Chamberlain LiftMaster 41C168 Manual Download Page 1

1

Carton Inventory

Transformer (1)
Mounting Plates (2)
Screws (2)

Installation

FIGURE 1:

1.  Disconnect power and battery (if applicable).
2.  Remove the cover.
3.  Remove logic board battery plug.
4.  Unplug wire harnesses from logic board.
5.  Remove logic board.
6.  Unplug transformer wires from power wires.
7.

   If you have 

round

 transformer proceed to 

Round Transformer

If you have a 

square

 transformer, proceed to 

Square 

Transformer

.

ROUND TRANSFORMER (FIGURE 2):

1.   If your garage door opener has a 

round

 transformer, remove 

the nut and bolt from the transformer.

2.  Remove the mounting plate (4 screws).
3.   Replace the current mounting plate with the new mounting 

plate of the matching color.

4.   Attach the new transformer to mounting plate with 2 screws.
5.  Reinstall parts in reverse order.

SQUARE TRANSFORMER (FIGURE 3):

1.   If your garage door opener has a 

square

 transformer, remove 

the 2 screws holding the transformer to the mounting plate.

2.   Attach the new transformer to mounting plate with 2 screws.
3.  Reinstall parts in reverse order.

Figure 1
Figure 1
Figura 1

Figure 2
Figure 2
Figura 2

Figure 3
Figure 3
Figura 3

Transformer Kit 

Model 41C168

Cover
Couvercle
Tapa

Logic Board
Circuit logique
Tarjeta lógica

Battery Plug
Prise de la pile
Enchufe de batería

Transformer Wires

Fils du transformateur

Cables del transformador

Wire Harnesses

Faisceau de fils

Arnés de cables

Power Wires

Fils d’alimentation

Cables de alimentación

Screws
Vis
Tornillos

Mounting Plate
Plaque de montage
Placa de montaje

Transformer
Transformateur
Transformador

Screws
Vis
Tornillos 

BACK VIEW

VUE ARRIÈRE

VISTA TRASERA

Screws
Vis
Tornillos 

Transformer
Transformateur
Transformador

Mounting Plate
Plaque de montage
Placa de montaje

Bolt
Boulon
Perno 

Nut
Écrou
Tuerca

To prevent possible SERIOUS INJURY or DEATH:
•   Disconnect ALL electric and battery power BEFORE performing 

ANY service or maintenance.

Specifi cations

Volts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  120Vac - 60 Hz, ONLY

Current  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 AMP

Rated Load  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  325 in. lb/sec
 

10 Cycles per Hour

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