Service manual

- alsa apparecchi medicali s.r.l. -

Pag. 5

In this memory, useful even for calibration and control procedure, the self-test phase is reduced as possible

The “calibration and control EPROM” must be used as follows:

1) Replace, on the Microcontroller board the standard EPROM with the “calibration and control EPROM”

(paying attention to insert it correctly)

2) Turn on the unit and, to start the “control or calibration procedure”, use on the front panel the push button

M selecting memory II (M_II) and (with push buttons up-down of monopolar CUT or COAGULATION) the

type of control or calibration. The code correspondent to the desired test is shown on the display - monopolar

CUT.

For every test or for every series of tests is below detailed (on the correspondent paragraph) the

selection necessary to start the specific procedure (specific tables of setting)

3) Once performed the starting selection, using push button M, select memory I (M_ I) and perform

calibrations or controls (according to the specific instructions below detailed for every test)

General Warnings about the instructions to perform the controls:

a) To activate the unit you have to use the pedal switch needed for the function selected (for example:

monopolar PC with cut pedal of monopolar double pedal)

b) To select a performance you have to use the correspondent push button S (for example: monopolar

pure cut with push button S “function PC” of cut section area “mono”, bipolar pure cut with push

button S “function PC” of cut section area “bip”)

c) The word “code” is used to identify the value or the code set on the displays

d) When one has to use the current probe to check a wave form or a current on the output circuit

connected to a load, the probe must be connected in series to the load

e) To automatically save the calibrations or settings performed it is necessary to switch the unit off. It is

possible to save every single calibration at a time or all together at the end of the procedure

CONTROL OF SUPPLY SECTION (LOW VOLTAGES)

Turn the device on and check on the Power supply board, using a multimeter, if the stabilised +15V (TP

“A”), -15V (TP “B”) and +5V (TP “C”) voltages are present and, if necessary, adjust the R105 pot on the

same board to obtain a voltage of +5V (+0.1/-0V).

CONTROL OF SUPPLY SECTION (VARIABLE VOLTAGE)

RAMP SIGNAL CONTROL

Connect the probe of the oscilloscope to TP ”D” (pin 5 of UC 3525) on the Power supply board, turn the

device on and check if the wave form corresponds to the following:

(TP ”D”)

CALIBRATION OF VALUES OF THE VARIABLE VOLTAGE (MINIMUM AND MAXIMUM)

To start the following tests perform the selection detailed in the table below

Setting Memory Monopolar Cut Display Monopolar Coag. Display

M II

1)Select M_ I.

2)Connect the multimeter to TP “E” (VREG) on Power supply board, set function “monopolar PC” and code

"FF", activate the device and calibrate the R6 pot on the same board to obtain a continuous voltage of 150V

(± 2 V) on VREG.

3)Connect the probe of the oscilloscope to TP “F” (R22) and the multimeter to TP “E” (VREG), set function

“monopolar PC” and code "FE", activate the device and calibrate the R14 pot to obtain a continuous voltage

of 3V (± 0,1) on VREG and the following wave form on TP “F”:

TP “A”: Test Point “A”