I jammed my stereo with the recent purchased singles consecutively for hours. The beat from the extended remix was just too hype and it overheats the amplifier until it give way. Was searching around town and lucky to find the exact IC ( LA4905 ), but was told that it has been obsolete and the shopkeeper suggest me to purchase all the remaining stocks from him, well I'm still contemplating whether shall I do so.
This is the faulty IC Amplifier Ready to fix the new IC and not forgetting to apply new heatsink compound. Mission accomplished, my stereo fixed with a new amplifier IC and ready to go!
Ace repair buddy - these really aren't as hard to do as people think I would buy at least 2 spare ic's in case you do the same
Electronics hates heat as explained in the first paragraph of this. http://www.ctmmagnetics.com/the-effect-of-temperature-on-the-life-of-power-electronic-devices/ That is why computer centres spend so much on Air Conditioning. If you can think of any way of keeping the amplifier a bit cooler (a small fan is very effective) then the reliability will be much better. Of course just applying new heatsink compound will probably have helped a bit.
That sounds like a good idea. From experience in building power supplies you don't need a very big or powerful fan to reduce temperatures a lot. I have a Panasonic 5 CD stereo here which was designed with a temperature controlled fan in the back, as do my two DVD recorders.
In an amplifier, the component that susceptible to breakdown will be the amplifier IC either cause by output shorted or life span depending on the usage. For me I used to set to volume at about 60% for my listening. The higher the volume the higher the current will consume by the IC when heat is the next issue.
Hi....I have a subwoofer with a built in amplifier, and recently the amplifier seems to short-circuit and usually blows my fuse almost immediately with allot of electronic noise coming from the amplifier a few milliseconds before. The amplifier that I have is an M-Audio BX10s. I just opened it up and there seems to be something brown has leaked out of the big coil, but has now hardened. turnkey pcb assembly
That is often just glue put there to stop the coils moving around and falling off during transport. https://www.eevblog.com/forum/proje...curing-electronic-components-is-it-necessary/
Soo true! Fixing retro stuff is a whole separate reality Benign PVA (aka Elmer's Glue) used to make caps and coils stay put ages UGLY. ((( I had to find an excuse to use these new emoji introduced today by our Boss @walkman archive )))