3
TECHNOLOGY TIG
1) Clean and visually check the
inverter
2) Checking the power and signal
cables.
3) Electrical measurements while the
machine is off.
Open the inverter shell and clean thoroughly using
compressed air.
Dirt is dangerous mainly in the power areas of the inverter
which are subject to high voltage or for those components
galvanically separating the primary from the secondary.
Thus, check carefully the following components:
Clean and check whether on the primary coil there are cuts or
cracks which could jeopardize the insulation of the secondary.
(Tig 165 DC/HF version.).
code 112478
(Tig 165 DC/HF version)
with high silicone insulation which connect the
H.F. transformer to the filter board and from the filter board to
the inverter shunt. (Tig 165 DC/HF 165 version.)
Check whether on the power transformer T1 or near
connector Jp1 there are signs of burns.
Visually check the post-gas and the gradual decreasing
of current potentiometers, the 2-4 phases electrode
and relays k1, k2.
These components must NOT have signs of dents, in
particular, the rotation of the potentiometers shaft
must be perfect and free from mechanical slacks.
(see Technology Repairs Manual)
(see Technology Repairs Manual)
( see Technology Repairs Manual )
(see Technology Repairs Manual)
check the cables fasten on connectors
J1, J2, J3. Specifically, check carefully the wires of connector
Jp1 in that there are subject to alternating network voltage.
check Cn01, Cn02, Fs01, Fs02
(See Technology Repairs Manual.)
1) H.F.Transformer:
2) H.F. Filter
3) H.F. Box
4) Electrovalve
5) Check cables
(See figure 2.)
A)
B)
7) Primary board:
8) Secondary board:
(See Figure 3-5)
1) Primary board:
2) Secondary board:
3) Tig control board:
4) Filter board:
(see Figure 2).
cod. 112488
6) Control board Tig:
4) Electrical measurements while the
machine is in operation.
1)
(see figure 2).
2)
(See Figure 1.)
3)
4)
Warning!
the technology 114187 primary board cannot be mounted
on this machine.
5)
6)
- Jp1 Connector
- J2 Connector
- J1 Connector
7) Checking the operation of H.F. filter board, code 112478.
8) Checking the operation of tig control board, code 112488.
Disconnect the power supply cables of H.F. Box
Shortcircuit Jp2 on the primary board by means of a jumper
(placed between the SMD board and the electrolytic
condensers.
Remove all connectors from the tig control board. The inverter
is now set to work as a technology 165 with the switch located
on the front panel, in a central position ("hard welding").
Now follow the repair and test procedures of the inverter,
keeping in mind the following information:
1) the yellow led is not present on the board
2) the inverter carries the arc force and hod start functions.
Although the repair and test procedure are similar,
Remove the shortcircuit from Jp2 and put the connectors,
which were previously taken off from the tig control board, in
their places.
Switch the inverter on and check the following power supplies
on the tig control board:
Tester set in Vac
1) Place test prods on pins 1, 2 and you should have
220 Vac */- 10%
Tester set in Vac
Place test prods on pins 7, 8 and you should have 9
Vac +/- 10%.
1) Place negative test prod on pin 2 (mass) and
positive test prod on pin 1. The voltage should be +12
V +/- 3%.
2) Place negative test prod on pin 2 and positive test
prod on pin 3. The voltage should be -12 V +/- 3%.
- Ensure that the trimmer of pre-gas R 64 is rotated
counterclockwise.
Insert the tig torch and set the tig at two phases, press the torch
push-button. The electrovalve should be excited and, after a
short delay, the high frequency should be excited too. If this does
not happen, shortcircuit pins 1, 2 on connector J2.
If both the electrovalve and the high frequency are excited, it
means that there a failure on the filter board, probably due to the
following components:
a) Bridge rectifier P01.
b) Relay Rl 1
c) The alternating voltage 9 V on connector Cn 01 pin 7,
8 is missing.
d) The wire on the torch is cut off.
A J4 jumper is mounted on this board (see Figure 3), which
allows you to select two operation modes:
precedentemente tolti dalla scheda controllo tig.
Guide to repair of the inverter Tig
