Gunther I'm working my way through it, and glad that you are here helping, but I'm into the last jobs I have to finish before christmas and will not get much time for the lovely BM 4000 before January, as I go on vacations 25/12 to 02/01 in Yucatan, sun beach and a lot of cubas with the whole Mexican Family I've got here. Jacques Still missing

The trimpot is set to the same value as the right, but I cant adjust it until I get some feed to it. Still looking, but got tired and as my head is spinning, I decided that watching Broncos and a cuba libre was a much better way to spend the rest of the Sunday

Here the update text in English

Per H is faster than I am, but the only update on my BM are the resistors 490,491.

As I dont have an oscilloscope, no waveform. But, TR48/49 has same voltages as in right channel, also TR51 is same as right channel, the problem starts at the 2 68K resistors 548, 549, after 549 I should have 34.5V I only get 12.xV there, I thought the 68Ks was bad and took them out and checked but they are OK, put in new ones anyway, in both channels

No Menahem, no burnmarks must be the flashlight, and the right channel is OK

Changed the 4 resistors, but no luck, failure is still the same, and the old resitors was OK, only some 2 to 3% difference, was checking right to left channel with and without power, and found some more points with voltage and resistance diff. will continue tomorrow [quote user="Søren Mexico"] Today I went after my missing left channel

I have the resistors that I have to change, but yesterday I had all the tools out fixing the boxes for the 3702s, I should have worked on the BM 4000 but I was nervous and afraid to do it, I'm a coward, but today I'll do it.

In my opinion Axels new look is the most correct, the MMC has the biggest angle and is the original, the SMMC is somewhere between the 2, I have to run both with 1.5 gr. weight on the arm, both correctly 0 adjusted, with 1.2 gr. the sound is missing highs and bass.

And here my MMC4 came with my BG 5000 2 years ago, still plays good, and very small diff. to SMMC4, through BM 2400