I often get asked to work on rack-mounted synths. Unless they are very early units I have to turn them away as without factory extension cables (which I do not have for any model) you can’t get the crammed in cards out on the bench in order to work on them. I this post you can see the amount of stuff that has to come out in order to perform a simple battery change on a Roland MKS-70.
Timothy is a good customer of mine, and always looking for something different. He scored this vintage Saarang Electric Tambura on Ebay and asked me to get it going. A number of controls had seized, or were scratchy. Some diligent work got it going, and he assures me that the sounds it makes are now correct! The most interesting thing for me, and the reason for putting it in the blog is the construction method. The wooden pieces of the case interlock and hold the transformer, circuit board, etc. in place. It is an extremely cheap way of construction if per hour labor costs are not high.