Waters Xevo TQ-S Operator's, Overview And Maintenance Manual page 196

4 Maintenance Procedures
3. Use the combined 2.5-mm Allen wrench and cone extraction tool to
loosen the 2 captive screws securing the ion block cover plate.
4. Remove the ion block cover plate.
5. Use the combined 2.5-mm Allen wrench and cone extraction tool to
loosen the captive PEEK terminal block securing screw.
Heater cartridge assembly wires
196 February 28, 2014, 715002212 Rev. C
Ion block cover plate securing screw
Ion block cover plate
PEEK terminal
block securing
screw