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  • Re: MX4000 Repair

    Progress! B6 doesn't seem to be a common one that's for sure as not listed in any of the guides or the service manual. Have a good read of the service manual section 7-1 onward it might give some clues about how to troubleshoot these codes. Hopefully someone here may have seen this before and can advise.
    Posted to The Workbench (Forum) by flex on Fri, Aug 2 2019
  • Re: MX4000 Repair

    Looks like the lack of colour is probably a symptom of the issue on the video board. What you have to remember about the error code is it is not pin pointing the exact place of the issue but pointing at the circuit and chip that is telling the protection mode to kick in and keep the TV in standby mode. Your issue (86 = 14IC9 Video Controller) is not specifically going to be IC9 that is the issue but one of the many components it is monitoring / connected to. I really am no expert here but I wouldn't
    Posted to The Workbench (Forum) by flex on Tue, Jul 30 2019
  • Re: MX7000 CRT - No Power

    Not with this particular set in the end I threw in the towel because I believed there was an issue with the high voltage transformer and ultimately I could not find a suitable replacement part, also this particular set had been run for many many hours as was evident from burn in on the tube etc. I ended up finding another MX7000 for a really good price in much better condition, I still kept some bits back from the old set though as spares. I learnt a fair bit about these sets on my journey though
    Posted to General Discussion & Questions (Forum) by flex on Sun, Jul 28 2019
  • Re: MX7000 CRT - No Power

    I did find some dry joints on R2 (Thermistor for Degauss) and C2 seemed a bit wobbly so re-soldered these but was still a no go therefore I came to the conclusion after much investigation and swapping capacitors that it was likely to be the high voltage transformer and I was not able to find a replacement for it. Not all was lost though I picked up another MX7000 (SW1.0) in excellent condition with the motorized stand for about £40... It had been sitting for 5 years unused but powered up fine
    Posted to The Workbench (Forum) by flex on Sun, Feb 3 2019
  • Re: MX7000 CRT - No Power

    Ok so I checked those capacitors removed them and re soldered them to the board, none of them looked suspect or had dry joints and capacitance test with the meter shows them to be in normal tolerance. C12 i believe to be OK bu I will order replacements for all of these anyway. The fault has now progressed though, the TV no longer actually switches on, it comes out of standby but no picture and I was hearing a SHHHHHHHH sound for a few seconds followed by a bang and then back to standby mode. I had
    Posted to The Workbench (Forum) by flex on Wed, Jan 16 2019
  • MX7000 CRT - No Power

    Hi Guys, I am new here! I picked up this lovely CRT recently for next to nothing but it wouldn't switch on and I could see no red standby light at all. My plan is to bring this beauty back to life for use in a retro gaming setup. I spent some time doing lots of research into the common faults and found this old thread Workshop How to rebuild a MX4000 MX6000 MX7000 and AV9000 which has been extremely useful. I tested the components on the main board and found a failed TR33 (BU2508DF) transistor
    Posted to The Workbench (Forum) by flex on Fri, Jan 11 2019
  • Re: MX7000 CRT - No Power

    Excellent thanks... I will check these and report back!
    Posted to The Workbench (Forum) by flex on Fri, Jan 11 2019
  • Re: MX7000 CRT - No Power

    Ok an update.... I spent some time doing lots of research into the common faults and testing components on the board and found a failed TR33 (BU2508DF) transistor. I couldn't find any dry joints or anything like that but i replaced the following components in the circuit. TR33, C100, C101, C102, C103, C104, C105, C106, & D82. So after replacing them.... Success! Red standby light came up and the TV switched on. I was feeling quite proud of myself at this point but alas it wasn't to last
    Posted to General Discussion & Questions (Forum) by flex on Thu, Jan 10 2019
  • MX7000 CRT - No Power

    Hi Guys, I am new here! I just picked up this lovely CRT recently for next to nothing but it wont currently switch on and I see no red standby light at all. It has a 2 pin Euro plug on the end of the cable which I have plugged into an adapter (I am in the UK so a 3 pin adapter) and the TV is rated for 240V AC. I did find an old thread called Workshop How to rebuild a MX4000 MX6000 MX7000 and AV9000 but it is missing the pictures. I assume the fuse / power supply would be a good place to start, does
    Posted to General Discussion & Questions (Forum) by flex on Fri, Nov 23 2018
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