I've got a CRT here at work that suddenly went out of focus this morning. Any thoughts on causes, and if it can be fixed? IF it were a 15 or a 17, I wouldn't bother, but the 19 might be worth it if it's an easy fix.
-
Ludicrous gibs!
-
Re: KDS XFlat 19" CRT out of focus
If it suddenly went out of focus as opposed to a long, slow dimming/ fuzziness, its probably low voltage on the 140v. Check the caps is the ps section for a 160v-200v around 100uf to 300uf. -
Re: KDS XFlat 19" CRT out of focus
brightness is still fine... it just suddenly went fuzzy.;Ludicrous gibs!
Comment
-
Re: KDS XFlat 19" CRT out of focus
I have a 17" KDS that did the same thing. It has a very touchy focus knob on the flyback. Maybe that is the problem you have as well. Check solder joints and caps while you're in there too.Last edited by Maxxarcade; 09-23-2007, 02:28 PM.Comment
-
Re: KDS XFlat 19" CRT out of focus
The reason your focus went fuzzy is because the focus voltage supplied through the flyback dropped.
If the brightness is still fine try turning the focus POT on the back of the flyback with the monitor running. If that fixes it close it up and let it run and see if it slips back out of focus again.
It could be that one of the resistors inside the flyback voltage divider bit the dust causing the voltage to go off.
It couldn't be the supply voltage if it was the brightness would have dropped too.Elements of the past and the future combining to make something not quite as good as either.Comment
-
Re: KDS XFlat 19" CRT out of focus
There's probably a bad joint or bad cap somewhere in the flyback section - start by reflowing all beads that look dry or suspect. Then think about replacing caps.Comment
-
This specification for the HP ProBook 450 G9 + Voyager Focus 2 UC Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 450 G9 + Voyager Focus 2 UC boardview and 450 G9 + Voyager Focus 2 UC schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that...09-07-2024, 07:12 AM
-
This specification for the HP EliteBook 650 G9 + Voyager Focus 2 UC Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 650 G9 + Voyager Focus 2 UC boardview and 650 G9 + Voyager Focus 2 UC schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties...09-07-2024, 07:12 AM
-
I just recapped one of these (Tatung VM9AF). Now the image is badly out of focus. Mainly on the horizontal.
Rear focus pot. doesn't help in any meaningful way.
Anything else I can look at ?...01-11-2024, 08:16 PM -
Not having the best of luck with my own gadgets atm - I own two identical X15 R2 laptops, both have died suddenly with no prior issues. I have time to focus on one of them and in this post. I might need some hand-holding with this so I kindly ask for some understanding
Make: Alienware
Model: X15 R2
Motherboard: LA-L611
CPU: i9-12900H
GPU: RTX 3080Ti
History: I was using the machine as normal when it suddenly switched off and never came back on. I've owned the machine for over a year and use a Dell Thunderbolt Dock to charge my laptop with.... -
Hi all I have a Krell KPS-28c hi-end CD-player which I replaced the laser since the old one had very low RF output.
Now the RF level (eye pattern) is about 1.8V peak to peak.
The problem is it skips like 5-10 times per CD.
I have been looking into focus and tracking errors and try to diagnose.
The CD-drive is a TEAC VRDS-7.
On the focus error testpoints there are some jumps in the waveform while I see not such issues on the tracking error testpoints.
Anyone know the procedure of an adjustment of this drive?...
Comment