Electrohome ECP Series
The Electrohome ECP series has been a very popular 7” ES focusing set. It’s
easy to set up, relatively reliable and shows a good image. I've sold hundreds
of these over the years with excellent results.
There were several
models and generations of ECP projectors. The first model unrelated to the other
ECP series was the ECP 2000. It came out circa 1984 and had a unique prism setup
internally to the projector so that all three CRT’s projected out of one lens.
This model is now considered obsolete and will not be covered in this website.
The second generation was the ECP 3000 and 4000 models. The only difference
between the 3XXX and 4XXX series was that the 3XXX series scanned to 55 Khz, the
4XXX series scanned to 80 Khz. Minor circuit changes occurred between the two
models, but the board layout and setup was identical. These were made from 1988
to 1991. The 3000 and 4000 used Sony SD-187 tubes, the same found in a
number of Sony and Barco sets. 7" ES focus tubes. Both have digital convergence
and were relatively easy to set up. Many of the components were on PC board
modules, making field service simple. The ECP series is taller than most
projectors, making ceiling installation difficult if the room does not have a
lot of height to it.
The next generation of ECP were the 2100, 3100 and 4100 series. The 2100 was
a budget model, and had the wired setup remote deleted from the back of the set.
A wireless remote was therefore mandatory for the operation of the 2100. The
3100 and 4100 had the wired setup remote included, and the scanning differences
were the only changes between the two models. These sets improved on the
convergence software, and other PC board changes were made, Some boards are
interchangeable throughout the ECP line, others are model specific. These were made from 1991 to 1994.
The last version of the ECP series was the 2500, 3500 and 4500. The
differences were as with the 2100, 3100 and 4100 above, but also included a
newer and improved focus block that eliminated the problem of drifting focus
with the earlier models (although it is a simple task to repair and modify the
older boards) and this new series used the brighter 750 lumen Sony 07MS
tubes as compared to the other models that used the 600 lumen Sony SD 187 tubes.
Note that some of the late model ECP 3100 and 4100 models did come with the
later version tubes and focus block as well. These were made from 1994-early
1997. These sets are still very popular and command a good resale value on the
These ECP projectors also were made by Electrohome for Vidikron. Vidikron
replaced the utility looking cases with fancier and sleek looking cases, and
charged a decent surcharge for this case. I know of no other circuit changes
that were made by or for the Vidikron versions of the ECP sets.
To see how the ECP series ranks in relation to other projectors for use in a
home theater environment see the
For full specifications on these and other projectors, see the
For an overview and history of Electrohome see the CRT
See the Advanced Procedures
page for various DIY instructions on maintaining and improving CRT projectors.
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