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B+ For Kaga KZ-20EN / Sega MC-2000-S
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Question
Grish
Howdy All,
Picked up my first arcade cab a few days ago, It needs a little work :\
Starting with the monitor, I've got a few issues and questions, hoping you guys will be able to help me out...!
Ok so first of all, the Monitor is a Kaga KZ-20EN with the irreplaceable flyback :( I obviously had no idea this wasn't a serviceable monitor when I bought the unit, all well. It has been capped/serviced by Jomac, apparently just last October.. (it's got a Jomac sticker on it too) - Chassis is a little different (but basically identical apparently) to the Sega MC-2000-S which has a Video Bias pot and only two horizontal jumper options (no "middle" option) and a few other differences I've manually observed.
Whilst the picture overall is pretty good, there are various issues with Width, and jaggered / wavy edges that appear more evident depending on the picture. Here's a pic running WBML with the chassis width jump set to "middle" (there's only "middle" or "wide" options and wide is too "wide", middle is too narrow) I haven't dared attempt poking about at the H-Width Coil, plus Jomac (or someone) smothered it in hot snot... probably for a good reason!
The other thing is there doesn't appear to be anywhere to plug in the two socket Deguassing coil plug, according to the Sega's manual / schematic it should be along side the neck board, but mine appears to be non-existent. I've read they can be a little useless anyway, but I don't currently have a wand.
I have slightly adjusted the screen pot/dial (near flyback) to remove some horiz lines on dark backgrounds, and that's all good now. But I am completely lost in figuring out how to test/adjust the B+ DC voltage... I really want to check this as I've heard this can help with Horiz issues.
Hoping someone can help, I know the standard advise is to immediately ship it back to Jomac, but I bought this machine to tinker / learn / hobby more than actually to play games on, so I want to learn stuff too :)
Weird jaggered / wavy and "pulsating" edges / lines:
No FG attached to switching PSU, should I add one?:
The Nanao KB240331D Chassis, Is this the B+ pot?? and if so, where exactly do I put multimeter to measure the DC voltage?:
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