Changing / Cleaning The Venturi Restrictors - Citronix ci5200 Technical & Service Manual

Changing / Cleaning the Venturi Restrictors

The Venturi Restrictors may require cleaning or replacement due to the nature of the operation and size
of the opening.
1. Remove the Manifold from the Ink tank as described in the previous step (Changing / Cleaning the
Pressure Restrictor)
2. The Venturi Restrictors are located behind the Grub screw on the left front side of the Manifold
(shown below in Pic 1). It is necessary to remove this grub screw to gain access to the restrictors.
To remove the grub screw, loosen with a 1/8" allen wrench and remove.
3. Once the grub screw has been removed, use a 1/16" hex key (003-1051-001) and remove both of
the Venturi restrictors.
4. The manifold is threaded only a short way. If either Venturi restrictor does not come out on the end
of the hex key, turn the manifold down and gently tap it until the insert falls out.
5. Clean or replace the restrictors ensuring to replace them in the correct order (see Pic 3 below).
Before reinstalling, hold them up to the light to ensure that they are clean.
6. The restrictors must be screwed into the manifold to a precise depth. This is accomplished by first
removing the Vacuum valve.
7. Looking into the first hole of the valve, screw in PJ1 (.063 restrictor) until it is covering 80%of the
hole with the open section closest to the back of the printer (see Pic 3 for this detail).
8. Now take JP2 (.029 restrictor) and screw in behind JP1 until it touches PJ1 then screw it back
(counterclockwise) 2 ½ turns.
9. Replace the gutter valve and the Grub screw until the grub screw o-ring can be seen around the
head of the grub screw. DO NOT overtighten as this can cause damage to the Ink Manifold.
10. Reinsert the Ink Manifold back into the Ink tank and make sure the manifold gasket seals all the
way around and is flat between the tank and Manifold and secure the two manifold locking cams
by turning them ¼ turn clockwise.
11. Reinsert the Ink Manifold and tank assembly back in place and secure the tank hold down screw.
12. Refit the fill tube into the quick disconnect on the manifold.
13. Refit the back cover and tighten the locking cam.
Version 0.1
ci5000 Series Printer Technical Service Manual
6-77