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F-49

TROUBLESHOOTING AND REPAIR

F-49

 

CONTROL BOARD REMOVAL AND REPLACEMENT (continued)

 

FIGURE F.19 - CONTROL BOARD ALL PLUG LOCATIONS

J5 J6 J7 J8

J9

J4

J2

 

 

ST

 

 

 

 

AT

 

 

 

 

US

 

 

 

 

T

 

 

 

 

HE

 

J10B

 

 

RM

 

 

 

AL

 

ELELN

 

 

 

LI

 

 

 

 

NC

 

 

 

 

O

 

 

 

 

CT

 

 

 

 

RI

 

 

 

 

C

 

 

 

 

WARNING

 

 

 

J10A

 

REMOTE

 

 

 

 

 

PO

WER

 

 

 

 

 

 

ON

 

 

 

 

OFF

 

 

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CAUTION

Observe static precautions detailed in PC Board Troubleshooting Procedures at the beginning of this section.

6.Using a phillips head screwdriver remove the two screws and their washers from above and below the input power switch. See Figure F.18.

7.Using a phillips head screwdriver remove the four screws from around the two welder output termi- nals on the front of the machine. See Figure F.18.

8.The front of the machine may now gently be pulled forward to gain access to the Control Board. Note: The front of the machine cannot be removed completely, only pulled forward a few inches.

9.Beginning at the right side of the control board remove plugs J10A and J10B. Note: Be sure to label each plugs position upon removal. See Figure F.19.

10.Working your way across the top of the board from right to left, label and remove plugs #J9, #J8, #J7, #J6, and #J5. See Figure F.19.

11.Working your way down the left side of the board, label and remove plugs #J4 and #J2. See Figure F.19.

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POWER WAVE 355M/405M

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Lincoln Electric 355M, 405M service manual J10B