I have Marantz model 1072 amplifier. The left speaker plays sound on all the selector inputs. But the right speaker blow. I Measure a 33.5 volt on the right speaker output. What is causing it..
crwdns2934109:0crwdne2934109:0
crwdns2934065:0crwdne2934065:0: 6crwdns2936485:0crwdne2936485:0
4
5
33.5V on the speaker will definitely blow it. Circuits are different, but if there is an output cap on the line, it could be shorted. A direct connect push-pull circuit could have a shorted transistor, or the feed could be turning full on one side. Or if it is driven by a integrated amp, the amp is shorted out.
crwdns2934105:0crwdne2934105:0
crwdns2934065:0crwdne2934065:0: 827,8crwdns2936485:0crwdne2936485:0
1,3crwdns2936485:0crwdne2936485:0
934
2,4crwdns2936485:0crwdne2936485:0
@francois61923 could be an overvoltage issues based on a bad power amp transistors. Time for you to look at your boards and see if you identify any "odd" looking component etc. Here is the Marantz 1072 1050 SM use that to check the schematics. If unsure, take some well focused pictures of your boards and post those with your Question. Who knows, we might just see something that might be helpful. Adding images to an existing question
crwdns2934105:0crwdne2934105:0
Thank you, i look around on the board now to see anything od
crwdns2936751:024crwdne2936751:0 0
crwdns2936753:07crwdne2936753:0 16
crwdns2936753:030crwdne2936753:0 36
crwdns2942667:0crwdne2942667:0 36
crwdns2944067:02crwdne2944067:0
@francois61923 what do you measure on the left?
crwdns2934271:0crwdnd2934271:0 oldturkey03 crwdne2934271:0
On the left speaker i measure 0 voltage
crwdns2934271:0crwdnd2934271:0 Francois crwdne2934271:0