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WIRE DRIVE ASSEMBLY AND COMPONENTS REPLACEMENT
(continued)
REPAIR PROCEDURE
1. Remove input power to the LN-742.
2. Using the 5/16 in. nutdriver, remove the
four screws from the left side cover
assembly and remove the cover.
3. Disconnect the J5 plug from the control
board and remove the wiring from the
wire clamp. See Figure F.9.
4. Disconnect the J3 plug from the control
board and remove the wiring from the
wire clamp.
5. Disconnect the J2 plug from the control
board and remove the wiring from the
wire clamp.
6. Cut any cable ties that interfere with the
removal of the wire drive assembly.
7. Remove the cable hanger securing the
toroid assembly to the side of the wire
drive compartment.
8. On two-roll feeders, use a 3/8 in. open-
end wrench and remove the mounting
screw located beneath the reed switch
energizer and mylar insulation. On four-
roll feeders, use a 3/8 in. socket, with
extension, and remove the two
mounting screws and washers located
beneath the reed switch energizer and
mylar insulation. Refer to Figure F.10.
9. On two-roll feeders, use a 3/8 in.
socket, with extension, and remove the
two mounting screws located at the two
inside corners of the drive assembly.
These screws are under the mylar
insulation. On four-roll feeders, use a
3/8 in. open-end wrench and remove
the mounting screw centered on the
inside edge of the drive assembly.
Access to this screw can be gained
from below the bottom edge of the
control board.
PLUG J2
REED
SWITCH
PLUG J3
TACHOMETER
PLUG J5
DRIVE
MOTOR
WIRE
CLAMP
FIGURE F.9 – WIRE DRIVE ASSEMBLY WIRING CONNECTIONS.
LN-742 & LN-742H
F-23
TROUBLESHOOTING AND REPAIR
F-23
