Copicat Super IC Overhaul Repair

[Rontone]

I have a pile of old Copicats I have been going through, next on the list is a Super IC model, in bad shape

Missing its motor/transformer, roller arm and a few other bits

Caps have burst and have a nice crust on them

Luckily I have new tape heads for this model, and a spare motor from an older model,


I have attached a schematic

So my spare motor has no extra winding to power the board, looking at the schematic I think I will need a 28v transformer with a centre tap to hook up

Is that correct? I wondering if I can get it to fit in there just next to the motor

Also it will need a 3 core mains lead fitting, I have seen it is ideal to add a transformer on the output signal to isolate it,

Does this have to be a 1:1 small Trans, will it have to be a certain impedance, I have seen some 10k:10k on ebay I could mount on a board and stand it off the chassis somewhere

[jojokeo]

So my spare motor has no extra winding to power the board, looking at the schematic I think I will need a 28v transformer with a centre tap to hook up

Is that correct? I wondering if I can get it to fit in there just next to the motor

Also it will need a 3 core mains lead fitting, I have seen it is ideal to add a transformer on the output signal to isolate it,

Does this have to be a 1:1 small Trans, will it have to be a certain impedance, I have seen some 10k:10k on ebay I could mount on a board and stand it off the chassis somewhere

Yes, appears to be a typical bipolar power supply set-up for older opamp chips w/ 28v CT transformer. The other output/isolation transformer appears to be CT as well on the schematic.

[Rontone]

Thanks, I will look at some 28v transformers to power the board

The other output/isolation transformer appears to be CT as well on the schematic.

Did you mean in the top right of the schematic? If so that is a pot core inductor on the oscillator board [the picture is from a different unit but same type of oscillator]

[Rontone]

Would one of these types of transformer work, if the two 0V are joined, does it become a CT?

[jojokeo]

Can't say for sure on the PT without a schematic/pinout for it? But I'm guessing you might? Test it first...

[Rontone]

Here is the wiring diagram from the datasheet