GrahamH's photos with the keyword: fix

This is one of three amplifiers at the church I go to. I was gathering interconnection information for the whole system so I could make changes to improve reliability in Toowoomba's summer thunderstorm season when I found this had stopped working. I removed it from the equipment rack and took off the cover. There was nothing obvious except the blown fuse in the mains power socket. This photo was taken then. I replaced the cover and took it home for further investigation. At home I eventually decided that the mains power transformer, the circular object with the wires going from it, was probably faulty. I contacted the Australian agent of the manufacturer, Bosch, for circuit diagrams and technical information. They weren't very helpful but did refer me to a business which did warranty repairs for this type of product. The service manager answered some general questions but didn't/wouldn't supply any circuit information. I worked out a likely AC supply voltage but didn't anything on hand to provide it to check that the rest of the amplifier was working correctly. I ordered a replacement transformer anyway with some trepidation. A pleasant surprise was that it was priced comparably with the normal pricing for similar transformers. About a month later the transformer arrived. With the aid of some photos, a soldering iron and some other tools I replaced the transformer and was relieved when the amplifier then worked correctly. I measured a few key voltages and wrote them on the chassis in case there was any further trouble. The amplifier worked correctly when reinstalled in the rack at church. Mouse-over to see some other photos of the amplifier.

My wife can clearly now. December 2015.

This end has the steel wire threaded through the holes where the plastic once went but in the opposite directions as the wire is a little thicker than the plastic. December 2015.

The wire is threaded through the holes where the plastic line used to be. The other end is fixed in place then this end is tensioned and wrapped around the frame. December 2015.

Strip the plastic from a length of twist tie. December 2015.

The support under the lens, a material like fishing line, broke leaving my wife with a problem. December 2015.