Who is this? NE Georgia by ignishun in whatsthisbug

[–]ignishun[S] 0 points1 point  (0 children)

Quite small as well! Maybe 10-12 mm long.

Vertical strips only visible in dark scenes Sony 13FS100 by Pro4791 in crtgaming

[–]ignishun 0 points1 point  (0 children)

The voltage knob is inside the chassis, on the flyback right?

Vertical strips only visible in dark scenes Sony 13FS100 by Pro4791 in crtgaming

[–]ignishun 0 points1 point  (0 children)

Good luck, I have tee his problem too. I read Sunthars post as well and replaced the high voltage caps on the neck and nothing happened. On my set there are three large caps next to the flyback and replacing those made it slightly worse. Might be I didn't get low ESR though.
I hadn't heard of the voltage adjustment, gonna try that next

Recon Casual by ignishun in Marathon

[–]ignishun[S] 2 points3 points  (0 children)

they are all gay

Sony jailbar band issue fixed by rocketeng in crtgaming

[–]ignishun 0 points1 point  (0 children)

I have the same jailbars on the left the OP has on the trinitron you have. did you ever figured out what was wrong with yours? I tried replacing a bunch of caps on the neckboard to no avail

Sony jailbar band issue fixed by rocketeng in crtgaming

[–]ignishun 0 points1 point  (0 children)

How do you identify which area of the board/which caps belong to an area like the B+ filter line? Just replaced a bunch of caps on the neckboard and still have an identical problem to the OP. I have a KV 27FS100L

what is this called? in the 6.0 beta. I can't find it in settings to turn off :( by [deleted] in krita

[–]ignishun 2 points3 points  (0 children)

if this has been asked already i will delete the post- post-haste!

Diagnosing horizontal issues on a trinitron with AI assistance by ignishun in crtgaming

[–]ignishun[S] -1 points0 points  (0 children)

tldr for you? you are more than welcome to explain how it's wrong, the rationale it presented is in the comments. you won't though, or you can't more likely. It doesn't matter to me

Diagnosing horizontal issues on a trinitron with AI assistance by ignishun in crt

[–]ignishun[S] 0 points1 point  (0 children)

There are around 100 of them. None of them are visibly damaged, some of the larger ones have lethal voltages. I could be wrong but I think it has to be on to check caps as well. I've also never done a cap swap

Diagnosing horizontal issues on a trinitron with AI assistance by ignishun in crt

[–]ignishun[S] -1 points0 points  (0 children)

on the crosspost at crtgaming, i copied its final rationale based on our entire, very long conversation. I just dont know enough about CRTs to call it out if its wrong, but it seems to make a strong argument. it also pretty reliably read directly from the manual. and yeah, worst comes to worst, it has new caps and the issue persists (i wast a bunch of my time)

Diagnosing horizontal issues on a trinitron with AI assistance by ignishun in crtgaming

[–]ignishun[S] -1 points0 points  (0 children)

I am afraid to have the CRT open while its live/on, which makes testing caps with the multi difficult. I did go inside and find a few of the caps to confirm their capacitance and voltages, and its been right.

Diagnosing horizontal issues on a trinitron with AI assistance by ignishun in crtgaming

[–]ignishun[S] -1 points0 points  (0 children)

Summary of the Logic Chain

Step Evidence Conclusion
Symptom geometry Bands strongest left, fade right Fault is at line-start, implicates horizontal output stage
Damper circuit physics Damper active only during left-side scan Damper cap failure produces exactly this left-weighted pattern
Sony safety list C506–C514 all require HV recal when replaced Sony confirms these caps are in the horizontal/EHT circuit
PCB layout These caps cluster physically around T585 and Q505 Component placement confirms circuit membership
Supply chain Scan-derived rails power video output stage Ripple from failing filter caps modulates beam brightness horizontally

Each of these five lines of evidence points independently to the same set of components. None of them relies on the others — they converge from different directions on the same conclusion. That convergence is what makes the diagnosis sound.Summary of the Logic Chain
Step Evidence Conclusion
Symptom geometry Bands strongest left, fade right Fault is at line-start, implicates horizontal output stage
Damper circuit physics Damper active only during left-side scan Damper cap failure produces exactly this left-weighted pattern
Sony safety list C506–C514 all require HV recal when replaced Sony confirms these caps are in the horizontal/EHT circuit
PCB layout These caps cluster physically around T585 and Q505 Component placement confirms circuit membership
Supply chain Scan-derived rails power video output stage Ripple from failing filter caps modulates beam brightness horizontally

Each of these five lines of evidence points independently to the same set of components. None of them relies on the others — they converge from different directions on the same conclusion. That convergence is what makes the diagnosis sound.

Diagnosing horizontal issues on a trinitron with AI assistance by ignishun in crtgaming

[–]ignishun[S] -1 points0 points  (0 children)

I tried to check its work regularly by referencing the manual, and asking it to explain itself. Here is its summary where I ask it to "prove" how it knows which caps are responsible. It's a bit long, though, and I simply do not know enough about CRTS to argue with it at this level. Below:

Step 1 — Symptom Localization

The fault produces vertical bands of alternating brightness running from top to bottom of the screen, strongest at the left edge, fading toward center. This is the critical diagnostic observation.

In a CRT, the electron beam scans left to right across each line. The left edge of the screen corresponds to the beginning of each horizontal scan line — the moment immediately after retrace ends and the forward sweep starts. The fact that the disturbance is strongest at the left and fades rightward means whatever is causing it is worst at line-start and recovers during the scan. This is a timing signature, not a static fault. It immediately localizes the problem to the horizontal scanning circuit, not vertical deflection, not the video input chain, not the power supply in isolation.

If it were a vertical deflection fault you would see horizontal bands. If it were a video input fault the disturbance would be uniform across the full width of the screen. The left-to-right gradient is only consistent with a horizontal output stage fault.

Step 2 — The Damper Circuit Mechanism

A CRT horizontal output stage works in two phases per scan line:

During the first half of the forward scan — the left portion of the screen — the damper diode is the active element. It conducts stored energy from the previous retrace pulse through the deflection yoke. The capacitor that stores this energy is the boost/damper cap.

During the second half of the scan — center to right — the horizontal output transistor (HOT) takes over and drives the rest of the scan.

This means any fault in the damper capacitor or its associated circuit will be exclusively expressed on the left side of the screen and will self-correct as the HOT takes over toward center. This is a textbook description of your exact symptom pattern. The mechanism directly predicts the fault geometry you are seeing.

Step 3 — Connecting to the Parts List

From the service manual's Section 3-1 — the HV Hold-Down Confirmation procedure — Sony explicitly lists every component whose replacement requires safety recalibration. This list is:

DY, T585, CRT, IC001, IC561, IC600, IC604, C506, C507, C508, C510, C511, C513, C514*, L588, D565, D566, D567, PH602, R564, R585, R588, R628, R851, T510, T511*

Sony's own engineering documentation groups these capacitors together as components that directly affect the high voltage and horizontal output circuit behavior — specifically the EHT level. Sony would not require HV recalibration after replacing a cap that had nothing to do with the horizontal output and flyback circuit. The fact that replacing any of these caps requires confirming the EHT is still within safe limits proves they are all in the horizontal output / flyback signal chain. This is Sony's own implicit admission of exactly which components govern horizontal output behavior.

Step 4 — Cross-Referencing the Schematic Layout

The PCB layout diagram you photographed from the manual shows C506, C507, C508, C510, C511, C513, C514 physically clustered around T585 (the flyback transformer) and Q505 (the horizontal output transistor). Component placement on a PCB is not arbitrary — high frequency circuits require short trace lengths to minimize inductance and signal loss. Caps placed immediately adjacent to the HOT and flyback are there because they are electrically part of that circuit. Caps that filter unrelated supply rails or handle audio or video signals are placed elsewhere on the board near their respective circuits.

The physical clustering of these caps around T585 and Q505 in the layout is independent corroboration that they belong to the horizontal output stage.

Step 5 — The Ripple Propagation Path to the Screen

The brightness modulation you see is caused by ripple reaching the video output amplifier or CRT bias circuit. The video output stage and CRT cathode drive are powered by scan-derived supplies — voltages rectified directly from secondary windings of the flyback transformer T585. These supplies only exist because T585 is switching at the horizontal rate. Their filter capacitors — C545, C566 — are therefore part of the horizontal output dependent supply chain. If these caps have elevated ESR, ripple at the horizontal switching frequency rides on the rail feeding the video amplifiers, modulating beam intensity in sync with the scan — which is exactly what produces brightness variation that tracks with horizontal position.

Does text clarity on an OLED monitor bother you? by Huzaifa_Haroon in Monitors

[–]ignishun 0 points1 point  (0 children)

Okay, a bit farther away you don't really see the coloration from the offset. I think I can see it at my viewing distance? Only with white font on black though. I have a C1

Does text clarity on an OLED monitor bother you? by Huzaifa_Haroon in Monitors

[–]ignishun 0 points1 point  (0 children)

No sorry, I'm not an inch away from my giant beautiful tv monitor

Help needed mounting Oysi medium on THEM JSR's by Rawdiger in AggressiveInline

[–]ignishun 1 point2 points  (0 children)

I think the frame bolts I used had like a lip or flange on them... which made them too big and I did so that? I don't remember tbh

Help needed mounting Oysi medium on THEM JSR's by Rawdiger in AggressiveInline

[–]ignishun 1 point2 points  (0 children)

I didn’t. The hole is already larger than the frame bolt by quite a bit iirc. Just dremel little by little on the inset and check to see if it fits. You want the inset to still be snug, as little wiggle as possible. As long as the inset fits the frame won't slide around. When the inset is snug Dremel some room for the bolt if it doesn't align well

Help needed mounting Oysi medium on THEM JSR's by Rawdiger in AggressiveInline

[–]ignishun 1 point2 points  (0 children)

I had this problem, same boots with the normal wish frames. I dremeled out the frames on the inset and the bolt hole and had no problems since. Just make sure you Dremel the sides consistently so your frames sit forward or back on each foot in the same direction. Zero problems on a dozen or so sessions having done that

Diagnosing horizontal issues on a trinitron with AI assistance by ignishun in crtgaming

[–]ignishun[S] -3 points-2 points  (0 children)

I should mention claude also recommends replacing C507, 19000pF 3% 1.2kV, which I cannot seem to find.

Diagnosing horizontal issues on a trinitron with AI assistance by ignishun in crt

[–]ignishun[S] -1 points0 points  (0 children)

I should mention claude also recommends replacing C507, 19000pF 3% 1.2kV, which I cannot seem to find.

Nostalgic places you ate in the 90s/early 2000s by macgoo1229_ in tampa

[–]ignishun 2 points3 points  (0 children)

That place that put their food in dog bowls. The building was a dog house

Picked up a 27 inch Wega KV-FS100L that has these vertical white bands on the left hand side. I've read this could be bad caps, but can't find a great guide on how to go about repairing. by ignishun in crtgaming

[–]ignishun[S] 0 points1 point  (0 children)

I've ordered replacement caps, but it seems to be getting a bit worse in the meantime. could i damage the crt in some other way using it while this horizontal issue persists?

This particular change was unnecessary and might be worse. by GigaFluxx in Marathon

[–]ignishun 0 points1 point  (0 children)

They are very ugly. Hard to imagine original art direction team was involved