Williams (Euro) Joust: a close encounter with the Flying Elite

[italiandoh]

will those european ballasts work with the stepdown converter i have to use (remember, moon patrol is an american cab)?

Again no, unless you find a ballast in europe that runs on 120 V AC.

Matteo

[Laschek]

You can buy 120 Volt ballasts at Jukebox shops, like "Stamann Musikboxen" in .de:

https://ssl.kundenserver.de/s34665813.einsundeinsshop.de/sess/utn;jsessionid=154c55b1415e07d/shopdata/0060_Beleuchtung=2C+Schl=FCssel=2C+R=E4der+und+mehr+=28lamps=2C+keys=2C+casters+and+more=29/0030_Starter+und+Vorschaltger=E4te+=28starter+and+ballasts=29/product_overview.shopscript

[Superully]

cool, thx sascha! is the hz frequency important, there are some with 50 (although not available atm) and some with 60 hz 

[Laschek]

good question, next question

[italiandoh]

cool, thx sascha! is the hz frequency important, there are some with 50 (although not available atm) and some with 60 hz 

60 Hz means that they can work up to 60 Hz. Here in Europe we have 50 Hz lines, so 50 Hz ballast will be fine too. Just make sure you don't mount 50 Hz ballasts and then use the game in USA

Matteo

[baritonomarchetto]

Enjoying my holidays. this mean more time for my Joust  

I have finally completed the jamma-to-williams harness... so it will be time for smoke test soon!

i used this male-to-male jamma connector



and some wires i pre-cut before soldering (upstairs at home, more confortable than the garage )



This is the final harness: looks nice huh?  



Installed inside the joust... a lot of cables here...



Ok... now take a deep breath and keep your fingers crossed...














The splash screen!



... i am so exited! Is it possible that at the first attempt everithing works?!  












No, it's not  



We have an error here... ROM ERROR 6

also the PCB reminds me that there is something wrong  







2-0-9 ? Could it be? No, it couldn't it could, but it's not... the fact is that the PCB is mountend upsidedown  

2-0-6 is the error

After the ROM error, i had this image:



Ok, the first thing to do is then reseat the incriminated ROM





Damn little thing!

Something changes! But it is worst: the screen reset continuously on the splash screen... but the PCB reports the error like before...

I am in a stuck now: i have not a programmer and i need someone to burn that ROM for me...

A question at this point: could it be that after putting a new ROM #6 other ROM/RAM errors will be detected, or the initial test reports on screen all the errors at once?

thanks  

[Superully]

first of all: good job so far, you're almost there!

are those GLOVES?

I am in a stuck now: i have not a programmer and i need someone to burn that ROM for me...

laschek (=sascha) has one, i'm sure he could burn those for you if you pay him in beer (sorry sascha, couldn't resist ). whether he's checking all the roms, i don't know, but i guess he does that one after the other and if he's stuck on one he doesn't continue, but as i've said: just a guess!

[Laschek]

laschek (=sascha) has one, i'm sure he could burn those for you if you pay him in beer (sorry sascha, couldn't resist ). whether he's checking all the roms, i don't know, but i guess he does that one after the other and if he's stuck on one he doesn't continue, but as i've said: just a guess!

Yes, I might be able to burn that Rom, or even check all the Roms (if they're not 2708's), though I don't accept beer as payment anymore

Did you reseat every socketed IC and check the voltages? If it constantly resets I would increase +5V a bit if possible. Might be as easy as that.

[baritonomarchetto]

@Ully: yes, those are gloves; i use them almost every time i work on my machines for security: they give me some cut protection and a (very little) shock protection.

@Sascha: i only reseat that ROM #6 because of the test indicate that one was bad: i will reseat the other one, also. For the voltage, at first (before reseating the ROM) the PCB didn't reseats... i will try an increase, anyhow, than i will contact you in PM for the "ROM furniture details" 

[baritonomarchetto]

I assumed that the "ROM ERROR 6" must be attributed to the video rom 6 (it was in front of me and had "6" on it, so...  ), but the ROM board has 12 ROMs, enumerated from 1 to 12... so i will reset them all and see what happens 

[baritonomarchetto]

Unluckily even reseating all the 12 ROMs of the ROM board (after a good wet cleaning) didn't change the functionality: i still have the "ROM ERROR 6" on the screen... i am seriously evaluating the possibility of buying a cheap eprom programmer...

[level42]

Is the +5V voltage on the ROMs OK ?

Sometimes people measure the +5V on the power supply, but you have to measure it on the board.

[baritonomarchetto]

I measured 5V on the pins of the ROM board and are perfect    

[baritonomarchetto]

An EPROM burner (and an UV lamp) is on it's way to my house (i will receive it tomorrow or the day after)... any advice on the file i can use to burn the old EPROM? Are MAME files "ready to burn" or do they need special threatments? I am so close to my goal now 

[baritonomarchetto]

Some new dudes: this morning the programmer was delivered to me! I had just check all the ROMs of the OM board and... they are all verified! 

I really don't see the prob at this point... what could it be? I WANNA PLAY MY JOUST!