dnpainting
Super Member
About a month or so ago, I had a problem with the tonearm movement on this turntable. I checked for being level and that was fine. I disconnected and move it to the garage to make adjustments on the trim pots. Now, the service manual specifies that you should connect extensions onto the connectors so the wires are not being pulled tight. I really should have done this, but, I didn't. Instead, I propped up the lid, which holds the power supply board and tranny, put a small clamp on it to hold in place, and started making adjustment.
All was going quite well, UNTIL, my son's football came bouncing in and hit the table. The lid came crashing down, all juiced up and still turned on. Sparks flew, IC's exploded and lots of smoke. I immediately cut the power, but, it was too late. The table was fried.:tears:
I searched out all the IC's and started ordering, 17 in all exploded or cracked. There are alot that they no longer make so I had trouble locating all of them. I, in the past, purchased a board and motor to build a RCM and I kept the person in my contacts, so I emailed him and he had told me that a double layer board is very hard to repair because there is a high risk of destroying the wire inside. Needless to say, I purchased another board from him, along with a complete power supply for cheap. I reassembled after testing the power supply and main board for currents.
I was now having a problem with the tonearm and the auto features. When you would power it on, the motor would start spinning, the start/stop would not function correctly, when it was pushed, the tonearm would travel all the way across to the center of the platter and then return and would not function again, unless you turned off and back on. Meanwhile, the platter rotates the whole time. Since I had replaced the main board, I knew the trouble had to lie in the coil assembly of the tonearm. I tested all the LED's, which were still good, then tested the Darlington Photo Transistors. That was where the trouble was. Four of the Five were shot. I searched for a good 3 days for these TPS605 Transistors, then, when I let the person whom sold me the boards know, he found them with-in an hour from a company, not on the bay, in which they arrived today.
I put on my glasses and my jewelers glasses and got them all soldered in place. Re-assembled, and IT LIVES AGAIN!
That just absolutely made my day. In the morning, I will finish the setup, move the plants and pictures my wife so graciously place on the speaker where this TT goes out, re-level and will be spinning once again.
All was going quite well, UNTIL, my son's football came bouncing in and hit the table. The lid came crashing down, all juiced up and still turned on. Sparks flew, IC's exploded and lots of smoke. I immediately cut the power, but, it was too late. The table was fried.:tears:
I searched out all the IC's and started ordering, 17 in all exploded or cracked. There are alot that they no longer make so I had trouble locating all of them. I, in the past, purchased a board and motor to build a RCM and I kept the person in my contacts, so I emailed him and he had told me that a double layer board is very hard to repair because there is a high risk of destroying the wire inside. Needless to say, I purchased another board from him, along with a complete power supply for cheap. I reassembled after testing the power supply and main board for currents.
I was now having a problem with the tonearm and the auto features. When you would power it on, the motor would start spinning, the start/stop would not function correctly, when it was pushed, the tonearm would travel all the way across to the center of the platter and then return and would not function again, unless you turned off and back on. Meanwhile, the platter rotates the whole time. Since I had replaced the main board, I knew the trouble had to lie in the coil assembly of the tonearm. I tested all the LED's, which were still good, then tested the Darlington Photo Transistors. That was where the trouble was. Four of the Five were shot. I searched for a good 3 days for these TPS605 Transistors, then, when I let the person whom sold me the boards know, he found them with-in an hour from a company, not on the bay, in which they arrived today.
I put on my glasses and my jewelers glasses and got them all soldered in place. Re-assembled, and IT LIVES AGAIN!
That just absolutely made my day. In the morning, I will finish the setup, move the plants and pictures my wife so graciously place on the speaker where this TT goes out, re-level and will be spinning once again.
