Agilent Technologies 1100 Series, Service Manual

Page: 162 / 288

150 1100 Series Nano Pump Service Manual
3 Repairing the Pump
7 Disconnect the fan cable (P17) at the main board.
8 Remove the solvent selection valve. See “exchanging the solvent selection
valve” in this chapter.
9 Remove the CSPM board. Disconnect the remaining connectors, see
“exchanging the high pressure pump main board in this chapter.
10 Push the leak sensor cable through the recess of the solvent selection valve
and lift out the bottom foam.
11 Unclip the leak pan and place it in front of the nano pump.
12 Pull the leak sensor out of the leak pan and lift the cable out of the metal
plate.
13 Place the new leak sensor into the leak pan, see Figure 24 and replace the
pan. Make sure that the cable is located in the recess of the bottom metal
plate.
14 Reinstall the bottom foam. Make sure that the leak senor cable is guided
through the foam to the top side.
15 Replace the main board, see “Exchanging the Nano Pump Main Board (NPM
Board)” on page 134.
16 Re-install the solvent selection valve.
17 Re-install the two pump head. Reconnect the capillaries and the cable.
18 Re-install the Z-panel and the damper. Reconnect the capillaries and
connectors. (P16, P11, P20)
19 Re-install the mixing chamber to its holder.
20 Re-install the flow sensor. Reconnect the capillaries and the cable.
21 Re-install the EMPV. Reconnect the capillaries, the waste tube and the
cable.
22 Replace the top foam section, optional interface board, front cover, and top
cover (see “Replacing the Top Cover and Foam” on page 154).