I recently changed the drawer loading belt on a 5500, and all was fine at first. Now, however, I'm getting this squealing noise after the drawer closes. I'm pretty certain it's the motor still turning even though the drawer has fully closed. And, in fact, I monitored the voltage and see that the motor is still receiving around 13V during the time that it should have stopped. Has anyone else encountered this? It seems as if whatever signal (from a leaf switch?) that should tell IC9 that the drawer is closed isn't getting through.
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Beocord 5500 Drawer Closing Noise
7 replies
There is no switch involved. The direction and action is controlled by two pins, 21 and 22 on IC8 that provide a differential voltage to dual op-amp IC9. I do not have access to the service manual that may explain how end of travel is sensed.
Martin: Do you know what that preset time would be?Please Log In to Reply
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