Panasonic TX-L32X10B

Unusual for one of these to appear completely dead, I assumed a blown fuse or a power supply failure of some kind. On investigation there was mains getting to the power supply panel but the main relay wasn’t being fired. There was no standby voltage to the main panel so it had to be the standby section of the power supply. I was working blind because, although I was able to download a service manual, there was no ...

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Bang and Olufsen Beocentre 4000

This came in with a loud hum on both speakers, tracked to a leaky electrolytic in the power supply, no outward sign that the capacitor was faulty, I say that because people are quick to say “look for bulging caps”, well they don’t have to bulge to be faulty! So I first tested it on the built in FM radio…only one channel working…great!  Luckily I was able to download the service manual and using a scope work back ...

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Sony HP-211A Music System

I didn’t hold out much hope for this one as it had been in a loft for several years and the turntable wasn’t turning. On inspection I found that the rubber suspension on the turntable motor had perished allowing the motor to drop down on it’s mountings, meaning the jockey wheel was no longer in contact with the inside of the platter. Being 50 years old it was no surprise that the required parts were no longer available ...

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Denon minidisc repair

I bought this for my personal use, good old eBay, would have been good if it actually worked, so I stripped it down and found a leaky 1 Farad capacitor, and that’s all it was, all up and running now, so not so bad after all.

Denon mindisc repair

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Leak 2000 receiver

Had this one in apparently not working, well actually it was but none of the bulbs in the display were working, this was down to continuity on one bulb holder, once that was done at least it looked like it was working. Apart from that it had some scratchy pots which were quickly sorted out and is now running on test and sounding very nice.

Leak 2000 receiver

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DMR-EZ48 Repair

Panasonic DMR-EZ48 repair

I had a couple of Panasonic recorders in for repair this week, this one was the combined DVD and VHS recorder, a very popular machine and definitely worth the effort to repair. It had the U81 fault code in the display, a common fault and one of the easier ...

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Panasonic NV-HD650

I used to repair these videos by the dozen, a very common fault was not loading or ejecting the tape…and if the tape is stuck in the loading tray it makes getting the thing to pieces very difficult. Anyway, there’s a small sleeve on the spindle of the loading motor, it couples the motor to the worm gear, when it splits the spindle just spins with none of the force being transferred to the worm gear. Glueing isn’t ...

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The Sony TC-K81 Tape Deck

I had this lovely old tape deck dropped in for repair recently, my customer had recently bought it and had been told it needed belts, this seemed reasonable seeing as it was built around 1980, he even brought the belts for me to fit. But it was soon apparent that he had had ...

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The Sharp VZ-3150

 

I’ve had a couple of these in for repair over the last year, when working well they’re a pretty good Hi-Fi with a sought after retro vibe.

This one, however, arrived in a pretty poor state, it looked like it had been in someone’s outside shed for the last twenty years, the recessed screw holes in the back of the cabinet were full of debris, not sure what it was though, dirt / spider web or something ...

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Sharp VZ3000

Another Sharp vertical HiFi in for repair, this one in very clean condition. According to it’s owner it had been bought new 36 years ago and then been stored behind a sofa for many years. All the belts needed replacing, the turntable belt was almost in a liquid state and had to be peeled from the platter, all the others…three on the tape deck and one on the door mechanism had lost their elasticity. New styli were fitted ...

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Pioneer SA-6200

I had this one in for repair recently, according to it’s owner it was bought second hand in the 1980’s and has never gone wrong, if only modern equipment was that well built!

It had gone down on one channel and was brought in with it’s tuner which had no backlight to it’s display. The tuner was an easy place to start, apart from a tricky dismantling job the bulbs behind the display were easy enough to ...

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The Bang and Olufsen 1001

A lovely B&O 1001 turntable from the early 70’s I was working on earlier, the beauty is in it’s simplicity, a motor, a very simple mechanism and a tonearm is all it needs to sound superb. And the brown envelope? It was inside the case and contained a wiring diagram, it had never been opened and it proves that companies like this expect their products to go on for decades, and at some point to be repaired.

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Friday 12/10/18

Workshop Day

I had quite a few repairs building up, most of them needing parts fitted, the first two this morning required some really delicate soldering, an AS-15 Gamma Correction chip on a Samsung t-con panel, around 1cm x 1cm with 48 pins, each one smaller than the tip of my soldering iron. This is an ...

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Aiwa Direct Drive Turntable

I was brought this old turntable because it was cutting out on one channel, this was cured by replacing the phono leads, an easy enough job, but another fault was that it wasn’t lifting off at the end of the record. Being direct drive there are no mechanics under the platter to accomplish this so everything is done with electronics. To sense when the tonearm is at the end of the record there is a lamp and optical ...

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Bang and Olufsen Beocentre 2422

I bought this some months ago with a view to restoring it. I was relaxing in the south of France and just looking through some old hi-fi on eBay, this one caught my eye as it was not far from where I live in the uk and it was going very cheap. Supposedly fully working except for needing a cartridge. Normally that wouldn’t be much of a problem, but in the case of B&O only the original cartridge ...

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Don’t bin it…get it repaired

Of course, I have a personal interest in seeing televisions and other electronic items getting repaired, but consider this:

We are constantly being told to save the planet and recycle, every week I seperate all my recyclable rubbish into paper and card, plastic and glass etc. and feel I’m doing my bit to cut down on ...

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To repair or not to repair?

A very good question, and unfortunately the most common answer these days is not to repair. I’m not sure if that’s because people think tv’s can’t be repaired any more, or they think it will be too expensive, or they think there are no engineers left to carry out the repair. I understand also that a lot of people use the demise of their tv as an excuse to replace it with the latest all singing, all dancing smart tv.

Well ...

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TX-L42B6B, No Start Up

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I’ve had several of these now, refusing to come out of standby. At switch on it’s possible to see the screen light for a split second, sometimes doing this several times before going back to standby. You may need a darkened room to see this. The reason it does this is failure of some of the backlight LED’s, at ...

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Some delicate soldering!

So I had a Panasonic Plasma in for repair, lot’s of short circuits on the Y-Sus panel. A pretty common fault on Plasmas, and not always a viable repair, but after checking the screen for damage, ie blown pixels / tiny cracks in the glass, I decided it was worth a gamble on the repair of the panel.

Not an easy job, the short circuit FET’s ( field effect transistors ) require a lot of heat for ...

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Hitachi 42HXT12U

No Picture (LED failure)

Before going any further, this isn’t intended to be a tutorial for a DIY repair! I regularly get contacted by unqualified people asking my advice, usually when they realise they’re in above their head or have damaged the screen or the power supply. This is merely intended to show that this kind of repair is possible by a qualified engineer!

Depending on the make and model of TV, LED failure can present itself in a couple ...

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Toshiba 40L1333B

This 40″ LED TV from Toshiba seems to be turning up in ever increasing numbers with no picture, either permanently or intermittently. If you talk to Toshiba they will probably confirm that you have a faulty screen, however, that’s as far as it will go, as far as they are concerned screens are not repairable items and the price of a new one would be far more than the price of a new TV.

The problem with ...

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Samsung PS42A457

A PS42A457 Plasma TV. Stuck in standby would be a better description and once again, the customer wasn’t really sure if it would be worth repairing. The standby light was on but there was none of the normal clicking from the power supply relays and no response to the remote or front controls.

Due to the lack of relay activity this was probably, but not certainly, a power supply problem. What the relays do is feed the ...

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Poor Gecko!

Dead Gecko, Steve hill TV servicesWell you see all sorts in this trade but this was a first for me. I’m in touch with fellow engineers from around the world and this poor Gecko was found in the back of a TV in Albania. The TV was wall mounted and should have had a cover fitted where the ...

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Humax PVR-9200t

Problems with Humax PVR'sI was called to this recorder because it was locking up, it would stick on one channel at switch on and not allow any channel change or menu operations until it had been switched off and back on at the mains, even then it would only operate for a few seconds until it locked up ...

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