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Author Topic: Re: Taito Games  (Read 4401 times)

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Offline Karatechamp999

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Re: Taito Games
« on: February 28, 2015, 02:25:59 PM »
I'm stumped on another project. I recently got a Bubble Bobble board and when I wired it into my cab, the game boots up into attract but won't take any credits and the screen is divided in two - the background images on the left and all sprites on the right. I have no clue what might be causing this. i'll try and attach some photos - thanks again!
http://s172.photobucket.com/user/karatechamp999/media/IMG_5629_zps2qchhhjr.jpg.html
http://s172.photobucket.com/user/karatechamp999/media/IMG_5626_zpsl4maftbu.jpg.html

I've jumpered JPA and JPB still no coin up - I think the test screen is supposed to show colour gradient in the middle of the grid but it seems to be black in the middle (although there are good colours in normal mode) and the grid is half off the screen to the left just like the title screen


« Last Edit: February 28, 2015, 05:52:00 PM by Karatechamp999 »

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Re: Re: Taito Games
« Reply #1 on: February 28, 2015, 05:29:25 PM »
all those ads and spam where you post those pic,s are  a pia

Offline Karatechamp999

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Re: Re: Taito Games
« Reply #2 on: March 02, 2015, 09:13:56 PM »
I'm stumped on another project. I recently got a Bubble Bobble board and when I wired it into my cab, the game boots up into attract but won't take any credits and the screen is divided in two - the background images on the left and all sprites on the right. I have no clue what might be causing this. i'll try and attach some photos - thanks again!
http://s172.photobucket.com/user/karatechamp999/media/IMG_5629_zps2qchhhjr.jpg.html
http://s172.photobucket.com/user/karatechamp999/media/IMG_5626_zpsl4maftbu.jpg.html

I've jumpered JPA and JPB still no coin up - I think the test screen is supposed to show colour gradient in the middle of the grid but it seems to be black in the middle (although there are good colours in normal mode) and the grid is half off the screen to the left just like the title screen




well found a busted pin - fixed.  -  and a diode soldered in backwards - fixed - still the same issue though :( anyone got a lead on this??? its seems to be a pretty specific issue

Offline Karatechamp999

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Re: Re: Taito Games
« Reply #3 on: March 05, 2015, 02:15:43 PM »
Where's channelmaniac when ya need 'em - piggybacked the 283's and 157's no change.  when I switched back one of the diodes that was soldered in backwards by a previous person it seemed to make it slightly worse?!

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Re: Re: Taito Games
« Reply #4 on: March 05, 2015, 04:27:26 PM »
all those ads and spam where you post those pic,s are  a pia

Here are the 4 photos I could see at the photobucket hosting place:
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Offline Karatechamp999

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Re: Re: Taito Games
« Reply #5 on: March 05, 2015, 05:37:42 PM »
I'm stumped on another project. I recently got a Bubble Bobble board and when I wired it into my cab, the game boots up into attract but won't take any credits and the screen is divided in two - the background images on the left and all sprites on the right. I have no clue what might be causing this. i'll try and attach some photos - thanks again!
http://s172.photobucket.com/user/karatechamp999/media/IMG_5629_zps2qchhhjr.jpg.html
http://s172.photobucket.com/user/karatechamp999/media/IMG_5626_zpsl4maftbu.jpg.html

I've jumpered JPA and JPB still no coin up - I think the test screen is supposed to show colour gradient in the middle of the grid but it seems to be black in the middle (although there are good colours in normal mode) and the grid is half off the screen to the left just like the title screen




well found a busted pin - fixed.  -  and a diode soldered in backwards - fixed - still the same issue though :( anyone got a lead on this??? its seems to be a pretty specific issue


Progress!!! ok, game coin-ups now (twas a gap in the cabs coin ground, so I just service switched it, even though the cab doesn't have a service switch) So now I can play, all the controls and player starts work - Only issue left is the screen -
Bob and Bub are confined to the very left of the screen, I can jump up the levels and even though bob stays in the far left, I can phantom move and interact with other sprites, (who also are stationary in other parts of the screen, except for up and down) , like enemies into bubbles and pick up fruit even though there is no VISIBLE movement horizontally
Both background and forground seem to be split as seen in the photos, intro screen is the same background to the left and forground to the right
Also I'm noticing (visible in the bubbles in photos) with sprites fall down the screen, there is an invisible horizontal line the scrolls with it that seems to run through the other sprites andtext giving a scroll through effect.
- looking like one of the IC's or RAM has a fault, just not sure which meet cause this, already shotgunned a couple piggybacks with no success
- pin 11 of IC 97 LS374 was broken, I soldered it back, and checked for trace cuts, and cleaned between all the pins on the video PCB
????

Offline Karatechamp999

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Re: Re: Taito Games
« Reply #6 on: March 06, 2015, 05:58:30 PM »
after test mode grid (also half off the screen) see attached photo - not sure if this means it passes ram test because that part is off the screen.
does anyone know what it looks like if it doesn't pass the ram test? would I see something on this side of the screen?
also I checked voltages on all the chips on the video pcb and all are good

Offline Karatechamp999

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Re: Re: Taito Games
« Reply #7 on: March 06, 2015, 08:44:27 PM »
hmmm not getting much help here, I've sent channelmaniac who has helped me before, haven't heard back - is there someone here who can invite me to klov so I can post there? don't have paypal for the $1 donation - really excited to get this fixed!!!

Offline Lizzo54

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Re: Taito Games
« Reply #8 on: March 16, 2015, 10:01:20 AM »
Hi,


I have a KLOV account but not exactly sure what you mean by inviting you to join.  I just logged on but honestly haven't been on there for a couple years now.  What and where should I be lookinh?  If its something I can help with  i will certainly do so.


As far as your screen issue, i u fortunately don't have any answers however, i am curious to what the problem is.  So please be sure to provide updates. 


Lenny


 

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