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NMP Drop Target Board - 3-Bank - Pre-Wired (Williams) (SEE IMPORTANT NOTES) - Non-Returnable:
Price: $25.00 each
Status: In Stock
(1 Available)
Part #: NMP3W
Condition: New
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Closeout item- available while supplies last.
We purchased a supply of these boards for game overhauls in our shop, but have elected not to use them, and are selling them off below our cost. We will have no more available after they are sold out.
Item Description:
Sensor PC board and magnet actuators for drop target assemblies in some Level 3, Level 4, and Level 6/6A Williams games (see important notes below).
This is a recent aftermarket design that has magnetic switches to detect when drop targets are knocked down. It mounts in place of original style wiper contact PC boards on the back of the drop target unit. Round magnets are installed on the backs of the individual drop targets, in place of original style wiper contacts (see additional image below for example).
This item does not work in all games that it fits, and may require modifications to work in many games. Review details below before making your decision to purchase, as this item is not guaranteed to work, and is not returnable.
IMPORTANT NOTES: (MUST READ!)
ALL SALES FINAL: This item is sold as-is with no warranty and no guarantee of proper operation.
SUPPORT: We will not provide technical support or assistance with this item after purchase, nor answer questions regarding installation or operation. Contact the manufacturer via the links below.
DO NOT PURCHASE IF: You are not sure of proper operation in your particular game or are not willing to make modifications to make this item work, as described below. This item is not returnable.
LIMITATIONS: These boards are a recent aftermarket design that had good intentions, but that have some limitations as to how and where they will work properly in some games:
- False Switch Activation by Coils: The magnet switches on these boards can be falsely activated by nearby solenoids when they are energized, such as nearby pop bumpers. This does not happen on all games, but games that do exhibit this problem will need to have some type of EM shielding placed between the board, and the offending solenoid (see links below for more details).
For example, a board that is face-to-face with an exposed pop bumper solenoid (such as Flash and Gorgar center bank targets), will have it's magnet switches falsely activated when the pop bumper coil behind it fires, thus falsely awarding drop target points, and falsely giving credit for a drop target that was not hit. In a case like this, some type of EM shield will have to be placed between the board and the coil to prevent false switch activation.
A board that is face-to-face to the BACK of a pop bumper coil bracket will usually not have this problem (the metal pop bumper bracket acts as a shield between the EM field of the coil, and the magnet sensors on the board).
- Failed Switch Detection: Software in some games does not work with these boards when targets are all in the down position. Points will be scored when the target falls, but the game will not recognize when all targets in the bank are down, so does not award points for a completed bank, and does not reset the targets until the beginning of the next ball.
This is because these boards use a magnet switch that is ON/OFF for target scoring, rather than one that is MOMENTARY like original design. When the target is down, this momentary switch circuit (scoring) is instead kept ON (fully closed) until the target is reset. Some games do not work with this.
We suspect this issue is only with earlier games (or earlier software)- games that use the White or Yellow Label ROM chips. For example, a Flash pinball in our shop that has earlier Yellow Label ROMs exhibits this problem, so these boards cannot be properly operated in a game with this setup.
It is most likely that games with later Green Label software will work okay with these boards, but we have as yet been unable to verify this in Flash (it has been verified okay in Blackout).
Purchase and use at your own risk. This item has no warranty and no guarantee of proper operation.
INSTALLATION: Manufacturer does not include installation instructions with this item, nor do we (see link below to manufacturer's site for additional info). Some familiarity with early Williams drop targets and drop target switch circuits/wiring is needed for proper assembly and connections. Wire handling and soldering skills are required.
In short, drop target assembly will need to be removed from game and partly disassembled. Make note of wire colors and connections before removing so you can use them as reference when reassembling.
Drop targets will need to be removed from the assembly and have their original-style wiper contacts removed. One of the included round magnets will need to be glued on the back of each drop target as shown in the additional image below (glue is not included with this item- we recommend something flexible like Mastic or possibly Rubber Cement). Re-install drop targets.
New board mounts in place of original-style wiper PC boards (old boards removed, this new board put in place).
Game wiring will need to be correctly connected to new board, including jumper wires from location to location (see additional image below for example). Having a game switch matrix diagram, a note of your original wire connections, and your original wiper PC boards, will be a valuable help in this step.
Drop targets will retain their original springs but you may notice drop targets fall on their own when the playfield is in the upright position. Do not be alarmed- they will work properly when the playfield is in the lowered (normal) position. It is not necessary to install stronger drop target springs (stronger springs will usually be too much for the reset coil and the game may struggle to properly reset the targets).
LINKS:
- Manufacturer's web page with additional info on this item: Click here
- Info on EM interference with magnet switches from nearby coils (in a Gorgar game), and suggestions/modification info: Click here
- Some info on wiring, installation, and assembly, with detailed info on Pokerino wiring: Click here
Additional Images:
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