SERVICING THE DELAY OF GAME TIMER

While your delay of game 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 model number when calling.  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.

If the model 3050 turns on LEDs, but does not operate normally, make note of which functions are affected.  If some LEDs either never turn on or always stay on, make note of their specific locations on the digits.  Refer to the COMPONENT REPLACEMENT section of this manual before changing parts.

COMPONENT REPLACEMENT

LED digits are serviced from the front of the delay of game time cabinet.

LED Digits Replacement

The LEDs that form digits are soldered on circuit boards mounted behind a metal mask.  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 delay of game timer when removing or replacing digits.  Observe proper handling procedures to prevent static damage to the circuit boards.  Figure 14 shows the components of a LED digit assembly.

Figure 14  LED Digit Assembly

1. The ribbon cables that connect to the rear of the circuit boards are not designed to support the weight of the assembly.
2. Damage to a 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 defective digit in place.
4. Remove the LED digit.
5. Remove the standoffs from the LED digit and install them in the same locations on the new LED digit.
6. Align the mounting holes in the new LED digit with the threaded studs on the mask and install it on the mask.
   1. Fasten the LED digit in place with the 6-32 kep lock nuts.
   2. Plug the ribbon cables and wire assemblies onto the proper connectors on the back of the LED digits.
   3. Re-install the mask on the face of the cabinet.

All other components are located behind the rear access panel.  Figure 15 shows the view behind the access panel.

Figure 15  Access Panel Components

LDM18 LED DRIVER MODULE FUNCTIONS

LED Driver Module Replacement

Electrical connections to the LDM18 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 model 3050 cabinet 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 cabinet.
   3. Insert the replacement module in the cabinet.
   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 model 3050 when removing or replacing it.

LPS5 LED POWER SUPPLY MODULE FUNCTIONS

 A relay inside the LPS5 Power Supply Module isolates the LDM12 LED Driver Module from the control cable when the model 3050 is shut down.  Connecting the control console to J5 with the 10 ft. extension cable bypasses this relay.  Figure 16 shows the location of the fuses in the LPS5 LED Power Supply Module.  The table following the figure lists the fuse ratings, functions, and part numbers.

Figure 16  LPS5 Fuse Locations

LPS5 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 LPS5 are made with four keyed plugs that mate with jacks on the left side of the module.  The module is secured inside the cabinet with four machine screws.

1. Disconnect the plugs from the jacks on the side of the module.
2. Remove the four screws.
   1. Remove the module from the cabinet.
   2. Insert the replacement module in the cabinet.
   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 model 3050 when removing or replacing it.