Table of Contents 
 
VT series Maintenance Manual    Rev.2  ix 
15.2    Replacing AMP Board on Joint #4 ................................................ 124 
15.3    Replacing AMP Board on Joint #5 and #6 .................................... 126 
 
16. LED Plate  127 
16.1  Replacing LED Plate ..................................................................... 128 
 
17. Felt Sheet  129 
17.1    Replacing Joint #1 Felt Sheet ....................................................... 130 
17.2    Replacing Joint #2 Felt Sheet ....................................................... 131 
17.3    Replacing Joint #3 Felt Sheet ....................................................... 132 
 
18. Controller Unit  133 
18.1  Replacing Controller Unit .............................................................. 134 
18.1.1    Standard, Cleanroom Model ............................................. 135 
18.1.2  Protection Model ................................................................ 138 
18.2    Replacing Power Board ................................................................. 143 
18.3  Replacing CPU/DPB Board ........................................................... 144 
18.4  Replacing Lithium Battery ............................................................. 147 
18.5    Replacing Cooling Fan .................................................................. 147 
18.6  Replacing SD Card ........................................................................ 148 
18.6.1    Standard, Cleanroom Model ............................................. 148 
18.6.2  Protection Model ................................................................ 149 
18.7  Fieldbus I/O ................................................................................... 150 
18.7.1  Standard, Cleanroom model ............................................. 151 
18.7.2  Protection Model ................................................................ 152 
18.8  RESET Switch ............................................................................... 171 
 
19. Calibration  173 
19.1  Overview ........................................................................................ 173 
19.2  Calibration Procedures .................................................................. 176 
 
20. Error Code Table  180 
 
21. Maintenance Parts List  181 
 
22. Option Parts List  184