IGT S+ burnt component Q-5 and Q-6 on the mpu board

[Cashen87]

Where can I found this part number on the light blub's? So this is the problem on my board since the light blub's are wrong and cause the burning/ melting issue...?

[rokgpsman]

How in the world could I know that - I'm not there to look at what bulbs are in your machine?   

It is something you have to check. You understand that we give advice and ideas, then you do the checking? The bulbs sometimes have a number printed on them. Post a photo of your pushbutton bulbs, maybe someone can id them to say if they are correct or not.

[Cashen87]

Understand that. I take pitchers tomorrow and post it the light blub's and the pushbuttons 

[Cashen87]

I have now checked the bulb's on the pushbuttons.  All Buttons have JKL #259. I also checked the bulb's on the display board. The coin accepted have JKL #86 bulb. But the insert coin and the 25 cent window have different sice on the bulb's. (see pitchur).

[Cashen87]

Display board blub's different sice

[rokgpsman]

Display board blub's different sice

I think the #86 bulbs are 6.3 volt bulbs. The #259 bulbs are also 6.3 volts but are a higher wattage bulb, which means more amps and more heat. Others here will know if the #86 and #259 bulbs are correct for your machine, so watch for replies about that. I can't see any writing on the unknown bulbs, they are darkened, not sure if that is normal, but I'd leave them out of the machine for now.

All of these bulbs are called "wedge" style bulbs due to the shape of the bulb base that plugs into the socket. You can see that the bulb wire leads come out of the bottom of the bulb and are bent up to one side of the bulb base. When the bulb is pushed into the socket the wire makes contact with the socket. Sometimes the bulb wire leads get bent or twisted and can short things out, but these look ok.

Keep in mind that the idea your burned mpu board parts could have been damaged by wrong bulbs was just one suggestion to check, a shorted or pinched wire can do it also.


It would be helpful if you would answer the questions I had in reply #12 earlier in this thread, see below:

.....What is the history on this machine, have you had it for a while and all was working ok until this happened? Or did you just get the machine and do not know if it has other problems? .....

The more information you provide the more likely you will get advice and help.

[Cashen87]

I don't have any problems on the machine or error codes when i got it...I have had this machine now in 2 months. Everything works fine when I got it. Non burn mark on the mpu board before now. The early owner told me hi got this machine from a ferry some traficking from Amsterdam to New York... that are all I know...

[rokgpsman]

I don't have any problems on the machine or error codes when i got it...I have had this machine now in 2 months. Everything works fine when I got it. Non burn mark on the mpu board before now. The early owner told me hi got this machine from a ferry some traficking from Amsterdam to New York... that are all I know...

ok, that is good to know. If it has been working for 2 months, you have been playing it for 2 months and all was ok, then to me that means the bulbs are probably the right ones because if they were wrong they would have caused this problem the first time you turned the machine on. Unless you just replaced the bulbs recently and then this happened. But you said they only thing you have done is to replace the TEST switch. Did you look at your work on the TEST switch, make sure there is no bare wire touching metal chassis or other thing that is incorrect? Can you post a photo of the TEST switch area, maybe we can see something for you to check.

You have other machines that are similar to this one? If so you can compare how the wiring goes from the machine main cabinet to the door, look at how the wires are routed, make sure none are pinched or have the insulation scraped off.




 

[Cashen87]

Thats correct. I removed the old test Button to replace a new one because the old one was defect. I solder new test Button like the old one... non wire touching the cabint or the metal. I used crimp plast over the wire on the new self test button connection... I have removed the wrong blub's from the display board...

[rokgpsman]

ok, sounds like you did a good job on the TEST switch replacement.

Those bulbs from the display board  that look darkened, you can't see any marking or number on them? It would be good to carefully inspect the display circuit board itself on both sides of the board, look for any burned places or short circuits. Give it a very good visual inspection. When you remove the display board for inspection post photos of it, front and back side views.

If you have another mpu board or can take one from a similar machine you can try it to see if this machine is ok with those bulbs removed.

WARNING- if this machine still has a problem the same thing could happen to the next mpu board you install.

[Cashen87]

Okey... I want to checked that latter when i comming home... I will check the display board and take a good look on it...
Thanks

[Amechanic]

Those bulbs look normal to me. They tend to turn black like that after many hours of use.

[rokgpsman]

thanks, any ideas on what could be causing the burned parts on mpu board other than pinched wires and shorted/wrong bulbs? From what I saw in a drawing it looked like Q5 and Q6 are connected to pushbutton bulbs.

[Amechanic]

Just my thoughts could be that age of the board and components. Light bulbs can go bad and short out as they blow up. If the machine has the correct bulbs install, then I wouldn't think they are the problem, but it doesn't mean that there is not a short some where or a bad light socket on the door. If I remember from a earlier S+ post that the wrong color small bulb sockets could cause a short to ground. They were a grey or white in color? But don't quote me on this. I just remember something about small bulb sockets on here a while back.

[rokgpsman]

I sorta remember that about the different colored sockets. Seems like it was related to when folks want to install LED bulbs. Some styles of LED's have leads that fold and run over to the other side so they are on both sides of the bulb base, other styles have the leads only on one side. Earlier in this thread I thought that might be where his problem came from, by installing the wrong style LED's to his machine.

[Amechanic]

I sorta remember that about the different colored sockets. Seems like it was related to when folks want to install LED bulbs. Some styles of LED's have leads that fold and run over to the other side so they are on both sides of the bulb base, other styles have the leads only on one side. Earlier in this thread I thought that might be where his problem came from, by installing the wrong style LED's to his machine.

I think your right about it being about sockets and LED bulbs. If no short is found, I'd lean toward electronics fatigue.

[shortrackskater]

rokgpsman and amechanic:
Here's the schematic showing the function of Q5 and Q6, relating to the "door open" and "insert coin" lamps. Both are common to RP 7 so maybe that resistor pack just went bad?

[rokgpsman]

Possibly. But he said and it looked like on his photo that Q5 and Q6 had burned, so I thought that discoloration on the resistor pack (yellow chip) was smoke residue from Q5 and Q6. But if I was replacing Q5 and Q6 I'd go ahead and replace resistor pack  RP7 too. Q5 and Q6 are connected to lamps so I was wanting to make sure the bulbs were the right ones and that the wires running to them were not pinched, didn't want him to install another mpu and have it burn up also.

Are those lamps that Q5 and Q6 control located on the display board on inside of door, or are they just mounted in the door in a individual lamp holder?

[shortrackskater]

Q5 goes to the display board. I'm not sure where Q6 goes?  The two things that change when the door is opened is the lower candle light flashes and the coins played light goes to 0.
Where's Stayouttadabunker and Roz when we need 'em?

[Cashen87]

So if i don't take wrong, so are the display board some make this issue on the mpu board?