Repair manual

Block 35
Block 36
Block 37
Block 38
Block 39
Block 40
Block 41
HF safeguard
Torch button
Pilot arc activation
HF filter
Solenoid valve 1,Solenoid valve 2 and hf activation.
HF Generator
Solenoid valve 1
Consisting of:D3, K4, C9, C8 (hf filter board)
The HF safeguard is powered by block 34 (auxiliary
transformer), at the instant when block 36 (torch button) is
pressed relay K4 sends the signal to block 19
(microcontroller), which will process this information. The hf
safeguard also separates the control board from the high
frequency so as to prevent the residual signal from the torch
buttoncables from entering the board.
Consisting of:plasma torch
Activatingtheplasmatorchbutton will strike the pilot arc.
This signal is scaled down so that it can be processed and
compared in block 17 (adder).
Consisting of:Q8, K1(control board) and K3 (hf filter board).
When the torch button is pressed block 19 (microcontroller)
sends a signal to block 37 which, with the aid of block 38 (hf
filter), generates the pilot arc.
Consisting of:R1, R2, C2, C2A, C3, C4 and C5 (hf filter board).
The signal arriving from block 10 (inductance shunt) is filtered
and conveyed to block 37 (pilot arc activation).
Consisting of: Q8, Q7, Q6 (control board) and K1, K2, K3
(auxiliarycontrol board)
When the torch button is pressed block 19 (microcontroller)
sends 3 signals to block 39 which will adjust them for piloting
blocks 40 (hf generator), 41(solenoid valve 1) and 42 (solenoid
valve2).
Consisting of:hf board
By means of a signal from block 39 (hf solenoid valve
activation) this block produces a high frequency signal that is
then sent to block 12 (hf transformer).
Consisting of:Y1
When the torch button is pressed solenoid valve Y1 is
energised, causing air outfeed which will allow the pilot arc to
5
SUPERIOR PLASMA 90 HF
(6) CHOPPER
(6)
CHOPPER
(13)
DRIVER
IGBT THERMOSTAT
Input filter board
Primary board
ILLUSTRATIONS
(1) EMC FILTER
(2)
VARISTOR
(1) EMC FILTER
(5)
FILTER
OPTO
ISOLATOR
(U1,U2, ISO2, ISO3)
(4) PRECHARGE
(3) RECTIFIER
BRIDGE