Namco Classics Collection Chip Swap

MrMolding

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Does anyone know if I can put the ROMs from a Namco Classic Collection Vol 1 PCB into a Vol 2 PCB? I looked and it says that they are both based on the Namco ND-1 board.
I recently got a Vol 1 PCB with color issues and I wanted to try the ROMS in my Vol 2 board to see if it is in fact the board. I've exhausted it being a monitor adjustment problem as I've plugged the board into three machines and the problems are present in all of the machines.

Any help is welcomed!
 
Answered my own question...

For anyone who gets to this point and decides to give this a try. The model number of the Vol. 1 board is ND-1 and the model number of the Vol. 2 board is ND-1 (B). Needless to say, I swapped chips anyway and the Vol. 2 board with the Vol. 1 ROMs kept flashing green when I turned on the machine. I didn't try the Vol. 2 ROM in the Vol. 1 board.
So...it doesn't work. Swapped back and status quo (But Vol. 1 board still has color problems).
 
If you still have the color issue and it look like in the picture below.
Then the solution is to exchange the caps C13, C14 and C15 (next to the LM1203) with new ones.
Have done it by myself yesterday and the picture is 100% good again.

ECSJc.jpg
 
Yup... somewhere around here I have a post about that... and it's documented in my repair logs.

The surface mount caps on that generation of Namco boards leak and need replacing.

RJ
 
Ok. Found them, but my eyesight is going! They look like they are plug/push in vs. solder -- does that make sense? Do you remember the specs for them and were you got the replacements (mouser, etc), I'm having a hard time reading them.
 
They are surface mount caps... they solder flat on the top of the board surface.

Use a hot iron and carefully lift them off the board then clean the pads of any o0f the liquid cap residue.

You can replace them with regular caps by doing this: Leave a bit of solder on the pads... bend the cap leads into an L shape then cut them short so they just fit on the pads. Tin the cap leads with solder. Drop a small amount of liquid rosin flux on the pads then position the cap over the pads and use the hot soldering iron to seat the pins down onto the pads.

The liquid flux is a key item in that it helps keep the solder from going "cold" and forming peaks/bridges.

RJ
 
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