40
Installation and Maintenance
Service Manual
9. Maintenance
9.1 Precautions before Maintenance
7KHUHDUHKLJKFDSDFLW\HOHFWURO\WLFFDSDFLWRUVRQWKHRXWGRRUPDLQERDUG7KXVHYHQWKHSRZHULVFXWRIIWKHUHLVKLJKYROWDJHLQVLGH
WKHFDSDFLWRUVDQGLWQHHGVPRUHWKDQPLQWRUHGXFHWKHYROWDJHWRVDIHW\YDOXH7RXFKLQJWKHHOHFWURO\WLFFDSDFLWRUZLWKLQPLQDIWHU
FXWWLQJWKHSRZHUZLOOFDXVHHOHFWULFVKRFN,IPDLQWHQDQFHLVQHHGHGIROORZWKHVWHSVEHORZWRGLVFKDUJHHOHFWULFLW\RIHOHFWURO\WLFFD-
pacitor after power off.
2SHQWKHWRSFRYHURIRXWGRRUXQLWDQGWKHQUHPRYHWKHFRYHURIHOHFWULFER[
$VVKRZQLQWKH¿JEHORZFRQQHFWWKHSOXJRIGLVFKDUJHUHVLVWDQFHDERXWRKP:LIWKHUHLVQRGLVFKDUJHUHVLVWDQFH\RX
FDQXVHWKHSOXJRIVROGHULQJLURQWRSRLQW$DQG%RIHOHFWURO\WLFFDSDFLWRU7KHUHZLOOEHVSDUNVZKHQWRXFKLQJWKHP3UHVVWKHPIRUF-
LEO\IRUVWRGLVFKDUJHHOHFWULFLW\RIHOHFWURO\WLFFDSDFLWRU
$IWHU¿QLVKGLVFKDUJLQJHOHFWULFLW\PHDVXUHWKHYROWDJH EHWZHHQSRLQW$DQG%ZLWKXQLYHUVDOPHWHUWRPDNHVXUHLIHOHFWULFLW\GLV-
FKDUJLQJLVFRPSOHWHGLQRUGHUWRSUHYHQWHOHFWULFVKRFN,IWKHYROWDJHEHWZHHQWKHWZRSRLQWVLVEHORZ9\RXFDQSHUIRUPPDLQWH-
nance safely.
A
B
A
B
discharge resistance or
plug of soldering iron
RXWGRRUPDLQERDUG
FRYHURIHOHFWULFER[
RXWGRRUPDLQERDUG