Appendix D-68 Product Overview Rev. A
Confidential
Switch Circuit
The 24V supplied from the external power source is supplied to the required locations in this
circuit. The supply power source and application are described below. The 5V system has the
same type of switch, which is also turned on and off to configure it at the same time. The circuit
is configured with a MOSFET semiconductor switch. Q44 is a 2-element MOSFET that turns the
VCC_PRW and VCC_SEN on and off.
TableD-15 Switch circuit
Type (circuit
network name)
Switch
(On/Off) Control Application
24VA 24VSW2
Turned on and off by Q17
GA (U30) Thermal system power source (thermal head, paper
feed motor)
24VB OUTH GA (U30) Impact head drive power source, autocutter drive
power source, MICR read circuit power source. Supplied
via TH1 when other than OUTH = HIGH status. Can only
be turned off with power switch.
24VC 24VSW1
Turned on and off by Q45
GA (U30) Slip mechanism power source.
24V(DM) None None DM power source, DK power source.
VCC None None Started after power switch is turned on.
VCC-PWR 24VSW1
Turned on and off by Q44
GA (U30) 5V used by slip mechanism.
VCC-PWR2 24VSW2
Turned on and off by Q59
GA (U30) 5V for thermal system (thermal head, paper feed motor).
VCC_SEN SEN_PWR
Turned on and off by Q44
CPU (U3) Power source for slip system paper detection sensor.
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