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Title: Dim monitor. What do I test/look at next? Post by: Desolis on October 05, 2015, 06:03:32 am Hey all,
So I picked up my first cabinet a couple of weeks ago. It plays but the monitor (WG K4914) is incredibly dim. To see anything, lights that are in the room have to be off. I've managed to get the colors and focus looking good, but turning up the brightness from the flyback just makes the picture worse. The previous owner told me he already capped the monitor (though I'll probably do that again anyway to be sure), and now I'm trying to figure out what I should do/test next. I've tested voltages from the power supply and the board and they check out fine, but I'm not sure where on the chassis to test the b+ voltage or what else I can test for that matter. Can I find this information in the manual? Is there information in the chassis diagram? I'm new to reading these diagrams and I'm not really sure what I'm looking for. Title: Re: Dim monitor. What do I test/look at next? Post by: iankellogg on October 05, 2015, 07:41:49 am What does the image look like when you turn up the brightness?
Pictures help a lot. Title: Re: Dim monitor. What do I test/look at next? Post by: Desolis on October 05, 2015, 02:29:54 pm Of course. My apologies, I had some on my phone, and I should have thought to post them when I started the thread.
Night: (the camera picks up a bit more than just my eyes do in the night photos, it's a little bit dimmer than what appears.) With screen brightness turned up from flyback: http://i.imgur.com/FhJzb9K.jpg With screen brightness lowered and focus a little more dialed in: http://i.imgur.com/9200JtK.jpg Day: Without changing anything from the previous image. http://i.imgur.com/eujB1GE.jpg Title: Re: Dim monitor. What do I test/look at next? Post by: iankellogg on October 05, 2015, 02:36:44 pm if you crank the brightness on the flyback up all the way is it still really dim?
Title: Re: Dim monitor. What do I test/look at next? Post by: Desolis on October 05, 2015, 02:40:22 pm Yeah, It just kind of washes the colors out, but there's no actual increase in brightness/glow.
Title: Re: Dim monitor. What do I test/look at next? Post by: iankellogg on October 05, 2015, 02:47:45 pm It may be possible that the tube is just tired. If you can find someone with a rejuver that would be the best place to start I think.
Title: Re: Dim monitor. What do I test/look at next? Post by: Desolis on October 05, 2015, 02:51:54 pm Hm, okay I'll have to see what I can find, thanks for taking a look. Maybe this is a good excuse to buy a rejuver :P
Title: Re: Dim monitor. What do I test/look at next? Post by: jtslade on October 05, 2015, 08:29:06 pm Maybe just replace the fly back
Sent from my iPad using Tapatalk Title: Re: Dim monitor. What do I test/look at next? Post by: Desolis on October 06, 2015, 12:53:06 am Yeah I thought about trying that, but I'd like to do some further testing to try to figure out if that's indeed necessary. From what I've read they don't go bad very often and I'm not at all sure how to determine the likelihood of that being the case. I still need to find where/how to test the b+, little by little I'm working my way towards either a fix or a scrap and replace. Hopefully not the latter, as that's pricier than I can afford right now. Here's hoping I can get my hands on a rejuver fairly cheaply too.
Title: Re: Dim monitor. What do I test/look at next? Post by: offset on October 06, 2015, 10:41:23 am I have a WG K7000 that is doing the same thing, tried rejuv, still dim. The only thing left for me to try is a new flyback, otherwise I'll assume the tube is worn out.
Title: Re: Dim monitor. What do I test/look at next? Post by: Desolis on October 06, 2015, 09:56:45 pm Hopefully that does it for you. The thought of having to buy a whole new tube...My wife would not be pleased with me.
Title: Re: Dim monitor. What do I test/look at next? Post by: KennyL on October 07, 2015, 04:15:05 am Just remember, if a cap kit and new flyback don't fix the issue you do at least have a full spare chassis and board set. All you'd really be tossing out would be the tube it's self. Try everything you can before you toss anything, though.
Title: Re: Dim monitor. What do I test/look at next? Post by: offset on October 07, 2015, 11:43:37 am I've not tried it myself, but from what I've seen on forum posts, the K7000 chassis is pretty good for matching with donor crt tubes.
Title: Re: Dim monitor. What do I test/look at next? Post by: jtslade on December 02, 2015, 08:47:53 pm Any update, pics or just any thoughts.. Hope all is arcade goodness
Sent from my iPhone using Tapatalk Title: Re: Dim monitor. What do I test/look at next? Post by: iankellogg on December 05, 2015, 11:58:22 pm i have not ever run across a situation where the flyback was marginal and causing color problems.
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