Martin Audio – MA2.8s Amplifier
ENGLISH
16
10 MA IN TE N A N C E
U nd er n o rm al use th e a mp lifie r sho uld p ro vid e ye a rs o f tro ub le-free se rvice . Th e o nly m ainte na nce req uired b y the
u se r is to clea n th e fro n t grill p eriod ically.
In so me extre me case s it ma y be ne ce ssa ry fo r au tho rize d service pe rso nn e l to clea n the inside o f the a m plifier.
T he se co nd ition s usu ally occu r a fter prolon g ed u se, e .g . in e nviron m en ts usin g "cracked - oil" sm o ke m ach in es.
If yo u a re u sin g yo u r am p lifier fo r h ea vy d u ty u se i.e. co nce rt tou rin g o r in du stria l m usic it is recom m en de d tha t you
h ave yo u r am p lifier se rvice d eve ry 3 ye ars, pu re ly as a preve ntative m ea sure.
1 0 .1 T r o u b le s h o o t i n g
T he se a re typ ical th in gs to che ck if yo u th ink yo ur a mp lifie r is fa u lty:
F au lt: N o ou tpu t.
If th e sig na l p re se n t LE D (-4 0d B ) is illu min atin g a sig n al is e ntering th e am plifier; a nd th e likely ca u se is a n un secure d
S pe akon co nn e ctor, o r lo o se term in ation
C he ck a lso th at the VH F p ro te ction is n ot a ctiva ted . If it is, re mo ve th e cau se of th e high freq u en cy o scilla tion s fro m
the rele va nt in pu t.
F au lt: T he a m plifie r g oe s into the rm a l prote ctio n w he n d rive n a t lo w lev e l.
C he ck th at th ere is no sh ort circu it presen t a t the a mp lifie r's o utp ut, e .g . an y com p on en t in th e lou dsp ea ke r (th is ca n
o ccur w h en th e lo ud spe ake r vo ice coil g ets h ot).
F au lt: T he a m plifie r g oe s into p ro te c tion w ith p o we r in d ic ato rs o ff.
C he ck th at th e AC m a in s volta ge is w ith in th e am p lifier’s op e ra ting ra ng e , 13 0-2 65 V a nd (65 -13 5V @ 11 5V ).
O ve r/un d er-vo ltag e p ro te ction m a y ha ve occu rre d. If the am plifier is con n ecte d b y mista ke to a 3 -ph ase sup ply
(41 5V ), an in te rn al no n-resetab le fu se or re sisto r ma y h ave b lo wn . T he a m plifie r m ust the n b e re turne d to yo u r
sup plie r for se rvice / re p air.
F au lt: T he a m plifie r d oe s n ot re sp on d e ve n a fter ch ec kin g ab o ve ite m s.
In th e u nlike ly e ve n t of on a n o n-use r re ctifiab le fa ult, re turn th e a mp lifie r to yo u r su pp lie r o r an a p prove d se rvice
cen tre.
M artin A ud io ca nn ot be h e ld res p on sib le for da ma g e or in ju ry as a re su lt of the to p c ov er b e in g rem ov ed .
All material © 2007. Martin Audio Ltd. Subject to change without notice.
(33 paginas)
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