Lincoln Electric SVM107-B service manual Printed Circuit Board Removal and Replacement, Procedure

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F-52 F-52

TROUBLESHOOTING & REPAIR

PRINTED CIRCUIT BOARD REMOVAL AND REPLACEMENT

(continued)

FIGURE F.12 - PRINTED CIRCUIT BOARD LOCATION

Current	Current
Sensor	Sensing Leads
In Line
Connectors	12 Pin
	Molex Plug
5/16"
Screw (4)
PROCEDURE

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Before starting the following procedure, refer to the topic “PC Board Troubleshooting Procedures” at the beginning of this section.

1.Remove the engine spark plug wires.

2.With the 5/16” nut driver, remove the 6 sheet metal screws from the case top.

3.Remove the rubber gasket (cover seal) from the lift bail.

4.Remove the fuel cap. The rubber gasket for the fill tube will come off with the case top.

5.Remove the case top, then reinstall the fuel cap.

6.With the 5/16” nut driver, remove the 5 screws holding the right case side.

7.Remove the right case side by lifting up and out.

8.WIth the 5/16” nut driver, remove the printed circuit board cover. See Figure F.12.

9.Remove the 12-pin molex plug from the Printed circuit board.

10.Detach the two in-line connectors from the current sensing leads (254 and 254A - see the Wiring Diagram.). These leads attach to the current sensor located on the print- ed circuit board.

11.Remove lead #3 from the 115 VAC recep- tacle. Thread the lead through the hole in the current sensor in order to separate it from the printed circuit board. It will prob- ably be necessary to cut any cable ties restraining the wiring. Use the diagonal cutters.

RANGER 8