1
SA1521z REPAIR MANUAL
2
These instructions are intended to help restore any ailing SA1521z Active
Loudspeaker back to factory working conditions. They show how to remove and
replace the drivers and the amplifier assembly.
Please contact Mackie Tech Support (1-800-898-3211) to receive a Service
Request Number and Order Number for parts needed for this restoration. They will
also help you determine the nature of the problem and what parts will repair the unit.
Tools needed:
***NOTE: not all tools listed below will be needed for your repair***
• Phillips head screwdriver.
• 3mm and 4mm allen wrench.
• 10mm open end wrench OR 13/32 inch socket.
• Solid workbench.
• Non-carpeted work area due to static electricity. If available, an ESD mat
(Electro-static discharge) is optimal.
Parts needed:
***NOTE: not all parts listed below will be needed for your repair***
• Led PCB Assembly
Part #0007334
pages 3-4
• 15” Woofer
Part #0013918
pages 5-6
• High Frequency Driver
Part #0013925
pages 7-9
• Diaphragm
Part #coming soon
page 10
• Amplifier Assembly
Part #0013838-00
pages 11-13
Safety Warnings:
• Make sure that you turn off the unit and disconnect the power cord (and all
other cords) before you begin these procedures.
• Always use safety glasses!
• Please try NOT to touch any of the pcb circuitry, capacitors, resistors, etc.
• Take care to read and follow these instructions. It may help to read the
instructions prior to the repair to get an idea of what it entails.
• Before beginning the repair, touch metal to discharge any lingering internal
static electricity.
3
Led PCB replacement:
1
2
Three screws need to be removed from
each side of the grill using the phillips
head screwdriver (six screws in all).
Keep the six screws in a safe place.
3
Carefully begin to remove the grill. Do
not fully remove the grill as the cable
is still firmly attached to the led PCB
assembly.
4
Carefully remove the cable attached to
the led PCB assembly.
4
Led PCB replacement continued:
5
Use the phillips head screwdriver to
remove one screw near the center of
the led PCB assembly.
6
Carefully remove the led PCB assembly
from the back side of the grill.
7
The hard part is done, the rest is easy!
Place the new led PCB assembly (part
#0007334) where the old one was. Follow
the same steps as above, but backwards
6 to 1. Power up the SA1521z and the led
should light up. Congratulations, you just
replaced an led PCB assembly...now go
play some shows!
5
Woofer replacement:
1
Follow steps 1-4 of the led PCB
replacement instructions, as the grill will
need to be removed in order to access
the woofer.
1
2
Keep the eight screws and flat washers in
a safe place.
4
Carefully begin to remove the woofer.
This woofer has a tendency to want to
“pop out,” so please be sure to hold
the woofer in place with your free hand
while removing the screws with the other
hand.
Caution: The woofer is approximately
18 pounds with the weight unevenly
distributed.
2
8
3
7
4
6
3
5
Eight screws and washers need to be
removed from the woofer using the 4mm
allen wrench.
6
Woofer replacement continued:
5
+
The positive (solid yellow) and negative
(yellow and black) cables are still
attached to the woofer terminals.
Push
in
6
Remove the cables from their terminals
simply by pushing down on the terminal
and pulling out the cable.
7
This is what it looks like with the grill and
woofer removed. Place the new woofer
(part #0013918) where the old one was.
Follow the same steps as above, but
backwards 6 to 1, making sure to keep
the led PCB assembly cable in front of
the woofer. Power up the SA1521z and
the new woofer should now be pumping
out glorious lows. Awesome, you just
replaced a 15” woofer!
7
High Frequency Driver replacement:
1
Follow steps 1-4 of the led PCB
replacement instructions, as the grill will
need to be removed in order to access
the high frequency driver.
1
2
6
5
Four screws for the top and bottom
of the horn assembly (#’s 1-4)
8
7
3
4
Four screws for the sides of
the horn assembly (#’s 5-8)
2
Eight screws and washers need to be
removed from the horn using the phillips
head screwdriver.
3
Keep the eight screws and flat washers
in a safe place. Note: There are two
different screws that connect the horn
assembly to the cabinet.
8
High Frequency Driver replacement continued:
headless screw
nut
flat washer
4
locking
washer
6
Four nuts and eight washers may be
removed from the driver using the 10mm
open end wrench OR the 13/32 inch
socket. Turn counter-clockwise to loosen
and remove, clockwise to tighten. The
other pair is in the same place on the
other side of the horn assembly. Notice
that the flat washer is on the bottom,
followed by the locking washer, and
finally the nut. Once they are removed,
the four headless screws need to be
liberated. Pliers may aid in the headless
screw liberation.
7
Keep the four nuts, four flat washers, and
four locking washers in a safe place.
Carefully begin to remove the entire horn
assembly (with the high frequency driver
still attached). A flat head screwdriver
may help in horn removal if it is sticking to
the cabinet.
Caution: The horn weighs about 5
pounds, and the weight is not evenly
distributed.
+
Push down
5
The positive (solid blue) and negative
(blue and black) cables are still
attached to the high frequency driver
terminals. Remove the cables from their
terminals simply by pushing down on the
terminal and pulling out the cable.
9
High Frequency Driver replacement continued:
+
Keep the four headless screws in a safe
place, as well.
9
The high frequency driver should easily
lift right off of the horn assembly. Holding
down the horn assembly with one hand
while lifting up on the driver with the
other hand may help.
10
-
8
This is a straight down shot of the horn
assembly. There are two somewhat
oval-shaped indents next to where the
terminal markings are, as shown above.
This is how the new frequency driver
needs to line up. Follow the same steps
as above, but backwards 9 to 1. Power
up the SA1521z and the new driver
should now be pumping out those highs
again. Fantastic, you just replaced a
high frequency driver!
10
Diaphragm replacement:
1
At the present time (November 2006),
diaphragms are not currently available,
so you will have to replace the complete
driver following the previous section
(pages 7-9). If you have received a
diaphragm, please follow the steps
below.
2
Follow steps 1-5 of the high frequency
driver replacement instructions, as the
horn will need to be removed in order to
access the diaphragm.
1
4
3
2
4
Keep the four screws in a safe place.
5
The diaphragm and plate adapter are
easily removed from the horn assembly.
They may not be broken down any
further. Place the new diaphragm (part
# coming soon) and plate assembly
where the old one was. Follow the same
steps as above, but backwards 4 to
1. Power up the SA1521z and the new
diaphragm should now be pumping
out those highs again. Sweet, you just
replaced a diaphragm!
3
The horn is shown above with the high
frequency driver circled. Four screws
need to be removed from the driver
using the 3mm allen wrench.
11
Amplifier Assembly replacement:
1
14
3
13
4
12
5
11
6
10
7
9
1
2
2
Keep the 14 screws in a safe place.
3
The covers may be worked loose by
wedging a flat head screwdriver in
between the cabinet and the cover, as
well as the amplifier assembly and cover.
Make sure to get around the entire cover
plate in order to be able to remove
them.
8
Fourteen screws need to be removed
from the amplifier assembly using the
phillips head screwdriver. The amplifier
assembly is capped by two cover plates
(part #33901380) outlined above.
12
Amplifier assembly replacement continued:
1
1
5
2
4
Once the two cover plates are removed,
two more screws need to be taken out in
order to separate the amplifier assembly
from the cabinet. Keep the two screws in
a safe place.
2
3
4
5
The amplifier assembly is now ready to
be separated from the cabinet. Do not
completely take the amplifier assembly
off yet, as five cables need to be
removed first (as shown above):
(1) led PCB cable, (2) solid blue, (3) blue
and black, (4) yellow and black, and (5)
solid yellow. Do not force cable removal
or connection, although needle-nose
pliers may aid in loosening the crimped
cables.
Caution: The amplifier assembly is
approximately 18 pounds, so please
make sure to grasp it firmly.
13
Amplifier assembly replacement continued:
5 4 3 2
5432
6b
1
6a
6
This is what it looks like with the cables
removed from the amplifier assembly:
(1) led PCB cable, (2) solid blue, (3) blue
and black, (4) yellow and black, and
(5) solid yellow. Make sure the cables are
reconnected to the same terminals they
were removed from (but on the new
amplifier assembly). See steps 6a and 6b
below for closeups of the photograph
above.
1
6a
A closeup of the led PCB cable
connector is shown above. The black
wire of the cable is closest to the edge of
the amplifier assembly. The cable only fits
in one way.
6b
7
Now for the closeups of the woofer and
high frequency driver terminals.
Place the new amplifier assembly
(part #0013838-00) where the old one
was. Follow the same steps as above,
but backwards 6 to 1. Remove the
serial number from the faulty amplifier
assembly (as shown in picture above)
and place on the new amplifier
assembly. Power up the SA1521z and
relish in the fact that you just replaced
an amplifier assembly. Hats off to you for
a job well done!
8 Important:
The faulty amplifier
assembly must be returned to LOUD
Technologies. The address should
be on the return shipping label that
was provided with the new amplifier
assembly. If not, the return address is at
the top of this page. Also, please write
the order number and service request
number (ex: 1046256-1203935) in big,
black, bold numbers on the outside of
the box. This helps expedite the return.