3.12  Replacing the Gap/Black Mark Sensor Module ....................................................................................................................................... 23 
3.13  Cutter Module Installation (Option) ......................................................................................................................................................... 25 
3.14  Peel-off Kit Installation (Option) .............................................................................................................................................................. 27 
3.15  Slot-in Wireless Housing Installation (Option) ......................................................................................................................................... 31 
3.16  GPIO Interface Assembly Installation (Option) ........................................................................................................................................ 32 
3.17  Bluetooth Module Installation (Option) .................................................................................................................................................... 35 
3.18  Linerless Kit Installation (Option) ............................................................................................................................................................ 36 
4.  Troubleshooting ......................................................................................................................................................................................... 43 
4.1  Common Issues ...................................................................................................................................................................................... 43 
4.2  Knob Adjustment .................................................................................................................................................................................... 46 
4.2.1  Print head Pressure Adjustment Knob .......................................................................................................................................... 46 
4.2.2  Ribbon Tension Adjustment Knob ................................................................................................................................................. 47 
4.2.3  Mechanism Fine Adjustment to Avoid Ribbon Wrinkles .............................................................................................................. 48 
5.  Maintenance ............................................................................................................................................................................................... 51 
Revision History ................................................................................................................................................................................................ 54