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March 1963 Radio-Electronics
 [Table of Contents]
Wax nostalgic about and learn from the history of early electronics.
See articles from Radio-Electronics,
published 1930-1988. All copyrights hereby acknowledged.
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Since first beginning in
1946, Howard W. Sams
PhotoFacts were the de facto standard for technical documentation on radio,
television, phonograph, magnetic tape machines, and other forms of electronic entertainment.
Other companies such as Colorgrams, a division of TV Development Corporation, introduced
competitive products which appear to be of high quality, but Sams' documentation
packages ruled the repair shop roost. A sample of a TV Colorgram datasheet can be
seen in this two-page spread in a 1963 issue of Radio-Electronics magazine.
A few
Colorgrams packages can be found occasionally on eBay, but the number pales
in comparison to
Sams FotoFacts. Although nowhere near as comprehensive as the commercially published
documentation packages, the electronics trade magazines often published at least
schematics and parts lists of various products. At the time, manufacturers only
made that information available to authorized dealers and service shops.
New TV Colorgrams
 New TV Colorgrams - amazing color-coded
system pinpoints hard-to-find components, conductors
• Individual Colorgram Charts highlight specific TV receiver functions
• Rapid Repair Manual
• Color-Keyed master Schematic
• all based on original TV manufacturers' data
Complete colorgrams Service-Pak only $1.95
Designed By Leading Authorities
Paul B. Zbar, head of electronic dept. Voorhees Technical Institute, and Robert
Cornell, former technical editor of Electronic Technician Magazine.
Colorgram Charts (see sample on left hand page) are the key to a remarkable new
method designed to help you isolate TV receiver difficulties in less time and with
less effort than has ever before been possible. The Colorgram system simplifies
the use of any repair procedure you normally use.
Each Colorgram Chart Shows Separate Circuit Sections
Each Colorgram Chart is clearly color-coded to show signal-flow and continuity
as distinctly as the color-marked route on a road map. Each Colorgram Chart shows
test points and voltages. The entire ground conductor is shown in its own distinctive
color throughout all the Colorgram Charts. Every component in the circuit is clearly
identified, and its relationship to other components made readily recognizable.
There is a Colorgram Chart (like the sample shown) for each of these TV receiver
functions: IF, Video, Audio, Vertical and Horizontal, (showing sync and sweep circuits),
B+ distribution and AGC circuitry.
Colorgrams Isolate Trouble Areas
Each Colorgram Chart enables you to color-shoot with little or no reference to
schematic or manual. If you have a video problem, refer to the Video Colorgram Chart
- audio problem, the Audio Colorgram. The circuit is conveniently color-coded, localized
and isolated. Even when a signal leaves the board and then returns, components and
signal path are clearly indicated. You can concentrate on that small portion of
the set most likely to be the cause of trouble. There's no time wasted working back
and forth between schematic and set looking for test points -wading thru superfluous
information-identifying components incorrectly.
Speed Printed Circuit Servicing
Where receivers use printed circuits, each Colorgram Chart represents the actual
signal conductor pattern of the specific PC board, exactly as you see it in the
set. Color-coding helps you easily concentrate on the signal flow of interest. And
each component is clearly located and identified.
Color-Keyed Master Schematic Identifies Colorgram Chart Areas
Easy-to-read schematic, provides an overall view of the receiver circuit. Shows
the Tuner, IF, Video, Audio, Vertical and Horizontal sections, color-keyed to the
colors used in individual Colorgram Charts. Also includes test points, waveforms,
voltage, resistance, capacitance, practical alignment data, etc.
Rapid-Repair manual Contains Practical Service Data
This effective guide to the use of the Colorgram System contains original manufacturer's
service notes, special instructions, circuit modifications, parts list and parts
numbers. Includes Pictorial Tube and Component Location Charts, Tube Failure Guide.
Colorgrams can help you with your TV repair problems - Act Today!
Now Available
TV Colorgram Service Paks For:
• RCA • General Electric • Motorola • Admiral • Emerson •
Philco • Westinghouse • Magnavox. Other popular makes and circuits to
be announced soon.
get the Colorgram story use this coupon
Colorgrams*Inc.
Division of TV Development Corp.
469 Jerico Turnpike
Mineola, New York
Dept. RE-3 Please send me:
( ) Free cross-referenced Colorgram catalog.
( ) Name of nearest Colorgram distributors
Name _______________________________________
(please print)
Company ________________________________________________________________________
City ____________________________________ Zone _____ State ______________________
Please fill in this information. My occupation is:
( ) TV technician ( ) Engineer ( ) Hobbyist ( ) Other
___________ (please specify)
Posted May 9, 2023
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