Help with Sony PVM sync issues

tparis

Active member

Donor 5 years: 2015, 2017, 2019, 2022, 2025
Joined
Aug 7, 2015
Messages
564
Reaction score
37
Location
San Diego, California
HAPPY 4th!!!!!

Setting up a test bench to fix a Monaco GP.

Another KLOV member mailed me some BNC adaptors but until they get here another friend loaned me his.


Out of the game I have Red, Green, Blue, and 2 sync wires.


On the front of the monitor I pressed the EXT SYNC, LINE RGB, and H/V DELAY settings

Unfortunately I am unable to get the game to sync properly.

Based on these images can someone help me
get this working?

Thanks!

06ba129fb14cab5f200ab7300c0c316c.jpg


d9a6112090aea39248c341f253d6b80a.jpg


9ef201c41658c65e55bca2c614ed6bae.jpg
 
Stupid Question:
So would I ground from the switching power supply to the EXT SYNC?
If so does it matter if the ground is in the neg or positive input of the BNC adaptor?

Thanks!
 
Stupid Question:
So would I ground from the switching power supply to the EXT SYNC?
If so does it matter if the ground is in the neg or positive input of the BNC adaptor?

Thanks!


You need to supply video ground to the BNC connector(s). Connect the video GND from your video source to one of the minus (-) terminals and then daisy chain that to the other three if desired/needed.
 
Ok so here is my video out.
I have rgb and sync. On the bnc adaptor I have attached a ground from the switching power supply. Obviously I'm miss-understanding cause the image is the same.

6c837b587f6fa40dd950d9a13a48dc1a.jpg


505714f76d8da60dd0f87c878bcc2720.jpg


59e29e632a1a5759c19bb6f187242dfb.jpg
 
Last edited:
So... you have yours grounded but tell others not to ground theirs cause it's not needed...makes sense.
 
Do you even PVM bro... yes you need ground but only to one BNC connector since they are internally grounded!

lol, do you even electricity? Nothing works without a ground reference.

OP, based on what I see in the schematic, MGP outputs composite sync, so one of the yellow / gray wires is sync and the other is ground. If I was a betting man, I'd say gray is ground. Disconnect ground from the power supply, hook yellow into the + terminal of your sync balun and gray into the - terminal.

I have no idea if MGP outputs positive or negative sync, so you might need a sync inverter to drive the PVM, which only does negative sync. The buttons can be somewhat confusing. If you have a known good source of RGBS video, you can hook that up, set the PVM controls until you get a good picture, then connect MGP. That way, you know the issue isn't with the settings, and can concentrate on getting the adapter right.
 
lol, do you even electricity? Nothing works without a ground reference.

OP, based on what I see in the schematic, MGP outputs composite sync, so one of the yellow / gray wires is sync and the other is ground. If I was a betting man, I'd say gray is ground. Disconnect ground from the power supply, hook yellow into the + terminal of your sync balun and gray into the - terminal.

I have no idea if MGP outputs positive or negative sync, so you might need a sync inverter to drive the PVM, which only does negative sync. The buttons can be somewhat confusing. If you have a known good source of RGBS video, you can hook that up, set the PVM controls until you get a good picture, then connect MGP. That way, you know the issue isn't with the settings, and can concentrate on getting the adapter right.

What he said and why are there two wires connecting to the external sync?
 
I use a BNC to VGA cable and that same Mike's adapter. It's a nice clean looking setup. Glad you got it working.
 
That is not a picture of a working setup. Your horizontal sync is still not working correctly, which is causing the jagged areas on the side and possibly messing with the clamping values.
 
Back
Top Bottom