Toshiba 4560 Service Manual page 320

18.12.6 Open switch input circuit
When all of the three reed switches are ON, the relay coil is excited, and +24 V power is supplied to the
drive circuit.
The voltage of CN13.1 is 0 V when the three reed switches are ON, and 24 V when one of the reed
switches is OFF .
4560/4570 RADF 18 - 62 Nov. 1997 © TOSHIBA