Epson TM-U675 - Control Panel Functions; Display Functions; Types of Displays; Types of Switches

Rev.D Product Overview Appendix D-69
TM-U675/U675P (with autocutter) Service Manual
Confidential
Control Panel Functions
This printer has four LEDs and two input switches.
Display Functions
The LED displays are shown below. The CPU (U3) controls them.
The circuit configuration is shown below. All lamps turn on when the signal outputs the HIGH
status.
Figure D-66
Types of Switches
The printer has two switches. As shown by the circuit for the display functions in the previous
section, input is enabled by two signals (SW_SLIP, SW_RPT). LOW status is input when the
panel switch is pressed. HIGH is input when the switch is not pressed.
Table D-15 Types of displays
Circuit Signal Color Application
LED_POWER Green Lights during normal operation
LED_ERROR Red Indicates printer error
LED_PAPER Red Indicates printer paper status
LED_SLIP Green Indicates slip selection
VCC
VCC
LED_PAPER
LED_SLIP
LED_ERROR
LED_POWER
SW_RPT
SW_SLIP
C13
C14
CN6
1
2
3
4
5
6
7
8
Q3
Q4
Q6
R178
R30 R31
R28
R179
R181
R29
R180
Q58