Tuner on board is a bad way to say it. Should be "no separate tuner".
Yours is before that & has a replaceable tuner assy.
The bad ones IIRC are CTC175-176-177-186-187.
Also that vintage were 9"&13" chassii TX81 & TX82 that
really sucked to work on but gave a nice pix. Yours is a very
good set, not to say the tuner wont go..............
73 Zeno
