Subwoofer repairs are now getting very common, at least the current trend of home cinema is still keeping us in work. If i see one of these, your tip will save me a lot of time. Thanks for another very useful video.🙂👍
Good video again MD. As an aside I notice the mini coloured croc-croc leads in the background. I had quite a few packs (of 10x) of the same a few years ago from CPC, very good price but most were open circuit. Turns out they all needed wire ends soldering to the crocs as they had been stripped but then crimped onto the insulation only, still very good value even with the re-work, but typical of some China quality I guess!
Yes I have noticed some of the new ones are crimped, I need to get some new ones , some of these I have are so old the the plastic has gone hard and they are difficult to squeeze open .
All the best Michael, I've repaired a couple of those myself a while ago, although the ones I had were PSU faults, looked like they'd had a mains surge.
@@peterdavies7623 Hi, it's worth ringing Richer Sounds, I was able to order a replacement complete amplifier plate for one of these. That is the entire electronics part including amplifier and psu. Was around £80 if memory serves correctly.
Hello MD. Can we have a new year series on your home made test gear with circuit diagrams etc. It is most interesting taking a step into the past, or as we older gents call it, the good old days
Another extremely interesting video - thank you for sharing it with us. It was nice to see you do the soldering and the changing of the failed diode. What did you use to remove the black glue that was covering part of the diode?
That looks extremely complicated circuitry for a sub-woofer. I used to build them using two op-amps wired as second order filters, in tandem, and a good quality power amp I.C. Sounded brilliant with a 12” bass speaker in a small cab.
@@michaeldranfield7140 I know right! As soon as it’s condensates or moist this stuff soaks it up. I’ve done several krk rokits and seen water dripping from them at times Mike!
First check would be on the power supply rails to the chips, if you don't have the circuit diagram you can get this information from looking at the datasheets for the chips .
Found it the hard way the first time by changing the SMD chip, that's why I had them in stock , I have since had this same fault quite a few times now .
Hi MD , nice explanations. I have this minx 201, i need your help, For replacing sub, from jbl 1300 soundbar sub. to this minx. Bcos jbl sub is big and sound quality (not good)(big 10"). Pls help....
sorry I cant help with replacement speakers, I am told cambridge audio has been bought out by richer sounds so you could try there to get a replacement speaker .
I don't really have anything against surface mount but its a lot harder to test as you cant just unsolder one lead and the smaller parts get the less numbers they print on them .
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I bet everyone thought you were going to say it was the glue causing the fault LOL - nice vid once again MD
Probley, yes, but in this case the glue seems to do no harm.
Subwoofer repairs are now getting very common, at least the current trend of home cinema
is still keeping us in work.
If i see one of these, your tip will save me a lot of time.
Thanks for another very useful video.🙂👍
that sounded so much like a dsp/adc issue think id have missed that one ! well spotted
Had this a few times now so I guess it's a common problem.
Good video again MD. As an aside I notice the mini coloured croc-croc leads in the background. I had quite a few packs (of 10x) of the same a few years ago from CPC, very good price but most were open circuit. Turns out they all needed wire ends soldering to the crocs as they had been stripped but then crimped onto the insulation only, still very good value even with the re-work, but typical of some China quality I guess!
Yes I have noticed some of the new ones are crimped, I need to get some new ones , some of these I have are so old the the plastic has gone hard and they are difficult to squeeze open .
All the best Michael, I've repaired a couple of those myself a while ago, although the ones I had were PSU faults, looked like they'd had a mains surge.
So far I have only had the diodes and hip go wrong on these, does not seem to be a service manual either.
I’m looking for someone to repair my X200. The unit doesn’t power on any longer. Can you help?
@@peterdavies7623 Hi, it's worth ringing Richer Sounds, I was able to order a replacement complete amplifier plate for one of these. That is the entire electronics part including amplifier and psu. Was around £80 if memory serves correctly.
Hello MD. Can we have a new year series on your home made test gear with circuit diagrams etc. It is most interesting taking a step into the past, or as we older gents call it, the good old days
Another extremely interesting video - thank you for sharing it with us. It was nice to see you do the soldering and the changing of the failed diode. What did you use to remove the black glue that was covering part of the diode?
stanley knife but you have to be very careful as you don't want to damage the print or any smd components under the glue
That looks extremely complicated circuitry for a sub-woofer. I used to build them using two op-amps wired as second order filters, in tandem, and a good quality power amp I.C. Sounded brilliant with a 12” bass speaker in a small cab.
I think the more expensive they are the more deliberately overcomplicated they are to justifie the cost
Nice Mike, gonna say had them same output diodes shorted on this one before. Mine was not glue covered if I remember or not as bad 😁
Can't see what purpose the glue serves on the diodes apart from stopping you testing them!
@@michaeldranfield7140 spill over from holding the inductors down
@@michaeldranfield7140 I know right! As soon as it’s condensates or moist this stuff soaks it up. I’ve done several krk rokits and seen water dripping from them at times Mike!
Nice tip thanks MD
No problem, many thanks for watching.
If I remember correctly you used to be able to purchase the whole plate assy from Richersounds for around £80.
You could well be right I hear the brand Cambridge is owned by richer sounds.
I remember regarding goldstar tvs had a problem with glue in the power supply,
yes and that's going back a very long time , wouldn't you have thought by now the manufactures would have learnt there mistakes .
Thanks, Michael.
Do you offer repairs? My Minx X201 just started giving a high pitched tone/noise, even when no input is connected, just powered on.
Great video thank you! If you had power but no sound at all, which components would you check? Thanks :)
First check would be on the power supply rails to the chips, if you don't have the circuit diagram you can get this information from looking at the datasheets for the chips .
@@michaeldranfield7140 great, thank you for the tip! Was going to just take it to a repair shop but thought I'd have a go myself first
Great video Michael. How did you find it in the first place ?
Found it the hard way the first time by changing the SMD chip, that's why I had them in stock , I have since had this same fault quite a few times now .
Great respect for you Michael. Continuing to help your fellow enthusiasts for many years now. Sincere thanks from all of us
@@kendom33 Many thanks .
Hi MD , nice explanations.
I have this minx 201, i need your help,
For replacing sub, from jbl 1300 soundbar sub. to this minx.
Bcos jbl sub is big and sound quality (not good)(big 10"). Pls help....
sorry I cant help with replacement speakers, I am told cambridge audio has been bought out by richer sounds so you could try there to get a replacement speaker .
@@michaeldranfield7140 thank you
It’s the glue becoming conductive that’s caused the problem
It’s out of its case ! I’ve undone 12 screws now what . Please
Not a fan of any SMD rectifiers give my the old style 1N series any day without glue LOL
I don't really have anything against surface mount but its a lot harder to test as you cant just unsolder one lead and the smaller parts get the less numbers they print on them .
Мастер👍 сабвуфер плохой, ничего интересного
That heat sink isn't even finned, just a big chunk of Alum. That's funny.
engineered in the UK built in china it says on the back so you wouldn't expect much more .