Author Topic: Nanao MS720L (Kortek) - Sync Problems ? (Read 6499 times)

DarkSide · « **on:** November 23, 2008, 07:20:03 am »

Hi guys.

Just got a new monitor for my Sega hang on bootleg, but there are some problems.

Here is a picture:

Tried to connect both sync wires (White and yellow), and only white or yellow, and the picture dosent change.

Is it a sync problem, or is the chassis broken ?

grantspain · « **Reply #1 on:** November 23, 2008, 08:07:22 am »

it looks like a game board video error,did it work before you put the monitor in?

DarkSide · « **Reply #2 on:** November 23, 2008, 08:09:43 am »

Yes, it worked perfectly with a old Hantarex MTC 900/900E

The game runs in composite sync, it only got 1 sync wire.

grantspain · « **Reply #3 on:** November 23, 2008, 08:24:34 am »

ah right i see,have you tried the horizontal hold yet? and how many sync pins does the nanao have?

DarkSide · « **Reply #4 on:** November 23, 2008, 08:47:52 am »

Quote from: grantspain on November 23, 2008, 08:24:34 am

ah right i see,have you tried the horizontal hold yet? and how many sync pins does the nanao have?

Ya i tried the horizontal hold, dident help.

Sync pins ?

Its this chassis http://www.jomac.net.au/images/Chassis/Kortek_Copy%20of%20Nanao%20MS720L.JPG

grantspain · « **Reply #5 on:** November 23, 2008, 09:13:28 am »

have you tried the sync switch yet

DarkSide · « **Reply #6 on:** November 23, 2008, 09:15:40 am »

Nega and Posi switch ?

Yes

Its in the nega pos atm.

grantspain · « **Reply #7 on:** November 23, 2008, 09:17:24 am »

any other pots on the chassis,like slightly hidden-i can see 2 on the pic

DarkSide · « **Reply #8 on:** November 23, 2008, 09:27:21 am »

The hidden are:

Xray adjust
B+ Adjust
H-Sub Posi
V-Lin

grantspain · « **Reply #9 on:** November 23, 2008, 11:22:03 am »

none of those will help
where have you connected each wire for the video?

DarkSide · « **Reply #10 on:** November 23, 2008, 11:32:41 am »

The wires are connected right.

http://yousuck.dk/sega/DSC02782.JPG

Red to red, green to green, blue to blue, ground to ground, and h/vsync to sync

Just connected my old half broken hantarex monitor to the same wires, so im sure the game is working.

Even connected my mame pc to the kortek monitor, and got a picture, it was jumpy, but i could se the desktop icons.

grantspain · « **Reply #11 on:** November 23, 2008, 12:54:34 pm »

so your old monitor works fine on the hang on and the new monitor works fine with a mame pc

DarkSide · « **Reply #12 on:** November 23, 2008, 01:07:45 pm »

Quote from: grantspain on November 23, 2008, 12:54:34 pm

so your old monitor works fine on the hang on and the new monitor works fine with a mame pc

Yes.

Or fine and fine, as i wrote, i could see the desktop icons, the picture needed more finetuning, but it was atleast displaying a picture.

I just need to get the new monitor working in my Sega Hang on, the hantarex is broken.

grantspain · « **Reply #13 on:** November 23, 2008, 02:13:02 pm »

this is very confusing,if the new monitor works with mame then it works
still looks like video error to me from the game board

DarkSide · « **Reply #14 on:** November 23, 2008, 02:15:56 pm »

Quote from: grantspain on November 23, 2008, 02:13:02 pm

this is very confusing,if the new monitor works with mame then it works
still looks like video error to me from the game board

The game board is working fine, dident get a perfect picture on the new using my mame pc, but i just think the resolution was to high.

Dont know if the new monitor works with composite sync ?

grantspain · « **Reply #15 on:** November 23, 2008, 02:20:18 pm »

yes it works with comp sync on pin 5 and switch to negative

DarkSide · « **Reply #16 on:** November 23, 2008, 02:29:06 pm »

Quote from: grantspain on November 23, 2008, 02:20:18 pm

yes it works with comp sync on pin 5 and switch to negative

Hm i guess that monitor just don't work with that game pcb then.

grantspain · « **Reply #17 on:** November 23, 2008, 02:31:33 pm »

that monitor will work with any 15khz game pcb
i think your game board is the problem but difficult to say as i can't work out your fault finding process

DarkSide · « **Reply #18 on:** November 23, 2008, 02:34:51 pm »

Quote from: grantspain on November 23, 2008, 02:31:33 pm

that monitor will work with any 15khz game pcb
i think your game board is the problem but difficult to say as i can't work out your fault finding process

If the game board is the problem, why does it work fine with a Hantarex MTC900 and a Hantarex MTC900E ?

Only thing there is different are the RGB cable to the chassis

grantspain · « **Reply #19 on:** November 23, 2008, 02:39:36 pm »

so you tested it today with both a 900 and 900e chassis and the picture was fine

there are some strange possibilities,if the sync signal is little low for the nanao then that may cause the problem also check your +5 volt on the game board

DarkSide · « **Reply #20 on:** November 23, 2008, 02:55:35 pm »

Quote from: grantspain on November 23, 2008, 02:39:36 pm

so you tested it today with both a 900 and 900e chassis and the picture was fine

there are some strange possibilities,if the sync signal is little low for the nanao then that may cause the problem also check your +5 volt on the game board

Only tested with a 900 today, and yes the picture was fine.

The 5 volt is at 5.09

If the sync signal is to low, any way to raise it then ?

grantspain · « **Reply #21 on:** November 23, 2008, 03:07:05 pm »

try linking the sync wire and putting it on to one of the colour signals to see if you get a lock

DarkSide · « **Reply #22 on:** November 23, 2008, 03:17:31 pm »

This is what i get with the hsync wire connected to the red color.

grantspain · « **Reply #23 on:** November 23, 2008, 03:24:45 pm »

sorry i edited my post,put the sync back in the plug and then link a colour to it

DarkSide · « **Reply #24 on:** November 23, 2008, 03:26:20 pm »

Quote from: grantspain on November 23, 2008, 03:24:45 pm

sorry i edited my post,put the sync back in the plug and then link a colour to it

Just tried that, i get a red screen, with some flicker (Linked to the red color)

grantspain · « **Reply #25 on:** November 23, 2008, 03:33:24 pm »

does the sync switch have any affect now with the sync linked

DarkSide · « **Reply #26 on:** November 23, 2008, 03:36:27 pm »

Only the same as before.

But still cant get a sync lock.

grantspain · « **Reply #27 on:** November 23, 2008, 03:39:04 pm »

o.k just compared your chassis to jomac one,they are slightly different
your sync should be connect to pin 6 the white wire of the chassis video plug

DarkSide · « **Reply #28 on:** November 23, 2008, 03:49:53 pm »

With sync connected to the white wire:

With sync linked to the red wire:

grantspain · « **Reply #29 on:** November 23, 2008, 03:55:36 pm »

are you using the same loom for the hantarex monitor?

DarkSide · « **Reply #30 on:** November 23, 2008, 03:57:42 pm »

Yes, the only thing switched is the RGB cable to the monitor, hantarex is using a different one.

grantspain · « **Reply #31 on:** November 23, 2008, 03:59:55 pm »

where do you have the interconnection?and can you post a pic please

DarkSide · « **Reply #32 on:** November 23, 2008, 04:02:07 pm »

Its connected here: http://yousuck.dk/sega/DSC02782.JPG

Down in that white one, im not sure what the right english word is, sorry.

grantspain · « **Reply #33 on:** November 23, 2008, 04:08:46 pm »

no i meant can you take a photo of where you join the video signal wires from the new loom to the old loom

DarkSide · « **Reply #34 on:** November 23, 2008, 04:11:00 pm »

Thats in that white one, i just removed the old, and connected the new.

grantspain · « **Reply #35 on:** November 23, 2008, 04:17:29 pm »

yeah i was trying to see where you connected the new loom to your game board

DarkSide · « **Reply #36 on:** November 23, 2008, 04:24:08 pm »

Sorry, im not sure what you mean ?

The only thing different between the hantarex and the Kortek, is the monitor cable (RGB, Ground, Sync)

But its color coded, so i just removed the old one from the white thing, and put the new one in.

Thats all ive changed, if i connect the hantarex cable and the monitor agian, the picture is fine.

grantspain · « **Reply #37 on:** November 23, 2008, 04:27:31 pm »

you should have 5 wires for video red,green,blue,ground and sync from the game board
can you show a pic where these connect to the new video loom
you must have had to join the wires together somewhere

DarkSide · « **Reply #38 on:** November 23, 2008, 04:33:03 pm »

They connect here:

http://yousuck.dk/DSC02793.JPG

They was not mounted when the picture was taken, but they are now.

DarkSide · « **Reply #39 on:** November 23, 2008, 04:58:57 pm »

Here connected: http://yousuck.dk/DSC02796.JPG


Main	Restorations	Software	Audio/Jukebox/MP3	Everything Else	Buy/Sell/Trade
Project Announcements	Monitor/Video	GroovyMAME	Merit/JVL Touchscreen	Meet Up	Retail Vendors
Driving & Racing	Woodworking	Software Support Forums	Consoles	Project Arcade	Reviews
Automated Projects	Artwork	Frontend Support Forums	Pinball	Forum Discussion	Old Boards
Raspberry Pi & Dev Board	controls.dat	Linux	Miscellaneous Arcade	Wiki Discussion	Old Archives
Lightguns	Arcade1Up	Try the site in https mode		Site News


Unread posts \| New Replies \| Recent posts \| Rules \| Chatroom \| Wiki \| File Repository \| RSS \| Submit news