Hello guys!
Please help me with a power issue on one of the McCauley SOUND ID1.108-96p modules.
I have 2 modules from active speakers. One module gives 2 times less power than the other.
There are 2 modules, 2 amplifiers from Bang & Olutsen are connected to each module for HR and LR / MR. Each amplifier works differently:
- When applying one signal (sine 100Hz) with an average amplitude swing, we get 75v on the first amplifier (without speaker), and 38v on the other. Output power drop is 50%
They also have a preamplifier on which the ADC, DAC and mc9s08 microcontroller sit. Through diagnostics, the problem was identified precisely in the microcontroller located on the preamplifier. It is controlled by software, unfortunately, only from the manufacturer, which, according to the idea, covers those who do not want to, and even more, he was shocked when he found out that this line was being repaired by us, as they were taken out of production at the testing stage. Also on the board there is a port rc232.
I decided to go the old-fashioned way and waved the MK in places and the problem with the volume moved from one to the second.
I am attaching a photo. Thanks in advance!
PS, I really don’t want to amputate the preamplifier from there and install another one, although they have already been bought and found in anticipation of failure.
Please help me with a power issue on one of the McCauley SOUND ID1.108-96p modules.
I have 2 modules from active speakers. One module gives 2 times less power than the other.
There are 2 modules, 2 amplifiers from Bang & Olutsen are connected to each module for HR and LR / MR. Each amplifier works differently:
- When applying one signal (sine 100Hz) with an average amplitude swing, we get 75v on the first amplifier (without speaker), and 38v on the other. Output power drop is 50%
They also have a preamplifier on which the ADC, DAC and mc9s08 microcontroller sit. Through diagnostics, the problem was identified precisely in the microcontroller located on the preamplifier. It is controlled by software, unfortunately, only from the manufacturer, which, according to the idea, covers those who do not want to, and even more, he was shocked when he found out that this line was being repaired by us, as they were taken out of production at the testing stage. Also on the board there is a port rc232.
I decided to go the old-fashioned way and waved the MK in places and the problem with the volume moved from one to the second.
I am attaching a photo. Thanks in advance!
PS, I really don’t want to amputate the preamplifier from there and install another one, although they have already been bought and found in anticipation of failure.
