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Arcade & Retro Repairs & Mods, all new recipe, with no added MSG...
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very easy mod and it's night and day. I never played the GB original since the GBA but now it's just as good. Still the slight BG screen lag but with the bright screen it's not even a problem. Think the screen's even brighter than the GBA.
been looking to get back into chiptunes for a while so this is ideal (ie more portable than my amiga
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Picked this up yesterday, Its a slightly different revision to my two other bootlegs, it doesn't require an adapter and someone had wires soldered between the top and bottom board which were first to be removed before I even plugged it in.
When I plugged it into my harness, it was causing my PSU to shutdown immediately.
A trip to the dishwasher and a good dry had it nice and clean but still causing my PSU to shutdown.
When I inspected the solder joints on the board I noticed alot of poorly replaced components and bent legs which were shorting out off tracks. Also those 2 ram chips I replaced on my previous Bobble Bobble board were also socketed and had different rams in them than my other one
I fixed any bent legs/pins and managed to get it to boot to a pile or garbage, I then installed some new ram into those sockets and bingo, its now booting, graphics are a little blocky and colours are off but I think that's due to burnt traces on the rams that were socketed by someone else (someone with no soldering skills by the looks of it), so I'll have a go at fixing those over the weekend and recap the board too, there is also some other dodgy repairs I'd like to fix too.
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Once they not touching traces or other pins, a lot of them were touching traces on this board.
The sound shouldn't be too difficult to fix, have you tried with a crystal earpiece to listen and check if there is sound going into the amp?
To be honest when I first looked at it and the fact it was tripping my PSU I wasn't going to bother with it at all.Fair play dude! Looks a lot better than the garbled mess I got0 -
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Its like headphones for old radios, they are like €2-3 on ebay and they can pickup the slightest audio wave, I've used one in the past to listen to whats going into the amp to troubleshoot the audio on a different boardCrystal Earpiece?? Whats that..
I bought a sound chip recommended by the lads on J+ an OP-Amp i think?
Ive to replace TL084C with a new one, i have it and all just havent chanced it yet, i might do some practice soldering first on a broken board. Ive a socket for it too for when i take it off. i piggy backed it but it didnt make a difference.
Here is the thread on it..
http://www.jammaplus.co.uk/forum/forum_posts.asp?TID=65024&KW=bubble&PN=1&title=bobble-bobble-boot-questions
connect one end to ground and tip the other end off the audio input on the amp. A good Logic probe with buzzer will do a better job but RS one has no audio.
Have you replaced the capacitors, are you missing any components, what do you hear through the speakers when you turn up and down the volume pot again?0 -
CathalDublin wrote: »Its like headphones for old radios, they are like €2-3 on ebay and they can pickup the slightest audio wave, I've used one in the past to listen to whats going into the amp to troubleshoot the audio on a different board
connect one end to ground and tip the other end off the audio input on the amp. A good Logic probe with buzzer will do a better job but mine has no audio.
Have you replaced the capacitors, are you missing any?
Grand thanks ill buy one of them.. no i havent done anything on it yet other than burn the reudx roms which fixed the graphics issues on it i had originally. I piggybacked that chip but it made no difference, im afraid ill wreck the board with my soldering so im going to have a practice at a broken board i have first. Plus ive been buying all the soldering stuff i need, flux, solder, braid etc.. ive pretty much soldered 3 things total, a gamegear cap kit that didnt work, a cap on another board, and the -5 wire on this jamma adapter.. thats my soldering history to date!0 -
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Master of the UniverseJoin Date:Posts: 34613
Anyone ever have an issue like this? I've a feeling it might be a dodgy RGB scart cable. Used to work fine though.
When I switch my original Xbox on, there's just sound, no picture (sound is going through a set of PC speakers)
if I switch it so that there are multiple signals coming over the same line (so say, Dreamcast and Xbox on the same line via a multi socket thing going into one scart socket) then I'll see both console pictures garbled together.
As soon as I switch the Dreamcast off the Xbox disappears. It's like the Xbox scart cable is missing something and the other console being on boosts the signal.
Especially annoying today as I went to give the Silent Scope rifle a go!
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Master of the UniverseJoin Date:Posts: 34613
Bought another scart cable anyway (under a tenner delivered!
) so we shall see.
My scart multibox thingy has a red light on the front which lights up when a signal comes through. When the xbox is selected, the red light is about 50% of it's usual brightness, odd.
Hope this new scart cable sorts it anyway, I'm itching to use this rifle. It's ridiculously big! 0 -
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