6
– 1
2
Table
6
-3: Verification of the FAN1
At the time of a low output and standby, as for
this equipment, rotation of a fan becomes slow.
Therefore, exact voltage measuring becomes
impossible. Perform the check of voltage in the
state of abnormalities.
When verifying the voltage, Verify that the AC
input voltage remain within the operating range
of the unit. (The AC input does not drop below
180VAC).
6.
5.4 Verification of the Gas Valve,
SOL1, Drive Circuitry
CAUTION
Before performing any portion of the procedure
below, make certain the unit is placed in the initial
set up condition as described at the beginning of
an above section “1.Preparation”. Refer to section
6
.4-1.
1 ) Verify the voltage between the 3PIN (Positive
[+]) and 4PIN (Negative [-]) of connector CN2
on PCB1 (WK-5713) while you press the torch
switch while in TIG Mode. (The capacity of the
voltmeter should be more than 50VDC.) The
location of connector CN2 of PCB1 (WK-5713)
is indicated in Figure 11-13. When you mea-
sure the above voltage, do not remove the
connector. Conduct the measurement while
the connector plug and receptacle are still con-
nected.
Figure
6
-13: Verification of the SOL1
2) Using the measurement taken above, follow
the chart below for possible failure modes.
Table
6
-4: Verification of the SOL1
3) When verifying the voltage, Verify that the AC
input voltage remain within the operating range
of the unit. (The AC input does not drop below
180VAC).
6.
5. 5 Verification of the primary
Diode (D1)
CAUTION
Before performing any portion of the procedure
below, make certain the unit is placed in the initial
set up condition as described at the beginning of
an above section “1.Preparation”. Refer to section
6
.4-1.
1) Verify the characteristic of the primary diode,
D1, using a diode tester.
Case 3
Inactive
Below DC 18V
Replace PCB1.
Refer to the page
7
-5.
4
Perform
“2. Verification of
the Power Supply
Voltage Test”.
Refer to the page
6
-9.
Case 4
Inactive
DC 18 ~ 25V
Replace the
FAN1.Refer to the
page
7
-18.
FAN1
Status
Voltage
measurement.
(1PIN-2PIN of
CN2 on PCB1)
Remedy
Voltage measurement.
(1PIN-2PIN of CN2 on
PCB1)
Remedy
Case1
Below DC 18V
Replace PCB1.Refer
to the page
7
-5.
Case2
DC 18 ~ 25V
Replace SOL1.Refer
to the page
7
-20.
CN2
PCB1(WK-5713)
4
3
SERVICE MANUAL
ADVANCED TROUBLESHOOTING
TRANSTIG 200 Pi