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Main => Monitor/Video Forum => Topic started by: AMDman13 on July 30, 2015, 09:34:59 pm

Title: Tri-Sync Is changing frequencies on the fly a bad thing?
Post by: AMDman13 on July 30, 2015, 09:34:59 pm

For the past 9 years I have owned a Betson Kortek Multisync (tri-sync) that I have put through its paces. I run 640x480 at 31khz for my frontend and constantly switch frequencies to 15khz for games. Never thought anything about it until stumbling upon some readings recently that state this is not a good thing.

What is the popular understanding? Is it hard on the Monitor to do this? If so, I have totally abused mine over the years.

Title: Re: Tri-Sync Is changing frequencies on the fly a bad thing?
Post by: grantspain on July 31, 2015, 07:35:51 am

the kortek does it using mosfets,you should just keep an eye on the solder and caps

Title: Re: Tri-Sync Is changing frequencies on the fly a bad thing?
Post by: AMDman13 on July 31, 2015, 08:26:43 am

Quote

the kortek does it using mosfets,you should just keep an eye on the solder and caps

Thanks grantspain,

So, I should be fairly safe switching on the fly? Is there any benefit to keeping it at 31khz and using software scanlines? Oh yea, forgot to mention mine is the Kortek KT-2914

Title: Re: Tri-Sync Is changing frequencies on the fly a bad thing?
Post by: grantspain on July 31, 2015, 09:01:15 am

i have worked on a few kt2914 and they designed to take frequent resolution switching,they were used on raw thrills fast and furious and that switches through a fair resolutions before it goes to game screen

just watch the bad solder joints and caps like i said

Title: Re: Tri-Sync Is changing frequencies on the fly a bad thing?
Post by: AMDman13 on July 31, 2015, 10:40:26 am

Thanks. I would imagine keeping it cool is important? I keep one of my back panels open and have a small 80mm PC fan above it for exhaust. Any other suggestions?

Title: Re: Tri-Sync Is changing frequencies on the fly a bad thing?
Post by: grantspain on July 31, 2015, 01:58:35 pm

there are a few common faults on 2914 chassis
mosfets get bad solder joints and you get a nicely burnt up or destroyed circuit board-and i mean proper destroyed with a big hole in it
vertical deflection ic shorts and takes out a number of resistors around it
caps go leaky due to poor layout of circuit board
flyback goes off on one normally causing a picture about 5 times normal size

Title: Re: Tri-Sync Is changing frequencies on the fly a bad thing?
Post by: AMDman13 on July 31, 2015, 02:53:09 pm

Yikes. I see if I can find the schamtics and take a look at how there doing.  So, no real advantage of keeping it at the same freq?