Electrohome ECP Series

      >> Introduction 
      >> Layout and Setup Tips 
      >> Manuals / Downloads 

Waveform board

As the title implies, the convergence waveform board generates the waveforms for the convergence board. I will be posted a separate tech tips section that describes how to tweak the trimpots on the front of this board, again under normal circumstances it’s not required to turn these pots. The pincushion board is stacked as a daughterboard on the main board as shown above on some versions of this board. Some do not have this daughterboard.. It’s common for the module contacts to go intermittent. The remedy is simple, take off the daughterboard and insert it back onto the motherboard several times. This cleans the contacts, and you’re good to go for another few years.

ACON board

This board was an option on all models that ended in ‘00’, and was standard equipment on the models ending in ‘01’. Of course, some ACON cameras were added after the fact and some were removed. The ACON consists of three parts: The PC board installed into the rear of the set, the camera on the front, and the 25 pin cable that plugs into the camera and snakes to the motherboard.

The ACON camera assists in the setup and convergence of the unit. When the ACON is installed and working properly, it will align the R and B tubes to the green grid that you need to set up manually. It’s fun to watch, but you can always do a better job manually. When the ACON is installed, the ACON option will come up in the convergence menu. Select it, and the ACON will do it’s job.

The ACON PC board is fairly reliable, but the mechanical servo controlled camera had it’s issues. Most often, the camera got hit physically and sustained damage to the servos. Over time, the optics of the camera became dirty, and would show error messages. The optics are cheap and dirty in these ACON units, and it’s not difficult to pull the camera open to clean them. Note that the ACON must be operated in complete darkness for the best results, any ambient light will throw the camera off.