Control Panel Functions; Display Functions; Types Of Displays; Types Of Switches - Epson TM-U675 Service Manual

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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.
Table D-15 Types of displays
Circuit Signal
LED_POWER
LED_ERROR
LED_PAPER
LED_SLIP
The circuit configuration is shown below. All lamps turn on when the signal outputs the HIGH
status.
LED_SLIP
LED_PAPER
LED_ERROR
LED_POWER
SW_SLIP
SW_RPT

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.
Rev.D
Color Application
Green Lights during normal operation
Red Indicates printer error
Red Indicates printer paper status
Green Indicates slip selection
Q3
Q4
Q6
Q58
Figure D-66
TM-U675/U675P (with autocutter) Service Manual
R178
R179
R181
R28
R180
VCC
CN6
1
2
3
4
5
6
7
8
VCC
R29
R30 R31
C14
C13
Product Overview Appendix D-69