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 11 shows the components of a LED digit assembly.  LED indicator assemblies are similar in construction.

Figure 11  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 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. Refer to figure 12 in order to plug the ribbon cable IDC connector onto the circuit board in the proper orientation.

Figure 12  LED Digit Ribbon Cable Connection Diagram Horn Replacement

1. Remove the machine screws that fasten the mask to the face of the scoreboard.
2. Pull the horn assembly out of the scoreboard and cut the two wires leading up to the rear of the horn assembly.
3. Splice the new horn assembly wires to the two wires inside the scoreboard.
4. Install the horn assembly and fasten it to the scoreboard face using the machine screws.

The components that control the middle section of the scoreboard are located behind the PERIOD panel.  Figure 13 shows the view behind the PERIOD panel.

 
Figure 13  Middle Section Electronics

LDM1 LED DRIVER MODULE FUNCTIONS

LED Driver Module Replacement

Electrical connections to the 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.

The power components inside the HOME STAT PANEL section of the scoreboard are located behind the PLAYER FOULS POINTS panel on the right side of the scoreboard.  The following steps describe how to remove the PLAYER FOULS POINTS panel:

1. The cables that connect to the rear of the assembly are not designed to support the weight of the assembly.
2. Figure 14 shows the components behind the panel.

Figure 14  HOME Stat Panel Section Electronics

The power components inside the GUEST STAT PANEL section of the scoreboard are located behind the PLAYER FOULS POINTS panel on the left side of the scoreboard.  The components and their functions are identical to the HOME STAT PANEL components.

Each row of digits in the player stat panels is controlled by its own LX driver board.  They are located on the rear side of the face panels between the player fouls and player points digits.

LX Driver Board Replacement

Electrical connections to the LX LED DRIVER BOARDS are made with ribbon cable polarized IDC sockets and locking ramp crimp terminal housings that mate with jacks on the circuit board.  The circuit board is secured inside the scoreboard on a metal bracket with two hex nuts.

1. Unplug the electrical connections from the circuit board.
   1. Remove the two hex nuts.
   2. Remove the circuit board from the scoreboard.
   3. Insert the replacement circuit board on the metal bracket in the scoreboard.
   4. Secure the circuit board with the two hex nuts.
   5. Insert the plugs into the jacks on the circuit board.

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