Diagnosis procedure
129
Stage 5 : Machine connected to mains power supply
Close the master switch
Front panel selector set to MMA
Checks :
Check:
GREEN led on front panel = ON
yes
: go on ;
no
: perform
power supplies checking procedure
With a tester set to Vdc, check between points:
b-bb = 565Vdc @ 400Vac (=Vin X 2 )
yes
: go on ;
no
: check the condition of the tracks on board 15.14.233
Perform
power inverter checking procedure
and quit the procedure checking that cables no.22 and no.23 are
connected to board 15.14.254 and that the short circuit created by the wire between TP6 and TP3 has been
eliminated
(
Important! Red cable to + screw and black cable to -screw
) .
With a tester set to Vdc, check between points:
c-cc = 80 Vdc
yes
: go on ;
no
: perform
power inverter checking procedure
and
secondary power diodes checking procedure
.
IMPORTANT! When taking this measurement, make sure that MMA operating mode has been selected.
The TIG H.F. test will destroy the instrument applied to the machine output terminals due to the H.F. discharge.
Stage 6 : Select MMA operating mode from the front panel and apply the load 3 + 8 or weld, selecting TIG DC LIFT 2-strokes
operating mode.
Set 120 A via the potentiometer on the front panel.
Checks :
With the shunt on the ground cable and a tester set to mVdc, measure the current delivered:
I = 120 A
yes
: go on ;
no
: perform
current adjustment circuits checking procedure.
Stage 7 : As above.
Gas flow rate = 5-6 l/min , gas pressure = 1 bar.
Red electrode of adequate diameter.
Select TIG DC H.F. 2-strokes operating mode.
Checks :
Check that gas comes out of the torch.
yes
: go on ;
no
: with a tester set to Vac, measure 24 Vac at the solenoid valve terminals.
yes
: replace the solenoid valve ;
no
: replace front panel FP106
Check correct sparking of the arc.
yes
: go on ;
no
:
perform
H.F. generation circuit checking procedure
check
- the condition of the H.F. transformer
- the condition of the connection cable between the H.F. transformer and board 15.14.192
- polarity of connection of above cable to board 15.14.192 according to fig.
- seal of gas circuit inside the machine
Stage 8 : As above.
Checks :
Press each button on the front panel and check that the related led comes on indicating that the function
has been selected.
yes
: go on ;
no
: replace the front panel FP106
Summary of Contents for Genesis 240 TLH
Page 1: ...REPAIRS MANUAL E N G L I S H Genesis 240 Genesis 240 TLH...
Page 9: ...Description of machine operation 91 n m k a o q r l c b i p j d s e f g h e FIG 6...
Page 11: ...Description of machine operation 93 n m k a o q r l c b i p j d s e f g h e FIG 8...
Page 22: ...LAY OUTS OF CARDS...
Page 23: ...Lay outs of cards 105 Card 15 14 233 Fig 20...
Page 24: ...106 Lay outs of cards Card 15 14 236 side A Fig 21...
Page 25: ...Lay outs of cards 107 Card 15 14 236 side B Fig 22...
Page 26: ...108 Lay outs of cards Card 15 14 236 side C Fig 23...
Page 27: ...Lay outs of cards 109 Card 15 14 254 side A Fig 24...
Page 28: ...110 Lay outs of cards Card 15 14 254 side B Fig 25...
Page 29: ...Lay outs of cards 111 Card 15 14 254 side C Fig 26...
Page 30: ...112 Lay outs of cards Card 15 14 254 side D Fig 27...
Page 31: ...Lay outs of cards 113 Card 15 14 192 Fig 28...
Page 32: ...114 Lay outs of cards Card 15 14 239 Fig 29...
Page 33: ...Lay outs of cards 115 Card 15 14 240 Fig 30...
Page 58: ...140 Diagnosis procedure J9 connector frontal side FIG 36 Card 15 14 192 FIG 37...
Page 59: ...Diagnosis procedure 141 FIG 38 Card 15 14 233 FIG 39...
Page 60: ...142 Diagnosis procedure Card 15 14 254 version 1 soldering side FIG 40A...
Page 61: ...Diagnosis procedure 143 Card 15 14 254 version 2 soldering side FIG 40B soldering side view...
Page 62: ...144 Diagnosis procedure Card 15 14 236 FP106 FIG 41...
Page 63: ...Diagnosis procedure 145 FIG 43 H F 15 14 192 wring diagrama FIG 42...
Page 64: ...146 Oscillograms Oscillogram 1 Oscillogram 2...
Page 65: ...Oscillograms 147 Oscillogram 3 Oscillogram 4...
Page 66: ...148 Oscillograms Oscillogram 5 Oscillogram 6...
Page 67: ...Oscillograms 149 Oscillogram 7 Oscillogram 8...
Page 68: ...150 Oscillograms Oscillogram 9 Oscillogram 10...
Page 69: ...Oscillograms 151 Oscillogram 11...
Page 73: ...Parts dismantling and re installation procedure 155 FIG 44...
Page 74: ...156 Parts dismantling and re installation procedure FIG 45...
Page 75: ...Parts dismantling and re installation procedure 157 FIG 46 FIG 47...
Page 76: ...158 Parts dismantling and re installation procedure FIG 48...
Page 79: ...Operating tests and settings 161 Card 15 14 239 FIG 49...
Page 80: ...162 Operating tests and settings Card 15 14 254 FIG 50...
Page 81: ...Operating tests and settings 163 FP106 FIG 51...
