Agilent Technologies 6890 Series Service Manual page 23

Contents
Sampler injector or tray ........................................................................... 14
1215 External Connectors, 6890N
Overview ...................................................................................................... 1
Samplers and Tray ..................................................................................... 2
Signal 1/Signal 2 analog out ....................................................................... 3
Local Area Network (LAN)........................................................................ 4
RS-232........................................................................................................... 5
Signal descriptions.............................................................................. 6
Remote start/stop........................................................................................ 7
Signal descriptions.............................................................................. 7
Remote control.................................................................................... 8
External event ............................................................................................ 9
BCD inputs................................................................................................. 10
1220 Main Board, 6890A and 6890 Plus
Test points ................................................................................................... 1
Connector electronics ................................................................................ 2
Fuses............................................................................................................. 5
Circuitry diagrams ...................................................................................... 6
1225 Main Board, 6890N
General board layout.................................................................................. 1
Connectors................................................................................................... 3
Fuses............................................................................................................. 5
1230 Power Supply
Setting the instrument power configuration ........................................... 1
Line voltage configuration plug......................................................... 2
Ceramic fuses ...................................................................................... 2
Oven shroud......................................................................................... 3
Replaceable AC board fuses...................................................................... 4
AC power board connectors...................................................................... 5
AC power board circuitry .......................................................................... 7
Testing resistance of the heater coil ........................................................ 9
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Contents
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001