Toshiba RC-K1 Clock Radio

[davegsm82]

Have received the schematics from Radiomuseum, sadly looks like it will be curtains for this unit, the 'A' line from the keyboard is most definitely an 'Input' on the T6589 clock IC, however it's suddenly become an 'Output' and is stuck high at about 200k-Ohms but only when powered up. When switched off it's just like all the other pins, about 0.5MegOhms.

I suspect the T6589 IC is a special and only used in this unit. Shame!

Thanks for all the help.