dawilson123
n00b
- Joined
- Jun 22, 2023
- Posts
- 3
Neo Geo MVS consolised issues
Hi,
I bought a very rough mvs consolised. It's a MV1B1 with Neobiosmasta v1.7 and unibios v4.0. It's has a hardconsole supergun v1.1 attached.
MVS:
www.mvs-scans.com
To be honest, the soldering was some of the worst I've ever seen.
Whoever had made it had stuck the plastic panels on to enclose the boards with a gallon of hot glue.
Took a lot of IPA to clean off all the hot glue and crud on the board.
I also cleaned up the soldering.
There was a missing pad (pin 2 to 'Mask 1' IC) on the board for the neobiosmasta chip enable (ce) connection. I had to remove the 'Mask 1' IC, to trace the connection to the lost pad. The grinding pen was very useful on the trace conformal coating.
I traced it to the test pad below pin 30 on the CPU. I think this is correct but don't know 100%.
Photo:
ibb.co
It looks like the audio is modified for stereo output:
Example: https://www.jamma-nation-x.com/jammax/images/tuts/MV1B-stereo-mod.jpg
Photo:
It also has a janky scart cable extension. Plugging the scart from the TV directly into the supergun makes no difference.
Any way, without a cart plugged in (I don't want to risk destroying a cart at this stage) it displays weird block and intermittent solid colours. Adjusting the pots on the supergun changes the RGB.
Photos of the issue is here:
ibb.co
ibb.co
ibb.co
I haven't been able to find any info online on the supergun which is ridiculous considering its copyrighted 2021, so only 2 years old.
I've checked the continuity across the board edge connector between the supergun and mvs. No issues.
So does anyone have any ideas what the issue could be?
Did I solder the CE to the correct place (board diagrams are thin on the ground online)?
Does anyone have any info on the supergun?
Some more photos:
Hi,
I bought a very rough mvs consolised. It's a MV1B1 with Neobiosmasta v1.7 and unibios v4.0. It's has a hardconsole supergun v1.1 attached.
MVS:
MV1B1 - MVS
To be honest, the soldering was some of the worst I've ever seen.
Whoever had made it had stuck the plastic panels on to enclose the boards with a gallon of hot glue.
Took a lot of IPA to clean off all the hot glue and crud on the board.
I also cleaned up the soldering.
There was a missing pad (pin 2 to 'Mask 1' IC) on the board for the neobiosmasta chip enable (ce) connection. I had to remove the 'Mask 1' IC, to trace the connection to the lost pad. The grinding pen was very useful on the trace conformal coating.
I traced it to the test pad below pin 30 on the CPU. I think this is correct but don't know 100%.
Photo:
Screenshot-20230622-182144-Chrome hosted at ImgBB
Image Screenshot-20230622-182144-Chrome hosted in ImgBB
It looks like the audio is modified for stereo output:
Example: https://www.jamma-nation-x.com/jammax/images/tuts/MV1B-stereo-mod.jpg
Photo:
It also has a janky scart cable extension. Plugging the scart from the TV directly into the supergun makes no difference.
Any way, without a cart plugged in (I don't want to risk destroying a cart at this stage) it displays weird block and intermittent solid colours. Adjusting the pots on the supergun changes the RGB.
Photos of the issue is here:
Screenshot-20230622-185724-Gallery hosted at ImgBB
Image Screenshot-20230622-185724-Gallery hosted in ImgBB
Screenshot-20230622-185716-Gallery hosted at ImgBB
Image Screenshot-20230622-185716-Gallery hosted in ImgBB
Screenshot-20230622-185703-Gallery hosted at ImgBB
Image Screenshot-20230622-185703-Gallery hosted in ImgBB
I haven't been able to find any info online on the supergun which is ridiculous considering its copyrighted 2021, so only 2 years old.
I've checked the continuity across the board edge connector between the supergun and mvs. No issues.
So does anyone have any ideas what the issue could be?
Did I solder the CE to the correct place (board diagrams are thin on the ground online)?
Does anyone have any info on the supergun?
Some more photos:
Last edited:
