G05-802 ?'s

Talon2000

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Ok first is the HV supposed to be 12k, or 14.5K

CapKit done, and new HV diode in place. Still get a very small amount of wiggle/jitter is this normal for these monitors?

Lasty, are the connectors going from the transistors to the deflection board crappy? I keep loosing the bottom half of my asteroids, and keep having to reseat the cable to get it back.
 
Might need to replace the 2 big black caps, listed as these on Bob Roberts site :

6800uf50volt radial for XY monitors

or the linearity pots, i think its these :

G05 Deflection Bd Replacement Pot Kit (6)

and did you reflow solder over the connector pins ?
 
Good point on the power caps. I'll have to check on those.

Flow solder over the pins, or just re-flow the solder side? Because I've re-flowed the pins on the solder side.
 
Yea, I ordered the Cap Kit for my G05-805 Montior. However, it didn't come with the 2 big black caps. So I just re capped all the ones that were sent with the kit. The picture was more stable, but would "breath" every time some words would flash on and off. I ordered/replaced the 2 big black caps and that took care of that problem. Also replaced Big Blue and that helped also. Monitor works a hellofva lot better then when I first got it.


;
 
So back to this monitor. Still need to know what the HV is supposed to be.

No after about 30 mins the screen blooms to 2X in size zooming everything up. The HV diode has been replaced, and complete caps..

Possible flyback problem?
 
Check all EHT connections and transistor connections within the EHT unit.
 

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High voltage should be 14KV. If the picture is too big the HV is probably too low. One thing to watch out for that caused me a major headache. When readjusting the picture size in an xy monitor the further to the edges it is adjusted, the more strain that is put on the deflection circuits(especially horizontal deflection circuit). I had replaced all the shorted transistors only to find the spot killer kick in. Reflowed all solder joints and it was fixed...for a few days then spot killer was intermittant. I had adjusted picture to cover the whole screen. Actually on xy games you should stop short by a centimeter or two. It relieves a lot of stress on the deflection transistors and the shroud is intended to cover the edges of the monitor anyway.
 
Nope. If we are talking the 19 inch it is 14kv. Maybe you are thinking of the 13 inch. I just double checked my manual. My asteroids deluxe is at 14kv.
 
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According to page 3 of my Electrohome G05-802 manual it reads:

12.0KV at zero beam current

Not sure what manual you're reading my friend. It's the same voltage for both the 15" and 19" model BTW....and the 15" model is the G05-805.

I just rebuilt my Bzone's G05-802 and thought it should be 14KV myself... but it's not.

BTW - They don't make a 13" g05-802.

EDIT: Here... I've highlighted the two places it states 12KV. Please, I'd be interested in seeing your manuals page that states 14KV... different edition perhaps?

G05-PAGE3.jpg
 
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I just hope he doesn't keep running his at 14KV... not sure what the extra 2KV will do, but I'd imagine over time it'll burn something up.
 
Lasty, are the connectors going from the transistors to the deflection board crappy? I keep loosing the bottom half of my asteroids, and keep having to reseat the cable to get it back.

They don't get any crappier than IDC connectors. Change them out to Molex connectors and it will help out a lot.
 
Well it looks like my schematics for the electrohome G05-802 had been mixed in with the G05-801 and I didn't even notice. The hv for the G05-801 is 14kv but is 12kv for the 802. The G05-802 manual did say it could be adjusted anywhere from 10kv to 14kv but optimal at 12kv. Sorry my bad.
 
Wow almost 4 months and this thread is still getting love.
I guess an update would be in order. HV was set at 12KV, and connectors cleaned. So far no problems.
 
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