OWNER’S MANUAL
September 1996 FORM: OM-182 878A
Use above FORM number when ordering extra manuals.
IGBT/MOSFET Tester 043 553
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.
STATIC ELECTRICITY can damage parts
on circuit boards.
• Put on grounded wrist strap BEFORE handling
boards or parts.
• Use proper static-proof bags.
Have only qualified persons familiar with and following
standard safety practices perform troubleshooting
procedures.
smwarn2.5 10/93
1-1. IGBT/MOSFET Tester Information
S-0880-A
1 IGBT/MOSFET Tester
Before use, install 9 volt batteries.
To check battery, connect Red and
Black leads together; test light
(LED) = On; battery okay.
2 Test Button
3 Test Light (LED)
1 23
Yellow
Black
Red
1-2. IGBT Power Module Testing Procedure
Step 1. Check IGBT module for
cracks in side of case or a separa-
tion of case from its base plate.
Replace any damaged part.
Step 2. Mark and disconnect
leads from C1, 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 or Base 1
G2 (B2) Gate 2 or Base 2
C1 Collector 1
C2/E1 Collector 2/Emitter 1
E2 Emitter 2
ST-801 132 / S-0880-A / S-0664
Static Hazard.
Put on grounded wrist strap.
Test 1
Test 2
Yellow
Red
Black
Yellow
Black
Red
C1
E1
E2
C2
G1 (B1)
G2 (B2)
OM-182 878 Page 2
1-3. MOSFET Power Transistor Testing Procedure
S-0880-A / S-0663
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
S
G
D
Yellow
Black
Red
Static Hazard.
Put on grounded wrist strap.
G Gate
D Drain
S Source
1-4. Electrical Diagrams
Circuit Diagram Wiring Diagram
SA-182 875 SA-182 876-A
1-5. Parts List
Description
Part
No.
Dia.
Mkgs.
Complete Assembly
Quantity
D1 083 850 LIGHT, ind red lens 2V LED 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PB1 175 389 SWITCH, PB MC NO SPDT 10A 115VAC 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R1 078 431 RESISTOR, C .25W 330 ohm 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R2 044 634 RESISTOR, MF .25W 332 ohm 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R3 081 833 RESISTOR, CF .25W 2.7 meg ohm 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R4 605 918 RESISTOR, C .25W 100 ohm 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1T 038 785 STRIP, terminal 3P solder 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
134 429 CASE SECTION, front/end 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
148 348 CASE SECTION, back/sides/end 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
156 170 HOLDER, battery 9V 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
604 825 CABLE, port No. 18 3/c (order by ft) 3ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
173 771 CLIP, alligator 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
173 774 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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