Roberts DAB radio repair

[@marshallohio5512]

Clicked on one of his videos a week ago, and now it's like a daily soap opera !!! This guy has some serious serious test equipment !!

[@DalmaTon-Records]

Yes, he has, and he's awesome technician, too. And when serious test equipment in question, you may look at the channel called Mr. Carlson's Lab, when he sits in his small booth full of test equpment it looks like he's sitting on an apollo 11 spacecraft, for me at least. Especially his older vids because he rearranged the gear and moved it in a bigger space in the newer videos, but he still has a very very impressive collection of equipment... Cheers!

[@philgallagher1]

I've never heard anyone but my late mother say "It's the way you hold your tongue....."! Thanks for the memory!!

[@christianreichelt824]

I'm not interested in electronics repair, soldering or circuit plans at all. But watching you work (from Germany, by the way) with your positive attitude, patience and love for the challenge brings me in a good mood. (Excuse my bad English, but I think you'll understand.) I wish you the best, sir.

[@chapman9230]

I agree.I have a degree in physics and solid state electronics and I am a patent attorney. I like to repair things but this guy is at another level and it is addictive to watch.

[@karenl.9234]

Your english is better than a lot of native speakers

[@ChishanFipz]

He's also a really grounded individual, nothing phases him - not even a huge zap of a rather large capacitor. Just laughed it off ...

[@christianreichelt824]

@@ChishanFipz Maybe a zap doesn't phase him because he's GROUNDED?🙃(This is not electrical advice!)

[@christianreichelt824]

@@karenl.9234 Thank you, that's nice of you to say!

[@mosesjurassic3686]

I've seen many of Mark's excellent videos. But this is by far the most insane and impressive one. I got the shivers by only watching it. Mark's sheer dedication is absolutely mindblowing.

[@mrx.2233]

Mark is always smiling. Enjoy watching you buddy. I have a laugh every now and then when you animate the repair process with a little sarcasm.

[@midinotes]

Loved how the saddest piece of music in history (Adagio for Strings) started playing when you fixed the power amp! That was a very impressive fix and requiring the patience of a Saint. Top work Mark! 😊

[@Jaycobson]

I'm not into electronics, but you take us on a journey with your videos. Brilliant entertainment 🎉

[@peterduxbury927]

Seeing the Roberts Radio takes me back to when I found an immaculate tan-coloured one of these on a Council Tip in 1966. Obviously not DAB back then! My father was much like yourself, and he quickly diagnosed why the Roberts didn't work. He also got the Oscilloscope out! Even though 57 years have passed, I still remember that the radio had a faulty Oscillator Coil, and this was a Weyrad P50 /1AC. Coil was replaced, and I'm sure that it didn't fail again. I moved from the UK to Australia, it "got lost" in transit. I am always amazed at how easy you can fix almost anything electronic. This has been a lifetimes' hobby for me, and I "have a go". If I exhaust my knowledge, and cannot fix anything, it goes to the Tip. You need an Apprentice!!

[@drummerhammar]

Unbelievable! soldering that small ic took some skills! Great work Mark!

[@GavinTranter]

Just want to say thankyou for the video, found it when i was working on my Mums RD60 where she had used the wrong power supply and blown not only IC11 but IC8 and the amp IC4. i used your method of mounting a LM3475MF Upside down and changing the Feedback network resistor. working perfectly again now :)

[@darylhudson777]

When you used that old saying "if I hold my tongue just right " I did not know that originated in the UK. I thought it was from the Southern USA as I have heard that for years here. 🇺🇸🇬🇧👍

[@FastAsFunk]

This was really good to watch, thank you. I used to make simple repairs of basic stuff (like a loose wire, blown driver, broken component etc) but even on old school through hole stuff my hand isn't really steady enough. How you manage with tiny surface mount components is amazing...!

[@benaires07]

This guy has a god sense of humor and loves what he does!!! Keep it coming M8!!! Love your work!!!

[@janecooper288]

Brilliant radio bloke and obviously loves fixing radios.

[@zimbab5748]

You, my friend, are a genius. You do wonderful work and are very knowledgable. Pleeeeease post more repair videos of modern electronic equipment. And explain as much as possible. Thank you so much!

[@MendItMark]

Thanks! The next video ( still in edit) is indeed more modern. A 4kW level switching amplifier, all on one PCB!

[@zimbab5748]

@@MendItMark ah man I can't wait to see your next vid! So many questions for you! I live in the Caribbean, so electriconics get destroyed and there are no parts and no experts. You are a wonderful inspiration for tackling these jobs and making it happen. All the best, Dax.

[@stephensomersify]

Open mouthed, lock jawed, bated breath aaaaaaaaand REWARD for EFFORT - well appreciated (been there, tried and failed all too many times) - salute to you sir --- old git, UK

[@batmandestroys1978]

You are a genius! What a talent! You never give up! Best channel on KZbin. Your Channel views are going to go through the roof! I just discovered you! Love you approach to repairing items and life!

[@marcse7en]

Yes indeed! ... With the state of the World today, life certainly needs "repairing!"

[@SlartiMarvinbartfast]

@@marcse7en Perhaps we could get Mark to fix all of our broken politicians and self-serving people in the media.

[@marcse7en]

@@SlartiMarvinbartfast Well, Mark is talented and seems well able to repair just about anything, but there are limits! 🤣

[@b.malnit8983]

Markyou amaze me how you tear into these things like you actually engineered them. You definitely listened in class.😂😂😂. You are an electronics genius.

[@bas1cbas1c]

Great job - looked incredibly fiddly! I'm amazed and pleasantly surprised you were able to get schematics.

[@ecc84]

The thing i've found with Roberts radios is the schematics are often quite freely available.

[@KendalPepe]

@@ecc84 would you happen to have one for the Roberts Revival iStream3, the all sing all dancing model..?

[@ecc84]

@@KendalPepe Afraid not, that's one of those new fangled digital pieces of rubbish... bring back the old analogue radios way easier to repair.

[@janotto5028]

The best service man I have ever seen on the tube, thank you for your fabulous work and help

[@sebastiansekinger5070]

You're an inspiration, I would have probably given up on this, but you prove time and time again that it is worth persevering!

[@alanmangroo3656]

Great video. You have the steady hand of a surgeon.

[@kendom33]

Fantastic video. As an old school repairer I'd probably have been able to get the cover off and no more! Bring back OC44 s (not really but yo see where I am) well done getting it running

[@AJBTemplar]

I found your channel by accident and despite not having much if a clue about electronics, watching is addictively fascinating!

[@TheGbab]

Fabulous to watch! Reminds me of Fantastic Voyage, where a submarine goes into a persons bloodstream. Working with surface mount components is truly micro surgery!

[@SW-ci9zv]

So much patience and I admire Mark's ability to work his way through solving the problem. Like many of the other comments on here it is an enjoyable watch and I wonder how many pieces of equipment end up in the bin because they do not get repaired. I guess the time element is a large part of the cost equation for a repair.

[@lw2978]

That and the expertise and masses of equipment required-Mark has some serious knowledge and electronics available to him. Kudos to people like him out there who can bring these devices back to life and help prevent further landfill.

[@ijjorama]

The most instructive and engaging repair vids I've seen in ages!

[@michaelfirth1075]

This guy knows his stuff, I know nothing about electronics but enjoy your videos.😊

[@ovalwingnut]

Oh my aching eyeballs Very nice work & a "good save" as this would have certainly bin tossed out. It's really one of the nicest ones I've seen. And probably the last of the 'repairable' ones that we will see moving forward. But don't let that go to your head. Cheers from So.CA.USA 3rd House On the Right.

[@SwingBandHeaven]

I know I shouldn't but each time I see that clip in the intro of you getting a shock cracks me up every time. I think it's your reaction afterwards!

[@merlin5476]

I used to love repairing the odd item yrs ago & make amps & light shows etc in the early 80's when you could pop to maplins ( or bill flemmings) buy what you wanted & shove them onto copper strip vero board and actually see the components..... fast forward to today, there's no way i could or would tackle the kind of repairs that you carry out. Well done mate 👍

[@djrobwag]

Mark again a very interesting video of a fault finding and comedy really cheers me up, keep up the the good work Mark

[@Perbear]

Amazing repair fixing that DAB radio! And an excellent tutorial on tracing the faulty bits as usual😊 Thank you for your excellent videos!

[@alexanderjenkins8601]

Wow class D anplifier in a Roberts radio. They have gone down hill.

[@Yorumcu63]

I was watched your all 44 video Because you are best about electronic repair channel in youtube.You have great knowlodge and great patinence too.

[@briangoldberg4439]

really fantastic soldering on that resistor. you make it look easy!

[@turbokadett]

1:57 - If the aerial has a little screw at the hinge point (rather than a rivet) then you may be able to undo the screw, take the telescope off, then a regular deep socket should allow you to unscrew the base. Great SMD soldering skills, I think I held my breath for the whole duration of the TPA2005 installation!

[@GodmanchesterGoblin]

Just use an 11mm box spanner passed over the whole aerial. (All Roberts DAB radios with removable aerials use the same size.) Obviously you can't use a T bar to turn the spanner conventionally, but even putting the bar into one of the holes by a few mm will be enough.

[@mikes877]

I've mended lots of devices but given up with surface mount components. Thanks for the demo that it can be done!

[@danstewart8218]

Wow just wow...Both of us watched you fix a Peavey power amp that was absolutely fubar, and then you did the fiddliest of fixes on this...Amazing! All the best! ;D

[@iantyler4045]

Those Class D chips can be a nightmare to replace. The whole underside is a heatsink which has via's to the other side of the PCB which require large amounts of heat to remove and replace them. It's amazing they work at all considering how much heat has to be applied to them. Your inventiveness with the 5V chip was quite entertaining. Not sure I would have gone that far but hats off to you for not giving up. Great Video.

[@TheOptimod]

Hats off?

[@radiowyn1703]

Really enjoyed watching that. Look forward to more radio fixes.

[@cooper109]

I’m so jealous of your skills I’ve been watching your vids for a couple of weeks your a master class and such a smiley face too … thanks for the vids

[@Downstairsish]

When you clean with that paper.. God it reminds me of 1970s school toilet paper!

[@Mullspeed]

Awesome repair and guide, I've got 2 of these from my local repair cafe and both exhibit the same issues as yours (well PSU for sure but I bet the amp has gone too). Now to purchase the parts and emulate your rework!

[@justicelut]

Love your work, and your banter! Thanks.

[@MikeGervasi]

FLipping the chip upside down. Brilliant. Like swapping transistor legs around.

[@keitholiver33]

Very impressive work! I don't think I will be attempting this repair myself though those chips look incredibly small. For anyone in my position Roberts are one of the few manufactures that still offer a repair service.

[@KitsuneAlex]

You good sir, deserve at least one medal. Great video as always, love your content

[@ReinhardLahusen-rb4xs]

Best what ever I have seen ! Iam from Germany und my English is not good, but Marc is the Best of World electronic Man !!! Thankyou for many Videos !!!

[@johnburrows7938]

Your a happy chap..can’t work out if it’s a nervous smile or a genuine ‘ I’m so happy’ smile. Anyway, very good repair, most may just throw that radio away. You have a new subscriber. It’s a thumbs up from me 😊

[@boboala1]

Oh, MaGoo, you've done it again!

[@louiselyon3849]

Mark! You are the most cheerful genius I’ve ever seen! 😁 My (blue) Roberts radio, similar model with back access won’t switch on either…. Maybe you do repairs?! Thanks

[@admiralhipowa7158]

Very fiddly work skill fully done. Great content.

[@martinyoung459]

Brilliant video. Thanks for identifying the voltage down converter IC. I have a friend's similarly faulty Roberts and the same IC seems to be to blame. Alas, this one is outputting the full input voltage so goodness knows what else it has fried (the radio's drawing 8 watts continuously which is ominous). I'd try replacing it anyway, except I can't now find a replacement, nor a suitable substitute. Alas. I know when I'm beaten.

[@patrickburton6130]

Incredible, I admire your steady hands, lol

[@edwardkrarup8816]

When used to work at a lever company I used to make all those handles for the Roberts radios. The sewing machine with two needles, use the stitch at the same time.

[@HanD_1964]

Another type of technology secured! Well done!

[@Petertronic]

Great repair job. New subscriber. I'm hearing about sound-bars failing all the time because of these pesky class D amp chips handling so much more power than you'd reasonably expect from them

[@chrisyates8115]

Your amazing! Surgical genius, a Pleasure to watch!

[@andrewstewart8704]

Awesome fix Mark! Happy new year!

[@michaelclutton8446]

Thanks for the video, I repair radios but that was above my pay grade. I have subscribed regards Mike

[@hahanah1463]

great to see such knowledge and expertise,

[@julianebbs4981]

Love watching your videos! I too am an Electronics engineer and feel your pain with smd components, but I have to deal with hand soldering 0201 packages, like bits of dust!!

[@santaclaus179]

when I was young I repaired tv sets, now I am retired and sometimes still fo some electronic repair , I was vice president of quality in a american electronic company , the problem is that today you need a lot of stuff to repair products, also spare parts are not always available , therefor many products end in the garbage . nice lab you have , regards from mexico

[@tekvax01]

Bloody brilliant mate! Nicely done...

[@AIexanderHartdegen]

I had some issue on a high serie car radio. It had 6 buck/boost converter, wich failed. Despite all researchs and investigations, despites voltage simulation I failed with the troubleshooting. So, this is here an amazing win.

[@anthonyramdass2396]

What a brilliant cheerful technician keep up the good work bro.Anthony South Africa.New subscriber❤❤

[@peteschreiber9517]

Great work. Nice work shop. I enjoy your videos.

[@darylhudson777]

And the last song you played on the radio was " Drive " by The Cars released July 23, 1984.

[@rastaman5105]

That,s are good build quality radio,s , ROBERTS radio are very good , greetings from Assen in the Netherlands !

[@somethingorother5782]

Almost 8 volts instead of 7. I wonder if that power supply wasn't bad after all. Perhaps it misbehaves even worse than putting out an extra volt when in use, and it's what fried those two chips.

[@dougcollins9980]

I have experienced failures on 3 different DAB radios - which appear to be due to controller chip issues. Not sure if I have just been unlucky or if this is a common problem. The issue I have seen is where certain control buttons cease to work altogether - such as the volume, menu, station presets. This doesn't appears to be physical failure of the button(s) but rather of the electronics recognising that the button has been pressed (or rotated for the volume). In all 3 radios multiple buttons stopped working at the same time - and with 2 of the radios the button failures were progressive until none of the buttons were working. Essentially you end up with a radio that is frozen on whatever station and volume you last selected - with all the controls locked and unresponsive. Initially removing the power often unlocked the controls but in all cases this ceased to work after a few days. The radios were 3 different brands - the oldest being a Roberts RD-25, the next a John Lewis branded Aria II, and the most recent a Pure Evoke H3. The last two I suspect may have the same type of controller chip and or firmware (the LCD menus are near identical). Anyone experienced a similar issue with DAB radios?

[@KlodFather]

Bodge is also called a Kluge as per my old engineer friend Herb Gass. A brilliant electronics guy and mathematician who I respect a lot. We had a Brit family living int he neighborhood so we know the word Knackered... which birthed the term Knicker Knackered when something is in a screwed up state or in disrepair or just plain NFG. Good repair. I might have used a digital switcher regulator in the 78xx family... they came out with switcher versions and then put them in small SMT and micro packages which would have worked good here with three wires and no reference resistor. IF you need to adjust a regulator that attaches to ground, put diodes in series with ground and they will adjust themselves accordingly. .3 schottky .7 Silicon and add to make different combinations.

[@plunder1956]

The Music you were playing was Adagio for strings by Samuel Barbour. I only know that because my mother used to play it. That was a trick fix, with all those cans plus surface mount components.

[@davecooper5951]

Nice repair Mark - SMD's....Hmmm, I can usually manage the polarised cap's but the other devices drive me nuts and I often damage the tracks when changing them ! I have an illuminated magnifying glass but your microscope looks marvelous.....

[@marklimbrick]

It must only be a mono output with the one speaker. Far easier to replace the amp or 5 volt supply section with another mini d class module from eBay. Those amp chips need another blower or iron on the reverse of the board as well. I would have been wary of an intermittent fault in the wall block. And they are difficult to cut open and not safe to glue back together. Well done for having a go and saving it from being junked.

[@josehugobarrerasanchez8350]

EXCELENTE REPARACION, y afortunadamente se pueden conseguir los COMPONENTES SMD en algunos PAISES y en algunos CASOS también solamente 🤔👏👏👍👍👍

[@chapman9230]

Great job designers, all that space left in the box use components so small an ant would have trouble repairing it. I think all designers should spend a week using and repairing the things they design before they are released in the public. Crazy. Basically unrepairable unless you have these skills and equipment which I doubt many have.

[@johndale7760]

Hats off to you Mark for your skill and tenacity. Your natural ability to sniff out where the fault might lie (often in the absence of a diagram) is wonderful. I'm in the 'game' too (in Sydney Australia) and most often manage to repair stuff others have given up for dead. But one question: I see you using the heat gun to desolder (and resolder) chips and stuff. And you seem to hold the hot iron on to joints for a relatively long time. Aren't you worried that the heat will destroy or weaken the replacement parts?

[@TheOptimod]

Hats off??

[@camhyde9701]

24:34 - Adagio for Strings by Samuel Barber "a bit dreary"? This is one of the best known compositions of the twentieth century and has been recorded hundreds if not thousands of times! Seriously Mark that comment is sacrilege. The good thing is it has prompted me to listen to one of the many recordings I have of it. I love your channel. A shite radio coming to life at your hands and this piece being the first music it played when repaired is beautifully ironic =).

[@papermill100]

Great job, great communication.

[@soulrobotics]

When you use the paper to clean, it sounds like you are sanding. It is seen that the microphone picks up more high frequencies. Actually that is absorbent paper that is very soft.

[@gower1973]

What a beast of a scope that Tetronix is, Even though it’s old by today’s standards, I bet it cost an absolute mint when it was released

[@tasmedic]

I'd probably not have worried too much about using a thin bit of wire on the dc-dc converter, considering that the power supply to the whole thing was travelling down a long, flimsy, ribbon cable.

[@Thomas-yr9ln]

I had a solid green radio like that it was a olive green. Same battery holder.

[@drewrobertson9396]

Unfortunately much of the stuff I'm asked to repair has corrupted software. Radios, bikes, washing machines, sewing machines, even power tools. Now't one can do. A radio a few years back (might have been a RR) completely brain dead. Manufacturer had flat-rate repair cost and it came back perfect with a NFF -- no fault found. Obviously the first thing they do on receipt is flash it.

[@davidhudson1168]

Great video, love to know how you got your hands on the schematic, I’ve tried everywhere without success.

[@greenbanananas]

Fantastic. Apart from "Rylan on Saturday" which made me feel sad.

[@gb5uq]

Visited a recycling place some time ago they were throwing pallets of DAB radios in the granulator. As you would expect they watched you like a hawk in case you rescued one. Shocking waste.

[@shimarlie1]

If you started an online course in how to repair stuff I would GLADLY be your first student.

[@gurtana]

Wow, all that work to get it functional again! I might have the same problem, no idea as I don't have the tools to investigate (or the know how), but if it is the same problem, looks like my Radio will remain dead.

[@Nukle0n]

Some interesting high frequency squealing when you turned it on after replacing that first buck converter

[@camjocotem]

I started getting into repair myself but never really got handed anything wrong with a pcb board. A lady at work handed me this exact same radio possibly with the same problem. I think I should get her to find someone more experienced than me 😅

[@nickhooper1512]

Excellent informative video. You really are very good.

[@martinda7446]

Ha, ha I found one of these a few years ago abandoned on the street... I thought it would be an easy fix. So at a couple minutes in to your video, I began to remember and those little tin boxes were a pain, the whole thing was a pain. I had the exact same fault.... Now I'm going to watch you do a much better repair than I did.... Then comment at the end... You are just bodging the buck chip which I did a similar thing, expecting it to jump back to life.. there was another chip above the display...I remember was also knobbled... Ok back to vid...

[@xeroidkid]

Mark, I’ve been watching this repair and I’m almost sure I have this same fault on my Roberts Rambler BT. I’m going to see if I can apply the same technique to repair mine. Any help with the diagram would be great.

[@andrewcherry3350]

Mark would have a giggle if he blew his arm off. Love his video

[@InvincibleViolinist]

Some great ideas on working with SMD components in this video! I need some flux like you ar using; can you share the brand/type? The stuff I have on hand is either too runny or too thick.

[@jimboy698]

Interesting that two power devices had failed simultaneously. Maybe a higher voltage power supply was connected, 12V are common and can be the same size plug. This seems to be something not included in the design requirements for 5/6V electronics but certainly happens.

[@RWL2012]

1:04 wow!!! that's a new one on me for such a recently made product!