Thermal Dynamics C-70A CUTSKILL, Service Manual

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Manual 0-4699 6-9 TROUBLE SHOOTING
2. IGBT Module Test
a. With an ohmmeter set on the diode range remove P5 from the upper and lower IGBTs and make the following
IGBT checks:
+ -
E1 White + DD (1.020)
White + E1 Open After Charging
E1 Black - Open After Charging
Black - E1 DD (1.270)
E1 G1 DD (.770)
G1 E1 DD (.770)
E2 G2 DD (.770)
G2 E2 DD (.770)
E3 White + DD (1.270)
White + E3 Open After Charging
E3 Black - DD (.770)
Black - E3 DD (.770)
G3 E3 DD (.770)
E3 G3 DD (.770)
G4 E4 DD (.770)
E4 G4 DD (.770)
Gate PCB J5 IGBT Check
Diode Test
P5 Gate Connector
4 G1 Black 1 Black
3 E1 White 2 White
2 G2 Green 3 Green
1 E2 Red 4 Red
P5 Gate Connector
2 G3 Black 1 Black
1 E3 White 2 White
4 G4 Green 3 Green
3 E4 Red 4 Red
Control Connector
TW
TW
P7
P8
TW
TW
Control Connector
Pin-out diagram
b. If reading is not as shown, replace both IGBT modules and Gate PCB.
c. Reconnect P5 connector.