Sega Model 3 PSU and CPS2

[xodaraP]

Hi everyone,
I've come across a strange problem where I've desuicided a few CPS2 games for a guy and they work fine on my Supergun and Astro, but won't boot on his Versus City cab with Model 3 PSU.

The strange thing is, decrypted games boot perfectly, but anything with a battery or InfiniKey or PIC, no dice.

Has anyone come across a similar issue? +5 is 5.1 without load and drops to 4.9v with CPS2 connected.

I'm thinking it's possibly a current issue, but interested to know if anyone else has come across the same fault.

 

[ChicksOnLeashes]

I have a blast city which uses a model 3 power supply. I think it's the same, just in a different case??
I have some infinikey boards and they work perfect!
I had some PSU inconsistencies with the voltage causing games to reset randomly or not boot at all.
I first cleaned ALL the connections with deoxit, which didn't seem to do much. Recapped it which helped a bunch, but still kind of had random voltage drops.
Cleaned all the connection pins again, then after reconnecting, I decided to wiggle each wire individually while watching my volt meter... found there were a few pins that were not crimped very tight to their wires causing the readings to drop.
Extracted ALL of the power pins, re-crimped the crimps and haven't had a psu problem since.
Might not help, but it's worth checking?
Good luck!

 

[xodaraP]

Good idea, the owner is sending it off for a refurbish which probably isn't a bad idea anyway.

I'll make sure that he checks the wire crimps on the harness as well, thank you for the info