Dragon's Lair Fans - Arcade Lifestyle
December 03, 2021, 05:24:45 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: ALS'/DLF' : your daily dose of Arcade Life Style...inside the Dragon's Lair!
 
   Home   Help Search Calendar Gallery Login Register  
Pages: [1] 2
  Print  
Author Topic: Galaxian... operation 'back to life' ...WIP  (Read 45295 times)
DarthNuno
Administrator
ArcadeLifeStyler'
*****
Posts: 11639


Singe's castle


View Profile WWW
« on: August 06, 2006, 10:59:29 PM »


Ok, first of all have a look at the 'road trip' done for that  cab' here : http://www.dragonslairfans.com/phpBB2/viewtopic.php?t=112

Now, let's start from this point :



The monitor doesn't work anymore  confused Not a big problem, the tube had a lot of burns... for that cab, I want a perfect picture , so it's a good reason to remove it :



That monitor is easy to remove : only few screws...



By the way, I'm checking his serial number : 1691  Tongue



Very low number, I like that  Cool The SN is also inside the cab' :



Hey, a fly... escaped from the Galaxian armada  confused:  confused:  confused:    Cheesy



Here you can see all the screen burns  Evil  :



The monitor is ready to be removed... from the monitor support :



...another view before 'the operation'  roll eyes  :



By the way, it's an old Wells-Gardner K4500 19" :



I remove the chassis  :



...an important sticker...



...to keep ! roll eyes  Cool I



The tube is removed... :



...and the monitor support is ready for...



...this TV  Smiley  :



I got it for something like 60€, second hand of course  lol  Cheapest than a brand new monitor  :idea:  Cool

Let's disassemble it :



...carefull...



Et voilà : all I need is here :



I hope the tube fixations from that TV are the same than the monitor  confused



Arg... no luck  Sad It doesn' t match the existing holes...



Ok, let's make new holes :



... and this is it : the TV tube is now fixed  Tongue



... and the PCB too :



Ok, the idea is to use the real miday's Galaxian pcb on the TV, with a true RGB signal. European TV allows that type of signal, with the RGB scart connector  Cool
So I'm quicly build a test cable :



ARGGGGGGGHHH, it doesn't work... but I'm not sure If it's a problem with my TV, or the cable, or the pcb... so, I'll use my Commodore Amiga monitor to test the PCB  arrow



Ok, I'm sure that the pcb is working :



closer...



Let's check my 'homemade' PCB -> SCART...

Still not ok :



What can It be  confused:

Well, I guess it's working with the Amiga monitor because it has a separate sycn signal : 1 wire for hor.sycnh and 1 wire for vert.sycn
The TV has one wire on the scart connector for the sycn, so I presume this is the problem  confused

If it's the case, I need a LM1881n chip, in order to separate the sync.  :



I've ordered it... I'm crossing the fingers  Cool
Logged

arcadefever
Member
**
Posts: 232



View Profile WWW
« Reply #1 on: August 07, 2006, 08:13:59 PM »

nice stuff boss !!!!

busy as usual.... i hope it work ...

what the plan for the 2nd galaxian ?


just by curiosity, how much cost an old tv like that ?
Logged

DarthNuno
Administrator
ArcadeLifeStyler'
*****
Posts: 11639


Singe's castle


View Profile WWW
« Reply #2 on: August 07, 2006, 11:05:14 PM »

Quote from: "arcadefever"
nice stuff boss !!!!

busy as usual.... i hope it work ...

what the plan for the 2nd galaxian ?


just by curiosity, how much cost an old tv like that ?


Thanks ArcadeFever  Smiley

I'll probably sell the second one...

I paid approx 60€ for that TV... I can buy brand new one for approx 120€  Smiley

A good replacement for an old arcade monitor.

The picture quality on these TV tube  with an true RGB signal are the same, even better quality  Shocked  
The advantages on true arcade monitor are all the pot' to set the image geometry and the mounting fixation... but on old TV, there are sometime the pot' too  roll eyes  
Logged

DarthNuno
Administrator
ArcadeLifeStyler'
*****
Posts: 11639


Singe's castle


View Profile WWW
« Reply #3 on: August 13, 2006, 08:59:51 AM »

...OK, back to work on this one  Cool

On my last attempt to get the pcb working on the TV via an hack RGB scart cable, I had a bad synchro problem  confused

So I decide to build the famous "separate synchro circuit", feature the well know LM1881N chip  :



I insert it between the Galaxian pcb sync out wire & the TV scart sync in, I power up all the thing and...  arrow



Argh, it's worst  Sad  Sad  Sad

...check, double check, triple check... my custom made scart cable looks fine, and the separate sync circuit too...  confused

Well, at this point, I'm not really sure that I need to separate the sync...

Let's remove the circuit :



I think I'm really close to have a correct picture. The picture is not rolling, the vertical sync look good...

So, to understand where can be the problem, I'll test the TV's scart input with a Supergun and a jamma pcb.

I'll use my new Namco collection vol 2 pcb  Tongue  :





It's working fine, so now I'm sure the scart connexion on that TV is working fine and can understand the sync signal  for an arcade pcb... but what is the difference between the Galaxian pcb and that Namco jamma ocb ?

...after research on the net for info and help ( thanks MAME UNIVERS website ), the issue must be around the horizontal sync. signal  confused

...have a look closer on the TV pcb and... bingo, a really interesting pot'  :idea:  Tongue



...the sync. signal coming for the pcb need a 'micro' adjustment... a turn that pot and  arrow



Yeah Baby Yeah  Tongue  Tongue  Tongue

Perfect, but need a small focus/contrast  adjustment...easy  Cool



now it's fine  Cheesy , but the picture is too high... the upper part of the image is out of the screen ( "SCORE", "HISCORE" words are cutted)

I'm lucky, there is also a pot for that, thanks to that old tv pcb  Tongue





Stay TuNED  Cool
Logged

arcadefever
Member
**
Posts: 232



View Profile WWW
« Reply #4 on: August 17, 2006, 02:33:36 AM »

nice !!!!!

one more to go  roll eyes
Logged

DarthNuno
Administrator
ArcadeLifeStyler'
*****
Posts: 11639


Singe's castle


View Profile WWW
« Reply #5 on: August 21, 2006, 11:05:20 PM »

I can now clean up the inside the cab.

I remove everything in order to do a clean job.

Before :



After :



The scart cable has to be finished too  roll eyes

Before :



After :



The ' under bezl' cleaned :



... by Midway :



...and finally a glass bezel, not mind, but it's ok for me  Shocked



The image is really great now :



Next step : the control panel & the coins door... to continue  Cool
Logged

DarthNuno
Administrator
ArcadeLifeStyler'
*****
Posts: 11639


Singe's castle


View Profile WWW
« Reply #6 on: September 17, 2006, 10:33:15 PM »

Arghhh.... ...the original Midway is now dead  Twisted  Twisted  Twisted  I tried to repair it... but no luck... it's worst  Evil  Evil  Evil

So I got a Galaxian PCB, modified for a Jamma use, but no luck for me... The 'fire' sound is not exaclty the same than the original one, so I'll emulate the PCB  confused

ARGHHHHHH.... no luck at all... A bad move.. I broke up the TV too  Evil  Evil  Evil  Evil  Evil  Evil  Evil  220V into the scart  Exclamation  Exclamation  Exclamation  the TV pcb is DEAD  Evil  Evil  Evil

All the previous work done... for nothing  :x  :x  :x  :x  :x  Evil  Evil  Evil  Evil

Well, so let's start with an other TV... I got this one for 80€, second hand of course :



It's a 19inch Trinitron Sony  Tongue

OK, same operation than the first TV : open it and see how to fit it in the Galax" cab'  arrow



This TV has two pcb : The main one, and the Power supply pcb :



I put some fixations in order to fix the tube in the original Galax' monitor support :



Power on :



Ok, time to put all the thing in the cab... let's go back to the Nuno's Lair  Smiley



In the cab now :



The picture quality is amazing ...



Remember : True R G B signal with AdvanceMame dos via a scart on a trinitron tube : the colors are wonderfull, and the black is .. black  roll eyes





Next step : the cpo...  Smiley
Logged

DarthNuno
Administrator
ArcadeLifeStyler'
*****
Posts: 11639


Singe's castle


View Profile WWW
« Reply #7 on: September 25, 2006, 09:14:59 PM »

OK, let's 'refresh' the control panel  Cheesy

Removing everything :



Dust  Twisted

Ok, let's sand it  arrow



...from this point, I need to sand it more with a smaller sand paper, and paint it in black...
Logged

DarthNuno
Administrator
ArcadeLifeStyler'
*****
Posts: 11639


Singe's castle


View Profile WWW
« Reply #8 on: September 26, 2006, 10:26:09 PM »

before starting to work on the control panel, I'll sand + paint the marquee bracket :



Finition with sandpaper :



First layer (primer, not the final color of course ;-) ) :

Logged

DarthNuno
Administrator
ArcadeLifeStyler'
*****
Posts: 11639


Singe's castle


View Profile WWW
« Reply #9 on: September 27, 2006, 08:51:41 PM »

OK, the 'primer' is applied on both side and dry, let's go with the final color (black mate) on the marquee suport :



...sand once again the control panel, and prepare it for the 'primer' :



... 'primer' done on the first side :



Let's wait now...  roll eyes
Logged

DarthNuno
Administrator
ArcadeLifeStyler'
*****
Posts: 11639


Singe's castle


View Profile WWW
« Reply #10 on: September 28, 2006, 08:49:17 PM »

OK, the marquee suport is done... and dry :



The 'primer' layer is finished on the control panel, I'm applying now the first mate black paint on it :



Let's wait... fresh paint  Smiley
Logged

DarthNuno
Administrator
ArcadeLifeStyler'
*****
Posts: 11639


Singe's castle


View Profile WWW
« Reply #11 on: October 27, 2006, 12:18:25 AM »

OK, got a great repro from QuaterArcade.com :



I adjust &  fix the right part of the CPO with two buttons... In that way, it won't move when I'll apply it Cool  



...Let's go...



Done :



Let's check the old stuff on the panel :



Ouch ... old dirty buttons.. and the rest  confused  full of rust  confused



Ok, let's fix that  Shocked





The result :





Ouch, the contact of the original two ways stick are not working good  confused



Let's fix that :



...and it's working PERFECTY now  Tongue





Stay TuneD  
Logged

DarthNuno
Administrator
ArcadeLifeStyler'
*****
Posts: 11639


Singe's castle


View Profile WWW
« Reply #12 on: November 05, 2006, 08:35:43 AM »

OK, now the final step : the coin door  arrow

Here's the original coin door :





 oppps very bad  oppps

I'll paint all that stuff... and I'm luck, I've found the perfect color  Tongue  :



Sanding the stuff...



...and painting, with ALWAYS a primer layer first...





... even this small item from the door  





...cleaning & rebuilding ...



...and here's the result  Cool



I just need to found a midway coin door logo sticker... but for now...

PLAYING TIME  lol  lol  lol



 Tongue  Tongue  Tongue
Logged

arcadefever
Member
**
Posts: 232



View Profile WWW
« Reply #13 on: November 06, 2006, 06:08:52 AM »

NICE....

that cab look like new Smiley

so, you use a pc inside ?
Logged

DarthNuno
Administrator
ArcadeLifeStyler'
*****
Posts: 11639


Singe's castle


View Profile WWW
« Reply #14 on: November 06, 2006, 07:47:46 AM »

Quote from: "arcadefever"
NICE....

that cab look like new Smiley

so, you use a pc inside ?


Yeps, an old Pentium II 400Mhz with DOS Advance Mame ... it works like a charm  Cool
Logged

Pages: [1] 2
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!