Drive Pcb Stack: Power Pc Board (Lower Pcb) - Dentsply Sirona Cavitron 300 Series Service Manual

4. Carefully cut the nylon cable tie and unplug the
4-wire connector (back-left) from J104 on the
PSOC PC Board.
PSOC PC Board Stack
Nylon
Cable
Wrap
5. Carefully lift off the PSOC PC board. Keep the PC
board level as it is raised to prevent bending the
pins on the connectors. Handle the PC board by
the edges only.
6. Carefully align the pins on the replacement PSOC
PC board with the connectors on the power board.
Keep the board level and slowly insert the pins
until they are fully seated.
7. Re-connect the 5-wire and 4-wire connectors onto
the PSOC PC board.
8. Be sure the (back left) 4-wire harness to the USB
PC board is fastened with a nylon cable tie. See
photo above.
9. On the back of the cover assembly, plug the two-
wire connector into J1 and the 5-wire connector
into J2 from the FPGA PC board. Ensure the two
wire harnesses are tied together with a nylon
cable tie.
10. Align and place cover assembly on the scaler unit.
11. Plug the power cord into the power entry module.
12. Reconnect the blue water hose to the push-lock
water fitting.
13. Power up the unit using the power rocker switch
and test unit operation.
14. Calibrate and final test the Cavitron
Scaler using the Dentsply Sirona Preventive -
Product Service Standard Operating Procedure,
PS-00211.
15. Align the Cover on the Bottom Housing and
securely fasten the four (4) #6 x 1/2" Hi-Lo Torx
screws using a screwdriver.
H. Power PC Board Replacement:
(Lower PC Board Assembly)
Plug
4-wire
connector
into
J104
Plug
5-wire
connector
into
J13
1.
2.
3. Unplug the 5-wire connector (front-right) from J13
4. Carefully cut the nylon cable tie and unplug the
5.
6. Carefully lift off the PSOC PC board. Keep the PC
7.
8. Replace the Power PC board. The large white
9. Install the replacement Power PC board on the
10. Carefully align the pins on the PSOC PC board
300 Series
®
11. Re-connect the 5-wire and 4-wire connectors
12. Plug the white 8-wire connector in the front of the
13. On the back of the cover assembly, plug the two-
Follow the steps above in Section A for "Top Cover
Removal."
Ensure that the power cord has been unplugged
from the rear power entry module.
on the PSOC PC Board.
4-wire connector (back-left) from J4 on the PSOC
PC Board.
Unplug the white 8-wire connector from the front
of the Power PC board.
board level as it is raised to prevent bending the
pins on the connectors.
Use a #1 Phillips screwdriver and remove the two
(2) #4-40 x 1/2" machine screws on the Power
PC board.
connector should be in the front.
metal studs. Apply Loctite 242 Threadlocker to
the two (2) #4–40 x 1/2" machine screws. Install
screws on the upper-right and lower-left holes.
Torque them to 2 + 0.5 in.-lbs.
with the connectors on the power board. Keep
the board level and slow insert the pins until they
are fully seated.
onto the PSOC PC board. Use a nylon cable tie
to fasten the 4-wire harness to hole in the PSOC
PC board.
Power PC board.
wire connector into J1 and the 5-wire connector
into J2 from the FPGA PC board. Ensure the two
wire harnesses are tied together with a nylon
cable tie.
Power
PC Board
Assembly
(Lower)
Terminal Strips
for PSOC PCB
8-Wire
Connector
15