Panasonic KX-FPC135 Service Manual page 167

KX-FPC135 / KX-FPC141
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 D501 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.
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