Hey guys. Got column 8 thats pushing my bulbs too bright and tthey arnt completly turning off with all the lamps on that column.

I think I shorted the switch matrix to the bulb matrix when I was reassembling the claw handles - was using led buttons in the handle thumb triggers.

Fuse f114 blew but even after replacing it, now the controlled lamps are pulling 18v instead of 6v along that column. Also in lamp test, some of the lamps say the ball save, end up also lighting the center ramp bulb...

18v is also trigger claw magnet error..

Help?!

Also swapped roms, reset the game but still lamps and claw mag are throwing an error.

When I was reassembling the handles, I smushed the wires for led power and it shorted against the switch power. Switches seem ok, but the lamps have issues.

Affirmative.....

Not my finest moment.

I haven't checked the ic,I was hiping it was a TIP q 91 or a resistor but the tips that control that column look ok....

Going through the lamp test, I see these lamps flash at the same time if I go down column 8, the corresponding lamp on column 1 also lights.

Also,
Left flippers are stuck on when in test mode although the button is not pressed (confirmed in switch test)

Screenshot_20180603-153157 (resized).png

Just switched bulbs no flashers.

But what's happening is if I try to go thru the lamp test along col 8, the same row lamp will also light in col 1.

Was really hoping its something small but the more I look, the more it doesn't seem that way.

Any idea how this triggers the left flippers on?

K no worries, minor screw up on my part. The flippers on left side locked because the trigger switch on the handle was jammed. I readjusted it and the locked flippers are corrected.

Now back to lamp matrix issues...

Ok I ran a continuity test on j137 pins 1 to 9 and nothing... no pins are shorting on the pcb side.

Hoping it would be the playfield side, I noticed a lot of the lamps here in col 8 and col 1 are not lamps with diodes on them.... they are either lamps in a lit button or on a mounted pcb under the pf...
Hmmm

Ah maybe im not being clear

Since i was having duplicate bulbs being lit in the lamp test, one test was to check for shorting between pins on the harness that control each row..

They seem to checkout ok since there is no continuity, right?

I may have confused you, this was only the ordered lamp test.

Here is a short video showing the duplicate lamps...

I was hovering around q91 last nigbt but ill look closer at q98 later on today. Thanks for some direction!

Does q98 control cabinet swwitch lamps?

So I am going to confess that I am really new at testing transistors with a DMM. I was really hoping it was a PF diode, but after looking at all the lamps on Column 1 and Column 8, hardly any are diode controlled. I took a stab last night at the Q91, but I gotta spend a bit more time trying to test it properly. i just tried to get the DMM tips on it and visual inspection looks OK.

The fact you have seen this before, and steering me along a familiar path is giving me a ton of reassurance. My LED DMD just started throwing a line just after this started happening and I just want to button this up and never touch it again!

Ah so this was what I was doing around Q91 last night. Although i was just testing middle leg to the two outer legs, i was testing for continuity... and they checked out with no continuity.. however i did rush it, so i will check again..

For diodes, I couldn't ID any of the ones for the cabinet switches (lit buttons) and all the lit buttons are what are staying on (column

You are totally correct about electrical components and yes I have to get better at testing... of all the 4 games i have repaired, its been a moderate refresh as the boards have been known-good but it turns out my luck has run out!

pinside needs more virtual beer buttons...

oh with that, if TIP107 is bad, what is an equivalent replacement? TIP107 and NTE2344 don't appear to be popular options in..

*gasp*
CANADA............

going to test tonight with the red led on the tab.. i think i had my leads mixed up but i didn't think for continuity it would matter....? does it?

Thanks much for the encouraging words.

Would really want to know what caused the line to show up on my red dmd... still in a tizzy about it....

With the driver board still in the backbox, q91 has a value on my dmm, with red on tab and black touching the left leg. Dmm on ohm 2000

My others, q92-q98 don't appear to have any value when doing the same test.

Does this sound like q91 has something wrong?

In switch matrix news, I ran the switch edge test and everything looks to be Good.

So u20 on the mpu seems to be happy.

For the lamp matrix if I run tip42 at 6a instead of tip107 at 8a, will I be ok seeing as this machine will stay led for the rest of its life? Tip42 is a lot easier for me to find locally..

WHOOHOO!

Thanks guys! Swapped out Q91, and she's good.
No switch problems and I must have gotten better at playing since I hit Demotime just to make sure everything is playing correctly - NO SWITCH ISSUES!

NOW, i think i may have missed something else but my Elevator Flasher 1 and Claw Flasher are not going off. All other flashers on the PF are OK. I also noticed that in the FLasher test, the BG flashers that usually go off with the PF flashers are not going off.

I'll check J106 when i get home, but any suggestions? Dumbass, let me know where that VirutalBeer goes via PM!