Cherry Display W424-105B - Seeking Documnetation

[Richard Scales]

I have a Cherry display unit which features a 24 character panaplex display with all required power supply and driving electronics.

I have converted the unit to run on UK Mains (internally configurable) and am now attempting to drive the thing. I have documentation for similar (but different) Cherry displays so am wondering if anyone can point me in the direction of the correct document.

I note that there is an identical unit listed on the bay and it shows the manual though the seller has yet to respond to my cry for help!

The document I do have is for W4XX-1050, 1051 and 1052 series - mine is a 105B model and is different internally.

I include some photos of what I have. 

From the documentation for the other displays I understand that the default config is for a parallel interface though some of them have options for serial operation. I would like to find out if my unit supports serial before I venture too far.

- Richard

[Richard Scales]

Hats off to the vendor who has listed an identical unit on ebay right now - he just sent me pictures of all the pages of the manual, what a gentleman!

- Richard

[Richard Scales]

[Benoit Tourret]

I have a W424-4040, but unfortunately, the more points that are lit up, the noisier it is.
It is around 400 Hz and I couldn't find what what the cause...

Regards,

Benoit.

[Richard Scales]

I have managed to gain full control of the unit and am sending data to it over the parallel interface - which works well.

@Benoit - you may find that the unit is multiplexed at that frequency and the noisy is being generated by the actual display rather than any supporting electronics. If that is the case then perhaps the only solution might be to drive the display with your own electronics where you can control the multiplexing more - that being said - if this is the cause then it might be a bit of a challenge depending on the 'configuration' of the actual display.

 - Richard