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SA1521z REPAIR MANUAL
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3
Led PCB replacement:
Three sc rews need to be removed from
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ea c h side of the grill using the phillips
hea d sc rewdriver (six sc rews in a ll).
C a refully begin to remove the grill. Do
not fully remove the grill a s the c a ble
is still firmly a tta c hed to the led PC B
a ssembly.
3
4
C a refully remove the c a ble a tta c hed to
the led PC B a ssembly.
Keep the six sc rews in a sa fe pla c e.
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4
Led PCB replacement continued:
Use the phillips hea d sc rewdriver to
remove one sc rew nea r the c enter of
the led PC B a ssembly.
5
C a refully remove the led PC B a ssembly
from the ba c k side of the grill.
6
7
The ha rd pa rt is done, the rest is ea sy!
Pla c e the new led PC B a ssembly (pa rt
#0007334) where the old one wa s. Follow
the sa me steps a s a bove, but ba c kwa rds
6 to 1. Power up the SA1521z a nd the led
should light up. C ongra tula tions, you just
repla c ed a n led PC B a ssembly...now go
pla y some shows!
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5
Woofer replacement:
Follow steps 1-4 of the led PC B
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repla c ement instruc tions, a s the grill will
need to be removed in order to a c c ess
the woofer.
Keep the eight sc rews a nd fla t wa shers in
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4
a sa fe pla c e.
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1
8
7
3
4
6
5
C a refully begin to remove the woofer.
This woofer ha s a tendenc y to wa nt to
“pop out,” so plea se be sure to hold
the woofer in pla c e with your free ha nd
while removing the sc rews with the other
ha nd.
Eight sc rews a nd wa shers need to be
removed from the woofer using the 4mm
a llen wrenc h.
2
Caution: The woofer is a pproxima tely
18 pounds with the weight unevenly
distributed.
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Woofer replacement continued:
-
+
The positive (solid yellow) a nd nega tive
(yellow a nd bla c k) c a bles a re still
a tta c hed to the woofer termina ls.
5
6
Push
in
This is wha t it looks like with the grill a nd
woofer removed. Pla c e the new woofer
(pa rt #0013918) where the old one wa s.
Follow the sa me steps a s a bove, but
ba c kwa rds 6 to 1, ma king sure to keep
the led PC B a ssembly c a ble in front of
the woofer. Power up the SA1521z a nd
the new woofer should now be pumping
out glorious lows. Awesome, you just
repla c ed a 15” woofer!
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Remove the c a bles from their termina ls
simply by pushing down on the termina l
a nd pulling out the c a ble.
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7
High Frequency Driver replacement:
Follow steps 1-4 of the led PC B
1
repla c ement instruc tions, a s the grill will
need to be removed in order to a c c ess
the high frequenc y driver.
2
4
1
3
6
8
5
7
Four screws for the top and bottom
of the horn assembly (#’s 1-4)
Four screws for the sides of
the horn assembly (#’s 5-8)
Eight sc rews a nd wa shers need to be
removed from the horn using the phillips
hea d sc rewdriver.
Keep the eight sc rews a nd fla t wa shers
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3
in a sa fe pla c e. Note: There a re two
different sc rews tha t c onnec t the horn
a ssembly to the c a binet.
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8
High Frequency Driver replacement continued:
hea dless sc rew
nut
loc king
wa sher
fla t wa sher
Four nuts a nd eight wa shers ma y be
removed from the driver using the 10mm
open end wrenc h OR the 13/32 inc h
soc ket. Turn c ounter-c loc kwise to loosen
a nd remove, c loc kwise to tighten. The
other pa ir is in the sa me pla c e on the
other side of the horn a ssembly. Notic e
tha t the fla t wa sher is on the bottom,
followed by the loc king wa sher, a nd
fina lly the nut. Onc e they a re removed,
the four hea dless sc rews need to be
libera ted. Pliers ma y a id in the hea dless
sc rew libera tion.
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C a refully begin to remove the entire horn
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5
a ssembly (with the high frequenc y driver
still a tta c hed). A fla t hea d sc rewdriver
ma y help in horn remova l if it is stic king to
the c a binet.
Caution: The horn weighs a bout 5
pounds, a nd the weight is not evenly
distributed.
+
-
Push down
The positive (solid blue) a nd nega tive
(blue a nd bla c k) c a bles a re still
a tta c hed to the high frequenc y driver
termina ls. Remove the c a bles from their
termina ls simply by pushing down on the
termina l a nd pulling out the c a ble.
Keep the four nuts, four fla t wa shers, a nd
four loc king wa shers in a sa fe pla c e.
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High Frequency Driver replacement continued:
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-
Keep the four hea dless sc rews in a sa fe
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9
pla c e, a s well.
This is a stra ight down shot of the horn
a ssembly. There a re two somewha t
ova l-sha ped indents next to where the
termina l ma rkings a re, a s shown a bove.
This is how the new frequenc y driver
needs to line up. Follow the sa me steps
a s a bove, but ba c kwa rds 9 to 1. Power
up the SA1521z a nd the new driver
should now be pumping out those highs
a ga in. Fa nta stic , you just repla c ed a
high frequenc y driver!
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The high frequenc y driver should ea sily
lift right off of the horn a ssembly. Holding
down the horn a ssembly with one ha nd
while lifting up on the driver with the
other ha nd ma y help.
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Diaphragm replacement:
At the present time (November 2006),
dia phra gms a re not c urrently a va ila ble,
so you will ha ve to repla c e the c omplete
driver following the previous sec tion
(pa ges 7-9). If you ha ve rec eived a
dia phra gm, plea se follow the steps
below.
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2
Follow steps 1-5 of the high frequenc y
driver repla c ement instruc tions, a s the
horn will need to be removed in order to
a c c ess the dia phra gm.
Keep the four sc rews in a sa fe pla c e.
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4
5
2
4
3
The horn is shown a bove with the high
frequenc y driver c irc led. Four sc rews
need to be removed from the driver
using the 3mm a llen wrenc h.
3
The dia phra gm a nd pla te a da pter a re
ea sily removed from the horn a ssembly.
They ma y not be broken down a ny
further. Pla c e the new dia phra gm (pa rt
# c oming soon) a nd pla te a ssembly
where the old one wa s. Follow the sa me
steps a s a bove, but ba c kwa rds 4 to
1. Power up the SA1521z a nd the new
dia phra gm should now be pumping
out those highs a ga in. Sweet, you just
repla c ed a dia phra gm!
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Amplifier Assembly replacement:
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1
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3
4
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Keep the 14 sc rews in a sa fe pla c e.
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6
7
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Fourteen sc rews need to be removed
from the a mplifier a ssembly using the
phillips hea d sc rewdriver. The a mplifier
a ssembly is c a pped by two c over pla tes
(pa rt #33901380) outlined a bove.
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The c overs ma y be worked loose by
wedging a fla t hea d sc rewdriver in
between the c a binet a nd the c over, a s
well a s the a mplifier a ssembly a nd c over.
Ma ke sure to get a round the entire c over
pla te in order to be a ble to remove
them.
3
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Amplifier assembly replacement continued:
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1
2
3
4
5
The a mplifier a ssembly is now rea dy to
be sepa ra ted from the c a binet. Do not
c ompletely ta ke the a mplifier a ssembly
off yet, a s five c a bles need to be
removed first (a s shown a bove):
(1) led PC B c a ble, (2) solid blue, (3) blue
a nd bla c k, (4) yellow a nd bla c k, a nd (5)
solid yellow. Do not forc e c a ble remova l
or c onnec tion, a lthough needle-nose
pliers ma y a id in loosening the c rimped
c a bles.
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Caution: The a mplifier a ssembly is
a pproxima tely 18 pounds, so plea se
ma ke sure to gra sp it firmly.
2
Onc e the two c over pla tes a re removed,
4
two more sc rews need to be ta ken out in
order to sepa ra te the a mplifier a ssembly
from the c a binet. Keep the two sc rews in
a sa fe pla c e.
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13
Amplifier assembly replacement continued:
5 4 3 2
5432
1
6b
6a
Now for the c loseups of the woofer a nd
high frequenc y driver termina ls.
6b
This is wha t it looks like with the c a bles
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removed from the a mplifier a ssembly:
(1) led PC B c a ble, (2) solid blue, (3) blue
a nd bla c k, (4) yellow a nd bla c k, a nd
(5) solid yellow. Ma ke sure the c a bles a re
rec onnec ted to the sa me termina ls they
were removed from (but on the new
a mplifier a ssembly). See steps 6a a nd 6b
below for c loseups of the photogra ph
a bove.
Pla c e the new a mplifier a ssembly
(pa rt #0013838-00) where the old one
wa s. Follow the sa me steps a s a bove,
but ba c kwa rds 6 to 1. Remove the
seria l number from the fa ulty a mplifier
a ssembly (a s shown in pic ture a bove)
a nd pla c e on the new a mplifier
a ssembly. Power up the SA1521z a nd
relish in the fa c t tha t you just repla c ed
a n a mplifier a ssembly. Ha ts off to you for
a job well done!
7
1
A c loseup of the led PC B c a ble
c onnec tor is shown a bove. The bla c k
wire of the c a ble is c losest to the edge of
the a mplifier a ssembly. The c a ble only fits
in one wa y.
6a
Important: The fa ulty a mplifier
a ssembly must be returned to LOUD
Tec hnologies. The a ddress should
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be on the return shipping la bel tha t
wa s provided with the new a mplifier
a ssembly. If not, the return a ddress is a t
the top of this pa ge. Also, plea se write
the order number a nd servic e request
number (ex: 1046256-1203935) in big,
bla c k, bold numbers on the outside of
the box. This helps expedite the return.
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