AM 334-01-502
9
C. SCHEMATIC DIAGRAM
In this chapter you will find detailed schematic diagrams,
principles of operation and useful notes on adjustments and
tests. To help you find the desired information easier, the
schematics are grouped as follows:
I. Central Electronics
II. Control Panels
Ill. Peripheral Boards
I. Central Electronics
This section includes the pin layout of the backplane board
MB 30, detailed schematic diagrams of all the plug-in boards
which mate with MB 30 and component layout diagrams
with functional cal louts.
1. Backplane Board MB 30
This PC board has three basic functions:
- It is a mechanical support for all the plugin boards
- It connects the boards together electrically
- It carries all the connectors for wiring the
peripheral boards via ribbon cables
The accompanying table shows the pin layout of the edge
connectors on the MB 30; these are the access points to the
plug-in boards. The diagram shows the layout of the ribbon
cable edge connectors on MB 30; these are the access points
to the "outside world."
Testing or troubleshooting a plug-in board is made
easier by plugging the board into the extender board
EXT 1 and - important - then inserting the EXT 1 in
the correct slot for the board being tested. Except for
the five slave boards, which can be interchanged in
their designated slots, no plug-in board must ever by
plugged into any slot other than that designated for it.
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