Daktronics 4200 Series Digital Billboard - Manual (Page 18)

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5.4 Removing a Module (Rear Access)
Sometimes, when removing a module from the back of the display, certain display components
may inhibit module removal. If that occurs, remove the component according to the instructions
provided in Section 6 and then remove the module. Replace all components when done servicing
the module.
Required Tools: 1 /
8
" hex wrench, module lanyard
(from the spare parts box)
To remove a module from the back of the display:
1. Attach one end of the safety lanyard to a
lanyard ring on the top of the module.
2. Feed the lanyard over a wire rod or through
a nearby upright in the display. Do not
anchor the lanyard to another module.
3. Attach the other end of the lanyard to the
lanyard attachment ring on the bottom of
the module.
4. Disconnect the SATA power cables from the
back of the module.
5. With a 1 /
8
" hex wrench, turn the bottom latch
gear approximately a quarter-turn clockwise
to disengage the latch.
6. With a 1 /
8
" hex wrench, turn the top latch
gear approximately a quarter-turn clockwise
to disengage the latch.
Note: Always maintain a firm grip on the
module as you remove it from the face sheet.
7. Rotate the module in a way that allows
you to guide it through the frame opening
without catching the louvers or LEDs on the cabinet. Figure 9 shows proper module
removal from the back. Figure 10 shows improper module removal from the back.
5.5 Removing a Module from the Bottom Row of a Section (Rear
Access)
Required Tools: 90 degree Allen wrench, module lanyard
To remove a module along the bottom row:
1. Using the procedure outlined in Section 5.4, remove the module above the target
module.
2. Disconnect the power and SATA cables from the module.
3. Connect a module lanyard from a lanyard attachment ring on the module to a structural
member inside the display.
4. Insert the 90 degree Allen wrench into the top module latch gear.
5. Turn a quarter-turn clockwise to disengage the module from the face sheet.
6. While holding the back of the module, insert the 90° Allen wrench into the bottom
module latch gear.
7. Turn a quarter-turn clockwise to disengage the module from the face sheet.
Figure 9: Proper Module Removal from Back
Figure 10: Improper Module Removal from
Back
Module Testing and Removal