Activate banks C and D without installing the PBS-TRI board.

[jarris]

Good day everyone!
First of all, I want to thank everyone on this forum, who was my inspiration and basic idea. I would like to contribute now and close one chapter. As I draw from more threads, I have created this in order not to offend anyone. with so much introduction.
And now with instructions.
To activate Bank C and D in your TRINITY, you need:
1./ two NEC D431000ACZ-70L ICs,
2./ genuine PBC-TRI sound FDD disc (not necessary),
3./ cross screwdriver,
4./ little bit of time.
!!!First complete a backup your Trinity!!!
Remove the rear wall.
After removing the rear wall, you will see a centerboard with two slots in the middle. ( IC31 and IC32 PBS-TRI SRAM )
Here you put two ICs. Check the correct orientation!!!
At the some board is the PBS-TRI 68pin connector, it is necessary to connect the pins 67 and 68. ( I have chosen the route of the flyover to back side. )
Now screw all back together.
Press "enter" and "0" and turn on the power. SRAM initialization appears on the display. Release the buttons.
Now load the original sounds from the FDD. Positions C0-C7 do not play. Missing samples here - missing sample board. Other positions are fully functional.
And it is all! :oD
I am sorry for my bad English. I hope the result will be a pleasure for you, as for me !!
Let our honest TRINITY live.
P.S. If need be, I can send you my pictures and sound bank.
jarris666@gmail.com

[tiretrak]

Good day everyone!
P.S. If need be, I can send you my pictures and sound bank.
jarris666@gmail.com

hi
can you upload pictures here?

[jarris]

Good day everyone!
P.S. If need be, I can send you my pictures and sound bank.
jarris666@gmail.com

hi
can you upload pictures here?

image you can download here:
http://leteckaposta.cz/743166738

[tiretrak]

image you can download here:
http://leteckaposta.cz/743166738

no fotos((

[k-Tracker]

Would you please post a PBS slot layout and location of pins 67 and 68 there?

[MattM]

Hi,

As the heading says, has anyone else tried this memory upgrade?

If so could you report on the results please.

The parts seem readily available on fleabay and it seems straight forward. (Famous last words)

[MattM]

Hi All,

I have just replaced the soldered in back up battery with a button cell holder. Easy job, there are even holes ready to go, just the right distance apart.

Opening the thing up made me consider the idea of extra memory without the PBS-Tri board again. Mucking around looking at different banks of programs I had to choose between because of space limitations is the motivation.

The SRAM is readily available very cheaply.
Openning the Trinity to access the SRAM slots is straight forward.
Accessing the slot where the 2 pins need to be shorted is the same.

Is there a blank plug that could be have pins 67 and 68 shorted then just be plugged into the PBS-Tri socket available?

Seems this could be developed into a cheap kit of 2 sticks of SRAM and a plug with pin 67 and 68 shorted?

I have had no response from jarris so far. So, again, has anyone tried this? I have read reports of C and D banks continuing to function after the PBS-Tri was either removed or became disconnected, so it seems likely it could.

Does anyone have enough knowledge of the PBS -Tri socket to know if shorting pin 67 and 68 could cause damage?

Any thoughts on this welcome. I have some SRAM on the way.

Cheers,
Matthew

[Drummond]

Any updates on this? Has anybody else done it?

[MattM]

Any updates on this? Has anybody else done it?

I have purchased the correct ram; however i have not proceed. A mix of lazy and concern shorting those 2 pin could cause damage has stopped me.

From:

http://www.korgforums.com/forum/phpBB2/ ... 1fc119a58b

It seems clear just insertining the ram will not work.

From the other conversation linked in it

http://www.korgforums.com/forum/phpBB2/ ... sc&start=0

It seems the ram will keep functioning if a pbs tri board previously installed is removed. Confirmed this from one other source, i can no longer find. Makes me wonder if the pbs tri board does just short those 2 pins. Inspecting one might confirm this. Maybe there is some one with one they have not installed?

The OP jarris, has not responded to email and the pics he mentions are not accessible, so while i have the technical skill to complete the work, I do not have the knowledge needed to be confident this would not cause damage.

Confirmation from someone with appropriate technical knowledge would be very welcome.

[heshamex4]

for every one wondering about adding bank C and D without PBS-tri
I just did it and works fine
I will add a YouTube link and you will see it
just editing my video once it's ready i will let you know

the video will be in Arabic but I will add English sub at some point

[heshamex4]

there you go

https://www.youtube.com/watch?v=qRSG_B- ... framerizla

[Vesa]

there you go

https://www.youtube.com/watch?v=qRSG_B- ... framerizla

Very nice!

Now I need to to find a technician who does it for my Trinity Plus

[heshamex4]

GOOD LUCK VESA

[Drummond]

I have done the mod and it works. Now I have 512 programs, 512 combis (banks A, B, C, D) and 128 slots in solo-tri. I purchased the memory chips from aliexpress and used a leg I cut from a resistor to connect the necessary pins in trinity's main board (mine is a trinity pro). After that I restarted pressing enter + 0 to reset the board and that was it. Working fine.

I followed the instructions in this video: https://www.youtube.com/watch?v=qRSG_B-Dbqc&t=440s

[Vesa]

Ordered 4 brand new memory chips from ebay, $1.63 each, also a beginners soldering iron set. Hooray if I succeed getting 256 + 64 + 256 extra Programs and Combinations

Meanwhile I might program a Trinity PCG/Combination utility; Move Programs where ever you like and Combis will still use their intended timbres. It's a must for me now since I have purchased two PCG sets that have a zillion Initial Programs and Combinations, only the sound designer's Programs/Combis are in those sets.