Agilent Technologies 6890 Series Service Manual page 14

Contents
Removing the injection port fan.............................................................. 16
Removing the keyboard ...........................................................................17
Removing the pneumatics area fan.........................................................18
Chassis mounted fan......................................................................... 18
Bracket mounted fan ........................................................................ 19
420 Oven and Temperature Control
Heated zones................................................................................................ 1
Oven ramp rates .................................................................................. 1
Configuring the GC for an MSD......................................................... 2
Oven temperature troubleshooting...........................................................3
Testing resistance of the heater coil......................................................... 4
Cryo valve installation/replacement ......................................................... 5
Installing a new cryo valve................................................................. 5
Replacing an existing cryo valve ....................................................... 7
Replacing the oven shroud assembly ..................................................... 10
Replacing the oven sensor ....................................................................... 13
Replacing the oven fan .............................................................................14
Replacing the oven fan motor ................................................................. 15
Replacing the oven flap motor ................................................................ 17
Converting the oven type ......................................................................... 19
Configuring the oven ........................................................................ 19
430 Power/Electronics Replacement
Replacing the main board .......................................................................... 1
Installing an MIO card (6890A and 6890 Plus) ....................................... 7
Replacing ROMs on the main board (6890A and 6890 Plus) ............... 11
Removing a ROM............................................................................... 11
Inserting a ROM................................................................................. 12
Replacing the battery................................................................................ 13
Replacing the pneumatics board............................................................. 14
Replacing the PCB bracket .............................................................. 15
Replacing the transformer-GC serial number < 10225 ...................... 17
Replacing the transformer-GC serial number ≥ 10225 ...................... 19
Replacing the ALS Interface Board.........................................................23
Jun 2001
Contents
Agilent 6890 Gas Chromatograph Service Manual
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