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We agree that I’m not the right person to repair it, nor that it’s a simple tray to repair, but there’s no one here who wants to do it, so what do I do, throw it away…? On the other hand, I respectfully disagree that it caused any problems since I lubricated it in accordance with the technical service manual and with the appropriate products. I was also right that this sensor was an IR type and not an incandescent one. Furthermore, when you tell me: “1TR1 turning on 0TR1 so that 22V is sent to activate the arm motor circuit,” in reality, according to the diagram, it’s 22 volts. Your model is different from mine. The problem was always the same; there were no other problems caused by my intervention. I’m sorry for the inconvenience and thank you for your time.
Hi Sr. When I refer to connecting the turntable, I mean 220 volts (mains). Secondly, the turntable does absolutely nothing and has no blown fuses. And the sensor light behind the transparent ruler is an IR LED, it’s categorical. I sent you a photo of that LED; it’s not incandescent, except for the optical shutter light for the arm movement. Regarding removing the control panel and its circuit board, I work with a grounded static discharge wristband, and I specialize in electronic repair of laptop computers. Audio isn’t my specialty, but there’s no one in Argentina who understands this brand of turntable. I repeat, the turntable does absolutely nothing when plugged into the mains. And there are no blown fuses. I’m attaching a photo of the IR LED. It’s not incandescent. I already tested it with 1.5 volts, and I can only see whether it lights up or not with an infrared lens. Finally, you insist there’s no infrared LED. I’ll prove it to you. I’ve already identified the circuit. Please see the circuit in the attached photo. Sincerely.
P.D.: My model, unlike yours, has an IR sensor, not a fluorescent one.
I’m attaching a photo of the IR LED. It’s not incandescent. I already tested it with 1.5 volts, and I can only see whether it lights up or not with an infrared lens. That said, please tell me how I proceed from here. Do you have a flowchart?”Good morning. I clarify my last post. Now, when I plug the turntable into a power outlet, the speed control and rear sensor lights come on. If I set the speed to 33 RPM, it makes half a turn and stops, but if I set it to 45 RPM, the motor spins. Without the metal covers, I press the Stop key; the motor (without the belt) that moves the tangential tone arm spins. If I press Start, does it stop? With the belt in place, it doesn’t move, as if the threaded bronze shaft were stuck to the right, like it’s locked. However, if I insert the covers and set the turntable to play a record, the Start function doesn’t activate, nor do the right-left arrow keys. I do press the key to raise and lower the tone arm. I don’t know which component controls the speed, because only the motor works at 45 RPM, not 33 RPM. Try recording a video.
Now, another problem: if I move the tangential arm by turning the motor by hand, I can raise and lower the arm. The Start works at 45 RPM, but not at 33 RPM, which controls that speed?. I took out the Transistor TIP120 and TIP125 RPM models and checked them with a tester, and they were fine.