Toshiba CF27E55

SegaSaturn94
January 16, 2026, 10:29 pm
January 17, 2026, 4:53 am

Summary

Midrange 27" CRT by Toshiba, made in the USA in 1995. Has RF, composite, and s-video inputs with stereo sound.

(Special thanks to Justin Hooks for the pics!)

Manuals

Notes

Set can be modded for RGB via the OSD mux method. However, with the provided example, the RGB signal had bad image jitter and permanently disabled the other inputs. If you do plan to RGB mod this set and can figure out how to not get the jitter issues and disabling the inputs, then go for it. (The gameplay pics following the internal shots are of the RGB mod.)

RGB Mod

Written by SegaSaturn94

The OSD mux method uses Sunthar's color coding convention wired to a SCART connector:

  1. The resistors in-line of the RGB, sync and blanking signals below and their values. You must calculate what resistors to put on the SCART board using Mark OZLAD's mux calculator. (You can also get sync from the composite signal if you so choose.)

  1. Below is how to wire the audio circuit.

  1. The IC located at QA01 is the OSD chip, model TMP87CM34AN. Tap the RGB lines inbound to that chip to inject your RGB signal.

  1. Recommended location of the SCART connector:

Gallery

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