristolian]

I'm not a big fan of gloves myself! but if I'm using IPA to clean I try to wear gloves so it doesn't dry out my skin all the time! 🙂

[@jozefdzwonnik9450]

Great video. Do you have an email address i can contact you on? I can't see it in any of your links. Wonder if you could service an mx8000. Thanks

[@TheRetroBristolian]

on my KZbin home page there should be an about and an option to view email address. I do also have an MX8000 and will be looking at that in the future 🙂