Agilent Technologies 6890 Series Service Manual page 432

430 Power/Electronics Replacement
Replacing the main board
WARNING Before proceeding, turn off the main power switch and unplug the power cord.
Caution Make sure you are properly grounded with an ESD strap before continuing.
The main printed circuit board in the 6890 GC is mounted on a metal carrier
bracket on the right side of the instrument. The board and the bracket are
replaced as an assembly.
1. If any external detectors are installed on the right side of the instrument
through the large cut out on the main board, disconnect them now.
2. Remove any detector interface boards (P1, P2) from the main board.
3. Disconnect the cables from the following connectors:
J7
J8
P3
P11
P12
P13
P16
P17
P18
Jun 2001
AC Power
Integrated ALS PCB (6890 Plus only)
EPC Board
Display
Keyboard
Keyboard
Oven sensor
Oven door switch
Inlet fan, oven flap, oven cryo
Mainframe
Agilent 6890 Gas Chromatograph Service Manual
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