SERVICING THE SCOREBOARD

While your scoreboard was designed for years of trouble-free operation, some problems may occasionally occur.  Electro-Mech Scoreboard Company offers onsite service in some areas.  In other areas, we can help you contact an independent service technician.  In areas in which service is not available from Electro-Mech Scoreboard Company, we will make every effort to answer your questions.  Our trained personnel at Electro-Mech Scoreboard Company are ready to answer your questions from Monday to Friday during the hours of 8 AM to 5 PM Eastern Standard Time.  Be sure to know your scoreboard model number when calling.  Scoreboard replacement parts are always available.  Damaged parts can usually be repaired at a significant cost savings.  Our convenient toll free number is listed at the bottom of every page in this manual.

COMPONENT REPLACEMENT

LED Digits And Indicators Replacement

The LEDs that form digits and indicators are soldered on circuit boards mounted behind metal masks.  Do not attempt to replace individual LEDs.  In case of a malfunction, the entire LED circuit board must be removed.  To avoid damage to the LED driver module, always turn off the power to the scoreboard when removing or replacing LED digits and indicators.  Figure 6 shows the components of a LED digit assembly.  LED indicator assemblies are similar in construction.

Figure 6  LED Digit Assembly

1. The ribbon cable that connects to the rear of the circuit board is not designed to support the weight of the assembly.
2. Damage to the ribbon cable may create short circuit paths that will damage the LDM1 LED driver module.
3. Place the assembly on a flat surface and remove the 6-32 kep lock nuts that hold the circuit board in place.
4. Remove the circuit board.
5. Align the mounting holes in the circuit board with the threaded studs on the mask and install the replacement digit on the mask.
6. Plug the ribbon cable onto the header on the back of the circuit board.
7. Remove the machine screws that fasten the mask to the face of the scoreboard.
8. Pull the horn assembly out of the scoreboard and cut the two wires leading up to the rear of the horn assembly.
9. Splice the new horn assembly wires to the two wires inside the scoreboard.
10. Install the horn assembly and fasten it to the scoreboard face using the machine screws.

Horn Replacement

All other components are located behind the PERIOD panel of each cabinet.  Figure 7 shows the view behind the PERIOD panel.

Figure 7  SCOREBOARD ELECTRONICS

LDM1 LED DRIVER MODULE FUNCTIONS

LED Driver Module Replacement

Electrical connections to the LDM1 LED DRIVER MODULE are made with ribbon cable polarized IDC sockets and locking ramp crimp terminal housings that mate with jacks on the module.  The module is secured inside the scoreboard with four machine screws.

1. Do not cut the plastic tie wraps around the ribbon cables.
   1. Remove the four screws.
   2. Remove the module from the scoreboard.
   3. Insert the replacement module in the scoreboard.
   4. Secure the module with the four screws.
   5. Insert the plugs into the jacks on the module.

To avoid damage to the module, always turn off the power to the scoreboard when removing or replacing it.

LPS-130VA LED POWER SUPPLY MODULE FUNCTIONS

Figure 8 shows the location of the LPS-130VA Power Supply Module fuses.  The tables below figure 8 list their functions.

Figure 8  LPS-130VA Fuse Locations

LPS-130VA FUSES

Note:  Other manufacturer’s fuses may be substituted for the Bussmann fuses.

LED Power Supply Module Replacement

Electrical connections to the LED POWER SUPPLY MODULE LPS-130VA are made with three keyed plugs that mate with jacks on the left side of the module.  The module is secured inside the scoreboard with two machine screws.

1. Disconnect the plugs from the three jacks on the module.
2. Remove the two machine screws.
   1. Remove the module from the scoreboard.
   2. Insert the replacement module in the scoreboard.
   3. Secure the module with the four screws.
   4. Insert the plugs into the jacks on the side of the module.

To avoid damage to the module, always turn off the power to the scoreboard when removing or replacing it.