Philips SPENDEX 40 Maintenance Manual page 59

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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
- Demount the cradle as described in § 7.3.6;
- Demount the upper cover as described in § 7.3.7;
- Pull the key memory board loose from connector X7 of the mother
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b o a r d a n d t a k e t h e b o a r d o u t o f t h e h o u s i n g .
7.3.11 Demounting of the key generator board
The key generator board and the controller board make up an assembly.
The whole is mounted in the red compartment of the housing on
p o s i t i o n 4 / 5 .
- Demount the cradle as described in § 7.3.6;
I - D e m o u n t t h e u p p e r c o v e r a s d e s c r i b e d i n § 7 . 3 . 7 ;
- Pull the key generator board/controller board assembly loose from
the connectors X9 and Xll of the mother board and take the whole
out of the housing;
- Loosen the 5 M3 socket head screws, with which the key generator
board is fixed. Use for this purpose a round head screwdriver, size
2.5;
■ * - R e m o v e t h e s o c k e t h e a d s c r e w s , i n c l u d i n g t h e p l a i n w a s h e r s a n d t h e
retaining Belleville washers;
- Take away the key generator board.
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7 . 3 . 1 2 D e m o u n t i n g o f t h e c o n t r o l l e r b o a r d
The controller board and the key generator board make up an assembly.
The whole is mounted in the red compartment of the housing on
p o s i t i o n 4 / 5 .
- Demount the cradle as described in § 7.3.6;
- Demount the upper cover as described in § 7.3.7;
- Pull the key generator board/controller board assembly loose from
the connectors X9 and Xll of the mother board and take the whole
out of the housing;
- Loosen the 5 M3 socket head screws, with which the controller 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 controller board.
7.3.13 Demounting of the timing board
The timing board and the telephony board make up an assembly. The
whole is mounted in the red compartment of the housing on position
6 / 7 .
- Demount the cradle as described in § 7.3.6;
- Demount the upper cover as described in § 7.3.7;
- Pull the timing board/telephony board assembly loose from the
connectors X13 and X15 of the mother board and take the whole out
9 9 2 2 1 5 4 1 3 4 3 1 7 - 5
NATO CONFIDENTIAL