Repairing a Bang & Olufsen VX7000 - Pt. 1: Rebuilding the power supply

This video is the 1st part in a miniseries of Bang & Olufsen VX7000 VCR problem/repair videos. This video attempts to cover removing, cleaning, and recapping the power supply, basic troubleshooting, and problem analysis and how to find and remove the lithium battery.
Chapters:
0:00 Introduction & Overview
2:20 Closer look at the VCR with faulty PSU
4:12 Removing the power supply
13:50 Looking at and disassembling the power supply
20:00 Preparing to and performing de-soldering of old capacitors
30:58 Testing old capacitors
35:34 Checking for cracking and damager solder joints
42:32 Capacitor information spreadsheet
46:38 How to build a cap kit
52:25 A look at the new capacitors compared to the old
54:16 Compare the old capacitor values to the new values
55:21 A look at the lithium battery and removal
1:03:27 Soldering in the new capacitors
1:06:13 Refitting the power supply
1:07:11 First power up with the rebuilt supply in the ‘bad VCR’
1:08:29 Rebuilt power supply in the ‘good VCR’
1:09:20 Comparing working and non-working power supply and additional troubleshooting
1:18:01 Testing the ‘good VCR’ with the rebuilt power supply in it
1:20:46 Testing the ‘good power supply’ (rebuilt) in the ‘bad VCR’
1:22:19 Testing the ‘good power supply’ (rebuilt) in the ‘good VCR’ and round up
Constructive feedback is welcomed in the comments. Thank you for taking the time to view.
Like what you see? Say thanks by buying me a drink! www.buymeacoffee.com/retrobri...
Channels of interest:
/ retrotechusa
/ mymatevince
Further reading related to the fault:
archivedforum.beoworld.org/fo...
archivedforum.beoworld.org/fo...
Tools:
Soldering Iron:
amzn.to/3rxK5eO
Desoldering station:
amzn.to/3i5XQy6
Capacitor tester:
amzn.to/372aAQ8
ESD Brushes:
amzn.to/3y57TZO
Microscope:
uk.banggood.com/MUSTOOL-G1200...
Picks:
amzn.to/2TBgMLP
Sidecutters:
amzn.to/2URHU9P
Cleaning products and consumables:
Flux
amzn.to/3i0zypg
Solder:
uk.farnell.com/multicore-loct...
IPA:
amzn.to/3kXGHsq
Cotton buds:
amzn.to/3rEhSmr
Heatsink paste:
amzn.to/371VkCM

[@Filipjensen]

Dying to see part two

[@TheRetroBristolian]

I can't decide if this is sarcastic or not! Either way, thanks for dropping by and leaving a comment - it is always welcomed! What would you like to see in a part two? I have the batteries to show being replaced, I also did a video on how to back up the software chips from the VX7000 you might like? I find it unlikely I'll be able to fix these VCRs unless replacement gears can be sourced.

[@Filipjensen]

@@TheRetroBristolian it is not sarcastic. I thoroughly enjoyed part 1. But seemed like there were a few more issues with the machine that would be interesting to see you troubleshoot. Thanks for the first video.

[@TheRetroBristolian]

@@Filipjensen thanks for the kind words I means a lot. there are things I'd like to show, the battery replacement would be interesting, working out why the non working unit is blowing the fusible resistor in the power supply would be interesting also. but as I say without tracking down replacement gears sadly I don't think they will ever work again. There must be someone out there that can reproduce the gears, I'm not sure if 3D printed gears would work. I guess I need to look into that more. Take care 🙂

[@pollo1962]

Hello, congratulations for the video, I also fixed my vx7000. It works well but the tape counter no longer indicates, there are only two bright dashes.
Do you know what I can check?
Thank you.

[@TheRetroBristolian]

Thanks for the lovely comment and congrats on fixing your VX7000 what was your original issue? if everything else is operational except the indicator that could be capacitors in that circuit perhaps. did you check what the voltage was like on your internal battery as well? Apparently odd things happen if that battery is dead. Please do keep me posted! Thanks again,

[@pollo1962]

@@TheRetroBristolian For the repair I replaced some capacitors, repaired a mechanical gear with fast-acting glue and lubricated.
Now I have another one that I fixed in the same way, it starts playing but after a few minutes the signal skips and the screen writes "no connection", if I PAUSE and then PLAY it returns for a few minutes and then stands out. I'll have to find the area to check for bad capacitors.

[@xcntry8908]

Removing accumulator

[@pollo1962]

@@xcntry8908 Yes, I changed the battery but it's the same

[@xcntry8908]

@@pollo1962 You need connecting this VCR
to "bang olufsen" tv in menu using "beolink"remote control changing
Display mode "time used"
Read user manual