Hi all,
I have, going on 15yrs old, a UAII Cab with a WinXP machine running MAME/Mamewah connected to a 27" TV via S-Video that hasnt skipped a beat until a few weeks back where the TV Chassis died. As this was the last spare chassis I had I thought I would purchase a new Arcade Chassis in the hope of upgrading to a better display. I bought a new WEI-YA chassis (829HRA), a J-Pac (second hand) and installed soft15Khz yet I'm unable to get anything close to resembling a picture. If anyone could assist in where I should start it would be much appreciated, the system has been working perfectly up to the TV chassis failure so I'm hoping its just a video configuraiton issue with my pc to the arcade chassis. I've detailed below how its hung together along with findings to date. I appreciate the setup is very old and this an opportunity to rebuild however I just dont have any time/funds left to really do - but I really, really, really dont want to switch to an led screen! Happy to post any further pics/info if it can help.
Setup1. PC WindowsXP running MAME/Mamewah: Installed Soft15khz, during setup it recognised my Video Card (ATI Radeon HD 3450) and I selected 15khz option.
2. PC Connections:
- Video Card: Connected the video cards DMS-59 output to DVI splitter to DVI-to-VGA adapter to the J-PAC VGA port.
- Keyboard PS2 Port: PS2 cable connected to J-PC Left hand PS2 Port (was previously connected to I-Pac).
3. J-PAC:
- Jumpers fitted to both 15khz and 31khz.
- Video Input connections as per Point 2 above.
- No controls (terminals) connected.
- Soldered wires onto J-Pac Jamma edge fingers as follows (didn't have a Jamma board connector):
- J-Pac Jamma (Component side) Pin 12 ('Video Red') TO chassis 5 pin connector Red wire ('R').
- J-Pac Jamma (Component side) Pin 13 ('Video Blue') TO chassis 5 pin connector Blue wire ('B').
- J-Pac Jamma (Component side) Pin 14 ('Video Ground (-)') TO chassis 5 pin connector Black wire ('E').
- J-Pac Jamma (Solder side) Pin 12 ('Video Green') TO chassis 5 pin connector Green wire ('G').
- J-Pac Jamma (Solder side) Pin 13 ('Video Synch') TO chassis 5 pin connector White wire ('S').
4. Arcade Chassis
- Chassis Power plugged into new 250W Isolated Step Down Transformer (I'm in Aus so needed to convert 220v to 110v)
- Chassis Neck connector attached to neck with TV shield (single female pin) connected
- Existing Tube Scancoils grey connector plugged into chassis
- Chassis Video lead connected to J-Pac (via a terminal block) as detailed above
- TV Degaussing loop connection not connected (have yet to look for the Chassis connection)
Results1. With just the Tube powered by the transformer (no PC powered) I get a grey/white screen with black horizontal lines
![](https://live.staticflickr.com/65535/53005455284_8a99a9f4c4_m.jpg)
2. With Tube powered and power supplied to PC (but not started):
- Tube displays same grey screen but has green block at bottom 1/15th screen
- J-Pac has LED's 'Self Test' = Green, 'Synch In' = Orange.
3. With Tube powered and PC turned on (booted)
- Tube displays green background with red and orange and purple almost horizontal lines
- J-Pac has LED's 'Self Test' = Green, 'Synch In' = Orange, 'Synch OK' = Green
![](https://live.staticflickr.com/65535/53005678090_3fd5b81db0_m.jpg)
Of note:
1. As the video card uses a DMS-59 connection (enables connection of two DVI cables outputting to two monitors using the correct adapter) I connected another DVI cable to the second DVI plug of the adapter and connected a PC LCD monitor. I get a perfect picture on the PC LCD monitor from starting the PC up to halfway through the MAME loading screen (WindowsXP configured/tweaked to boot directly into MAME) to which I then get a message displayed by the monitor saying 'Cannot display this video mode, please select..." - so I assume that means the PC is outputting at 15khz (together with J-Pac 'Synch Ok' LED being green)?
2 Following from the above I attached a USB keyboard and was able to (blindly) select a game (could hear the game sound), the screen appeared to change slightly (see pic below) albeit still a variance of horizontal lines - so I assume the picture is coming through just not displaying correctly?
![](https://live.staticflickr.com/65535/53005677880_8c6f6f210e_m.jpg)
3. The Chassis vendor (well respected in arcade community) couldn't immediatly see an issue with my chassis to Tube configuration (based on above description).