Carvin AC120S Owner's Manual
AC120S SPECIFICATIONS:
Power Rating 120V - 20A - 2000VA (maximum load)
Dimensions (1U) 1.75” H x 19” W x 10.3” D (without cord)
Weight 10.85 lbs
CARVIN ENGINEERING DATA AC120S Sequenced Output Power Conditioner
76-00121A 1006
FRONT PANEL FEATURES
1. MOUNTING
Mount the AC120S in a standard 19” rack, using all four screws. The best placement
for the AC120S is at the top of the rack so the LEDs can light up the other gear below.
2. LED LIGHT TUBES
To use the LED light tubes, simply pull the tubes out and position as needed. The
lights will turn on automatically when pulled out, off when pushed in.
3. TIME INTERVAL INDICATORS
One of these four LEDs will indicate the time in seconds between each outlet being
powered on or off when using the SEQ (sequenced power) button.
(1 second, 2 seconds, 3 seconds, 4 seconds)
4. TIME INTERVAL SELECT BUTTON (TIME)
Use the TIME button to change the interval between outlets powering on/off. The
interval between outlets being powered on/off will be indicated by one of the four LEDs
(see #3 above).
5. NON-SEQUENCED POWER BUTTON (ALL)
Use the ALL button to turn on or off all the outlets all at one time. Use as a master
switch if sequenced power is not necessary.
6. SEQUENCED POWER BUTTON (SEQ)
The SEQ button turns ON the outlets in sequence 1 thru 10, and OFF in reverse order
10 thru 1. (see #3 and #4 above)
7. OUTLET INDICATOR LEDS
The LEDs numbered 1-10 indicate which outlets are powered ON. The “1” outlet is
furthest from the AC input cord, on the right as viewed from the rear.
8. OUTLET MANUAL POWER BUTTONS (1-10)
Use the buttons labeled 1-10 to turn on or off the individual outlets manually.
9. LINE VOLTAGE METER
The LINE VOLTAGE meter displays the AC voltage available at the rear AC outlets. The
reading should be between about 110 and 120 volts.
10. POWER SWITCH
The POWER switch turns on the LED light tubes and LINE VOLTAGE meter and allows
the rear outlets to be turned on from the SEQ or ALL button.
REAR PANEL FEATURES
11. AC POWER INPUT CORD
The AC120S is designed to run on 120V / 60Hz. Never defeat the grounded connection
or electrocution may result!
12. FUSE
The FUSE provides over current protection of the AC120S internal circuits. Replace
only with same size and type. The fuse does not protect outlets.
13. AC OUTLETS
The rear AC outlets allow for up to ten standard spaced plugs. Before plugging gear
into the AC120S, check the front LINE VOLTAGE meter and verify that it is in the safe
range specified by the gear manufacturer. Sequenced startup will begin with the outlet
furthest from the AC input cord.
SET-UP and OPERATION - SEE BACK OF SHEET
Receiving Inspection
INSPECT YOUR ITEM FOR DAMAGE which may have occurred during shipping. If
damage is found, please notify the shipping company & CARVIN.
SAVE THE CARTON & ALL PACKING MATERIALS. In the event you have to re-ship
your unit, always use the original carton and packing material. This will provide the
best possible protection during shipment. CARVIN and the shipping company are not
liable for any damage caused by improper packing.
SAVE YOUR INVOICE. It will be required for warranty service if needed in the future.
SHIPMENT SHORTAGE. If you find items missing, they may have been shipped
separately. Please allow several days for the rest of your order to arrive before inquiring.
RECORD THE SERIAL NUMBER on the enclosed warranty card or below on this
manual for your records. Keep your portion of the card and return the portion with
your name and comments to us.
USA customers register online at: www.carvin.com/registration
All other countries register online at: www.carvinworld.com/registration
For your records, you may wish to record the following information.
Serial No._____________________ Invoice Date______
_________
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The AC120S is a safe and convenient power distribution unit offering
several devices to protect your valuable rack-mounted equipment.
Turning on (or off) a complete audio system from one switch can create
loud “POP”s which can damage speakers and other gear. The other
option is going to various pieces of equipment to turn them on (and off)
in the proper order by hand. The AC120S features sequenced power
start-up and shutdown. Each outlet is turned on one at a time, with a
delay between each one. This delay prevents pops, by allowing each piece
of gear time to properly power up before audio signals pass through.
The AC120S also features an EMI filter which suppresses RF (radio
frequency) and other AC line noise, resulting in quieter operation of units
plugged into it. The Line Voltage meter displays the incoming voltage
from 100-130 VAC, assuring the AC voltage is in a safe operating range
for your gear. Two retractable LED light tubes provide a cool-running light
source for all the gear in your rack, and will never burn out. You will find
the AC120S Sequenced Power Conditioner an invaluable addition to your
rack.
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12340 World Trade Dr. San Diego, CA 92128
www.carvin.com 800-854-2235
PLUGGING IN:
To prevent speaker pops and other surges, it is important to have your equipment
power on in the correct order. The order is fairly simple to understand, because it
is the same order that audio signals pass through your system. Most importantly,
turn power amps ON last, and turn them OFF first. This will prevent the power
amps from amplifying pops and possibly damaging your speakers. The AC120S
will turn ON the rear outlets in order from 1 to 10, and will turn them OFF in
reverse order from 10 to 1.
Plug in each unit in order of the audio signal path, beginning with the right rear
outlet (the outlet labeled “1” in the image on the front page), which is furthest
from the AC cord.
Example:
1. Wireless mic receivers or mic preamp units.
2. The mixer.
3. Compressors/processors in the mic inserts.
4. Effect processors in the effect loops of the mixer.
5. EQ’s or compressor/limiters between the mixer and amps.
6. Electronic crossovers or speaker management controllers.
7. Power amps.
Power amps are always powered ON LAST and OFF FIRST.
*NOTE: The maximum total current available to the all ten outlets is 20 AMPS. A
maximum of one high powered amplifier can be plugged into the AC120S (such a
DCM1000 or larger).
CHECKING YOUR SETUP:
Now that you have your gear plugged into the AC120S in the proper order, press
“IN” the POWER switch. The LINE VOLTAGE meter should display a number from
about 110 to 120 volts. If the voltage is too high or too low, your equipment may
become damaged or not turn on. Consult your owner’s manuals for acceptable
ranges.
Turn all gear plugged into the AC120S to their ON positions.
(Once your setup is complete, you can leave the switches for this gear in the ON
position, and use the AC120S for off/on.)
If you are using any amplifiers not plugged in to the AC120S, turn them ON
LAST, after the power ON sequence is finished.
(These amps should also be shut OFF FIRST, before starting the power OFF
sequence.)
Make sure that your power amps are set to a low volume but not off, so you can
hear pops if they happen but are least likely to damage gear.
TEST:
To test the order of your plugs, press the “1” button on the front panel. The white
LED just above the “1” should light up. (see item #8 MANUAL POWER buttons, on
front page). Continue with buttons 2 to 10, and notice if any pops are heard. If a
loud pop is heard when pressing a certain button, you may need to change the
order of your plugs. Now turn each outlet OFF, in reverse order 10 to 1, listening
for pops and re-arrange the order if necessary.
POWERING UP:
Press the SEQ button on the front panel. The LEDs 1 thru 10 on the front panel
will start coming on. If there are any loud pops coming out of your system at any
time during the sequence, you may need to increase the TIME setting, or change
the order of your AC plugs on the rear of the AC120S.
POWER OFF:
First, turn off any amps in the signal path not plugged into the AC120S.
Press the SEQ button again to begin the POWER OFF sequence. The LEDs will
begin to turn off in reverse order, 10 thru 1.
Again, if there are any loud pops coming out of your system at any time during
the sequence, you may need to increase the TIME setting, or change the order of
your AC plugs.
To shut off power during the sequence on or sequence off period, turn off the
main POWER switch on the front panel.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
IMPORTANT! FOR YOUR PROTECTION, PLEASE READ THE FOLLOWING:
WATER AND MOISTURE: Do not expose this appliance to rain or moisture. Do not use this apparatus near water (in
a wet basement, near a swimming pool, bathtub etc). Care should be taken so that liquids are not spilled or splashed
onto the unit. Do not place objects filled with liquids such as beverage containers on this apparatus.
POWER SOURCES: The appliance should be connected to a power supply only of the type described in the
operating instructions or as marked on the unit. Unplug during lightning storms.
GROUNDING OR POLARIZATION: Precautions should be taken so that the grounding or polarization means of
an appliance is not defeated.
POWER CORD: Power supply cords should be routed so that they are not likely to be walked on or pinched by
items placed upon or against them, paying particular attention to cords at plugs and the point where they exit
from the appliance. The plug or power inlet is the disconnect device and shall remain readily operable.
PLACEMENT: Do not block ventilation openings. Do not install near heat sources such as radiators, stoves or
other products that produce heat. Do not install in a confined area. Use only mounting hardware such as
brackets and tripods recommended by the manufacturer.
SERVICING: The user should not attempt to service the unit. All servicing should be referred to qualified service
personnel.
FUSING: If your unit is equipped with a fuse receptacle, replace only with the same type fuse. Refer to
replacement text on the unit for correct fuse type.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL!
THIS UNIT CONTAINS HIGH VOLTAGE INSIDE!
CAUTION
RISK OF ELECTRIC SHOCK
This symbol is intended to
alert the user to the
presence of uninsulated
“dangerous voltage” within
the product’s enclosure that may be of
sufficient magnitude to constitute a risk of
electric shock to persons.
This symbol is intended
to alert the user to the
presence of important
operating and
maintenance (servicing) instructions
in the literature accompanying the
appliance.
LIMITED WARRANTY
Your Carvin product is guaranteed against failure for ONE YEAR unless otherwise stated. Carvin
will service and supply all parts at no charge to the customer providing the unit is under warranty.
Shipping costs are the responsibility of the customer. CARVIN DOES NOT PAY FOR PARTS OR
SERVICING OTHER THAN OUR OWN. A COPY OF THE ORIGINAL INVOICE IS REQUIRED TO
VERIFY YOUR WARRANTY. This warranty does not cover, and no liability is assumed, for damage
due to: natural disasters, accidents, abuse, loss of parts, lack of reasonable care, incorrect use,
or failure to follow instructions. This warranty is in lieu of all other warranties, expressed or
implied. No representative or person is authorized to represent or assume for Carvin any liability
in connection with the sale or servicing of Carvin products. CARVIN SHALL NOT BE LIABLE FOR
INCIDENTAL OR CONSEQUENTIAL DAMAGES.
When RETURNING merchandise to the factory, you must call for a return authorization number.
If your unit is out of warranty, you will be charged the current FLAT RATE for parts and labor to
bring your unit up to factory specifications.
HELP SECTION
1) UNIT WILL NOT TURN ON
Check the power to the AC cord. Check for tripped circuit breakers, unplugged extension cords
or power-strip switches that may be turned off. Check the fuse or circuit breaker on the unit if
available. If the fuse has been replaced with the proper value and the fuse fails again, or the
internal circuit breaker activates after reset, the unit will require servicing.
2) NO OUTPUT with POWER light ON
Shipping damage will be the primary reason for your product to not function properly. Please
give us a call to help you determine the problem.
3) KEEP YOUR UNIT LOOKING NEW
Use only a dry cloth to wipe the control and venting areas. Surfaces without openings may be
cleaned with a damp cloth.
CAUTION
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