Epson TM-C3500 Series Technical Reference Manual page 160

1
Set the die-cut label, receipt or continuous label which length is 90 mm
or more.
2
Turn the power on while pressing the paper feed button. (Keep pressing
the Power switch until the POWER LED is on.)
Following test pattern is printed.
Nozzle check mode
160
Status
Aamd
Aamr
Aamc
Anod
Firmware Version
"Nozzle check mode"
"Media detection settings"
Printing position adjustment value (Cut position)
Printing position adjustment value 
(Cut position and printing position)
Specification
Anti-missing Dot Mode
Anti-missing Read Mode
Anti-missing Color Mode
No Missing Dot Detection Mode