General Forum

Re: Help! My BeoLink MCL2P is burned out.

JIeo — Tue, 22 Apr 2008 17:13:19 GMT

Well, it is a pity. Thank you Keith!

Re: Help! My BeoLink MCL2P is burned out.

JIeo — Tue, 22 Apr 2008 15:11:57 GMT

New information:

When I turn on my BS3200, LED indicator changes from red to green, after that it comes back to red color gradually (~1 second). It accompanies two tick sounds (ON and immediately OFF) of the MCL2P relay. I suppose that 15 seconds of sound provide with two 6800 μF capacitors. And after 15 seconds they become empty.

Anybody know why the relay switches back immediately?

Re: Help! My BeoLink MCL2P is burned out.

Keith Saunders — Tue, 22 Apr 2008 14:37:18 GMT

Based on your "Problem Statement" the problem must be in the power supply section, however I do not have a circuit diagram and without one it is going to be difficult to fix.

Re: Help! My BeoLink MCL2P is burned out.

JIeo — Tue, 22 Apr 2008 14:27:36 GMT

Well, the stereo amplifier microcircuit has just replaced by me. Result was the returning a right channel. But the main symptom remained =( All channels work but just for 10 seconds. Then they are becoming quiet gradually within 5 seconds...

Can anyone possibly help me to find out what is wrong?

Thanks!

Help! My BeoLink MCL2P is burned out.

JIeo — Sun, 20 Apr 2008 20:37:34 GMT

I bought MCL2P on eBay. As soon as it was delivered I had discovered the following thing.

When I switch it on together with my BS3200, only a left channel works but just for 10 seconds. Then it is becoming quiet gradually within 5 seconds. That is all =(

I opened the cover and discovered that 4 resistors is burned out. I found out the nominals of 3 of them by the color identification.

R212, R214, R217 - 2.2 kΩ (gold-red-red-red)

Unfortunately R216 is burned out at all, multimeter indicates 700 Ω, but I believe it was changed by heat and its nominal was 2.2 kΩ too.

I have just replaced all these resistors on 2.2 kΩ ones, but the symptoms remain.

I suppose that the stereo amplifier microcircuit burned out. Can it really be true? I am going to buy STK4151V and replace it tomorrow. Should I do it or the trouble in other electronic component?