I love a good radio. I used to collect them as a kid, working or not, do them up, get them working and I eventually ended up with, er… lots. I’ve since scaled my collection back a bit these days to around 10 or so, quite frankly more than is healthy really.
So when someone got in touch recently with a broken DAB radio to fix, I got quite excited.
These Bauhn DAB radios (available from Aldi or Lidl in the UK, I think) were on the market for about £10 and at that price they represent great value when compared to more expensive devices.
However, the one in the workshop appeared to have a problem power connector, which when wobbled, made the radio work intermittently. Suspicious.
Having already repaired a similar radio with a similar fault before, I decided to video the repair to encourage others to check theirs, if something similar happens. I hope you find it useful.
Cost of a new radio: £10. Cost of repair: One cuppa and a bit of tinker time.
Who wouldn’t love a new DAB radio for your birthday? Well, that’s what I had this year and I was thrilled to receive this Pure Evoke H2. After choosing a suitable location on my desk, I quickly unpacked it, plugged it in and…nothing. Booooooo!
The display backlight appeared to glow a little, but that was it and I was missing Today on Radio 4.
To save a quite frankly dull story, the returns and replacement process offered by the company who supplied the radio was hopeless. But, after 2 months, I ended up with a replacement radio, in addition to the one I already had. The second radio worked, albeit with some fettling required to the speaker to make it sound ok (another story).
Time to dig out the screw drivers as I had nothing to lose.
Just 6 screws hold the back on and with these removed, the radio’s innards were exposed. Now, I’ve made radios from kits in the past using components I can hold with my fingers, but with this radio, the circuitry was teeny-weeny and I would have to have some luck to fix it.
I was in luck. The radio is made up like a sandwich. The front fascia is screwed to the cabinet and the back, that I’d removed, was screwed to the cabinet, from the other side. There are data-style cables between the two halves and one of them appeared to be loose. I carefully pushed the connector ‘home’ and then re-applied the power lead and wouldn’t you know it, the display lit up and it burst in to life. Now we’re talking.
Thinking I’d sussed it out, I screwed the radio back together and had about a week or two of unbroken service, until the screen froze and then nothing. Oh no.
Re-opening the back of the radio, I suspected that the tiny soldered pins on the back of the multi-way connectors on the data-style cables, had been dislodged. I have average sized hands for a bloke, but I needed tweezers to get the connectors on during assembly. I wonder how much it would have cost to add an inch or so to each cable, to make manufacture easy. As a consumer, I would have gladly paid the extra penny. I suspected that this is how the original fault came to be as it wouldn’t have taken much more than a shove in the wrong direction to break the delicate connectors, due to the short length of the internal cables.
Since this circuit board is a tiny stamped component affair, I had to be quick and neat with my re-soldering. Each pin to PCB connector re-soldered, cables re-attached, back screwed back on and the radio worked once more.
Pure have a reputation for easy to use, excellent sounding products. It’s just a shame they have seemingly penny-pinched on some of the internal gubbins on this model. If yours develops similar symptoms, don’t give up, take the back off and have a look.
Cost of a new radio: £40-90. Cost of repair: 5 mins tinker time, one cup of tea.
A colleague of mine brought this cool little DAB radio in to the workshop as it’s once crisp DAB tones were now no more and all life from the little device, had seemed to have ceased. It was, very much, a dead radio. When working, it picked up every station available, really clearly and seemed to out-perform the much more expensive devices my colleague also owned. However, after a few months in the hands of his son, the radio would no longer turn on when plugged in.
It was brought from Aldi for under £10, which seemed like a bit of a bargain to me. It’s amazing just how much DAB radios have fallen in price in the last 5 years or so.
The Bauhn UDABR-0197 (catchy name) is a compact, portable radio and is capable of being used with either a plug-in adaptor (supplied) or 4 x ‘AA’ batteries. When powering this radio using either plug-in adaptor or batteries, the little radio refused to do anything. Very sad.
I always start with the basics, so I checked the power from the plug-in adaptor first, which seemed to be delivering its 5.9VDC, pretty much spot-on. As a side note, I always check the condition of plug-in adaptor leads and plugs as they seem to almost always be made of the thinnest wire available in the Far East and prone to cracking causing poor connections. This one was fine.
Opening up the radio was really easy, just 4 cross-head screws and the two halves of the radio came apart without any major dramas.
The first thing you notice about (cheaper) small appliances like this, is the ‘lack’ of anything inside. The circuit boards in new small devices can sometimes be multi layered affairs, using micro components, making repair with normal workshop tools very difficult or impossible.
Luckily for this little radio, the designers have had the foresight to keep the power distribution board separate from the main ‘radio’ gubbins and this seemed to be of conventional construction.
FixItWorkshop, May’18, Aldi Bauhn Radio, in for repair, PCB repaired.
FixItWorkshop, May’18, Aldi Bauhn Radio, in for repair, PCB back in position after soldering.
FixItWorkshop, May’18, Aldi Bauhn Radio, in for repair, broken pins.
On closer inspection of the power distribution board, it revealed a break in two of the pins from the ‘power-in’ jack socket meaning that power would not get through to the main circuit board. The two pins were also shorting together, causing a local loop connection. This meant than neither mains adaptor supply nor battery would power the radio. Problem realised.
I was then able re-make the connection using a soldering iron on the board, reconnecting the pins to a spare section of copper detail on the power distribution printed circuit board. Very satisfying.
Once the radio was back together, all screws back in place, power supply connected, the radio burst in to life, just in time for me to listen to my favourite station. Happy days.
Cost of a new radio; £10. Cost of repair; A bit of soldering and a cuppa plus gingernut biscuit.