Build Your Own Arcade Controls Forum
Main => Monitor/Video Forum => Topic started by: Level42 on January 13, 2007, 08:56:26 am
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I'm currently installing the capkit for my WG K4500 that I received from Zanen Electronics. I noticed some values differ from the original values on the monitor. I'm not too worried about it, since sometimes more capacity (or voltage) is "better" I guess, but for one certain C there is a big difference to a lower value.
C754 (which is a bipolar capacitor) is orignaly 100uF (25V) but the capkit provides a 2,2 uF (50V) replacement. I thought that is a very big decrease in capacity. Maybe there's a good reaon for it, but I don't dare to start-up the monitor now (I did replace it already)....
Any ideas ? Thanks
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OK, nobody seems really interested, but who knows, someone in the future might be looking for this info:
Regarding C754, i mailed Zanen about it, and they said they believed they made a mistake. They suggested to keep using the old (original 100uF (25v) bipolar........
Anyway here is the list of the Wells Gardner K4500 Zanen #207 capkit. I've added some info which I found out while installing it:
The kit includes a pot, VR201 that's on the video interface board (center board). As the Zanen manual suggests, it is best to remove the old VR201 and install the new one on the solder-side of the board since it's easier to adjust it this way when the board is mounted on the main PCB.
- C3.. are on the video board
- C5.. are on the sound board
- C7.. are on the main board
VR201 2.5K Potentiometer
C304 47 uF - 50V or 63 V ( I believe this is an error. This should be C306 instead IMHO, C304 is a NORMAL capacitor and NOT an electrolytic cap ! This is confirmed by the values, they correspond.
C308 1 uF - 50V
C310 4.7 uF - 50V or 63V
C355 4.7 uF - 50V or 63V
C357 10 uF - 50V
C503 10 uF - 160V
C722 10 uF - 160V
C723 47 uF - 200V
C724 22 uF - 250V
C725 1 uF - 50V
C726 100 uF - 160V (was 47 uF originaly on my monitor)
C736 10 uF - 160V
C743 10 uF - 250V
C744 22 uF - 250V
C745 470 uF - 25V
C754 2.2 uF - 50V BP =====>>> THIS IS WRONG, KEEP OLD VALUE=100 uF BP !!!!
C759 100 uF - 50V
C761 10 uF - 50V
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This monitor is not common. I've not encountered one. It's ancient.
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Wow, if KEN hasn't seen it yet......amazing !!!
Well, indeed 27 years old and it did still run. But the convergence was poor, and I couldn't get it much better (getting it worse was a lot easier).
After installing the cap-kit, things hadn't improved, the contrary it made things worse.
I decided that I would have to get a "new" monitor for my Galaxian and scrapped the 4500......it hurt a bit, but everything has it's end.....
I got a second hand Philips TV and used the SCART to connect it: Great to have such a cheap arcade monitor replacement. Just €30,-......
Another lesson learned........