BeoSound Ouverture

9th April 2010

This unit showed no signs of life. Measurements around the microcomputer showed that the +5V supply was low at 0.8V because 12F1 (1A) was open circuit. A brief meter check showed no obvious reason for the failure but when a new fuse was fitted 15F5 (2.5A) failed instead. A short circuit was now measurable across the +5V supply, after disconnecting the various loads it was discovered that 12D43 (6V2) was short circuit. A replacement diode and fuse cured all the faults; the original must have been breaking down intermittently. [BeoSound Ouverture]