Söring Arco-3000 - Service Adjustments of the Modules; Adjustment of High Power Supply; Adjustment of Coagulator Module

25/08/2004 © Söring Service-Manual Arco- and RF-units
1
not valid for A-3000/ -2000
2
not valid for Arco-2000
-66-
3
not valid for MBC600
4
not valid for Arco-1000
12.5. Service adjustments of the modules
Service adjustments have to be made at the following boards:
-High power supply
-Coagulator module (spray function)
-Cut module
12.5.1. Adjustment of high power supply
1. Necessary equipment
- Digital voltmeter
2. Adjustment
- Adjustment of output voltage
-- Set equipment to CUT step 5, 320W without blend and activate push button at
handpiece. Adjust output voltage to 100V ±1V with potentiometer P3
(measurement at J3, pin 4 and 5 at the power supply). The handpiece is
activated without load.
- Adjustment of current limiting
-- the current limiting has been precisely adjusted at the factory and shall only be
readjusted, in case P2 has been turned inadvertently or if limiting is activated
during RF-cutting although the module is intact and if the fuse on the mains
relay board frequently blows.
-- measure voltage at pin 2 U8 to ground and adjust to -1.0V.
12.5.2. Adjustment of coagulator module
Remark:
- With equipment of Arco-series the pulse frequencies, which are of influence on the
output power, are delivered from the synchro-board. Here, together with the
coagulator module, first the frequencies and then the pulse rate have to be
adjusted. For equipment of MBC-series (without a synchro-board) this is does not
apply.
Necessary equipment
- RF-power meter with load resistors of 100 and 200
Ω , measuring range up to 200W
m+i0um
Frequency meter, measuring range 0 to 100kHz (e.g. appropriate DMM)
- RF-Handpiece resp. argon handpiece for open surgery.
Adjustment procedure
Adjustment of synchro-board
1
- connect frequency meter to source and gate of T8 on coagulator module (T8 is the
right big transistor on the board). Leave the power meter connected and select
200
Ω load.
- Select Argon step 1, start equipment and turn potentiometer P2 on synchro board
for 14 ±0.5 kHz.
- Select Argon step 5 and set power selector to 120W. Start equipment and turn
potentiometer P1 on synchro board for 70 ±2 kHz.
- synchro-pulses (15 kHz, 5µsec,1V
ss
) into BNC-socket (monitor signal)