Search found 112 matches

by caius
October 2nd, 2019, 9:51 pm
Forum: Game Hardware Q&A
Topic: Volfied PCB problem
Replies: 4
Views: 366

Re: Volfied PCB problem

The problem is obviously related to the 'TC0070RGB' modul,e most likely it got detached.But you already know this ;)
by caius
August 28th, 2018, 4:35 pm
Forum: Game Hardware Q&A
Topic: SF2 World Warrior A board - sound cutting out
Replies: 38
Views: 4319

Re: SF2 World Warrior A board - sound cutting out

If the 68000 oscillator had problems then the game would crash (while only sound cuts off on your board) so you can exclude it.You must focus on Z80 as this CPU rules the whole sound system.If you can, hook up a logic analyzer on CPU busses and see what happens when the sound cuts off.You may need t...
by caius
August 20th, 2018, 8:56 pm
Forum: Game Hardware Q&A
Topic: SF2 World Warrior A board - sound cutting out
Replies: 38
Views: 4319

Re: SF2 World Warrior A board - sound cutting out

A bad oscillator can still output some kind of signal, see this repair log of mine for example:

http://www.jammarcade.net/out-zone-repair-log-6/

I'm pretty sure this is the problem on your board.
by caius
August 20th, 2018, 3:22 pm
Forum: Game Hardware Q&A
Topic: SF2 World Warrior A board - sound cutting out
Replies: 38
Views: 4319

Re: SF2 World Warrior A board - sound cutting out

I don't believe that I did, but it is possible that I swapped one off another board at one point, shotgunning various parts. I'll have to remember this, though. Did you replace with oscillators that were an exact match for the originals? Do you have a link to the replacements you used (or were they...
by caius
August 18th, 2018, 7:23 am
Forum: Game Hardware Q&A
Topic: SF2 World Warrior A board - sound cutting out
Replies: 38
Views: 4319

Re: SF2 World Warrior A board - sound cutting out

Did you replace the 3.58MHz oscilator?I guess your is branded JVC.I remember some time ago I fixed two A-BOARDs with sound cutting out and the culprit was two bad 3.58MHz oscillator from JVC.
by caius
June 29th, 2018, 11:12 pm
Forum: Game Hardware Q&A
Topic: Bubble bobble video board compatibility
Replies: 3
Views: 472

Re: Bubble bobble video board compatibility

iIRC connector for ribbon cable has different pin counting.

P.S.
If you need the PC040DA RGB DAC, I can sell you some repro of mine.
by caius
May 27th, 2018, 5:09 pm
Forum: Game Hardware Q&A
Topic: Frequency issue - Guardiands / Denjin Makai 2
Replies: 12
Views: 1206

Re: Frequency issue - Guardiands / Denjin Makai 2

Try to use on SYNC output a 5K Ohm potentiometer set as voltage divider.
by caius
March 24th, 2018, 3:33 pm
Forum: Game Hardware Q&A
Topic: wonder boy 2 pal dump
Replies: 2
Views: 495

Re: wonder boy 2 pal dump

Is it a registered device?
by caius
March 17th, 2018, 11:42 pm
Forum: Game Hardware Q&A
Topic: CPS2 Conversion - 98% Successful
Replies: 21
Views: 2018

Re: CPS2 Conversion - 98% Successful

No, you misunderstood what I said.I have nothing against your service, it's a good thing for the whole community and a good way of sharing info/knowledge.Mine was a general reasoning, that's all.Keep up the good work your are doing.
by caius
March 17th, 2018, 10:37 pm
Forum: Arcade Games
Topic: How do you store your bare pcb?
Replies: 116
Views: 15921

Re: How do you store your bare pcb?

snk80 wrote:here one parts of my collection

Image

site that sell it seems miss from internet :cry: :cry: :cry:
Really ugly, they look like coffins :lol:
by caius
March 17th, 2018, 8:34 pm
Forum: Game Hardware Q&A
Topic: CPS2 Conversion - 98% Successful
Replies: 21
Views: 2018

Re: CPS2 Conversion - 98% Successful

Before offering not for-free service to people you should have all the needed knowledge and no need to ask help.Anyway, not referring to anyone, nowadays the internet is full of people improvising experts/repairers taking advantage of the work that other shares.
by caius
March 17th, 2018, 6:49 pm
Forum: Game Hardware Q&A
Topic: CPS2 Conversion - 98% Successful
Replies: 21
Views: 2018

Re: CPS2 Conversion - 98% Successful

You claim to offer a CPS2 desuiciding service in US and then you didn't know these simple things? :eh:
by caius
March 10th, 2018, 10:56 pm
Forum: Game Hardware Q&A
Topic: Fixeight - PCB Region change
Replies: 11
Views: 1238

Re: Fixeight - PCB Region change

You have to program the 93C45 EEPROM with correct code (doing byteswap perhaps).You can find code in each MAME ROM set.
by caius
March 9th, 2018, 8:24 am
Forum: Game Hardware Q&A
Topic: xexex audio problem
Replies: 12
Views: 1206

Re: xexex audio problem

There is only a revision of the '054544' module.You can try to replace capacitors but this could not be enough.Module is not only capacitors of top but it has a digital to analog converter and a preamplification circuit on the underneath.I know perfectly how it work since I reproduced both modules a...
by caius
March 8th, 2018, 10:34 pm
Forum: Game Hardware Q&A
Topic: Biomechanical Toy PCB pictures?
Replies: 37
Views: 5328

Re: Biomechanical Toy PCB pictures?

Yes, from Apocalypse.As I wrote on Arcade-Prjects thread ​It seems this board came originally from Italy, look at the text "CAFAGGI" on the rounded sticker.Cafaggi was a big italian distributor/importer
by caius
March 8th, 2018, 6:53 pm
Forum: Game Hardware Q&A
Topic: Ghosts n Goblins outputs no sound on Astro City
Replies: 29
Views: 2576

Re: Ghosts n Goblins outputs no sound on Astro City

Replace the PSU with a normal arcade one like I did in my Astro City or try to repair the original one.Start with replacing electrolytic capacitors, If you don't solve figure out where +12V is generated.Write down the PCU revision silkscreening on PCB of and report it here so we can look for schemat...
by caius
March 3rd, 2018, 9:07 am
Forum: Game Hardware Q&A
Topic: Ghosts n Goblins outputs no sound on Astro City
Replies: 29
Views: 2576

Re: Ghosts n Goblins outputs no sound on Astro City

First of all I'm not a friend of 'vasilas432', I only repair his boards so I've been called by him as absolutely impartial expert. Then, according to the manyal of Ghost 'n Goblins boaqrd doesn't need -5V : http://www.gamesdatabase.org/Media/SYSTEM/Arcade//Manual/formated/Ghosts-n_Goblins_-_1985_-_C...
by caius
March 2nd, 2018, 5:43 pm
Forum: Game Hardware Q&A
Topic: Ghosts n Goblins outputs no sound on Astro City
Replies: 29
Views: 2576

Re: Ghosts n Goblins outputs no sound on Astro City

Astro City PSU is notorious to have verry weak -5V and sometimes also absent at all.I can say some weeks ago a collector sent me some PCBs from Seibu (Raiden, Blood Bros and Toki, they all need -5V for proper sound operation, this voltage is need for OP-AMPs powered by dual supply) they told me all ...
by caius
February 21st, 2018, 8:50 am
Forum: Game Hardware Q&A
Topic: Xexex sound problem
Replies: 31
Views: 6611

Re: Xexex sound problem

Replied.Anyway I have successfully reproduced both modules:

http://www.jammarcade.net/konami-054986 ... roduction/

PM me if someone is interested in.
by caius
December 19th, 2017, 8:39 pm
Forum: Game Hardware Q&A
Topic: moonwalker system 18 sega problem
Replies: 13
Views: 1520

Re: moonwalker system 18 sega problem

If it still have the FD1094 and gives video it can't be suicided. The FD1094 is the game CPU. If that fails the game won't boot. You will get a solid black screen. It'd not a rule.Sometimes it can happen that, although with a charge battery, only some bits of the RAM inside the module go bad (techn...