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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
CONTENTS
Page
C o n t e n t s i
L i s t o f fi g u r e s i i
Abbreviations iii
Definitions iii
L i s t o f E f f e c t i v e P a g e s i i i
1 I N T R O D U C T I O N 1 - 1
1 . 1 G e n e r a l 1 - 1
1 . 2 T e c h n i c a l d e s c r i p t i o n 1 - 1
1 . 3 M e c h a n i c a l c o n s t r u c t i o n 1 - 1
2 T E C H N I C A L D A T A 2 - 1
3 M O D U L A R S E T - U P 3 - 1
3 . 1 M a i n a s s e m b l y 3 - 1
3 . 2 A c c e s s o r i e s 3 - 5
4 C I R C U I T D E S C R I P T I O N 4 - 1
4 . 1 H a n d s e t 4 - 1
4 . 2 F r o n t p a n e l 4 - 2
4 . 3 C o n n e c t i n g b o a r d 4 - 3
4 . 4 S y n t h e s i s b o a r d 4 - 5
4 . 5 A n a l y s i s b o a r d 4 - 7
4 . 6 K e y m e m o r y b o a r d 4 - 8
4 . 7 K e y g e n e r a t o r b o a r d 4 - 9
4 . 8 C o n t r o l l e r b o a r d 4 - 1 1
4.9 Timing board 4-12
4.10 Telephony board 4-13
4 . 1 1 V 2 6 / V 2 6 b i s m o d e m 4 - 1 4
4 . 1 2 V 2 2 b i s m o d e m 4 - 1 4
4.13 Line interface board 4-15
4.14 Cradle/upper cover 4-17
4 . 1 5 M a i n s / l i n e fi l t e r 4 - 1 7
4.16 Power supply unit 4-17
5 H A R D W A R E S E T T I N G S 5 - 1
6 F A U L T F I N D I N G A N D R E P A I R P R O C E D U R E 6 - 1
6 . 1 G e n e r a l 6 - 1
6 . 2 S e l f - t e s t 6 - 2
6 . 3 S e t - u p t e s t 6 - 6
6 . 3 . 1 T e s t s t a r t p r o c e d u r e 6 - 6
6 . 3 . 2 K e y b o a r d / d i s p l a y t e s t 6 - 7
6 . 3 . 3 S w i t c h t e s t 6 - 9
6 . 3 . 4 M e m o r y t e s t 6 - 1 0
6 . 3 . 5 M o d e m t e s t 6 - 1 1
6 . 3 . 6 V o c o d e r t e s t 6 - 1 2
6 . 3 . 7 T i m e r t e s t 6 - 1 3
6 . 3 . 8 S y s t e m t e s t 6 - 1 4
9922 154 13431 NATO CONFIDENTIAL
