Panasonic KX-FP101AL Service Manual page 137

KX-FP101AL
When the motor suspends while it is in the receive mode (about 70~80 msec), pin 163 of ASIC IC501 becomes a low level and
Q515 turns OFF. Then Q502 also turns OFF, and instead of +24 V, +5 V is supplied through D503 so that the motor is held in place.
When the system is in the stand-by mode, all of the motor drive transistors turn OFF. Consequently, the motor current stops.
137