O D U L A R S E T - U P; M A I N A S S E M B L Y - Philips SPENDEX 40 Maintenance Manual

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NATO CONFIDENTIAL
S P E N D E X 4 0 U A 8 2 5 1 / 0 0 A N D / O l L I M I T E D M A I N T E N A N C E M A N U A L
3 M O D U L A R S E T- U P ( s e e F i g . 3 . 1 )
3 . 1 M a i n a s s e m b l y
3 . 1 . 1 F r o n t p a n e l U A 8 3 1 2 / 0 0
The front panel contains:
- the handset connector
- the data connector
- the fill-gun connector
- the CIK-connector
- the ZEROISE push button
- the SECURE push button
- the keyboard
Furthermore the front panel is provided with 3 filter plates:
- a filter plate (display, keyboard), consisting of the display and
keyboard panel with display, LED and feed-through filters for the
signals from and to the keyboard interface, the display interface
and the LED;
- a filter plate (switches) with feed-through filters for the signals
from and to the ZEROISE push button and the SECURE push button;
- a filter plate (handset, data, CIK, fill-gun) with feed-through
filters for the signals from and to the handset, a Data Terminal
Equipment, the CIK-module and a key variable loading device.
3 . 1 . 2 H o u s i n g U A 8 3 1 1 / 0 0
The housing consists of 3 compartments:
- the red compartment
- the line interface compartment
- the power supply compartment
On the bottom of the red compartment the mother board has been
mounted. This mother board is fitted with connectors for the
connection of the connecting board, the synthesis board, the analysis
board, the key memory board, the key generator board, the controller
board, the timing board and the telephony board.
The line interface compartment accommodates the modem and the line
interface board.
The power supply unit is in the power supply compartment.
The housing has 3 filter plates:
- a filter plate (modem/pr.mod.) with feed-through filters for the
signals from the mother board to the line interface board and for
the signals from the line interface board to the mother board;
- a filter plate (power supply/pr.mod.) with feed-through filters for
the power supply voltages to the mother board;
- a filter plate (power supply/modem) with feed-through filters for
the power supply voltages to the line interface board.
9 9 2 2 1 5 4 1 3 4 3 1 3 - 1
NATO CONFIDENTIAL