Quoted from steveoc:The two boards I replaced were the ones that have all the fuses on.
How do I conduct a test on coils? No manual.
Pg 21-28
http://mirror2.ipdb.org/files/2509/Data_East_1991_Teenage_Mutant_Ninja_Turtles_Manual.pdf
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Quoted from steveoc:The two boards I replaced were the ones that have all the fuses on.
How do I conduct a test on coils? No manual.
Pg 21-28
http://mirror2.ipdb.org/files/2509/Data_East_1991_Teenage_Mutant_Ninja_Turtles_Manual.pdf
Coil Test to Make sure the Coil is Good.
Here's another method of testing coils, which is more "low-level". This will test if the coil itself is good, and that there is power at the coil.
Game is on and in "attract" mode, and the playfield lifted.
On games WWF Royal Rumble and later, close the coin door.
Connect an alligator clip to the grounding strap by the playfield prop rod.
Momentarily touch the other end of the alligator clip to the GROUND lug of the coil in question. This will be the coil lug with the single (thinner) wire attached. The ground coil lug is also the one with the non-banded side of the diode connected. If accidentally the alligator clip is touched to the power side of the coil, the game will reset and/or blow a fuse, as the solenoid high voltage is being shorted directly to ground.
The coil should fire. If the coil does not fire, it may be a coil that is L/R relay selected. Push the green coin door button into the down position, and press the black button. This will put the game in diagnostics mode. This should de-energize the L/R relay, and turn the power to the coil in question on (if the game is Time Machine to the Simpsons, ground transistor Q29's metal tab to energize the L/R relay, because the coil/flashlamp banks are reversed).
If the coil still does not fire, either the coil itself is bad, or the coil's fuse is blown causing power to the coil to be absent.
See also:
"A Coil Doesn't Work, What To Do."
http://techniek.flipperwinkel.nl/desega/index2.htm
Quoted from steveoc:I did change the coil to the ball release when I bought the new boards... so coil is fine
Just a side note: coils rarely go bad. Unless it is visibly melted, usually there is something else wrong (I.e. a stuck switch causing a locked on transistor etc) Just don't jump on replacing coils first until you have verified WHY it isn't working. Keeping this fact in mind might save you time & money.
Quoted from steveoc:Think I am starting to get in over my head now...
Assuming the new coil which was only about £10 is working, it would appear that it is not being "called" to switch on.
The manual online is a bit blurred so I cannot even see if wired up correctly. lets assume as I took pics before it is... so following the wires from the coil gets difficult as it just joins a huge loom...
From there on in I am just shaking my head and ra the machine
These are complex machines, so you will need to decide if you have the patience to learn the processes of troubleshooting them. If you have no electronics experience or training you will be at a disadvantage.
First, identify the solenoid coil driving transistors and read at link below
http://techniek.flipperwinkel.nl/desega/index2.htm#trans
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