Solder
Member
I have a Time Crisis boardset (in the 'cage' of course) with a suitable JAMMA adaptor, just having a fiddle with it for the hell of it.
An error is appearing when you go into the:
DSP PCB Test
It's Test 7 which is failing with an error on Point RAM
However, even though the test is for the DSP board, this error ONLY occurs when a certain faulty ROM board is plugged in (ie the board with the many mask ROMs on it).
The fault is showing as assorted corrupt graphics.
I also have another fault on another ROM board - no errors this time, but a lot of the text graphics are slightly doubled up horizontally.
I have an extender cable which allows me to work on the board while it's outside the cage with it running.
Anyone have any experience repairing Namco Sys 22 boards? I'm just dabbling here, it's a new experience working on these and I like an interesting challenge.
It seems strange that there isn't a specific test which will actually identifiy any suspect RAMs and ROMs.
Thanks
An error is appearing when you go into the:
DSP PCB Test
It's Test 7 which is failing with an error on Point RAM
However, even though the test is for the DSP board, this error ONLY occurs when a certain faulty ROM board is plugged in (ie the board with the many mask ROMs on it).
The fault is showing as assorted corrupt graphics.
I also have another fault on another ROM board - no errors this time, but a lot of the text graphics are slightly doubled up horizontally.
I have an extender cable which allows me to work on the board while it's outside the cage with it running.
Anyone have any experience repairing Namco Sys 22 boards? I'm just dabbling here, it's a new experience working on these and I like an interesting challenge.
It seems strange that there isn't a specific test which will actually identifiy any suspect RAMs and ROMs.
Thanks