The perfect blend…

An Optimum 8200 Blender, escapes the chop!

IMG_2844
FixItWorkshop, Worthing, August’20, Optimum 8200 Blender… in red.

When I agreed to ‘have a look’ at a customer’s beloved broken blender, I had no idea that the market for blenders was so, well, juicy.  One can spend anything from £50-£1800 – a huge price range.  You have to ask yourself a question; is the juice made by a blender costing 36 times more than a cheaper one, any better?  Hmm, the virtues of blender technology, robustness and efficiency could be debated in a future, exhilarating article, maybe. But for now, our attention is on this one, the repair of an Optimum 8200 Blender.

The reason I mention the huge price range is that prices for spare parts also vary wildly too.

Make and model: Optimum 8200 Blender

Fault reported: Leaking, noisy, crunchy, horrible

Cost of replacement: £300.00

Manufacturer support:  5/10

Cost of parts: £18.95

My repair time: 1.5 hours

Tools needed: Screwdrivers, test meter, heat shrink, soldering iron etc

Sundry items:  paint, contact cleaner

Cleaning materials: Bleach, bicarbonate of soda, washing up liquid, car polish

Repair difficulty: 3/10

Cups of tea: 2

Biscuits: 2 X custard creams

I received this blender with a broken drive coupler/ socket (the bit that transfers the power to the blades in the jug) and a rough, leaking blender jug.  This high-mileage kitchen appliance had been used until it would work no more.

Upon taking the blender into the workshop, I suggested to the owner that ‘it must have been sounding rough’ for a while… There then might have been a small admission of guilt.

Now, I realise that I’m unusual.  I regularly service my vacuum cleaners, sandwich toaster and kettle and I know that this isn’t normal, so my views on machine maintenance are a little outside the bell curve.

The owner had done her own research on repairing her blender.  She’d located a spares provider and had identified the parts required, to get the blender back making smoothies, which is more than many folk do.  The trouble was that the total amount for all the new parts required, was more than the price of a reconditioned unit.  This is often the case as some reconditioning agents have access to cheaper parts, not available to regular punters, through economies of scale.  To make this repair financially viable, I was going to have to work smart.

As mentioned earlier, blenders vary widely in price and there are established names out there that command a high price.  However, look beyond the logo and things are a little greyer.  Badge engineering, colour and subtle style changes can literally add hundreds of pounds to the asking price for the same basic machine.  This is nothing new.  Manufacturers have been sharing designs and production since the dawn of time and when it comes to buying spares for an expensive machine, there can often be a cheaper route for good quality alternative spares that are compatible, intended for the cheaper variation.  The skill is knowing where to look.

This slideshow requires JavaScript.

A picture paints a thousand words as they say and the slide show above shows the stages that I went through with this repair.

Using the original parts listed for an Optimum 8200 blender, the best deal the customer and I could find was:

  • Replacement drive socket, £39.95
  • Replacement blade and bearing, £69.00
  • Tool for blade removal, £11.99

Total, £120.94 (more if you want speedier delivery). Source:  froothie.co.uk

Shopping around for alternatives…

  • Replacement blade and bearing, £18.95 for a Vitamix blender (Amazon.co.uk)
  • Repair to existing drive socket (I drilled and tapped a new grub screw), £ my time
  • I used a tool I had already to remove the old blade (a plumbing bracket) so no need to buy one

Total, £18.95, plus my time

I chose a Vitamix blade as I noticed that some Optimum and Vitamix blenders shared the same jug design.  I actually saw the blade assembly for £7.99 on eBay, but decided that the warranty offer on Amazon.co.uk, was a better deal.

Now, I know I haven’t been that scientific here, but one suspects that there is little or no difference in blender blade robustness and all the ones I’ve ever seen to date contain the same bearings you might find in a scooter or skateboard.  I suspect that the blade assemblies are all made in the same factory, somewhere.

My guess here is that the aftermarket parts supplier must charge a comparitively high price for some items to:

  • Cover staff and site overheads
  • Provide a sense of reassuring expense compared to the original purchase price
  • Potentially recover a high charge from the manufacturer

The trouble with this strategy is that many domestic appliances are worth little once unwrapped compared to the original ticket price.  The comparative high prices for aftermarket parts would likely in many cases, put a customer off doing the repair at all.  The customer then weighs up the cost of:

  • Finding someone to do the repair work
  • Doing the repair work themselves
  • The price of parts
  • The price of labour

Often, when added up, it’s cheaper to replace, rather than repair which in my opinion, not the way to go.

As a repairer, the statement I’m always grappling with is:

Value Repair ≤ Replacement Product Purchase or simply: VR ≤ RPP

So, when someone brings me an item to repair, I’m always looking for:

  • An overall repair that costs-in for the customer, encouraging the customer to keep the existing machine for longer, saving it from the dump
  • A repair that’s likely to be reliable in relation to the condition of the machine
  • An upgrade to the original design (where possible) taking advantage of the innovations or modifications to the original design that enhance longevity or performance

It’s a careful balancing act and one that doesn’t always work first time, but that’s the challenge!

I’ve gone a little off subject but it all relates.

Back to the blender, I saved the customer money on the purchase of a new appliance, saved money on a potential repair elsewhere and saved the broken blender from the chop.  The customer was happy.  As with all items I receive for repair, I also cleaned and polished the blender to make it shine like new.

 

Footnote: The repair was over, or so I thought.  A week or so later, the customer contacted me again to tell me that a new fault had started.  Speed control was now a little erratic and was making the blender hard to use.  I said no problem and agreed to have a look.  Likely to have happened during my repair work, a small lead on the printed circuit board had become loose.  A quick tighten up and normal operation resumed.  Phew!

 

 

Swan tea urn off the boil

A cheap fix gets this essential tea making machine back in business…

I admit it. I do get some satisfaction when I divert an appliance, on a journey to the bin, to my workshop for repair.  I have been known to collect the odd item from skips or just dumped on the pavement while supposed to be doing something more productive. I think I just feel sorry for things. Weird, but true.

Make and model: Swan Hot Water Tea 20L Urn

Fault reported: Not staying hot

Cost of replacement: £80ish

Manufacturer support:  3/10

Cost of parts: £1.70

Hours spent on repair: 45 minutes

Tools needed: Screwdrivers, test meter etc

Sundry items: Cleaning materials, heat transfer solution

Repair difficulty: 2/10

Cups of tea: X1

Biscuits: Malted Milk X1

This Swan hot water tea urn was one of those items.  Spotted during an office reorganisation in the ‘scrap pile’, it had been put there as it wasn’t working properly and a new one had now been ordered.

IMG_20200621_214203
FixItWorkshop, Worthing, July’20, Swan Hot Water Urn… shiny!

 

Being fairly light-fingered, I spirited the urn away to the workshop for some tinker time.  Not strictly staff policy, but you know, seek forgiveness after etc.

An urn is really just a big kettle.  This one has an all metal 20 litre tank with bar-style tap to brew up, when needed.  There are no real controls as such; just an on/off switch with neon light and two tell-tail lights to indicate boil and keep warm.  Keep warm is usually on all the time when switched on.

The fault seemed to be that the urn reached boiling temperature when switched on, but then switched off totally, allowing the water to cool again excessively.  Timing the switching intervals of the thermostat, 20 minutes or so, and a 15-200 hysteresis confirmed a fault. There was also no ‘keep warm’ green light on, when in use.  To push the thermostat further, I poured cold water into the urn to see if that sped up switching between hot and cold, it didn’t.

Opening up the urn’s base involved just three screws, allowing access to all components.  Such a nice change to not have layers of covers and things to move out of the way first!

Checking the wiring out for logic revealed that someone had been here before! The wiring was incorrect and the ‘keep hot’ element was not wired up correctly and effectively not in circuit with the power source. A small wiring change corrected this and meant that the ‘keep warm’ element was now working again.

The thermal reset fuse/ button seemed to be working OK- proved with a test meter and the thermostat did seem to switch on and off, albeit with excessive hysteresis.  Time to fit another one! Luckily, these thermostats are very common and I managed to get one from eBay, rated at 1000 (a couple of degrees over the one fitted) for less than £2. Fitting a new thermostat only involved a couple of screws, a light smear of heat transfer solution and reconnecting back into the wiring harness.

This slideshow requires JavaScript.

With all wiring back in place and the cover refitted, it was time to test and brew up.  This time, the urn boiled, switched off and then stayed warm on the secondary ‘keep warm’ circuit.  To prove that the new thermostat was an improvement, I then topped up the urn with cold water and within 5 seconds, the thermostat clicked in and the boiling process started again.

Time for a brew.

(PS, the urn has now returned to its normal place of work)

Dinner will be served in a flash…

A Tulip A350T Electric Rice Cooker is repaired

IMG_2609
FixItWorkshop, Worthing, June’20, Tulip A350T 12Y1EI (to be exact).

I particularly enjoy receiving something to fix that I’ve never come across before.  Indeed, I’d never used an electric rice cooker, let alone heard of Tulip, the manufacturer of this example.  To be frank, I haven’t often thought about the popularity of electric rice cookers in general as an additional labour-saving device in the kitchen.  Clearly, I must be slipping.

This actual machine was a family treasure, which had moved around a bit and had originally been purchased in Holland and had since been converted from using a standard Euro plug to IEC/ kettle UK mains plug at some point.  All very interesting you say (maybe), but how did it end up in my workshop?

Make and model: Tulip A350T Electric Rice Cooker

Fault reported: Not working

Cost of replacement: £30

Manufacturer support:  0/10

Cost of parts: £2.00

Hours spent on repair: 1 hour

Tools needed: Screwdrivers, test meter, heat shrink, looped crimps etc

Sundry items: Cleaning materials

Repair difficulty: 3/10

Cups of tea: 2

Biscuits: Custard Cream X 2

After many years of reliable service, poor old ‘Tulip’ decided it had had enough of boiling up pilau rice and assorted vegetables and conked out.  When the owner tried to switch the cooker on, nothing happened, no light, no heat, no hope.

Most people would then usually have thrown in the towel, reached for their phone and within a couple of clicks, bought a new one on Amazon to be delivered the next day.

Perhaps it was the thought of poor old Tulip being crushed in the scrap metal pile at the tip which made the owner go online and find my website of strange domestic appliance tales instead of Amazon*…  But I’m glad they did.  *other online electrical retailers are available!

The machine is basically a large kettle with a removable bowl that holds whatever you wish to cook.  It has a thermostat for temperature regulation, a switch to change modes (cook/warm) and a safety cut-out mechanism, should something go wrong.  It was this safety system which had operated and caused the machine to fail-safe.

The design of the machine is quite simple, dare I say crude in places.  Within a few minutes, I had removed the base, exposing the wiring, switch, thermostat and other gubbins.

The earth bonding cable had melted which was the first alarm bell to ring.  Digging a little closer, the main issue revealed itself.  The heat-proof insulation on the ‘over heat’ one-shot thermal fuse had shorted out via a cracked piece of wiring on the metal casing of the unit.  Surprisingly, this had not overloaded the main plug fuse, but had heated the thermal fuse and had blown that instead.  Flash-bang, kaput.

The cooker’s switch, thermostat, element and other wiring checked out OK, so it was now worth fixing the failed system.

After purchasing a suitable replacement thermal fuse for a couple of quid, I set about installing this in place of the failed one, taking the time to upgrade the wiring harness with heat shrink to avoid a short again in future.  I removed the damaged earth and replaced it with fresh wire, securing it on to a better earth-bonded location and after some careful wire re-routing and fettling, the base of the machine was ready to be re-attached, ready for testing.  With the cooking bowl full of water and power applied, the ‘cook’ light lit up and the machine started to work.  Utter joy.  After a few cycles of heating and warming, I was satisfied that my work was done.

This slideshow requires JavaScript.

Even though this device wasn’t marked as such, it’s a metal bodied Class One device here in the UK and ideally required a thorough integrety test of the safety system.  Using my newly-acquired Megger PAT150 tester, I was able to prove that the machine was compliant with current UK legislation for Portable Appliance Testing.  Ricely done.

 

 

 

Fetch me a coffee Parker… Yes Milady!

A Gaggia Milady gets unblocked

Despite various warning labels and advice from manufacturers, sometimes it’s better to ignore official advice and just dive in, especially if something has stopped working altogether.  Gaggia coffee machines of this vintage are well supported by various online parts suppliers, so when your machine stops making the perfect brew, the chances are that it can be sorted out with a little know-how…

Parker
FixItWorkshop, Worthing, June’20 Aloysius Parker from Thunderbirds (picture from Wikipedia)
IMG_20200525_181240
FixItWorkshop, Worthing, June’20, Gaggia Milady.

I couldn’t resist a reference to one of my favourite childhood programs…

Make and model: Gaggia Milady Coffee Machine

Fault reported: No coffee/ blocked group head

Cost of replacement: £300 (approx.)

Manufacturer support:  3/10

Cost of parts:  £0, inc. carriage

Hours spent on repair: 1 hour

Hours spent on finding parts: 0 hours

Tools needed: Screwdrivers, spanner, pliers, drill, tap set

Sundry items: Silicone spray, WD-40, water safe silicone lube, cleaning materials

Repair difficulty: 4/10

Cups of tea:  X 2 (and one coffee for testing purposes)

Biscuits: None (Ice Cream X 1)

Someone got in touch to see if I could repair their much loved Gaggia Milady, after receiving some unhelpful advice from the UK distributor.  A new Gaggia had already been purchased, but the owner was missing the ‘solidness’ of his original machine and wanted it back working again.

Fault reported:  Heater working, pump running, no water at all at the group head, therefore no coffee.

Opening the machine’s lid reveals lots of cables and pipes, so if you’re attempting this repair yourself, I recommend making notes and taking photos, carefully marking the location of all the positions.

I suspected a blockage from the boiler to the group head, as sometimes happens with older machines, as scale builds up on the inside.  In cases like this, de-scaler is usually no good and more drastic action is required.

Removing the boiler on this model is similar to many other Gaggia machines, the only variant differences usually being cosmetic.  Just four screws usually hold the boiler to the cabinet.  I suspected that there was a blockage between the boiler area and valve to group head ‘jet’ and in order to access it, a few layers of metal work needed to be removed.

 

This slideshow requires JavaScript.

Just one screw holds the strainer, but removing the head involves removing two bolts, which secure two halves of the group head.  The trouble is that over the years, corrosion makes the two halves ‘weld’ together and the only way to split them is to use a little ingenuity.  Fortunately, there are four water holes in the head which make ideal leverage points and with a small M5 tap, those holes become anchor points for the two bolts holding the head together.  Winding those bolts into the new threaded holes forces the two halves apart…

…Revealing the brass valve base.  Using a 10mm spanner releases the valve’s spring and valve rubber.  In this case, it was full of scale and debris.  A thorough clean using WD40, wire brushes and wire wool and the group head was ready for reassembly.

All surfaces scrubbed, all rubber seals cleaned and treated to some water-safe lubricant, the group head back together, the boiler was ready to be re-installed into the machine.  After some careful re-plumbing and re-connecting, the machine was ready for testing.

Just one more job.  Make the coffee for Milady!

Another machine dodges the tip with only a small tin of elbow grease used. F.A.B!

Atco Consort 14 (CT14) self-propelled lawnmower repair

A mid-90’s take on a classic design, dodges the tip

When they say; “they don’t make things the way they used to”, they’re right… sadly.

With many repairs that I do, half the battle is identifying the correct or closest-match replacement part.  Half the fun is finding a part to do the job, when the original manufacturer can’t or won’t sell that part.

IMG_2260
FixItWorkshop, Worthing, May’20, Atco Consort 14 (CT14)

Make and model: Atco (Qualcast) Consort 14 (CT14- 002107A)

Fault reported: Intermittent running

Cost of replacement: £300 (approx.)

Manufacturer support:  0/10

Cost of parts:  £24.44, inc. carriage

Hours spent on repair: 1 hour

Hours spent on finding parts: 1 hour

Tools needed: Screwdrivers, spanner, pliers

Sundry items: Silicone spray, WD-40, cleaning materials

Repair difficulty: 3/10

Cups of tea:  X 1

Biscuits: Custard Cream X 1

Some things are just a joy to work on because of the way the original design and engineering teams that came up with the product, saw their machines being used in real life.

Even though this machine was built in the 1990s, the Consort 14’s DNA comes from a long line of designs that include the famous ‘Suffolk Punch’ lawn mower created by Suffolk Iron Foundries of Stowmarket in 1954.  This machine is badged as Atco (and Qualcast in places) but the electric motor was made in Stowmarket, England.  The original factory had a reputation for making everything, literally everything, for its machines, right down to the nuts and bolts and this ethos lives on in the CT14.

I’m not going to bang on about sustainable design and circular economy here, but today, unless one pays serious money, garden equipment is simply not built to last any more than a couple of years.  Many of the mowers and strimmers you can buy for under £100 in B&Q, Tescos (here in the UK) and alike have a built-in obsolescence factor measured in months, not decades.  Personally, I believe that products like this should be banned.  Too many end up at my local tip with the price label still attached…

This slideshow requires JavaScript.

A neighbour asked me to look at their Atco lawnmower, which had stopped mowing recently.  They were wondering if it was worth bothering with a repair, I of course said that the machine that they had was better than many machines available now, so it was absolutely worth repairing!

The mower is a self-propelled, cylinder type with speed control and clutch to engage the propulsion system, as desired.  It’s a neat design that’s hard to better.  The next time you are at Wembley or Wimbledon, just look at the mowers still used by professional grounds maintenance teams.

The Atco is designed to receive occasional maintenance and all items which might require the owner or maintenance engineer to inspect are easy to access.  Forward thinking again, shown by the designers.  The main issue in 2020 is that parts are only available from aftermarket suppliers and although there are still (thankfully) specialists ready to supply, part numbers and cross-referencing is a nightmare and despite me doing this work in the UK and this machine being made in the UK, the repair required a degree of investigation and sleuth work to get the parts needed.

The motor was my first port of call and with only a couple of bolts holding it in place, the motor was soon removed.  It was in good overall condition but the carbon brushes were a little short and needed replacing. This explained why the motor had suddenly cut-out.

You might think that finding carbon brushes for a UK made motor, might be easy.  You would be wrong.  Despite several conversations with mower experts, these brushes were seemingly unavailable, off the shelf.  I did order some brushes for an equivalent model produced a little later, but these were too large.  I could have filed them down to make them fit, but after rooting around in my collection of brushes (as one does) I found that a new pair of brushes from a Kenwood Chef A701 fitted perfectly.

While I had the mower in pieces, I decided to inspect the drive belts which were both in poor condition.  One was split and one had stretched badly.  For smooth, reliable operation, both required a replacement.

Again, the Consort 14 was not on many mower supplier inventories, so finding the correct belts required cross checking with other Qualcast and Bosch (Bosch later acquired Qualcast) models and a little bit of luck to match them up.  Fortunately, eBay sellers came to the rescue again and I managed to find the correct belts which fitted perfectly.

With the mower back together, it was ready to run for another 30 years.  Time for another cuppa.

Footnote:  I’m very aware that I sound like a stuck record…

Look, many products made and sold nowadays are much better than older ones.  I’m not saying that all old things are better. Take old cars for example (although I have a soft spot for old cars):  They were polluting, they didn’t have safety built-in (in general) they rusted-out and broke down, all the time.  New ones generally don’t break down, last for longer and you’ll walk away from many crash situations.

New things are usually safer, more efficient and capable.  However, many older machines were designed to be serviced, repaired and re-used over and over, which in my opinion, is more sustainable.  Many products today, especially mowers and alike are designed to last for 18 months hard-use and then the whole thing is scrapped, but it’s apparently acceptable to society as it ‘only cost 40 quid- I’ve had my monies worth’.

It’s this notion that doesn’t sit well with me and I see a growing cohort of people who are not prepared to accept this waste of resources either.  What say you?

 

Nilfisk GM80 industrial vacuum cleaner

This ‘vacuum beast’ from the 1960s gets serviced, ready for today

Sometimes big is best and when it comes to longevity, this machine is tough to beat.

I wasn’t born when this machine was made, but good quality designs and engineering foresight, means that new parts fit retrospectively.  Why aren’t all machines made this way?

Make and model: Nilfisk GM80 (large)

Fault reported: Poor running

Cost of replacement: £600-800 (approx.)

Manufacturer support:  8/10

Cost of parts: £14.94, inc. carriage

Hours spent on repair: 1.5 hours

Tools needed: Screwdrivers, test meter, soap and water etc

Sundry items: Silicone spray, WD-40, cleaning materials, wire wool

Repair difficulty: 3/10

Cups of coffee:  X1

Biscuits: X2 Chocolate Hobnobs (that don’t dunk that well in coffee, truth be told)

Recently, I got the opportunity to tackle an industrial vacuum cleaner in need of a proper service, which had been in continual use since the late 1960’s.  Judging by the condition it was in when I first received it in the workshop, I doubt that some parts of the machine had received any care since its first day at work.

The machine in question is a Nilfisk GM80 (large).  It’s a ‘large’ as it has a milk-churn sized base to it, which means it can swallow a lot of dust.  The large base has long been discontinued, but you can still buy the current smaller base, should yours be damaged.  Indeed, the Nilfisk GM80 range of vacuum cleaners are all quite modular and feature different levels of filtration, depending on the specific environment they are put to use in.  This means you can easily swap parts from donor machines to keep older machines going. The design means that parts seldom go obsolete, new parts just get improved and fit older models.  Great news for sustainability.

Back to the machine in question.  It had been covered for many years under a service contract, but for whatever reason, that company were no longer taking quite as much time as they should and applying as much care with each inspection.  This ‘serviced’ machine had recently had a new motor (hence later model motor housing) but the basics of vacuum principles had been overlooked.

I won’t go into the repair blow-by-blow, so here’s a summary of the work completed:

  • clean of all rubber seals and mating surfaces, essential to avoid air leaks
  • check and adjust all housing clips and adjust as necessary (all of them in this case)
  • wash motor diffuser (this had been changed within the last year)
  • wash main cotton filter (this had never been done, it was so clogged)
  • wash motor intake filter
  • check condition of motor brushes and bearing end-float (all fine)
  • check and tighten electrical IEC connection
  • inspect flex for damage (all OK)

This slideshow requires JavaScript.

The previous service agent had stated that the damaged hose (original 1960’s rubber item) was now unavailable and that a replacement was impossible.  Impossible eh?  That’s two letters too long.

Upon taking the old hose connectors apart (and removing layers of gaffer tape), I discovered that the internal diameter was similar to a Nilfisk-to-Numatic aftermarket adaptor and with a little adjustment, this 1960’s Nilfisk machine could be made compatible with Numatic’s vacuum cleaner hose design, which is much more abundant, here in the UK.  So, with a little jiggery pokery, this machine is ready to work for its living, once again, with a shiny new hose.

So yet again, when an ‘expert’ tells you that something cannot be repaired, don’t necessarily take their word for it.  A second opinion can sometimes save you time and money.

The repair didn’t break the bank either and I have since taken on more machine service work for this organisation.

Touch control lamp repair

An old lamp sees the light…

You’ve got to be in the mood for certain repair work.

A friend of ours dropped in a ‘dead lamp’ to the workshop with a message:  “Matt, can you mend it”?  I then sort of forgot about it for er, nine months.  Whoops.  I need to focus on the workshop more.

The lamp was much loved by its owner and its current lack of light was leaving her in the dark.

IMG_1732
FixItWorkshop, Worthing, May’20, Endon Touch Control Dimmable Lamp.

Make and model: Endon Touch Control Dimmable Lamp

Fault reported: Not working

Cost of replacement: £30ish

Manufacturer support:  0/10

Cost of parts: £3 approx.

Hours spent on repair: 30 minutes

Tools needed: Screwdrivers, test meter etc

Sundry items: None

Repair difficulty: 2/10

Cups of tea: 1

Biscuits: Wagon Wheel (Jammie)

These touch lamps were a bit of a novelty back in the day and seem to have fallen out of favour in recent times.  However, the owner of this one was a bit upset when suddenly one day, it wouldn’t work.

When working on anything mains operated, I always start with the basics:

  • Is the bulb working? Yes.
  • Is the mains flex OK?  Again, yes
  • Is the fuse (UK) intact? All OK

Lamps like this are pretty simple; there’s a mains wire, there’s a bulb and holder, a switch and the main lamp unit itself.  Some dimmable lamps, like this one, feature an electronic dimming module, which in this case was built into the base of the unit.

First step:  Remove the base cover

Removing the cover was fairly straightforward and only involved a few self-tapping screws, under the felt pad base.  This exposed the dimmer module, which when tested with the meter, was not outputting any current to the lamp circuit.

Second step: Dismantle the dimmer

Dimmer modules like this are not designed to be repaired and contain no user-serviceable parts (don’t get me started on that!).  But in the past, I’ve had some luck cleaning components and re-heating the odd dry joint with a soldering iron.  In this case, it was no joy.  A replacement module was needed.

Third step:  Find a new dimmer!

I can’t remember what I used to do before finding specialist electronic suppliers on eBay and alike.  Oh yes, I just remembered:  I struggled!

It didn’t take long to find a new (almost identical) dimmer module on eBay for about £3, delivered.  How do they do it for the money?

After 2 weeks of waiting, the new module arrived in the post, hand delivered by our usual friendly posty, Keith.

This slideshow requires JavaScript.

Forth step:  Fitting the new module and test

Comparing the dimmers side-by-side revealed that they were more or less the same, using the same wire colours…but in a different combination.  This meant that it wasn’t a simple ‘cut and re-join’ the new dimmer to the existing wiring.  Oh no, it meant cutting everything out and starting again.  Still, with only four wires, it didn’t take long.  With a little soldering and heat shrink, one would never know I had been tinkering.

A good job, jobbed, even if it did take me months to get ‘aroundtuit’.

Quite literally illuminating.

 

Magic Lamp

Rub the lamp release the genie, make three wishes (make ’em good)

IMG_20200206_210036
FixItWorkshop, Worthing, March’20, Dimmable Projector Lamp

I’d say that 8 out of 10 repairs commissioned by folk who get in touch are for sentimental reasons.  Take this unusual lamp.  It’s not worth a great deal of cash, it doesn’t use the latest luminescence technology and it doesn’t even have a makers’ mark (we think it came from Aldi or Lidl).

Yet, it had been a family favourite for years and the owners were keen to see it light their world, once more.

Make and model: Dimmable ‘projector ball’ lamp

Fault reported: Not working

Cost of replacement: £30ish

Manufacturer support:  0/10

Cost of parts: £15.30 plus £3.25 for bulb

Hours spent on repair: 1 hour

Tools needed: Spanner, screwdrivers, test meter etc

Sundry items: None

Repair difficulty: 2/10

Cups of tea: 2

Biscuits: 1 Gold Bar

Firstly, we all make mistakes and here’s one of mine!

It’s easy to fall into traps or ‘snap diagnosis’ when doing a repair and I want to share a ‘little accident’ that I had with this one.  Even an experienced repair bloke can make mistakes.

Here goes.

After checking the mains plug (all fine) and cable to the lamp for continuity and potential shorts to earth, I was convinced that the supply lead was fine.  All good so far.

Next, I checked continuity from the dimmer module to the lamp socket.  Ah ha, that’s the problem, that link in the circuit is dead.  A quick repair job, on to the next?  Not quite.

As a temporary test, I decided to by-pass the dimmer and rig a temporary wire to the lamp, to prove the wiring was OK and that the dimmer was the fault.  Upon plugging the mains plug in, the bulb nearly exploded.  Bang!  My safety circuit breakers then stopped the power to the whole workshop.  I was now in darkness, but luckily, my heart was still ticking.

I had failed to realise that the dimmer on this light was actually doing two jobs; dimming the lamp as well as stepping down from the (UK) mains 240VAC supply to a safer 12VAC operating power.  I had connected 240 Volts to a 12 Volt bulb!  What a simple mistake to make.  If I had simply inspected the dimmer more closely, I would have realised this.  The original sticker and badges on this lamp had long disappeared.  An important lesson, relearned.  Time for a cup of tea and a biscuit.

The repair.

With the power back on, it was time to see what the original dimmer was doing.  Not much as it turned out and due to the tininess of the dimmer’s components and build type, I was unable to say why it had failed.  I suspect that one of the power sink control components (maybe a Zenner diode) had failed, causing an overload to the onboard one-time blow fuse.  However, that’s just an unproven theory.  The fact was that I now needed a replacement dimmer with step-down 240/12VAC capability.

This slideshow requires JavaScript.

It turns out that only a couple of manufacturers make such a dimmer module and I chose one made by Relco as it seemed to match the original specification quite well.  It would have been tempting to convert the lamp to mains power and just fit a simple on/off switch, but I’m not keen on this as technically, the lamp would need to be re-subjected to British/ EN Standards, not something I was prepared to do.  Unless impossible otherwise, all kit leaving the workshop must be original specification or better.

With a new (correct) dimmer wired-in and replacement MR11 bulb fitted, the lamp came to life once more.  I’d also fitted a proper mains on/off switch, since the replacement dimmer did not have one.  The new switch would isolate the flow of power to the whole thing when not in use, hopefully prolonging the life of the dimmer module.

The owners of this lamp were very pleased to have it back as they had missed the lovely light patterns it projected on to their ceiling.

Micro Mini Scooter tune up

A Micro Mini Scooter gets a little TLC

IMG_0983
FixItWorkshop, Worthing, March’20, Micro Mini Scooter.

I like Micro scooters and I would have loved one when I ‘were a boy’.  My daughters have them and they love zipping along the pavement on them to school.  The scooters handle well and are well screwed together.  They are also well supported from a spares point of view, so I like them even more.

Make and model: Micro Mini Scooter

Fault reported: Back wheel stuck

Cost of replacement: £55

Manufacturer support:  7/10

Cost of parts: £2.00

Hours spent on repair: 30 minutes

Tools needed: Cleaning tools/ cross-head screwdriver/ Allen keys

Sundry items: Silicone spray/ cleaning rags/ PTFE spray for steering

Repair difficulty: 2/10

Cups of tea: 1

Biscuits: 1 custard cream

The scooter in the picture belonged to my friend’s son who’d taken it through one too many puddles I think, as the rain water had taken its toll on some of the scooter’s moving parts.  Over time, the rear wheel’s bearing had suffered excess water ingress, had rusted and had seized.  I’m always amazed at how ‘stuck’ things can get with only a small amount of rust.

This slideshow requires JavaScript.

In their wisdom, Micro have decided to fit their products with generic bearings commonly fitted to skateboards, roller boots, bikes, cars, photocopiers etc, which means that replacement bearings are a doddle to obtain.  I bought some upgraded bearings with better water seals for under £10, so I know that the repair will last longer than the original equipment fitted from the factory.

The front wheels were seemingly fine, so I left them alone. ‘If it ain’t broke, don’t fix it’.

On this model, the rear wheel comes off with one Allen key bolt holding a retaining a stub axel, which slides out with a little persuasion.  The bearings just pop out of the wheel using a small screwdriver as a lever and before fitting new equipment, I always clean the area first to ensure that no dirt is trapped, which could cause premature bearing failure in future.

With the new bearings in, stub axel refitted, a quick wipe down with a strong cleaning wipe, a little PTFE lube applied to the scooter’s steering mechanism and it was ready to see another day.

Bonza.

Horray for Henry!

A Numatic Henry vacuum cleaner gets the kiss of life…

IMG_1545
FixItWorkshop, Worthing, March’20, Numatic ‘Henry’ vacuum cleaner HVA200a (to be exact).

There are times when only no-nonsense suck will do.  Other vacuum cleaners offer the moon on a stick, but rarely live up to the repeated abuse of everyday life.  Henry on the other hand is tough, no-nonsense and above all, reliable.

Reviewers of this kind of thing, seem to agree.

Make and model: Numatic International ‘Henry’ vacuum cleaner HVA200a

Fault reported: Dead/ not running

Cost of replacement: About £130, give or take

Cost of parts: £17.25

Hours spent on repair: 1

Tools needed: Cleaning tools/ cross-head screwdriver

Sundry items: Silicone spray/ cleaning rags

Repair difficulty: 2/10

Cups of tea: 1

Biscuits: 1 bourbon, I think

I have friends in trades who will only buy and use Henry ‘hoovers’ as they last, always work and are easy to use. And above all, who doesn’t like an appliance with a smiley face?

The example in the picture above had been used by a local Worthing taxi driver everyday for the last 15 years without any problems and was in pretty good nick.  The filter was clean and apart from some wear and tear scratches, still looked like the current model.

One day, Henry failed to switch on and after the owner had checked the fuse in the plug, he decided to get in touch with the workshop.

IMG_1546
FixItWorkshop, Worthing, March’20, Henry’s on switch.

The HVA200a has two speed settings, one at 600 Watts power and one at 1200 Watts power, selectable by a red switch and indicated in a red tell-tail lamp.  When plugged in, nothing was happening.

Time to perform surgery.

Opening up Henry’s casing was straightforward and top marks to the designers for creating sensible parts that fit together logically.  Henry is designed to last and be repaired.  All very pleasing.

This slideshow requires JavaScript.

With the lid removed, all electrical checks were made from the plug to the end of the flex, down to the motor.  The flex was in good condition with no snags, shorts or earth faults.  The cable winder on this model is a simple handle operating spindle and was a bit sticky.  The contacts inside the gubbins were also tarnished, so while it was all in pieces, I decided to clean all of the electrical contacts with cleaner and make sure all the sliding parts of the cable winder were clean and had a small dab of silicone spray for smoothness.

Testing for current around the circuit revealed that the speed control board was where things stopped.  The speed control board was dead and required replacing.

To prove this fact, I was able to temporarily by-pass the controller and connect the mains switch to the motor, which revealed that the motor was strong.

A quick bit of shopping with my favourite parts suppliers yielded a replacement (updated) speed control PCB for under £20, which seemed like good value to me.  After making a note of the wiring (see slideshow), the new PCB was connected up, the casing back together and Henry was ready to run, once more.

I also decided to give Henry a little polish too, just because.