6.2
Hand Piece
Assembly
6.3
Generator and
Foot Switch
Chapter 6 - Detailed Diagnostics
continued
The following is a list of the equipment required in order to perform this level of testing:
1.
A digital voltmeter (FLUKE model 45 or equivalent) with insulated test probes
and clips.
2.
A dual channel oscilloscope with x10 probes.
3.
An autotransformer adjusted for nominal line voltage (115 or 230 volts).
4.
A means of "floating" the generator ground - i.e. breaking the safety ground
connection at the line cord.
NOTE: For all the following tests, it is helpful to refer to the appropriate wiring diagram
(115 VAC or 230 VAC) located in Appendix B.
The majority of problems with hand pieces are covered in section 5.1, the Trouble Shooting Guide. The Hand Piece
itself is a permanently assembled device with no internal components that are serviceable. The Hand Piece has a
limited life and will eventually "wear out."
Because the sub-assemblies of the Hand Piece are inaccessible, this test verifies some aspects of continuity. This
test will partially determine if the Hand Piece has an open wire only but will not check all wires and will not
determine if the Hand Piece is worn out.
Hand Piece Models HP050, HP051, HPTUV, H1TUV
With the Hand Piece unplugged from the Generator:
Verify continuity between pins 4, 6, and 7 in the Hand Piece electrical connector.
For Models HP050 and HP051, verify continuity between pin 1 and the tip of the blade (see Figure 3 for pin
location.
For Models HPTUV and H1TUV, verify continuity betwen pin 2 and the tip of the blade (see Figure 3 for pin
location.
If an open wire is detected in a domestic hand piece (models HP050, HP051), un-screw the back of the electrical
connector and check for any broken wires. If breaks are noticeable, repair the connector in accordance with Figure
3. If no breaks are noticed or an international hand piece is being tested (permanently assembled connector), no
further testing can be performed. Replace the hand piece.
Hand Piece Models HP052, HP053, H2TUV, H3TUV
With the Hand Piece unplugged from the Generator:
For Models HP052 and HP053, verify continuity between pin 1 and the tip of the blade (see Figure 3 for pin
location.
For Models H2TUV and H3TUV, verify continuity betwen pin 2 and the tip of the blade (see Figure 3 for pin
location.
There is no method for repairing these hand pieces. If defective, these hand pieces must be replaced.
Access to the internal generator modules requires disassembly of the Generator. Remove the power cord and the six
phillips head machine screws from the bottom of the Generator enclosure and remove the top portion of the
enclosure shell.
The internal generator modules are now exposed. Additional disassembly may be necessary depending upon the
level of testing required.
Verify that the Hand Piece, Foot Switch, and instrument blade are appropriately attached to the Generator.
Proceed through the following sections until the problem module is identified.
17
6.1
Test
Equipment
