HELP PSX MainBoard [Archive]

seaneyb2003

18-11-2003, 08:50

hey,

i was just looking at my psx or old playstation 7502 and i saw on top if the motherboard a metal case like thing which goes over the ic chips and so on so i cannot get to 2 of the solder points required how do i get this off do i have to desolder it? here is the mod diagram http://www.kanection.co.uk/pcb7502.htm hope this helps a bit.

Seaneyb

crazygamelover

19-11-2003, 20:46

i have one of those in my back room that is modded. not sure if its the same chip but i will pull it out and check it and get back to ya. if memory serves correctly it is modded with the same chip.
i will get back to ya and let you know. probably wont be til friday evenning though cause of work.

crazygamelover

21-11-2003, 22:13

ok seaneyb2003
i checked it out for you but it has the old 4 wire chip... sorry i couldnt help much... if i come across one i will let you know.
alot of my friends still have the old ps models so i will check with them for you.

bighap

21-11-2003, 22:42

Got him sorted through AIM.:)

http://www.modchip.ca/install/ps/7501/7501.php

ihaveanosebleed

24-11-2003, 04:03

I used to desolder this shield and throw it in the garbage. I soon realized it was too risky for splashing solder on the board as it pops out too quickly sometimes. Much easier to snip it off with small wire clippers. There's absolutly no use for this shield, a much thicker shield screws in over the whole board to hold the laser assembly in place. Don't waste your time soldering this shield, it's not worth the time and risk.

spedmetal

26-11-2003, 20:58

I disagree. I do believe this shields purpose was to deflect undesirable frequencies from other components. Also its not difficult to unsolder it and to solder it back

ihaveanosebleed

27-11-2003, 04:08

Sony couldn't have thought it was too important to only have this thin RF shield on 2 out of 6 PSX versions, all basically identical chipsets. I didn't notic any extra interference on AV or even with a cheap interact RF modulator hooked to an old TV set. All 'tronics emit some RF. Most of the 7501's I've done have been running for many years now, and I've done a lot! If you feel the need to spend your time with this shield be my guest. The MOD you are installing probably emits a 1000 times more RF than whatever tiny signal interference Sony was trying to block.

Look at the 101's, the components are jammed closer than ever and it has the weakest shielding of all.

spedmetal

27-11-2003, 09:56

Originally posted by ihaveanosebleed
and I've done a lot! If you feel the need to spend your time with this shield be my guest.

Well you and me both, but I dont see any problem with putting a console back together for a customer the way Sony intended it to be and this little shield never slowed me down. It just kinda seams like a hatchet way of modding a PSX or PS2 to leave stuff out of it.

seaneyb2003

27-11-2003, 10:43

ihaveanosebleed

27-11-2003, 13:18

Originally posted by spedmetal
Well you and me both, but I dont see any problem with putting a console back together for a customer the way Sony intended it to be and this little shield never slowed me down. It just kinda seams like a hatchet way of modding a PSX or PS2 to leave stuff out of it.

I guess you've never had to repair a mess someone's made because of this shield. I have, plus I couldn't count how many times I've upgraded chips to MM3's, I would have had to do the shield over on the same boards twice! You don't want to keep resoldering a spot on a board if you don't need to. Plus it's in the way if you need to test connections if it doesn't work, plus you could short you wire resoldeing. Not to mention the extra heat stress you're putting on the boad for no reason.I don't consider it a hatchet job, an improvement maybe.I don't appreciate what that implied to my MOD work either. I saved myself quite a bit of troubles trashing those shields. It just adds an extra margin for error, it IS a waste of time to resolder or even argue about an old board worth next to nothing. LOL, I must be board as h#ll !!!

spedmetal

27-11-2003, 21:40

Originally posted by seaneyb2003
yea ur god dam right lol which desoldering tool shall i get a desoldering braid or a deslodering pump and which one shall i get

If your careful you shouldn't need either. You might however need a higher wattage iron. I always have 2 irons going when I'm doing mod installs. Any way just heat one leg of the shield at a time and when the solder is liquid enough lift the shield gently and remove the heat until the solder hardens then move onto the next one. Leave the factory solder on the board and the shield legs and then when your all done just reattach it in the same manor you removed it. Hope this helps

edit:

one last thing you mentioned desoldering braid. You wont need it to remove the shield...but its always a good idea to have some around just incase you get some solder into an area where you didnt intend it to do and created a bridge or short. But like I said with the PSX you most likely wont run into this problem as its fairly easy.