Thorens TD 125 Mk2 Printed Circuit Control motor PCB turntable Board For Sale -

Thorens TD 125 Mk2 Printed Circuit Control motor PCB turntable Board

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Thorens TD 125 Mk2 Printed Circuit Control motor PCB turntable Board:
$250.00

Thorens TD 125 Mk2 Printed Circuit Control PCB Board. A new pcb board with a new componets used with the highest tolarances.
Tested and calibrated on the real turntable.If you old board is not working correctly (has a huge vibration, spins wrong direction, suddenly stops and so on), broken or you want to have an upgrade variant with the new components used here you have a chance to get a very quality new thorens 125 mkII board.
This board is new manufactured with the high-quality components used (only switch components transplanted from the old board to it).
The circuit is based on the last 125mk2 pcb design with the 741 op-amps instead of the old 709. This design is more sophisticated and used only on the very later 125mk2 turntables.
On all of the old thorens 125 PCBs all the electrolytic capacitors must be replaced with the new ones as they very often broken and out of the specs due to age.
Also, very often there could be found problems in the faulty transistors and rare in out of the specs or broken resistors, other capacitors, diode bridge and so on.
All the parts matched on this board are with the thorens specification and have the same or higher specs.
PCB is checked and all the adjustments done to get the correct voltages.
After this job the pcb has a perfect sinewave. This could be seen by an oscilloscope.
Such a board gives you absolutely stable work of your thorens motor with the lowest possible noise coming from it.
Also the old boards could have worn and oxidized switch contacts on the part of the board where is the sliding switch.
Here you will have a perfect new and gold-plated ready for the new life contact area. There will be a perfect and reliable contact.
Other problems you could have with your old board is an conducting due to the age, oxidation in any part of the board, burn-out parts of the circuit from the previous owners, cracks etc.
Mk2 pcb have a different design from the mk1 version. On the mk2 it's very commonly that one of 4 transistors is failed an this is the reason of the wrong work of the motor.
This item has all new transistors with the heatsinks option. So the operation will be smooth and there will be minimum risk of the overheating the components.
During the operation the old board has a visible play and oxidation in the switch contact area. Here you will receive a new hardgolded switch contact area. Perfect contact is guaranteed.Some obvious problems with the old thorens pcbs you could see on the photos.Here the full list of the advantages compared to the old thorens 125 pcb:1. All the Electrolytic Capacitors are changed to the top of the line Panasonic FC Series Ultra Low ESR Automotive grade AEC-Q200 compliant capacitors.
2. Old transistors changed to the new ones.
3. All the 4 transistors fitted with the heatsinks for more stable and reliable operation.
4. All the film resistors are uprated with the Tolerance of ±1%.
5. Old opened Trimming Potentiometers changed with the new quality closed ones. All the amplitube pots and speed trims adjusted.
6. Polypropylene Film Capacitors freshed with the high-quality VISHAY Polypropylene capacitors.
7. Diode bridge changed to the modern one.
8. PCB is durable and non-conducting with the high-quality of production and the materials used (copper, solder and so on).
9. PCB solder tin pots changed to the new and non-oxidized.
10.741 instead of the old 709 opamps design.
11. Sliding Switch Contact Area is new and HardGold covered. Perfect contact is guaranteed.The result of it could be seen by the voltmeter. The voltages are very stable and not jumping up and down.
Even on the perfect old thorens board there coundn't be such a stable voltages on every speed.MKI board is also available. Ask me for this.
If you want to have this pcb 60$ cheaper you could send me your old/broken PCB to me. Only the sliding switch, lamp and steel fixings will be transplanted from it to the new board. All the other parts will be new like in this lot.
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