I have taken a photo of the underside of the chassis of my radio.
If the resistor you have arrowed as R39 is the brown green brown then I believe it is R29. The 10k resistor behind this area is odd, I cant find it on the schematic at all.
Here is a photo of the
whole under chassis showing the components.
By the way I found it much easier fitting the chassis back in the cabinet if the cabinet is laid down on its front. I replaced the hex head bolts with philips type screws, I believe they are 2BA, a blob of wax or bluetac on the screw head helps hold it on the screw driver.
Mike