# Feeding Sony Profeel CRTs analog RGB signal
Sony KX-1901/Sony KX-2501 does not support analog RGB, only digital RGB. However, if you have the later revision Sony KX-1901A or Sony KX-2501A CRT, then you are good. "A" at the end of the model # here apparently stands for "Analog" support. Using the RGB Multi to SCART adapter on non-"A" version will not be that useful for retro gaming purposes.
If you feed analog RGB to digital RGB input you might see colors that are flat, missing or corrputed.
# 34P to SCART Adapter ($19US + shipping)
Lead time (1 month). Only have few in inventory.
# Early prototype
I guess you have to start somewhere with these mods. This was my early prototype made with a floppy cable. While it worked, it was really messy.
Someone made this adapter. It's nice to see how they made their's as well. Click the image below to see the imgur post.
# 34 pin connector
Mapping for the 34 pin connector to the floppy connector can be seen below.
# Pin Translation
|TV PIN||Floppy PIN||TV PIN||Floppy PIN|
|Audio (R) Ground||3||30||<||Audio (R) Input||20||29|
|Composite Ground||6||24||<||Composite Output||23||23|
|Audio (L) Ground||7||22||<||Audio (L) Input||24||21||<|
|Red Ground||8||20||<||Red Input||25||19||<|
|Green Ground||9||18||<||Green Input||26||17||<|
|Blue Ground||10||16||<||Blue Input||27||15||<|
|Ground||12||12||Blanking Input (3V)||29||11||<|
|Ground||13||10||<||Composite Sync Input||30||9||<|
|Ground||16||4||RGB Mode Select||33||3|
# Shifting the RGB image
With every RGB mod, I have always noticed a slight shift in the RGB image. KX1901A was no exception. Without the service manual it was a bit tricky to make this adjustment. Lucikly stabarz (opens new window) was kind enough to make a post (opens new window) on what needed to be adjusted on this particular set. I made the recommended adjustment and it just worked fine. My understanding is that this adjustment only applies to this particular set - KX1901A.
Move H.CENT jumper from the "C" position to the "R" position (circled). Getting to this board is not straight forward, so be prepared to go through several screws and wires.
Another easier method to shift the RGB image, is to use an RGB image shifter. I got one of these
5 in 2 out manual SCART switch for ~$70USD and it worked like a charm! There are probably muliple varieties of these RGB shifters on AliExpress that can get the job done.
This is my current setup
Adapter on Sony Profeel KX-1901A