So here’s how I modded my Toshiba 27a43
Micon: OEC7074A
Jungle: TB1253AN
Found service manual here:
https://elektrotanya.com/toshiba_27a43c.pdf/download.html#dlWhen you’re pulling the main board out of this set it can kinda seem fused in there, I ended up using a long Philips driver to undo the back of the buttons just to free everything up, there’s really only a clip in the centre and once you get it apart it pops in and out nicely. Was baffled for a bit.
I pulled a female vga socket out of a dead monitor and wired to the pins 1-R, 2-G, 3-B, 10-Ground (soldered a lead right across #6-10 maybe unnecessarily), 13-H, 14-V sync.
I used the components I had around instead of following the RGB Mux guide from the SHMUPS guys.
VGA Red -> 75R (terminated to ground ) -> 75R -> 1uF cap -> W127 (same circuit for R,G&B)
W127 is a jumper that runs in the path between pin 34 on the Micom and pin 20 on the jungle (OSD red input)
W125 is green
W124 is blue
Pulled 5v from the RF input tuner. BPL goes to a cap C002, where I soldered onto the tuner side leg, ran to the blanking pin#19 on the jungle, the nearby R615 was a nice spot to tap in.
I combined my H&V sync -> 75R terminated to ground -> composite #1 Y input. (Tried Luma on svideo with no luck)
Put it all on a switch. The osd is sort of useable, just very faint unless I hit the switch and turn off blanking, would probably be easier to read if I had followed the mux instructions properly.
Works very well, offset to the right is all but I’m researching that problem still.
Now to work on a frame and vertical mounting...