Anyone happen to know of a datasheet for the Temic/Telefunken 1890DFC FM module pinout? Perhaps any radio schematic that uses this module is sufficient, I might be able to pick out what I need.
Supposedly this is a fairly common FM module that includes RF front end through stereo multiplex decoder. Only has a piece of the PLL - just the VCO as far as I can guess. It has a metal shield and is a surface mount and epoxied Chip On Board's on it.
Googling has resulted in a bunch of people talking about it, but no specific data...
Trying to debug a radio that has custom IC designations and no schematics, which thwarts me from figuring out what goes where. This 1890DFC is the only thing, minus perhaps the output amplifiers, that have anything that may have researchable data on it. The output amplifiers are working as AM works, so I need to go upstream to figure out why FM is not working in my other thread ...
Supposedly this is a fairly common FM module that includes RF front end through stereo multiplex decoder. Only has a piece of the PLL - just the VCO as far as I can guess. It has a metal shield and is a surface mount and epoxied Chip On Board's on it.
Googling has resulted in a bunch of people talking about it, but no specific data...
Trying to debug a radio that has custom IC designations and no schematics, which thwarts me from figuring out what goes where. This 1890DFC is the only thing, minus perhaps the output amplifiers, that have anything that may have researchable data on it. The output amplifiers are working as AM works, so I need to go upstream to figure out why FM is not working in my other thread ...
Comment