Lincoln Electric 11519 Service Manual page 92

F-46
SCR OUTPUT RECTIFIER REMOVAL AND REPLACEMENT (continued)
FIGURE F.13
LEFT HEAT SINK LEAD DISCONNECTION
LEFT
HEAT SINK
LEAD X1
PROCEDURE
1. Remove the case side panels using a 3/8 in.
nutdriver.
2. Disconnect lead #208S and transformer lead
X1 from the heat sink on the left side of the
machine using a 1/2 in. socket wrench. See
Figure F.13.
a. Thin lead is always on the outboard side of
the connection.
3. Disconnect lead #204 and heavy aluminum
choke lead from the middle heat sink with a 1/2
in. socket wrench and 1/2 in. open end wrench.
See Figure F.14.
TROUBLESHOOTING AND REPAIR
LEAD
#208S
Power MIG® 255XT
FIGURE F.14
MIDDLE HEAT SINK LEAD DISCONNECTION
HEAVY
MIDDLE
LEAD
HEAT SINK
4. Remove the diode lead from the negative
capacitor band buss bar on the right side of the
machine using a 1/2 in. socket and 3/8 in. open
end wrench.
F-46
LEAD
#204S