Hi everyone !
My name is Pierre, I write you from France near Lyon. I recently bought my first B&O system, it is a Beosystem 5500.
I love the design, I am really happy even if the system is not at the top (for the moment).
When I bought it, according to the seller only the MCP had a problem.
After verification, the MCP was down. The Beogram CD50 was also down, the Beocord 5500 has some problems and the Beomaster 5500 is not either working.
I fixed the MCP, someone has replaced the smoked plastic glass on the display by a black one ! So it was impossible to see anything. I have order a piece of new plastic glass with the correct darkness, I glued it, I replaced the capacitors and now, it works very well.
I fixed the Beogram CD50. The motor was not spinning correctly. There was also a problem with the mute circuit and a problem with the draw. It works also well. I used the topic on this forum, it was very helpful.
I have a small problem onthe Beocord 5500, there is no fast foward and fast rewind even with the belt replaced. I will create a topic for this unit.
The most important problem is with the Beomaster 5500.
I solved the first problem. There was a capacitor blown in the protect circuit. Now the unit stays on.
The second problem is that when I power on the beomaster The resistor R224 and R225 blows up and even IC200 and IC201.
I replaced R224 and R225. I have desoldered and checked TR205, TR206, TR208 and TR209. There are all ok.
I have replaced the variable resistor R226 and cheked all the others resistors.
When I mesure tensions with IC200 and IC201 desoldered, there is +40V in the part that I have marked in red. I think that the problem is here but I can't find why there is so much tension.
I have marked in blue the part of the circuit with +40V and in yellow the part with -40V.
The problem is the same on the left channel but instead of having +40V, I have -11V.
If someone have an idea, I will be really pleased because I am completely lost. 🙁
Thank you !
Pierre