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Naomi Monitor issue

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digweed View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote digweed Quote  Post ReplyReply Direct Link To This Post Topic: Naomi Monitor issue
    Posted: 07 Nov 2019 at 6:57am
Hi all, 

Wondering if anyone has any advice on how to fix this screen or any tips? Monitor turns on from start but displays lines running across the picture and is quite bright. Can barely see the naomi logo when it starts up and nothing afterwards. 


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big10p View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote big10p Quote  Post ReplyReply Direct Link To This Post Posted: 07 Nov 2019 at 8:08am
Turn down the screen pot on the flyback/lopt. Seems like an issue in the bottom right. Maybe degauss isn't working or something nearby is affecting the screen.

Edited by big10p - 07 Nov 2019 at 8:09am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gunblade Quote  Post ReplyReply Direct Link To This Post Posted: 07 Nov 2019 at 8:22am
looks like red and green guns full on or blue gun dead with 200v missing
if you disconnect the video signal does it display the same?
what chassis is this, a sanwa es31?

check neck card is fully home on the tube and see if brightness control/screen volts has any function
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Post Options Post Options   Thanks (0) Thanks(0)   Quote digweed Quote  Post ReplyReply Direct Link To This Post Posted: 07 Nov 2019 at 9:59am
Originally posted by gunblade gunblade wrote:

looks like red and green guns full on or blue gun dead with 200v missing
if you disconnect the video signal does it display the same?
what chassis is this, a sanwa es31?

check neck card is fully home on the tube and see if brightness control/screen volts has any function

Yes unplugging the video signal gives me that picture when turning on the cab. I will need to take the monitor rear cover off and get in the back to take more pics and to identify the monitor. I'm pretty sure it is a sanwa but will confirm. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote digweed Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2019 at 9:29am

I have these controls on the chassis ^^

The lopt has two dials




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Post Options Post Options   Thanks (0) Thanks(0)   Quote digweed Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2019 at 9:34am
Think my chassis needs a bit of a clean Embarrassed
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Post Options Post Options   Thanks (0) Thanks(0)   Quote digweed Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2019 at 9:35am
Originally posted by big10p big10p wrote:

Turn down the screen pot on the flyback/lopt. Seems like an issue in the bottom right. Maybe degauss isn't working or something nearby is affecting the screen.

Will try test setup. Pressed the degauss button and no change. 


Edited by digweed - 10 Nov 2019 at 11:55am
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giupiaz View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote giupiaz Quote  Post ReplyReply Direct Link To This Post Posted: 13 Nov 2019 at 8:50am
Hello i see this red message of Xray Radiations it's dangerous?
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