Table of Contents 
3 
5.7  Liquid-level detecting board .............................................................................. 5-140 
5.7.1  Introduction........................................................................................... 5-140 
5.7.2  Board composition................................................................................ 5-140 
5.7.3  Replacement and Connection.............................................................. 5-143 
5.7.4  Troubleshooting.................................................................................... 5-145 
5.8  Laser Control Board .......................................................................................... 5-148 
5.8.1  Introduction........................................................................................... 5-148 
5.8.2  Board Composition............................................................................... 5-148 
5.8.3  Adjustment and Test Points.................................................................. 5-150 
5.8.4  Assembly and disassembly.................................................................. 5-151 
5.8.5  Troubleshooting.................................................................................... 5-151 
5.9  Pre-amplification board...................................................................................... 5-154 
5.9.1  Introduction........................................................................................... 5-154 
5.9.2  Board Composition............................................................................... 5-154 
5.9.3  Adjustment and Test Points.................................................................. 5-158 
5.9.4  Disassembly and assembly.................................................................. 5-158 
5.9.5  Troubleshooting.................................................................................... 5-158 
5.10  Indicator Board .................................................................................................. 5-160 
5.10.1  Introduction........................................................................................... 5-160 
5.10.2  Board Composition............................................................................... 5-160 
5.10.3  Disassembly and assembly method..................................................... 5-161 
5.10.4  Troubleshooting.................................................................................... 5-162 
5.11  Key Board.......................................................................................................... 5-163 
5.11.1  Introduction........................................................................................... 5-163 
5.11.2  Board Composition............................................................................... 5-163 
5.11.3  Disassembly and assembly method..................................................... 5-164 
5.11.4  Troubleshooting.................................................................................... 5-165 
6  Maintenance......................................................................................................... 6-1 
6.1  Maintenance Modules and the Corresponding Settings ....................................... 6-1 
6.2  General.................................................................................................................. 6-3 
6.3  Disassembling the Panels ..................................................................................... 6-4 
6.3.1  Removing the left door ............................................................................. 6-4 
6.3.2  Removing the right door........................................................................... 6-5 
6.3.3  Removing the top cover ........................................................................... 6-6 
6.3.4  Removing the back panel......................................................................... 6-7 
6.3.5  Removing the front door........................................................................... 6-8 
6.3.6  Removing the front cover assembly......................................................... 6-9 
6.4  Replacing the Valves, Pumps and Syringes........................................................ 6-11 
6.4.1  Replacing valves .................................................................................... 6-13 
6.4.2  Replacing the Pressure Chamber .......................................................... 6-15 
6.4.3  Replacing the Vacuum Chamber ........................................................... 6-17 
6.4.4  Replacing the Syringe Assembly............................................................ 6-18 
6.4.5  Replacing the Waste Pump.................................................................... 6-24 
6.5  Replacing the Bath/Aperture Assembly............................................................... 6-26 
6.6  Replacing the Sampling Module and Adjusting Position ..................................... 6-29 
6.6.1  Replacing the Sample Probe and Wipe ................................................. 6-29 
6.6.2  Replacing the Optical Sensor................................................................. 6-31 
6.6.3  Removing the Sampling Module ............................................................ 6-33 
6.7  Maintaining and Replacing the DIFF Reaction Bath ........................................... 6-37 
6.8  Autoloader Assembly (Closed-Tube)................................................................... 6-39 
6.8.1  Removing and replacing the closed-tube sample compartment assembly
 6-39 
6.8.2  Removing and replacing the detection switches of the sample transport unit