LOUD Technologies SR1530 Operating instructions

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SR1530 REPAIR MANUAL
SR1530 REPAIR MANUAL

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These instructions are intended to help restore any ailing SR1530 Active
Loudspeaker back to factory working conditions. They show how to remove and
replace the drivers and the amplifier assembly.
Please contact Mackie Technical 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.
• 4mm allen wrench.
• 8mm combination wrench.
• 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 #0008873-01 pages 5-6
• High Frequency Driver Part #0010022 pages 7-10
• Diaphragm Part #coming soon page 11
• Amplifier Assembly Part #0005688 pages 12-13
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.

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Led PCB replacement:
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2Keep the eight screws in a safe place.
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4Carefully remove the cable attached to
the led PCB assembly.
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1Four screws need to be removed from each side of the grill (eight screws total)
using the phillips head screwdriver.
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3Carefully begin to remove the grill. Do not fully remove the grill as the cable
is still firmly attached to the led PCB
assembly. A flat head screwdriver may
aid in loosening the grill from the cabinet.
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7
7The 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 SR1530 and the led
should light up. Congratulations, you just
replaced an led PCB assembly...now go
play some shows!
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6Carefully remove the led PCB assembly from the back side of the grill.
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5Use the phillips head screwdriver to remove one screw near the center of
the led PCB assembly.
Led PCB replacement continued:

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Woofer replacement:
1
1Follow steps 1-4 of the led PCB replacement instructions, as the grill will
need to be removed in order to access
the woofer.
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2Eight screws and washers need to be removed from the woofer using the 4mm
allen wrench.
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3Keep the eight screws and flat washers in a safe place.
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4Carefully begin to remove the woofer. A flat head screwdriver may aid in
loosening the woofer by prying between
it and the cabinet. Hold the woofer
in place with one hand while prying
around the edge with your free hand.
Caution: The woofer is approximately
11 pounds with the weight unevenly
distributed.

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Woofer replacement continued:
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6The picture on the right shows what the SR1530 looks like with the grill and woofer
removed . Place the new woofer (part
#0008873-01) where the old one was.
Follow the same steps as above, but
backwards 5 to 1, making sure to keep
the led PCB assembly cable in front of
the woofer. Power up the SR1530 and
the new woofer should now be pumping
out glorious lows. Awesome, you just
replaced a 15” woofer!
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5The positive (solid yellow) and negative (yellow and black) cables are still
attached to the woofer terminals.
Remove the cables from their terminals
simply by pushing down on the terminal
and pulling out the cable.
-
-
+
+
Push down
Push down
*
*If you find it too difficult to connect the
cables to the woofer terminals due to
the short length of the cables, there is an
easier (albeit lengthier) way to connect
them. Instead of reconnecting the
cables to their terminals, just attach the
woofer to the cabinet as normal. Follow
steps 1-6 on how to remove the horn
assembly (pages 7-8) as this is an easier
way to access the woofer terminals
without having to work under such tight
circumstances!

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High Frequency Driver replacement:
1
1Follow 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.
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2Fourteen screws and flat washers need
to be removed from the horn assembly
using the phillips head screwdriver.
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3Keep the fourteen screws and flat washers in a safe place.
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4Carefully begin to remove the entire
horn assembly (with the high and mid
frequency drivers still attached). A flat
head screwdriver may aid in loosening
the horn assembly from the cabinet if it is
sticking.
Caution: The horn weighs about 13
pounds, and the weight is not evenly
distributed.
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Mid
Mid
Frequency
Frequency
Driver
Driver
High
High
Frequency
Frequency
Driver
Driver

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High Frequency Driver replacement continued:
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5The positive (solid blue) and negative (blue and black) cables are still
attached to the high frequency driver
terminals. Do not force cable removal
or connection, although needle-nose
pliers may aid in loosening the crimped
cables. The terminals are sized differently.
Be sure to reconnect the cables to the
correct-sized terminals.
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6The positive (solid green) and negative (green and black) cables are still
attached to the mid frequency driver
terminals. Do not force cable removal
or connection, although needle-nose
pliers may aid in loosening the crimped
cables. The terminals are sized differently.
Be sure to reconnect the cables to the
correct-sized terminals.
-
-
+
+
Pull out
Pull out
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-
+
+
Pull out
Pull out

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7This is what it looks like with the grill and
horn assembly removed. Continued
on the right are further instructions and
additional pictures on how to remove
and replace the high frequency driver.
High Frequency Driver replacement continued:
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8Two nuts and four washers may be
removed from the driver using the 8mm
combination wrench. Turn counter-
clockwise to loosen and remove,
clockwise to tighten. The other nut and
washers are located 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.

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High Frequency Driver replacement continued:
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9Keep the two nuts, two locking washers, and two flat washers in a safe place.
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10 The high frequency driver should easily lift right off of the horn
assembly.
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11 This is what the high frequency driver looks like removed from
the horn assembly. Two headless
screws need to be removed from
the driver. Pliers could help if the
screws are too tight. Turn counter-
clockwise to loosen and remove,
clockwise to tighten. Keep the two
headless screws in a safe place.
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Place the new high frequency driver
(part #0010022) where the old one
was by following the same steps
as above, but backwards 11 to 1.
Power up the SR1530 and the new
driver should now be pumping out
those highs again. Fantastic, you just
replaced a high frequency driver!

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3
3A closeup of the high frequency driver is shown above. Four screws and star
washers need to be removed from the
driver using the phillips head screwdriver.
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4Keep the four screws and star washers in a safe place.
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5The plate adapter and diaphragm are easily removed from the high frequency
driver. Place the new diaphragm (part #
coming soon) and plate assembly where
the old one was. Follow the same steps
as above, but backwards 5 to 1. Power
up the SR1530 and the new diaphragm
should now be pumping out those
highs again. Sweet, you just replaced a
diaphragm!
Diaphragm replacement:
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2Follow steps 1-10 of the high frequency driver replacement instructions, as the
driver will need to be removed in order
to access the diaphragm.
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1At the present time (March 2007), diaphragms are not currently available,
so you will have to replace the complete
driver following the previous section
(pages 7-10). If you have received a
diaphragm, please follow the steps
below.
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1
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Amplifier Assembly replacement:
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1Sixteen screws need to be removed from the amplifier assembly using the phillips
head screwdriver.
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2Keep the sixteen screws in a safe place.
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3The amplifier assembly is now ready to be separated from the cabinet. Do not
completely take the amplifier assembly
off yet, as seven cables need to be
removed first (as shown above):
(1) solid yellow, (2) yellow and black, (3) solid green, (4) green and black,
(5) solid blue, (6) blue and black, and (7)
the led PCB assembly cable (white cable
next to the blue and black cable). Do
not force cable removal or connection,
although needle-nose pliers may aid in
loosening the crimped cables.
Caution: The amplifier assembly is
approximately 17 pounds, so please
make sure to grasp it firmly.
top down view (close up)
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Amplifier assembly replacement continued:
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5Place the new amplifier assembly (part #0005688) where the old one was. Follow
the same steps as above, but backwards
4 to 1. Remove the serial number from
the faulty amplifier assembly (as shown
in the picture above) and place on the
new amplifier assembly. Power up the
SR1530 and relish in the fact that you just
replaced an amplifier assembly. Hats off
to you for a job well done!
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4Here is what it looks like with the seven cables removed from the amplifier
assembly. Once again, each cable
must be attached to the same terminal
that it was removed from: (1) solid
yellow, (2) yellow and black, (3) solid
green, (4) green and black, (5) solid
blue, (6) blue and black, and (7) the led
PCB assembly cable (white cable next to
the blue and black cable). Do not force
cable removal or connection, although
needle-nose pliers may aid in loosening
the crimped cables.
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6Important:The faulty amplifier
assembly must be returned to LOUD
Technologies Inc. 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.
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