Lincoln Electric IDEALARC CV-305 - Manual (Page 58)

TROUBLESHOOTING & REPAIR F-26 F-26
IDEALARC® CV-305
ACTIVE SCR RECTIFIER ASSEMBLY TEST PROCEDURE
(CONTINUED)
TEST PROCEDURE
1. Disconnect main AC input power to the machine.
2. Locate and remove the following plug. See Figure
F.10.
3. Locate resistor R1 and remove lead #224A. See
wiring diagram.
4. Disconnect the strap from the positive heat sink to
the capacitor bank using a 1/2" wrench. See
Figure F.11.
5. Disconnect the D5 diode pigtail from the negative
capacitor buss using a 1/2" wrench.
6. Disconnect the D4 diode pigtail from the negative
strap.
CONTROL
BOARD
METER
BOARD
PLUG #
J5
J1
J3
LOCATION
Snubber board
Control board
Control Board
FIGURE F.10 -. PC BOARD LOCATION
FIGURE F.11 - RECTIFIER /CAPACITOR ASSEMBLY
D1
D4
D2
Capacitor
Bank
D5
Copper
Strap
D3
Positive
Heat Sink
Power Factor
Choke Lead
*
*
*
*
The Bus Bar where the D1, D2 and D3 pigtails are normally connected is not shown for clarity.
Positive lead
to Shunt
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