Utah Medical Products Finesse ESU-110, Service Manual

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adjust R362 until output power is 60 watts. For models with-
out R362, skip to the next step.
6.4 Activate “CUT” mode and adjust R333 until measured output
is 99 watts.
6.5 Adjust “CUT” output setting to ‘30’ and activate “CUT” switch.
Adjust R333 to 30 watts, if necessary.
6.6 Set “CUT” output setting to ‘99’ and activate “CUT” switch.
Adjust R142 to 99 watts output. Repeat steps 6.5 and 6.6
until no adjustment is necessary.
6.7 Disconnect active electrode from the electrosurgical analyzer,
activate the “CUT” switch and observe waveform. The wave-
form should be clean and have sharper and higher peaks on
the positive side compared to the negative side.
6.8 Reset cut mode display to '99' and coag mode display to '75'.
6.9 Reconnect the active and dispersive pad leads to the electro-
surgical analyzer.
6.10 Switch unit to "BLEND 1" mode. Activate cut switch and
adjust R144 to get 99 watts output.
6.11 Switch unit to "BLEND 2" mode. Activate cut switch and
adjust R146 to get 99 watts output.
6.12 Switch unit to "BLEND 3" mode. Activate cut switch and
adjust R148 to get 99 watts output.
6.13 Set "COAG" power to 75 watts. Activate coag switch and
adjust R150 to get 75 watts output.
7.0 SAFETY SHUTDOWN CIRCUIT CALIBRATION
7.1 Set output mode to "CUT". Remove the dispersive pad con-
nection to the electrosurgical analyzer. If R363 is present on
board, activate cut mode and adjust R363 until voltage at TP2
is 2.5 volts.
7.2 Activate “CUT” mode and adjust R351 until voltage at TP2 is
3.0 volts.
7.3 Turn unit off and short pin 1 to pin 16 (these are the only two
pins on the top side of the chip) of opto-isolator U301 to dis-
able the feedback opto-isolator.
7.4 Turn unit back on. Press cut switch and verify that the unit
makes a constant high pitched tone.
7.5 Turn the unit off and remove the short from U301.
7.6 Turn unit on. Verify that the unit does not alarm when coag is
activated into an open circuit.
8.0 Calibration Verification
NOTE: Do not exceed 10 seconds of output power activation
in any given 30 second period when verifying output calibra-
tion.
8.1 Set unit output mode to "CUT". With the cut mode output
settings shown in the checksheet, measure the output power
and verify that these fall within ±15% or ±5 watts of the dis-
played setting, whichever error is greater.
8.2 Repeat section 8.1 for "BLEND 1" mode.
8.3 Repeat section 8.1 for "BLEND 2" mode.
8.4 Repeat section 8.1 for "BLEND 3" mode.
8.5 Repeat section 8.1 for "COAG" mode.
9.0 Open Circuit Safety Circuit Trip Test
9.1 Disconnect the active and dispersive leads from the electrosur-
gical analyzer.
9.2 Activate the cut mode switch for five seconds with the cut
mode output settings at '30' and '99' with the unit set in "CUT"
mode. Verify that the alarm circuit does not activate.
9.3 Repeat section 9.2 for "BLEND 1" mode.
Finesse Service Manual
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