Very quiet Bauhn DAB Radio from Aldi

A little DAB radio, repaired at the workshop.

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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.

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FixItWorkshop, May’18, Aldi Bauhn Radio, in for repair.

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.

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FixItWorkshop, May’18, Aldi Bauhn Radio, in for repair, back of the radio.

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.

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.

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FixItWorkshop, May’18, Aldi Bauhn Radio, in for repair, all fixed.

Cost of a new radio; £10.  Cost of repair; A bit of soldering and a cuppa plus gingernut biscuit.

G.E.T. Dehumidifier with damp issues…

GET dehumidifier with damp issues…

Over a cuppa, my mother in law mentioned that she was chucking out a dehumidifer this weekend and had already replaced it.  This was a shock to me since it hadn’t started it’s journey to Worthing tip via my shed yet.  Time to intervene.

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FixItWorkshop, Jan’18, GET Dehumidifier repair.

Aparently it had overflowed water all over the floor and had cut out and not restarted.  It had probably been left to its own devices in their cellar, totally neglected in the run up to its demise.

Before worrying my toolbox, I usually plug things in and press buttons to see what happens.  When connecting this dehumidifier to the mains, it fired-up and seemed to run perfectly.  Strange.

Looking at the device in more detail revealed three tell-tale LED lights (cooling, empty the tank and running).  The tank was removable from the front and featured a small float operated level which married up to a small microswitch.  The idea being that when the water rose to the top, the switch would be activated by the float and the machine would cut out safely, all being well.

The lever mechanism on the float seemed to be stiff and all that was required to restore service was a good clean with a brush and Fairy liquid and some silicone spray, once dried.

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FixItWorkshop, Jan’18, GET Dehumidifier repair, microswitch.

While giving the unit a general inspection, I noticed dirt in the units’ grille.  Fortunately, the grille had a removable filter which had clearly never been cleaned, so in effect had been chocking the dehumidifer in normal operation.  Bad news.

Piecing the evidence together in my mind surrounding the causes of failure, I came up with the following theory.  The float had failed, causing the unit to leak.  The unit had then run hot, probably for a while and had probably tripped a thermal protection fuse.  I have no evidence for the latter idea as I never opened up the unit fully, but the theory fits the sequence of events.

In any case, the dehimidifier now switches on and switches off when full and doesn’t seem to run hot.  I was pleased with that.  I wasn’t so pleased that my in-laws wanted the unit back.

Cost of replacement: Circa £100.  Cost of repair; cleaning stuff.

 

V-Tech Splash & Sing baby bath book

This toy wasn’t singing at its best…

My daughter was kindly given a V-Tech Splash & Sing baby book and always enjoyed singing along to the music it made.  It’s a splash-proof book which is suitable for bath time play, but not necessarily for complete submersion at 100 metres!

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FixItWorkshop, Sep’17, V-Tech Splash & Sing baby bath time book.

It’s a battery operated toy and has an on/off switch and volume control on the front.  If the middle page of the book is squeezed in a couple of places, there are small switch buttons inside the book page itself, the corresponding the tune changes, relating to the picture on the page- I hope that makes sense.

The tunes on this book stopped changing with button presses and it became annoying to here the same tune constantly being played at bath time.  Very annoying.

The casing is held together with a few Pozi-head screws and after a bit of wriggling, the pages came free from the spine (the bit with the batteries and on/off switch).

Upon testing, the wires between the pages and the spine had broken internally and no longer connected to the corresponding page buttons.  They’d probably broken as the pages were turned over a good few uses.

This toy is definitely not designed to be repaired.  The only way to get to the wiring was to cut open the page, cut out the damaged wiring and replace it with something a bit tougher.  The previous wiring was very flimsy and it would only be a matter of time before it broke, too soon.

I decided to use some thin gauge speaker cable, the sort you find in cheap portable radios for the repair.  This worked really well and after some careful soldering and gluing of the cut-open page, the toy was ready for reassembly.

This repair probably wouldn’t cost in, in the real world, but I hate extreme built-in obsolescence and this toy showed examples of it.

Cost of the toy, circa £14.00.  Cost of repair; my time plus some old wire I had lying about.

 

 

Opening a can of worms (or not)

A little repair for my trusty Probus can opener…

Readers of this blog would have worked out by now that I’m a little bit sentimental.

A short story:

When I moved away from home, many years ago, my mum made me a ‘moving out kit’ in which contained a trusty Probus Butterfly can opener, the classic British design can opener type.  Today, it broke.  I was gutted.

You can still buy the same tool for just over £1, so it clearly doesn’t usually cost-in to repair such an item.  However, all that seemed to be wrong was a broken pivot or spindle.  The original riveted fixing had worn and eventually sheered off today when opening the cat food.

All that was needed was to re-rivet the can opener and all would be well again.  Luckily, I had some rivets lying around of the right size.  I grabbed my pop-rivet gun and 5 minutes later, it was ready to open cans once again…joy.

 

Faulty Sun Solar Systems 1500W Pure Sine Wave Inverter (20/07/17)

I couldn’t save the Sun Solar Systems Inverter…

On the back of my Sterling Power Products inverter repair (https://fixitworkshopblog.wordpress.com/2017/04/07/sterling-power-products-pure-sine-wave-inverter-repaired/) a customer enquired to see if I could repair his faulty inverter.

The customer’s inverter had been connected up properly but had been severely overloaded and  it would appear that the protection modules within the inverter had not operated correctly.  Therefore a burning smell had been reported, just before final failure.

This was going to be a difficult repair as I had no schematic diagram for the main PCB and I was effectively going to be testing components in isolation using rudimentary methods.

A quick look around the inside of the unit revealed no obvious damage, but upon testing the IBGT transistors on the units’ high voltage output and several Zenner diodes in line with them, revealed serious damage to that part of the circuit.

These components are not cheap and collectively, the cost in parts alone would have been over £50, without my time factored in and without the guarantee that the unit would work again.  On that basis, sadly, I had to inform the customer that the unit was beyond my help and probably beyond economical repair.  It will therefore be disposed of responsibly at our local amenity tip.

 

Cheap Tesco DVD player

This cheap and quite frankly nasty DVD player came in as a dud unit.  No lights on, nothing.  To be frank, not even I thought it would cost in to repair it, since the owner told me it didn’t cost more than £20 in the first place.

Never mind, off with the cover and a quick poke around with the multi-meter revealed no power coming from the transformer within the unit.  This converts high voltage from the mains to lower, safer voltages for the player.  On this DVD player and many others I’m sure, the internal processes are broken up in to ‘cards’.  On this unit, there’s a power card, a logic card for the motor drive and a video card for the picture.  Closer inspection of the (cheap and horrible) power card revealed several faulty components, which had failed catastrophically.  At first glance, I suspected that the cost of replacing individual components wouldn’t cost in and that sadly, this DVD player might be headed for the bin.

Fear not!  With the power of Amazon, I was able to find a generic suitable DVD power card via China that fitted, with a small amount of wiring for £5, delivered.  Job done.

Here’s a video of the fix.

 

 

 

 

 

Flimsy Bosch Athlet 25.2V cordless vacuum cleaner

I quite like the idea of this vacuum cleaner in that it’s lightweight, easy to use, highly portable and easy to maintain. All things that make a great product.

The particular vacuum cleaner came in to the workshop, just outside of its warranty period and had been looked after well.  However, it had developed a nasty intermittent cutting-out problem when in use.  I also noticed that the charger’s flex had also cracked near the wall plug, making it dangerous while charging.

First things first and it was off with the rollers and filters to clean any obstructions that might make a device like this overheat.  Nothing obvious there, but all items cleaned and washed as a precaution to allow the roller to move freely and the vacuum to breathe easily.

Closer inspection of the handle area revealed a weakness in the design which had meant that the quick-release mechanism had caused an electrical connection to degrade, causing the cutting out.

The only remedy was to address the handle’s weak point with a mechanical fix and make good the electrical contact.

I hope Bosch take note and make an improvement in this area on an otherwise nicely engineered item.

I also did a small repair to the damaged flex on the charger.

Cost of a new vacuum cleaner, circa £250.  Cost of screw… less than 50p (without my time of course!)

Here’s a little video of the repair…