REMOVE AC AND DC POWER
1. Disconnect AC power to the operator.
2. Open operator cover.
3. Remove DC power by disconnecting the battery connection.
REMOVE EXISTING BOARD
1. Match replacement logic board dip switch settings to the
current logic board. Refer to page 7, if needed.
2. Reference page 2 for mechanical assembly details. Remove all
the ends of the wires connected to the existing board and
neatly lay them over the side of the electrical box. Leave
jumper wires located on the board connected until new logic
board wiring.
3. Remove the nylon nuts (7) holding the logic board to the
electrical box and hold for reassembly of new board.
4. Remove the screw holding the heat sink to the electrical box
and hold for reassembly of new board.
5. Remove logic board from the box, leaving the existing
standoffs in place.
INSTALL NEW BOARD
1. Install the new logic board in the electrical box using the old
standoffs. Be sure to install in the same configuration as it was
removed.
2. Secure logic board in place with the nylon nuts (7) removed in
step 3.
3. Secure the heat sink to the electrical box with the screw
removed in step 4.
NOTE:
For any additional help, refer to assembly drawing on
page 2.
HOW TO ORDER REPAIR PARTS
OUR LARGE SERVICE ORGANIZATION SPANS AMERICA
Installation and service information
are available 6 days a week
Call our TOLL FREE number:
1-800-528-2806
Monday through Friday 5 a.m. to 6 p.m. (MST)
Saturday 7 a.m. to 7:30 p.m. (MST)
www.liftmaster.com
MODEL K79-13493-2
Logic Board
Replacement Kit
APPLICATION REQUIREMENTS:
Model FDCL operator with charge circuit board incorporating
firmware versions 06-FDCL-500.
FUNCTION:
Replacement of the logic board in an FDCL.
I N S T A L L A T I O N I N S T R U C T I O N S
To prevent possible SERIOUS INJURY or DEATH from
electrocution or fire, BEFORE proceeding:
• Disconnect AC power at the fuse box.
• Disconnect DC power at the battery connection.
WARNING
CAUTION
WARNING
WARNING
LOGIC BOARD WIRING
1 PHASE OPERATORS
Follow wiring directions on page 3, for additional help refer to the
wiring diagram on page 4.
3 PHASE OPERATORS
Follow wiring directions on page 5, for additional help refer to the
wiring diagram on page 6.
PROGRAM SETTINGS
Follow instructions on page 7 for optional control settings.
CONTROL CONNECTIONS
Follow instructions on page 8 for optional control settings.
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