Thermal Dynamics CUTMASTER Service Manual

CUTMASTER 40MM
SERVICE 5-22 Manual 0-5085
E. PCB 1 IGBT Test
1. Disconnect transformer wire from PCB 2 Terminal
PRI1 (A).
2. Using an ohmmeter check continuity between the
following points:
PCB 1 Q1
Test points located on PCB 2
Meter (+) Meter (-) Indication
PRI 1 MTH 2 Forward Bias
PRI 1 MTH 4 Capacitor Charging
MTH 2 PRI 1 Capacitor Charging
MTH 4 PRI 1 Forward Bias
PRI 2 MTH 2 Forward Bias
PRI 2 MTH 4 Capacitor Charging
MTH 2 PRI 2 Capacitor Charging
MTH 4 PRI 2 Forward Bias
3. Using an ohmmeter check continuity between the
following points:
PCB 1 Q2
Test points located on PCB 1* & PCB 2
Meter (+) Meter (-) Indication
PRI 3* MTH 8 Forward Bias
PRI 3* MTH 7 Capacitor Charging
MTH 8 PRI 3* Capacitor Charging
MTH 7 PRI 3* Forward Bias
PRI 4* MTH 8 Forward Bias
PRI 4* MTH 7 Capacitor Charging
MTH 8 PRI 4* Capacitor Charging
MTH 7 PRI 4* Forward Bias
F. PCB 5 IGBT Test
1. Disconnect transformer wires from 40 Amp PCB
5 terminal PRI 1 (A).
2. Using an ohmmeter perform the following
checks:
PCB 5 - Q1
Test points located on PCB 2 AND PCB 5*
Meter (+) Meter (-) Indication
PRI 1* PMTH 1 Forward Bias
PRI 1* PMTH 2 Capacitor Charging
PMTH 1 PRI 1* Capacitor Charging
PMTH 2 PRI 1* Forward Bias
PRI 2* PMTH 1 Forward Bias
PRI 2* PMTH 2 Capacitor Charging
PMTH 1 PRI 2* Capacitor Charging
PMTH 2 PRI 2* Forward Bias
3. Disconnect transformer wire from 40 Amp PCB
5 terminal PRI4 (C).
4. Using an ohmmeter perform the following checks:
PCB 5 – Q2
Test points located on PCB 2 AND PCB 5*
Meter (+) Meter (-) Indication
PRI 4* PMTH 3 Forward Bias
PRI 4* PMTH 4 Capacitor Charging
PMTH 3 PRI 4* Capacitor Charging
PMTH 4 PRI 4* Forward Bias
PRI 3* PMTH 3 Forward Bias
PRI 3* PMTH 4 Capacitor Charging
PMTH 3 PRI 3* Capacitor Charging
PMTH 4 PRI 3* Forward Bias
G. PCB 1 Output Diode D3 Test
1. Disconnect transformer wires from Main PCB 1
terminal SEC1.
2. Using an ohmmeter perform the following
checks:
PCB 1 D3
(Test points located on PCB 1* & PCB 2)
Meter (+) Meter (-) Indication
CHOKE1 SEC1 Forward Bias
CHOKE1 SEC2 Forward Bias
SEC1 CHOKE1 Reversed Bias
SEC2 CHOKE` Reversed Bias
WORK1 SEC1 Reversed Bias
WORK1 SEC2 Reversed Bias
SEC1 WORK1 Forward Bias
SEC2 WORK1 Forward Bias

Thermal Dynamics CUTMASTER Specifications

General

Brand	Thermal Dynamics
Model	CUTMASTER
Category	Welding System
Language	English