OWNERS
MANUAL
June
1995
FORM:
OM-156
165B
IGBT/MOSFET
Tester
156
114
Use
above
FORM
number
when
ordering
extra
manuals.
£~
WARNING
ELECTRIC
SHOCK
can
kill;
SIGNIFICANT
DC
VOLTAGE
exists
after
removal
of
input
power.
Do
not
touch
live
electrical
parts.
Turn
Off
welding
power
source,
wait
60
seconds,
measure
voltage
on
input
capacitors
according
to
Technical
Manual,
and
be
sure
voltage
is
near
zero
before
making
or
changing
meter
lead
connections
and
before
touching
any
parts.
1-1.
IGBT/MOSFET
Tester
Information
on
circuit
boards.
STATIC
ELECTRICITY
can
Put
on
grounded
wrist
strap
boards
or
parts.
Use
proper
static-proof
bags.
damag
BEFORE
e
parts
handling
Have
only
qualified
persons
familiar
with
and
following
standard
safety
practices
perform
troubleshooting
procedures.
smwarn2.5
10193
1
IGBT/MOSFET
Tester
1
2
3
Before
use,
install
9
volt
battery.
Yellow
To
check
battery,
connect
Red
and
Black
leads
together;
test
light
(LED)
=
On;
battery
okay.
.
2
Test
Button
3
Test
Light
(LED)
Black
~
Red
S0880
1-2.
IGBT
Power
Module
Testing
Procedure
~
Step
1.
Check
IGBT
module
for
GI
(BI)
:
cracks
in
side
of
case
or
a
separa
tion
of
case
from
its
base
plate.
a
Static
Hazard.
Replace
any
damaged
part.
Put
on
grounded
wrist
strap.
Step
2.
Mark
and
disconnect
leads
from
Cl,
C2/E1,
and
E2
terminals.
Step
3.
Disconnect
gate
lead
plug
from
circuit
board.
Step
4.
Hook
up
ALL
tester
leads
to
perform
Test
1.
LED
On
=
Shorted;
replace
part
Step
5.
Press
button.
LED
Off
=
Fails
test;
replace
part
LED
On
=
Passes
test
Step
6.
Repeat
Steps
4
and
5
for
Test
2.
G1
(B1)
Gate
1
orBasel
G2
(B2)
Gate
2
or
Base
2
Cl
Collector
1
02/El
Collector
2/Emitter
1
E2
Emitter
2
ST-801
132/
S.0880
/
S-0664
Test
1
1-3.
MOSFET
Power
Transistor
Testing
Procedure
G
Gate
D
Drain
S
Source
S-08801
S-0663
1-4.
Electrical
Diagrams
1-5.
Parts
List
Dia.
Part
Mkgs.
No.
Description
Quantity
Complete
Assembly
Dl
. . .
083
850
...
LIGHT,
md
red
lens
2V
LED
1
P81
...
175
389
...
SWITCH,
PB
MC
NO
SPDT
1OA
115VAC
1
Ri
.
. .
078
431
...
RESISTOR,
C
.25W
330
ohm
1
R2
. . .
072
561
...
RESISTOR,
MF
.25W
267K
ohm
1
. .
R3
. .
081
833...
RESISTOR,
CF
.25W
2.7
meg
ohm
1
R4
. . .
092
648...
RESISTOR,
WW
fxd
zero
ohm
1
iT.
.
. .
038
785
...
STRIP,
terminal
3P
solder
1
157
475
...
CASE
SECTION,
top/sides
1
157
476
...
CASE
SECTION,
bottom/ends
1
156 170
...
HOLDER,
battery
9V
1
138
044
...
BUSHING,
strain
relief
.120/.150
ID
x
.500mtg
hole
1
604
825
...
CABLE,
port
No.
18
3/c
(order
by
if)
2ft
173
771
...
CLIP,
alligator
2
173774...
CLIP,
micro-gator
1
173
772
...
INSULATOR,
alligator
clip
(red)
1
173
773...
INSULATOR,
alligator
clip
(black)
1
173
775...
INSULATOR,
micro-gator
clip
(yellow)
1
a
Static
Hazard.
Put
on
grounded
wrIst
strap.
D
Red
Step
1.
Remove
transistor
from
circuit
board.
Step
2.
Hook
up
ALL
tester
leads.
LED
On
=
Shorted;
replace
part
Step
3.
Press
button.
LED
Off
=
Fails
test;
replace
part
LED
On
=
Passes
test
Ls
B/G
23
II
0
0
0
2
/
51/
54
BLIC
YEL
Circuit
Diagram
5A-156
115-B
Wiring
Diagram
RED
5A-156
116-A
OM-156
165
Page
2
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