Aeroflex ATC-1400A-2 - Page 9

MAI NTENANCE MANUAL
ATC-1400A-2
2-2-2
Page 9
Subj e c t to E x p o rt Co n t r o l, s e e Cover P a ge f o r d etai l s . Feb 2 / 0 9
STEP PROCEDURE
13. Ve r i f y vo l t a ge d i s p lay e d o n Dig i t a l Mult i m e t e r is 5 V dc ( ± 0 . 25 V d c ). I f v olt a g e
exce e d s 5. 2 5 V , a d j u st R9 9 3 2 as f o l lows :
WARNING: THE FRONT AND REAR P A N E L A S S E M B L I E S C A R R Y 120 OR
240 VAC POTE NT I A L W H E N T HE POWER CORD IS CONNECTED
TO THE ATC-1400A-2 A N D E X T E R N A L AC POWER SOURCE. D O
NOT CONTACT THESE OR ANY ASSOCIATED COMPONENTS
DURING CALIBRATION.
● Set A T C - 1 4 0 0 A-2 P OW E R S w i t c h to O F F .
● Disco n n e c t ac p o w e r co r d f rom AC I N P U T C o n nect o r .
● Remove t h e bott o m c o v er f r o m t h e AT C - 1 4 0 0A-2 a c c ord i n g to t h e
disa s s e mbly p r o c e dur e i n 2-3 - 1 D ( 1)(a ) .
● Recon n e c t ac p o w e r cor d t o AC INP U T C o n n ect o r .
● Set A T C - 1 4 0 0 A-2 P OW E R S w i t c h to O N .
● Adju s t R 9 932 ( + 5 V A d j u stment ) t h rou g h t he s ma l l a dju s t m e n t hol e o n th e
unde r s i d e of t h e AT C- 1 4 0 0 A-2 ( d i rect l y u nde r n e ath t h e Powe r S uppl y
Asse mb l y ) , a s n e ede d t o se t v olta g e ≤±5. 2 5 V dc.
● Set A T C - 1 4 0 0 A-2 P OW E R S w i t c h to O F F .
● Repea t S t eps 3 t hro u g h 13 u n t i l Micr o p r oces s o r PC B o a r d As s e m b l y vo l t a g e
is 4 . 9 Vdc ( ±0 . 0 5 V ) a n d V i d e o As s e m b l y vo l t a ge i s ≤5.25 V d c .
14. Dis c o n nec t D i git a l M u l timet e r posi t i ve l e a d fr o m P / J 710 1 , p in 1 . C o nne c t D i gita l
Multimet e r p osi t i v e le a d to P / J 7 101 , p i n 3 . R e fer t o J 7101 ( 2 - 2-2, F i g ure 2 6 ) on
Vide o A ssembl y . Ver i f y +12 V d c (±0. 2 V ) is d i s pla y e d on Di g i t al Mul t i m e t er.
15. Dis c o n nec t D i git a l M u l timet e r posi t i ve l e a d fr o m P / J 710 1 , p in 3 . C o nne c t D i gita l
Multimet e r p osi t i v e le a d to P / J 7 101 , p i n 5 . R e fer t o J 7101 ( 2 - 2-2, F i g ure 2 6 ) on
Vide o A ssembl y . Ver i f y -12 V d c (±0.5 V ) is d i s play e d on Di g i t al Mul t i m e t e r.
16. Dis c o n nec t D i git a l M u l timet e r posi t i ve l e a d fr o m P / J 710 1 , p in 5 . C o nne c t D i gita l
Multimet e r p osi t i v e le a d to P / J 7 101 , p i n 6 . R e fer t o J 7101 ( 2 - 2-2, F i g ure 2 6 ) on
Vide o A s sembl y . Veri f y -5 V d c ( ±0.2 V ) i s d i s p l aye d o n Dig i t a l Mult i me t e r .
17. Set POWE R S w i t ch t o O F F .
18. Dis c o n nec t t e st e q u ipment .
19. Rei n s tal l a ll a s s embli e s .