Epson TM-H6000 Service Manual page 159

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)
24VA
24VB
24VC
24V(DM)
VCC
VCC-PWR
VCC-PWR2
VCC_SEN
Appendix D-68 Product Overview
Switch
(On/Off)
24VSW2
Turned on and off by Q17
OUTH
24VSW1
Turned on and off by Q45
None
None
24VSW1
Turned on and off by Q44
24VSW2
Turned on and off by Q59
SEN_PWR
Turned on and off by Q44
Control Application
GA (U30) Thermal system power source (thermal head, paper
feed motor)
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.
GA (U30) Slip mechanism power source.
None DM power source, DK power source.
None Started after power switch is turned on.
GA (U30) 5V used by slip mechanism.
GA (U30) 5V for thermal system (thermal head, paper feed motor).
CPU (U3) Power source for slip system paper detection sensor.
Rev. A