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Mooly · 2nd Feb 2023, 2:32 pm

I'm not so sure that would work Ben. I think I would simply replace that 270 ohm by a diode, the anode to the cell.

The chip runs of the main rail normally via D6901 with that diode blocking current from the battery feeding back into the rest of the set when power is off.

2nd Feb 2023, 2:32 pm	#10
Mooly Octode Join Date: May 2011 Location: Lancashire, UK. Posts: 1,351	Re: Philips CP90 and others: memory battery. I'm not so sure that would work Ben. I think I would simply replace that 270 ohm by a diode, the anode to the cell. The chip runs of the main rail normally via D6901 with that diode blocking current from the battery feeding back into the rest of the set when power is off.