DENTSPLY Cavitron JET Plus Installation And Service Manual page 44

Powder Bowl
Assembly
Molded
Overlay
Info Center PCB
J Air manifold Assembly Replacement:
1. Follow the steps above in Section A for "Top Cover
Removal".
2. Unplug the Top Cover ribbon cable at J5 on the Power
Drive PC board and place the Top Cover to the side.
3. Unplug the blue water hose assembly at the source
and relieve the water pressure by depressing the quick
disconnect tip in a suitable container. Disconnect the
blue water hose at the rear of the unit by fully
depressing the gray connector ring and gently pulling
out the hose.
4. Unplug the black air hose assembly at the source and
relieve the air pressure by depressing the quick
disconnect tip. Disconnect the black air hose at the
rear of the unit by fully depressing the connector ring
and gently pulling out the hose.
5. Remove the plastic barrier from the unit. Pull the
plastic barrier away from the heatsink to release the
two-sided tape and lift the barrier out of the unit.
6. Unplug the main Air Inlet Solenoid cable at J4 on the
Power Drive PC board.
7. Unplug the Pinch Solenoid cable at J6 on the Power
Drive PC board.
8. Disconnect the clear Pinch Valve tubing from the top
Air Manifold barbed fitting.
9. Disconnect the (upper) Duckbill filter with gray tubing
from the center Air Manifold barbed fitting.
10. Disconnect the (lower) Duckbill filter with the clear
tubing from the bottom Air Manifold barbed fitting.
11. Disconnect the yellow tubing from the bottom Air
Manifold fitting location with the Restrictor barbed
fitting.
12. Cut the cable tie and release the Snap-On Ferrite block
on the Water Regulator/Solenoid. Unplug the
Handpiece cable connector from the Power Drive PC
board at J3.
Main Controller Board
Potentiometer
Folded
Harness
Ribbon Cable
13. Use a screwdriver and remove the two #6 x 1/2"
Hi-Lo screws at the front corners of the Air/Water
chassis assembly. Carefully lift up the chassis.
14. Lift up the bracket and use a screwdriver to remove
the two #6-32 x 5/16 screws under the Air Manifold
Assembly. Position the replacement Air Manifold
assembly over the same mounting bracket holes and
fasten with the removed Phillips screws. The three
(clear, yellow & red) tubes from the powder bowl
assembly and the Handpiece water tube should
be routed between the Air Manifold and the Pinch Valve
assemblies.
15. Route the two pairs of solenoid wires down and under
the black air inlet on the Air Manifold housing. Tie
them to the Air Manifold block with a cable tie.
16. Lower the mounting bracket and slide it back under the
molded tab located adjacent to the water inlet hole.
Install the two #6 x 1/2" Hi-Lo screws at the front
corners of the Air/Water chassis assembly and fasten
the bracket to the Bottom Housing. The Ground wire
terminal must be reinstalled over the left mounting
bracket tab. Place the lock-washer between the screw
head and the Ground wire terminal. Be sure wires or
tubing are not trapped under the bracket.
Bleed Air
Needle Valve
Air Supply
Inlet
17. Route the yellow tube on top of the Pinch Valve
assembly and plug it onto the bottom Air Manifold
Restrictor barbed fitting.
18. Re-connect the Duckbill filter with clear tubing onto the
(bottom) forward-facing barbed fitting.
19. Re-connect the Duckbill filter with grey tubing onto the
(center) forward-facing barbed fitting. Refer to the
drawings in Section M.
20. Re-connect the clear Pinch Valve tubing onto the
top Air Manifold barbed fitting. Replace any damaged
or deteriorated tubing as needed.
21. Route the two pairs of Air Solenoid wires under the
blue inlet supply hose. Plug the main Air Solenoid cable
connector to J4 on the Power Drive PC board. Plug
the Pinch Solenoid cable connector to J6 on the Power
Drive PC board.
42
Clear Tube-
Pinch Valve
Gray Tube-
Duckbill Filter
Clear Tube-
Duckbill Filter
Air Pressure
Yellow Tube-
Regulator
Powder Bowl