CROSS PERSONAL: Service & maintenance manual - rev. 1.1
Page 3.6
3.2.12. SECONDARY ON/OFF SWITCH
The Secondary Switch Board contains an (SW) logic which governs the switching ON/OFF of the
equipment via a relay switch on the Secondary Switch Power Board (acts as controller). The Board
has, in particular, an infra-red transmitter and receiver. The transmitter is always on. When you
brush the start switch with your finger, this acts as a mirror for the signal, which is detected by the
receiver and switch ON the equipment. To turn OFF the equipment, touch the switch for 3 seconds.
3.2.13. AUDIO AMPLIFIER BOARD
This Board allows the audio signal from the Display to be amplified so that it is played through the
loud-speakers on the machine.
3.2.14. HAND SENSOR BOARD
This is the Board that manages the signal sent by the Hand Sensors, used by the user during training
sessions. The Receiver Board receives a power supply of +5Vdc from the Display Board.
The Receiver Board communicates with the Display Board using positive logic procedures. When it
is in stand-by, the signal has a +5Vdc value and as soon as it receives a signal indicating the
presence of a heart beat, it passes to 0Vdc and then with every heart beat it picks up, it generates an
impulse and returns to +5Vdc.
The Display Board receives a signal generated by the Hand Sensors (signal through contact) with
an amplitude of 100msec.
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