DESCRIPTION

• compact board
• plugs directly into the driver board A3J2 A3J3 A3J4 connectors
• additional board to test the driver board A3J5 A3J6 connectors
• power supply comes from the driver board
• use of classic components
• a LED for each output (lamp, relay or coil)
• each lamp output is labeled and grouped 4 by 4 (1 group for each driver board 74175 chip)
• a load to get at least 300mA per coil output protection against overloads (if one or more transistors of the driver board are permanently failing)
• additional external 5V input connector if more power is needed

Each L4..L51 output drives a 5mm LED.

The SHOOT AGAIN lamps and GAME OVER and TILT relays outputs drive a 10mm LED.

The coil outputs (SOL1, SOL2, SOL5, SOL6, SOL9) on A3J4 drive a 10mm LED + a power load 12 ohms/5W resistor (that can be bypassed with a jumper).

The little additional board displays the signals coming from A3J5 and A3J6 :

• SOL3 SOL4 SOL7 SOL8 coils
• coin lockout coil
• S1 S2 S4 S8 sounds

The 5V general power supply is taken from A3J3 (and A3J5), with an overload protection (resettable polyswitch fuse).
This protection is mandatory if the 5 coil outputs are used simultaneously (current > 500mA).
A screw connector can be used to power the board with a more powerful power supply if needed. Power input is selected via a 3-position jumper.

Please note that the polyswitch overcurrent protection only protects the 5V power supply coming thru A3J3 (A3J5).

CONNECTING AND TESTING

The 3-position jumper selects the 5V source

• position 1-2 (high) : 5V from A3J3
• position 2-3 (low) : 5V from the screw connector ( + = highest position pin, ground = lowest)

To test a driver board in an unknown condition, it is advised to remove the 5 coil jumpers. This way, the load resistors are disconnected.

The connectors are aligned with the driver ones. So, switch off the pinball and insert the test board connectors into the driver board connectors. Then power on.
At power up (immediately for system80A games or after 5 seconds for system80 games), the 2 TILT and GAME OVER LEDs briefly blink together, then the lamp LEDs will be driven by the CPU, or cycle if the attract mode has been activated.
No coil LED should be lit except if there is a default on the driver board.

Fixing boards in an unknown condition becomes (almost) a real pleasure.

Two example videos from a Panthera:

• during power up with the attract mode on. The GAME OVER lamp (L11) blinks and the HIGH GAME TO DATE lamp (L10) lits every 5 seconds
• at the beginning of a new game. The drop-target bank coils activate (blue LEDs on the left) then the 1 2 3 rollovers blink together

Please note that the L48..L51 lamps lit oppositely to the L44..L47 lamps.
This is normal by design of the driver board.

Example of use:







 If you only need the bare PCB board, please choose the board.








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159 €  Check the availability   166 USD   Estimated value. Your bank or Paypal may apply a different exchange rate. All payments to be made in euros (€) 238 CAD   Estimated value. Your bank or Paypal may apply a different exchange rate. All payments to be made in euros (€) 266 AUD   Estimated value. Your bank or Paypal may apply a different exchange rate. All payments to be made in euros (€) 132 GBP   Estimated value. Your bank or Paypal may apply a different exchange rate. All payments to be made in euros (€) 148 CHF   Estimated value. Your bank or Paypal may apply a different exchange rate. All payments to be made in euros (€)