What chassis is this?

p1001

Well-known member
Joined
May 23, 2007
Messages
1,934
Reaction score
352
Location
Illinois
I pulled this from a nice working monitor that was broken on location. Tag has since fallen off and I don't know what it's from. I know it's a Wells. Also, anybody have a remote board for it or at least a good picture of one?

IMG_3676.jpg
 
Last edited:
I pulled this from a nice working monitor that was broken on location. Tag has since fallen off and I don't know what it's from. I know it's a Wells. Also, anybody have a remote board for it or at least a good picture of one?

IMG_3676.jpg

It's a Wells. I had 4 or 5 where the same transistor and resistor burned up on every one.

I think Wells sold a fix it kit for this model at one time.
 
What a coincidence, I went to look at a game I was having monitor troubles with and it is this exact one. I looked at the following from Ken's page:Common problems: Power applied, Monitor dead, No neck glow. Cause: Resistor R812, Transistor Q801, and Capacitor C807 are all bad and should be all replaced. Solution: Replace R812 (68 ohms, 1/2 watt), Q801 (2SC2073 or 2SD478 or NTE 375), and C807 (100 uf @ 16 volts). Check zener diode (7.5 volt) D805 for a shorted condition.
Top half of picture distorted (may have edge ripples in bad half, too). Cause: bad I302 chip. Solution: Replace I302 vertical output IC (LA7833). This IC should have high resistance (500k or higher) between pin 1 and the mounting tab. If resistance is considerably lower then the IC is bad internally.

It appears someone already worked on this chassis and replaced all the Resistors,Transistors,and caps mentioned above. I did notice that the Q801 looked burnt and the solder joints were loose so I removed the old solder and reflowed everything above.

Well I thought that did it cause the monitor fired right up with a nice picture, then I started hearing a sound (best way to describe is the static sound you get when playing an old scratched up record) and then the picture went out. A few seconds later it would come on again, make that noise and go out again. I can't tell where the sound is coming from it almost sounds like it's coming from that Yellow transformer looking thing in the picture earlier in this thread. It doesn't sound like it's the flyback and the flyback adjustments work fine. I did notice that when I hear that sound the screen starts to ripple on both Sides(top to bottom-not just one half like mentioned by Ken). Anyone know what my problem could most likely be?
Thanks
 
wow, this appears to be the same board I have in my Out Run project. Mine isnt working either but it looks very clean. No neck glow on mine.
 
Back
Top Bottom