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Electrohome ECP 4501

Video Projector


This is one of the finest video projectors available.  This is a professional CRT projector. It has far better performance than LCD or DLP projectors.  It is amazingly bright, and is ideal for home theater or graphics projection.  It is fully HDTV compatible and accepts multiple aspect ratios.

Our unit was produced in 1996 and is tested and functional.  The ACOM worked perfectly, and the projector produced a bright crisp image.

The ACOM automatically sets the convergence eliminating time consuming manual setup and touch-up.  Believe me you will really appreciate this feature when you donít have to climb the ladder to adjust the convergence on your projector.

It is good cosmetic condition, and includes both the wired and wireless remote controls. This unit is being sold as is, so please bid accordingly.

This unit is very large and heavy, over 100 pounds. The buyer pays for all shipping expenses, which may be significant. No exceptions.  



*High definition F1.0 hybrid lens center and edge focusing



* Maximum resolution 1024 x 1280 pixels. 1000 vertical lines


Brightness Maximum

* 650 lumens peak light output * 370 foot lamberts on a 6' diagonal 10 gain screen total light output

Focused Data

* 480 lumens peak light output * 280 foot lamberts on a 6' diagonal 10 gain screen total light output



* Functional 3 lens design allows simple adjustment for flat, curved or rear screens from 5 to 25 feet diagonal * Electronic pincushion circuits separately correct top, bottom and sides for flat, curved, or rear screen applications * Keystone circuitry to correct pictures for angles up to t 15 degrees vertically from screen axis



Video Circuits

Input * Input level 0.5 to 2.0 volts p-p, 75ohms g 1% terminated

* Automatically switches to separate sync or sync on green  Separate sync is automatically accepted in either polarity


Frequency Response

* 70MHz bandwidth +-3dB * Linear non-differential amplifier accommodates 8 nanosecond pixels and digital clock rates over 130MHz


D.C. Restoration

* Keyed clamp Gain * Minimum video gain 40dB or 100X * Maximum video output 130 volts p-p-drive





Deflection Circuits

Vertical Deflection

* Size: automatically regulated over frequency range and adjustable from 20% underscan to 10% overscan * Frequency Range: automatically locks from 45 Hz to 120 Hz * fast Retract 300 ms


Horizontal Deflection

* Size: automatically regulated over frequency range and adjustable to 10% overscan 10% underscan * Frequency Range: automatically locks from 15KHz to 80KHz * under 2.5 ms retrace.

High Voltage

* 34.0Kv regulated to better than 1%


Power Requirements

* 90 VAC to 132 VAC can be externally reconnected for 180 VAC to 264 VAC * Line frequency 50 to 60Hz nominal * Power 450 watts maximum





Operating and Service Controls

Infrared Remote Control

* Power * Converge

* Contrast * Pincushion

* Brightness * Bow

* Color * Size

* Tint * Focus

* Detail * Keystnne

* Volume * Move

* Mute * Vert. Blank

* Standby * Horiz. Hold

* Reset * Vert. Hold

* Recall * Fast/Slow Sync

* Help * Projector k

* Source # * Exit

* Optional remote control receiver can be connected to projector for rear screen applications

* On screen display prompting assists set-up with step-by-step alphanumeric instructions and graphic focus aids


Service Controls

(Screwdriver Adjust)

* RGB Drive Levels * RGB Screen Controls * RGB Cut-Off Switches * RGB Electrical Focus * Vertical Linearity


* Power On * Ready * Error * Vertical Hold Manual * Horizontal Hold Manual * Vertical Scan Fail * Horizontal Scan Fail Environment





Unit comes with 1 input module allowing 2 RGB sources to be connected and Quad Standard Decoder module.


Optional Source Selection

The Electrohome IR Remote Video/Data Switcher allows use of 6 additional input modules for master control of projector.


Maximum Operating Range

* Temperature: 0 to 35 degrees C * Humidity: 0 to 90% non-condensing * Altitude: 0 to 3000m (0-10,000 ft.)



* Temperature -30C to 65 degrees C



* The ECF" 3000 can be ceiling mounted on its optional ceiling mount or on a castered cart for portable applications.



* 99lb. * Shipping Weight 120 lb./54.4 kg

Due to constant research, specifications are subject to change without notice. ECP is a registered trademark of Electrohome Limited.









As our many customers will attest, we will do our very best to resolve any customer problems.  But our official policy is: 

  • All items sold are guaranteed against D.O.A. only. 
  • All claims must be made within 3 days of receipt. 
  • All warranties are void if the calibration / warranty seals are broken.



Shipping Policy

Buyer will pay $75.00 packing plus actual shipping in the continental United States.  We will make every effort to ship within 24 hours of receipt of payment.  We ship with FedEx & UPS only.  We will be glad to ship with other carriers using the purchasers shipping account.  Please contact us to make any special shipping arrangements. For shipping rate research, our shipping address is Boulder, CO USA ---- Zip Code is 80305.

Foreign buyers:  Unless special provisions have been made, you are responsible for making your own shipping arrangements and all costs related to customs, duties & special packaging requirements.  Please do not ask us to quote you international shipping rates.  Use the address information above to research you own shipping rates.  You can email waltwhite@ascentconcepts.com to get the packaging fee, package weight and size for your research.  Items sold outside the USA are sold as is.  



 Payment Policy

We accept Credit Card payment through Paypal.   We accept Cashiers Check or Money Orders.



Ascent Concepts and Technologies is a Research & Development Lab.  As a service to the companies and institutions we work with, we broker their excess equipment & act as application specialists on their new equipment needs.  We are now offering quality used equipment to the public with the same level of professionalism and service.   Please feel free to email at thomasknox@ascentconcepts.com or call Thomas @ 1-303-554-0307 with any Technical questions.  Please feel free to email at waltwhite@ascentconcepts.com or call Walt @ 1-720-276-8288 with any Shipping or Logistical questions. We make every effort to evaluate and guarantee our equipment.  Although we do not provide NIST traceable calibration, we do have extensive in house calibration equipment and make every effort to test and verify performance on equipment we sell.  However we do not warranty any items shipped outside the United States. 

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The equipment shown is a representation only.  We often have multiple units in stock so please email us with your needs.  We have a large inventory and can usually find any test and measurement item in a short time frame.------Inquires info@ascentconcept.com