Summary

Launched in 1988, Commodore intended the 1084 to be a universal monitor compatible with all of their computers of the era. In addition to RGB and Composite it accepts S-Video, however the 4-pin DIN connector had not been standardized yet so instead it has two separate RCA inputs for S-Video - one for Luma and one for Chroma. To use this input you can either wire your own adapter or buy one online for cheap. It's referred to as an "S-Video breakout adapter".

The RGB inputs use a commodore standard 8-pin DIN which requires an adapter. If you are up for a DIY project you can also add your own SCART port to the unused port on the back of the monitor for easier RGB plug-and-play (see videos below).

Manuals

• Owner's Manual
• Schematic (PAL 240v version, but good scan)
• Service Manual (terrible quality)

Common Repairs

• Capacitor replacement: Recommend replacing any "taicon" brand capacitors in these monitors as they have a high failure rate.

RGB Mod

The video below covers the mod but is somewhat lengthy. The TL;DW is that you simply need to solder a right-angled SCART port to the empty header on the 1084. Some models of 1084 already have the sound connected on the SCART pins, others do not.

If you don't have sound:

1. For stereo models (ex. 1084S, 1084S-P) simply connect a wire from SCART pin 4 to the L audio's input pin, likewise for the R audio on SCART pin 2.
2. For mono models, you can mux the SCART stereo audio down to mono using two resistors of equal value. The value is not really important, they just need to match. For example two 1K resistors would be fine, or 10K, whatever. Hold the resitors together and twist one pair of their legs together in a spiral, then solder them together. Solder the other ends to SCART Pin 2 and 4, respectively. Run a wire from the tied-together end to the mono audio input pin on the 1084.

If you don't have sync, some early model 1084s are not pre-wired to accept sync from the SCART port. Wiring the sync to the composite input will not work either. The fix is to run a wire from SCART pin 20 to pin 2 of the 6-pin Analog RGB DIN input (labeled horizontal or composite sync on the pinout).

Videos