Frogger cocktail 13" monitor collapse

roburt

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Hi again to everyone. I aquired a frogger cocktail in pretty good shape. Fixed the sound issues but has vertical collapse. It is a 13 inch monitor with zero burn. I'm wondering if it's a replacement. The tube is marked sega, but the chassis is all in japanese. Any advise to be had? I'm new at monitor problems and am looking to find what general area of the board or yoke to check. Thanks in advance to anyone willing to help!
 
Thanks for you help. This frogger cocktail was purchased in rough shape and non-working. I have everything repaired and working except the monitor. It has verticle collapse. I think this is a replacement monitor as it has absolutely no burn. The tube has a japanese label on it. The chassis has no english printing on it as far as I can tell. I'm not very skilled at working on these and am looking for help / advise on this. Do you know what area of the chassis deals with verticle deflection? Attached are some pics taken with my lousy camara. Maybe they will help. Thank you.

*edit* I found what looks similar to a mitsubishi logo on the chassis. Similar to the mitsu but has small triangles on each of the three "legs". If I can get a pic, I'll share.
 

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Well, the first thing to do is pay attention to that label that says it runs on 100vac, and never plug it into 120vac.

2nd - you probably can't hurt by installing a cap kit, even though you'll most likely have to build your own. While you're doing so, you can look it over for cold solder, and try to identify the vertical deflection transistors for testing...
 
I measured the ac to the monitor. 105.0vac. How can I adjust this down? I had reassembled things as it was wired when I initially fired it up. Can you guys tell me how to check a transistor with a dmm? Lastly, would a bad resistor (assuming it's a resistor - it's clear w/ stripes) cause this condition? I found one with a broken leg on a small card mounted to the chassis. Thanks for your knowledge and expertise.
 
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The logo on the white resistors in the pic is the same as what's printed on the chassis. Also, the small card is where my broken leg on a diode(?) was found (marked D under the item on the board). It's the second from the bottom right. Any words of wisdom? Thank you.
 

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Ah, crap. That's not the same as mine at all. Thought I might be able to offer advice or parts but it's a no go.
 
Well the diode needs to be replaced for sure (see if you can read a number off any of them).

I would also say that the capacitors need to be replaced for sure - some of them look like they need it. ;)

...and as mentioned, you may need to replace the vertical deflection transistors as well...

Cheers,
 
I'm not sure how to check the transistors (or even which one's they are). Also, I had a guy tell me to check / replace the IC that is on the middle of the board on a heat sink. I's that something that should be done as well? Thanks.
 
Found out this is a 14" matsushita chassis. The small board with the bad diode on it (previous post) was attached to the chassis. It is marked "sega-2555". Anyone have a schem for this? I'm trying to find the value of the diods on it. Thanks?
 
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Got my cap kit for the matsushita. replaced my diode with a possibly compatible diode. I can't seem to find a # or value on this. I have yet to connect & test everything. I'm assuming the small pcb is for sync. Anyone agree or disagree?
 
I installed the cap kit and still the same collapse results. I also replaced both IC's on the board. Still vert collapse. Yoke measures okay. Any suggestions or does anyone have a chassis for this (working) for sale? I have a friend with a 13" G07 for sale. No chassis though. Would this take a standard 19" G07 chassis?
 
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