3-5-2 Ethernet Interface ............................................................................................. 27
3-5-3 USB interface ................................................................................................... 28
4. Hardware .................................................................................................................... 29
4-1 Wiring Diagram ....................................................................................................... 29
4-2 Block Diagram ........................................................................................................ 30
4-3 Special Circuit Description ...................................................................................... 31
4-3-1 Power Circuit .................................................................................................... 31
4-3-2 Reset Circuit ..................................................................................................... 32
4-3-3 RS232C Communication Block Diagram .......................................................... 33
4-3-4 Ethernet Communication Block Diagram .......................................................... 34
4-3-5 USB Communication Block Diagram ................................................................ 34
4-3-6 Thermal Pinter Circuit ....................................................................................... 35
5. Disassembly and Assembly ...................................................................................... 36
5-1 Case-Lower Block ................................................................................................... 36
5-1-1 Case Lower Block ............................................................................................. 36
5-1-2 Main PCB Block ................................................................................................ 37
5-2 Lower Frame Block ................................................................................................. 38
5-2-1 Lower Frame Block ........................................................................................... 38
5-2-2 Cover STD Block .............................................................................................. 39
5-2-3 Motor Assembly Block ...................................................................................... 40
5-2-4 Platen Roller Block ........................................................................................... 41
5-2-5 Paper Guide Block ............................................................................................ 42
5-3 Case Upper Block ................................................................................................... 44
5-3-1 Case Upper Block ............................................................................................. 44
5-3-2 Holder TPH Block ............................................................................................. 45
5-3-3 TPH Assembly Block ........................................................................................ 46
5-3-4 Lever Lock Block .............................................................................................. 47
6. Maintenance ............................................................................................................... 48
6-1 Cleaning Head ........................................................................................................ 48
6-2 Cleaning Sensors, Roller or/and Paper Path .......................................................... 49
7. Troubleshooting......................................................................................................... 50
7-1 Troubleshooting flow chart ...................................................................................... 50
7-1-1 Basic flow chart ................................................................................................ 50
7-1-2 LED dose not light ............................................................................................ 51
7-1-3 LED is red blink ................................................................................................ 52
7-1-4 LED is orange blink .......................................................................................... 53
7-1-5 Self test is not normal ....................................................................................... 54
7-1-6 Data from host is not printed normal ................................................................. 55
7-2 Power Problem ....................................................................................................... 56
7-3 System Problem ..................................................................................................... 57
7-4 Panel PBA and Media Sensor Problem .................................................................. 58
7-5 Thermal Printer Head and Step Motor Problem ...................................................... 59
7-6 RS-232C Serial Communication Problem ............................................................... 60
7-7 USB Communication Problem ................................................................................ 61
7-8 Ethernet Communication Problem .......................................................................... 62
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