Lincoln Electric IDEALARC CV-305 - Manual (Page 50)

STATIC OUTPUT RECTIFIER BRIDGE TEST PROCEDURE
(CONTINUED)
TROUBLESHOOTING & REPAIR F-18 F-18
IDEALARC® CV-305
TEST PROCEDURE
1. Disconnect main AC input power to the machine.
2. Locate and remove the following plugs:
Note: Location of plugs will vary depending on code.
See Figure F.4.
3. Locate resistor R1 (below the fan) and remove
lead #224A. See the
Wiring Diagram.
4. Disconnect the strap from the positive heat sink to
the capacitor bank using a 1/2" wrench. See
Figure F.5.
5. Disconnect the D5 diode pigtail from the positive
capacitor buss jumper using a 1/2" wrench. See
Figure F.6.
CONTROL
BOARD
METER
BOARD
PLUG
J5
J1
J3
LOCATION
Snubber board
Control board
Control Board
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
FIGURE F.4 - PC BOARD LOCATION
FIGURE F.5 - RECTIFIER/CAPACITOR ASSSEMBLY
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