SATO S84NX - Page 5

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S84NX/S86NX Service Manual
3
4 Replacement ............................................................................ 54
4. 1 Notes on Replacing Parts ............................................................56
4. 2 Removing the Housing Cover .....................................................57
4.2.1 Opening the Rear Housing Cover ....................................................... 57
4.2.2 Removing the Front Housing Cover .................................................... 68
4. 3 Printing Section ............................................................................70
4.3.1 Replacing the Print Head .................................................................... 70
4. 4 Paper Transfer Section ................................................................72
4.4.1 Replacing the Platen Roller ................................................................ 72
4.4.2 Replacing the Pressure roller Plate .................................................... 74
4.4.3 Replacing the Pressure Roller ............................................................ 75
4.4.4 Replacing the Media Feed Roller ........................................................ 77
4.4.5 Replacing the Torque Limiter for Ribbon Spindle ............................... 79
4.4.6 Replacing the BF Spring for Ribbon Supply Spindle .......................... 81
4.4.7 Replacing the Ribbon Roller ............................................................... 84
4.4.8 Replacing the Gearbox ....................................................................... 86
4. 5 Sensors ..........................................................................................87
4.5.1 Replacing the Media Sensor ............................................................... 87
4.5.2 Replacing the Ribbon Sensor ............................................................. 91
4.5.3 Replacing the Ribbon End Sensor ...................................................... 93
4.5.4 Replacing the Head Open Sensor ...................................................... 95
4.5.5 Replacing the Top Cover Sensor ........................................................ 96
4. 6 PCBs and Electrical Parts ............................................................98
4.6.1 Replacing the USB PCB ..................................................................... 98
4.6.2 Replacing the Main (CONT) PCB ..................................................... 100
4.6.3 Replacing the Power Supply Unit ..................................................... 102
4.6.4 Replacing the Fan Motor ................................................................... 103
4.6.5 Replacing the Coin Battery ............................................................... 104
4. 7 Replacing the Timing Belt ..........................................................105
4.7.1 Replacing the Timing Belt of Gearbox .............................................. 105
4.7.2 Replacing the Timing Belt of Ribbon Motors ..................................... 108
4.7.3 Replacing the Timing Belt of Ribbon Unwind Mechanism ................ 110
4. 8 PCBs and Electrical Parts ..........................................................113
4.8.1 Replacing the Operator Panel (KB) PCB .......................................... 113