(3) The phone out circuit provides an audio signal to the R-442 J103
and J104 pin B and extends the system on pin S P201. The extended phone out
circuit is applied through the MT-1898 J14 pin S to J12 pin H. Then through
the J-3514 P1 pin H to J1 pin H and J3 pin B (Figure 94. Issued as
adjunctive material.). (Trace this circuit on your system diagram.)
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R-442 receiver signal path (phone out).