Jag har totalt kört fast i biasing och ofsett mätning av min 22AH380!
Jag har bytt alla transistorer till nya original i den trasiga sidan av förstärkaren, Och bytt alla kondingar på korten till Elna Silmic.
Kan någon vara snäll och hjälpa mig lite? Chemat i servicemanualen har otydlig upplysning av mätpunkterna!
Jag lägger in uppgifterna som jag lade ut på nätet men fick inget svar på!
Kan någon hjälpa mig så är lyckan gjord!
I am about to set the quiescent current at my 22AH380. But where are the measurement points 1-2-3-4 on the amplifier card? Can you help me write down how to adjust the quiescent current and the offset? I have changed all transistors to new originals on the right side, And all the capacitors throughout the amplifier!I have to adjust the measuring points 1 and 2 with resp r646a and 646b at 0 volt without load of the output stages and without signal control. maximum deviation up or down of 10 millivolts and points 3 and 4 with r647a and 647b at 20 millivolts with a maximum deviation of 2 millivolts? What about to use the upper end of R643 a and b as measuring point? Is this the best way to do?
I think this service manual is wrong https://www.vintageshifi.com/repertoire ... Manual.pdf! 1 and 2 are not the measurement points for the quiescent current, Or what meant those who did the service manual ? What measuring points had you do used as measuring points? What about using the upper end of R643 a and b if you look at the printed circuit board, On page CS 64 791 of the service manual, As measuring points?
Am I out on the wrong road or? It was many years since I made such a setting and I need some help!Best regards!