Sure TK2050 AA-AB32186

Sure aa-ab32186 input filter values?

Hi.
I know this is an ancient thread, but I can't seem to find a schematic diagram for the Sure aa-ab32186 amp board. Does anyone here have a schematic for it -if not, but you DO have the amp, would you be able to tell me the values for the input rc filter at the jacks? On my board the chip resistor and small cap were removed. I want to restore/ replace them.
Thanks greatly,

Charles