User guide

Martin Audio – MA1.6s Amplifier
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9 PROTECTION FEATURES
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9.1 Output Limiter
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LVFOLSSHGLWVSHDNVDUHVTXDUHGRII±UHGXFLQJWKHFUHVWIDFWRU,QH[WUHPHFDVHVWKHZDYHIRUPFDQDS S U R D F K  W K D W  R I
DVTXDUHZDYH$QDPSOLILHULVQRUPDOO\FDSDEOHRISURGXFLQJIDUPRUHSRZHUXQGHUWKHVHFRQGLWLRQVWKDQLWVQRUPDO
XQGLVWRUWHGUDWHGRXWSXWSRZHU
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DPSOLILHU,IWKHGLVWRUWLRQH[FHHGV7+'IRUDQ\UHDVRQYROWDJHRUFXUUHQWFOLSSLQJWKHOLPLWHUUHG X F H V  W K H  L Q S X W
VLJQDOSURSRUWLRQDOO\1RWHWKDWLIWKHVLJQDOLVGLVWRUWHGRUFOLSSHGEHIRUHLWUHDFKHVWKHDPSOLILHUWKHFOLSOLPLWHUZLOOQRW
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FOLSOLPLWVZLWFK6HHSDJH
6RPHPDQXIDFWXUHUVRIORXGVSHDNHUSURFHVVRUVGRQRWUHFRPPHQGWKHXVHRIFOLSOLPLWHUVLQDPSOLILHUVDV  L W  FDQ
DIIHFWWKHWUDFNLQJRIWKHSURFHVVRUVOLPLWHUV
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21EX W WRQGHSUHVVHG
9.2 Thermal protection
:KHQWKHDPSOLILHULVGULYHQYHU\KDUGLQWRDORZLPSHGDQFHORDGWKHFRROLQJIDQVZLOOUXQDWKLJKVSHHG,IWKHVH
RSHUDWLQJFRQGLWLRQVFRQWLQXHWKH3URWHFWLQGLFDWRUVZLOOLOOXPLQDWHLQGLFDWLQJWKDWWKHDPSOLILHULVDERXW  W R  J R  L Q W R 
WKHUPDOVKX W G R Z Q 
$IWHUILYHVHFRQGVWKHDPSOLILHUZLOOJRLQWRWKH U P D O  S U R W H F W  E \  P X W L Q J  W K H  L Q S X W  V L J Q D O   $ I W H U      VHFRQGVWKH
DPSOLILHUZLOOKDYHFRROHGGRZQ H Q R X J K  I R U  W K H  D P S O L I L H U  W R  F R P H  R X W  R I  V K X W G R Z Q  D Q G  R S H U D W H  D V  Q RUPDO,IWKHORDG
FRQGLWLRQVUHPDLQXQFKDQJHGWKHWKHUPDOSURWHFWLRQZLOOEHUHLQLWLDWHG7KHUPDOSURWHFWLRQRFFXUVZKHQ  W K H  K H DWVLQN
WHPSHUDWXUHUHDFKHV
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9.3 VHF protection
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LQSXWVLJQDO7KLVLVLQGLFDWHGRQWKHIURQWSDQHO4E\WKH/('ODEHOHG3URWHFW$IWHUILYHVHFRQGVWKHRXWSXWVZLOO
XQPXWHDQGUHWXUQWRQRUPDORSHUDWLRQXQOHVVWKHRXWSXWVLJQDOKDVUHPDLQHGXQFKDQJHGLQZKLFKFDVHWKH9+)
SURWHFWLRQZLOOUHLQLWLDWH
9.4 Short circuit protection
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SHDNFXUUHQWVEXWVWLOOKROGVWKHRXWSXWGHYLFHVZLWKLQWKHVDIHRSHUDWLQJDUHD,IDVKRUWFLUFXLWLVPDLQWDLQHGWKH
FKDQQHODIIHFWHGZLOOHYHQWXDOO\JRLQWRDWKHUPDOSURWHFWF\FOHXQWLOWKHVKRUWFLUFXLWKDVEHHQUHPRYHG
9.5 AC mains voltage protection
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DXWRPDWLFDOO\VKXWGRZQ:KHQWKHPDLQVYROWDJHLVDERYHWKHPLQLPXPVWDUWYROWDJHDQGEHORZLWVPD[LPXP
RSHUDWLQJYROWDJHWKHDPSOLILHUZLOOUHVWDUW
7KHWZRJUHHQµ21¶/('¶VLQGLFDWHZKHQWKHSRZHUVXSSO\LVRSHUDWLQJFRUUHFWO\
,WWDNHVDFRXSOHRIVHFRQGVWRVHOIFKHFNWKLVLVNQRZQDVWKHVRIWVWDUWRUVORZVWDUWVHTXHQFHWKHJDLQZLOO
VORZO\DQGJUDGXDOO\EHLQFUHDVHGEDFNWRWKHSUHYLRXVO\VHWOHYHODQGWKHIDQVZLOOEORZDWKLJKVSHHGEHIRUHJRLQJ
LQWRLGOH 
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