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Sony AC-L10 replacement Adapter Fix/repair
Don’t buy a cheap replacement power supply! – YouTube
Not only it generates RF airwaves and induces a lot of unwanted interference in your home Power net, but makes it also impossible to use your original Sony 8mm ccd-trv3e-trv13e,trv23e,trv45e,trv55e,trv65e,trv69e,trv75,trv715 videocamera because of the disturbances present in your precious videos.
But here is the solution to what you can do as a repair engineer to fix that horrible badly interference generating Power Supply so it functions as an original Sony Power Adapter like it is supposed to !!
Open up your not original device with a screwdriver and look at the primary side of the SMPS pcb. Probably you’ll see that on the Primary side some components were left out. Like the Common Mode Choke Inductor Filter. That is most likely just replaced by two wires were the 2 coils should have been. And also the Filter capacitor isn’t there either.
So what I did was remove the 2 wires and replace them by following Common Mode Choke Filter Inductor. The bigger the coil, the bigger the current through your Power Adapter can be. But a bigger one that your original pcb doesn’t let you insert is simply not possible and no need for either.
And next thing I did was insert the special X2(!!) 275 VAC Safety Capacitor that also was missing in the primary of the Power Adapter circuit. (It is most likely directly connected onto the AC Power Input lines Phase and Neutral to short circuit any Interference generating Signals from injecting back into the Power Net).
Next picture shows you how such an as filter capacitor used safety Capacitor looks like.
(There are also even more special and probably more expensive safer Capacitors that also contain a Fuse breaker circuit inside, but I guess we normally do not need these here).
After I fixed the replacement Sony AC-L10A,B,C Switching Power Adapter (my Brother lost his original Sony Adapter because someone presumably took his original one) the Videos were free of any artifact finally !
My brother previously only could copy his 8mm homevideos to his pc by using just the Battery on his Camera. His AC-L10 Adapter was therefore previously only useable to charge his Camera Battery with it. Unlike the original Sony Power Adapter that probably is well filtered AND also has a short circuit protection. But it is however still uncertain if the not original Adapter doesn’t.
The secondary side of the Replacement Adapter had one Filter Coil so it had some Filtering. But I also added a small 0.1uF capacitor over the output just to be sure any generated HF switching component would stay out of the Camera DC input voltage. Of course the Adapter case afterwards was glued together, so it was safe and I use Super glue Gel for this as I have mentioned in one of my previous articles before. That glue just doesn’t drip and also glues very fast too!
Please click on the schematic to enlarge it
But surely after this great fix the Replacement Power Adapter for the Sony CCD-TRV69E Camera worked like a charm, and my brother finally could use his Camera even if the original Camera Battery was empty.
Albert van Bemmelen, Weert, The Netherlands.
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P.P.S- Note: You can also read his previous repair article below: