Thermal Arc 300GTSW Pro-Wave, Service Manual

Page: 86 / 130

pro-wave 300gtsw
6-48
June 21, 2012
6.40 HF Coupling Coil Test and
Replacement Procedures
HF Coupling Coil test procedure
1. Visually inspect coil primary and secondary for
overheating or other damage.
2. Check connections of coil wires on HF Unit
terminals CC1 and CC2.
3. Verify continuity through the coils.
Replace the HF Coupling Coil if damaged or continuity
is broken.
HF Coupling Coil replacement procedure
Refer to figure 6-45.
To remove the HF Coupling Coil:
1. Remove the Output Inductor Assembly per section
6.37 page 6-42.
2. Remove the bolt from the inside of the NEGATIVE
(-) OUTPUT TERMINAL.
3. Remove the bolt from the inside of the POSITIVE
(+) OUTPUT TERMINAL.
4. Disconnect the connector on CT1.
5. Remove the hardware securing the Output Bus
Bar to IGBT Inverter Q3. Remove the Output Bus
Bar/CT Assembly.
6. Remove the Coupling Coil from the unit,
disconnecting the BLACK lugged wires from the
HF Unit as the Coupling Coil is removed.
To replace the HF Coupling Coil, reverse the removal steps.