DENTSPLY Cavitron JET Plus Installation And Service Manual page 42

6. Unplug the BLK-RED wire connector at J1 on the Power
Drive PC board.
7. Use a screwdriver and remove the two #6 x 1/2" Hi-Lo
screws at the back corners of the Power Supply
assembly.
8. Lift and slide the Power Supply assembly toward the
rear of the unit to disengage it from the front mounted
tabs and remove.
9. Inspect the Bottom Housing for the presence of the
two D-section support cushions. Replace if damaged
or missing.
10. Position the replacement Power Supply assembly with
the RED-BLK wire connector at the rear.
24 Volt DC
Connector
Ground
Connection
11. Slide the Power Supply assembly under the front
molded tabs on the Bottom Housing and fasten with
the two #6 x 1/2" Hi-Lo screws at the back of the
assembly.
12. Reconnect the RED-BLK wire connector to J1 on the
Power Drive PC board.
13. Reconnect the BLK-WHT mains voltage wires from the
rocker switch to the Power Supply connector. Install
the Ground wire to the tab at the right front corner on
the Power Supply. Ensure all connectors are fully
seated.
14. Align the plastic barrier with the Bottom Housing
and fully seat it. Replace the two-sided tape, if
necessary, to secure the plastic barrier to the heatsink.
15. Reconnect the ribbon cable at J5 on the Power Drive
PC board. Support the Top cover to prevent
damage to the cable.
16. Calibrate and final test the Cavitron
using DENTSPLY Professional - Product Service
Standard Operating Procedure, PS-00176.
17. Align the Top Cover on the Bottom Housing and
securely fasten the six #6 x 1/2" Hi-Lo screws using
a screwdriver.
Power Supply
Assembly
Screws
AC Power
Supply Harness
Connector
JET Plus unit
®
G Power Drive PC Board 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. Remove the plastic barrier from the unit. Pull the
barrier away from the heatsink to release the two-sided
tape and lift it out of the unit.
4. Unplug the BLK-RED wire connector from the Power
Drive PC board at J1.
5. Unplug the Handpiece Cable assembly at J3 on the
Power Drive PC board.
6. Unplug the Water Regulator/Solenoid assembly cable
at J2 on the Power Drive PC board.
7. Unplug the main Air Inlet Solenoid assembly cable at J6
on the Power Drive PC board.
8. Unplug the Pinch Solenoid assembly cable at J4 on the
Power Drive PC board.
9. Use a screwdriver and remove the two #6 x 1/2" Hi-Lo
screws at the back corners of the Power Supply
assembly.
10. Use a screwdriver and remove the two #8-18 x 1/2"
Hi-Lo heatsink bracket screws at the bottom. Tilt
the Power Supply assembly up to allow the Power
Drive PC board to be lifted out of position. Remove
the Power Drive PC board/heatsink bracket assembly
from the unit. The Power Drive PC board, pink Sil-pad
and heatsink bracket are manufactured, tested and
available only as a complete assembly.
Power Drive
PC Board
24 VDC
Power
Supply
Assembly
11. Lower the replacement Power Drive PC board
assembly back into the Bottom Housing. Use caution
to prevent damage to connector J7 on the back of the
Power Drive PC board.
12. Securely fasten the Power Drive PC board assembly
with the two #8 x 1/2" Hi-Lo screws using a
screwdriver. Install and tighten the two #6 x 1/2"
Hi-Lo screws in the Power Supply assembly.
13. Reconnect the Pinch Solenoid cable to J6, the
Handpiece cable to J3, the Water Regulator/Solenoid
at J2 and the main Air Solenoid to J4. (The Pinch
Solenoid was designed with a longer cable to reach the
J6 position.)
14. Reconnect the BLK-RED wire connector from the Power
Supply Assembly to J1. Be careful not to hit the
capacitor on the left side of the Power Drive Bracket
assembly.
40
Screw
Locations