Another tip...R032 (that on the left) reads ok? it feeds the COM node of the adjustment.
Last edited:
Thanks for all your suggestions guys, over the week I am going to lift all the resistors to confirm.
@restorer-john I have already replaced this previously (with a 50V rating). Just now, I have confirmed that it is continuous on the negative side with the WHT wire, and the positive side is continuous with C10.
Actually, I have trouble imagining how the switch works? It has 2 white wires (I assume from the power supply) but it doesn't seem to be directly connected to the 3-way selector. Are they supposed to be decoupled or am I not seeing a connection between them?
Hi, the Switches are Just mechanicaly connected to the 3 way selector!
I Just finished the repairing of my 525. Main Problem was the yellow powerswitch. In closed State it hat a Résistance of 800 Ohms.
Resultate Output voltage 17 and -4,7 Volts.
I removed the switch and shorten the two white wires for testing.
Testing process:
The 3 way selector in off postion.
Then Plug in.
The motor should Starts Running as fast as it could, because of no Speed regulation is activ . Voltage is 18 V and - 4,9 V .
Voltage messurament was done After i also replaced the 3 Elcos on the Power Board.
If you Switch to 33 or 45 it should reduce the Speed. If you Just testing the Motor without the plate , the Motor stutters in 33 or 45 Mode. That’s normal , the smooth Rotation Just came up with the Weight of the plate.
I found an simular Switch in my „grabbelkiste“. It‘s from an old Radio Flipclock, but i think you could them as New or NOS Part.
Replacing the 3 Elcos from the Power section should be a Good idea.
Good luck
Regards Tim
I Just finished the repairing of my 525. Main Problem was the yellow powerswitch. In closed State it hat a Résistance of 800 Ohms.
Resultate Output voltage 17 and -4,7 Volts.
I removed the switch and shorten the two white wires for testing.
Testing process:
The 3 way selector in off postion.
Then Plug in.
The motor should Starts Running as fast as it could, because of no Speed regulation is activ . Voltage is 18 V and - 4,9 V .
Voltage messurament was done After i also replaced the 3 Elcos on the Power Board.
If you Switch to 33 or 45 it should reduce the Speed. If you Just testing the Motor without the plate , the Motor stutters in 33 or 45 Mode. That’s normal , the smooth Rotation Just came up with the Weight of the plate.
I found an simular Switch in my „grabbelkiste“. It‘s from an old Radio Flipclock, but i think you could them as New or NOS Part.
Replacing the 3 Elcos from the Power section should be a Good idea.
Good luck
Regards Tim
Hi Tim,
To clarify, after replacing the switch, you are getting 18V and -4.9V, and the speed is 33rpm and 45rpm?
Danke.
To clarify, after replacing the switch, you are getting 18V and -4.9V, and the speed is 33rpm and 45rpm?
Danke.
Yes after shorten the white wires I got the correct voltage. And After installing the New Power Switch i got the Same correct correct voltage as well. I think it’s Not Worth trying to repair the old yellow Switch.
Try getting a New one.
Tim
Try getting a New one.
Tim