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Jun 2001
Mainframe
Agilent 6890 Gas Chromatograph Service Manual
Power/Electronics Replacement 430
Replacing the battery
Replacing the battery
WARNING Before proceeding, turn off the main power switch.
Caution Make sure you are properly grounded with an ESD strap before continuing.
Removing the battery while the instrument is unplugged erases all user
entered setpoints, methods and sequences.
The 3V battery for the 6890 GC supplies the power to retain user entries in
memory, such as programmed methods and sequences, in the event of a power
failure or when the instrument is unplugged. The battery is located in the
lower left corner of the main board.
To replace the battery, slide the battery down and pull the battery out of the
bottom first.
Figure 430-10 Location of the battery on the main board
Hole for
Oven Access
Cutout
Beeper
P11
P1
P2
P12
P13
P17
GND
P15
DSP
Gate
A
r
r
a
y
CPU
G
N
D
4 ROM
Sockets
3V
Lithium
battery
Gate
Array
P16
P21
P22
P3
J1
J2
JP1
JP2
J4
J6
J5
F2 F1
F4 F3
P18
+24V
–24V
+15V
–15V
+5v
Capacitor
Capacitors
J8
transformer
cable
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