Hi,
a Marantz ST300 arrived in good cosmetic condition and all lights working - but no audio from either AM or FM. Problem turned out to be the 28 pin IC at the heart of the unit has gone AWOL.
It's a distinctive looking sod with a metal grounding tab at one end - as indicated by a few pics found on the net.
But what is the number ?
Reckon it likely starts with "TDA..... "
... Phil
Yeah, then you find it and find out you can't get quadrature, or itwon't oc ne out of muting even with the switch. Or won't mute.
They weren't quite into change for the sake of a buck like today, but they did have the idea to be exclusive. that is why the "audiophools" for more f or the 1970s stuff. Some of it did sound just as good or better, and there were practically no ICs. This shit can be fixed until the end of time.
Good Morning Phil,
According to the service manual, Q206 is a AN7000. (Marantz pert number HC10009020)
Good luck in your quest.
Regards, Tim Bristol Electronics
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