Panasonic KX-TCD725RUM Service Manual page 186

0V DC ON-HOOK
+6.7V DC OFF-HOOK
TX-AF
470K
0V DC ON-HOOK
+2.8V DC OFF-HOOK
IC6
0V DC ON-HOOK
+3.6V DC OFF-HOOK
N.M.
RX-AF
2u2
+2.0V peak
KX-TCD725RUM: SCHEMATIC DIAGRAM BASE UNIT
FREQUENCY: 96kHz
2.8V
0V
10.368MHz burst
RX-DATA
TX-DATA
IC4