(Topic ID: 243173)

eight ball deluxe won't boot


By Matthew2015

6 months ago



Topic Stats

  • 69 posts
  • 8 Pinsiders participating
  • Latest reply 6 months ago by Matthew2015
  • Topic is favorited by 2 Pinsiders

You

Linked Games

Topic Gallery

There have been 36 images uploaded to this topic. (View topic image gallery).

IMG_2755 (resized).JPG
IMG_2754 (resized).JPG
IMG_2751 (resized).JPG
IMG_2752 (resized).JPG
Alltek_VCC_Protection.jpg
Untitled8 (resized).jpg
Alltek_U1.jpg
Untitled5 (resized).jpg
Untitled4 (resized).png
IMG_2750 (resized).JPG
IMG_2749 (resized).JPG
IMG_2747 (resized).JPG
IMG_2744 (resized).jpg
IMG_2742 (resized).jpg
IMG_2743 (resized).jpg
Untitled3 (resized).png

There are 69 posts in this topic. You are on page 2 of 2.
#51 6 months ago

turned the hv knob a bit to the right.

the displays are at 182v but they still don't come on.
but that should be enough.

they have a glow around the edges but no numbers come on.

i'm a bit baffled here.
the displays do flash on for a millisecond on boot but don't stay on.

MVI_2717.MOV_snapshot_00.08_[2019.05.25_17.25.25] (resized).jpg
#52 6 months ago

i think it must a communication issue between the mpu and the displays.
they have power but i think they will not display anything if there is no cpu information received.

they does flash for a moment when a relay or something clicks at boot then they go off.

can't think of anything else to check now.

#53 6 months ago

J3 connector looks to be in really bad shape.
i don't know how i could rebuild it.

i don't think should have 2 rows of holes on the connector , right?

i have noticed now that the score displays do flash or flicker a few times at boot.

IMG_2740 (resized).JPGIMG_2741 (resized).JPG
#54 6 months ago
Quoted from Matthew2015:

they does flash for a moment when a relay or something clicks at boot then they go off.

This is normal - happens somewhere around the fifth LED flash.

Quoted from Matthew2015:

i think it must a communication issue between the mpu and the displays.

Yes, now that you have proper voltage to the displays, the issue is logic on/between the MPU board and the displays.

Have you got a logic probe?

BTW, have you performed a memory clear on the Alltek MPU board? The manual has details of how to do it - it has been known to fix unusual problems with some games.

Quoted from Matthew2015:

J3 connector looks to be in really bad shape.
i don't know how i could rebuild it.
i don't think should have 2 rows of holes on the connector , right?

You should replace it with a crimp style connector.

25 position housing:
https://www.greatplainselectronics.com/proddetail.asp?prod=22-01-2257

Blocking key for position 2 (only one is needed)
https://www.greatplainselectronics.com/proddetail.asp?prod=15-04-9209

Crimp terminals (100 bag), but currently out of stock.
https://www.greatplainselectronics.com/proddetail.asp?prod=08-50-0114-C

For now make sure none of those wires have a chance of shorting to another and carefully put that connector back on paying close attention to how it was originally installed.

#55 6 months ago

i did a memory clear ... no change

i will need to order a logic probe.

never used logic probe before
Where do i need to attach to test the logic of the mpu and the displays.

i think J1 plug on mpu is what gets the data for the displays.

Untitled3 (resized).png
#56 6 months ago

Well , if fixing the wires and checking the logic don't fix it then maybe all of the displays are bad.

does freezing temperatures affect score displays ? I had this pinball machine in a storage building for about a year.

i will take a break for now while i wait for parts.

#57 6 months ago
Quoted from Matthew2015:

does freezing temperatures affect score displays ?

No, the fact the displays come up for a split second is good.
Conversely, some of the digits show strange non-numeric characters which isn't so good, but hard to say if it's just the split second camera shot doing it. The chip on the display board can only show numbers, not non-numeric characters.

Do this little test for me.

At the player 2 or player 4 display (whichever is easiest to access) lift the connector about 1/8" so you have access to the pins.
Connect a jumper wire to test point TP1 (5 volts) on that display, and carefully touch the other end of the wire to the display connector at pin 15. We are forcing the display to always be enabled.

Does the display come up with (junk - mostly 8's) numbers when booted?
.

If not, this time jumper TP3 (ground) on that display to pin 10 of that display connector. We are forcing the display to not be blanked.

Does the display come up with (junk - mostly 8's) numbers when booted?

#58 6 months ago

i assume that the pin go left to right , so pin 15 would be this one , right?

IMG_2742 (resized).jpgIMG_2743 (resized).jpg
#59 6 months ago
Quoted from Matthew2015:

i assume that the pin go left to right , so pin 15 would be this one , right?

Yes that's the one. You can see pin 1 is marked on the board at the very left of the pin header counting to pin 20 marked on the very right of the connector on the board.

#60 6 months ago

looks like jumping the tp3 to the did make some zeros come up.
the zeros stay on but don't change during game play.

IMG_2744 (resized).jpg
#61 6 months ago

Coming in late here, however Quench seems to have you well underway. I noticed it appears the original filter caps are still on the SD board. Have you changed them?

#62 6 months ago

still not changed the capacitors yet.

there might be a chip might be bad

i reseated u3 chip and the zero's lit up and stayed on.
only one digit on the left is shown.
showed junk on screen at boot up.
score does not change.

#63 6 months ago

The fact that only the millions digit comes on with the jumper test kind of says there may be a problem with the display interrupt generator on the MPU board.
The display interrupt generator is the 8 pin chip at U1. Zooming in on your slightly grainy photo of the MPU board looks like that chip is installed upside down...
Can you post a clear picture of the U1 chip so I can get a better view?

Quoted from Matthew2015:

looks like jumping the tp3 to the did make some zeros come up.

1) You jumpered TP3 to pin 10 right? You didn't say ^^

2) What happened when you jumpered TP1 to pin 15?

3) After the MPU LED flashes 7 times on powerup, does the LED go dim or does it completely switch off?

#64 6 months ago

yes , i jumpered tp3 to pin 10

tp1 jumped to pin 15 did nothing.

+5v led stays on
self test led is dim.

IMG_2747 (resized).JPGIMG_2749 (resized).JPGIMG_2750 (resized).JPGUntitled4 (resized).pngUntitled5 (resized).jpg
#65 6 months ago

Yes, your U1 chip is upside down.
What's even worse is it's the wrong chip!

Did you replace this chip at some point?
Did you buy the machine with the Alltek MPU board already in the game?
Or did you buy the Alltek board and it came with the wrong chip fitted?

Alltek_U1.jpg

#66 6 months ago

the Alltek board was working when i got it about 2 years ago.

i never changed that chip.

it has been sitting in the my dads building for about a year.
he may have worked on it during that time .
looks he moved u13 into u1.

i will order the correct chip right away.

Untitled8 (resized).jpg
#67 6 months ago
Quoted from Matthew2015:

looks he moved u13 into u1

I see.. yes U13 is missing.
To be honest I would install a new MC3423P at U13. It's job is to sense over voltage on the MPU board and to protect it by creating a short circuit to ground on the 5 volt VCC supply rail (via the SCR1 shown in the schematic below) resulting in the 1.10 amp F1 fuse blowing. This then cuts power to the board but leaves you with a blown soldered on fuse to replace after fixing the over voltage issues.

Alltek_VCC_Protection.jpg

#68 6 months ago

while i am waiting for the ic chips to come , i am going to work on some the cosmetic details.
after testing the game some more i noticed that the ball gets stuck on mylar thats peeling up.
even on the the right inlane it can get stuck between the mylar and worn off play field but only if its moving slow enough.

how can i re-stick the mylar and what kind of paint to use to repaint the playfiyed?

IMG_2751 (resized).JPGIMG_2752 (resized).JPGIMG_2754 (resized).JPG
#69 6 months ago

YES!
just put the u1 chip in and now the score works correctly.
the rest of the pinball is looking good too.

all thats left is repainting the in-lanes and fixing the mylar that peeling off on the left inlane.

what is the best paint to use?

how do i re-stick the mylar?

IMG_2755 (resized).JPG
Promoted items from the Pinside Marketplace
From: $ 18.00
Apparel - Men
Pinside Shop
$ 17.00
Electronics
Yorktown Parts and Equip
From: $ 155.00
Trade
Machine - For Trade
Elkhart, IN
$ 149.95
Boards
Allteksystems
$ 50.00
From: $ 155.00
There are 69 posts in this topic. You are on page 2 of 2.

Hey there! Got a moment?

Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside