SERVICING THE SHOT TIMER

While your shot timer 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 shot timer model number when calling.  Shot timer 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 are soldered on circuit boards mounted behind the shot timer face.  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 shot timer when removing or replacing LED digits.  Figure 9 shows the components of a LED digit assembly.

Figure 9  LED Digit Assembly

1. Remove the machine screws that fasten the face of the shot timer.
2. Squeeze the end of tie wrap to release it.
3. Disconnect the wires and cable from the jacks on the LX11 driver board.
4. Place the face assembly on a flat surface and remove the 6-32 kep lock nuts that hold the circuit board in place.
5. Remove the circuit board.
6. Align the mounting holes in the circuit board with the threaded studs on the mask and install the replacement digit on the mask.
7. Refer to figure 10 in order to plug the ribbon cable IDC connector onto the circuit board in the proper orientation.

Figure 10  LED Digit Ribbon Cable Connection Diagram

The LX11 driver board is mounted on the rear of the face panel as shown in figure 11.

Figure 11  LX11 Driver Board Location

The LPS11 Power Supply Module and the horn are mounted inside the 2180 cabinet as shown in figure 12.

Figure 12  LPS11 Power Supply Module and Horn Locations

Units built before August 27, 2007 without a CPC receptacle on top of the cabinet had a LPS-130VA Power Supply Module installed.  Units built before August 27, 2007 with a CPC receptacle on top of the cabinet had a LPS-175VA Power Supply Module installed.

LED Driver Module Replacement

Electrical connections to the LX11 DRIVER BOARD 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 on a metal bracket with two retaining nuts.

1. Do not cut the plastic tie wraps around the ribbon cables.
   1. Remove the two nuts.
   2. Remove the circuit board from the metal bracket.
   3. Insert the replacement circuit board on the metal bracket.
   4. Secure the circuit board with the two nuts.
   5. Insert the plugs into the jacks on the circuit board.

To avoid damage to the LX11 driver board, always turn off the power to the scoreboard when removing or replacing it.

Figure 13 shows the location of the LPS11A Power Supply Module fuses and jacks.  The table below figure 13 lists the fuse functions.

Figure 13  LPS11 Power Supply Module

LPS11 FUSES

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

Figure 14 shows the location of the LPS-130VA Power Supply Module fuses and jacks.  The table below figure 14 lists the fuse functions.

Figure 14  LPS-130VA Power Supply Module

LPS-130VA FUSES

Figure 15 shows the location of the LPS-175VA Power Supply Module fuses.  The table below figure 15 lists the fuse functions.

Figure 15  LPS-175VA Power Supply Module

LPS-175VA FUSES

Units built before August 27, 2007 with a CPC receptacle on top of the cabinet had a transformer mounted on a bracket inside the cabinet.  It provided 16 VAC to the LED backboard lights.  The transformer secondary circuit has a 3A fuse mounted on the transformer bracket.

LED Power Supply Module Replacement

Electrical connections to the LED POWER SUPPLY MODULE are made with keyed plugs that mate with jacks on the left side of the module.  The module is secured inside the shot timer with machine screws.

1. Disconnect the plugs from the jacks on the module.
2. Remove the machine screws.
   1. Remove the module from the shot timer.
   2. Insert the replacement module in the shot timer.
   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 shot timer when removing or replacing it.

Horn Replacement

1. Remove the machine screws and nuts that fasten the horn to the bottom of the cabinet.
2. Pull the horn assembly out of the shot timer 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 shot timer.
   1. Install the horn assembly and fasten it to the shot timer face using the machine screws and nuts.