Construction workers used heavy machinery to demonstrate that legislation to reform working conditions in Japan's construction industry will start in 2024.
@@やすいしおり-b2v maybe. If you remove the cover what is it using? Surface mount components? I assume it is. I fixed my 5.1 surround sound system with the help of an electrical engineer. I've only been in electronics for over 1 year. It's a hobby for me. I barely understand electronics yet I buy SMD to assemble. These tiny components require a microscope, tweezers, fine soldering iron and special gel fluxes to assist in soldering to the PCB. I have have a very basic knowledge of electronics still I try to understand the mystery of electronics. Sometimes I can fix things sometimes I'm absolutely clueless. To fix devices you must know how to diagnose components like resistors, capacitors, transistors, and ICs. I can run some very basic tests using a multimeter and other tools. I need more tools to assist in this diagnosis like a FLIR which detects excessively hot components which in itself may not find the particular component that is faulty but it may. It just depends luck to some extent. Without proper training and education may never fully understand the intricacies of electronics, circuits and the laws of physics. Sometimes you can see obviously faulty components other times its very difficult if not impossible to determine which component or components are faulty. Also you need new components which may or may not be readily available. I guess electronic technicians use alternative components which are similar but not the same. If the printed circuit board is cracked I guess it could be repaired but then maybe it's too expensive to fix. Maybe the push buttons are worn out? Capacitors apparently are one of the earliest components to fail. If you look at the pcb with all the components and you see obviously leaking capacitors then yeah I would replace them with new capacitors of the same ratings voltage etc. Still who really knows what the problem is. It could be any component or multiple components or something simple. 🤔 When I repaired my 5.1 surround sound system I with the help of my electrical engineer friend worked out what it was. As it turned out it was what is called a full bridge rectifier. A "rectifier" converts AC current into DC direct current. Well for some unknown reason this particular component failed. Fortunately with the help of my friend O was able to fix this problem by replacing the RECTIFIER. Later this same component failed again. So again I replaced it with a new one. I also bought another component which is an in rush current suppressor. I have no fitted it yet but in time I will. I don't know what to say to you sir. I wish I could fix it for you unfortunately I live in Australia but I also lack the knowledge to be able to accurately and professionally find and diagnose electronics. I guess most would simply throw the remote away and get a new one because the old one is too expensive to repair. No doubt a fully qualified electronics engineer or technician is highly paid professional and on a very good salary. I unfortunately do not really feel qualified to assist you sir. Sometimes I fix things or I try to fix them and break them. This happened to me recently when I fixed and then broke my old vacuum cleaner. I left a part out and later discovered this bad mistake. When I removed to cover my hand slipped and the vacuum cleaner fell over and broke a critical part. I repaired the part with super glue and patience still it was sloppy and unprofessional. Anyway sorry I cannot help you sir.
@@やすいしおり-b2v oh sorry sir. You said it is the unit itself. Wow! That is most interesting because this is the same problem that I also have. Whilst trying to discover the problem with my surround sound system (not working because of the rectifier) I disassembled the pod which is the control module or the part that displays the volume, and the type of SS modes. It has a window with LED and a large volume knob with an of and on button. I removed the enclosure to reveal a very complex printed circuit board with hundreds of tiny surface mount components. I looked at one side which had many leaking small aluminium capacitors. After making a list of faulty caps I ordered them and later received them in the mail. One by one I replaced each of the capacitors. I do not know whether I fixed anything because that wasn't the real issue. My remote control had corroded terminals because the batteries leaked. I cleaned to remote control as best I could but the chrome is eaten away with acid. What I discovered is that the remote control handset only partially works. I can increase and decrease the volume no problem but I cannot turn the power off. Obviously there is something else that's faulty within the unit or the control pod. Trying to determine what's wrong with it is difficult because the components are "in circuit". Whether I'll be able to fix this problem remains to be seen. Not an easy fix. 😕 Still who really knows. I might buy a FLIR and use it to try to determine if there are any hot components. Still that may or may not assist in diagnosising the faulty component/s. Wish me luck. One day I shall attempt to fix it again. Take care sir.
Hello again sir ! I dont fully understand what you did to fix the humm in your audio. Would an X2 suppression capacitor help? It looks like maybe you solved the issue anyway.
Thank you for your comment By changing the wiring of the signal input path, the noise has been reduced to an acceptable level. The underlying cause remains a mystery.
@@nn2000 what is the moral of this story? Nothing ventured nothing gain ! No pain, no gain. Yes I was talking to my friend the other day and said the Japanese have a saying : "If you haven't made at least 9 mistakes in a day you're not trying hard enough." 😆
@@nn2000 I like these saying ! And thanks for sharing sir. I like your tda7294 build and it was interesting to watch you build it and the modifications that you made. I didn't fully understand everything you did but I very much liked the look of your amplifier. For example the modification to resistance to increase the brightness of the LEDs. I must say the way you photograph your tda7294 build and how your carefully describe what parts you used and how you built it is wonderful. I love the Japanese culture. I'm a lover of your beautiful Sakura trees. 🌸🌸🌸🌸🌸🌸🌸🌸🌸🌸🌸 I have a beautiful ornamental Japanese Apricot tree which has just blossomed. The fragrance of the flowers is like perfume. 😊 Anyway thanks for your reply sir.
@@nn2000 My friend uses a X2 suppression capacitor in front of his bridge rectifier then 10 caps on perf board. Apparently the X2 suppression capacitor reduces noise and interference in analog signals or that's what I think it does. I remember your issue with noise or interference and wondered whether an X2 suppression capacitor would help or fix your problem. 🤔