User Manual

6
B. SIGNAL CONTROL BOARD (SCB)
The Signal Control Board (SCB) is the "electronic brain" behind the operation of the signal sys-
tem. By taking a few minutes to study the diagram and read the definitions, you will familiar-
ize yourself with the overall operation of the signal system.
SIGNAL CONTROL BOARD (SCB)
SIGNAL CONTROL BOARD (SCB) TIPS
When handling the Signal Control Board (SCB), it is important to fol-
low these simple guidelines to prevent any damage to the control
board.
1. Unplug your power source before attempting to handle the SCB.
2. Touch some type of metal surface. This action helps protect the
SCB from any damage that could be caused by
electrostatic discharge.
3. To avoid generating static electricity, do not walk around the room
until you have completed handling or mounting the SCB.
4. Hold the board by its corners, taking care not to touch the
components on the SCB.
5. Turn off your power supply after every operating session.
5
ABSOLUTE PERMISSIVE BLOCK (APB) signaling works to regulate trains that
oppose, cross or pass each other. The Atlas Model RR Signal System has been
designed to be fully compatible with the APB products offered by Custom Signals,
one of the hobby's premier custom signal producers. Check out the electronics sec-
tion on the Custom Signals website (www.customsignals.com).
This manual reflects both HO and N Scale Track and Signals. Please note that the HO
Scale Signal Control Board (HO #234) is different from the N Scale Signal Control
Board (N #2234). The analog Block Detector Board (BDB) is for both HO and N scale
(#233).
As you can see by the features
included with Atlas Model RR Signal
System, expert knowledge of the
prototype was essential. Many hours
and intense research were put into
the design of the system to achieve
prototype operation in a user-friend-
ly manner. The following individuals
have assisted with this project from
concept to product realization: Gary
Emmich, Steve Horvath and Terry
Christopher.
NOTE: The aspects are in the same
locations on all Type “G” Targets
TYPE “G” SIGNAL
ASPECTS