Thermal Arc ARCMASTER 200 TS, Руководство по обслуживанию

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200TS
11
ADVANCED TROUBLESHOOTING
11 – 7
b) Verify the connection between PCB5 (WK-
5448) and PCB4 (WK-5460).

Verify that there is no omission of a loosening
screws and connected harness between the
PCB4 and PCB5.

Replace PCB4 and PCB5 if necessary.
Refer to the page 12-11, 12.
3.5 “High Frequency Output Fail-
ure” (Unit does not generate
High Frequency.)
Cause
Occurs when the HF. unit (HF UNIT1) is defective
or blown.
Verification/Remedy
CAUTION
Read and understand this entire section before
proceeding. Extreme personal harm and test
equipment damage will occur if the procedures are
not performed accurately. The unit will generate a
High Voltage component that can cause extreme
personal harm and test equipment damage.Capac-
itors installed inside the Welding Power Source are
electrically charged for a while after the Mains ON/
OFF switch or distribution panel switch has been
turned off. Before inspecting the inside of the Weld-
ing Power Source, leave it for about 5 min. after
switching off power for discharging the capacitors,
and then remove the top and side panels.
a) Verify the connection between High Frequency
(HF UNIT1) and Coupling Coil (C.C.).

Verify the connection between the HF UNIT1
and C.C.; Verify that the quick-disconnect ter-
minals are inserted onto the terminals of HF
UNIT1 (TB5- TB6) correctly and completely.

Verify there are no short circuits, burnt or bro-
ken wires at C.C.

Replace C.C. Refer to the page 12-15.
b) Verify the connection between High Frequency
(HF UNIT1) and the current limiting resistors
(R3 and R4).

Verify the connection between HF UNIT1 and
the R3 (R4) Verify that the quick-disconnect
terminals are inserted onto the terminals of
HF UNIT1 (TB3-TB4) correctly and com-
pletely.

Verify there are no short circuits, burnt or bro-
ken wires between the HF UNIT1 and the R3
(R4).
c) Verify the connection between the terminals
between AC1-AC2 (TB1-TB2).

Verify the connection between AC1-AC2, Ver-
ify that the quick-disconnect terminals are
inserted onto the terminals of HF UNIT1 cor-
rectly and completely.

Verify there are no short circuits, burnt or bro-
ken wires between AC1 and AC2.
d) Verify and replace the Gap (GAP) of the High
Frequency Unit (HF UNIT1).

Verify that the GAP is connected to HF
UNIT1 correctly and completely.

Verify there is no dust or foreign debris
between the space of the GAP.

If there are any abnormalities observed with
the GAP, replace the GAP.

The gap is set to 1.0mm.
In the case of a gap 1.0mm or more, high
frequency voltage and a period increase.
In the case of a gap 1.0mm or less, high fre-
quency voltage and a period decrease.