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Old 3rd Mar 2020, 9:20 pm   #8
Antonello
Diode
 
Join Date: Feb 2020
Location: Sassari, Sardinia, Italy
Posts: 7
Default Re: Philips N4450 Reel to Reel Tape Player

Quote:
Originally Posted by TonyDuell View Post
There are two things that run all the time (when the machine is on) : The clock timer and the capstan motor.

You can disconnect the timer motor with the 2 push-on terminals next to it (these are 'live', so unplug the machine from the mains, disconnect the wires, then plug it in again). I seem to remember that the capstan motor is turned off in 'Amplifier' mode, so try selecting that with the slide switch.

Do either of those remove the noise?
Tony in my 4450 Philips if I put amplifier mode the motor does not stop but starts to turn at very high speed. What could be the cause?

I have already changed the BD135 without solving. I replaced all transistors on the control board

If I disconnect the card and put the amplifier in mode, the motor remains off.
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