Repair Help Needed For Unisonic Tournament 2000

[Orrko]

Hi All,Am New-Bee To Console Repairs,Have A UniSonic Tournament 2000 Not Projecting Game Picture,Only Shows Static,However When Reset Button Is Pressed The Screen Goes Black Then Back To Static,Have Used Both Channels 3+4,Checked PWR Supply Voltage Inside Console And Is Good From Tip Through Power Jack To Wires To Main-Board,Have Replaced New RF Cable,Using New "F" Adapter To TV Cable Connection.

Also Have Tried New Old Stock Power Supply With No Better Results? TV Being Used Plays Other Systems Such As Atari 2600+Nintendo On RF Side.Is It Time To Check In The RF Modulator?

Any Help Greatly Appreciated.

[+Stephen Moss]

I know nothing about this system, however generally speaking I am not sure the RF modulator is the problem. If the modulator was faulty (i.e. no output) it would be reasonable to expect to see either static all the time or some kind of distorted image.

 

However, as you get a black screen upon reset when presumable all the video outputs are set to 0 suggests that the RF modulator may be working and that the problem may lie elsewhere (rubbish going in = rubbish coming out). However that is just speculation on my part and thus is not necessarily correct.

[Orrko]

Thanx For The Help,There Is Hardly Any Information For This System And It Has A 2 Piece Mainboard Similiar To Desoldering A NES Modulator,Am Going To Continue Searching For Info,The Board From What Can Be Seen Does Not Have A Standard 5-Volt Regulator As Most Systems Have.

[douglie007]

This is an old post but, Have you checked the 3 caps.  I had one the caps was bad in.  After changing them it's working nicely. And yeah the chip that's in the consoles runs on a voltage between 6.5 and 12v