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Talking to Russ on the phone one day I asked him how did he get
interested in pinballs, he in turn pointed toward his website and suggested
that I read some of the articles - Well! Clearly some of the best advice I
have ever received so I pass it on to you here today :)
There is one area where he reminiscences about being a young engineer and
interested in the Bingo technology, so he wrote the Bally folks for a
schematic to study and got to visit and tour the factory - You gotta love
that.
This man knows coin-ops, pins,
and their history in depth. Mr. Jensen has openly posted and shares many of
his works with us out here on the net and I am very grateful and proud to
share some selected articles with of his here on my pages.
Thank you Russ
Russ wrote me an email one day and pointed out that his "EM
Trouble-shooting Guide" had a lot of good information in it that could
really aid the Bingo owner. As stated: It's clear Mr. Jensen knows the
history of pinballs quite well, along with the players, and the machines.
You can bet, I'll be sending away for one of these books as soon as I can
get to it:
Russ Jensen's PINBALL TROUBLESHOOTING
GUIDE:
The book covers electro-mechanical (E/M) games only.
(The Table of Contents is shown below.) Although many of the example
circuits are patterned after 1950's era games, the theory and detailed
component descriptions cover all eras of EM games. There is some basic
circuit theory, detailed descriptions of pinball components, descriptions of
typical circuit
configurations used in pingames, and detailed descriptions of
troubleshooting procedures using home-made test equipment.
If want further information about the book you can Click here to email
me. Or you can phone me (except Saturdays and Sundays after 8:30 AM Pacific
time, or Weekday mornings before 10AM PST) at 805-482-3875.
If you just want to purchase one, send $20 (or $21 if you want FIRST CLASS
postage) to:
Russ Jensen
1652 Euclid Ave.
Camarillo, CA
93010
CONTENTS
1 Schematic Diagrams
................................................... 1
2 The Power Source
..................................................... 3
3 Relays And Stepping Switches,
Etc..................................... 7
4 Motor Units
......................................................... 13
5 Switches
............................................................ 17
Switch Configurations, 17
Switch Applications, 19
Playfield Switches, 19
Stepping Switches, 19
Switch Maintenance, 21
6 Basic Circuits
...................................................... 23
Switching Circuits, 23
Switch Connections, 23
More Circuit Theory, 25
The Zero Ohms Test, 27
Voltage Drop, 27
Common Power Circuits, 29
7 Circuit Configurations
............................................ 31
Coils In Series, 31
The "Hold On" Circuit, 31
The "Relay Race", 33
A Complex Game Function, 35
8 Troubleshooting Techniques
........................................ 39
Test Light Techniques, 39
Clip Lead Testing, 43
Test Example, 45
Continuity Testing, 45
Wire Tracing, 47
Switch Testing, 47
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