&
Scanner
®
2000 microEFM
Appendix C
Board Replacement
7KH6FDQQHUHOHFWURQLFFLUFXLWU\LQFOXGHVWKUHHERDUGV)LJXUH&7KHPDLQERDUGRQERWWRPRIWKH
ERDUGVWDFNZKHQWKHDVVHPEO\LVUHPRYHGIURPWKHHQFORVXUHLVDWWDFKHGWRDVPDOOHU¿HOGEXVLQWHUIDFH
ERDUGZKLFKLVLQWXUQDWWDFKHGWRDZKLWHSRWWHG¿HOGEXVPRGXOH2QO\WKHPDLQERDUGDQG¿HOGEXVLQWHUIDFH
ERDUGKDYHLQSXWRXWSXW¿HOGFRQQHFWLRQV
Fieldbus interface board
Fieldbus module
Main circuit board
Figure C.8—Circuit board arrangement
Main Board
,PSRUWDQW 6WDWLFHOHFWULFLW\FDQGDPDJHDFLUFXDQGOHQHZERDUGVRQO\E\WKHLUHGJHV
and use proper anti-static techniques (such as wearing anti-static wrist strap or touching
metal to establish an earth ground) prior to handling a board.
,PSRUWDQW ,ISRVVLEOHGRZQORDGWKHFRQ¿JXUDWLRQVHWWLQJVDQGDOODUFKLYHORJVEHIRUHUHSODFLQJWKH
FLUFXLWERDUG3UHVVWKH(17(56$9(NH\RQWKHNH\SDGEHIRUHGLVFRQQHFWLQJWKHEDW
-
WHU\WRVDYHDFFXPXODWHGÀRZUXQDQGWXUELQHYROXPHWRWDOVJUDQGWRWDODQGFXUUHQWGD\
WRWDODQGHQHUJ\DQGPDVVWRWDOVWRPHPRU\
Important
The interface board is attached securely to the main board by a standoff that is not vis-
ible when all three boards are assembled. The interface board cannot be removed from
WKHPDLQERDUGZLWKRXW¿UVWUHPRYLQJWKHZKLWHSRWWHGPRGXOHWRDFFHVVWKHVWDQGRII
7RUHSODFHWKHPDLQERDUGSHUIRUPWKHIROORZLQJVWHSV
8QVFUHZWKHFRYHUIURPWKHHQFORVXUHDQGVHWLWDVLGH
8VLQJDVPDOOVWDQGDUGEODGHVFUHZGULYHUUHPRYHWKHWZRî´VFUHZVORFDWHGWRWKHULJKWDQG
/LIWWKHERDUGDVVHPEO\IURPWKHHQFORVXUHWDNLQJSUHFDXWLRQVWRDYRLGVWUDLQLQJWKHVHQVRUULEERQFDEOH
FRQQHFWLRQ
