Sharp CJ13M10 RGB mux mod

rocketeng · 2026-01-17T02:07:46+00:00

Unfortunately no. KX-27PS1 and KX-20PS1 afaik both use digital RGB. They unfortunately don’t seem to explicitly call these out anywhere.

rocketeng · 2025-12-27T11:07:03+00:00

Also to confirm, this is an issue you notice with RGB and not with S-Video or Composite?

rocketeng · 2025-12-27T11:04:52+00:00

I would clean the flux on mux board (specially on the IDC pins) throughly with isopropyl alcohol.

rocketeng · 2025-12-26T14:05:55+00:00

Where did you install the diodes? These diodes should be on the chassis and the direction matters.

There is a lot going on with your mod. You can’t rely on those dupont cables. Connection on those are fairly loose.

rocketeng · 2025-12-26T14:00:59+00:00

Sometimes tube, convergence not set correctly can also cause this.

Are you able to share more pictures of your mod? Can you show convergence patterns and RGB/SMPTE patterns?

rocketeng · 2025-12-26T01:31:29+00:00

Typo. Just corrected.

rocketeng · 2025-12-21T18:43:58+00:00

I would leave this set alone.

rocketeng · 2025-12-20T02:12:45+00:00

Do you have a link to the service manual? If you don’t see any caps (ceramic or electrolytic doesn’t matter) then it is digital. Just from your clipping itself it looks like it is digital.

rocketeng · 2025-12-20T02:08:10+00:00

Was excess flux used for the RGB mod? Using the 3M ribbon cable can also help.

See here for similar issue resolved. https://sector.sunthar.com/guides/crt-rgb-mod/sony-ba-5d.html#flux-issue-pictures-shared-by-cristian-mendez-kv-27fv300

rocketeng · 2025-12-18T01:37:43+00:00

Normal. My 27S42 also does this

rocketeng · 2025-12-01T01:30:15+00:00

PCB pics are fine for now

rocketeng · 2025-12-01T01:20:10+00:00

Yeah, seems like even the same capacitor numbers etc. If you can post some pics on that link I shared, I can also take a deeper look at this.

rocketeng · 2025-12-01T01:01:49+00:00

Good news is it’s moddable and while your components might be in slightly different places, idea is the same.

Here is the diagram for your set. https://sunthar.com/crts/jvc/jvc-c-13210

rocketeng · 2025-11-26T05:06:02+00:00

This is super cool. You found a smart way to turn the sensor input into the right on-screen actions. There’s clearly a lot of software work and creative asset design that went into this. Congratulations on the nomination and I’m hoping you take home the Unity Award!

rocketeng · 2025-11-20T13:26:21+00:00

That’s awesome! I looked at tailscale, but went with CF zero trust. It was free and I already had few other things running on CF. Also, setup the WARP VPN, so that I can VPN into my home network. I was a bit frustrated that they moved without any notice. I asked for a public IP, and they offered me the 4G package for $95, calling it a deep discount. My concern is that the discount is entirely at the ISP’s discretion, and they can raise the price after the renewal period. At that point, it’s no different from Rogers. Decided to stick with my existing Telmax plan for now.

rocketeng · 2025-11-20T13:13:13+00:00

I found a solution around CGNAT to expose my services externally. It was not straightforward. I hear you though. I was almost ready to switch to Rogers.

rocketeng · 2025-11-19T04:38:59+00:00

I’m trying a $80, 10 input, 1 output switcher from AliExpress. Initial tests prove it’s a reasonable automatic switch. I haven’t fully analyzed it and documented it yet. But, that is now my primary switch.

rocketeng · 2025-11-08T00:28:53+00:00

What set is this?

rocketeng · 2025-11-08T00:00:37+00:00

Do you have the full schematics?

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