1100 Series Nano Pump Service Manual 147
Repairing the Pump 3
Exchanging the Power Supply
1 Remove the pump from the stack, remove the front cover, top cover and top
foam section (see “Removing the Top Cover and Foam” on page 131).
2 Remove the EMPV. For this disconnect first:
• the capillary going to the flow sensor.
• the capillary coming from the filter.
• the waste tube.
• the connector.
3 Remove the flow sensor. For this disconnect first:
• the capillary coming from the EMPV.
• the capillary on the injection device (port 1).
• the connector.
4 Unclip the mixing chamber from its holder.
5 Remove the damper and the Z-panel. For this disconnect first:
• the mixing capillary.
• the capillary going to the mixer.
• the active inlet valve cable at the Z-panel.
• the connector (P16, P11, P20) at the main board (see Figure 22 on page
135).
6 Remove both pump assemblies. For this, disconnect first:
• the capillary coming from the mixing chamber.
• the connecting tube coming from the solvent selection valve.
• the connector (P8, P21 and P12, P14) at the main board.
Frequency If defective
Tools required • Screwdriver Pozidriv #1
• Wrench 1/4 inch
• Wrench 14 mm
• Wrench 7 mm
• Wrench 5 mm
Parts required Power supply 0950-2528
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