vi
Replacing the Plunger Motor.......................................................................................6-48
Replacing the Plunger Leadscrew /Supernut Assembly .................................................6-50
Replacing the Plunger Flag Assembly..........................................................................6-52
Replacing the Needle Guide ........................................................................................6-54
Replacing the Vial Locator..........................................................................................6-55
Replacing the Tower Disk Assembly ...........................................................................6-56
CHAPTER 7 DIAGNOSTICS
INSTRUMENT START UP.....................................................................................................7-3
Power on Diagnostics...................................................................................................7-3
Power Failure Recovery................................................................................................7-5
Diagnostics Mode.........................................................................................................7-5
Autosampler ..............................................................................................................7-11
CHROMATOGRAPH MODE............................................................................................... 7-14
Splash Screen.............................................................................................................7-14
Chromatograph Mode .................................................................................................7-18
CHAPTER 8 TROUBLE SHOOTING
CHAPTER OVERVIEW ........................................................................................................8-3
Solving GC Problems ...................................................................................................8-3
In the Event the Customer Forgets Their Password.........................................................8-5
Troubleshooting General Instrument Problems ...............................................................8-5
Error Messages............................................................................................................8-5
CHAPTER 9 ELECTRICAL SYSTEM
LEGO INTERFACE P. C. BOARD OVERVIEW .......................................................................9-5
CPU and Memory (Sheets 1 and 4 on the LEGO Interface Board Schematic)...................9-5
LCD Display and Touch Screen Interface (Sheet 2 on the LEGO Interface Board Schematic)
...................................................................................................................................9-6
RS232 Interface (Sheet 3 on the LEGO Interface Board Schematic) ..............................9-10
OVERVIEW OF THE ELECTRICAL SYSTEM........................................................................ 9-13
Power Supply.............................................................................................................9-15
OUTPUT RIPPLE......................................................................................................9-15
OUTPUT HOLD-UP TIME........................................................................................9-15
POWER LINE SURGE ..............................................................................................9-15
POWER LINE SAG...................................................................................................9-15
AC Distribution PC Board..........................................................................................9-15
Heater, Solenoid, and Fan Control...............................................................................9-16
Interrupt Generation ...................................................................................................9-16
Main PC Board..........................................................................................................9-16
CPU..........................................................................................................................9-17
Solenoid and Motor Control........................................................................................9-17
RS232 Interface.........................................................................................................9-18
Slave Interface ...........................................................................................................9-19
Analog Section...........................................................................................................9-19
Connector Description List .........................................................................................9-20
Power On Diagnostics Bits..........................................................................................9-21
Interrupts...................................................................................................................9-21
Main Board Memory Map...........................................................................................9-22
Autosampler PC Board...............................................................................................9-23
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