Question about Sony CDX-F50M CD Player
To my knowledge, it would take two types of B+12 supply to turn on the unit; a constant/always on +12 on the yellow wire and a switched B+12 on the red wire (such as from the ACC terminal of the IGN switch.
If both B+s above are present and the grounding (black wire) has been verified to be connected to the chassis/ground, then it is an internal fault of the Sony CDX-F50M. This of course require that the unit be un-installed and diagnosed/check/repaired.
Absence of any of the two B+s would require tracing where the supply is not present. A DVM wold be handy for the check.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards.
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Posted on Jul 16, 2008
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Posted on Jan 02, 2017
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