DK Monitor - Sanyo 20EZV (no vid or sound)

RickB68

New member
Joined
Aug 2, 2010
Messages
83
Reaction score
0
Location
Jacksonville, Texas
...but I do have a smell coming from the monitor/chassis area when the game is turned on. :( Again, I have no sign of video (no flicker or anything) and absolutely no sound. I have no idea what direction to go from here unless it's just find a whole replacement.

You can catch up on what's going on here (Post #32 thru current):
http://forums.arcade-museum.com/showthread.php?t=152289&page=4

Thanks for any help!
 
Ok, well I found this.
Sanyo20EZVFlowChart.jpg




I guess I'll give this a try if I can figure out what I'm doing ;) and I'll report back one way or another



.
 
The above diagram though doesn't really address the sound issue. My digital meter decided not to work last night so I have to get a new one. More later, but if anyone has thoughts, please let me know.

Thanks!
 
The audio amplifier in Nintendo games on the monitor chassis, and is powered by the monitor's power supply. So, if that's dead, you get no sound.

Sounds like you've got something blown. Check the 300ma fuse on the back of the chassis, as well as that big ceramic resistor. I'm going to guess that someone replaced that fuse with a larger one, and now the ceramic resistor is sitting there cooking. Just a hunch... seen it before...

-Ian
 
The audio amplifier in Nintendo games on the monitor chassis, and is powered by the monitor's power supply. So, if that's dead, you get no sound.

Sounds like you've got something blown. Check the 300ma fuse on the back of the chassis, as well as that big ceramic resistor. I'm going to guess that someone replaced that fuse with a larger one, and now the ceramic resistor is sitting there cooking. Just a hunch... seen it before...

-Ian

The fuses were good and if this white thing in the pic (arrow pointing to it) is a resistor which I suspected, it gets VERY hot.

resistor.jpg



So, if the fuse is bigger than what is supposed to be there, I assume the correct one would blow. If so, do you know what might cause it to blow?
 
The fuses were good and if this white thing in the pic (arrow pointing to it) is a resistor which I suspected, it gets VERY hot.
Yeah, that's the resistor I was talking about. It's probably what's producing the smell. It should not get that hot - if you leave it like that long enough, it'll crack apart from the heat.

So, if the fuse is bigger than what is supposed to be there, I assume the correct one would blow. If so, do you know what might cause it to blow?

That fuse is supposed to be 300ma. See what it's actually marked as - it's probably much bigger. The correct 300ma fuse would have blown. That's the B+ power supply line. Chances are, you have a blown horizontal output transistor (HOT). Check to see if it's shorted. You may need a flyback - the blown HOT is usually a symptom of a failed flyback. Chad at ArcadeCup has replacements.

-Ian
 
Yeah, that's the resistor I was talking about. It's probably what's producing the smell. It should not get that hot - if you leave it like that long enough, it'll crack apart from the heat.



That fuse is supposed to be 300ma. See what it's actually marked as - it's probably much bigger. The correct 300ma fuse would have blown. That's the B+ power supply line. Chances are, you have a blown horizontal output transistor (HOT). Check to see if it's shorted. You may need a flyback - the blown HOT is usually a symptom of a failed flyback. Chad at ArcadeCup has replacements.

-Ian


Great info! Thanks so much!!!
 
Back
Top Bottom