Genie 39272T.S Use and care manual

39565503416
1. Remove power from operator.
2. Press down on tabs to remove lens.
3. Remove light bulbs.
4. Note locations and remove BWC (Basic Wall Control) and STB (Safe-T-Beam®) wires. Use small screwdriver to press in on orange
tabs to remove wires. FIG. 1.
5. If equipped, unplug and remove battery backup (BBU) from back of motor housing. Fig. 2.
CLOSE DOOR PRIOR TO REPAIR.
PARTS REMOVED FOR CLARITY
09/2016
Scan code or visit
http://www.openerserviceassistant.
com/39272S.S & 39272T.S .htm
to view a video of this repair.
24V DC Opto Replacement
For Chain & Belt Operators
WARNING
BE SURE ELECTRICAL POWER HAS BEEN DISCONNECTED FROM THE OPENER PRIOR TO REMOVING THE MOTOR COVER.
!
WARNING
ANY AND ALL REPAIRS MADE TO THIS UNIT MUST BE PERFORMED WITH THE DOOR DISCONNECTED FROM THE OPENER AND IN THE
CLOSED POSITION.
!
These instructions are written assuming that you will have ample room around Opener to perform this repair. Some rare instances
will require removal of the unit from it’s mounting hardware and repair made on a bench or oor. Refer to your Owners Manual or
Installation Poster for proper assembly and carefully read and understand all warnings and cautions pertaining to your unit.
Tools required: Standard slotted and Phillips head screwdrivers, small slotted screwdriver, 5/16” nutdriver.
FIG. 1
FIG. 2
39272S.S 39272T.S

6. Using a 5/16” nut driver or common screw driver, remove the 2 opener cover screws and remove opener cover. FIG-3A
7. Note the locations and disconnect lights, transformer primary, AC power, red & black motor wires, transformer secondary,
and encoder harnesses. FIG. 4
8. Using a 1/4” nut driver or common screwdriver, remove 2 control board mounting screws and remove control board. FIG. 5.
9. Carefully remove all harnesses from harness keepers.
10. Remove Opto Assembly cover screws (3-3/16”) leave harness plugged into assembly FIG. 3B.
11. Install replacement Opto Assembly and install cover screws (3).
12. Carefully slide all harnesses back into harness keepers.
13. Reinstall the control board, harnesses, and opener cover in reverse order. Ensure that harnesses are plugged in the correct
positions. See harness detail FIG. 6.
14. Reinstall BWC & STB wires, light bulb and lens.
15. Install BBU assembly onto motor housing if equipped.
16. Reapply power to operator.
NOTE: Limit settings will require reprogramming. Refer to your owners manual for detailed instructions.
IMPORTANT: Test opener functions. The door MUST reverse on contact with a 1-1/2”high object (or a 2 x 4 board laid at) at the
center of doorway on the oor. After adjusting either the force or limit of travel, retest door opener. Failure to adjust the opener
properly may cause severe injury or death.
PARTS REMOVED FOR CLARITY
Non-BBU Models BBU Models
3-A
3-B
3-A
3-B
39272S Cover Assembly 39272T Cover Assembly
FIG. 3

Parts removed for clarity
Transformer Primary. B-B
AC Line IN. B-W
Light Socket. W-B
Transformer Secondary
R-Y-W
Encoder
Motor Wire Black
Motor Wire Red
Connector
Detail
W-G-B-B-R-RBBU B-R Wire color legend
W=White
G=Green
B=Black
BL=Blue
R=Red
Y=Yellow
FIG. 6
FIG. 4
FIG. 5