130
Diagnosis procedure
Check procedure for power inverter.
NOTE:
in this procedure, level 1 diagnostics
does not always
permit identification of the fault. You are therefore advised to perform
an
accurate visual check
on each power component or switch to
level 2 diagnostics
.
IMPORTANT!: breakage of the inverter can cause breakage of the input rectifier bridge and you are therefore advi-
sed to follow the diagnostic phases in the sequence given in this manual.
(level 1)
Stage 1 : Disconnect the machine from the mains.
Remove the upper cover of the machine.
Disconnect cables no.22 and no.23 from board 15.14.254 (and insulate the terminals).
Connect a wire between TP6 and TP3 (undervoltage protection bypass).
Checks :
Visual check: no traces of burning on the power IGBTs or on board 15.14.254
yes
: go on ;
no
: replace part 14.60.060
With a multimeter set to diode testing, check between the points of board 15.14.254 :
D-S from IG1 to IG6
=
OPEN
S-D from IG1 to IG6
=
approx. 0.4V
With a multimeter set to Ohm, check between the points of figure:
G-S from IG3 to IG6
=
10 kOhm
G-S of IG1 and IG2
=
22 Ohm
yes
: go on ;
no
: replace part 14.60.060
(level 2)
Stage 2 : Machine connected to mains.
Front panel selector set to MMA.
Close the master switch.
Checks : With an oscilloscope set to:
Time scale =
5 us
Amplitude scale =
5 V
Measure:
G-S of IG4 and IG6
=
oscillogram no.1
G-S of IG3 and IG5
=
oscillogram no.2
G-S of IG1 and IG2
=
oscillogram no.3
yes
: go on ;
no
: replace part 14.60.060
NOTE :
the signals of the previous oscillograms will be slightly unstable in frequency.
Stage 3 : Switch the machine off and disconnect from the mains.
After waiting a few minutes, reconnect cables no.22 and no.23 to board 15.14.254.
(
Important! Red cable to + screw and black cable to - screw)
Reconnect the machine to the mains.
Close the master switch.
Checks : With oscilloscope set to:
Time scale =
5 us
Amplitude scale =
100 V
Measure:
D-S of IG6
=
oscillogram no.4
D-S of IG5
=
oscillogram no.5
yes
: go on ;
no
: replace part 14.60.060
NOTE :
the frequency of the signals is f = 51.5 (+/-1) kHz .
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...
