Service manual

- alsa apparecchi medicali s.r.l. -
Pag. 8
(TP “K”)
0
4)Activate again the unit, setting function “monopolar SPR”. You should obtain the following wave form
(pulse width equal to 1 ms (±10 ns), if necessary calibrate the R15 pot:
(TP “K”)
0
5)Activate again the unit setting on mod. 400 and 250 function “bipolar PC”, or on mod. 350 and 200 function
“bipolar MP”. You should obtain the following wave form (duration equal to 315 ns (±15ns), if necessary
calibrate the R14 pot):
(TP “K”)
0
ATTENUATION OF PULSE WIDTH (IN THE SPRAY AND FULGURATION
FUNCTIONS)
To start the following tests perform the selection detailed in the table below
Setting Memory Monopolar Cut Display Monopolar Coag. Display
M II
06
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(To perform this test it is necessary a set of cables (wiring for assistance) needed to connect
the R.F. power board placed out of the device so that can be reached easier for any need of
calibration).
1)Disconnect both the standard wiring and the J5 connector on the Power Supply Board and position
the R.F. power board out of the unit. Connect it using the “wiring for assistance” (J5 must be not
connected).
Connect the probe of channel no. 1 of the oscilloscope to TP ”L” (R12) on R.F. power board and the
probe of channel no. 2 to TP “M” (R37) of the same board.
2)Select M I
3)Set the function “monopolar SPR”, activate the device and check the wave form. It should be as
follows:
e