Confidential
EPSON
TITLE
SHEET
REVISION
NO.
SHEET
NEXT
B
RP-U420 series
Specification
(STANDARD)
42
41
3.6 Self-test
1) The printer has a self-test function that checks the following:
•
Control ROM version
•
DIP switch settings (DIP SW2-1, 2-2 and 2-4 are not printed.)
2) Self-test on paper roll
[Starting the self-test]
To start the self-test on a paper roll, turn the power on while pressing the receipt paper feed button
with the cover closed.
When the receipt paper feed button is released after approximately 1 second (if the DIP SW2-3 is
On, the printer beeps once shortly), the printer starts printing the printer status.
[Self-test standby state]
After printing the current printer status, the printer prints the message "Self-test printing. PRESS R-
FEED button." The receipt and journal PAPER OUT LED blink, and the printer enters the test
printing standby status. (Refer to Table 3.4.1)
Press the receipt paper feed button in this state to start test printing.
3) Ending the self-test
After a number of lines are printed, the printer indicates the end of self-test by printing
"***completed***," performs initialization, and then goes to normal mode.
