PT300, Service Manual
Rev B, October, 2000
3
Low batt indicator: ......................................................................................................................................23
Power down shutoff: ....................................................................................................................................23
SIO (totalizing):...........................................................................................................................................24
Load Cells:..................................................................................................................................................26
PROCEDURES...................................................................................................................................................27
LOADING PADS & BLOCKS..................................................................................................................................27
CALIBRATE SPAN...............................................................................................................................................27
Calibration..................................................................................................................................................27
REMOVE AND REPLACE MAIN CIRCUIT BOARD......................................................................................................29
Disassembly.................................................................................................................................................29
Assembly .....................................................................................................................................................29
REMOVE AND REPLACE LOAD CELL .....................................................................................................................30
Disassembly.................................................................................................................................................30
Assembly .....................................................................................................................................................31
CHECK FRONT/BACK LOAD CELL BALANCE ..........................................................................................................31
UNPACKING AND INSTALLATION ........................................................................................................................34
USE OF A LOAD CELL SIMULATOR........................................................................................................................34
COMPLETE LIST OF REQUIRED TOOLS AND MATERIALS .........................................................................................34
Spare parts list ............................................................................................................................................34
Connector pinouts .......................................................................................................................................36
TRANSMIT DATA FORMAT..................................................................................................................................36
PT300 MAIN CIRCUIT BOARD............................................................................................................................37
PARTS LIST .......................................................................................................................................................37
PT300 SUMMING CIRCUIT BOARD PARTS LIST .......................................................................................39
APPENDIX A......................................................................................................................................................40
APPENDIX B......................................................................................................................................................44
SCHEMATICS .....................................................................................................................................................44
TOTALIZING CABLE ...........................................................................................................................................47
CHARGING CABLE .............................................................................................................................................48
INTERNAL CABLE ASSEMBLY .............................................................................................................................50
PARTS.................................................................................................................................................................51
HOW TO REACH INTERCOMP SERVICE ...................................................................................................52
