Philips SPENDEX 40 Maintenance Manual page 58

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NATO CONFIDENTIAL
SPENDEX 40 UA 8251/00 AND /Ol
LIMITED MAINTENANCE MANUAL
The packing should remain in the housing;
ATTENTION!!
AS SOON AS THE UPPER COVER IS TAKEN FROM THE HOUSING THE
ZEROISE SWITCH ON THE KEY MEMORY BOARD WILL BE OPENED, AS A
RESULT OF WHICH ANY POSSIBLE KEY VARIABLES ARE ZEROISED
IMMEDIATELY.
- Release the connections with the hook switch.
7 . 3 . 8 D e m o u n t i n g o f t h e s y n t h e s i s b o a r d
The synthesis board and the analysis board make up an assembly. The
whole is mounted in the red compartment of the housing on position
1/2.
- Demount the cradle as described in § 7.3.6;
- Demount the upper cover as described in § 7.3.7;
- Pull the synthesis board/analysis board assembly loose from the
connectors X3 and X5 of the mother board and take the whole out of
the housing;
- Loosen the 5 M3 socket head screws, with which the synthesis board
is fixed. Use for this purpose a round head screwdriver, size 2.5;
- Remove the socket head screws, including the plain washers and the
retaining Belleville washers;
- Take away the synthesis board.
7 . 3 . 9 D e m o u n t i n g o f t h e a n a l y s i s b o a r d
The analysis board and the synthesis board make up an assembly. The
whole is mounted in the red compartment of the housing on position
1 / 2 .
- Demount the cradle as described in § 7.3.6;
- Demount the upper cover as described in § 7.3.7;
- Pull the synthesis board/analysis board assembly loose from the
connectors X3 and X5 of the mother board and take the whole out of
the housing;
- Loosen the 5 M3 socket head screws, with which the analysis board
is fixed. Use for this purpose a round head screwdriver, size 2.5;
- Remove the socket head screws, including the plain washers and the
retaining Belleville washers;
- Take away the analysis board.
7.3.10 Demounting of the key memory board
The key memory board is found in the red compartment of the housing
on position 3.
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NATO CONFIDENTIAL