134 1100 Series Nano Pump Service Manual
3 Repairing the Pump
Exchanging the Nano Pump Main Board (NPM Board)
1 Turn off the pump, disconnect all cables and remove the pump from the
stack.
2 Remove the top covers and foam, see “Removing the Top Cover and Foam”
on page 131.
3 Disconnect all connectors from the main board.
Frequency Board defective
Tools required Wrench 14 mm
Wrench 7 mm
Wrench 5 mm
Parts required NPM board, G2226-66530, exchange part number G2226-69530
Connector Description Connector Description
S1 Configuration switch
J1 GPIB P11 AIV - A
J2 CAN connector P15 Leak sensor
J3 CAN connector P16 Damper
J4 RS232 P17 Fan
J5 Remote P18 Interface board
J6 Analog output P21 Encoder B
P2 Power supply P20 AIV-B
P8 Motor B P22 Solvent Selection Valve
P12 Motor A P9 EMPV
P14 Encoder A P19 Flow sensor
When removing connectors, counterhold on connector J3 with one hand.
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