Terminator 2 flipper problem

[Alstal]

Hey Everyone,

This is my fist time posting, I've been looking for solutions everywhere which brought me to your forums, I'm stumped.

I bought a T2 pin way back in 2008, after a few months of playing the right flipper started to work intermittently and eventually stop working all together. The left one followed a few weeks later. At the time I had no idea what as I've no experience with electrics so I just tried to follow wires and check the fuses. But everything seemed fine.

I had to move away for work so the game was put in storage. Finally moved home and built a house and have moved it into the future games room. Quick clean and check and it's powered on. Sound board blew a capacitor so it's disconnected till I fix it.

I've tested both flippers leaf switches, good continuity to and from the flipper control and power supply wires on the board. The solenoid flippers both work when I grounded manually, I'm sure that's a no no but I know they're working.

I have a little more understanding of electrics now but I'd still be a novice at best.

Any help would be much appreciated, it's a shame to have it stored for so long as it's been.

Thanks guys,
Alan

 

[Dinsdale]

Was it stored with the batteries in place? Perhaps check for board damage caused by leaking batteries.

You've checked the switches which is good.

Are there any errors on boot up/test mode?

Do the rest of the solenoids in the same column/row as your flippers work?

 

[Alstal]

The one thing I probably did do right was change the AA batteries every few years and checked for damage. Flippers are at the top of the board on there own unless I'm missing something (image attached) only code when I turn it on is 50013 REV L-8 attached too

 

[Alstal]

The one thing I probably did do right was change the AA batteries every few years and checked for damage. Flippers are at the top of the board on there own unless I'm missing something (image attached) only code when I turn it on is 50013 REV L-8 attached too

 

[Dinsdale]

Good about the batteries.

The code you see is simply the version of the ROM. So that's fine. If the system detects an error, it will make a sound and flash "TEST REPORT" followed by what it is telling you to is wrong.

The fact that it isn't, is both good and bad. It's good because there are no obvious errors, but bad because whatever is wrong it's not detecting.

If a switch isn't activated in a certain amount of games (I think 30?) then you'll get a test report. So the flipper switch must be activating somehow.

This could be a simple case that the connectors or pins are bad. You may need soldering, but do some basic things first.

1. With the game off, use a thin piece of metal or plastic to just push those wires in the connectors just a tiny bit. This may be all it needs, and may be the reason why the flippers slowly died. They're not making connection anymore.

Do this for all related connectors (check manual for the rows and columns on the switch matrix).

From the manual, you want to look at J207 pin 1 and pin 2. These should be marked on each side 1 and 9.

As both flippers are bad it's possibly a column issue, so do this for connectors J209 pin 1 and J209 pin 2.

2. Go into test mode, go to switch edges, and test the start button and the right pop bumper. If these work, it probably not a row or column issue.

3. Get a soldering iron and take the boards off. Check the connector pins don't have any cracked solder or anything. If you can and know how, resolder these.

But really I'm interested in step 1 and 2 for now.

 

[Alstal]

Good about the batteries.

The code you see is simply the version of the ROM. So that's fine. If the system detects an error, it will make a sound and flash "TEST REPORT" followed by what it is telling you to is wrong.

The fact that it isn't, is both good and bad. It's good because there are no obvious errors, but bad because whatever is wrong it's not detecting.

If a switch isn't activated in a certain amount of games (I think 30?) then you'll get a test report. So the flipper switch must be activating somehow.

This could be a simple case that the connectors or pins are bad. You may need soldering, but do some basic things first.

1. With the game off, use a thin piece of metal or plastic to just push those wires in the connectors just a tiny bit. This may be all it needs, and may be the reason why the flippers slowly died. They're not making connection anymore.

Do this for all related connectors (check manual for the rows and columns on the switch matrix).

From the manual, you want to look at J207 pin 1 and pin 2. These should be marked on each side 1 and 9.

As both flippers are bad it's possibly a column issue, so do this for connectors J209 pin 1 and J209 pin 2.

2. Go into test mode, go to switch edges, and test the start button and the right pop bumper. If these work, it probably not a row or column issue.

3. Get a soldering iron and take the boards off. Check the connector pins don't have any cracked solder or anything. If you can and know how, resolder these.

But really I'm interested in step 1 and 2 for now.

Sorry, I've been up at J110 and J109, pushed in J209 1+2 and J209 1+2. In test mode the start button and right pop jet are working, just did a full solenoid test and left lock and kickback aren't triggering. On switch edges test the following are closed:

Through center
Through right
Always closed
Gun loaded
Gun mark
Gun home
Drop target

 

[Dinsdale]

Ok, next check J127-9 and J130-9.

Do you have a wire with crocodile clips? You could use this to jump the pinned connections to isolate the issue whether it's playfield or board.

 

[Alstal]

J127-9 & J130-9 Checked, left lock and kickback not working. I have just noticed every time I turn it back on it says factory settings restored. Imagine the would have something to do with the batteries that it can't hold memory? There was never any corrosion on them but could there be damage on the back of the board where the holder joins?

 

[Dinsdale]

Potentially, you'll probably have to pull the board and check. Check continuity on the traces. You should pull the power board too. You may just have a cold solder somewhere.

I take it under the playfield there was no loose wires etc? That's worth a check in case it's something obvious.

 

[Alstal]

I had a set of crocodile clips for the multimeter but god knows where they are now in this place, I'll need to order some and get back to you. Had a good look under the play field when I first went at it again but everything seems solid.

 

[Dinsdale]

Ok. Might be worth taking the boards off regardless and give them a once over and reflow solder where possible and then see what's still broken.

May be worth replacing a couple of transistors too (Q44 and Q70) just incase.

Could also be the traces between the fuses and the other components.

 

[Alstal]

Thanks so much for all this, I'll get the boards off and have a good look before I order everything I need. I have a friend who's good with a soldering iron so I'll probably pass that pressure onto him while getting a few tips. I've only ever done it on machinery. And I'll replace Q44 and Q70 when I replace the capacitor on the audio board. I'll keep you posted and thank you again for your help

 

[Jay Walker]

The solenoid flippers both work when I grounded manually, I'm sure that's a no no but I know they're working

Hello, Alan,

In fact, that isn't a proscribed method of checking a solenoid, provided you ground the 'tail' end of the winding, rather than the live one. And don't leave the circuit 'made'.

One thing you should bear in mind is that T2 is one of the final Williams games before their introduction of solid-state 'Fliptronic' switching of the flipper coils, i.e. using transistors. For this game, the method used for decades remained in place; the flipper current flows through the coil, the 'End of Stroke' switch mounted alongside, the button-operated switch and then a relay contact before reaching ground. So grounding the coil by-passes all that return side wiring and contacts. The flippers are really a section by themselves, and those contacts will never show up directly in any of the switch tests, so forget about a Test Report for now. Sorry, but I have to mention that 'As both flippers are bad it's possibly a column issue' is leading you off in a wrong direction, at least in regard to the flippers not operating. The switches 'Left Flipper' and 'Right Flipper' you're hoping to see on the display will only show if the flipper coils operate, they're incidental to the main flipper circuits.

During your efforts, was the flipper relay (mounted on the large Power/Driver board) 'On'? If not, the flippers wouldn't operate, it's how the machine shuts off the flippers in Game Over and when tilted. The relay should snap On with a click when a game is started or when going into diagnostics. As with any solenoid, the relay itself can be operated by jumpering its winding to ground - one way to do so is to find its protective diode alongside* and jumper the Plain end of that. It should switch on the relay, completing the flipper return circuits. If the relay does switch on, then since you've shown the flippers themselves do work the problem seems to be in the switching/return side, such as burnt contacts, or poor connections where the wiring reaches the Power/Driver board, in that top left area. With the machine switched off, try checking continuity from the coil through to the board, then out to the button, the button switch itself, then back to the board, i.e. with a button pressed, there should be continuity from the tail-end of that sides' coil to the relay, or the vacant locations W 4 or 5 on the board, as in the footnote.

You mentioned, though, that one side became intermittent and then died, followed later by the other. That sounds like more like bad contact developing somewhere. The likeliest places are end of stroke and button switches.

The recurrence of Factory Settings Restored suggests that the AA cells have died, or the toy-like holder is broken. In that situation, the Test Report produced will be 'Time And Date Not Set'.

* from a pdf of the schematics, the diode is to to the left of the relay, it looks like 'D 39'. I'm also reminded that Williams provided a fall-back for relay failure; the outlines for 'W 4' and 'W 5' allow wire jumpers to be installed which by-pass the relay, so that the flippers should be 'enabled' at all times. Not a long-term solution, especially in a boozer or arcade, but an emergency measure.

 

[Alstal]

Thanks so much for all that, I'll work my why through what I can. The relay does not click when starting a game or when in diagnostic mode. As discussed with Dinsdale I'll remove the board anyway to have a good look at the back. As for the fallback W4 and W5, the machine is personal use only so that option would work if all else fails and I'll make a note of it in my manual. Please see two photos attached to confirm