WG 4600 help/hate thread.

smpoponi

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What is it gonna take for my luck to improve on this model? I have a tron that I need working for an event on thursday and I just cant win. Here is my issue:

1. 4600 was part of my test bench, it needed a cap kit but was great for just making sure PCBs worked so I mounted it on the bench and used it for almost a year. Was a little fuzzy and had some wavy-ness but who cares.

2. I needed a monitor for my Tron (had a 4900 in it I couldnt get working) so I decided to cap the 4600 and drop it in the tron. I capped and reflowed the whole thing and hooked it back up to the test bench and only get a blue screen with raster lines while hooked up to a galaxian PCB.

3. I took it over to tron and same thing. Jiggled the cards, swapped em out for known working cards and no change.

4. Help me.

5. I have 3 4600 chasis that I wanna go "office space" on.

Any Ideas where to start?
 
First turn the brightness (both the screen pot on the left daughtercard and the black pot on the neckboard) down until the raster lines go away. Then turn the blue down a bit. Disconnect the blue signal from the input to seee if the blue background goes away.

Go back over every single cap and make sure it is in correctly, hasn't had a trace lift, and no solder-splash shorts are evident.

Check to make sure that you didn't bend a pin on the neck while putting on the neckboard. Also, check the neckboard for cracks.

Recheck those pins from and to the daughtercards for bad solder joints or broken traces.

If you swapped in good daughtercards, then your problem is obviously on the main chassis, so start at the video input and follow it through to the neck pins...
 
What is the "P" number of the video interface cards? Some have different input pinouts that others.

If you got your capkits from Zanen Electronics, then there was a new "black level" pot included for the video interface board. Did you install it? Did you also adjust it? The new pot will have to be adjusted.
 
I didnt install the new pot (bob roberts kit). I also get the same results whether I have the monitor connected to video input or not.

I did notice on closer inspection that 2 ceramic caps are missing on the neckboard, c409 and c410. If other caps from the kit were in backwards wouldnt it blow a fuse? Ill double check this afternoon.

Screen pot and brightness control have a very small effect on the ratser lines.
 
Alright, so I got over being mad and took another look at the monitor.....

I checked all the caps and they were in right so I then checked the neckboard for cracks and noticed that I got a little sloppy and some solder was bridged....I cleaned it up and viola!

Thanks for motivating me to recheck my work, I seriously get so jaded with the 4600 model.

I guess those missing caps dont really matter.

One small problem is that the image is sitting a little low on the tube so the credits graphic is cut off. Is there a hoz pos on this monitor?

Thanks.
 
monitor

Usually you can adjust this out with the horz freq. coil. you can adjust this with a plastic or metal screwdriver(becareful) through a hole in the metal in front of the coil which is on the right daughter board.
 
One small problem is that the image is sitting a little low on the tube so the credits graphic is cut off. Is there a hoz pos on this monitor?

Thanks.

Some of the left daughtercards have a horizontal position pot and some don't.

But all main chassis' should have the horiazontal raster shift pins...

4600controls-1.jpg
 
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