Appendix A: Amplifier Replacement And Optional Rain Hood; Removing The Mpw-4/Mica Amplifier; Replacing The Mpw-4/Mica Amplifier; Installing The Mica Quick-Clip Rain Hood - Meyer Sound M SERIES Operating Instructions Manual

APPENDIX A: AMPLIFIER REPLACEMENT AND OPTIONAL RAIN HOOD
REMOVING THE MPW-4/MICA AMPLIFIER
If you need to remove the MPW-4/MICA amplifier from a
MICA loudspeaker, perform the following steps:
1. Using a #2 Phillips screwdriver, remove all six screws
from the amplifier module — three each on the left and
right sides. This will free the MPW-4/MICA electronics
module from MICA cabinet (Figure A.1).
Right Front
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M e ye r S ound, B e rk e le y, C A . U S A M e ye r S ound, B e rk e le y, C A . U S A
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Location of the six screws securing the MPW-4/MICA
Figure A.1.
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amplifier module
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2. Carefully slide the amplifier module out of the cabinet
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using care not to stress the cables.
3. Disconnect the two 4-pin loudspeaker connectors. Note
that the harness with red and black wires goes to the
connector closest to the center of the amplifier module,
and labeled "A", while the harness with green and white
cables goes to the connector closest to the left side,
and labeled "B" (Figure A.2).
-------- Fans --------
Upper Control Card Lower Control Card
24.033.042.46 24.033.042.45
B A
User Pane
Figure A.2. MICA's two 4-pin connectors
C AUT IO N C AUT IO N R IS K O F E L E C T R IC S HO C K R IS K O F E L E C T R IC S HO C K
DO NOT O P E N DO NOT O P E N
WA R N I N G S : WA R N I N G S :
T H I S P R O D U C T M U S T B E G R O U N D E D. T H I S P R O D U C T M U S T B E G R O U N D E D.
This surface ma This surface ma y reac h high temperatures while in use y reac h high temperatures while in use
To ensure pr oper operation, To ensure pr oper operation, allo w at least 6 inc allo w at least 6 inc
clearance fr om this surface and adequate ventilation. clearance fr om this surface and adequate ventilation.
No operator ser No operator ser viceab le par ts inside . viceab le par ts inside .
Ref er ser vicing to qualified per Ref er ser vicing to qualified per sonnel. sonnel.
To reduce the risk of fire or electric shoc To reduce the risk of fire or electric shoc k k
do not e xpose this appliance to rain or moisture do not e xpose this appliance to rain or moisture
AT E N C I Ó N
AT E N C I Ó N : : A C C E S O I N T E R N O S O L O A C C E S O I N T E R N O S O L O
A U TO R IZ A D O A P E R S O N A L T É C N IC O C A L IF IC A D O A U TO R IZ A D O A P E R S O N A L T É C N IC O C A L IF IC A D O
M I C A M I C A
10 10 A C H T U N G A C H T U N G : : G E H ÄU S E N IC H T Ö F F N E N WA R T U N G G E H ÄU S E N IC H T Ö F F N E N WA R T U N G
UND R E PA R AT UR NUR DUR C H E L E K T R OFAC HK R Ä F T E UND R E PA R AT UR NUR DUR C H E L E K T R OFAC HK R Ä F T E
H i g h C h L i m i t H i g h C h L i m i t AT T E N T I O N AT T E N T I O N : : E N T R E T I E N E T R E P A R AT I O N S E N T R E T I E N E T R E P A R AT I O N S
I N T E R N E S N E S O N T A U T O R I S E E S Q U ' A U I N T E R N E S N E S O N T A U T O R I S E E S Q U ' A U
L o w C h L i m i t L o w C h L i m i t P E R S O N N E L T E C H N I Q U E Q UA L I F I É P E R S O N N E L T E C H N I Q U E Q UA L I F I É
10 10
U K WA R N I N G U K WA R N I N G : :
T H I S A P P A R AT U S M U S T B E E A R T H E D. T H I S A P P A R AT U S M U S T B E E A R T H E D.
A c ti v e A c ti v e NO OPERA TOR SER VICEABLE P NO OPERA TOR SER VICEABLE P AR TS INSIDE. AR TS INSIDE.
REFER SER REFER SER VICING T O Q UALIFIED PERSONNEL VICING T O Q UALIFIED PERSONNEL
PUSH PUSH
Left Front
Auto-V olta ge Select Auto-V olta ge Select
2 + 2 + ~ ~ ~ ~
95-125V 95-125V 208-235V 208-235V
3 - 3 -
50-60Hz 50-60Hz 50-60Hz 50-60Hz
Ω Ω
10K 10K 2000W RMS MAX 2000W RMS MAX 2000W RMS MAX 2000W RMS MAX
Balanced Balanced
Operational V olta ge Rang e: Operational V olta ge Rang e: ~ ~ ~ ~
Turn on 85V T urn off 134V
Turn on 85V ~ ~ T urn off 134V ~ ~
1 1 Turn on 165V Turn on 165V T urn off 264V T urn off 264V
Ω Ω
ESD ESD 220K 220K 2 2 1 1 1 1 2 2
N e tw o r k N e tw o r k
3 3 3 3
Case Case
Ear th / Chassis Ear th / Chassis
Input Input Loop Loop
R e m o t e R e m o t e M o n i t o r M o n i t o r S y s t e m S y s t e m
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MICA
MPW-4 Amplifier Chassis
(Top View)
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REPLACING THE MPW-4/MICA AMPLIFIER
To replace MICA's MPW-4 amplifier, do the following:
1. Gently slide the amplifier partially back into MICA and
connect the two loudspeaker connectors. Make sure
they are connected properly. The harness with red
and black wires goes to the connector closest to the
center of the amplifier module, and labeled "A", while
the harness with green and white cables goes to the
connector closest to the left side, and labeled "B".
2. Slide the amplifier module the rest of the way into the
! !
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hes hes
cabinet, until it rests against the foam gasket. Start all
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six screws into the holes before tightening them.
3. Once all six screws are started, tighten them using a #2
Phillips screwdriver.
CAUTION:
Meyer Sound amplifiers are different. Specific
functions for each model, such as crossover
points, frequency and phase correction and driver
protection are determined by the control cards
installed inside the amplifier. Do not exchange
amplifiers between MICA and other loudspeakers.
CAUTION:
torque settings to remove or replace the
stainless steel amplifier and/or rain hood screws on
the MICA loudspeaker.
INSTALLING THE MICA QUICK-CLIP RAIN
HOOD
1. Remove the three screws along the top side of the
recess just above the amplifier chassis, using a Phillips
screwdriver; set the screws aside.
2. Position the 24" retainer strip in the recess just above
the amplifier, placing the side with the three holes
against the enclosure and lining up those holes with the
ones in the enclosure. Note that the three cutouts to
allow screwdriver access are facing toward you.
3. Attach the retainer strip to the enclosure using the three
screws removed in step 1. Hand-tighten the screws
with the Phillips screwdriver until the retainer is snug
against the cabinet, and the screw heads are flush with
the inside surface of the retainer.
Please note that MICA and other
Never use power tools in high
APPENDIX A
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