Hi.
I live in the USA. I am working on a B790. I have rebuild power supply board and now getting correct voltage output (24/6 volts). However, the movement is not smooth, and thus the LED speed indicator does not come on when motor is in motion, reads 0000 when turns on. I have updated the RC4558s to new4559s. The voltage to the motor control board is correct, but the output voltage to the motor seems to fluctuate up or down by 1to 1.8 volts. Very rarely everything seems to work for 5 to 10 seconds then reverts back to fluctuating voltage and no rpm reading on display LEDs. I am using Crome translator, sorry I am not fluent in German, but desperately want to fix my Revox, and this is the best site in the revox world.
I live in the USA. I am working on a B790. I have rebuild power supply board and now getting correct voltage output (24/6 volts). However, the movement is not smooth, and thus the LED speed indicator does not come on when motor is in motion, reads 0000 when turns on. I have updated the RC4558s to new4559s. The voltage to the motor control board is correct, but the output voltage to the motor seems to fluctuate up or down by 1to 1.8 volts. Very rarely everything seems to work for 5 to 10 seconds then reverts back to fluctuating voltage and no rpm reading on display LEDs. I am using Crome translator, sorry I am not fluent in German, but desperately want to fix my Revox, and this is the best site in the revox world.