Thermal Dynamics DRAG-GUN 38, Instruction Manual

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Manual 0-2729 23 SECTION 5: SERVICE
WARNING
There are extremely dangerous voltage and power
levels present inside this unit. Do not attempt to
diagnose or repair unless you have had training in
power electronics measurement and troubleshoot-
ing techniques.
If major complex subassemblies are faulty, the assembly
must be returned to an authorized service center for repair.
Follow all instructions as listed and complete each in the
order presented.
The guide has two sections as follows:
Section 5.08 - Troubleshooting Flow Charts
Section 5.09 - Test Procedures
Specific test procedures have been grouped together, and
are referenced by the flowcharts.
B. How to Use This Guide
The following information is a guide to help the Service
Technician determine the most likely causes for various
failures. This guide is set up in the following manner:
1. Use flowchart(s) to isolate problem to possible circuit(s).
2. Perform the test procedures as required as noted on
flowcharts.
3. Repair as needed being sure to verify that unit is fully
operational after any repairs.
5.08 Troubleshooting Flow Charts
The following pages are flow charts to be used to isolate
problems in the Plasma Cutting System.
5.09 Test Procedures
The checks in these test procedures are all made with the
main power disconnected.