Thermal Arc PRO-WAVE 300 TSW, Service Manual, Page: 71 / 110

PRO-WAVE 300TSW
August 10, 2005 7-9
B. Ribbon Cable
connection between
PCB2 (WK-4983) and
PCB5 (WK-4919).
B. Check ribbon cable connections at connector CN17
on PCB2 (WK-4983) and connector CN2 on PCB5
(WK-4919) are connected firmly.
C. Connector plug
connections from PCB2
(WK-4983) to PCB5
(WK-4919).
C. Check wiring and plug connectors at connector
CN16 on PCB2 (WK-4983) and connector CN1 on
PCB5 (WK-4919) are firmly connected.
D. Power Supply Voltage
is not present on
PCB2 (WK-4983).
D. After Power Source is turned on for approx 8
seconds check Power Supply Voltages are present at
PCB2 refer to 13.3 page 42. if not present replace
PCB2 (WK-4983).
E. Defective Control PCB5
(WK-4919).
E. Replace PCB5 (WK-4919).
F. Defective Front
Controls PCB6 (WK-
4971).
F. Replace PCB6 (WK-4971).
A. Accumulation of dust. A. Refer to visual inspection section in this manual.
B. Defective Current
Transformer CT1.
B. Turn Power Source to Off. Disconnect CT1, if
Welding Mode can then be changed replace
CT1.
C. PCB plug connections
from PCB5 (WK-
4919) to PCB6 (WK-
4971).
C. Check that all four connectors between PCB5 (WK-
4919) and PCB6 (WK-4971) are firmly
connected. Check the condition of the pins on the
connectors and the connectors themselves,
if any bent pins or damaged connectors are found
replace the suspect PCB.
D. Ribbon Cable
connection between
PCB2 (WK-4983) and
PCB5 (WK-4919).
D. Check ribbon cable connections at connector CN17
on PCB2 (WK-4983) and connector CN2
on PCB5 (WK-4919) are connected firmly.
E. Connector plug
connections from PCB2
(WK-4983) to PCB5
(WK-4919).
E. Check wiring and plug connectors at connector
CN16 on PCB2 (WK-4983) and connector
CN1 on PCB5 (WK-4919) are firmly connected.
F. Power Supply Voltage
is not present on
PCB2 (WK-4983).
F. After Power Source is turned on for approx 8
seconds check Power Supply Voltages are
present at PCB2 (WK-4983). If not present replace
PCB2 (WK- 4983).
G. Defective Control PCB5
(WK-4919).
G. Replace PCB5 (WK-4919).
Possible Cause Remedy Problem
6. Machine cannot be
set using the front
panel controls or
welding mode
cannot be changed,
but the Cooling Fan
is rotating.