Simplex How to Correct Message Player not Playing over Speakers

Goal How to Correct 2001 Message Player not Playing over Speakers 2001 Message Board Assembly 635 672 installed Digital Message player will not play over speakers 2001 voice message does not play on speakers Replaced the Tape Player 635 306 with Digital Message Player 635 587 The 635 587 Digital Message player has a different pinout than the 635 672 Tape Player The Digital Message Player has separate inputs for positive or negative message activation voltage input voltage 2 activate P1 2 1 activate P1 4 input voltage 2 activate P1 16 1 activate P1 12