How to repair a touch lamp etc.
Most electronic devices that are designed to control voltage levels as in touch lamps which have four levels of control,low, medium, high and off, also light dimmers, speed controllers, temperature controllers etc, use a device called a Triac and when such controllers fail, it is almost certain that it this high current device that has failed, the rest of the circuitry only handle low currents and therefore seldom fail.
I would also mention that equipment that simply needs turning on and off generally use a common or garden power transistor. Such a piece of equipment can even be a computer board controlling a car engine. When these very expensive units fail, it's often because one of the power transistors (which generally look the same as the Triac shown in this thread) and controls one of the many sensors, has failed. What I'm trying to illustrate is that to repair the type of equipment described, little technical knowledge is required other than the ability to use a multi-meter together with the information given here.
Shots 4, 6 and 8 have been redone and are out of order, perhaps a moderator knows how to re-arrange them.........thank you, but in case not, this is how they are: 184.108.40.206.7
Nothing but heaven itself is better than a friend who is really a friend. - Plautus
Last edited by harrysin; 03-05-2009 at 12:05 AM.